Art
[1]This application claims the benefit of priority based on the Republic of Korea Patent Application No. 10-2017-0087121 submitted July 10 2017, and all information disclosed in the documents of the Republic of Korea patent application are included as part of the specification.
[2]
The present application is directed to a car comprising the battery pack, and these battery module or pack containing a battery module case, the battery modules, these battery module including the same.
BACKGROUND
[3]
Secondary battery and a nickel cadmium battery, a nickel hydrogen battery, a nickel-zinc battery or a lithium secondary battery, a lithium secondary battery is representative, and mainly uses a lithium oxide and a carbon material as an anode active material and the negative active material.
[4]
The secondary battery includes a positive electrode active material and negative electrode active material, which packaging material is applied to the respective positive electrode plate and negative electrode plate are sealed housing the electrode assembly and the electrode assembly is disposed with a separator in between with a liquid electrolyte. Depending on the shape of the case the secondary battery may be classified as a can type and a pouch type.
[5]
In recent years, as well as small equipment such as portable electronic devices, has become a widely used secondary batteries in the middle- or large-sized devices, such as automobiles and electric power storage device.
[6]
When used in such a middle- or large-sized devices, a large number of secondary batteries in order to increase the capacity and output are electrically connected. In particular, the middle- or large-sized apparatus is much the pouch type secondary battery used due to advantages such as that the weight is small and production cost is low and the form of modification is easy.
[7]
However, the pouch-shaped secondary battery is generally not greater mechanical strength, the battery itself is difficult to do not include a structure for making a bond between the cell stack. Thus, a plurality of pouch-shaped when configuring the secondary battery, battery modules including, protecting the secondary battery stack body from external impact or the like, and prevent its flow and, a coupling member, such as a separate cartridge to be laminated is easy this configuration is required.
[8]
Applying the case constituting the battery module in the prior art, applied to the overlap (overlap) the design of the secondary battery, body part, or method for applying a surface pressure to the body part facing the suitability, such as how to secure a secondary battery electrode terminals and the bus bar to the laser welding and a plurality of secondary cells are fixed to the inner space of the battery module. According to this conventional battery module configuration, far-electrode lead that when the external vibration is applied, as well as shaking the body of the secondary batteries connected to the electrode tab and here drawn out of the electrode assembly is transmitted mechanical shock as the effect on the electrical connection on a problem. To solve this problem, by curing after injecting the resin composition into the battery module is possible to minimize the influence of the external vibration.
[9]
However, a problem that because of the above method with a tolerance between the battery module case and the secondary battery, and between the secondary battery, so that when the interior volume different from each module to control the injection amount of the resin composition is injected into the battery module case manually each battery module have.
[10]
Therefore, this approach can provide a car including the pack battery, and this battery module or pack comprising a battery module, such a battery module including the battery module case applied to the automated process as possible, it is requested.
Detailed Description of the Invention
SUMMARY
[11]
The present application, it is possible to provide a car including the pack battery, and this battery module or pack comprising a battery module case that is applicable to automated operation, the battery modules, these battery module including the same.
Problem solving means
[12]
In one example of the present application, the present application relates to a battery module case used in the battery module.
[13]
1 is a perspective view of one of the lower plate (10a) and four side walls (10b) of the box form an exemplary battery module case 10 comprising a. The battery module case can accommodate the internal space is the resin layer and the plurality of battery cells, and form an internal space by the lower plate (10a) and four side walls (10b). The battery module case 10 may further include a top plate (10c) for sealing the inner space. The term, "top plate" and "bottom plate" may be used interchangeably in accordance with the reference direction.
[14]
The battery module case of the present application can be formed by assembling a bottom plate and side wall may be formed by a one-piece, each separate bottom plate, side walls and / or top plate. The shape and size of the module case is not particularly limited and may be suitably selected in accordance with the use object, etc., type and number of battery cells to be received in the internal space of the module case. The lower plate (10a), side walls (10b) or the top plate (10c) are, for example, the light non-transmissive is formed of a metallic material such as stainless steel can not light is transmitted. Light-impermeable & quot; means any of a transmittance of light of a wavelength of more than about 10%, less than 5%, less than 3% or no more than about 1%.
[15]
Figure 2 is illustrated comprising a lower plate (10a), side walls (10b), the control hole (20b), the injection hole (20a) and a light-transmitting film 30 which is located in the control hole (20b) formed in the lower plate formed in the lower plate of a cross-sectional view of the battery module case 10.
[16]
(May be referred to below, bottom plate, etc.) the bottom plate of the battery module case, the side walls and / or top plate in the present application has a control hole (20b). At this time, the form of the control holes, the number and position may be adjusted in consideration of the kind of the resin composition, doses, such as injection of holes forming position or control efficiency.
[17]
Battery module is formed into the resin layer is thin when the resin composition is insufficient to injection, and thus the stability of the battery module is reduced can be a defect easily occurs in the electrical connection between the battery cell due to external vibration. In addition, the resin composition is discharged when the resin composition is excessively injected can be the quality and productivity of the battery module decreases.
[18]
In one embodiment, the control hole (penetration hole or light transmitting holes) of the battery module case can be formed through the like light non-permeable bottom plate, the light of an arbitrary wavelength can be transmitted through the control hole. Thus, the observer, the observer or detector may be observed because the resin composition is injected into the battery module case through the penetration holes can check facilitate injection amount of the resin composition.
[19]
The battery module case 10 includes a light-transmitting film (30). Type, shape, number and position of the light-transmitting film may be adjusted in consideration of the control hole. The light-transmitting films in one example may be located in the control hole. In this specification, the light-transmitting film that is located in the control hole is a light-transmitting film or attached to the control hole position may mean that to be formed on the control hole. As an example, the light-transmitting film may be beyond the control hole size formed in the bottom plate or the like may be located in the form covering the control hole or control holes formed according to the size. On the other hand, the light-transmitting film may face the external control hole, located in both the inner surface or both surfaces. The adhesion surface of the light-transmitting film can be appropriately adjusted depending on the type of the light-transmitting film, which will be described later.
[20]
The light-transmitting film is transmitted through the light transmitted through the control hole (or penetration holes). Thus, the observer, the observer or detector can be found to facilitate the injection amount of the resin composition it is possible to observe the resin composition is injected into the battery module case through the penetration holes and the light-transmitting film. Therefore, even according to the different size and arrangement of the plurality of battery cells tolerances that may occur in the interior space different from each battery module light-transmitting film, and enables the injection of the resin composition in amount, can be mass-produced the battery module in an automated process, so.
[21]
How to determine the injected amount of the resin composition is not particularly limited, and can be confirmed by direct method or indirect method. It means to make a straightforward method can refer to determine the injected amount of the resin composition by a resin composition is injected into the battery module. Receiving the light as an example a detector or observer, which is reflected by the resin composition is injected into the battery module may determine the injection amount of the resin composition. On the other hand, means to determine the indirect methods may indicate to determine the injected amount of the resin composition by a factor other than the resin composition is injected into the battery module. As an example the detector or observer can see the injection amount of the resin composition by the observation of the detecting component of the light-transmitting film.
[22]
The term "light-transmitting" as used herein is a term in contrast with the "light-impermeable", that the transmittance of light having any wavelength greater than or equal to about 60% or more, 70% or more, 80% or more or about 90% it means. Wherein any wavelength, for example, about 1 nm to include about 1mm of the wavelength, and the light can mean an ultraviolet, visible, infrared, or light of a very high frequency region, including a laser light and more particularly can do.
[23]
Can also be a light-transmitting film of the present application, the control light passing through the hole is transmitted through but to prevent the entry of the material through the control hole. That is, the light-transmitting film can be prevented from being leaked to the external space, the resin composition of the battery module case through the control holes are formed on or attached to the control hole positioning hole. Since the resin composition is a fluid having a constant viscosity before the curing, even after making sure that the observer is injected to the resin composition is a controlled-hole can flow to continue by inertia. In this case, some of the resin composition is controlled through the hole outlet to the outside may result in a defective product. A light-transmitting film may also foreign matter such as dust through the hole in the process control to prevent the injection into the inner space of the battery module case.
[24]
On the other hand, the bottom plate or the like of the battery module case may have an additional hole is formed in addition to the control hole. The hole may be a through-hole (or injection holes) it can be injected into the bottom plate or the like is formed through a resin composition. At this time, the injection hole type, number, and location can be adjusted in consideration of the injection efficiency of the resin composition.
[25]
The battery module case may be thermally conductive case. The term thermally conductive casing, in the entire case or a thermal conductivity above 10 W / mk, and means or a case having at least having a heat conductivity as described above, the thermally conductive regions. For example, at least one of the aforementioned side walls, bottom plate and the top plate may have the thermally conductive regions. In another example may include the thermally conductive regions in areas in contact with the bottom plate and the side wall is a resin layer. In the thermal conductivity are, in another example about 20 W / mk or more, 30 W / mk or more, 40 W / mk or more, 50 W / mk or more, 60 W / mk or more, 70 W / mk or more, 80 W / mk or more, 90 W / mk or more, 100 W / mk or more, 110 W / mk or more, 120 W / mk or more, 130 W / mk or more, 140 W / mk or more, 150 W / mk or more, 160 W / mk or more, 170 W / mk may be at least, 180 W / mk, at least 190 W / mk or about 195 W / mk. The thermal conductivity is higher the value, so that the glass in terms of heat dissipation characteristics of the module, and the upper limit thereof is not particularly limited. In one example, the thermal conductivity of about 1,000 W / mK or less, 900 W / mk or less, 800 W / mk or less, 700 W / mk or less, 600 W / mk or less, 500 W / mk or less, 400 W / mk or less, 300 W / mk or about 250 W / mK or less, but not be limited thereto. Type of material exhibiting thermal conductivity as described above is not particularly limited, for example, iron, aluminum, gold, silver, the metal material of tungsten, copper, nickel, platinum or an alloy containing these or the like.
[26]
In addition, the thermally conductive region may be, parts in contact with the cooling medium such as cooling water. With such a structure may be a structure capable of emitting to the outside heat generated from the battery cells effectively implemented.
[27]
On the other hand, when the measured temperature is out of physical properties referred to herein affecting its physical properties, unless specifically stated otherwise, the physical properties may be the properties measured at room temperature. The term ambient temperature in the present specification is, for any one of a temperature, for example in the range of about 10 to about 30 ℃ ℃, can refer to about 25 ℃, 23 ℃ or temperature of about 20 ℃.
[28]
Figure 3 is a plan view of an exemplary bottom plate formed with a injection hole (20a) and the control hole (20b).
[29]
In the battery module case of this application the injection hole (20a), can be formed on the side wall, the bottom plate or top plate. The injection hole position (Q) may be formed to about 1/4 to about 3/4 or about 3/8 to about 7/8 point or points about the intermediate portion of its length, such as the lower plate. By injecting resin composition through injection holes formed in the point, it is possible to shorten the injection time of the resin composition, the resin composition can be uniformly introduced into the battery module. In embodiments the resin injected through the injection hole (20a) is injected along the axis of injection (or moving) direction of the resin y.
[30]
About 1/4, 3/4, 3/8, or about 7/8 of the points are, the lower plate, such as measured by any standard one end surface (E), such as lower plate full length (L) against the injection hole of the ratio of the distance (a) to the forming position. In addition, the terminal that is the length (L) and the distance (A) is formed from the above, the length (L) and the distance (A) can be a single random words which measures from the same terminal.
[31]
On the other hand, there may be control hole (20b) in the battery module case of the present application, is formed on the bottom plate or side wall. Position and the control hole (P) is to be be formed at the point that satisfies the general formula 1.
[32]
[Formula 1]
[33]
1/50 ≤ P = B/L ≤ 1/2
[34]
Wherein in formula 1, P denotes a positioning hole formed in the bottom plate or side wall, L denotes the total length of the bottom plate or side walls is measured by any of the end face (E) of the bottom plate or side wall, B is the At the end cross-section shows the distance to the control hole.
[35]
That is, 1/50 to 1/2 point, the ratio of the distance (B) of the lower plate, or any of the total length of the bottom plate or side walls is measured by the end surface of the side wall (L) compared to the control hole forming position . End with a length (L) and the distance (B) is formed in the above step is, the length (L) and the distance (B) can be a single random words which measures from the same terminal.
[36]
Position (P) and the control hole may be formed in consideration of the injection hole position (Q), about 1/50, 1/40, 1/30, 1/20, or about 1/10 to about 1/5 point, / 14, it may be formed at the point of 1/3 or about 1/2. For example, if the injection of holes formed in the position of about 1/2, the hole position control may be formed in about 1/50 point. Furthermore, position control when the hole injecting hole formed in the position approximately 7/8 points may be formed in the about 1/8 point. Furthermore, position control when the hole injecting hole formed in the position of the point about 1/8 and about 7/8 can be formed to about 1/2. Thus, a control hole forming position (P) to precisely control the proper amount of resin to be injected, if that satisfies the general formula 1.
[37]
Forming positioning holes may be formed in the injection hole formation position and the maximum distance of the lower plate, etc.. However, control hole position may be adjusted in consideration of the kind of the resin composition, the injection amount, the control efficiency. By forming the control hole to the point it is possible to determine the injected dose of the resin composition to be injected through the holes efficiently.
[38]
In one example, a plurality of control holes can be formed to be arranged in any direction. Specifically, a plurality of control holes can be arranged along the direction perpendicular to the moving direction of the above-described resin (y axis) x. The term, "vertical," as used herein does not mean only in the vertical mathematical sense. Days, for example, "vertical" is meant that each of the y-axis and x-axis forms about 70 ° to about 120 °, about 80 ° to about 110 °, about 85 ° to about 105 °.
[39]
A light-transmitting film in the battery module case of the present application is not in an external device that can pass through the inner space has the shape, the arrangement and materials particularly limited through a light control hole of any wavelength.
[40]
In relation to the arrangement of the light-transmissive film, for example, if one or more control holes provided, and the respective light-transmitting film corresponding to each of the control holes can be formed, a light-transmitting one or more of the covering both the control hole It may also be a film former.
[41]
That is, in one embodiment, when a plurality of control holes are arranged in a form in an arbitrary direction, a light-transmitting film may be formed extending along the arrangement direction of the control hole. Specifically, when a plurality of control holes the direction of movement (y axis) of the aforementioned resins arranged along the x-axis direction perpendicular to a light-transmitting film may be formed extending along the x-axis. In this case, the light-transmitting film can be a dam (dam) or a stopper (stopper) act to prevent movement resin composition is beyond the control holes in the y-axis direction.
[42]
The light-transmitting film 30 has been described, and may include an adhesive layer formed on the substrate, the substrate and the adhesive layer are each a light-transmitting.
[43]
The substrate with a polymeric film form having flexibility and durability, can be selected from materials having a high tensile strength. For example, the base material is polyethylene or a polyolefin such as polypropylene, polyethylene terephthalate or polybutylene polyester such as terephthalate, polyvinyl chloride, polystyrene, polyurethane, polycarbonate, polyamide, polyimide, poly (meth) Although acrylic acid, polybutene, and poly least one selected from the group consisting of thien-butanone, without being limited thereto.
[44]
An adhesive layer formed on the substrate may comprise a material having an adhesive property to the substrate is attached to the battery module case. For example, the adhesive layer may be a film formed from the adhesive may be formed by coating on the acrylic, polyester-based, polyurethane-based, rubber-based, silicone-based or epoxy-based adhesive to the substrate, or the adhesive adhered to the substrate forms.
[45]
The adhesive layer, there can be attached to the control hole location. Being attached to the control hole position may mean that the adhesive layer attached to the place under the control of holes formed in the lower plate position, and may be attached to any one or more positions of the outer surface or the inner surface of the lower plate, the adhesive layer is covering the control hole or attached to the form, it may be attached to the periphery of the control hole. The adhesion surface of the adhesive layer may be properly adjusted according to the type of the light-transmitting film, which will be described later.
[46]
In one example of the present application, the haze of the adhesive layer may be up to about 60%. The haze value may be 55% or less, 50% or less, 45% or less, 40% or less, 35% or about 30% less, at least about 5% or more, 10% or more or about 15%. When the haze of the adhesive layer satisfies the above range, it is possible to suppress the light is reflected from the surface of the substrate, it is possible to reduce the error in the detector due to the light reflection it is possible to lower the defect rate when applied to an automated process. Further, if the haze of the adhesive layer satisfies the above range, it is also possible to prevent the light reflected by the surface of the battery module case.
[47]
The light-transmitting film, and the like In addition, the detection means and the antireflective means.
[48]
Figure 4 shows the light-transmitting film having a detecting means by way of example. A light-transmitting film in the present Example 301 is composed of an adhesive layer 32 formed on a portion on the substrate 31 and the substrate. The substrate is divided into some areas, the adhesive layer (31b) and the adhesive layer 32, other regions (31a) are not formed (32) is formed, the adhesive layer 32 can be attached to control the hole inner surface. The partial area (31b) and the other region (31a) can be bent at a predetermined angle. The partial area (31b) and the other region (31a) may have different optical properties. For example, a partial area (31b) has a transparent optical property of a colorless and the other region (31a) by may have the optical properties of the non-ferrous including a detectable component (33).
[49]
If the light-transmitting film 301 is in contact with the control hole through the transparent adhesive layer 32 before the resin composition is injected into the viewer, a detector or observer partial area (31b having a transparent adhesive layer 32 and a transparent optical property of colorless ) it can be observed through the internal battery module case from the outside. When the resin composition is injected into the other region (31a) of the base are bent in a partial area (31b) the direction can be covered by adding a control hole. In this case, the observer, the detector or observer may observe the detection component (33) included in the partial area (31b), it can be manually or automatically stops the injection of the resin composition.
[50]
Component that is detectable by the detector if optical detection is possible ingredients are not particularly limited. It can be used such as a pigment or a dye component as a possible component detection as an example.
[51]
It is possible that the substrate comprises a component is detected, or if the detectable component comprises a one-component to form the base material, and wherein the detectable component means formed on the substrate. A method of forming a component capable of detecting on a substrate may be used a known method such as to form to form is impregnated with a component capable of detecting a substrate or applying a component capable of detecting on a substrate.
[52]
Figure 5 is another example of the light-transmitting film (302, 303) to the substrate comprises an absorbent component (34) to absorb any wavelength of light. The light transmissive film 302 is formed on the substrate 31 and the base material 31 is composed of an adhesive layer 32 formed on the adhesive layer, the light-absorbing component 34, the reverse side of the substrate a substrate formed. In another example, the light transmissive film 303 is composed of an adhesive layer 32 formed on the base material 31 and the substrate 31, a light-absorbing component 34 is included as a component of forming the base material. Adhesive layer 32 of the light-transmitting film (302, 303) may be attached to any one or more positions of the outer surface or inner surface control hole.
[53]
On the other hand, any wavelength of light can be irradiated into the inner space through the hole into the control region 35 of the substrate that does not contain a light-absorbing component (34). In this case can be a variety of light reflected by the peripheral control hole by a metallic battery module case surface, such light reflections can degrade the detection accuracy of light passing through the control hole. Therefore, the substrate is to increase the partial area, or control holes if it contains a light-absorbing component (34) in the area around the battery case surface light detection accuracy through the control hole to prevent the light reflected from not cover the control hole .
[54]
If in any of the wavelength of light may be irradiated by a light emitter such as an infrared, visible or ultraviolet light, to the light-receiving part at least the irradiation light is not particularly limited, and for example may use a laser.
[55]
The absorbent component may be a water-absorbent component capable of absorbing component is not particularly limited in the functionality of the light anti-reflection, to absorb a variety of light including the light emitted from the light emitter. For example, the absorbent component can be used, such as pigment or dye components.
[56]
It means that the base material comprises an absorbent component to absorb any wavelength of the light, or when the absorbent component contained in one component to form a base material, and the absorbent component is formed on the substrate means. A method of forming an absorbing component on a substrate may be used a known method such as that formed by applying an absorbing component on the substrate or formed by impregnating an absorbent component to the substrate.
[57]
Figure 6 is another example of a light-transmissive film 304 is formed an anti-reflection film 36 in the anti-reflection means on the substrate. In Figure 6 the light transmitting film 304 may be of a reflective film 34 formed on the opposite side of the substrate an adhesive layer 32, formed of an adhesive layer formed on a part or entire region of the substrate, the substrate. On the other hand, the adhesive layer 32 of the light transmissive film 304 may be attached to any one or more positions of the outer surface or inner surface control hole.
[58]
By the anti-reflection film it can prevent the light reflected by the surface the battery case, thereby increasing the detection accuracy of the light passing through the control hole.
[59]
The anti-reflection film means is a refractive index of a film to help ensure that light is transmitted without being reflected or absorbed at the interface between two different media. A formation method of the reflection prevention film, the sputtering (sputtering), but the process can be used, not limited thereto can be formed using a known method. The anti-reflection film may be formed on all or a part of the base material.
[60]
The present application is also directed to a battery module.
[61]
The battery module of the present application includes a battery module case comprising a light-transmitting film which is located in the control hole and the control holes formed in the bottom plate, the side walls, the bottom plate or the side wall; Battery cells; And it may include a resin layer.
[62]
In embodiments where the bottom plate or the side wall of the battery module case may include a further injection holes. The resin composition is injected to form a resin layer of the bottom plate or the side wall through the injection hole.
[63]
The battery module case that is included in the battery module of the present application specific description thereof the same as the battery module case of the present application described above will be omitted.
[64]
The battery module of the present application includes a further battery cell. The term battery cell in the present application, including the electrode assembly and the casing means a unit composed of a secondary battery.
[65]
Figure 7 is a perspective view schematically showing the configuration of the separation exemplary pouch-shaped battery cell, Figure 8 is a perspective view showing coupling of the pouch-type battery cell in FIG.
[66]
The type of the battery cell accommodated in the battery module case is not particularly limited, and can be applied to all of the various battery cells known in the art. The battery cells in one example can be of the pouch. Pouch-shaped battery cell 50 may typically include an electrode assembly 51 and the pouch exterior material 52.
[67]
The pouch-type electrode assembly contained in the battery cell 50, 51, may be at least one positive and one negative electrode plate with a separator arranged between the forms. The electrode assembly 51 is a single or a wound type winding with a positive electrode plate and a negative plate the separator, it can be divided into a plurality of positive electrode plates and a plurality of negative electrode plate is placed a separator between the laminated alternately stacked and the like.
[68]
The pouch exterior material 52 is, for example, may be of a type having an external insulating layer, a metal layer and an inner adhesive layer. The packaging material 52 is to protect the internal components such as the electrode assembly 51. Casing 52 is a metal layer of the electrode assembly 51 may include a metal thin film of aluminum or the like in view of the complementarity, such as heat radiation and for the electrochemical properties of the electrolyte. This metal thin film can be interposed between the insulating layer formed of an insulating material to ensure electrical insulation.
[69]
In one example of a packaging material 52 may comprise an upper pouch (52a) and a lower pouch (52b), at least one of the upper pouch (52a) and a lower pouch (52b), the inner space of the concave form (I) is It can be formed. The inner space (I) of this pouch has an electrode assembly 51 can be housed. The outer peripheral surface of the upper pouch (52a) and a lower pouch (52b) is provided with a sealing part (S), such a sealing part (S) is adhered to each other, the electrode assembly 51 is accommodated in the internal space can be closed.
[70]
And each electrode plate of the electrode assembly 51 is provided with the electrode tab, the at least one electrode tab may be connected to the electrode lead. Lead electrode may function as the electrode terminals of the pouch by being exposed to the outside of the upper (52a) and a lower pouch is interposed between the sealing part (S) of (52b) casing 52, a battery cell 50.
[71]
The surface of the battery cell, for example, a pouch exterior material 52 may comprise an absorbent element (50a) for absorbing light of any wavelength. Of the arbitrary wavelength light can be irradiated by the light emitter such as an infrared, visible or ultraviolet light, as long as they can be received by a part of the irradiated light, at least a detector, not particularly limited, and for example you can use a laser have.
[72]
It said absorbent component is not particularly limited if the absorbent component that has the ability of an optical anti-reflection, the light emitted from the light emitter may be an absorbing component capable of absorbing the reflected light reflected by the surface of the battery cell. For example, the absorbent component can be used, such as pigment or dye components.
[73]
Light passing through the control hole by the surface of the battery cell is configured of a metal material such as aluminum may be light is reflected, which serves to drop the light detecting accuracy. The light absorbing component included in the pouch packaging material is to prevent the light reflected by the surface of the battery cell, it is possible to increase the detection accuracy of the detector.
[74]
It may include the absorbing component in all or part of the surface of the pouch casing. It means that all or part of the surface of the pouch exterior material comprises an absorbent component to absorb any wavelength of light, wherein the absorbent component is included or as a component for forming the surface of the pouch casing, or said absorbent component formed on the pouch exterior or it means for attaching an adhesive tape containing a water-absorbent component to absorb any wavelength of light on the pouch exterior. A method of forming the absorbent element on the pouch exterior may be formed by a known method such as that formed by impregnating an absorbing component in a pouch or packaging material formed by applying an absorbing component on the pouch exterior.
[75]
In the form of a pouch-shaped cell it is an illustration, not a battery cell used in the present application be limited to the type as described above. All this application the various forms of the pouch-shaped cells known or other types of cells can be applied as a battery cell.
[76]
The battery module of the present application includes a resin layer. The term resin layer in the present application, a layer containing a resin component, the resin layer in one example, the adhesive may be a layer.
[77]
Figure 9 is an illustrative cross-sectional view of the battery module, for example, the module, a battery module case comprising an injection hole (20a) and the control hole (20b) the lower plate is formed (10a) and a side wall (10b); A plurality of battery cells housed inside the case 50; And it may be in the form that includes a resin layer 40 is in contact with both the battery cell 50 and the case. The lower plate is in contact with the resin layer 40 in the structure or the like may have a thermally conductive region.
[78]
In the contact, to mean a thermal contact, the contact is, or to which the resin layer directly contacts with the bottom plate, or, for other elements, for example, between, such as the resin layer and the lower plate, below the insulating layer, etc. It is present, but may refer to a state that is not interfering with the heat transfer to the lower plate, such as that from the other elements to the resin layer. It does not interfere with the transfer of heat from the other elements in between, such as the resin layer and the lower plate (ex. An insulating layer) that is, even if present, the other elements and the total thermal conductivity of the resin layer is approximately 1.5 W / mK or more, 2 W / mK or more, 2.5 W / mK or more, 3 W / mK or more, 3.5 W / mK or more, or about 4 W / mK or more, or, or all of, such as the bottom plate in contact with the resin layer and that even though the thermal conductivity of the other component means the case included in the range. The thermal conductivity of the thermal contact is about 50 W / mK or less, 45 W / mk or less, 40 W / mk or less, 35 W / mk or less, 30 W / mk or less, 25 W / mk or less, 20 W / mk or less, 15 W / mk or less, and is equal to or less than 10W / mK or less, 5 W / mK or less, 4.5 W / mK or less, or about 4.0 W / mK. This thermal contact is, if the other element is present, can be achieved by controlling the thermal conductivity and / or thickness of the other element.
[79]
The resin layer, may also be in contact also with the battery cell. Contact of the battery cell and a resin layer is also the above-described thermal contact. While still present application the reduction through the adoption of the structure as a general battery module, or a cooling equipment of a variety of fasteners or modules that were required for existing at the time of configuration of a battery pack assembly of such modules, such as a widespread, to secure heat radiation qualities , it may implement a storage module that many more battery cells per unit volume. Accordingly, more compact in the present application, lightweight and can provide a high-output battery module.
[80]
Contact area, such as the resin layer and the lower plate has, at least about 70% compared to the total area, such as the lower plate, at least 75%, at least 80%, 85% or more, may be at least 90% or at least about 95%. The upper limit of the contact area is not particularly limited, and for example, may be less than about 100% or about 100%.
[81]
The contact area may be a bottom plate, etc. In this case comprises a thermally conductive portion has a contact area, that is the ratio of the thermally conductive portion of the total area of ​​the thermally conductive portion.
[82]
The bottom plate having the heat-conductive areas, and may be a contact area with the cooling medium such as cooling water. That is, as shown 9 schematically shown as a, and the heat (H) by the structure as described above can be easily discharged to the like bottom plate, sikimeuroseo contact this lower plate, such as the cooling medium (CW), a simplified structure even more so that the heat can be released easily.
[83]
The resin layer is, for example, range from about 100 ㎛ to about 5 mm within the range or about 200㎛ to about 5 mm of the can tomorrow. When the resin layer in the thin structure of the present application, since the glass in the insulation characteristics of the glass, and the thick side in the heat dissipation characteristics will be described later, it can be set to an appropriate thickness in consideration of this point. The thickness, the number of the thinnest portion of the thickness of the resin layer, can be the thickest part thickness or an average thickness of.
[84]
Can material, that is, the resin composition forming the resin layer may be adhesive material, may also be of the solvent type, water-based or solvent-free. Further, the resin composition may be an active energy ray curing type, moisture curing type, thermosetting type or room temperature curing type.
[85]
The resin layer may include a filler in consideration of the thermal conductivity, insulating property, heat resistance (TGA analysis) or specific gravity and the like. Through the use of a suitable filler can be secured, such as the thermal conductivity of the above-mentioned range. In one example of the filler may be a thermally conductive filler. The term thermally conductive filler in the present application, refers to a thermal conductivity of about 1 W / mK or more, 5 W / mK or more, more than 10 W / mK, or from about 15 W / mK or more fillers. The thermal conductivity of the thermally conductive filler may be up to about 400 W / mK or less, 350 W / mK or less, or about 300 W / mK. The type of thermally conductive filler that can be used is not particularly limited and may be applied to a ceramic filler in consideration of the insulating property and the like. For example, a ceramic particle such as alumina, AlN (aluminum nitride), BN (boron nitride), silicon nitride (silicon nitride), SiC, ZnO, or BeO may be used. Also, if the insulating characteristic of the resin layer can be ensured, the application of carbon fillers such as graphite (graphite) may also be considered.
[86]
Form or content of the filler contained in the resin layer is not particularly limited, and considering also sedimentation potential, it is an object thermal conductivity naejineun heat resistance in the viscosity number of the resin composition, the resin layer, insulating, filling effect or dispersibility including selection It can be. In general, the larger the size of the filler is more likely to settle in the filler increases the viscosity of the resin composition, the resin layer. In addition, the smaller size tends to have higher heat resistance. Therefore, in consideration of the point described above, and a filler of the appropriate kind may be selected, it is also possible to use two or more kinds of fillers as required. Further, in consideration of the amount to be filled it is to use a spherical filler of glass, but may also be used in consideration of the form or the form of a network of conductive fillers, such as needle-shaped or plate-shaped. The resin layer in one example has an average particle diameter may include a thermally conductive filler in a range from about 0.001 to about 80 ㎛ ㎛. The average particle size of the filler is at least about 0.01 ㎛ or more, 0.1 or more, or more 0.5㎛, more than 1 ㎛, over 2㎛, over 3㎛, 4㎛ over, or approximately over 5㎛ 6㎛ In other instances. The average particle size of the filler is less than or equal to about 75㎛ In another example, 70㎛ hereinafter 65㎛ hereinafter 60㎛ hereinafter 55㎛ hereinafter 50㎛ hereinafter 45㎛ hereinafter 40㎛ hereinafter 35㎛ hereinafter 30㎛ or less, 25㎛ hereinafter 20㎛ hereinafter 15㎛ or less, and is less than or about 10㎛ 5㎛ less.
[87]
Ratio of the filler contained in the resin layer, can be selected in consideration of the characteristics of the resin layer. For example, the filler, the resin component of the resin 100 parts by weight of the preparation can be included in the range from about 50 to about 2,000 parts by weight. By weight of said filler portion to about 100 parts by weight In another example parts or more and 150 parts by weight or more and 200 parts by weight or more and 250 parts by weight or more and 300 parts by weight or more and 350 parts by weight or more and 400 parts by weight or more and 500 parts by weight or more, 550 It may be greater than or equal to parts by weight or more and 600 parts by weight or more or about 650 parts by weight.
[88]
The resin layer, adjustment of the viscosity as necessary, for example, for viscosity control in accordance with the or a shear force in order to increase the viscosity or or lower viscosity agent, e.g., thixotropy imparting agent, a diluent, a dispersant, a surface treatment agent or coupling It may contain an additional agent. The resin layer may include any of the components of one or two or more kinds.
[89]
The battery module of the present application, may further include an insulating layer between the battery module and the battery cell case or between the resin layer and the battery module case in an illustration. It is possible to prevent problems such as cells and the electrical short circuit phenomenon or fire due to contact of the casing of the impact that can occur during use by the addition of an insulating layer. The insulating layer can be formed by coating naejineun of material having a high insulating property and thermal conductivity of the insulating insulation formed from a sheet, or with injection. For example, a process of forming an insulating layer before the injection of the resin composition in the production method of the battery module, which will be described later can be performed. Forming the insulating layer may be applied include so-called (Thermal Interface Material) TIM. In another method the insulating layer is bonded may be made of a material, for example, it may be the content of the filler such as the thermally conductive filler with little or no use of the resin layer to form an insulating layer. A resin component which can be used in the formation of the insulating layer, an acrylic resin, PVC (poly (vinyl chloride)), olefin resin, epoxy resin, silicone, or such as PE (polyethylene), EPDM rubbers ((ethylene propylene diene monomer rubber) Although such rubber component, such as may be illustrated, but is not limited to the insulating layer, a dielectric breakdown voltage of about 5 kV / mm or more measured according to ASTM D149, 10 kV / mm or more, 15 kV / mm or more, 20 kV / mm may be at least, 25 kV / mm or at least about 30 kV / mm. the dielectric breakdown voltage is not the figure is high, more particularly restricted to exhibit excellent insulating property. For example, the dielectric breakdown voltage of the insulating layer may be up to about 100 kV / mm or less, 90 kV / mm or less, 80 kV / mm or less, 70 kV / mm or less, or about 60 kV / mm. The thickness of the insulating layer is in consideration of the insulating property and thermal conductivity of the insulating layer can be set in an appropriate range, e.g., about 5㎛ disorders, 10㎛, over 20㎛, over 30㎛, 40㎛ above, 50㎛ disorders, 60㎛, over 70㎛, over 80㎛ or can be on the order of more than at least about 90㎛. In addition, the upper limit of the thickness is also not particularly limited, and for example, may be up to about 1 mm or less, or less 200㎛, 190㎛ below, 180㎛ below, 170㎛ than, or less than about 160㎛ 150㎛.
[90]
The present application also relates to a battery pack including the battery pack, for example, two or more of the foregoing battery module. The battery modules in the battery pack can be electrically connected to each other. 2 how to configure the battery pack to electrically connect the one or more battery modules are not particularly limited and may be applied to both a known manner.
[91]
The present application also relates to a device including the battery module or the battery pack. Examples of the apparatus but include an automobile such as an electric car, but not limited to, may be included in all applications that require the output to the secondary battery. For example, the method of using the battery module or a battery pack configured for the motor vehicle is not particularly limited, and a general method may be used.
Effects of the Invention
[92]
The battery module case of the present application, the tolerance generated in a battery module provided with a light-transmitting film, even if different from each battery module, it is possible to easily determine the injected amount of the resin composition, and to enable mass production of the battery module in an automated process. In addition, the module case of the present application can be prevented from overflowing through the hole controlled by the resin composition comprising a light-transmitting film.
[93]
In addition, the battery module of the present application, the mass production is possible by an automated process, it is possible to reduce production costs and reduce production time. In addition, the battery module of the present application can be stored per unit volume is large battery cells, can be a high output can be produced while a small size, and light weight.
Brief Description of the Drawings
[94]
1 is a perspective view illustrating an exemplary battery module case of the present application.
[95]
2 is a cross-sectional view of an exemplary battery module case that is formed in the injection hole, a control hole and the light-transmitting film is the lower plate.
[96]
Figure 3 is a plan view of an exemplary bottom plate formed with a hole injection and the control hole.
[97]
4 is a cross-sectional view showing the light-transmitting film having a detecting means.
[98]
Figure 5 is a cross-sectional view of an exemplary light-transmitting film containing a water-absorbent composition that absorbs light to the substrate.
[99]
Figure 6 is a cross-sectional view illustrating another exemplary light-transmitting film formed of the antireflection film to the substrate.
[100]
7 and 8 are perspective views showing an exemplary battery pouch which can be used as a battery cell.
[101]
9 is a cross-sectional view showing the structure of an exemplary battery module.
Mode for the Invention
[102]
Hereinafter, description will be given of an embodiment and comparative examples, but is not limited by the scope set forth the scope of the present application.
[103]
[104]
Assessment Methods
[105]
[106]
[107]
Fairness
[108]
If the injected amount of the resin composition injected into the battery module case can not be confirmed from the outside or the resin composition is injected into the battery module case is discharged through the control hole, etc. are evaluated as non-secure fairness suitable for automated processes It was.
[109]
[110]

[111]
○: where appropriate, to apply an automated process
[112]
X: If unsuitable for automated process applications
[113]
[114]
[115]
Example
[116]
The injection holes and a control hole housing a plurality of battery cells in the battery module case is formed in the lower plate, which was attached to the light-transmitting film to control the hole. After mounting the light-transmitting film through the injection hole of the resin composition it was injected into the battery module case.
[117]
[118]
[119]
Comparative Example 1
[120]
The injection hole was accommodating a plurality of battery cells in the battery module case is formed in the lower plate, and injecting resin composition through an injection hole into the battery module case.
[121]
[122]
[123]
Comparative Example 2
[124]
Injection hole and the control hole is a resin composition was injected into the battery module case accommodating the plurality of battery cells in the battery module case is formed in the lower plate, and through the injection holes.
[125]
TABLE 1
Fairness
Check or wrong dose Whether a resin composition discharge station
Example ○ ×
Comparative Example 1 × ×
Comparative Example 2 ○ ○

[126]
From Table 1, the battery module case of the present application may confirm that appropriate for an automated process of the battery module. When manufacturing the battery module by applying the battery module case is particular embodiment the light-transmitting film is applied, it is possible to determine easily the injection amount of the resin composition can be prevented also the resin composition is reverse discharge through the control hole .
[127]
On the other hand Comparative Example 1 was unable to determine the injected amount of the resin composition because it is not already formed in the control hole, the comparative example 2 is difficult is to determine readily but can not determine the injected amount of the resin composition through the control hole also implanted the resin composition was discharged through the control hole. Thus Comparative Examples 1 and 2 can be confirmed that the process not suitable for automated application.

Claims
[Claim 1]
Resin layers and a plurality of bottom plate and side walls defining an interior space for receiving the battery cell; Control holes formed in the bottom plate or the side wall; And a battery module case comprising a light-transmitting film which is located to the control hole.
[Claim 2]
The method of claim 1, wherein the lower plate or the side wall includes a battery module case comprising an injection hole injecting the resin composition for forming the resin layer.
[Claim 3]
The method of claim 1, wherein the lower plate or the side wall includes a battery module case having a heat-conductive area in the area in contact with the resin layer.
[Claim 4]
The method of claim 1, wherein the battery module case controlled hole is formed in the lower plate.
[Claim 5]
The method of claim 1, wherein the control hole position (P) to the case for the battery module meets the following formula 1: [Formula 1] 1/50 ≤ P = B / L ≤ 1/2 the general formula (1), P denotes a positioning hole formed in the bottom plate or side wall, L denotes the total length of the bottom plate or side walls is measured by any one of the end surface of the bottom plate or side wall, B is the distance to control the hole with respect to the end face It represents an.
[Claim 6]
The method of claim 1, wherein the light-transmitting film is formed of a battery module case is extended along the direction in which the array of a plurality of control holes.
[Claim 7]
The method of claim 1, wherein the light-transmitting film includes a battery module case comprising an adhesive layer formed on the base material and the base material.
[Claim 8]
The method of claim 7, wherein the adhesive layer includes a battery module case are formed only in a partial region of the substrate.
[Claim 9]
The method of claim 8 wherein the adhesive layer other region of the substrate is that the partial region with the adhesive layer of the substrate is formed is not formed is formed to be bent at a predetermined angle, the battery module having the part region and the other region of the substrate is different from the optical properties of the base material case.
[Claim 10]
The method of claim 7, wherein all or a part of the base material includes a battery module case comprising an absorbent component to absorb any wavelength of light.
[Claim 11]
The method of claim 7, wherein the battery module case, the antireflection film formed on all or a part of the base material.
[Claim 12]
The battery module case comprising a bottom plate and side walls defining an interior space, a control hole formed in the bottom plate or side wall, and a light-transmitting film which is located in the control hole; A plurality of battery cells present in the inner space of the module case; And is present in the interior space of the module case, the battery module comprising a number that is in contact with at least one of the bottom plate or the side of the plurality of battery cell layers.
[Claim 13]
13. The method of claim 12, wherein the lower plate or the side wall includes a battery module comprising a number of injection holes that are injected into the resin composition for forming the resin layer.
[Claim 14]
The method of claim 12, wherein the light-transmitting film is a battery module including the adhesive layer formed on the base material and the base material.
[Claim 15]
13. The method of claim 12, wherein the surface of the battery cell is a battery module including an absorbent component to absorb any wavelength of light.
[Claim 16]
13. The method of claim 12, wherein the resin layer has a thermal conductivity of 1.5W / mK or more battery modules.
[Claim 17]
13. The method of claim 12, wherein the resin layer is a battery module including a filler.
[Claim 18]
Which are electrically connected to each other, 12 to 17, wherein the battery pack including two or more battery modules according to any one of items.
[Claim 19]
Of claim 12 to 17 cars including a battery module according to any one of items.
[Claim 20]
Article 18, paragraph car including the battery pack.