Title of the invention: battery module, battery pack including the same, and automobile
Technical field
[One]
This application is an application for claiming priority for Korean Patent Application No. 10-2019-0024839 filed on March 04, 2019, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
[2]
The present invention relates to a battery module, a battery pack including the same, and a vehicle, and more particularly, to a battery module capable of both cooling and heating, a battery pack including the same, and a vehicle.
Background
[3]
As technology development and demand for mobile devices increase, the demand for rechargeable batteries as an energy source is rapidly increasing, and nickel cadmium batteries or hydrogen ion batteries have been used as secondary batteries in the past, but recently, memory effects compared to nickel-based secondary batteries. Since little occurs, charging and discharging are free, self-discharge rate is very low, and lithium secondary batteries with high energy density are widely used.
[4]
These lithium secondary batteries mainly use lithium-based oxides and carbon materials as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate to which the positive electrode active material and the negative electrode active material are applied, respectively, are disposed with a separator therebetween, and an exterior material that seals and accommodates the electrode assembly together with an electrolyte solution, that is, a battery case.
[5]
Lithium secondary batteries consist of a positive electrode, a negative electrode, and a separator and electrolyte interposed therebetween. , PLIB), etc. Typically, the electrodes of these lithium secondary batteries are formed by applying a positive or negative active material to a current collector such as an aluminum or copper sheet, a mesh, a film, or a foil, followed by drying.
[6]
The behavior of the secondary battery varies depending on the temperature. That is, when the temperature of the secondary battery increases, swelling may occur or explode, and when the temperature of the secondary battery decreases, performance deteriorates and the lifespan is shortened.Therefore, the temperature of the secondary battery is set within a preset range. Need to be kept in.
[7]
However, since the conventional secondary battery is provided so that only either cooling or heating is possible, there is a problem that cannot cope with the situation in which the temperature is changed. That is, for example, in the case of a secondary battery equipped with only a cooling function, if it is used in a cold weather or in an extremely low temperature region, there is a problem that the secondary battery cannot be used smoothly or its life is shortened. The secondary battery also has a problem in that it is difficult to use because swelling or explosion occurs due to heat generated from the secondary battery.
Detailed description of the invention
Technical challenge
[8]
Accordingly, the technical problem to be achieved by the present invention is to provide a battery module capable of both cooling and heating, and a battery pack including the same.
Means of solving the task
[9]
According to an aspect of the present invention, a battery cell stack in which a plurality of battery cells are stacked; A casing surrounding the battery cell stack; And a heat transfer member disposed between any one battery cell of the battery cell stack and another battery cell adjacent to the one battery cell to cool or heat the battery cell, wherein the heat transfer member comprises the battery A battery module may be provided that is installed to be spaced apart from the cell and is in contact with the battery cell to cool or heat the battery cell.
[10]
In addition, the heat transfer member may include a bimetal in which a plurality of metals having different coefficients of thermal expansion are bonded to each other; And a thermoelectric element coupled to at least one of both ends of the bimetal.
[11]
In addition, at least one of a heat sink and a heat sink fan may be coupled to the thermoelectric element.
[12]
In addition, the bimetal may be provided to bend toward the battery cell by convection of heat generated from the battery cell.
[13]
In addition, a first thermoelectric element, which is a Peltier element, may be coupled to one end of the bimetal, and a second thermoelectric element, which is a Peltier element, may be coupled to the other end of the bimetal in a direction opposite to one end of the bimetal.
[14]
In addition, the first thermoelectric element includes a heating part and a heat absorbing part, and the heating part of the first thermoelectric element is coupled to the bimetal, and the heat absorbing part of the first thermoelectric element is spaced apart from the battery cell to increase the temperature of the battery cell. Is provided to be in contact with the battery cell, and the second thermoelectric element includes a heating part and a heat absorbing part, the heat absorbing part of the second thermoelectric element is coupled to the bimetal, and the heating part of the second thermoelectric element is removed from the battery cell. It may be provided to be separated from each other to contact the battery cell when the temperature of the battery cell decreases.
[15]
In addition, a third thermoelectric element or a fourth thermoelectric element, which is a Peltier element, may be coupled to only one end of both ends of the bimetal.
[16]
In addition, the third thermoelectric element includes a heat generating part and a heat absorbing part, the heating part of the third thermoelectric element is coupled to the bimetal, and the heat absorbing part of the third thermoelectric element is spaced apart from the battery cell to increase the temperature of the battery cell. It may be provided to be in contact with the battery cell.
[17]
In addition, the fourth thermoelectric element includes a heating part and a heat absorbing part, the heat absorbing part of the fourth thermoelectric element is coupled to the bimetal, and the heating part of the fourth thermoelectric element is spaced apart from the battery cell to reduce the temperature of the battery cell. It may be provided to contact the battery cell.
[18]
In addition, a plurality of bimetals to which the third thermoelectric element is coupled are provided and disposed between each of the battery cells, and when the temperature of the battery cell increases, the heat absorbing part of the third thermoelectric element contacts the battery cell, and the battery cell When the temperature of is reduced, the bimetal may contact the battery cell so that heat generated from the heating part of the third thermoelectric element may be transferred to the battery cell through the bimetal.
[19]
On the other hand, according to another aspect of the present invention, a battery module including a battery cell stack in which a plurality of battery cells are stacked and a casing surrounding the battery cell stack; And a heat transfer member having a plurality of battery modules and disposed between any one battery module among the plurality of battery modules and another battery module adjacent to the one battery module to cool or heat the battery module. The battery pack may be provided, wherein the heat transfer member is installed to be spaced apart from the battery module and is in contact with the battery module to cool or heat the battery module.
[20]
Meanwhile, according to another aspect of the present invention, a battery pack including the above-described battery module may be provided, and a vehicle including the battery module may be provided.
Effects of the Invention
[21]
In the embodiments of the present invention, the heat transfer member spaced apart from the battery may move toward the battery, thereby enabling both cooling and heating.
[22]
In addition, there is an effect that cooling and heating can be performed simply and easily by the heat transfer member installed to be movable.
Brief description of the drawing
[23]
1 is a schematic perspective view of a battery module according to a first embodiment of the present invention.
[24]
2 is a schematic cross-sectional view of a thermoelectric element spaced apart from a battery cell in the battery module according to the first embodiment of the present invention.
[25]
3 is a schematic cross-sectional view of a state in which a heat absorbing part of a first thermoelectric element is in contact with a battery cell in the battery module according to the first embodiment of the present invention.
[26]
4 is a schematic cross-sectional view of a state in which a heating part of a second thermoelectric element is in contact with a battery cell in the battery module according to the first embodiment of the present invention.
[27]
5 is a schematic cross-sectional view illustrating a state in which a heat sink coupled to a thermoelectric element and a heat sink fan are separated from the battery module according to the first embodiment of the present invention.
[28]
6 is a schematic cross-sectional view of a state in which a third thermoelectric element is spaced apart from a battery cell in a battery module according to a second exemplary embodiment of the present invention.
[29]
7 is a schematic cross-sectional view of a state in which a heat absorbing part of a third thermoelectric element is in contact with a battery cell in a battery module according to a second exemplary embodiment of the present invention.
[30]
8 is a schematic cross-sectional view of a state in which a bimetal is in contact with a battery cell in a battery module according to a second embodiment of the present invention.
[31]
9 is a schematic cross-sectional view of a state in which a heat transfer member is spaced apart from a battery module in a battery pack according to an embodiment of the present invention.
Mode for carrying out the invention
[32]
Hereinafter, with reference to the accompanying drawings will be described in detail according to a preferred embodiment of the present invention. The terms or words used in the specification and claims are not to be construed as limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of ​​the present invention based on the principle that there is. Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical ideas of the present invention. It should be understood that there may be equivalents and variations.
[33]
In the drawings, the size of each component or a specific part constituting the component is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. Therefore, the size of each component does not entirely reflect the actual size. When it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, such description will be omitted.
[34]
The term'coupling' or'connection' as used herein is not only when one member and another member are directly connected or directly connected, but also when one member is indirectly connected to another member through a joint member, or indirectly It also includes cases connected to.
[35]
1 is a schematic perspective view of a battery module according to a first embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a thermoelectric element spaced apart from a battery cell in a battery module according to a first embodiment of the present invention. 3 is a schematic cross-sectional view of a state in which a heat absorbing part of a first thermoelectric element is in contact with a battery cell in the battery module according to the first embodiment of the present invention, and FIG. 4 is a battery module according to the first embodiment of the present invention. Is a schematic cross-sectional view of a state in which a heating part of a second thermoelectric element is in contact with a battery cell, and FIG. 5 is a view showing a state in which a heat sink coupled to a thermoelectric element and a heat dissipation fan are separated in the battery module according to the first embodiment of the present invention. It is a schematic cross-sectional view.
[36]
1 to 5, the battery module 10 according to the first embodiment of the present invention includes a battery cell stack 100, a casing 200, and a heat transfer member 300.
[37]
The battery cell stack 100 is provided so that a plurality of battery cells 110 are stacked. Here, the battery cells 110 may have various structures, and the plurality of battery cells 110 may be stacked in various ways. In addition, the battery cell stack 100 is provided with a plurality of battery cells 110 provided with electrode leads. The electrode lead provided in the battery cell 110 may be a type of terminal exposed to the outside and connected to an external device, and a conductive material may be used. The electrode lead may include an anode electrode lead and a cathode electrode lead. The positive electrode lead and the negative electrode lead may be disposed in opposite directions with respect to the length direction of the battery cell 110, or the positive electrode lead and the negative electrode lead may be in the same direction with respect to the length direction of the battery cell 110. It can also be located. The electrode leads can be electrically coupled to the busbar. The battery cell 110 includes a unit cell arranged in the order of a positive plate-separator-cathode plate or a bi-cell arranged in the order of a positive plate-separator-cathode plate-separator-anode plate-separator-cathode plate. It can have a structure in which a plurality of stacks are stacked according to capacity.
[38]
The battery cell stack 100 may include a plurality of cartridges (not shown) accommodating each battery cell 110. Each cartridge (not shown) may be manufactured by injection molding of plastic, and a plurality of cartridges (not shown) in which a storage unit capable of accommodating the battery cell 110 may be formed may be stacked. A cartridge assembly in which a plurality of cartridges (not shown) are stacked may be provided with a connector element or a terminal element. The connector element may include, for example, various types of electrical connection parts or connection members to be connected to a BMS (Battery Management System, not shown) that can provide data on the voltage or temperature of the battery cell 110. have. Further, the terminal element is a main terminal connected to the battery cell 110 and includes a positive terminal and a negative terminal, and the terminal element may be electrically connected to the outside by being provided with a terminal bolt. Meanwhile, the battery cell 110 may have various shapes.
[39]
A battery cell stack 100 or a cartridge assembly in which the battery cell stack 100 is accommodated may be accommodated in the casing 200. That is, the casing 200 surrounds the entire battery cell stack 100 or a plurality of cartridge assemblies, thereby protecting the battery cell stack 100 or the cartridge assembly from external vibrations or shocks.
[40]
The casing 200 may be formed in a shape corresponding to the shape of the battery cell stack 100 or the cartridge assembly. For example, when the battery cell stack 100 or the cartridge assembly is provided in a hexahedral shape, the casing 200 may also be provided in a hexahedral shape to correspond thereto. The casing 200 may be manufactured, for example, by bending a plate made of a metal material, or may be manufactured by a plastic injection product. And, the casing 200 may be manufactured as an integral type, or may be manufactured as a separate type. The casing 200 may be formed with a through portion (not shown) through which the aforementioned connector element or terminal element may be exposed to the outside. That is, the connector element or the terminal element may be electrically connected to an external component or member, and a through part may be formed in the casing 200 so that the electrical connection is not disturbed by the casing 200.
[41]
The heat transfer member 300 is disposed between any one battery cell 110 of the battery cell stack 100 and the other battery cell 110 adjacent to any one battery cell 110 so that the battery cell 110 To cool or heat. Here, the heat transfer member 300 is installed so as to be spaced apart from the battery cell 110, and when the temperature of the battery cell 110 rises or falls, the heat transfer member 300 contacts the battery cell 110 to thereby connect the battery cell 110. Cool or heat.
[42]
The heat transfer member 300 may include a bimetal 310 and a thermoelectric element 320. Hereinafter, the bimetal 310 and the thermoelectric element 320 will be described. Meanwhile, in the drawings, although shown to be exaggerated for convenience of explanation, the bimetal 310 and the thermoelectric element 320 may have a sufficiently small size, and also, any one battery cell 110 and one battery The spacing between the other battery cells 110 adjacent to the cell 110 may also be formed as small as necessary.
[43]
The bimetal 310 is manufactured so that a plurality of metals having different coefficients of thermal expansion are bonded to each other, and when heat is provided to the bimetal 310 or when heat is released from the bimetal 310, the bimetal 310 is bent. For example, as shown in FIGS. 2 to 4, when heat is provided to the bimetal 310 in which the first metal 311 and the second metal 312 having different coefficients of thermal expansion are bonded to each other, as shown in FIG. 3, FIG. 3 The bimetal 310 is bent to the left based on. In addition, when heat is released from the bimetal 310 in which the first metal 311 and the second metal 312 having different coefficients of thermal expansion are combined with each other, the bimetal 310 is bent to the right with reference to FIG. 4 as shown in FIG. You lose. Here, the bimetal 310 may be provided to be bent toward the battery cell 110 by convection of heat generated from the battery cell 110. In addition, the bimetal 310 may be provided to be bent toward the battery cell 110 due to an external low temperature such as cold weather. For example, heat generated from the battery cell 110 by continuous use of the battery cell 110 moves to the bimetal 310 by convection, and is generated from the battery cell 110 and moved to the bimetal 310. The bimetal 310 may be provided to bend in either direction by heat. In addition, when the weather is cold or the external temperature is low, such as in the polar region, the bimetal 310 may be provided so that heat is generated from the battery cell 110 to bend in a direction opposite to the direction in which the bimetal 310 is bent.
[44]
The thermoelectric element 320 may be provided in various ways, for example, if two types of metal ends are connected and current is passed thereto, the Peltier effect of absorbing heat from one side and releasing heat from the other according to the current direction is achieved. It may be a Peltier device that can be generated. Here, referring to FIG. 5, at least one of a heat sink 400 and a heat sink fan 500 may be coupled to the thermoelectric element 320. Hereinafter, the case where the thermoelectric device 320 is a Peltier device will be described. The thermoelectric element 320 may be coupled to at least one of both ends of the bimetal 310. 2, when the thermoelectric element 320 is coupled to both ends of the bimetal 310, the first thermoelectric element 321 and the second thermoelectric element 322 are coupled to each of both ends of the bimetal 310 Can be. Here, the first thermoelectric element 321 may be coupled to one end of the bimetal 310, for example, to the left side of the bimetal 310 with reference to FIG. 2, and the second thermoelectric element 322 is a bimetal 310 ) May be coupled to the right side of the bimetal 310 based on the other end, for example, FIG. 2 in the opposite direction of the one end. Referring to FIG. 2, the first thermoelectric element 321 includes a heating unit 321a and a heat absorbing unit 321b, and the heating unit 321a of the first thermoelectric element 321 is coupled to the bimetal 310, , The heat absorbing part 321b of the first thermoelectric element 321 may be spaced apart from the battery cell 110 and disposed to face the battery cell 110. And, When the temperature of the battery cell 110 increases as in FIG. 3, when the bimetal 310 is bent to the left of FIG. 3 by heat generated from the battery cell 110, a first thermoelectric element coupled to the bimetal 310 ( It may be provided so that the 321 moves toward the battery cell 110 and the heat absorbing part 321b of the first thermoelectric element 321 comes into contact with the battery cell 110. Accordingly, the heat absorbing part 321b of the first thermoelectric element 321 is in contact with the battery cell 110 of which the temperature has risen to discharge heat of the battery cell 110, thereby cooling the battery cell 110. And, referring to FIG. 2, the second thermoelectric element 322 also includes a heating part 322a and a heat absorbing part 322b, and the heat absorbing part 322b of the second thermoelectric element 322 is attached to the bimetal 310. Combined, the heating part 322a of the second thermoelectric element 322 may be spaced apart from the battery cell 110 and disposed to face the battery cell 110. In addition, when the temperature of the battery cell 110 decreases as shown in FIG. 4, when the bimetal 310 is bent to the right with reference to FIG. 4, the second thermoelectric element 322 coupled to the bimetal 310 becomes the battery cell 110. It may be provided to move to the side and to allow the heating part 322a of the second thermoelectric element 322 to contact the battery cell 110. Accordingly, there is an effect that the heating part 322a of the second thermoelectric element 322 contacts the battery cell 110 with a reduced temperature to transfer heat to the battery cell 110 and heat the battery cell 110. . In this way, when the first thermoelectric element 321 and the second thermoelectric element 322 are coupled to both ends of the bimetal 310 and heat is generated in the battery cell 110, the first thermoelectric element 321 is Cooling the cell 110, When used in cold weather, the second thermoelectric element 322 transfers heat to and heats the battery cell 110, so that the battery module 10 can be used in a preset optimum temperature range, whereby the battery module 10 It has the effect of preventing shortening of the lifespan. Meanwhile, as shown in FIG. 2, for example, the thermoelectric element 320 may be coupled to only one end of the bimetal 310 located at both ends of the bimetal 310. Here, the bimetal 310 to which the third thermoelectric element 323 is coupled may be positioned at the right end of FIG. 2, and the bimetal 310 to which the fourth thermoelectric element 324 is coupled may be positioned at the left end. Can be located. The third thermoelectric element 323 and the fourth thermoelectric element 324 are Peltier elements, and the third thermoelectric element 323 includes a heating unit 323a and a heat absorbing unit 323b like the first thermoelectric element 321 can do. In addition, the heating part 323a of the third thermoelectric element 323 is coupled to the bimetal 310, and the heat absorbing part 323b of the third thermoelectric element 323 is spaced apart from the battery cell 110, so that the battery cell 110 Can be arranged to face ). Here, when the temperature of the battery cell 110 increases, the heat absorbing part 323b of the third thermoelectric element 323 may contact the battery cell 110. In addition, in the fourth thermoelectric element 324, like the second thermoelectric element 322, the heat absorbing part 324b of the fourth thermoelectric element 324 is coupled to the bimetal 310, and the fourth thermoelectric element 324 generates heat. The portion 324a may be spaced apart from the battery cell 110 and disposed to face the battery cell 110. Here, when the temperature of the battery cell 110 decreases, the heating part 324a of the fourth thermoelectric element 324 may contact the battery cell 110. Since the operation of the third thermoelectric element 323 and the fourth thermoelectric element 324 is basically the same as the first thermoelectric element 321 and the second thermoelectric element 322, respectively, the detailed description is for the first thermoelectric element 321 And the above description of the second thermoelectric element 322. On the other hand, it is obvious that both the first thermoelectric element 321 and the second thermoelectric element 322 can be provided in the bimetal 310 located at both ends.
[45]
Hereinafter, operations and effects of the battery module 10 according to the first embodiment of the present invention will be described with reference to the drawings.
[46]
Referring to FIG. 2, based on FIG. 2, a first thermoelectric element 321 is coupled to the left side of the bimetal 310, and a second thermoelectric element 322 is coupled to the right side of the bimetal 310. Here, in the first thermoelectric element 321, the heating part 321a is coupled to the bimetal 310, and the heat absorbing part 321b is disposed to be spaced apart from the battery cell 110. In addition, in the second thermoelectric element 322, the heat absorbing portion 322b is coupled to the bimetal 310, and the heating portion 322a is disposed to be spaced apart from the battery cell 110. When heat is generated from the battery cell 110, the heat generated from the battery cell 110 moves to the bimetal 310 by convection, and the bimetal 310 is bent as shown in FIG. 3, and is coupled to the bimetal 310. The heat absorbing part 321b of the first thermoelectric element 321 is brought into contact with the battery cell 110 to cool the battery cell 110. In addition, when the temperature of the battery cell 110 decreases in cold weather, the bimetal 310 is bent as shown in FIG. 4, and the heating part 322a of the second thermoelectric element 322 coupled to the bimetal 310 is The battery cell 110 is heated by contacting the battery cell 110. And, as shown in FIG. 2, since the heat transfer member 300 is disposed between the plurality of battery cells 110, all battery cells 110 can be cooled or heated, thereby Both cooling and heating are possible effects.
[47]
Meanwhile, in FIG. 2, the first thermoelectric element 321 is coupled to the left side of the bimetal 310, and the second thermoelectric element 322 is coupled to the right side of the bimetal 310, but the first thermoelectric element 321 is bimetallic. It is coupled to the right side of 310, and the second thermoelectric element 322 may be attached to the left side of the bimetal 310.
[48]
6 is a schematic cross-sectional view of a state in which a third thermoelectric element is spaced apart from a battery cell in a battery module according to a second exemplary embodiment of the present invention, and FIG. 7 is a third diagram in the battery module according to the second exemplary embodiment of the present invention. It is a schematic cross-sectional view of a state in which a heat absorbing part of a thermoelectric element is in contact with a battery cell, and FIG. 8 is a schematic cross-sectional view of a state in which a bimetal is in contact with a battery cell in a battery module according to a second exemplary embodiment of the present invention.
[49]
Hereinafter, the operation and effect of the battery module 10 according to the second embodiment of the present invention will be described with reference to the drawings, but a portion in common with the contents described in the battery module 10 according to the first embodiment of the present invention Is replaced by the above description.
[50]
In the second embodiment of the present invention, when the temperature of the battery cell 110 increases, the third thermoelectric element 323 contacts the battery cell 110, but when the temperature of the battery cell 110 decreases, the bimetal 310 becomes the battery cell. It is different from the first embodiment in that it is in contact with (110).
[51]
Referring to FIG. 6, a plurality of bimetals 310 to which only the third thermoelectric element 323 is coupled are provided and disposed between each of the battery cells 110. That is, in the case of the first embodiment, a bimetal 310 in which both the first thermoelectric element 321 and the second thermoelectric element 322 are combined is disposed between the battery cells 110, and the bimetals 310 located at both ends thereof. , For example, based on FIG. 2, a third thermoelectric element 323 is positioned at the right end, and a fourth thermoelectric element 324 is positioned at the left end. However, in the second embodiment, only the third thermoelectric element 323 is coupled to all of the bimetals 310. Here, as shown in FIG. 7, when heat is generated in the battery cell 110 and the bimetal 310 is bent toward the battery cell 110 on the left side based on FIG. 7, the heat absorbing part ( 323b) is in contact with the battery cell 110 to cool the battery cell 110. Since the operation of the third thermoelectric element 323 is the same as described in the first embodiment, the above description is substituted. In addition, when the temperature of the battery cell 110 decreases in cold weather, etc., as shown in FIG. 8, when the bimetal 310 is bent toward the battery cell 110 on the right side based on FIG. 8, the bimetal 310 becomes the battery cell 110. ), and the heat generated from the heating part 323a of the third thermoelectric element 323 is transferred to the battery cell 110 through the bimetal 310. That is, heat generated from the heating part 323a of the third thermoelectric element 323 is transferred to the battery cell 110 through the bimetal 310, thereby heating the battery cell 110. In the case of the second embodiment, compared to the first embodiment, the heating effect may be inferior in cold weather, etc.,
[52]
9 is a schematic cross-sectional view of a state in which a heat transfer member is spaced apart from a battery module in a battery pack according to an embodiment of the present invention.
[53]
Hereinafter, the operation and effect of the battery pack according to an embodiment of the present invention will be described with reference to the drawings, but the descriptions in common with the contents described in the battery module 10 according to the first and second embodiments of the present invention Parts are replaced by the above description.
[54]
In the case of the battery pack according to an embodiment of the present invention, the first embodiment in which the heat transfer member 300 is disposed between the battery cells 110 in that the heat transfer member 300 is disposed between the battery modules 10 And the second embodiment.
[55]
Referring to FIG. 9, a heat transfer member 300 is disposed between the battery modules 10, and the heat transfer member 300 cools or heats the battery module 10. Here, since specific operations and effects of the heat transfer member 300 are common to those of the first and second embodiments described above, the above description is substituted.
[56]
On the other hand, a battery pack (not shown) according to another embodiment of the present invention is a battery module 10 as described above, for example, a battery provided to have a heat transfer member 300 disposed between the battery cells 110 One or more modules 10 may be included. That is, the battery module 10 includes a battery cell stack 100 in which a plurality of battery cells 110 are stacked, and the heat transfer member 300 is disposed between the battery cells 110 as described above. same. In addition, the battery pack (not shown), in addition to the battery module 10, a case for accommodating the battery module 10, various devices for controlling the charging and discharging of the battery module 10, such as BMS, current A sensor, a fuse, and the like may be further included.
[57]
Meanwhile, a vehicle (not shown) according to an embodiment of the present invention may include the aforementioned battery module 10 or a battery pack (not shown), and the battery pack (not shown) includes the battery module 10 May be included. In addition, the battery module 10 according to an embodiment of the present invention is applied to the vehicle (not shown), for example, a predetermined vehicle (not shown) provided to use electricity such as an electric vehicle or a hybrid vehicle. I can.
[58]
In the above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of ​​the present invention and the following will be described by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the equivalent range of the claims.
Industrial applicability
[59]
The present invention relates to a battery module, a battery pack including the same, and a vehicle, and particularly, can be used in an industry related to a secondary battery.
Claims
[Claim 1]
A battery cell stack in which a plurality of battery cells are stacked; A casing surrounding the battery cell stack; And a heat transfer member disposed between any one battery cell of the battery cell stack and another battery cell adjacent to the one battery cell to cool or heat the battery cell, wherein the heat transfer member comprises the battery A battery module, characterized in that it is installed to be spaced apart from the cell and contacts the battery cell to cool or heat the battery cell.
[Claim 2]
The method of claim 1, wherein the heat transfer member comprises: a bimetal in which a plurality of metals having different coefficients of thermal expansion are bonded to each other; And a thermoelectric element coupled to at least one of both ends of the bimetal.
[Claim 3]
The battery module according to claim 2, wherein at least one of a heat sink and a heat sink fan is coupled to the thermoelectric element.
[Claim 4]
The battery module of claim 2, wherein the bimetal is provided to bend toward the battery cell by convection of heat generated from the battery cell.
[Claim 5]
The battery according to claim 4, wherein a first thermoelectric element, which is a Peltier element, is coupled to one end of the bimetal, and a second thermoelectric element, which is a Peltier element, is coupled to an end opposite to one end of the bimetal. module.
[Claim 6]
The battery of claim 5, wherein the first thermoelectric element includes a heat generating part and a heat absorbing part, and the heat absorbing part of the first thermoelectric element is coupled to the bimetal, and the heat absorbing part of the first thermoelectric element is spaced apart from the battery cell. It is provided to contact the battery cell when the temperature of the cell is increased, the second thermoelectric element includes a heating unit and a heat absorbing unit, the heat absorbing unit of the second thermoelectric element is coupled to the bimetal, and the heating unit of the second thermoelectric element A battery module, characterized in that it is spaced apart from the battery cell and provided to contact the battery cell when the temperature of the battery cell decreases.
[Claim 7]
The battery module according to claim 4, wherein a third thermoelectric element or a fourth thermoelectric element, which is a Peltier element, is coupled to only one of both ends of the bimetal.
[Claim 8]
The battery of claim 7, wherein the third thermoelectric element includes a heat generating part and a heat absorbing part, and the heating part of the third thermoelectric element is coupled to the bimetal, and the heat absorbing part of the third thermoelectric element is spaced apart from the battery cell. Battery module, characterized in that provided to contact the battery cell when the temperature of the cell increases.
[Claim 9]
The battery of claim 7, wherein the fourth thermoelectric element includes a heat generating part and a heat absorbing part, and the heat absorbing part of the fourth thermoelectric element is coupled to the bimetal, and the heat generating part of the fourth thermoelectric element is spaced apart from the battery cell. Battery module, characterized in that provided to contact the battery cell when the temperature of the cell decreases.
[Claim 10]
The method of claim 8, wherein a plurality of bimetals to which the third thermoelectric element is coupled are provided and disposed between each of the battery cells, and when a temperature of the battery cell is increased, a heat absorbing part of the third thermoelectric element is in contact with the battery cell. And when the temperature of the battery cell decreases, the bimetal contacts the battery cell so that heat generated from the heating part of the third thermoelectric element is transferred to the battery cell through the bimetal.
[Claim 11]
A battery module including a battery cell stack in which a plurality of battery cells are stacked and a casing surrounding the battery cell stack; And a heat transfer member having a plurality of battery modules and disposed between any one battery module among the plurality of battery modules and another battery module adjacent to the one battery module to cool or heat the battery module. And the heat transfer member is installed to be spaced apart from the battery module and is in contact with the battery module to cool or heat the battery module.
[Claim 12]
A battery pack comprising the battery module according to any one of claims 1 to 10.
[Claim 13]
A vehicle comprising the battery module according to any one of claims 1 to 10.