Art
[1]
The present invention relates to a car comprising the battery pack and a battery pack comprising such battery module, and these battery modules.
[2]
This application claims priority to an application for the Korea Patent Application No. 10-2017-0032572, filed as March 15 2017, all the contents disclosed in the specification and drawings of that application is hereby incorporated by reference into this application.
BACKGROUND
[3]
High application ease according to the product line, the electric vehicle driven by a secondary battery, an electrical drive source, as well as a portable device having an electrical characteristic, such as high energy density (EV, Electric Vehicle) or a hybrid vehicle (HEV, Hybrid Electric Vehicle) or the like It has been applied universally. These rechargeable batteries are not only the primary advantage of being able to reduce the use of fossil fuels dramatically attracting attention as a new energy source for environmentally friendly and energy efficiency in that the by-products of the use of energy does not occur at all.
[4]
Type of secondary battery is now widely used, there are lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries. Operating voltage of this unit secondary battery cells, that is, the unit battery cell is about 2.5V ~ 4.6V. Thus, more than if the required high output voltage by connecting a plurality of battery cells in series and also configure the battery pack. In addition, the parallel connection of a plurality of battery cells in accordance with the charge-discharge capacity required for the battery pack, and also configure the battery pack. Therefore, the number of battery cells included in the battery pack may be variously set according to the output voltage required, or charge-discharge capacity.
[5]
On the other hand, if you want to configure the battery pack by connecting a plurality of battery cells in series / parallel, and at least one of the battery cells constituting the formed battery module first, and this at least one of the battery pack is added to the other components using a battery module this is a general method to configure.
[6]
The battery pack of the multi-module structure, since the plurality of secondary batteries are manufactured in a manner of being concentrated in a small space, it is important to easily dissipate heat generated from the respective secondary batteries. The process of charging or discharging of the secondary battery, the battery is done by the electrochemical reaction, the heat of the battery module, called out by the charge-discharge procedure is not effectively removed, taking place the heat accumulation, and as a result deterioration of the battery module promoted, in some cases, It may cause ignition or explosion.
[7]
Accordingly, the battery module, and it is equipped with a high-output, large-capacity battery pack has a cooling device is necessary to cool the battery cells that is embedded in it.
[8]
Generally, the cooling device include a typical air-cooled and water-cooled, two, the air-cooled due to the short circuit, a problem, such as water of the secondary battery is widely used than the water-cooled.
[9]
Power that can be produced by a single secondary battery cells, the battery modules commercially because the greater is generally packaged by laminating the necessary number of the plurality of battery cells in a module case. And cooling the heat generated in the process of electricity production in the individual battery cells and insert a plurality of cooling tubes for cooling water flows in the middle of the middle battery cells to maintain the proper temperature of the secondary battery, to the cooling tube thereby mounting the cooling pump to the battery module to the coolant supply smoothly.
[10]
However, such the conventional battery module having a cooling structure for a water-cooled manner, due to the cooling tube for cooling water, cooling pump or the like has a problem to reduce the floor area ratio of the battery cells in the battery module. In other words, there is a problem that the energy density of the battery module decreases.
[11]
In addition, in the battery module of the prior water-cooling method, there is a design for a self-mounted, such as the cooling tube and the cooling pump difficult.
[12]
Therefore, the seeking of improved energy density and well Sikkim ways to provide a car including the pack battery, and this battery pack including the battery module, such a battery module having a simpler cooling mechanism is required.
Detailed Description of the Invention
SUMMARY
[13]
Accordingly, it is an object of the present invention is to provide a car including the pack battery, and this battery pack including the battery module, such a battery module having a cooling structure as well as a simpler and improving the energy density.
Problem solving means
[14]
In order to solve the above object, the present invention provides a battery module, a plurality of battery cell assemblies, including at least one battery cell; A bottom case for accommodating the plurality of battery cell assemblies; Upper case that is mounted on the upper side of the bottom case, the exposed upper side portion, the front portion and rear portion of the plurality of battery cell assemblies; And a cooling unit, and covering the exposed portion of the plurality of battery cell assemblies, comprising a phase change material for cooling of the plurality of battery cell assemblies; provides a battery module comprising: a.
[15]
The cooling unit, is inserted into the upper case, a base frame which is in contact with the exposed portion of the plurality of battery cell assemblies; The phase change material that is accommodated in an upper side of the base frame; And a cover frame able to be closed to the phase change material which is mounted above the base frame, may include a.
[16]
Said base frame, and covers the upper portion of the plurality of battery cell assemblies, the base body having a receiving groove for accommodating the phase change material; Base bridge which is provided at both ends of the base body, covering the front portion and rear portion of the plurality of battery cell assemblies; And it is provided between the bridge base, defining a battery cell assembly of the bridge facing compartment; may include.
[17]
The partition bridge is disposed between the battery cell assembly of the face, and may be in contact with the battery cell assembly of the face.
[18]
The cover frame is, along the front-rear direction of the upper case to be protruded at a predetermined length.
[19]
The cooling unit includes a plurality of pieces is provided, wherein the plurality of cooling units can be arranged mutually spaced apart along the left-right direction of the upper case.
[20]
The plurality of battery cell assemblies, the plurality of battery cells, which are mutually stacked; A cell housing to cover the plurality of battery cells; It is mounted on the front and back of the cell housing, the bus bars of the plurality of battery cells and a pair of electrically connected; And it is respectively mounted on the bus bars of the pair, a pair of thermally conductive pads for heat transfer of the plurality of battery cells; may contain.
[21]
Each of the battery cells, and nuphyeojyeo be arranged in a horizontal direction parallel with the longitudinal direction of the plurality of battery cell assemblies.
[22]
The plurality of battery cells, may be provided in the cylindrical secondary battery.
[23]
The cell housing, a front housing covering the front of the plurality of battery cells; A rear housing covering the rear of the plurality of battery cells; It may include a; and the body housing to cover the plurality of battery cells between the front housing and the rear housing.
[24]
Bus bars of the pair, respectively, may be mounted to the front housing and the rear housing.
[25]
The present invention provides a battery pack, comprising: at least one battery module according to the embodiments described above; It provides a battery pack comprising a; and the case where the at least one beam of the battery module is inserted into the sliding.
[26]
The beam case, the cooling flow path for causing the at least one cooling water that can cool the battery modules flows; a can be provided.
[27]
The cooling unit is located in close to the cooling channel can be placed in contact with the beam case.
[28]
In addition, the present invention is an automobile, comprising: at least one battery pack according to the embodiments described above; provides jadongchaeul comprising a.
Effects of the Invention
[29]
According to various embodiments as described above, enhance the energy density and Sikkim addition it is possible to provide a more battery pack including the battery module, such a battery module having a cooling structure and easy car comprising such a battery pack.
Brief Description of the Drawings
[30]
Intended to illustrate the following figures attached to the specification are exemplary of the invention, the components which serve to further understand the spirit of the invention and together with the description of which will be described later invention, the details of this invention is described in such figures be construed as limited only is not.
[31]
1 is a view illustrating a battery pack according to an embodiment of the present invention.
[32]
2 is a view, except for some of the beam base of the case the beam from the battery pack of FIG.
[33]
Figure 3 is a view illustrating a battery module of the battery pack of FIG.
[34]
Figure 4 is an exploded perspective view of the battery module of FIG.
[35]
5 is a perspective view of the battery cell assembly of the battery module of FIG.
[36]
Figure 6 is an exploded perspective view of the battery cell assembly of Figure 5;
[37]
7 is a perspective view of a cooling unit of a battery module of FIG.
[38]
8 is a cross-sectional view of the cooling unit of FIG.
[39]
Figure 9 is a perspective view of the base body of the cooling unit of FIG.
[40]
10 is a view for explaining the cooling of the battery pack of FIG.
Mode for the Invention
[41]
The invention will be more apparent by describing in detail a preferred embodiment of the present invention with reference to the accompanying drawings. Embodiment described herein examples are illustrative as shown for better understanding of the invention, the invention is to be understood that the same may be practiced with different embodiments and various modifications described herein. Further, the appended drawings are not illustrated to scale it can be shown to be the dimensions of some of the components exaggerated for a better understanding of the invention.
[42]
1 is a view illustrating a battery pack according to an embodiment of the present invention, Figure 2 is a view, except for some of the beam base of the case the beam from the battery pack of FIG.
[43]
1 and 2, the battery pack 1, as a motor fuel source, may be provided in the car. By way of example, the battery pack 1 can be provided in the car for any other method that can be used for an electric vehicle, hybrid vehicle and the other battery pack (1) as a fuel source. In addition, the battery pack (1) can also be provided or the like, such as also any other device or apparatus and equipment power storage device (Energy Storage System) using a secondary battery in addition to the motor vehicle. FIG.
[44]
The above-mentioned battery pack 1, can include a case the beam 10 and the battery module 50.
[45]
The case beam 10 forms the exterior of the battery pack 1, can accommodate at least one battery module 50 to be described later. Here, at least one battery module 50 to be described later may be mounted through a sliding inserted into the case beam 10. For such a sliding insert to examine in more detail in the associated description.
[46]
The case beam 10, may include a beam base 12 and the bridge beam (14).
[47]
The beam base 12 is formed to extend along forward and backward directions of the housing beam 10, is provided as a pair can be spaced apart a predetermined length arranged in a cross horizontal direction. The interior of the beam of the pair of bases 12 may be provided with a cooling passage 15 for cooling water flow, such as the bridge beam 14, which will be described later.
[48]
The bridge beam 14 and connected to the base beam (12) of the pair, may be provided in plural pieces. The plurality of bridge beam 14 may be disposed spaced apart from each other by a predetermined distance in the longitudinal direction of the case the beam 10.
[49]
At least one has to be described later between the plurality of beams of the bridge 14, in this embodiment, the two battery modules 50, a plurality can be mounted sliding inserts. In other words, each of the battery module 50 is slid along the right and left direction between each of the bridge beam (14) can be fixedly mounted between each of the bridge beam (14).
[50]
Each of the bridge beam 14, may be formed with a cooling passage (15).
[51]
The cooling channel 15 may be disposed before or after the at least one battery module 50, which is formed along the longitudinal direction of the bridge beam (14), described later. Further, the cooling channel 15 may be disposed surrounding the, the battery module 50 to be provided to the beam base (12).
[52]
Such the cooling channel (15) has a capable of cooling the at least one battery module 50 below the cooling water can flow. The cooling water can be supplied to the case beams (10) separately mounted to the case or the circulation from the beam 10, the cooling water circulating unit (not shown) that can be mounted integrally with the.
[53]
The battery module 50 can be provided with at least one, or a plural number, and more. Hereinafter, in the present embodiment it will be described with limited to the battery module 50 is provided with a plurality of pieces. The plurality of battery modules 50 can be mounted to the sliding insert and the case beam 10.
[54]
Looking at the mounting process of the plurality of battery modules 50. More specifically, first, the operator such as the any one of the beam base 12 and the plurality of beam bridge (14) of the case the beam 10 It can be combined.
[55]
Thereafter, the worker or the like can be inserted by sliding between the plurality of bridge beam (14) to (50) wherein the plurality of battery modules disposed between the plurality of bridge beam (14).
[56]
When the sliding insertion is completed in the plurality of battery modules 50, the worker, etc. The plurality of battery modules in the case the beam 10 to attach the other of the beam base 12 of the case the beam 10 it is possible to package the (50).
[57]
Thus, in this embodiment, two battery modules wherein a plurality (50) which the case the beam 10 to because it can be mounted only by sliding insert without a separate vault structure, the manufacturing efficiency of the battery pack (1) is significantly to increase have.
[58]
In the following, see than a closer look at those of the plurality of battery modules (50).
[59]
Figure 3 is a view illustrating a battery module of the battery pack of Figure 1, Figure 4 is an exploded perspective view of the battery module of FIG.
[60]
3 when and 4, each battery module 50 may include a battery cell assembly 100, a bottom case 200, the upper case 300 and the cooling unit 500.
[61]
The battery cell assembly 100 may be provided with at least one or a plurality pieces more. Hereinafter, in the present embodiment it will be described with limited to the battery cell assembly 100 having a plurality of open-circuit.
[62]
To about below, the plurality of battery cell assembly 100, see Figs. 5 and 6 to examine in more detail.
[63]
Figure 5 is a perspective view of the battery cell assembly of the battery module of Figure 4, Figure 6 is an exploded perspective view of the battery cell assembly of Figure 5;
[64]
5 and 6, the respective battery cell assembly 100, the battery cell 110, the cell housing 130, a pair of bus bars 150 and a pair of the heat conductive pads 170 It can be included.
[65]
The battery cells 110 may be provided as a cylindrical secondary battery, may be provided in plural number, at least one or more. Hereinafter, this embodiment will be described with limited to the battery cell 110 is provided with a plurality of pieces.
[66]
The plurality of battery cells 110 may be disposed gekkeum being mutually laminated. Specifically, each of the battery cells 110 may be disposed nuphyeojyeo in the horizontal direction parallel with the longitudinal direction of the plurality of battery cell assemblies 100. Specifically, the plurality of battery cells 110 may be mutually stacked along the vertical direction while disposed nuphyeojyeo in the horizontal direction.
[67]
In this embodiment, when the plurality of battery cells 110 is given the points to be nuphyeojyeo arranged in the horizontal direction, the battery pack 1 is disposed in generally the occupant's lower as when it is mounted on the motor vehicle, said plurality the safety of the battery cells for the occupant located in the upper side of the combustion or explosion of the plurality of battery cells 110 when an event occurs that can be generated in 110 may be relatively more secure than.
[68]
The cell housing 130 serves to cover the plurality of battery cells 110, may include a front housing 132, rear housing 134 and the body housing 136.
[69]
The front housing 132 may cover a front portion of the plurality of battery cells (110). The rear housing 134 may cover the rear portion of the plurality of battery cells (110).
[70]
The body housing 136 may cover the plurality of battery cells (110) between the front housing 132 and the rear housing 134. Specifically, the body housing 136 may cover the top and bottom and both side surfaces of the plurality of battery cells 110, and may include a housing cover 138 and housing base 139.
[71]
The housing cover 138 may cover the upper and both side surfaces of the plurality of battery cells (110). The housing base 139 may cover the lower side of the plurality of battery cells (110).
[72]
Bus bars 150 of the pair are each mounted on the front and back of the cell housing 130, it may be connected to the plurality of battery cells 110 electrically. Any one of the bus bars 150, the pair is mounted to a front portion of the front housing 132, it may be connected in the positive and negative electrodes of the plurality of battery cells (110) of any one of the electrodes and electrically. The other one of the bus bars 150, the pair is mounted to a rear portion of the rear housing 134, it may be connected in the positive and negative electrodes of the plurality of battery cells 110 in the other of the electrodes and electrically.
[73]
The heat transfer pad of the pair 170 may be mounted on the front and rear of the bus bars 150 of the pair as for the heat transfer of the plurality of battery cells (110). The thermal conductivity of the pad of the pair 170 can improve the cooling performance for cooling the plurality of battery cells (110).
[74]
Referring back to FIG 3 and 4, the bottom case 200 can accommodate a plurality of the battery cell assembly 100. To this end, the bottom case 200 has a receiving space for accommodating the plurality of battery cell assembly 100 may be provided.
[75]
The upper case 300 is mounted on the upper side of the bottom case 200, the upper side portion, the front portion and rear portion of the plurality of battery cell assemblies 100 can be exposed. This is to further disposed so as to close than in a plurality of the cooling unit to be described later (500) and said beam case cooling flow passage (15, Fig. 1 and Fig. 2) (10, Fig. 1 and Fig. 2).
[76]
The case beam the cooling unit 500 as to improve the cooling performance of the plurality of battery cell assemblies 100, and the exposed portion of the plurality of battery cell assemblies 100 can be covered, ( 10) may be in contact or disposed adjacent the.
[77]
Accordingly, the cooling unit 500 is the case and the beam (10, Fig. 1 and Fig. 2) wherein the beam bridges the cooling channel (15, Fig. 1 and Fig. 2 (14, Fig. 1 and Fig. 2) of the ) it may be placed in contact with the bridge beam (14) of the case the beam 10 in a close.
[78]
The above cooling unit 500 can be provided with multiple pieces. The plurality of the cooling unit 500 can be disposed mutually spaced apart along the left-right direction of the upper case (300).
[79]
To about or less, of the cooling unit of the plurality 500, see Figs. 7 to 9 to examine in more detail.
[80]
Figure 7 is a perspective view of a cooling unit of a battery module of Figure 4, Figure 8 is a cross-sectional view of the cooling unit of Figure 7, Figure 9 is a perspective view of the base body of the cooling unit of FIG.
[81]
7 to 9, a respective cooling unit 500 may include a base frame 510, phase change material 530, a cover frame (550).
[82]
The base frame 510 can be brought into contact with the exposed part is made of a metal material having high heat conductivity, is inserted into the upper case 300, the plurality of battery cell assembly 100. Such the base frame 510 may include a base body 512, the bridge base 516 and the partition bridge 516.
[83]
The base body 512 may cover the upper portion of the plurality of battery cell assembly 100. Such the base body 512 may be provided with a receiving groove (514). The receiving groove 514 is provided on the top surface of the base body 512, it is possible to accommodate the phase change material to be described later (530).
[84]
The bridge base 516 may be provided as a pair are provided respectively on both ends along the longitudinal direction of the base body (512). The said pair of bridge base 516 may cover a front portion and a rear portion of the plurality of battery cell assemblies 100.
[85]
The partition bridge 516 is provided between the base of the bridge (516) of the pair, the battery cells (100 which faces along the longitudinal direction of the upper case 300 of the plurality of battery cell assemblies 100 ) it can be partitioned.
[86]
Specifically, the partition bridge 516 is disposed between the battery cells 100 that protrudes from the lower side of the base body (512) facing along the longitudinal direction of the upper case 300, to improve the heat transfer efficiency that allows the face may be placed in contact with the battery cell assembly (100).
[87]
The phase change material 530 may be accommodated on the upper side of the base frame 510 as the material for guiding the cooling makes it possible to improve the cooling performance of the plurality of battery cell assemblies 100. Specifically, the phase change material 530 may be filled in the receiving groove 514 of the base body (512).
[88]
Such a phase change material 530 through a phase change can be provided with a material that can be changed to a gas in liquid or liquid in gas. By way of example, the phase change material 530 may be provided in nobek (Novec) material flow as a material having a lower boiling point.
[89]
The cover frame 550 may be made of a metallic material having a high thermal conductivity as the base frame 510, it may be mounted on the upper side of the base frame (510). Specifically, the cover frame 550 may be sealed to the receiving groove 514 that is attached to the upper side of the base body (512) to receive said phase change material (530).
[90]
Such the cover frame 550 can be protruded by a predetermined length along the front-rear direction of the upper case (300). A protruding portion of the cover frame 550 can be seated in the upper bridge beam (see 14, Fig. 1 and 2) of the case the beam (see 10, Fig. 1 and 2). Accordingly, the cooling unit 500 can increase the thermal conductivity of the side and fixed as well as the case and the beam 10 more reliably in the case beam 10.
[91]
In the following, see than a closer look at this example of this embodiment the cooling of the battery pack through the cooling unit 500 according to the (1, see Fig. 1 and 2).
[92]
10 is a view for explaining the cooling of the battery pack of FIG.
[93]
To Figure 10, the battery cell assemblies 100, the battery cell assembly of the heat generated in 100 is preferentially the cooling unit 500, if the temperature is raised in the battery pack 1 referring It can be delivered.
[94]
First, the bridge base 516 of the cooling unit 500 can be cooled in the cooling flow passage is 15 arranged to close, in the battery cell assembly 100 of the case the beam 10.
[95]
In addition, the battery cell the phase change material 530 of the assembly of the cooling unit 500 is disposed on an upper side of 100 can guide the cooling of the battery cell assembly (100) through the evaporation and condensation .
[96]
Specifically, in the battery cell when the heat generated by the assembly (100) to be passed to the base body 512 of the cooling unit 500, the phase change material 530 is a gas in a liquid through the phase change as can lower the temperature of the battery cell assembly (100). In addition, the case beam 10, the temperature of the cover frame 550, when the phase-change material 530 is lowered in contact with having the cooling passage 15 may be changed phase back to the liquid in the gas .
[97]
According to this mechanism, the cooling performance of the phase change material 530 is the battery cell assemblies 100 and repeats evaporation and condensation according to the temperature of the cover frame 550 of the battery cell assembly 100 It can be improved.
[98]
As such, the battery pack 1, including the battery module 50 and the battery module 50 according to this embodiment is provided with the phase change without structure such as in the cooling tubes of the complicated structure as in the prior art and the cooling pump through the cooling unit 500 is of a simple structure including a material 530 can secure the cooling performance.
[99]
Accordingly, the battery pack 1, including the battery module 50 and the battery module 50 according to this embodiment may be relatively possible to secure the floor area ratio of the battery cells 110 in a.
[100]
Accordingly, the battery pack 1, including the battery module 50 and the battery module 50 according to this embodiment and improving the energy density of the battery cells 110 through the cooling unit 500 In addition, to implement a simpler cooling mechanism.
[101]
And later, although shown and described with respect to preferred embodiments of the invention, the invention is not limited to the embodiments of the described, conventional in the art the art without departing from the subject matter of the present invention invention claimed in the claims It is capable of many variations performed by a person having knowledge of course, and this modified embodiment, will be not dwaeseo individually understood from the technical spirit or prospect of the present invention.

Claims
[Claim 1]
In the battery module, a plurality of battery cell assemblies, including at least one battery cell; A bottom case for accommodating the plurality of battery cell assemblies; Upper case that is mounted on the upper side of the bottom case, the exposed upper side portion, the front portion and rear portion of the plurality of battery cell assemblies; And a cooling unit, and covering the exposed portion of the plurality of battery cell assemblies, comprising a phase change material for cooling of the plurality of battery cell assemblies; battery module comprising: a.
[Claim 2]
The method of claim 1, wherein the cooling unit is being inserted into the upper case, a base frame which is in contact with the exposed portion of the plurality of battery cell assemblies; The phase change material that is accommodated in an upper side of the base frame; And a cover frame able to be closed to the phase change material which is mounted above the base frame, the battery module comprises a.
[Claim 3]
The method of claim 2, wherein the base frame, and covers the upper portion of the plurality of battery cell assemblies, the base body having a receiving groove for accommodating the phase change material; Base bridge which is provided at both ends of the base body, covering the front portion and rear portion of the plurality of battery cell assemblies; The battery module comprises a; and the compartment to the bridge is provided between the base bridge, defining a battery cell assembly that faces.
[Claim 4]
The method of claim 3, wherein said bridge segment is disposed between the battery cell assembly of the faces, the battery module characterized in that the contact with the battery cell assembly of the face.
[Claim 5]
The method of claim 2, wherein the cover frame, the battery module, characterized in that along the longitudinal direction of the upper case protrude by a predetermined length.
[Claim 6]
The method of claim 1, wherein the cooling unit includes a plurality of pieces is provided, wherein the plurality of cooling units, the battery module being arranged mutually spaced apart along the left-right direction of the upper case.
[Claim 7]
The method of claim 1, wherein the plurality of battery cell assemblies, the plurality of battery cells, which are mutually stacked; A cell housing to cover the plurality of battery cells; It is mounted on the front and back of the cell housing, the bus bars of the plurality of battery cells and a pair of electrically connected; And it is respectively mounted on the bus bars of the pair, a pair of thermally conductive pads for heat transfer of the plurality of battery cells; battery module comprising: a.
[Claim 8]
The method of claim 7, wherein each battery cell, a battery module that is arranged nuphyeojyeo in the horizontal direction parallel with the longitudinal direction of the plurality of battery cell assemblies.
[Claim 9]
The method of claim 7, wherein the plurality of battery cells, battery modules, characterized in that provided in the cylindrical secondary battery.
[Claim 10]
The method of claim 7, wherein the cell housing, a front housing covering the front of the plurality of battery cells; A rear housing covering the rear of the plurality of battery cells; The battery module comprises a; and between said front housing and the rear housing body housing to cover the plurality of battery cells.
[Claim 11]
The method of claim 10 wherein the bus bars of the pair, respectively, said front housing and a battery module, characterized in that mounted to the rear housing.
[Claim 12]
At least one battery module according to claim 1; The battery pack comprises a; and the case where the at least one beam of the battery module is inserted into the sliding.
[Claim 13]
The method of claim 12, wherein the case has a beam, the at least one cooling channel for a coolant that cools the battery modules flows; battery pack characterized in that the bar.
[Claim 14]
The method of claim 13, wherein the cooling unit includes a battery pack, characterized in that close to the cooling channel is disposed in contact with the beam case.
[Claim 15]
At least one battery pack according to claim 12; car comprising a.