CN215644887U - Battery module and vehicle - Google Patents

Abstract

The utility model discloses a battery module and a vehicle, wherein the battery module comprises: the battery cell comprises a battery cell and a plurality of battery cells, wherein the battery cell is constructed in a plurality and the battery cells are stacked in the thickness direction; the battery cell structure comprises a first bus bar and a second bus bar, wherein the first bus bar is connected with positive poles of a plurality of battery cells, and the second bus bar is connected with negative poles of the plurality of battery cells; the battery cell structure comprises a first side wall and a second side wall, wherein the first side wall and the second side wall extend in the length direction of a first busbar and a second busbar, and a plurality of battery cells are clamped between the first side wall and the second side wall; the battery comprises a first side wall, a second side wall, a first busbar and a plurality of cover plates, wherein the first side wall is provided with a first cooling part, the second side wall is provided with a second cooling part, and third cooling parts are arranged between the first busbar and the plurality of cover plates of the battery cells and between the second busbar and the plurality of cover plates of the battery cells. According to the battery module provided by the embodiment of the utility model, when the battery core runs at high power, the overall temperature of the battery core is uniform.

Description

Battery module and vehicle

Technical Field

The utility model relates to the field of vehicle manufacturing, in particular to a battery module and a vehicle with the battery module.

Background

Among the prior art, battery module sets up cooling structure in two sides and bottom department usually to carry out high-efficient cooling, and then adopt the busbar to dispel the heat on battery module's upper portion, it is higher to lead to the apron department temperature far away from the cold plate, and its local temperature can exceed 45 degrees even, and the local temperature of electricity core is high enough to destroy the chemical balance in the electricity core, and causes the side reaction, and long-term use can lead to electric core life-span to reduce, exists the space of improvement.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, one objective of the present invention is to provide a battery module, which performs targeted heat dissipation on a battery cell to make the overall temperature of the battery cell uniform, so as to facilitate improvement of the temperature balance of the battery cell.

The battery module according to an embodiment of the present invention includes: the battery cell comprises a battery cell and a plurality of battery cells, wherein the battery cell is constructed in a plurality and the battery cells are stacked in the thickness direction; the battery cell structure comprises a first bus bar and a second bus bar, wherein the first bus bar is connected with positive poles of a plurality of battery cells, and the second bus bar is connected with negative poles of the plurality of battery cells; the battery cell structure comprises a first side wall and a second side wall, wherein the first side wall and the second side wall extend in the length direction of a first busbar and a second busbar, and a plurality of battery cells are clamped between the first side wall and the second side wall; the battery comprises a first side wall, a second side wall, a first busbar and a plurality of cover plates, wherein the first side wall is provided with a first cooling part, the second side wall is provided with a second cooling part, and third cooling parts are arranged between the first busbar and the plurality of cover plates of the battery cells and between the second busbar and the plurality of cover plates of the battery cells.

According to the battery module provided by the embodiment of the utility model, when the battery core runs at high power, the overall temperature of the battery core is uniform.

According to the battery module of some embodiments of the present invention, the first bus bar is connected to the first side wall or/and the first cooling part to guide heat to the first cooling part, and the second bus bar is connected to the second side wall or/and the second cooling part to guide heat to the second cooling part.

According to the battery module of some embodiments of the present invention, the third cooling part is configured as a phase change block adapted to guide heat of the cap plates of the plurality of battery cells to the first and second bus bars.

According to the battery module of some embodiments of the present invention, the height of the phase change block is the same as the height of the positive electrode tab and the height of the negative electrode tab.

According to the battery module of some embodiments of the present invention, the upper surface of the phase change block is attached to the lower surfaces of the first bus bar and the second bus bar.

According to the battery module of some embodiments of the present invention, the phase change block is provided with a plurality of avoidance holes, and each avoidance hole is opposite to the corresponding explosion-proof valve of the battery cell.

According to the battery module of some embodiments of the present invention, the first bus bar and the second bus bar are identical in structure and include: a busbar body comprising: the battery cell comprises a body part and a bent part, wherein the body part is arranged at the upper ends of the battery cells and is connected with the corresponding pole, and the bent part is arranged at the outer edge of the body part and extends downwards; the heat conduction silica gel layer is coated on the periphery of the bent part and is constructed into an insulating piece; the heat-conducting silica gel layer of the first busbar is connected with the first side wall or the first cooling part, and the heat-conducting silica gel layer of the second busbar is connected with the second side wall or the second cooling part.

According to some embodiments of the battery module, a first receiving groove with an open upper end is formed at an upper end of the first side wall, a second receiving groove with an open upper end is formed at an upper end of the second side wall, the first receiving groove is adapted to receive the heat-conducting silicone layer of the first bus bar, and the second receiving groove is adapted to receive the heat-conducting silicone layer of the second bus bar.

According to some embodiments of the battery module of the present invention, the first receiving groove is in interference fit with the heat-conducting silicone layer of the first bus bar, and the second receiving groove is in interference fit with the heat-conducting silicone layer of the second bus bar.

The utility model further provides a vehicle.

According to the vehicle of the embodiment of the utility model, the battery module of any one of the above embodiments is provided.

The advantages of the battery module and the battery module are the same compared with the prior art, and are not described herein again.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic mechanical diagram of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

Reference numerals:

the battery module 100 is provided with a battery case,

the battery cell 1, the explosion-proof valve 11, the positive pole post 12, the negative pole post 13, the first bus bar 21, the second bus bar 22, the bus bar body 23, the body part 231, the bending part 232, the heat-conducting silica gel layer 24,

the first cooling portion 31, the second cooling portion 4, the second cooling portion 41, the third cooling portion 5, the relief hole 51, and the fourth cooling portion 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A battery module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 3.

As shown in fig. 1, a battery module 100 according to an embodiment of the present invention includes: cell 1, first busbar 21, second busbar 22, first sidewall 3, and second sidewall 4.

Wherein, as shown in fig. 1, the module casing structure of battery module 100 is the open box-like structure of one end, and 1 fixed mounting of electric core is in the module casing, and electric core 1 constructs to be a plurality ofly, and a plurality of electric cores 1 pile up the setting in the thickness direction, arranges the setting in proper order along the length direction (the fore-and-aft direction shown in fig. 1) of module casing promptly, and the module casing is used for carrying on spacingly along the thickness direction of electric core 1 to guarantee that electric core 1 can remain stable.

The utmost point post of a plurality of electric cores 1 all sets up the open side (as the upper end in fig. 2 promptly) at the module casing, and the positive post 12 of a plurality of electric cores 1 corresponds the setting with one side, and the negative pole post 13 of a plurality of electric cores 1 corresponds the setting with one side, if can all set up the positive post 12 of a plurality of electric cores 1 in the left side to all set up the negative pole post 13 of a plurality of electric cores 1 on the right side.

Correspondingly, as shown in fig. 1, the first bus bar 21 and the second bus bar 22 are configured as a plate-shaped structure extending along the length direction of the module case, and the first bus bar 21 may be attached to the left upper side of the battery cells 1, such that the first bus bar 21 is connected to the positive posts 12 of the plurality of battery cells 1, and the second bus bar 22 may be attached to the right upper side of the battery cells 1, such that the second bus bar 22 is connected to the negative posts 13 of the plurality of battery cells 1, thereby allowing the plurality of battery cells 1 to be collectively supplied with power outward.

Wherein the right side wall of the module case may be set as the first side wall 3 and the left side wall of the module case may be set as the second side wall 4, or as shown in fig. 1, the left side wall of the module case may be set as the first side wall 3 and the right side wall of the module case may be set as the second side wall 4. The first side wall 3 and the second side wall 4 extend along the length direction (i.e., the front-back direction in fig. 1) of the first busbar 21 and the second busbar 22, so that the first side wall 3 and the second side wall 4 are attached to the outer side walls of the battery cells 1 from both sides to sandwich the plurality of battery cells 1, and the battery cells 1 are stable in the width direction of the module case.

It should be noted that, in the working process of the battery module 100, the electric core 1 can lead to a great heat productivity with high-power during operation, the temperature of the electric core 1 will rise, because the restriction of the structure of the electric core 1, the temperature inconsistency of the different positions of the electric core 1 (because the middle position of the electric core 1 is difficult to dissipate heat, and the edge position of the electric core 1 dissipates heat faster, therefore, the temperature of the middle part of the electric core 1 is higher), and because one side (namely the cover plate) of the electric core 1 is provided with the terminal, the terminal of the electric core 1 will generate a great deal of heat during the high-power operation of the electric core 1, the temperature of the cover plate of the electric core 1 is easily higher, the temperature balance of the electric core 1 is poor, the chemical balance in the electric core 1 can be damaged and the side reaction is caused, the charging and discharging efficiency and the service life of the electric core 1 are affected.

In the present invention, the first cooling portion 31 is disposed on the first side wall 3, so that heat generated by the battery cell 1 can be transferred to the first cooling portion 31 from a side close to the first side wall 3, and the second cooling portion 41 is disposed on the second side wall 4, so that heat generated by the battery cell 1 can be transferred to the second cooling portion 41 from a side close to the second side wall 4, thereby enabling both sides of the battery cell 1 to be effectively cooled by the first cooling portion 31 and the second cooling portion 41. Further, install third cooling portion 5 through the apron at electric core 1 to make one side of third cooling portion 5 stretch into between the apron of first busbar 21 and a plurality of electric core 1, and make the opposite side of third cooling portion 5 stretch into between the apron of second busbar 22 and a plurality of electric core 1, make the produced heat of electric core 1 can transmit to third cooling portion 5, in order to cool off the apron fast, realized the holistic effective cooling of electric core 1.

From this, set up first cooling portion 31 and second cooling portion 41 through the both sides at electric core 1, and the apron department correspondence at electric core 1 is equipped with third cooling portion 5, with the cooling of cooling down to electric core 1 pertinence, improve electric core 1's radiating efficiency, at electric core 1 with high-power during operation, make the holistic temperature of electric core 1 tend to equal, in order to do benefit to the temperature equilibrium that improves electric core 1, and then guaranteed the generating performance and the life of battery module 100.

Optionally, a fourth cooling portion 6 may be disposed on a side of the battery cell 1 away from the first bus bar 21 and the second bus bar 22, and by providing the fourth cooling portion 6, the battery cell 1 is circumferentially provided with a cooling structure, so as to facilitate improvement of heat dissipation performance of the battery cell 1, and further improve the temperature balance of the battery cell 1.

Alternatively, the first cooling part 31, the second cooling part 41, the third cooling part 5 and the fourth cooling part 6 may be arranged according to the actual design requirement, such as being configured as aluminum plates or copper plates, or as aluminum tubes or copper tubes, of course, the first cooling part 31, the second cooling part 41, the third cooling part 5 and the fourth cooling part 6 may also be configured as other materials and other shapes, which the present invention is not limited to.

In some embodiments, the first bus bar 21 is connected to the first side wall 3 or/and the first cooling part 31 to guide heat to the first cooling part 31, and the second bus bar 22 is connected to the second side wall 4 or/and the second cooling part 41 to guide heat to the second cooling part 41.

It can be understood that, when the battery cell 1 operates at a high power, the heat generated at the side of the battery cell 1 where the electrode posts are provided is large, and the heat of the battery cell 1 is transferred to the third cooling portion 5, the first bus bar 21 and the second bus bar 22, so that the temperatures of the third cooling portion 5, the first bus bar 21 and the second bus bar 22 are relatively high to form a temperature difference with the first cooling portion 31 and the second cooling portion 41.

Therefore, the heat of the first busbar 21 can be transferred to the first cooling portion 31, and the heat of the second busbar 22 can be transferred to the second cooling portion 41, so that the first cooling portion 31 and the second cooling portion 41 dissipate the heat of the cover plate of the battery cell 1, the overall temperature of the battery cell 1 tends to be equal, the temperature balance of the battery cell 1 is improved, and the power generation performance and the service life of the battery cell 1 are ensured.

In a specific design process, the first bus bar 21 may be directly connected to the first cooling portion 31 so that heat of the first bus bar 21 can be directly transferred to the first cooling portion 31, or the first bus bar 21 may be connected to the first side wall 3 so that heat of the first bus bar 21 flows through the first side wall 3 to flow to the first cooling portion 31, thereby performing heat dissipation and cooling; the second bus bar 22 may be directly connected to the second cooling portion 41 so that the heat of the second bus bar 22 can be directly transferred to the second cooling portion 41, or the second bus bar 22 may be connected to the second side wall 4 so that the heat of the second bus bar 22 flows through the second side wall 4 to flow to the second cooling portion 41, thereby performing heat dissipation cooling.

In some embodiments, the third cooling portion 5 is configured as a phase change block in which a phase change material is stored, the phase change block being adapted to guide heat of the cover plates of the plurality of battery cells 1 to the first and second bus bars 21 and 22.

It should be noted that, when the electric core 1 operates at a high power, the temperature of the cover plate of the electric core 1 rises rapidly, the phase change block can absorb the heat of the cover plate, because the heat storage value of the phase change material is higher, the phase change block can absorb more heat, and when the phase change material is changed from a solid state to a semi-solid state or a liquid state, the phase change block can absorb more heat and keep the overall temperature change small. Therefore, by configuring the third cooling portion 5 as a phase change block, the temperature rise process of the battery cell 1 can be gentle, so as to avoid thermal runaway of the battery cell 1, and ensure the safety of the battery cell 1.

Further, when the temperature of the phase change block rises, the phase change block can transfer heat to the first busbar 21 and the second busbar 22, the heat transferred to the first busbar 21 can be further transferred to the first cooling portion 31, and the heat transferred to the second busbar 22 can be further transferred to the second cooling portion 41, so that the heat dissipation and cooling of the phase change block are realized, the cover plate of the battery cell 1 is effectively cooled, the temperature of the whole battery cell 1 is consistent, and the charging and discharging efficiency and the service life of the battery cell 1 are ensured.

In some embodiments, when the phase change block is mounted to the upper side of the cover plate, the height of the phase change block is the same as the height of the positive post 12 and the height of the negative post 13, and thus, the phase change block does not interfere with the first bus bar 21 and the second bus bar 22, the first bus bar 21 may be attached to the positive posts 12 of the plurality of battery cells 1, and the second bus bar 22 may be attached to the negative posts 13 of the plurality of battery cells 1, so that the plurality of battery cells 1 may supply power to the outside in common.

In some embodiments, one side of the upper surface of the phase change block is attached to the lower surface of the first bus bar 21, and the other side of the upper surface of the phase change block is attached to the lower surface of the second bus bar 22. It can be understood that, by attaching the phase change block to the first bus bar 21 and the second bus bar 22, the heat transfer efficiency between the phase change block and the first bus bar 21 is improved, and the heat transfer efficiency between the phase change block and the second bus bar 22 is improved, so that the phase change block can rapidly transfer heat to the first cooling portion 31 and the second cooling portion 41, the temperature of the cover plate of the battery cell 1 is effectively reduced, the temperature of the whole battery cell 1 tends to be equal, and the power generation performance and the service life of the battery cell 1 are ensured.

In some embodiments, as shown in fig. 1 and fig. 2, a plurality of avoiding holes 51 are formed in the phase change block, and each avoiding hole 51 is opposite to the corresponding explosion-proof valve 11 of the battery cell 1, so that the explosion-proof valve 11 of the battery cell 1 is communicated with the outside. It can be understood that, when electric core 1 produced the thermal runaway, the pressure in electric core 1 rose sharply, and when the pressure in electric core 1 reached the default, explosion-proof valve 11 was broken, and high-pressure gas in electric core 1 discharged to the external world to avoid electric core 1 explosion to lead to thermal runaway to spread to adjacent electric core 1, improved battery module 100's security and reliability.

In some embodiments, as shown in fig. 1, the first bus bar 21 and the second bus bar 22 have the same structure, so as to reduce the number of parts of the battery module 100, reduce the processing cost and the storage cost, and in the installation process, the first bus bar 21 and the second bus bar 22 do not need to be distinguished, thereby reducing the installation difficulty and increasing the installation speed.

Wherein, as shown in fig. 3, the first bus bar 21 and the second bus bar 22 include: a busbar body 23 and a thermally conductive silicone layer 24.

Further, as shown in fig. 3, the busbar body 23 includes: the main body 231 and the bending portion 232, the main body 231 is configured to be a plate-shaped structure, the main body 231 is disposed at the upper end of the plurality of cells 1, and the lower side of the main body 231 is used for being attached to the terminal, so as to achieve the electrical connection between the bus bar body 23 and the corresponding terminal, the bending portion 232 is disposed at the outer edge of the main body 231, and the whole body extends downward, meanwhile, the inner side wall of the bending portion 232 of the first bus bar 21 is spaced apart from the first side wall 3, and the inner side wall of the bending portion 232 of the second bus bar 22 is spaced apart from the second side wall 4, so as to prevent the cells 1 from being electrically connected to the module housing.

Moreover, the heat-conducting silica gel layer 24 is designed along the shape relative to the bending part 232, so as to coat the periphery of the bending part 232, the heat of the bending part 232 can be transferred to the heat-conducting silica gel layer 24, so as to further dissipate heat, and the heat-conducting silica gel layer 24 is constructed as an insulating part, so that the bending part 232 can be completely insulated and separated from the outside, so as to avoid the electric leakage or short circuit of the battery cell 1, and thus the safety of the battery module 100 is improved.

The thermally conductive silicone layer 24 of the first bus bar 21 is connected to the first side wall 3 or the first cooling portion 31, and the thermally conductive silicone layer 24 of the second bus bar 22 is connected to the second side wall 4 or the second cooling portion 41. Specifically, the heat-conductive silicone layer 24 of the first bus bar 21 may be directly connected to the first cooling portion 31, so that the heat of the first bus bar 21 can be directly transferred to the first cooling portion 31, or the heat-conductive silicone layer 24 of the first bus bar 21 may be connected to the first side wall 3, so that the heat of the first bus bar 21 flows through the first side wall 3 to flow to the first cooling portion 31, thereby performing heat dissipation and cooling; the heat conductive silicone layer 24 of the second bus bar 22 may be directly connected to the second cooling portion 41 so that the heat of the second bus bar 22 can be directly transferred to the second cooling portion 41, or the heat conductive silicone layer 24 of the second bus bar 22 may be connected to the second side wall 4 so that the heat of the second bus bar 22 flows through the second side wall 4 to the second cooling portion 41, thereby performing heat dissipation and cooling.

Through the arrangement, the phase change block can be effectively transmitted to the first cooling part 31 and the second cooling part 41, so that the heat transfer efficiency of the phase change block is improved, the cover plate of the battery cell 1 can rapidly transmit heat to the first cooling part 31 and the second cooling part 41, the temperature of the cover plate of the battery cell 1 is effectively reduced, the overall temperature of the battery cell 1 tends to be equal, and the power generation performance and the service life of the battery cell 1 are ensured.

In some embodiments, a first receiving groove with an open upper end is formed at the upper end of the first sidewall 3, the first receiving groove is disposed along the shape of the heat-conducting silica gel layer 24 of the first bus bar 21, the bending portion 232 of the first bus bar 21 can extend into the first receiving groove, and the outer wall of the heat-conducting silica gel layer 24 of the first bus bar 21 can be attached to the inner wall of the first receiving groove. Meanwhile, the upper end of the second side wall 4 is formed with a second accommodating groove with an open upper end, the second accommodating groove is arranged along with the shape of the heat-conducting silica gel layer 24 of the second bus bar 22, the bending part 232 of the second bus bar 22 can stretch into the second accommodating groove, and the outer wall of the heat-conducting silica gel layer 24 of the second bus bar 22 can be attached to the inner wall of the second accommodating groove.

Through the above arrangement, the heat conduction area of the first busbar 21 and the first side wall 3 is increased, and the heat conduction area of the second busbar 22 and the second side wall 4 is increased, so that the heat dissipation efficiency of the phase change block is increased, so that the phase change block can rapidly transfer heat to the first cooling part 31 and the second cooling part 41, the temperature of the cover plate of the battery cell 1 is effectively reduced, the overall temperature of the battery cell 1 tends to be equal, and the power generation performance and the service life of the battery module 100 are ensured.

In some embodiments, the first receiving groove is in interference fit with the thermal conductive silicone layer 24 of the first bus bar 21, and the second receiving groove is in interference fit with the thermal conductive silicone layer 24 of the second bus bar 22. From this, so that the heat conduction silica gel layer 24 of first busbar 21 keeps relatively stable with first holding tank all the time, and make the heat conduction silica gel layer 24 of second busbar 22 keep relatively stable with the second holding tank all the time, in order to improve the installation stability of first busbar 21 and second busbar 22, do benefit to improving phase change piece radiating process's stability, improved battery module 100's heat dispersion, and guaranteed battery module 100 holistic stability and reliability.

The utility model further provides a vehicle.

According to the vehicle of the embodiment of the utility model, the battery module 100 of any one of the above-described embodiments is provided. Set up first cooling portion 31 and second cooling portion 41 through setting up the both sides at electric core 1, and one side correspondence that is equipped with utmost point post at electric core 1 is equipped with third cooling portion 5, cool off with pertinence ground to electric core 1, at electric core 1 with high-power during operation, improve electric core 1's radiating efficiency, and make the holistic temperature of electric core 1 tend to equal, in order to do benefit to the temperature equilibrium who improves electric core 1, and then guaranteed the generating performance and the life of battery module 100, the wholeness of vehicle can be improved, user satisfaction has been promoted.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery module (100), comprising:

the battery cell (1), the battery cell (1) is configured to be a plurality, and the battery cells (1) are stacked in the thickness direction;

a first busbar (21) and a second busbar (22), the first busbar (21) being connected to positive posts (12) of a plurality of the cells (1), the second busbar (22) being connected to negative posts (13) of a plurality of the cells (1);

a first side wall (3) and a second side wall (4), the first side wall (3) and the second side wall (4) extending in a length direction of the first busbar (21) and the second busbar (22), the first side wall (3) and the second side wall (4) sandwiching a plurality of the battery cells (1); wherein

The battery is characterized in that a first cooling portion (31) is arranged on the first side wall (3), a second cooling portion (41) is arranged on the second side wall (4), and third cooling portions (5) are arranged between the first busbar (21) and the cover plates of the battery cells (1) and between the second busbar (22) and the cover plates of the battery cells (1).

2. The battery module (100) according to claim 1, wherein the first bus bar (21) is connected to the first side wall (3) or/and the first cooling part (31) to guide heat to the first cooling part (31), and the second bus bar (22) is connected to the second side wall (4) or/and the second cooling part (41) to guide heat to the second cooling part (41).

3. The battery module (100) according to claim 2, characterized in that the third cooling portion (5) is configured as a phase change block adapted to guide heat of cover plates of the plurality of battery cells (1) to the first and second bus bars (21, 22).

4. The battery module (100) according to claim 3, wherein the height of the phase change block is the same as the height of the positive post (12) and the height of the negative post (13).

5. The battery module (100) according to claim 3, wherein an upper surface of the phase change block is attached to a lower surface of the first bus bar (21) and a lower surface of the second bus bar (22).

6. The battery module (100) according to claim 3, wherein the phase change block is provided with a plurality of avoiding holes (51), and each avoiding hole (51) is opposite to the corresponding explosion-proof valve (11) of the battery cell (1).

7. The battery module (100) according to claim 2, wherein the first and second bus bars (21, 22) are identical in structure and include:

a busbar body (23), the busbar body (23) comprising: the battery cell structure comprises a body part (231) and a bent part (232), wherein the body part (231) is arranged at the upper ends of the battery cells (1) and is connected with the corresponding pole, and the bent part (232) is arranged at the outer edge of the body part (231) and extends downwards;

the heat-conducting silica gel layer (24) is coated on the periphery of the bent part (232), and the heat-conducting silica gel layer (24) is constructed as an insulating piece; wherein

The heat-conducting silica gel layer (24) of the first busbar (21) is connected with the first side wall (3) or the first cooling portion (31), and the heat-conducting silica gel layer (24) of the second busbar (22) is connected with the second side wall (4) or the second cooling portion (41).

8. The battery module (100) according to claim 7, wherein the upper end of the first side wall (3) is formed with a first receiving groove having an open upper end, and the upper end of the second side wall (4) is formed with a second receiving groove having an open upper end, the first receiving groove being adapted to receive the thermally conductive silicone layer (24) of the first bus bar (21), and the second receiving groove being adapted to receive the thermally conductive silicone layer (24) of the second bus bar (22).

9. The battery module (100) of claim 8, wherein the first receiving groove is in interference fit with the thermally conductive silicone layer (24) of the first busbar (21), and the second receiving groove is in interference fit with the thermally conductive silicone layer (24) of the second busbar (22).

10. A vehicle, characterized by comprising the battery module (100) according to any one of claims 1 to 9.

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