Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack. The battery module comprises a side surface and a bottom surface, the temperature equalizing plate comprises side plates and a bottom plate, the bottom plate is attached to the bottom face, and a condensation part is arranged in the bottom plate and used for exchanging heat with an external liquid cooling structure. The side plate is connected to the bottom plate and is attached to the side surface, and an evaporation part is arranged in the side plate and is used for exchanging heat with a battery cell module; the heat exchange efficiency and the temperature consistency between the temperature equalizing plate and the battery cells can be improved, and the effect of equalizing the temperature difference between the battery cells is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack. Background Art

[0002] In related technologies, batteries release heat during operation, causing the battery temperature to rise. Furthermore, electric vehicle battery modules are composed of hundreds of cells connected in series and parallel, and are tightly packed. This causes heat accumulation, leading to localized overheating and uneven temperature distribution, which in turn affects battery performance and, in turn, the overall vehicle performance. The heat dissipation and temperature distribution of battery modules have a significant impact on the battery's performance, cycle life, and safety.

[0003] Currently, battery modules in the industry generally use flat liquid cooling. The temperature at the top of the battery cell is relatively high. When the battery cell is fast charged, the temperature difference between the top and bottom of the battery cell is even greater. The heat at the top of the battery cell cannot be effectively removed. At the same time, the NTC is arranged at the top of the battery cell. The battery cell heat dissipation efficiency is too low, resulting in a long fast charging time. At the same time, the high temperature significantly reduces the battery cell life, affecting the user experience. Utility Model Content

[0004] The embodiments of the present invention provide a battery module and a battery pack, which can improve the technical problem of poor temperature averaging effect of existing temperature averaging plates.

[0005] In a first aspect, an embodiment of the present invention provides a battery module, comprising:

[0006] The battery module includes a cell module and a heat spreader. The cell module includes side and bottom surfaces. The heat spreader includes side panels and a bottom plate. The bottom plate is attached to the bottom surface and has a condenser section for exchanging heat with an external liquid cooling structure. The side panels are connected to the bottom plate and attached to the side surfaces. The side panels have an evaporator section for exchanging heat with the cell module.

[0007] In some embodiments, the bottom plate extends along a first direction, and the side plate extends along a second direction, and the first direction is perpendicular to the second direction;

[0008] The side panel includes a side edge connected to the bottom panel, and the side edge is extended along the third direction;

[0009] The temperature homogenizing plate further includes a plurality of first reinforcing ribs, which are arranged in the side plates. The plurality of first reinforcing ribs are arranged at intervals along a third direction and extend away from the side edges. The third direction is perpendicular to the first direction and perpendicular to the second direction.

[0010] In some embodiments, at least one of the first reinforcing ribs includes a plurality of first rib bodies, and the plurality of first rib bodies are spaced apart along the second direction.

[0011] In some embodiments, the temperature homogenizing plate further includes a plurality of second reinforcing ribs disposed in the bottom plate, wherein the plurality of second reinforcing ribs are spaced apart along the third direction and extend in a direction away from the side edge.

[0012] In some embodiments, a plurality of the first reinforcing ribs and a plurality of the second reinforcing ribs are arranged in one-to-one correspondence, two adjacent first reinforcing ribs form a first channel, and adjacent second reinforcing ribs form a second channel, and the first channel and the second channel are connected.

[0013] In some embodiments, the side plate includes two substrate plates arranged opposite to each other, and two heat-conducting nets arranged between the two substrate plates and spaced apart from each other, and the first reinforcing ribs connect the heat-conducting nets.

[0014] In some embodiments, the battery cell module includes multiple columns of battery cells, and each column of battery cells includes a side wall and a bottom wall connected to each other;

[0015] As mentioned above, a temperature averaging plate is provided between two adjacent rows of battery cells, each of the side plates is attached to one of the side walls, and each of the bottom plates is attached to one of the bottom walls.

[0016] In some embodiments, the battery module includes:

[0017] A first structural adhesive layer is bonded between each of the side walls and the side panels;

[0018] The second structural adhesive layer is bonded between each of the bottom walls and the bottom plate.

[0019] In some embodiments, a plurality of the base plates are connected in sequence to form a flat plate.

[0020] In some embodiments, the battery module further includes a liquid cooling plate and a thermally conductive adhesive layer. The liquid cooling plate is located on a side of the flat plate away from the battery cell module, and the thermally conductive adhesive layer is adhered between the flat plate and the liquid cooling plate.

[0021] In a second aspect, the present application also provides a battery pack, comprising: the battery module as described above.

[0022] Beneficial effects of the embodiments of the present utility model:

[0023] In an embodiment of the present invention, the battery module includes a cell module and a temperature equalizing plate, the cell module includes a side surface and a bottom surface; the temperature equalizing plate includes a side plate and a bottom plate: the bottom plate is attached to the bottom surface, and a condensation portion is provided in the bottom plate for exchanging heat with an external liquid cooling structure. The side plate is connected to the bottom plate and attached to the side surface, and an evaporation portion is provided in the side plate for exchanging heat with the cell module. The present application allows the high-temperature gas at the top of the cell module to flow toward the bottom plate along the guidance of the side plate, and the low-temperature liquid at the bottom of the cell module to flow toward the top of the side plate along the guidance of the bottom plate, and continuously circulates back and forth, thereby increasing the heat exchange efficiency and temperature consistency between the temperature equalizing plate and the cell, and achieving the effect of balancing the temperature difference between the cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Schematic diagram of the structure of the temperature distribution plate provided in the embodiment of the present application;

[0026] Figure 2 is a cross-sectional schematic diagram of a temperature vapor chamber provided in an embodiment of the present application;

[0027] Figure 3 yes Figure 2 A front view of the side panel shown in section;

[0028] Figure 4 yes Figure 2 A top view of the bottom plate shown in section;

[0029] Figure 5 This is an exploded view of a battery module provided in an embodiment of the application.

[0030] Reference numerals:

[0031] 100. Vacuum plate;

[0032] 10. Bottom plate; 101. Condensation unit;

[0033] 20, side panel; 201, evaporation section; 21, side;

[0034] 30. First reinforcing rib; 31. First rib body; 310. First channel;

[0035] 40. Second reinforcing rib; 41. Second rib body; 410. Second channel;

[0036] 200, battery module; 210, battery cell module; 2101, side wall; 2102, bottom wall; 220, thermal conductive adhesive layer; 230, liquid cooling plate. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0038] At present, the industry's battery modules generally use flat liquid cooling. The temperature at the top of the battery cell is relatively high. When the battery cell is fast charged, the temperature difference between the top and bottom of the battery cell is even greater. The heat at the top of the battery cell cannot be effectively removed. At the same time, the NTC is arranged at the top of the battery cell. The battery cell's heat dissipation efficiency is too low, resulting in a long fast charging time. The high temperature significantly reduces the battery cell life, affecting the user experience. The method of attaching an ordinary temperature spreader to the large surface of the battery cell can only achieve the effect of equalizing the temperature of the battery cell, and the heat transfer efficiency to the liquid cooling plate at the bottom of the battery cell has not changed significantly.

[0039] Please refer to Figure 1-Figure 3 , Figure 1 1 is a schematic structural diagram of a temperature vapor chamber 100 provided in an embodiment of the present application. Figure 2 is a cross-sectional schematic diagram of a temperature vapor chamber 100 provided in an embodiment of the present application. Figure 3 yes Figure 2 The front view of the side panel 20 is shown. The present application provides a heat spreader 100, which is a structure that cools a heat source by absorbing heat from the heat source. Since batteries generate heat during the charging and discharging process, the heat spreader 100 can absorb and distribute this heat to ensure that the temperature at different locations on the board surface remains consistent, minimize the temperature difference between each battery cell, help balance and stabilize the temperature inside the battery pack, and prevent the battery from overheating at high temperatures, resulting in performance degradation or damage.

[0040] The present application provides a battery module 200, which includes a cell module 210 and a temperature equalizing plate 100. The cell module includes a side surface and a bottom surface; the temperature equalizing plate 100 includes a side plate 20 and a bottom plate 10. The bottom plate 10 is attached to the bottom surface. A condensation portion 101 is provided in the bottom plate 10 for exchanging heat with an external liquid cooling structure to cool the cell module. The side plate 20 is connected to the bottom plate 10 and attached to the side surface. An evaporation portion 201 is provided in the side plate for exchanging heat with the cell module. The high-temperature gas at the top of the cell can flow along the side plate 20 toward the bottom plate 10, and the low-temperature liquid at the bottom of the cell can flow along the bottom plate 10 toward the side plate 20, and the cycle continues back and forth, thereby increasing the heat exchange efficiency and temperature consistency between the temperature equalizing plate 100 and the cell, and achieving the effect of balancing the temperature difference between the cells.

[0041] Specifically, the bottom plate 10 extends along a first direction. The side plates 20 are connected to the bottom plate 10 and extend along a second direction, forming an L-shaped structure with the bottom plate 10. The side plates 20 are used to achieve a uniform temperature effect on the side walls of the battery cell module 210, while the bottom plate 10 is used to achieve a uniform temperature effect on the bottom wall of the battery cell module 210.

[0042] The first direction is perpendicular to the second direction, and the side panel 20 includes a side edge 21 connected to the bottom panel 10 , and the side edge 21 extends along the third direction.

[0043] In some embodiments, the temperature equilibrium plate 100 further includes a plurality of first reinforcing ribs 30, which are disposed in the side plate 20. The plurality of first reinforcing ribs 30 are spaced apart along a third direction and extend away from the side edge 21. The third direction is perpendicular to the first direction and perpendicular to the second direction.

[0044] Among them, the number of the first reinforcing ribs 30 can be set according to actual conditions, such as 6, 7, 8, 9, etc., and this application does not limit it here.

[0045] Specifically, with the bottom plate 10 as a reference, the first direction may be a width direction of the bottom plate 10 , the second direction may be a height direction of the bottom plate 10 , and the third direction may be a length direction of the bottom plate 10 .

[0046] The side 21 can be the long side of the side panel 20, and the side panel 20 also includes a short side of the side panel 20 perpendicularly connected to the long side of the side panel 20. The first ribs 31 are arranged at intervals along the third direction, that is, the first ribs 31 are perpendicular to the long side of the side panel 20, and the first ribs 31 are parallel to the short side of the side panel 20.

[0047] Understandably, without the first reinforcing ribs 30, the high-temperature gas and low-temperature liquid would diffuse throughout the vapor chamber 100, preventing the battery's internal temperature from being balanced and stable. Excessively high or low temperatures can affect the performance of the battery module and the stability of other electronic components, and uneven heating of the battery module will not adversely affect its performance.

[0048] The present application arranges the first reinforcing rib 30 structure at regular intervals, so that the high-temperature gas at the top of the battery cell can flow toward the bottom plate 10 along the guidance of the first reinforcing rib 30, and the low-temperature liquid at the bottom of the battery cell can flow toward the top of the side plate 20 along the guidance of the first reinforcing rib 30, and circulate back and forth continuously, thereby increasing the heat exchange efficiency and temperature consistency between the temperature equalizing plate 100 and the battery cell, and achieving the effect of balancing the temperature difference between the battery cells.

[0049] Furthermore, during the charge and discharge cycles of the battery module 200, temperature changes or electrochemical reactions within the battery can cause slight changes in the volume of the battery cells. Over time, these slight changes can cause the entire module to expand. At the end of the cycle, the battery cell module 210 can expand and deform significantly. The expanded battery cell module 210 can squeeze the temperature plate 100, causing a disrupted liquid cooling cycle. The provision of multiple first reinforcing ribs 30 maintains the structural temperature and suppresses expansion and deformation of the battery cells.

[0050] In some embodiments, at least one of the first reinforcing ribs 30 includes a plurality of first rib bodies 31, which are spaced apart along the second direction. The number of first rib bodies 31 can be 2, 3, 4, etc., which is not limited in this application.

[0051] Specifically, the first ribs 31 are perpendicular to the side 21, and multiple first ribs 31 are spaced apart in the second direction. Each first rib 31 is a strip-shaped structure and is relatively short. Providing multiple first ribs 31 can reduce the overall material consumption of the reinforcement ribs while maintaining the original guiding effect.

[0052] Please refer to Figure 4 , Figure 4 yes Figure 2 In some embodiments, the temperature homogenizing plate 100 further includes a plurality of second reinforcing ribs 40 disposed in the bottom plate 10 , the plurality of second reinforcing ribs 40 being spaced apart along the third direction and extending away from the side edge 21 .

[0053] The bottom plate 10 further includes a short side perpendicular to the long side of the side plate 20 , and the second reinforcing ribs 40 are arranged at intervals along the third direction, that is, the second reinforcing ribs 40 are perpendicular to the long side of the side plate 20 , and the second reinforcing ribs 40 are parallel to the short side of the bottom plate 10 .

[0054] The number of the second reinforcing ribs 40 can be set according to actual conditions, such as 6, 7, 8, 9, etc., and this application does not limit this.

[0055] As can be understood, the provision of the second reinforcing ribs 40 not only guides the high-temperature gas and low-temperature liquid to flow along the first direction, thereby enhancing the effect of temperature uniformity circulation, but also, since the base plate 10 needs to support the battery module 210, the provision of the second reinforcing ribs 40 within the base plate 10 can also provide increased support and maintain structural stability.

[0056] In some embodiments, the side panels 20 and bottom panel 10 are integrally molded. This eliminates the need for separate component manufacturing and subsequent assembly steps, reducing the number of vapor chambers 100 and the assembly process, thereby streamlining the production process. Furthermore, since the side panels 20 and bottom panel 10 are integrally molded, the continuity and seamlessness of the connection reduces potential weaknesses or fatigue issues, providing greater structural strength and rigidity.

[0057] In some embodiments, at least one of the second reinforcing ribs 40 includes a plurality of second rib bodies 41, which are spaced apart along the first direction. The number of second rib bodies 41 can be 2, 3, 4, etc. Since the width of the bottom plate 10 is smaller than the width of the side plate 20, the number of second rib bodies 41 can be less than the number of first rib bodies 31, which is not limited in this application.

[0058] In some embodiments, a plurality of first reinforcing ribs 30 and a plurality of second reinforcing ribs 40 are arranged in a one-to-one correspondence, two adjacent first reinforcing ribs 30 form a first channel 310, and adjacent second reinforcing ribs 40 form a second channel 410. The first channel 310 and the second channel 410 are connected, and a high-temperature gas evaporation route from the side plate 20 to the bottom plate 10 and a low-temperature liquid condensation route from the bottom plate 10 to the side plate 20 are formed inside the temperature equalizing plate 100.

[0059] It will be appreciated that when eight first reinforcing ribs 30 are provided, due to the constraints at both ends of the side panels 20, the first reinforcing ribs 30 can actually form nine first channels 310. A corresponding eight second reinforcing ribs 40 are provided, forming nine second channels 410. The high-temperature gas in each first channel 310 evaporates toward the bottom panel 10, while the low-temperature liquid in each first channel 310 condenses away from the bottom panel 10. The high-temperature gas in each second channel 410 evaporates away from the side panels 20, while the low-temperature liquid in each second channel 410 condenses toward the side panels 20.

[0060] In some examples, the side plate 20 includes two opposing substrate plates, and two heat-conducting meshes disposed between the two substrate plates and spaced apart, with the first reinforcing ribs 30 connecting the heat-conducting meshes. For example, two copper plates can be disposed within the temperature-vaporizing plate 100, each with a copper mesh attached to one side facing the other, and a plurality of copper pillars disposed on the copper mesh. The excellent thermal conductivity of copper effectively conducts heat from the surface of the temperature-vaporizing plate 100 to the interior of the entire plate, thereby achieving uniform temperature distribution across the entire surface. The first reinforcing ribs 30 are disposed between the copper pillars, and then the temperature-vaporizing plate 100 is formed by heating and stamping. The substrate plates and heat-conducting meshes can also be made of materials such as stainless steel and aluminum alloy, which are not limited in this application.

[0061] Among them, the heat-conducting network includes a first heat-conducting network and a second heat-conducting network. The first heat-conducting network can be provided with multiple first reinforcing ribs 30 and abut against the second heat-conducting network; the second heat-conducting network can also be provided with multiple first reinforcing ribs 30 and abut against the first heat-conducting network; or, each of the two heat-conducting networks is provided with multiple first reinforcing ribs 30, and the first reinforcing ribs 30 of the first heat-conducting network and the first reinforcing ribs 30 of the second heat-conducting network abut against each other. The first reinforcing ribs 30 and the first heat-conducting network or the second heat-conducting network can be manufactured separately and then connected, or the first reinforcing ribs 30 can be integrally formed with the first heat-conducting network or the second heat-conducting network.

[0062] In some examples, the base plate 10 also includes two opposing substrate plates, and two thermally conductive meshes spaced apart between the substrate plates. The second reinforcing ribs 40 connect the thermally conductive meshes. Specifically, the heat spreader 100 can include two copper plates, each with a copper mesh attached to one side facing the other. The copper meshes are provided with multiple copper pillars, and the second reinforcing ribs 40 are positioned between the copper pillars. The heat spreader 100 is then formed by heat stamping. The substrate plates and thermally conductive meshes can also be made of stainless steel, aluminum alloy, or other materials, which are not limited in this application.

[0063] Please refer to Figure 5 , Figure 5 It is an exploded view of the battery module 200 provided in the embodiment of the application. The battery cell module 210 includes multiple columns of battery cell monomers and the aforementioned temperature averaging plate 100. Each column of battery cell monomers includes mutually connected side walls 2101 and bottom walls 2102. The side walls 2101 of the two columns of battery cell monomers located on the leftmost and rightmost sides form the side surfaces of the battery cell module 210, and multiple bottom walls 2102 are connected to form the bottom surface. A temperature averaging plate 100 is provided between two adjacent columns of battery cell monomers. Each of the side plates 20 is attached to one of the side walls 2101, and the side plates 20 of the temperature averaging plate 100 completely cover the side walls 2101 of the battery cell module monomer. Each of the bottom plates 10 is attached to one of the bottom walls 2102, and the bottom plate 10 of the temperature averaging plate 100 completely covers the bottom walls 2102 of the battery cell monomer.

[0064] It can be understood that in order to ensure that the temperature equalizing plate 100 can be stably installed on the battery module 200, each battery cell is equipped with a temperature equalizing plate 100. Each temperature equalizing plate 100 is arranged between adjacent battery cells so that the gap position between the battery cells also becomes a heat transfer direction, thereby improving the heat transfer efficiency of the battery module 200 and improving the problem of large temperature difference between the battery cells in the module.

[0065] In addition, for the battery module 200 , providing multiple temperature averaging plates 100 can not only improve the temperature averaging effect, but also allow partial temperature averaging plates 100 to be replaced as needed.

[0066] In some embodiments, the battery cell module 210 further includes a first structural adhesive layer and a second structural adhesive layer. The first structural adhesive layer is bonded between each of the side walls and one of the side panels 20. The second structural adhesive layer is bonded between each of the bottom walls and the bottom panel 10. After curing, the battery structural adhesive forms a sealing layer that effectively prevents electrolyte leakage, protects the internal structure of the battery from the influence of the external environment, and improves battery safety.

[0067] In some embodiments, multiple bottom plates 10 are sequentially connected to form a flat plate. It is understood that when multiple battery cells are tightly connected and formed, the flat plate of the battery module 210 is larger, and the multiple bottom walls form a complete flat plate. When the bottom plate 10 forms a complete flat plate, the entire flat plate of the battery module 210 can contact the temperature plate 100, thereby improving the temperature equalization effect.

[0068] In some embodiments, the battery module 200 further includes a liquid cooling plate 230 and a thermally conductive adhesive layer 220 . The liquid cooling plate 230 is located on a side of the flat plate away from the battery cell module 210 , and the thermally conductive adhesive layer 220 is adhered between the flat plate and the liquid cooling plate 230 .

[0069] Understandably, since the battery module 200 generates a certain amount of heat during operation, failure to effectively dissipate heat may affect the performance and life of the battery. The thermally conductive adhesive layer 220 fills the internal space of the battery and conducts the heat generated by the battery to the external environment, thereby reducing the battery temperature and improving its operating efficiency and safety.

[0070] Specifically, the liquid cooling plate 230 contacts the bottom plate 10 of the temperature vapor chamber 100, which can increase heat transfer efficiency. Multiple bottom plates 10 are arranged between the liquid cooling plate 230 and the battery module 210. Heat from the battery module 210 can be transferred to the liquid cooling plate 230 through the bottom plate 10, thereby exchanging heat with the battery module 210 through the liquid cooling plate 230. A thermally conductive adhesive layer is adhered to the side of the flat plate facing the liquid cooling plate 230. The flat plate and the liquid cooling plate 230 are tightly attached via the thermally conductive adhesive layer 220, thereby ensuring heat conduction between the liquid cooling plate 230 and the flat plate.

[0071] The present application also provides a battery pack, which includes the aforementioned battery module 200. By providing the battery module 200, the temperature inside the battery pack can be evenly distributed, thereby reducing performance unevenness or life loss caused by temperature gradients.

[0072] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery module, characterized in that: include: A battery cell module, the battery cell module comprising a side surface and a bottom surface; A temperature averaging plate, the temperature averaging plate comprising: A bottom plate is attached to the bottom surface, and a condensation portion is provided in the bottom plate for exchanging heat with an external liquid cooling structure; The side plate is connected to the bottom plate and attached to the side surface. An evaporation portion is provided in the side plate for exchanging heat with the battery module.

2. The battery module according to claim 1, wherein: The bottom plate extends along a first direction, and the side plate extends along a second direction, wherein the first direction is perpendicular to the second direction; The side panel includes a side edge connected to the bottom panel, and the side edge is extended along the third direction; The temperature homogenizing plate further includes a plurality of first reinforcing ribs, which are arranged in the side plates. The plurality of first reinforcing ribs are arranged at intervals along a third direction and extend away from the side edges. The third direction is perpendicular to the first direction and perpendicular to the second direction.

3. The battery module according to any one of claims 1 to 2, characterized in that: At least one of the first reinforcing ribs includes a plurality of first rib bodies, and the plurality of first rib bodies are arranged at intervals along the second direction.

4. The battery module according to any one of claims 1 to 2, characterized in that: The temperature homogenizing plate further includes a plurality of second reinforcing ribs disposed in the bottom plate. The plurality of second reinforcing ribs are spaced apart along the third direction and extend in a direction away from the side edge.

5. The battery module according to claim 4, characterized in that: The plurality of first reinforcing ribs and the plurality of second reinforcing ribs are arranged in one-to-one correspondence, two adjacent first reinforcing ribs form a first channel, two adjacent second reinforcing ribs form a second channel, and the first channel and the second channel are connected.

6. The battery module according to any one of claims 1-2, characterized in that: The side plate includes two base plates arranged opposite to each other, and two heat-conducting nets arranged between the two base plates and spaced apart from each other. The first reinforcing ribs connect the two heat-conducting nets.

7. The battery module according to claim 6, characterized in that: The battery cell module includes multiple rows of battery cell units, and each row of battery cell units includes a side wall and a bottom wall connected to each other; A temperature-averaging plate is provided between two adjacent rows of battery cells, each of the side plates is adhered to one of the side walls, and each of the bottom plates is adhered to one of the bottom walls.

8. The battery module according to claim 7, characterized in that: include: A first structural adhesive layer is bonded between each of the side walls and the side panels; The second structural adhesive layer is bonded between each of the bottom walls and the bottom plate.

9. The battery module according to claim 7, characterized in that: A plurality of base plates are connected in sequence to form a flat plate.

10. The battery module according to claim 9, characterized in that: The battery module further includes a liquid cooling plate and a thermal conductive adhesive layer. The liquid cooling plate is located on a side of the flat plate away from the battery core module. The thermal conductive adhesive layer is adhered between the flat plate and the liquid cooling plate.

11. A battery pack, characterized in that: include: The battery module according to any one of claims 1 to 10.

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