Liquid-cooled plate assemblies, power batteries and electric vehicles

Abstract

This invention relates to the field of power battery technology, and more particularly to a liquid-cooled plate assembly, a power battery, and an electric vehicle. The liquid-cooled plate assembly is used to cool individual battery cells. Each battery cell includes adjacent first and second sidewalls. The liquid-cooled plate assembly includes a main body, a bent portion, and a connecting pipe. The main body is opposite to the first sidewall, and the bent portion is connected to the end of the main body. The bent portion is also opposite to the second sidewall and has a connecting port. The connecting pipe communicates with the connecting port to supply water to or discharge water from a second cooling channel. The liquid-cooled plate assembly provided by this invention, by incorporating the bent portion, not only improves the assembly stability of the liquid-cooled components but also facilitates placing a portion of the liquid-cooled plate assembly in a location with ample installation space. This makes it easier to fix the bent portion and the battery cell together, thus facilitating the installation of the liquid-cooled plate assembly.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and in particular to a liquid-cooled plate assembly, a power battery, and an electric vehicle. Background Technology

[0002] In recent years, my country's power battery industry has developed rapidly. The driving forces supporting the development of electric vehicles include the driving range, safety performance, and market price of power batteries. The heat dissipation structure of power batteries is directly related to their safety performance and lifespan. Summary of the Invention

[0003] This invention provides a liquid-cooled plate assembly, a power battery, and an electric vehicle to solve the defects of poor cooling performance of power batteries in the prior art, which leads to short service life and low safety, and to improve the cooling performance and heat exchange efficiency of power batteries.

[0004] This invention provides a liquid-cooled plate assembly for cooling a battery cell, the battery cell including adjacent first and second sidewalls, the liquid-cooled plate assembly comprising:

[0005] The main body has a first cooling channel inside it, and the main body is opposite to the first sidewall.

[0006] The bending portion is connected to the end of the main body portion. The bending portion has a second cooling channel that communicates with the first cooling channel. The bending portion is opposite to the second sidewall. The bending portion has a connecting opening that communicates with the second cooling channel.

[0007] A connecting pipe is connected to the connecting port to supply water to the second cooling channel or to discharge water from the second cooling channel.

[0008] According to the liquid cooling plate assembly provided by the present invention, there are two bending portions, namely a first bending portion and a second bending portion, wherein the first bending portion is located at one end of the main body portion along the length direction, and the second bending portion is located at the other end of the main body portion along the length direction;

[0009] There are two connecting pipes, namely a first connecting pipe and a second connecting pipe. The first connecting pipe is connected to the connecting port on the first bend, and the second connecting pipe is connected to the connecting port on the second bend.

[0010] According to the liquid cooling plate assembly provided by the present invention, the bending portion includes a first plate and a second plate, both the first plate and the second plate are located on the same side of the main body, the first plate and the second plate are stacked, and the first plate and the second plate are sealed together to define the second cooling channel.

[0011] According to the liquid cooling plate assembly provided by the present invention, the bending portion includes a first plate, a second plate, and a third plate, wherein the first plate is located on one side of the main body, the second plate is located on the other side of the main body, and the communication opening is located on the third plate;

[0012] A portion of the third plate is stacked and sealed to the first plate, and the third plate and the first plate define a first sub-channel.

[0013] Another portion of the third plate is stacked and sealed to the second plate, and the third plate and the second plate define a second sub-channel.

[0014] The first sub-channel and the second sub-channel are connected to form the second cooling channel.

[0015] According to the liquid cooling plate assembly provided by the present invention, the bent portion is provided with mounting holes.

[0016] According to the liquid cooling plate assembly provided by the present invention, the connecting pipe includes a connector, a manifold and at least one branch pipe. The connector is fixedly connected to the bent portion and the connector is connected to the second cooling channel through the connecting port. One end of the branch pipe is connected to and communicates with the connector, and the other end of the branch pipe is connected to and communicates with the manifold.

[0017] According to the liquid cooling plate assembly provided by the present invention, the main body includes a base plate and a cover plate stacked together, the base plate and the cover plate defining a first cooling channel, and the base plate and the cover plate being welded together.

[0018] The present invention also provides a battery module, comprising:

[0019] case;

[0020] Multiple battery cells are arranged side by side and spaced apart inside a housing. Each battery cell includes an adjacent first sidewall and a second sidewall. A first mounting space is defined between any two adjacent first sidewalls of the battery cells. Among the multiple battery cells, there is a battery cell that is closest to the housing. The first sidewall of this battery cell, which is opposite to the inner wall of the housing, defines a second mounting space with the inner wall of the housing.

[0021] A liquid cooling plate assembly, which is as described above, is provided in at least one of the first mounting space and the second mounting space. The liquid cooling plate assembly is used to dissipate heat from the battery cell. The main body of the liquid cooling plate assembly is opposite to the first sidewall, and the bent portion of the liquid cooling plate assembly is opposite to the second sidewall of the corresponding battery cell.

[0022] According to the battery module provided by the present invention, at least one of the first mounting space and the second mounting space is provided with a buffer.

[0023] The battery module provided by the present invention further includes multiple end plates, the end plates being fixed to the ends of the battery cells, and the bent portion of the liquid cooling plate assembly being fixedly connected to the end plates.

[0024] The present invention also provides an electric vehicle, including the battery module described above.

[0025] The electric vehicle provided by the present invention further includes a water-cooled unit, a battery management system, and a heating module. The water-cooled unit forms a circulation loop with the first cooling channel and the second cooling channel in the liquid-cooled plate group. The battery management system is communicatively connected to the heating module and the water-cooled unit. The heating module is adapted to heat the medium in the water-cooled unit.

[0026] The liquid-cooled plate assembly provided by this invention also has a cooling effect on the battery cells because the bent portion contains a second cooling channel. Furthermore, by incorporating the bent portion, the main body can be fixed to the battery cells, thereby improving the assembly stability of the liquid-cooled assembly. On the other hand, the design of the bent portion also allows for the placement of parts of the liquid-cooled plate assembly in locations with ample installation space, facilitating the fixed connection between the bent portion and the battery cells, thus simplifying the installation of the liquid-cooled plate assembly. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the battery module provided by the present invention;

[0029] Figure 2 This is a partial structural schematic diagram of the battery module provided by the present invention;

[0030] Figure 3This is a partially exploded view of the battery module provided by the present invention;

[0031] Figure 4 This is a partially exploded view of the battery module provided by the present invention;

[0032] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle;

[0033] Figure 6 This is an exploded view of the liquid cooling plate assembly provided by the present invention;

[0034] Figure 7 This is a schematic diagram of the power vehicle cooling system provided by the present invention;

[0035] Figure label:

[0036] 100. Battery module;

[0037] 110. Housing; 111. First mounting space; 112. Second mounting space;

[0038] 120. Battery cell; 121. First sidewall; 122. Second sidewall;

[0039] 130. End plate;

[0040] 200. Liquid-cooled plate assembly;

[0041] 210. Main body; 211. First cooling channel; 212. Base plate; 213. Cover plate;

[0042] 220, Bending section; 220a, First bending section; 220b, Second bending section; 221, Second cooling channel; 221a, First sub-channel; 221b, Second sub-channel; 222, Connecting port; 223, Mounting hole;

[0043] 230. First plate; 240. Second plate;

[0044] 250. Third plate body;

[0045] 260. Connecting pipe; 260a. First connecting pipe; 260b. Second connecting pipe; 261. Connector; 262. Manifold; 263. Branch pipe;

[0046] 310. Water-cooled unit; 311. Water pump; 312. Water tank; 320. Battery management system; 330. Heating module. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0048] The following is combined with Figures 1 to 6 The liquid cooling plate assembly 200 of the present invention is described. It should be noted that the liquid cooling plate assembly 200 can dissipate heat from the battery module 100. During charging and discharging, the battery module 100 generates a large amount of heat. When the temperature of the battery module 100 is too high, it will reduce the charging and discharging efficiency of the battery module 100 and may also affect the safety of the battery module 100, potentially causing an explosion. To facilitate temperature control of the battery module 100, a cooling component, such as the liquid cooling plate assembly 200, can be installed inside the battery module 100. The heat from the battery module 100 can be transferred to the liquid cooling plate assembly 200. The liquid cooling plate assembly 200 contains a flowing fluid medium (such as water). As the fluid medium circulates, it carries away the heat from the liquid cooling plate assembly 200, thus achieving the purpose of cooling the battery module 100.

[0049] like Figure 3 , Figure 5 As shown, the liquid cooling plate assembly 200 is used to cool the battery cell 120. The battery cell 120 includes adjacent first sidewalls 121 and second sidewalls 122.

[0050] The liquid cooling plate assembly 200 includes a main body 210, a bent portion 220, and a connecting pipe 260. The main body 210 contains a first cooling channel 211 and is opposite to a first sidewall 121. It should be noted that the main body 210 can be approximately parallel to the first sidewall 121, allowing heat from the battery cell 120 to be quickly transferred to the main body 210. Furthermore, the first sidewall 121 can be a wall surface with a large area on the upper sidewall of the battery cell 120, thereby increasing the heat dissipation area and improving heat dissipation efficiency. Additionally, the surface area of ​​the main body 210 facing the first sidewall 121 can be approximately equal to the area of ​​the first sidewall 121, thereby increasing the heat dissipation surface area and improving heat dissipation efficiency.

[0051] The bent portion 220 is connected to the end of the main body 210. The bent portion 220 has a second cooling channel 221, which communicates with the first cooling channel 211. The bent portion 220 is opposite to the second sidewall 122 and has a connecting opening 222 that communicates with the second cooling channel 221. It should be noted that when arranging the battery module 100, the bent portion 220 can be placed on the side with a larger installation space. For example, multiple battery cells 120 are arranged side by side, with the first sidewalls 121 of two adjacent battery cells 120 facing each other. The second sidewall 122 of each battery cell 120 is located at the end, and the bent portion 220 is fixedly connected to the second sidewall 122. In this way, the space at the end of the battery cell 120 can provide a larger installation space for the bent portion 220.

[0052] like Figure 2 and Figure 3 As shown, the connecting pipe 260 is connected to the connecting port 222 to supply water to or discharge water from the second cooling channel 221. For example, when the connecting pipe 260 is used as an inlet pipe, water in the connecting pipe 260 can flow to the second cooling channel 221 through the connecting port 222. Water in the second cooling channel 221 can flow to the first cooling channel 211, thus carrying away heat through liquid flow and achieving the purpose of heat dissipation. When the connecting pipe 260 is used as an outlet pipe, water from the first cooling channel 211 and the second cooling channel 221 can flow directly or indirectly into the connecting pipe 260 through the connecting port 222, thereby discharging the heat-absorbing liquid.

[0053] According to an embodiment of the present invention, the liquid cooling plate assembly 200 also has a second cooling channel 221 within the bent portion 220, thus the bent portion 220 also has a cooling effect on the battery cell 120. Furthermore, by providing the bent portion 220, on the one hand, the main body 210 can be fixed to the battery cell 120 using the bent structure, thereby improving the assembly stability of the liquid cooling assembly; on the other hand, the design of the bent portion 220 also facilitates placing part of the liquid cooling plate assembly 200 in a location with a large installation space, thereby facilitating the fixed connection between the bent portion 220 and the battery cell 120, and thus facilitating the installation of the liquid cooling plate assembly 200.

[0054] See Figure 4 and Figure 6As shown, according to some embodiments of the present invention, there can be two bending portions 220, namely a first bending portion 220a and a second bending portion 220b. The first bending portion 220a is located at one end of the main body portion 210 along its length, and the second bending portion 220b is located at the other end of the main body portion 210 along its length. There can also be two connecting pipes 260, namely a first connecting pipe 260a and a second connecting pipe 260b. The first connecting pipe 260a is connected to the connecting port 222 on the first bending portion 220a, and the second connecting pipe 260b is connected to the connecting port 222 on the second bending portion 220b. This facilitates water circulation inside the liquid cooling plate assembly 200.

[0055] In some examples, the first connecting pipe 260a can be an inlet pipe, and the second connecting pipe 260b can be an outlet pipe. Furthermore, the position of the connecting port 222 on the first bend 220a can be lower than the position of the connecting port 222 on the second bend 220b. This reduces the flow velocity of the fluid medium from the first bend 220a to the second bend 220b, thereby allowing for sufficient heat exchange between the fluid medium and the main body 210.

[0056] According to some embodiments of the present invention, see Figure 6 As shown, the bending portion 220 may include a first plate 230 and a second plate 240. Both the first plate 230 and the second plate 240 are located on the same side of the main body 210. The first plate 230 and the second plate 240 are stacked and sealed together to define a second cooling channel 221. The connecting opening 222 is located on the second plate 240. Thus, the second cooling channel 221 can be defined by the stacked plate structure, achieving the purpose of simplifying the structure.

[0057] Furthermore, the first plate 230 and the second plate 240 can be welded together by brazing, which simplifies the process and provides good sealing. To improve the welding stability of the first plate 230 and the second plate 240, in some examples, the surface of the first plate 230 surrounding the second cooling channel 221 is flat; similarly, the surface of the second plate 240 surrounding the second cooling channel 221 is flat.

[0058] According to some embodiments of the present invention, see Figure 4 and Figure 5As shown, the bending portion 220 includes a first plate 230, a second plate 240, and a third plate 250. The first plate 230 is located on one side of the main body 210, and the second plate 240 is located on the other side of the main body 210. A connecting opening 222 is located on the third plate 250. A portion of the third plate 250 is stacked and sealed to the first plate 230, and the third plate 250 and the first plate 230 define a first sub-channel 221a. Another portion of the third plate 250 is stacked and sealed to the second plate 240, and the third plate 250 and the second plate 240 define a second sub-channel 221b. The first sub-channel 221a and the second sub-channel 221b communicate to form a second cooling channel 221.

[0059] It should be noted that the liquid cooling plate assembly 200 can be sandwiched between two battery cells 120, so that the battery cell 120 located on one side of the main body 210 can exchange heat with the main body 210, and the battery cell 120 located on the other side of the main body 210 can also exchange heat with the main body 210. Therefore, the same main body 210 can exchange heat with two battery cells 120, thereby improving heat exchange efficiency.

[0060] For the bent portion 220 on the main body 210, a portion of the third plate 250 is stacked and sealed to the first plate 230, and another portion of the third plate 250 is stacked and sealed to the second plate 240. This allows a portion of the bent portion 220 to be fixedly connected to the battery cell 120 located on one side of the main body 210, and another portion to be fixedly connected to the battery cell 120 located on the other side of the main body 210, thereby improving the installation stability of the liquid cooling plate assembly 200. Furthermore, to facilitate the installation of the bent portion 220 onto the battery cell 120, the bent portion 220 is provided with a mounting hole 223. The mounting hole 223 can be a threaded hole, meaning the bent portion 220 can be fixed to the battery cell 120 with screws.

[0061] Of course, the bent portion 220 and the battery cell 120 can also be connected together by welding or riveting. There is no specific limit to the number of mounting holes 223, as long as they can meet the assembly requirements of the bent portion 220.

[0062] According to some embodiments of the present invention, see Figure 3 and Figure 4As shown, the connecting pipe 260 may include a connector 261, a manifold 262, and at least one branch pipe 263. The connector 261 is fixedly connected to the bend 220, which facilitates fixing the connecting pipe 260 at the connecting port 222. The connector 261 communicates with the second cooling channel 221 through the connecting port 222. One end of the branch pipe 263 is connected to and communicates with the connector 261, and the other end of the branch pipe 263 is connected to and communicates with the manifold 262. Here, the connecting pipe 260 can be a plastic pipe, an aluminum pipe, or a stainless steel pipe.

[0063] According to some embodiments of the present invention, the main body 210 includes a base plate 212 and a cover plate 213 stacked together, the base plate 212 and the cover plate 213 defining a first cooling channel 211, and the base plate 212 and the cover plate 213 are welded together. The welding method here can be brazing. On the one hand, the welding process is simple; on the other hand, the welded component has good sealing performance.

[0064] See Figure 1 and Figure 2 As shown, the present invention also provides a battery module 100, including: a housing 110, a liquid cooling plate assembly 200, and a plurality of battery cells 120. Specifically, the plurality of battery cells 120 are arranged side by side and spaced apart within the housing 110. Each battery cell 120 includes an adjacent first sidewall 121 and a second sidewall 122. A first mounting space 111 is defined between the first sidewalls 121 of any two adjacent battery cells 120. Among the plurality of battery cells 120, there is a battery cell 120 that is closest to the housing 110. The first sidewall 121 of this battery cell 120, which is opposite to the inner wall of the housing 110, defines a second mounting space 112 with the inner wall of the housing 110.

[0065] The liquid cooling plate assembly 200 is as described above, and at least one of the first mounting space 111 and the second mounting space 112 is provided with the liquid cooling plate assembly 200. The liquid cooling plate assembly 200 is used to dissipate heat from the battery cell 120. The main body 210 of the liquid cooling plate assembly 200 is opposite to the first side wall 121, and the bent portion 220 of the liquid cooling plate assembly 200 is opposite to the second side wall 122 of the corresponding battery cell 120. It should be noted that the liquid cooling plate assembly 200 can be placed vertically in the first mounting space 111 or the second mounting space 112, which can improve the heat dissipation efficiency of the liquid cooling plate and thus extend the service life of the battery cell 120. In addition, the liquid cooling plate assembly 200 can also play a role in fixing. The number of liquid cooling plate assemblies 200 is not specifically limited, as long as it can meet the heat dissipation requirements of the battery module 100.

[0066] According to an embodiment of the present invention, the battery module 100 is further provided with a second cooling channel 221 within the bent portion 220, which also has a cooling effect on the battery cell 120. Furthermore, by providing the bent portion 220, on the one hand, the main body 210 can be fixed to the battery cell 120 using the bent structure, thereby improving the assembly stability of the liquid cooling assembly; on the other hand, the design of the bent portion 220 also facilitates the placement of a portion of the liquid cooling plate assembly 200 in a location with ample installation space, thus making it easier to fix the bent portion 220 and the battery cell 120 together, thereby facilitating the installation of the liquid cooling plate assembly 200.

[0067] According to some embodiments of the present invention, the main body 210 of the liquid cooling plate assembly 200 and the battery cell 120 are rigidly opposed to each other. To prevent collision between the main body 210 and the battery cell 120, at least one of the first mounting space 111 and the second mounting space 112 is provided with a buffer. The buffer can be an insulating material, such as a rubber pad.

[0068] See Figure 4 As shown, according to some embodiments of the present invention, the battery module 100 further includes a plurality of end plates 130, which are fixed to the ends of the battery cells 120, and the bent portion 220 of the liquid cooling plate assembly 200 is fixedly connected to the end plates 130. The end plates 130 can be aluminum plates, which can improve and reduce the weight of the battery cells 120.

[0069] An electric vehicle according to the present invention includes a battery module 100 as described above. This electric vehicle can be an electric loader, an electric excavator, or other electric construction machinery.

[0070] According to an embodiment of the electric vehicle of the present invention, since the bending portion 220 is also provided with a second cooling channel 221, the bending portion 220 also has a cooling effect on the battery cell 120. In addition, by providing the bending portion 220, on the one hand, the main body 210 can be fixed to the battery cell 120 by utilizing the bending structure, thereby improving the assembly stability of the liquid cooling assembly; on the other hand, the design of the bending portion 220 also facilitates the placement of part of the liquid cooling plate assembly 200 in a position with a large installation space, thereby facilitating the fixed connection between the bending portion 220 and the battery cell 120, and thus facilitating the installation of the liquid cooling plate assembly 200.

[0071] According to some embodiments of the present invention, see Figure 7As shown, the electric vehicle also includes a water-cooled unit 310, a battery management system 320, and a heating module 330. The water-cooled unit 310 forms a circulation loop with the first cooling channel 211 and the second cooling channel 221 in the liquid cooling plate assembly 200. For example, the fluid medium of the water-cooled unit 310 can flow into the first cooling channel 211, the fluid medium in the first cooling channel 211 can flow into the second cooling channel 221, and the fluid medium in the second cooling channel 221 can return to the water-cooled unit 310, thus constructing a circulation loop.

[0072] The water-cooled unit 310 may also include a water pump 311 and a water tank 312, wherein the water pump 311 provides power for fluid flow and the water tank 312 stores the fluid medium. In some examples, the water tank 312 may be an expansion tank.

[0073] The battery management system 320 is communicatively connected to the heating module 330 and the water-cooled unit 310. The heating module 330 is suitable for heating the medium inside the water-cooled unit 310. This meets the thermal management requirements of the battery module 100. For example, the heating module 330 can be a PTC (Power Transmitter) heater. It should be noted that when the battery module 100 is in a cold environment, the ambient temperature of the battery module 100 is low. When starting the battery module 100, it needs to be heated first, which can be done using the heating module 330. It should also be noted that the heating module 330 can be located on the outside of the housing 110, and the heating module 330 can be used to heat the liquid flowing to the liquid cooling plate assembly 200. This eliminates the need for a separate component to heat the individual battery cells 120, further reducing the size of the battery module 100.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid-cooled plate assembly, characterized in that, The liquid cooling plate assembly is used to cool the battery cell, the battery cell including adjacent first and second sidewalls, and the liquid cooling plate assembly includes: The main body has a first cooling channel inside it, and the main body is opposite to the first sidewall. The bending portion is connected to the end of the main body portion. The bending portion has a second cooling channel that communicates with the first cooling channel. The bending portion is opposite to the second side wall. The bending portion has a connecting opening that communicates with the second cooling channel. A connecting pipe, which is connected to the connecting port, is used to supply water to the second cooling channel or to discharge water from the second cooling channel; The bending portion includes a first plate, a second plate, and a third plate. The first plate is located on one side of the main body, the second plate is located on the other side of the main body, and the communication opening is located on the third plate. A portion of the third plate is stacked and sealed to the first plate, and the third plate and the first plate define a first sub-channel. Another portion of the third plate is stacked and sealed to the second plate, and the third plate and the second plate define a second sub-channel. The first sub-channel and the second sub-channel are connected to form the second cooling channel; The bent portion is provided with mounting holes.

2. The liquid-cooled plate assembly according to claim 1, characterized in that, There are two bending portions, namely a first bending portion and a second bending portion. The first bending portion is located at one end of the length direction of the main body portion, and the second bending portion is located at the other end of the length direction of the main body portion. There are two connecting pipes, namely a first connecting pipe and a second connecting pipe. The first connecting pipe is connected to the connecting port on the first bend, and the second connecting pipe is connected to the connecting port on the second bend.

3. The liquid-cooled plate assembly according to claim 1, characterized in that, The connecting pipe includes a connector, a manifold, and at least one branch pipe. The connector is fixedly connected to the bend and is connected to the second cooling channel through the connecting port. One end of the branch pipe is connected to and communicates with the connector, and the other end of the branch pipe is connected to and communicates with the manifold.

4. The liquid-cooled plate assembly according to claim 1, characterized in that, The main body includes a base plate and a cover plate stacked together, the base plate and the cover plate defining a first cooling channel, and the base plate and the cover plate are welded together.

5. A battery module, characterized in that, include: case; Multiple battery cells are arranged side-by-side and spaced apart within a housing. Each battery cell includes an adjacent first sidewall and a second sidewall. A first mounting space is defined between any two adjacent first sidewalls of the battery cells. Among the multiple battery cells, there is a battery cell that is closest to the housing. A second mounting space is defined between the first sidewall of the battery cell that is opposite to the inner wall of the housing and the inner wall of the housing. A liquid cooling plate assembly, wherein the liquid cooling plate assembly is as described in any one of claims 1-4, and at least one of the first mounting space and the second mounting space is provided with the liquid cooling plate assembly, the liquid cooling plate assembly is used to dissipate heat from the battery cell, the main body of the liquid cooling plate assembly is opposite to the first sidewall, and the bent portion of the liquid cooling plate assembly is opposite to the second sidewall of the corresponding battery cell.

6. The battery module according to claim 5, characterized in that, At least one of the first installation space and the second installation space is provided with a buffer.

7. The battery module according to claim 5, characterized in that, It also includes multiple end plates, which are fixed to the ends of the battery cells, and the bent portion of the liquid cooling plate assembly is fixedly connected to the end plates.

8. An electric vehicle, characterized in that, Includes the battery module according to any one of claims 5-7.

9. The electric vehicle according to claim 8, characterized in that, It also includes a water-cooled unit, a battery management system, and a heating module. The water-cooled unit forms a circulation loop with the first cooling channel and the second cooling channel in the liquid-cooled plate group. The battery management system is communicatively connected to the heating module and the water-cooled unit. The heating module is adapted to heat the medium in the water-cooled unit.

Images