Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises a shell and a battery pack, the plurality of battery cells are mounted in the shell at intervals along a first direction; cooling flow channels are formed in the cooling plates, the multiple cooling plates are installed in the shell, and the cooling plates are arranged on the two sides of each battery cell in the first direction; the multiple cold plates and the multiple electric control valves are arranged in a one-to-one correspondence mode, and inlets of the cooling flow channels are connected with the electric control valves. According to the battery module disclosed by the utility model, the single battery cell can be independently and quickly cooled, the control capability on the battery cell level is improved, the module at the initial stage of thermal runaway can be quickly cooled in the first time, and the thermal runaway process is inhibited.

Description

Technical Field

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

[0002] Nowadays, there is a global energy shortage, and green and sustainable electricity has become a popular choice. Electric vehicles driven by electricity have become a hot direction for the development of the current automotive industry. Its core energy component, power batteries and related technologies have become the focus of attention of global scientific and technological practitioners. Battery modules are a common form of power battery group use. At present, there are still many areas that need to be improved in power batteries, which often brings many inconveniences. The cells of existing modules and battery packs cannot be water-cooled separately, the temperature difference between cells tends to become larger and difficult to control, the consistency of the cells is difficult to control, and the internal heat loss process is difficult to control. This patent designs a new module that can quickly cool a single cell separately, increase the control capability of the cell level, and can quickly cool the early thermal runaway module at the first time to inhibit the thermal runaway process. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module that can cool a single battery cell individually and quickly, thereby increasing the control capability of the battery cell level and being able to quickly cool the early stage of thermal runaway module in the first place to inhibit the thermal runaway process.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A battery module, the battery module includes: a shell; a plurality of battery cells, the plurality of battery cells are installed in the shell at intervals along a first direction; a plurality of cold plates, a cooling channel is formed in the cold plates, the plurality of cold plates are installed in the shell, and cold plates are provided on both sides of each battery cell along the first direction; a plurality of electric control valves, the plurality of cold plates and the plurality of electric control valves are provided in a one-to-one correspondence, the inlet of the cooling channel is connected to the electric control valve; a liquid inlet pipe, the liquid inlet pipe is connected to each of the electric control valves. According to the battery module of the utility model, a single battery cell can be cooled individually and quickly, the control capability of the battery cell level is increased, and the module in the early stage of thermal runaway can be cooled quickly in the first time to suppress the progress of the thermal runaway process.

[0006] Compared with the prior art, the battery module described in the utility model has the following advantages:

[0007] According to the battery module of the utility model, by providing a shell, multiple battery cells, multiple cold plates, multiple electric control valves and a liquid inlet pipe, a single battery cell can be cooled individually and quickly, thereby increasing the control capability of the battery cell level and being able to quickly cool the early thermal runaway module in the first place to suppress the thermal runaway process.

[0008] The battery module according to the embodiment of the utility model may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the inlet and outlet of the cooling channel are respectively located on both sides of the cold plate along the second direction, the first direction and the second direction are along the horizontal direction, and the first direction and the second direction are perpendicular to each other.

[0010] According to some embodiments of the utility model, the liquid inlet pipe includes a liquid inlet main pipe and a plurality of liquid inlet branch pipes, the liquid inlet branch pipes are arranged in a one-to-one correspondence with the electric-controlled valves, the liquid inlet main pipe extends along a first direction and is spaced apart from the electric-controlled valves along a second direction, one end of the liquid inlet branch pipe is connected to the liquid inlet main pipe, and the other end of the liquid inlet branch pipe is connected to the electric-controlled valve.

[0011] According to some embodiments of the utility model, the battery module further includes a liquid outlet pipe, which extends along a first direction and is connected to outlets of a plurality of cooling channels. The liquid inlet pipe and the liquid outlet pipe are respectively located on both sides of the battery module along a second direction, and the outlet of the liquid outlet pipe is spaced apart from the inlet of the liquid inlet pipe along the first direction.

[0012] According to some embodiments of the utility model, the liquid inlet branch pipe is a hose, and the length of the liquid inlet branch pipe is L1, and the straight-line distance from the liquid inlet main pipe to the electric control valve is L2, satisfying: L1>L2.

[0013] According to some embodiments of the present invention, the shell includes two side plates spaced apart along the second direction, a plurality of through holes are formed on the side plates, and the inlet of the cooling channel or the outlet of the cooling channel extends out from the through holes.

[0014] According to some embodiments of the utility model, both sides of the cold plate along the first direction are provided with a plurality of bosses protruding along the first direction, the plurality of bosses are arranged at intervals along the third direction, and the bosses are suitable for abutting against the battery core.

[0015] According to some embodiments of the present invention, a surface of the cold plate facing the battery core is bonded by a heat-conductive structural adhesive.

[0016] According to some embodiments of the present invention, the shell further includes two end plates, there are two bosses, the two end plates are respectively located outside the outermost cold plate along the first direction, and the end plate is located between the two bosses of the same cold plate.

[0017] The present invention further provides a battery pack, which includes the battery module according to any one of the embodiments of the present invention.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 A schematic diagram of a battery module structure according to some embodiments of the utility model;

[0021] Figure 2 A schematic diagram of the connection structure between the pipe and the cold plate of a battery module according to some embodiments of the utility model;

[0022] Figure 3 It is a schematic diagram of the side panel structure according to some embodiments of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of a cold plate according to some embodiments of the utility model;

[0024] Figure 5 is a cross-sectional view of a cold plate according to some embodiments of the present invention;

[0025] Figure 6 2 is a cross-sectional view of a cold plate according to some other embodiments of the present invention.

[0026] Reference numerals:

[0027] Battery module 100;

[0028] Shell 1; upper cover 11;

[0029] Battery cell 2;

[0030] Cold plate 3; cooling channel 31; cooling channel inlet 311; cooling channel outlet 312; boss 32;

[0031] Electric control valve 4;

[0032] Liquid inlet pipe 5; liquid inlet main pipe 51; liquid inlet branch pipe 52;

[0033] Liquid outlet pipe 6; liquid outlet main pipe 61; liquid outlet branch pipe 62;

[0034] Side plate 7; through hole 71;

[0035] End plate 8. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "plurality" means two or more.

[0039] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0040] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0041] The following will refer to Figure 1-6 The utility model is described in detail in conjunction with the embodiments.

[0042] The battery module 100 according to the present invention may be a battery module 100 for a vehicle.

[0043] The present invention describes the embodiments of the present invention with the Y direction as the first direction of the battery module 100 (eg, the front-rear direction of the vehicle) and the X direction as the second direction of the battery module 100 (eg, the left-right direction of the vehicle).

[0044] The utility model provides a battery module 100, referring to Figure 1-6As shown, it includes a housing 1, a plurality of battery cells 2, a plurality of cold plates 3, a plurality of electric control valves 4 and a liquid inlet pipe 5. The housing 1 is a three-dimensional structure surrounded by plate-like structures connected end to end, which supports and fixes the entire battery module 100, and can protect the battery cells 2 inside the housing 1 from external influences, and the upper end of the housing 1 is open, which can facilitate the arrangement of internal components of the battery module 100.

[0045] Multiple cells 2 are installed in the housing 1 at intervals along the first direction, that is, the cells 2 in the battery module 100 are arranged along the length direction of the housing 1, and the cells 2 are not attached to each other, so that there are gaps to cool the cells 2 separately. Figure 1 As shown, in some specific examples, each battery cell 2 is arranged at intervals in the housing 1, and the number of the battery cells 2 is not limited thereto, and can be arranged accordingly according to specific usage requirements. Figure 1 Seven cells 2 are shown for illustrative purposes, but after reading the following technical solution, ordinary technicians can obviously understand that the solution is applied to a plurality of battery modules 100, which also falls within the scope of protection of the present utility model. An integrated busbar (Cells Contact System, CCS) assembly is arranged above the cell 2 to complete the high-voltage and low-voltage connections between the cells 2. An upper cover 11 is arranged at the top of the battery module 100 to insulate and protect the battery module 100 as a whole.

[0046] A plurality of cold plates 3 are installed in the housing 1 to cool the battery module 100. The main body of the cold plate 3 is rectangular. Optionally, the material of the cold plate 3 can be an aluminum alloy, and the process is extrusion or stamping. A cooling channel 31 is formed in the cold plate 3. The cross section of the channel can be a circular or waist-shaped hole. This arrangement allows the coolant to flow to achieve the heat exchange function of the cold plate 3. Figure 5 and Figure 6 As shown, in some specific examples, the flow channel shape of the cold plate 3 can be simple or complex, but the flow channel shape of the cold plate 3 is bilaterally symmetrical. Cold plates 3 are provided on both sides of each battery cell 2 along the first direction, that is, when each battery cell 2 is arranged along the first direction, cold plates 3 are provided on both sides of the battery cell 2 to fit the battery cell 2. This arrangement increases the cooling area of ​​a single battery cell 2, and can more effectively conduct heat from the battery cell 2 to the cold plate 3, thereby improving the cooling efficiency. Each battery cell 2 can also be cooled individually, thereby improving the service life and safety performance of the battery.

[0047] Multiple cold plates 3 are arranged in one-to-one correspondence with multiple electric control valves 4, that is, each cold plate 3 has its own electric control valve 4, which can independently control the flow rate and flow of the coolant to achieve precise cooling of each battery cell 2. This one-to-one correspondence allows the cooling system to be accurately adjusted according to the actual needs of each battery cell 2 to ensure that each battery cell 2 operates within a suitable temperature range. The cooling channel inlet 311 is connected to the electric control valve 4, that is, the cooling channel inlet 311 of each cold plate 3 is connected to the electric control valve 4 corresponding to the cold plate 3. This design can achieve independent monitoring and control of the cold plate 3 of each battery cell 2, and prevent safety problems of the entire battery module 100 caused by the failure of a certain battery cell 2.

[0048] The liquid inlet pipe 5 is connected to each electric control valve 4, that is, when the coolant flows in the liquid inlet pipe 5, it can flow into the cooling channel inlet 311 through the electric control valve 4, and then flow into the cold plate 3 that is in contact with the battery cell 2, so as to achieve a separate cooling effect on the battery cell 2. This design can also individually control the flow rate and flow velocity of the coolant when it flows into each cold plate 3, so as to achieve precise adjustment of the temperature of a single battery cell 2.

[0049] The battery module 100 controls the flow rate and flow rate of the coolant flowing from the liquid inlet pipe 5 into the cold plate 3 by setting the electric control valve 4, so as to achieve precise control of the temperature of the battery cell 2. The one-to-one setting of multiple cold plates 3 and multiple electric control valves 4 can be precisely adjusted according to the actual needs of each battery cell 2 to ensure that each battery cell 2 operates within a suitable temperature range.

[0050] According to the battery module 100 of the utility model, by providing a shell 1, multiple battery cells 2, multiple cold plates 3, multiple electric control valves 4 and a liquid inlet pipe 5, a single battery cell 2 can be cooled quickly and individually, thereby increasing the control capability of the battery cell 2 level, and the early thermal runaway module can be quickly cooled at the first time to suppress the thermal runaway process.

[0051] Refer to the following Figure 1-Figure 6 Some embodiments of the battery module 100 according to the present invention are described.

[0052] According to some embodiments of the present invention, Figure 5 and Figure 6 As shown, the cooling channel inlet 311 and the cooling channel outlet 312 are respectively located on both sides of the cold plate 3 along the second direction, the first direction and the second direction are along the horizontal direction, and the first direction and the second direction are perpendicular to each other. In some specific examples, such as Figure 1As shown, a cooling channel inlet 311 and a cooling channel outlet 312 are provided on both sides of each cold plate 3, so that the coolant can flow from the water inlet pipe through the cooling channel inlet 311 into the cold plate 3, and then the coolant flows out from the cooling channel outlet 312. Cold plates 3 are attached to both sides of the battery cell 2, and the coolant can achieve heat exchange with the battery cell 2 in the cold plate 3 during the process of flowing in and out of the cooling channel 31, thereby regulating the temperature of the battery cell 2.

[0053] According to some embodiments of the present invention, Figure 2 As shown, the liquid inlet pipe 5 includes a liquid inlet main pipe 51 and a plurality of liquid inlet branch pipes 52. The liquid inlet main pipe 51 extends along a first direction and is spaced apart from the electric control valve 4 along a second direction. The liquid inlet main pipe 51 contains cooling liquid flowing along the first direction. The liquid inlet main pipe 51 extends along the direction in which the cold plates 3 are arranged at intervals, and there is high pressure in the liquid inlet main pipe 51. The cooling liquid can flow into each cold plate 3 after the flow rate is controlled by the electric control valve 4. One end of the liquid inlet branch pipe 52 is connected to the liquid inlet main pipe 51 so that the cooling liquid can flow from the liquid inlet main pipe 51 into each liquid inlet branch pipe 52 to realize the diversion of the cooling liquid. The other end of the liquid inlet branch pipe 52 is connected to the electric control valve 4. The liquid inlet branch pipe 52 is arranged one by one with the electric control valve 4. Such an arrangement allows the cooling liquid diverted from the liquid inlet branch pipe 52 to flow into the cold plate 3 after being adjusted by the electric control valve 4, so as to realize precise cooling for different states of each battery cell 2.

[0054] According to some embodiments of the present invention, Figure 2 As shown, the battery module 100 further includes a liquid outlet pipe 6, which includes a liquid outlet main pipe 61 and a plurality of liquid outlet branch pipes 62. The liquid outlet main pipe 61 extends along a first direction, that is, the liquid outlet main pipe 61 extends along the direction in which the cold plates 3 are arranged at intervals. One end of the liquid outlet branch pipe 62 is connected to the cooling channel outlet 312, so that the coolant flowing out of the cooling channel outlet 312 of each cold plate 3 can flow into the liquid outlet branch pipe 62. The other end of the liquid outlet branch pipe 62 is connected to the liquid outlet pipe 6, so that the coolant can flow from each liquid outlet branch pipe 62 into the liquid outlet main pipe 61. In some specific examples, such as Figure 1 As shown, the liquid inlet pipe 5 and the liquid outlet pipe 6 are respectively located on both sides of the battery module 100 along the second direction, and the outlet of the liquid outlet pipe 6 is spaced apart from the inlet of the liquid inlet pipe 5 along the first direction. This arrangement allows the coolant to flow through each cold plate 3 and then flow out, so as to realize the heat exchange function of the cold plate 3 to the battery cell 2.

[0055] According to some embodiments of the present invention, Figure 2As shown, the main inlet pipe 5 adopts a hard structure pipeline, and the inlet branch pipe 52 adopts a soft material and has a certain redundant curvature. The flexible structure design used in the inlet branch pipe 52 can eliminate assembly tolerances and reduce production costs. At the same time, this flexible structure design can adapt to different assembly conditions and environmental changes, avoid assembly problems caused by tolerance accumulation, and make the product more suitable for various complex application scenarios. The inlet branch pipe 52 is a hose, which can reduce the wear and damage of the inlet branch pipe 52 during use, thereby reducing the frequency and cost of repair and maintenance, and can also reduce the adjustment and correction work of the inlet branch pipe 52 during assembly, making the assembly process smoother and improving assembly efficiency. The length of the inlet branch pipe 52 is L1, and the straight-line distance from the inlet main pipe 51 to the electric control valve 4 is L2, which satisfies: L1>L2. That is, the length of the inlet branch pipe 52 is greater than the straight-line distance from the inlet main pipe 51 to the electric control valve 4, so as to better adapt to various situations in the assembly process, making the assembly more convenient and quick.

[0056] According to some embodiments of the present invention, Figure 3 As shown, the housing 1 includes two side plates 7 spaced apart along the second direction. Optionally, the side plates 7 are made of spring steel with relatively high elasticity, such as 65Mn steel, 60Si2Mn, etc., so that the force of the module can be controlled throughout its life cycle. These materials have good elasticity and recovery performance. During the life cycle of the module, the side plates 7 need to withstand various forces and pressures. By using spring steel with relatively high elasticity, the side plates 7 can be elastically deformed when subjected to force, absorb and disperse stress, and thus protect the internal components from damage. A plurality of through holes 71 are provided on the side plates 7 to avoid the electric control valve 4. The cooling channel inlet 311 or the cooling channel outlet 312 extends from the through hole 71, that is, the cooling channel inlet 311 can be connected to the electric control valve 4 through the through hole 71, so that the coolant can flow into the cold plate 3 through the through hole 71, and the cooling channel outlet 312 extends from the through hole 71 and is connected to the liquid outlet pipe 6, so that the coolant can flow out of the cold plate 3, realizing the recycling of the coolant. Optionally, the stiffness of the side plate 7 may also be controlled by adjusting the shape of the through hole 71 . Different shapes of the through hole 71 may lead to different degrees of stress concentration or dispersion, thereby affecting the deformation and stiffness of the side plate 7 .

[0057] According to some embodiments of the present invention, Figure 4As shown, both sides of the cold plate 3 along the first direction are provided with a plurality of bosses 32 protruding along the first direction, that is, the two surfaces of the cold plate 3 in contact with the battery cell 2 are provided with protruding rectangular support surfaces, which are used to support and fix the battery cell 2, prevent the battery cell 2 from shifting between the cold plates 3, and increase the structural stability of the battery module 100. The plurality of bosses 32 are arranged at intervals along the third direction, that is, the plurality of bosses 32 are arranged at intervals along the vertical direction, and the bosses 32 are suitable for stopping the battery cell 2. Such an arrangement can enhance the structural stability of the cold plate 3, so that the cold plate 3 can withstand greater pressure and impact force. Such enhanced structural stability can protect the battery cell 2 from damage by external forces, and improve the reliability and safety of the entire battery module 100.

[0058] According to some embodiments of the utility model, the surface of the cold plate 3 facing the battery cell 2 is bonded by a thermally conductive structural adhesive. The thermally conductive structural adhesive can serve as an excellent heat conduction medium to quickly transfer the heat of the battery cell 2, thereby ensuring the stable operation of the battery module 100. The thermally conductive structural adhesive has the characteristics of high strength and high temperature resistance, and can firmly bond the battery cell 2 and the cold plate 3 together. Such a design can enhance the connection rigidity and stability between the battery cell 2 and the cold plate 3. In some specific examples, such as Figure 1 As shown, the outermost cold plates 3 of the battery module 100 along the first direction are brazed by two identical cold plates 3 to fix the battery cells 2 on one side of the cold plate 3 and the end plate 8 on the other side of the cold plate 3, so as to improve the overall strength and reliability of the battery module 100.

[0059] According to some embodiments of the present invention, the housing 1 further includes two end plates 8, the number of bosses 32 is two, the two end plates 8 are respectively located outside the outermost cold plate 3 along the first direction, and the end plate 8 is located between the two bosses 32 of the same cold plate 3, so that the bosses 32 of the cold plate 3 fix the end plate 8. In some specific examples, such as Figure 1 As shown, the end plates 8 on both sides of the battery module 100 are connected to the side plates 7 by welding, riveting or structural adhesive bonding. This arrangement can make the connection between the end plates 8 and the side plates 7 of the entire battery module 100 more stable, thereby enhancing the stability of the battery module 100.

[0060] According to the battery pack of the utility model, by setting the corresponding battery module 100, the battery pack can cool a single battery cell 2 individually and quickly according to the battery module 100 of the utility model, thereby increasing the control capability of the battery cell 2 level, and can quickly cool the early thermal runaway module at the first time to inhibit the thermal runaway process.

[0061] Other structures of ... according to the embodiment of the utility model, such as ... and ..., and operations are known to ordinary technicians in the field and will not be described in detail here.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, It is characterized in that include: case; A plurality of battery cells, wherein the plurality of battery cells are installed in the housing at intervals along a first direction; A plurality of cold plates, each of which has a cooling channel formed therein, the plurality of cold plates being installed in the housing, and each of the battery cells is provided with the cold plates on both sides along the first direction; A plurality of electrically controlled valves, wherein the plurality of cold plates and the plurality of electrically controlled valves are arranged in one-to-one correspondence, and the inlet of the cooling channel is connected to the electrically controlled valve; A liquid inlet pipe is connected to each of the electric control valves.

2. The battery module according to claim 1, It is characterized in that The inlet and the outlet of the cooling channel are respectively located at two sides of the cold plate along the second direction, the first direction and the second direction are along the horizontal direction, and the first direction and the second direction are perpendicular to each other.

3. The battery module according to claim 2, It is characterized in that The liquid inlet pipe includes a liquid inlet main pipe and a plurality of liquid inlet branch pipes, wherein the liquid inlet branch pipes are arranged in a one-to-one correspondence with the electric control valves, the liquid inlet main pipe extends along a first direction and is spaced apart from the electric control valves along a second direction, one end of the liquid inlet branch pipe is connected to the liquid inlet main pipe, and the other end of the liquid inlet branch pipe is connected to the electric control valve.

4. The battery module according to claim 2, It is characterized in that It also includes a liquid outlet pipe, which extends along the first direction and is connected to the outlets of multiple cooling channels. The liquid inlet pipe and the liquid outlet pipe are respectively located on both sides of the battery module along the second direction, and the outlet of the liquid outlet pipe is spaced apart from the inlet of the liquid inlet pipe along the first direction.

5. The battery module according to claim 3, It is characterized in that The liquid inlet branch pipe is a hose, and the length of the liquid inlet branch pipe is L1. The straight-line distance from the liquid inlet main pipe to the electric control valve is L2, satisfying: L1>L2.

6. The battery module according to claim 2, It is characterized in that The housing includes two side plates spaced apart along a second direction, a plurality of through holes are formed on the side plates, and the inlet of the cooling channel or the outlet of the cooling channel protrudes from the through holes.

7. The battery module according to any one of claims 1 to 6, It is characterized in that Both sides of the cold plate along the first direction are provided with a plurality of bosses protruding along the first direction, the plurality of bosses are arranged at intervals along the third direction, and the bosses are suitable for stopping against the battery core.

8. The battery module according to claim 7, It is characterized in that The surface of the cold plate facing the battery core is bonded by a heat-conducting structural adhesive.

9. The battery module according to claim 7, It is characterized in that The shell further includes two end plates, the number of the bosses is two, the two end plates are respectively located outside the outermost cold plates along the first direction, and the end plate is located between the two bosses of the same cold plate.

10. A battery pack, It is characterized in that A battery module comprising any one of claims 1 to 9.

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