Heat dissipation structure of battery cell module and battery cell module

Abstract

The utility model provides a heat dissipation structure of a battery cell module and the battery cell module, the heat dissipation structure comprises a battery cell group, a shell and a heat dissipation piece, the battery cell group comprises at least two battery cells; an accommodating cavity is formed in the shell, a mounting groove communicated with the accommodating cavity is formed in one side of the shell, and the battery cell group is arranged in the accommodating cavity; one end of the heat dissipation piece penetrates through the mounting groove and extends into the accommodating cavity, the other opposite end of the heat dissipation piece extends to the outside of the shell and is connected with heat dissipation equipment, and two adjacent battery cells in the battery cell group are attached to the heat dissipation piece. The heat dissipation piece is arranged in the middle of the battery cell group, and the heat dissipation piece penetrates through the mounting groove and is attached to the two adjacent battery cells, so that heat generated in the middle of the battery cells can be effectively guided to the heat dissipation piece. Therefore, heat can be dispersed, and the problem that the middle part of the battery cell group is overheated is prevented. Meanwhile, through connection with external heat dissipation equipment, heat can be released more effectively, and the overall heat dissipation effect is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage systems, and in particular to a heat dissipation structure of a battery cell module and a battery cell module. Background Art

[0002] As the core component of electric vehicles, the energy density, lifespan and reliability of battery modules directly determine the vehicle's endurance, safety and overall performance. Currently, battery modules are mainly manufactured in two ways: stacking and winding.

[0003] In the stacked cell module design, individual cells are stacked layer by layer to form the final module. The advantage of this design is that it is highly adaptable to the shape and size of the battery pack, which can effectively improve the energy density and make it more suitable for irregular or special shape battery spaces. However, this method is relatively complex in the production process and has high costs.

[0004] On the other hand, wound cell modules are manufactured by winding the cell material into a cylindrical or elliptical shape. The significant advantage of this method is its efficient production process, which is particularly suitable for large-scale production. Wound cells excel in mechanical stability, but generally have lower energy density than stacked cells and a more fixed shape, which may limit their application in certain battery pack designs.

[0005] For stacked cells, a common practice is to fit multiple cells tightly together to achieve stacking. However, this design has certain thermal management issues: two fitted cells will generate a lot of heat in the middle, and this heat is difficult to effectively release in a tightly stacked environment. As heat accumulates, it will affect the performance and service life of the battery module. Heat accumulation in the middle of the cell may cause overheating, which in turn triggers thermal runaway. Thermal runaway is a chain reaction in which overheating of one cell causes overheating of adjacent cells, causing the temperature of the entire module to rise sharply. This situation may cause battery damage or even fire. Overheating of the battery may cause structural damage to the internal materials, increasing the risk of short circuits. In extreme cases, this may cause fire or explosion, posing a serious threat to passengers and vehicles. Utility Model Content

[0006] In view of this, it is necessary to provide a heat dissipation structure of a battery cell module and a battery cell module to solve the thermal management problem of the battery cell.

[0007] An embodiment of the present application provides a heat dissipation structure of a battery cell module, and the heat dissipation structure of the battery cell module includes:

[0008] A battery pack, comprising at least two battery cells;

[0009] A housing is formed with a receiving cavity, one side of the housing is provided with a mounting groove communicating with the receiving cavity, and the battery cell group is arranged in the receiving cavity;

[0010] The heat sink has one end that passes through the mounting groove and extends into the accommodating cavity, and the other end that extends to the outside of the shell and is connected to the heat sink. Two adjacent cells in the cell group are in contact with the heat sink.

[0011] In at least one embodiment of the present application, the battery cell group includes:

[0012] A first battery cell is disposed in the accommodating cavity, wherein the first battery cell has a first side;

[0013] A second battery cell is disposed in the accommodating cavity, the second battery cell having a second side, and the second side is adjacent to the first side;

[0014] The heat sink is respectively attached to the first side and the second side to conduct heat generated by the first battery core and the second battery core to the outside.

[0015] In at least one embodiment of the present application, the heat sink has a fitting portion and a heat dissipation portion;

[0016] The two opposite sides of the bonding portion are respectively bonded to the first battery cell and the second battery cell;

[0017] The fitting portion passes through the accommodating cavity and extends into the installation groove;

[0018] One end of the heat dissipation part is fixedly connected to the bonding part, and the other end is bonded to an external heat dissipation device.

[0019] In at least one embodiment of the present application, a direction from the second battery cell to the first battery cell is defined as a first direction;

[0020] The heat dissipation portion includes at least one heat dissipation fin, and the heat dissipation fin is formed by extending from one end of the bonding portion close to the heat dissipation portion along the first direction, and the heat dissipation fin is bonded to an external heat dissipation device.

[0021] In at least one embodiment of the present application, the shell includes a first wall and a second wall opposite to the first wall, the mounting groove is opened on the first wall of the shell, the heat dissipation fin is attached to the first wall, and one end of the attachment portion away from the heat dissipation portion abuts against the second wall.

[0022] In at least one embodiment of the present application, a guide groove is formed on the second wall, the guide groove is connected to the accommodating cavity, and an end of the fitting portion away from the heat dissipation portion is located in the guide groove.

[0023] In at least one embodiment of the present application, a first positioning groove is formed on the shell, the first positioning groove is communicated with the accommodating cavity, and a first positioning portion is formed on the first battery cell, and the first positioning portion is located in the first positioning groove.

[0024] In at least one embodiment of the present application, a second positioning groove is formed on a side of the shell away from the first battery cell, the second positioning groove is connected to the accommodating cavity, a second positioning portion is formed on the second battery cell, and the second positioning portion is located in the second positioning groove.

[0025] In at least one embodiment of the present application, a positioning hole is provided on one side of the housing, and a positioning column is provided on the other side of the housing opposite thereto;

[0026] Wherein, the positioning column of the first shell can be received in the positioning hole of the second shell to fix the two adjacent shells.

[0027] The present application also provides a battery cell module, including the heat dissipation structure of the battery cell module as described above, and the battery cell module further includes:

[0028] A fixing shell, in which the heat dissipation structure of the battery module is accommodated, so as to fix the heat dissipation structure of the battery module.

[0029] Implementing the embodiments of the utility model will have the following beneficial effects:

[0030] The heat dissipation structure of the battery cell module provided above can effectively guide the heat generated in the middle of the battery cell to the heat dissipation member by arranging a heat sink in the middle of the battery cell group, which penetrates the mounting groove and fits with the two adjacent battery cells. This helps to disperse the heat and prevent overheating in the middle of the battery cell group. At the same time, by connecting to an external heat dissipation device, the heat can be released more effectively and the overall heat dissipation effect can be improved. Due to the design of the heat sink, especially between the two adjacent battery cells in the battery cell group, the accumulation of heat in the middle can be effectively reduced. This helps to slow down the occurrence of thermal runaway, avoid the chain reaction caused by overheating of one battery cell, and improve the safety of the battery cell module. By effectively managing heat, reducing the impact of overheating on the internal material structure of the battery cell, and reducing the risk of short circuit, the service life of the battery cell module can be increased. Reducing overheating also helps to reduce the possibility of battery damage, thereby slowing down the aging process of the battery cell. The design of the heat dissipation structure takes into account the adaptability of the shape and size of the battery pack, so it can still provide a high thermal management effect in the stacked battery cell module. This improves the flexibility of the technology in applications with different battery space shapes and size requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a heat dissipation structure of a battery module according to an embodiment;

[0032] Figure 2 An exploded view of a heat dissipation structure of a battery module according to an embodiment;

[0033] Figure 3 is a schematic diagram of a heat sink according to an embodiment;

[0034] Figure 4 is a schematic diagram of a housing according to an embodiment;

[0035] Figure 5 is a schematic diagram of a battery cell module according to an embodiment;

[0036] Figure 6 for Figure 5 The cell module shown is a cross-sectional view along PP.

[0037] Main component symbols

[0038] 100. battery cell module; 10. heat dissipation structure of battery cell module; 11. battery cell group; 111. first battery cell; a111. first side; 1111. first positioning portion; 112. second battery cell; 1121. second positioning portion; a112. second side; 12. shell; 121a. accommodating cavity; 122a. mounting groove; 123. first wall; 124. second wall; 1241a. guide groove; 125a. first positioning groove; 127a. positioning hole; 128. positioning column; 13. heat sink; 131. heat dissipation portion; 1311. heat dissipation fin; 1312a. partition groove; 132. fitting portion; 20. fixing shell; A. first direction. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0040] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0041] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] refer to Figures 1 to 6 , an embodiment of the present application provides a heat dissipation structure 10 of a battery module, comprising:

[0043] The battery cell group 11 includes at least two battery cells;

[0044] The housing 12 is formed with a receiving cavity 121a. A mounting groove 122a communicating with the receiving cavity 121a is formed on one side of the housing 12. The battery cell group 11 is disposed in the receiving cavity 121a.

[0045] The heat sink 13 has one end that passes through the mounting groove 122 a and extends into the accommodating cavity 121 a , and the other end that extends to the outside of the housing 12 to be connected to the heat sink. Two adjacent cells in the cell group 11 fit the heat sink 13 .

[0046] Among them, the battery cell group 11 is composed of at least two battery cells 11. The battery cell is the basic unit of the battery, usually the main body of electrochemical energy storage. The shell 12 is formed with a receiving cavity 121a, that is, a cavity for receiving the battery cell. This shell 12 has a mounting groove 122a on one side, and the groove is connected to the receiving cavity 121a. The mounting groove 122a is located on one side of the shell 12, and is used to allow one end of the heat sink 13 to pass through the mounting groove 122a and extend into the receiving cavity 121a, and fit with the two adjacent battery cells in the battery cell group 11.

[0047] The heat sink 13 may be a sheet structure, and the heat sink 13 may be made of a material with high thermal conductivity, such as aluminum or copper, to effectively conduct the heat generated by the battery cell. The design of the heat sink 13 may be optimized through thermal simulation and experiments to ensure that the heat in the middle of the battery cell group 11 can be quickly transferred to the external heat sink to prevent overheating. The external heat sink may be a cooling fan, a liquid cooling system, or other heat dissipating device.

[0048] The heat dissipation structure 10 of the battery cell module provided above is provided with a heat sink 13 in the middle of the battery cell group 11, and the heat sink 13 passes through the mounting groove 122a and fits with the two adjacent battery cells, so that the heat generated in the middle of the battery cell can be effectively guided to the heat sink 13. This helps to disperse the heat and prevent the problem of overheating in the middle of the battery cell group 11. At the same time, by connecting to an external heat dissipation device, the heat can be released more effectively and the overall heat dissipation effect can be improved. Due to the design of the heat sink 13, especially between the two adjacent battery cells in the battery cell group 11, the accumulation of heat in the middle can be effectively reduced. This helps to slow down the occurrence of thermal runaway, avoid chain reactions caused by overheating of one battery cell, and improve the safety of the battery cell module 100. By effectively managing heat, reducing the impact of overheating on the internal material structure of the battery cell, and reducing the risk of short circuit, the service life of the battery cell module 100 can be increased. Reducing overheating also helps to reduce the possibility of battery damage, thereby slowing down the aging process of the battery cell. The design of the heat dissipation structure takes into account the adaptability of the shape and size of the battery pack, so it can still provide a high thermal management effect in the stacked battery cell module 100. This improves the flexibility of the technology in applications with different battery space shapes and size requirements.

[0049] In one embodiment of the present application, the battery cell group 11 includes:

[0050] The first battery cell 111 is disposed in the accommodating cavity 121a, and the first battery cell 111 has a first side a111;

[0051] The second battery core 112 is disposed in the accommodating cavity 121a. The second battery core 112 has a second side a112, and the second side a112 is adjacent to the first side a111;

[0052] The heat sink 13 is attached to the first side a111 and the second side a112 respectively to transfer the heat generated by the first battery cell 111 and the second battery cell 112 to the outside.

[0053] Among them, the battery cell group 11 includes two battery cells, namely a first battery cell 111 and a second battery cell 112, and the first side a111 of the first battery cell 111 is adjacent to the second side a112 of the second battery cell 112. The heat sink 13 can be a heat sink, which is inserted into the accommodating cavity 121a through the mounting groove 122a, and is respectively fitted with the first side a111 and the second side a112 to form an effective heat dissipation channel. The heat sink 13 effectively conducts the heat generated in the battery cell group 11 to the outside by fitting with the battery cell, thereby improving the efficiency of heat conduction. This structure helps to solve the thermal management problem caused by the close fitting of the battery cells in the stacked battery cell module 100, and reduces the risk of thermal runaway. Through the effective heat dissipation structure, the possibility of fire or explosion caused by overheating of the battery is reduced, thereby improving the safety of electric vehicles.

[0054] In one embodiment of the present application, the heat sink 13 has a fitting portion 132 and a heat dissipation portion 131;

[0055] The two opposite sides of the bonding portion 132 are respectively bonded to the first battery cell 111 and the second battery cell 112;

[0056] The fitting portion 132 passes through the accommodating cavity 121a and extends into the mounting groove 122a;

[0057] One end of the heat dissipation portion 131 is fixedly connected to the bonding portion 132 , and the other end is bonded to an external heat dissipation device.

[0058] Among them, the fitting portion 132 of the heat sink 13 passes through the accommodating cavity 121a to ensure that it is connected to the two battery cells inside the battery cell group 11, and the two sides of the fitting portion 132 are respectively fitted with the first battery cell 111 and the second battery cell 112 to ensure full contact with the surface of the battery cells. One end of the heat sink 131 is fixedly connected to the fitting portion 132 to ensure the stability of the overall structure of the heat sink 13. The other end of the heat sink 131 is fitted with an external heat dissipation device to form a heat dissipation channel. The material of the heat sink 131 can be a material with good thermal conductivity such as aluminum or copper. The heat sink 131 and the fitting portion 132 are made in one piece to ensure the stability of the entire heat sink 13 during operation and avoid loosening or failure of the heat sink 13.

[0059] In one embodiment of the present application, a direction from the second battery cell 112 to the first battery cell 111 is defined as a first direction A;

[0060] The heat dissipation portion 131 includes at least one heat dissipation fin 1311 . The heat dissipation fin 1311 is formed by extending from one end of the bonding portion 132 close to the heat dissipation portion 131 along the first direction A. The heat dissipation fin 1311 is bonded to an external heat dissipation device.

[0061] Among them, in this embodiment, the heat sink fin 1311 is a square sheet structure, the width direction of the heat sink fin 1311 is parallel to the first direction A, one end of the heat sink fin 1311 is fixedly connected to the fitting portion 132, and the other end is connected to an external heat dissipation device. In some embodiments, the heat sink fin 1311 can be one or more. When there are multiple heat sink fins 1311, a separation groove 1312a is formed between two adjacent heat sink fins 1311 to divide the multiple heat sinks 131 into different areas, and different heat dissipation methods are used for areas with different heat levels to more effectively deal with the heat in each area. Such flexibility helps to optimize the thermal management of the entire battery cell module 100. The variable heat dissipation design enables the battery cell module 100 to flexibly cope with the heat in different areas, providing users with a more highly customized solution.

[0062] refer to Figure 4In one embodiment of the present application, the shell 12 includes a first wall 123 and a second wall 124 arranged opposite to the first wall 123, the mounting groove 122a is opened on the first wall 123, the heat dissipation fin 1311 is attached to the first wall 123, and the end of the attachment portion 132 away from the heat dissipation portion 131 abuts against the second wall 124.

[0063] The shell 12 may be square in shape, the first wall 123 and the second wall 124 are arranged opposite to each other, and the mounting groove 122a is provided on the first wall 123 for inserting and fixing the heat sink 13. The heat sink 13 is inserted into the accommodating cavity 121a through the mounting groove 122a, and one end of the fitting portion 132 in the heat dissipation structure, that is, the end away from the heat dissipation portion 131, abuts against the second wall 124. This design provides support for the fitting portion 132 on the second wall 124, ensuring the stability of the entire heat dissipation structure. During installation, the mounting groove 122a is provided on the first wall 123, which is helpful for inserting and fixing the heat sink 13, and improves the convenience of assembly of the entire battery module 100. The staff only needs to pass the heat sink 13 through the mounting groove 122a and abut against the second wall 124 to complete the installation of the heat sink 13. The heat dissipation fins 1311 are fitted with the first wall 123, which is conducive to saving space for the heat sink 13, so as to improve the space utilization rate in the accommodating cavity 121a.

[0064] In one embodiment of the present application, the second wall 124 defines a guide groove 1241 a , which is connected to the accommodating cavity 121 a , and an end of the fitting portion 132 away from the heat dissipation portion 131 is located in the guide groove 1241 a .

[0065] Among them, the shape of the guide groove 1241a is adapted to the shape of the end of the fitting portion 132 away from the heat dissipation portion 131, and the guide groove 1241a is opened on the second wall 124 to guide and position the fitting portion 132. This helps to ensure that the fitting portion 132 can be correctly aligned with the second wall 124 during assembly, thereby improving the accuracy and efficiency of assembly. The end of the fitting portion 132 away from the heat dissipation portion 131 is located in the guide groove 1241a, providing stable support and positioning. This helps to maintain the stability of the entire heat dissipation structure, reduces the risk of loosening or displacement of components due to vibration or other factors during use, and improves the stability of the entire battery module 100.

[0066] In one embodiment of the present application, a first positioning groove 125a is formed on the shell 12 and communicated with the accommodating cavity 121a. A first positioning portion 1111 is formed on the first battery cell 111 and is located in the first positioning groove 125a.

[0067] A second positioning groove is formed on one side of the housing 12 away from the first battery core 111 . The second positioning groove is communicated with the accommodating cavity 121 a . A second positioning portion 1121 is formed on the second battery core 112 . The second positioning portion 1121 is located in the second positioning groove.

[0068] In this embodiment, the housing 12 is provided with first and second positioning grooves (not shown), which are respectively connected to the accommodating cavity 121a. At the same time, the first and second positioning parts 1121 are respectively provided on the first battery cell 111 and the second battery cell 112, and these parts are located in the corresponding positioning grooves. A first positioning groove 125a is provided on the housing 12, which is connected to the accommodating cavity 121a, which helps to position and fix the first battery cell 111. The first positioning part 1111 is located in the first positioning groove 125a, ensuring the correct position of the first battery cell 111 in the accommodating cavity 121a. The first positioning part 1111 is adapted to the shape of the first positioning groove 125a.

[0069] A second positioning groove is provided on the side of the housing 12 away from the first battery cell 111, and the groove is connected to the accommodating cavity 121a, and is used to position and fix the second battery cell 112. The second positioning portion 1121 is located in the second positioning groove, ensuring the correct position of the second battery cell 112 in the accommodating cavity 121a. The shape of the second positioning portion 1121 matches that of the second positioning groove.

[0070] The establishment of the first and second positioning grooves and the cooperation of the first and second positioning parts 1121 ensure the accurate positioning and fixation of the battery cell group 11 in the accommodating cavity 121a, and prevent it from moving or swinging during use. The design of the positioning groove and the positioning part helps to simplify the assembly process of the battery cell group 11 and improve the efficiency and accuracy of the assembly. The design of the positioning groove and the positioning part ensures the correct position of the battery cell group 11 in the battery cell module 100, which helps to ensure the stability and performance of the battery cell module 100.

[0071] In one embodiment of the present application, a positioning hole 127a is provided on one side of the housing 12, and a positioning column 128 is provided on the other side opposite to the housing 12;

[0072] The positioning post 128 of the front shell 12 can be received in the positioning hole 127 a of the rear shell 12 to fix the two adjacent shells 12 .

[0073] In this embodiment, a positioning hole 127a is provided on one side of the housing 12, which is a hole structure for accommodating a positioning column 128. A positioning column 128 is provided on the other side opposite to the housing 12, which is a structure matching the positioning hole 127a. The positioning column 128 of the previous housing 12 is designed to be accommodated in the positioning hole 127a of the next housing 12 so as to establish a firm connection between them. When the positioning column 128 is accommodated in the positioning hole 127a, the two adjacent housings 12 are fixed together to ensure that their relative positions and connections are stable during use. The use of the positioning hole 127a and the positioning column 128 makes the connection between the housings 12 simple and intuitive, which helps to improve the assembly efficiency of the entire battery module 100. By using the positioning hole 127a and the positioning column 128, the structure of the entire battery module 100 is more stable, reducing the risk of relative movement of the housing 12 due to vibration or other factors during use. In addition, this design allows users to adjust the number of batteries according to their actual needs, such as battery life requirements, power requirements or space constraints. Users can freely choose the number of battery cells according to their personalized needs, thereby customizing the battery cell module 100 to better meet their specific application scenarios or performance requirements. This can avoid unnecessary energy waste and improve the efficiency of the battery cell module 100, thereby better meeting users' personalized requirements for electric vehicle performance, endurance, etc.

[0074] refer to Figure 5 and Figure 6 The present application also provides a battery cell module 100, including the heat dissipation structure 10 of the battery cell module as described above, and the battery cell module 100 also includes:

[0075] The fixing shell 20 , in which the heat dissipation structure 10 of the battery module is accommodated, is used to fix the heat dissipation structure 10 of the battery module.

[0076] The battery cell module 100 provided in this embodiment includes the heat dissipation structure 10 of the battery cell module and the fixed shell 20 as described above. The fixed shell 20 is a closed outer shell. The main function of the fixed shell 20 is to accommodate the heat dissipation structure 10 and other related components of the battery cell module, ensure that the heat dissipation part 13 and other related components are effectively installed and fixed, help to fix the structure of the battery cell module 100 as a whole, and improve the mechanical stability of the battery cell module 100.

[0077] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A heat dissipation structure of a battery module, characterized in that: include: A battery pack, comprising at least two battery cells; A housing is formed with a receiving cavity, one side of the housing is provided with a mounting groove communicating with the receiving cavity, and the battery cell group is arranged in the receiving cavity; The heat sink has one end that passes through the mounting groove and extends into the accommodating cavity, and the other end that extends to the outside of the shell and is connected to the heat sink. Two adjacent cells in the cell group are in contact with the heat sink.

2. The heat dissipation structure of the battery module according to claim 1, characterized in that: The battery pack comprises: A first battery cell is disposed in the accommodating cavity, wherein the first battery cell has a first side; A second battery cell is disposed in the accommodating cavity, the second battery cell having a second side, and the second side is adjacent to the first side; The heat sink is respectively attached to the first side and the second side to conduct heat generated by the first battery core and the second battery core to the outside.

3. The heat dissipation structure of the battery module according to claim 2, characterized in that: The heat sink has a fitting portion and a heat dissipation portion; The two opposite sides of the bonding portion are respectively bonded to the first battery cell and the second battery cell; The fitting portion passes through the accommodating cavity and extends into the mounting groove; One end of the heat dissipation part is fixedly connected to the bonding part, and the other end is bonded to an external heat dissipation device.

4. The heat dissipation structure of the battery module according to claim 3, characterized in that: defining a direction from the second battery cell to the first battery cell as a first direction; The heat dissipation portion includes at least one heat dissipation fin, and the heat dissipation fin is formed by extending from one end of the bonding portion close to the heat dissipation portion along the first direction, and the heat dissipation fin is bonded to an external heat dissipation device.

5. The heat dissipation structure of the battery module according to claim 4, characterized in that: The shell includes a first wall and a second wall opposite to the first wall, the mounting groove is provided in the first wall of the shell, the heat dissipation fin is attached to the first wall, and one end of the attachment portion away from the heat dissipation portion abuts against the second wall.

6. The heat dissipation structure of the battery module according to claim 5, characterized in that: The second wall is provided with a guide groove, the guide groove is communicated with the accommodating cavity, and the end of the fitting portion away from the heat dissipation portion is located in the guide groove.

7. The heat dissipation structure of the battery module according to claim 2, characterized in that: The shell is provided with a first positioning groove, the first positioning groove is communicated with the accommodating cavity, the first battery core is provided with a first positioning portion, and the first positioning portion is located in the first positioning groove.

8. The heat dissipation structure of the battery module according to claim 7, characterized in that: A second positioning groove is formed on a side of the shell away from the first battery core, the second positioning groove is communicated with the accommodating cavity, a second positioning portion is formed on the second battery core, and the second positioning portion is located in the second positioning groove.

9. The heat dissipation structure of the battery module according to claim 1, characterized in that: A positioning hole is provided on one side of the shell, and a positioning column is provided on the other side of the shell opposite thereto; Wherein, the positioning column of the first shell can be received in the positioning hole of the second shell to fix the two adjacent shells.

10. A battery cell module, characterized in that: A heat dissipation structure of a battery cell module as claimed in any one of claims 1 to 9, wherein the battery cell module further comprises: A fixing shell, in which the heat dissipation structure of the battery module is accommodated, so as to fix the heat dissipation structure of the battery module.

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