Pole adapter assembly, single battery assembly and battery module

Abstract

The utility model belongs to the field of batteries, and particularly relates to a pole adapter assembly, a single battery assembly and a battery module. The problem of thermal runaway possibly caused by over-high heat at the pole position of a single battery in the existing battery module is solved; the pole adapter assembly comprises a pole adapter main body; a first through groove for mounting a heat transfer tube is formed in the pole adapter main body, and the bottom of the first through groove is fixedly connected with a single battery pole. Each single battery assembly comprises a single battery and a pole adapter assembly fixed on a pole, and the battery module comprises a heat transfer tube and a plurality of single battery assemblies; heat generated by the battery pole is firstly conducted to the pole adapter which is in close contact with the battery pole. And after being conducted to the pole adapter, the heat is further transferred to the heat transfer tube. And the heat is quickly diffused in the heat transfer pipe and is dissipated through heat exchange between the heat transfer pipe and the surrounding environment, so that the heat dissipation of the battery is realized.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically a terminal adapter assembly, a single battery assembly, and a battery module. Background Technology

[0002] Currently, common battery modules (also known as battery packs) are composed of multiple individual cells (which are generally cylindrical or square) connected together in series, parallel, or a combination of series and parallel connections.

[0003] Temperature control of battery modules has always been a hot topic in this field. Most existing battery modules use air cooling or liquid cooling to control the temperature of the entire battery module. However, since the terminals of individual cells in the battery module are the parts with the most concentrated heat, if the local heat of the terminals is too high, it is very likely to cause thermal runaway of the individual cells in the battery module. Utility Model Content

[0004] To address the issue of excessive heat at the terminal position of individual cells in existing battery modules, which could lead to thermal runaway, this invention provides a terminal adapter, a single-cell battery assembly, and a battery module.

[0005] The first aspect of this utility model provides an electrode adapter assembly, which is characterized in that: it includes an electrode adapter body; a first through groove is formed on the electrode adapter body for installing a heat transfer tube, and the bottom of the first through groove is used for fixed connection with the electrode of a single battery cell.

[0006] This invention aims to directly dissipate heat from the battery terminal to achieve better heat dissipation. Specifically, this can be achieved by fixing a heat transfer tube to the terminal. However, existing battery terminals are relatively short, making it difficult to install a structure for fixing the heat transfer tube. Therefore, this invention provides the aforementioned terminal adapter, which is fixed to the terminal to increase its height and serves as the polarity terminal of the battery. This invention features a first through-slot in the terminal adapter for installing the heat transfer tube, which is then fixed to the individual battery terminal via the bottom of the first through-slot.

[0007] The heat generated at the battery terminals is first conducted to the terminal adapter, which is in close contact with them. Because the terminal adapter fits tightly to the terminals, heat can be transferred relatively efficiently from the terminals to the adapter. The first slot in the terminal adapter is used to fix the heat transfer tube, ensuring good thermal contact between the heat transfer tube and the terminal adapter. After heat is conducted to the terminal adapter, it is further transferred to the heat transfer tube. The heat diffuses rapidly within the heat transfer tube and is dissipated through heat exchange with the surrounding environment, thus achieving heat dissipation for the battery.

[0008] Meanwhile, the through-slot design ensures that the heat transfer tube is stably fixed on the electrode adapter, avoiding poor thermal contact between the heat transfer tube and the electrode adapter due to vibration or other factors, thus ensuring the stability and reliability of the heat dissipation effect.

[0009] Furthermore, the inner surface of the first through groove is curved, which is used to tightly fit with the wall of the heat transfer tube. The bottom of the first through groove has a blind hole with a flat bottom, used for welding to the individual battery terminal. The curved structure is easier to adapt to a round tube, allowing for a tight fit when the round tube is inserted into the first through groove. This tight fit effectively increases the contact area between the heat transfer tube and the terminal adapter, thereby improving thermal conductivity. However, the curved structure is more difficult to fix to the battery terminal than a flat structure. To solve this problem while fully utilizing the adaptability of the curved groove bottom to the round tube, this invention provides a blind hole at the bottom of the groove. The bottom of the blind hole is flat, allowing for welding to the terminal. This satisfies the connection requirements between the terminal and the adapter while utilizing the adaptability of the curved surface to the round tube.

[0010] Furthermore, the aforementioned electrode adapter assembly also includes a heat-conducting column. This heat-conducting column is fixed within the blind hole and fits tightly against the inner wall of the blind hole. Its surface away from the bottom of the blind hole is curved to fit tightly against the heat transfer tube wall. When the blind hole is opened and the heat transfer tube is inserted into the first through slot, a significant gap will exist between the heat transfer tube and the blind hole. This gap affects thermal and electrical conductivity. To address this, the present invention fixes a heat-conducting column within the blind hole to fill the gap, improving the thermal conductivity between the heat transfer tube and the electrode adapter, while simultaneously optimizing the electrical conductivity of the electrode adapter.

[0011] Furthermore, the aforementioned electrode adapter assembly also includes an adhesive layer; this adhesive layer is used to be disposed between the heat transfer tube and the heat conduction column, and the first through groove. The adhesive layer can fix the heat transfer tube and prevent it from swaying within the first through groove. In addition, the adhesive layer can achieve more uniform heat conduction at the microscopic level. Compared with traditional solid contact methods, the adhesive layer can better adapt to different surface shapes and roughnesses, ensuring that heat can be transferred more evenly.

[0012] Furthermore, the aforementioned pole adapter assembly also includes a pressure block; the pressure block is used to press the heat transfer tube onto the pole adapter body; in conjunction with the adhesive layer, it further improves the stability of the heat transfer tube, while making the heat transfer tube wall and the adhesive layer adhere more tightly, thus optimizing the heat transfer performance.

[0013] Furthermore, in the depth direction of the first channel, the size of the first channel is larger than the size of the heat transfer tube; in the width direction of the channel, the opening size of the first channel is larger than the size of the rest of the first channel; ensuring that the heat transfer tube can be easily placed into the first channel, reducing the difficulty of installation;

[0014] The pressure block is fixed within the first through groove and located at the opening. A second through groove is formed on the pressure block. The inner surface shape of the second through groove is adapted to the shape of the heat transfer tube wall for a tight fit. This tight fit between the inner surface of the second through groove and the heat transfer tube wall minimizes the gap between them, thereby increasing the contact area and enhancing thermal conductivity. The tight contact also effectively reduces contact resistance and thermal resistance, allowing for more efficient heat transfer.

[0015] Furthermore, a third step structure is provided on the side wall of the first through groove. The step surface is used to cooperate with the pressure block and limit the pressure block in the depth direction of the first through groove. Limiting the pressure block in the depth direction of the first through groove can effectively prevent unnecessary displacement of the pressure block during use.

[0016] Furthermore, the upper surface of the pressure block and the upper surface of the pole adapter body are located on the same plane, serving as the electrical connection surface;

[0017] The orthographic projection area of ​​the electrical connection surface on the horizontal plane is larger than the orthographic projection area of ​​the rest of the main body of the pole adapter on the horizontal plane, ensuring that this type of polarity terminal has a larger electrical connection area, which facilitates connection with external electrical connectors.

[0018] The second aspect of this utility model provides a single-cell battery assembly, including a single-cell battery, characterized in that it further includes the aforementioned terminal adapter assembly fixed on the terminal post of the single-cell battery.

[0019] The third aspect of this utility model provides a battery module, which is characterized in that: it includes a heat transfer pipe and n individual battery modules arranged in the same direction; wherein the individual battery modules are the aforementioned individual battery modules, and n is an integer greater than 1; the heat transfer pipe is installed in the first through slot of each individual battery module.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a terminal adapter, which is fixed to the terminal to increase the height of the terminal and serves as the polarity terminal of the battery. A first through groove is formed on the terminal adapter for installing a heat transfer tube, and the tube is fixed to the individual battery terminal through the bottom of the first through groove.

[0022] The heat generated at the battery terminals is first conducted to the terminal adapter, which is in close contact with them. Because the terminal adapter fits tightly to the terminals, heat can be transferred relatively efficiently from the terminals to the adapter. The first slot in the terminal adapter is used to fix the heat transfer tube, ensuring good thermal contact between the heat transfer tube and the terminal adapter. After heat is conducted to the terminal adapter, it is further transferred to the heat transfer tube. The heat diffuses rapidly within the heat transfer tube and is dissipated through heat exchange with the surrounding environment, thus achieving heat dissipation for the battery.

[0023] Meanwhile, the through-slot design ensures that the heat transfer tube is stably fixed on the electrode adapter, avoiding poor thermal contact between the heat transfer tube and the electrode adapter due to vibration or other factors, thus ensuring the stability and reliability of the heat dissipation effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main body of a pole adapter in Example 1;

[0025] Figure 2 This is a schematic diagram of the main body of another pole post adapter in Example 1;

[0026] Figure 3 This is a schematic diagram of the main body of the pole adapter in Example 2;

[0027] Figure 4 This is an exploded structural diagram of the main body of the pole adapter in Example 3;

[0028] Figure 5 This is a schematic diagram of the main body of the pole adapter in Example 3;

[0029] Figure 6 This is an exploded structural diagram of the main body of the pole adapter in Example 4;

[0030] Figure 7 This is a schematic diagram of the main body of the pole adapter in Example 4;

[0031] Figure 8 This is an exploded structural diagram of the main body of a pole adapter in Example 5;

[0032] Figure 9 This is a schematic diagram of the main body of a pole adapter in Example 5;

[0033] Figure 10 This is a schematic diagram of the main body of another pole post adapter in Example 5;

[0034] Figure 11 This is an exploded structural diagram of the main body of the third type of pole adapter in Example 5;

[0035] Figure 12 This is a schematic diagram of the main body of the third type of pole adapter in Example 5;

[0036] Figure 13 This is a schematic diagram of the structure of a single battery module in Example 6;

[0037] Figure 14 This is a schematic diagram of the battery module in Example 7.

[0038] The attached figures are labeled as follows:

[0039] 1. Terminal adapter assembly; 11. Terminal adapter body; 111. First through groove; 112. Blind hole; 113. Through hole; 12. Heat-conducting pillar; 13. Adhesive layer; 14. Press block; 141. Second through groove; 15. Third step structure; 16. Electrical connection surface; 17. First step structure; 18. Second step structure; 19. Limiting rib; 2. Single cell; 21. Terminal; 3. Single cell assembly; 4. Heat transfer pipe. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of this utility model, it should be noted that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Example 1

[0044] This embodiment is a pole post adapter assembly 1, the structure of which is as follows: Figure 1 and Figure 2 As shown, it includes a terminal adapter body 11, which is used to connect to the terminal 21 of the single cell 2 (including the positive terminal and the negative terminal). The terminal adapter body 11 can improve the problem of excessive local heat in the terminal 21 of the single cell 2.

[0045] The main body 11 of the pole adapter connected to the positive pole or the negative pole has the same structure. In this embodiment, the main body 11 of the pole adapter connected to the positive pole is taken as an example.

[0046] As can be seen from the figure, the main body 11 of the electrode adapter in this embodiment is a columnar structure. It can be made of metal materials with good electrical and thermal conductivity, such as silver, copper, aluminum, etc. However, considering the cost and the electrical and thermal conductivity, aluminum is generally chosen as the material of the main body 11 of the electrode adapter.

[0047] A first through groove 111 for installing the heat transfer tube 4 is opened on the main body 11 of the electrode adapter. The bottom of the first through groove 111 is used to fix and connect to the electrode 21 of the single cell 2.

[0048] In this embodiment, the cross-section of the first through groove 111 is not limited and can be semi-circular (e.g., Figure 1 As shown, the bottom of the groove is curved, and the shape is rectangular (e.g., ...). Figure 2 As shown, the bottom of the trough is a plane, etc.

[0049] Preferably, to improve heat dissipation performance, the cross-section of the first through-slot 111 is adapted to the shape of the heat transfer pipe 4 wall, ensuring that after the heat transfer pipe 4 is installed into the first through-slot 111, its wall fits tightly against the inner surface of the first through-slot 111, increasing the contact area between them. A larger contact area means more area for heat transfer, thereby improving heat dissipation efficiency. Furthermore, the tight fit reduces the presence of air gaps. Air is a poor conductor of heat, and air in gaps hinders heat transfer. By eliminating or reducing these gaps, heat conduction efficiency is improved. Simultaneously, the tight fit between the heat transfer pipe 4 and the first through-slot 111 also increases the stability of the entire structure. In environments with significant vibration or impact, the tight fit prevents the heat transfer pipe 4 from shaking or shifting, thus ensuring the stability of the heat dissipation effect.

[0050] In this embodiment, the bottom of the first through groove 111 is fixedly connected to the terminal post 21 of the single cell 2 by welding (welding here refers to fusion welding). In some other embodiments, the two can also be fixed by screw connection, bonding or other methods, but the connection reliability is lower than that of this embodiment.

[0051] Example 2

[0052] This embodiment is also a pole post adapter assembly 1, the structure of which is as follows: Figure 3 As shown.

[0053] When the bottom of the first through groove 111 is fixedly connected to the terminal post 21 of the single cell 2 by welding, the flat bottom of the groove facilitates welding and fixing with the terminal post 21. Because the flat surface can provide a larger contact area during the welding process, the weld is more secure, ensuring a stable and reliable connection between the terminal post 21 and the terminal post adapter body 11.

[0054] However, the heat transfer tubes 4 typically used are circular tubes (with a circular cross-section). When the flat groove bottom is fitted to a circular tube, there are certain disadvantages. The shape of the flat groove bottom does not match the tube wall shape, making a tight fit difficult to achieve. As a result, in practical applications, the connection between the heat transfer tube 4 and the electrode adapter body 11 may not be tight enough, thus affecting thermal conductivity.

[0055] Compared to a flat groove bottom, a curved groove bottom offers greater advantages in fitting a circular tube. The curved groove bottom adapts to the wall of the circular tube, allowing for a tight fit once the tube is inserted into the first through groove 111. This tight fit effectively increases the contact area between the heat transfer tube 4 and the electrode adapter body 11, thereby improving thermal conductivity. However, it presents disadvantages in welding and fixing. Due to the irregular shape of the curved surface, it is difficult to find stable welding points, increasing the difficulty and instability of the welding process.

[0056] To solve the problem of the arc-shaped groove bottom being difficult to fix to the pole post 21, while fully utilizing the compatibility advantages of the arc-shaped groove bottom with the round tube, such as Figure 3 As shown, in this embodiment, a blind hole 112 is formed at the bottom of the arc-shaped groove. The bottom of the blind hole 112 is flat and can be used for welding and fixing with the pole post 21. This satisfies the connection requirements between the pole post 21 and the pole post adapter body 11, and also improves the compatibility between the arc-shaped groove bottom and the round tube.

[0057] To eliminate welding stress, a through hole 113 can be made at the bottom of the blind hole 112 to pass through the blind hole 112.

[0058] Example 3

[0059] This embodiment is also a pole post adapter assembly 1, the structure of which is as follows: Figure 4 and Figure 5 As shown, this embodiment adds a heat-conducting column 12 based on embodiment 2.

[0060] In Embodiment 2, when the diameter of the blind hole 112 is large, a significant gap will exist between the heat transfer tube 4 and the blind hole 112 after the heat transfer tube 4 is inserted into the first through slot 111. This gap will affect the thermal conductivity between the heat transfer tube 4 and the electrode adapter body 11, reducing heat transfer efficiency; additionally, it may also affect the electrical conductivity of the electrode adapter body 11. To address this, this embodiment employs a method of fixing the heat-conducting column 12. The heat-conducting column 12 is fixed within the blind hole 112 and tightly fitted against the inner wall of the blind hole 112. Its surface away from the bottom of the blind hole 112 is curved to ensure a tight fit with the wall of the heat transfer tube 4. By filling the gap between the blind hole 112 and the heat transfer tube 4 with the heat-conducting column 12, the thermal conductivity between the heat transfer tube 4 and the electrode adapter body 11 is improved, and the electrical conductivity of the electrode adapter body 11 is optimized. Simultaneously, the heat-conducting column 12 also serves to fix the heat transfer tube 4, preventing it from wobbling within the first through slot 111.

[0061] The heat-conducting pillar 12 can be made of metal materials with good electrical and thermal conductivity, such as silver, copper, and aluminum. However, considering both cost and electrical and thermal conductivity, aluminum is generally chosen as the material for the heat-conducting pillar 12.

[0062] Example 4

[0063] This embodiment is also a pole post adapter assembly 1, the structure of which is as follows: Figure 6 and Figure 7 As shown, unlike Embodiment 3, this embodiment adds an adhesive layer 13 on the basis of Embodiment 3. The adhesive layer 13 is disposed on the arc surface of the heat-conducting column 12 and the arc surface of the first through groove 111, and is located between the heat transfer tube 4 and the heat-conducting column 12 and the first through groove 111.

[0064] The adhesive layer 13 is typically made of an adhesive with good thermal conductivity, such as thermal grease or thermal adhesive. Additionally, when the heat transfer tube 4 acts as an electrical connector, the adhesive layer 13 should also have electrical conductivity; that is, such adhesives should possess both thermal and electrical conductivity properties.

[0065] In this embodiment, the adhesive layer 13 has at least the following advantages:

[0066] Firstly, in practical applications, the heat transfer tube 4 and the electrode adapter assembly 1 may be subjected to external forces such as vibration and impact. The adhesive layer 13 has a certain degree of elasticity and buffering performance, which can absorb these external forces, reduce the impact on the connection parts, and thus enhance the stability of the heat transfer tube 4.

[0067] Secondly, the adhesive layer 13 can, to a certain extent, fix the heat transfer tube 4, preventing it from shaking or loosening within the first through groove 111. Especially in environments with high vibration, the adhesive layer 13 can effectively improve the reliability of the connection.

[0068] Thirdly: When the wall of the heat transfer tube 4 and / or the arc surface of the heat conduction column 12 and the first through groove 111 have a certain roughness, it will affect the contact area between them. The adhesive layer 13 can better adapt to the shape and roughness of different surfaces, improve the roughness, and achieve more uniform heat conduction.

[0069] Fourthly, the use of adhesive layer 13 reduces the precision requirements for the processing of structures such as heat transfer tube 4, electrode adapter body 11, and heat conduction pillar 12. Even if the surfaces in contact have a certain degree of roughness or dimensional deviation, adhesive layer 13 can still achieve good thermal conductivity. This reduces processing costs and time, and improves production efficiency.

[0070] Example 5

[0071] This embodiment is also a pole post adapter assembly 1, the structure of which is as follows: Figures 8 to 12As shown, unlike the above embodiments, this embodiment adds a pressure block 14, which can press the heat transfer tube 4 onto the electrode adapter body 11, further improving the stability of the heat transfer tube 4, while ensuring a tighter contact between the heat transfer tube 4 and the electrode adapter body 11, thus improving the thermal conductivity.

[0072] Figure 8 , Figure 9 and Figure 10 Taking the addition of a pressure block 14 as an example, based on Example 4. Figure 11 and Figure 12 Taking the pole adapter body 11 of Embodiment 1 as an example, a pressure block 14 is added.

[0073] from Figures 8 to 12 As can be seen from this embodiment, the structure of the pressure block 14 is adapted to the structure of the opening of the first through groove 111. When a round tube is selected as the heat transfer tube, a second through groove 141 is also provided on the pressure block 14. The shape of the inner surface of the second through groove 141 is adapted to the shape of the tube wall of the heat transfer tube 4.

[0074] In this embodiment, the depth of the first through groove 111 is greater than the size of the heat transfer tube 4, and the width of the first through groove 111 is greater than the size of the other parts. This design provides sufficient space for the installation of the heat transfer tube 4, allowing it to be easily inserted into the first through groove 111, reducing the installation difficulty. The pressure block 14 is fixed in the first through groove 111 and located at the opening. During installation, simply insert the heat transfer tube 4 along the first through groove 111, install the pressure block 14 to the opening of the first through groove 111 until the wall of the heat transfer tube 4 is tightly fitted with the second through groove 141 of the pressure block 14, and then fix the pressure block 14 to the electrode adapter body 11. The installation process is simple and convenient.

[0075] Specifically, welding can be used to fix the two together, such as... Figure 9 As shown, in this embodiment, a first step structure 17 can be provided on two edges of the upper surface of the pressure block 14, wherein the two edges are edges extending along the length direction of the first through groove 111; simultaneously, a second step structure 18 can be provided on two edges of the upper surface of the pole adapter body 11, wherein the two edges are edges close to the first through groove 111 and extending along the length direction of the first through groove 111; after the pressure block 14 is installed to the opening of the first through groove 111, the step surfaces of the first step structure 17 and the second step structure 18 are located on the same plane, and the step surfaces of the first step structure 17 and the second step structure 18 can be fixed by welding. Furthermore, from... Figure 8 and Figure 9It can also be seen that in this embodiment, a third step structure 15 can be provided on the side wall of the first through groove 111. The step surface is used to cooperate with the pressure block 14 and limit the pressure block 14 in the depth direction of the first through groove 111. Limiting the pressure block 14 in the depth direction of the first through groove 111 can effectively prevent unnecessary displacement of the pressure block 14 during use. For example, when subjected to vibration or external impact, the pressure block 14 will not loosen and affect its tight fit with the heat transfer tube 4, thereby ensuring the stability of electrical and thermal conductivity.

[0076] like Figure 10 , Figure 11 and Figure 12 As shown, in this embodiment, the pressure block 14 can also be limited by setting a limiting rib 19 on the pressure block 14 in the depth direction of the first through groove 111, so as to improve the stability of the pressure block 14.

[0077] Specifically, two limiting ribs 19 extending along the length of the first through groove 111 can be respectively provided on the two opposite side walls of the pressure block 14 (the side walls being the side walls parallel to the plane containing the length and height directions of the first through groove 111). Two second step structures 18 are respectively provided on the two edges of the upper end face of the pole adapter body 11, wherein the two edges are edges close to the first through groove 111 and extending along the length of the first through groove 111. After the pressure block 14 is installed to the opening of the first through groove 111, the two limiting ribs 19 are respectively pressed onto the step surfaces of the two second step structures 18, and the limiting ribs 19 and the second step structures 18 are fixed by welding. In this structure, the third step structure 15 may not be provided on the side wall of the first through groove 111. When it is provided, there should be a certain gap between the pressure block 14 and the step surface of the third step structure 15.

[0078] from Figure 9 , Figure 10 and Figure 12 It can also be seen that in this embodiment, the upper surface of the pressure block 14 and the upper surface of the electrode adapter body 11 are located on the same plane, serving as the electrical connection surface 16. The orthographic projection area of ​​the electrical connection surface 16 on the horizontal plane is larger than the orthographic projection area of ​​the rest of the electrode adapter body 11 on the horizontal plane, ensuring that this type of polarity terminal has a larger electrical connection area, which facilitates connection with external electrical connectors. The external electrical connector can be an electrical connector that enables electrical connection between individual battery cells 2, or an electrical connector that enables electrical connection between battery modules.

[0079] The pressing block 14 can be made of metal materials with good electrical and thermal conductivity, such as silver, copper, and aluminum. However, considering the cost and the electrical and thermal conductivity, aluminum is generally chosen as the material for the pressing block 14.

[0080] Example 6

[0081] This embodiment describes a single-cell battery 2 having the terminal adapter assembly 1 described in the above embodiment. For ease of description, in this embodiment, the single-cell battery 2 having the terminal adapter assembly 1 is defined as a single-cell battery assembly 3, and its structure is as follows. Figure 13 As shown, Figure 13 Taking the terminal adapter assembly 1 in Embodiment 5 as an example, it can be seen that a terminal adapter assembly 1 is fixed on each of the two terminals 21 of the single cell 2. The specific fixing method has been described in detail in the above embodiments and will not be repeated here.

[0082] Example 7

[0083] This embodiment is a battery module having the single-cell battery assembly of Embodiment 6, and its structure is as follows. Figure 14 As shown, it includes a heat transfer pipe 4 and 13 individual battery modules 3 arranged in the same direction. In other embodiments, the number of individual battery modules 3 can be adjusted according to actual needs.

[0084] In this embodiment, the heat transfer tube 4 is U-shaped and includes a first tube, a second tube, and a connecting tube. The first tube is fixed in the first through groove 111 of the polar terminal of each individual battery assembly 3 on one side of the battery module. The second tube is fixed in the first through groove 111 of the polar terminal of each individual battery assembly 3 on the other side of the battery module. The two ends of the connecting tube are respectively connected to the ports of the first tube and the second tube on the same side.

[0085] The heat generated by the battery terminal 21 is first conducted to the terminal adapter assembly 1, which is in close contact with it. Because the terminal adapter assembly 1 and the terminal 21 are tightly fitted, heat can be transferred relatively efficiently from the terminal 21 to the terminal adapter assembly 1. After the heat is conducted to the terminal adapter assembly 1, it is further transferred to the heat transfer pipe 4. The heat diffuses rapidly in the heat transfer pipe 4 and is dissipated through heat exchange with the surrounding environment, thereby achieving heat dissipation for the battery module.

Claims

1. A pole adapter assembly, characterized by: The pole post adapter body is provided with a first through slot for installing a heat transfer pipe, and the bottom of the first through slot is used for fixed connection with the monomer battery pole post.

2. The pole lug adapter assembly of claim 1, wherein: The inner surface of the first through slot is an arc surface used for close cooperation with the wall of the heat transfer pipe.

3. The pole lug adapter assembly of claim 2, wherein: The blind hole bottom is a plane used for connection with the monomer battery pole post by welding.

4. The pole lug adapter assembly of claim 3, wherein: The heat conduction column is used for being fixed in the blind hole and closely cooperating with the inner wall of the blind hole.

5. The pole lug adapter assembly of claim 1, wherein: The arc surface of the heat conduction column is used for close cooperation with the wall of the heat transfer pipe. The glue layer is arranged on the arc surface of the heat conduction column and the arc surface of the first through slot.

6. The pole lug adapter assembly of claim 5, wherein: In the depth direction of the first through slot, the size of the first through slot is greater than that of the heat transfer pipe.

7. The pole lug adapter assembly of claim 6, wherein: In the width direction of the through slot, the opening size of the first through slot is greater than the size of the rest of the first through slot. The second through slot is provided with an inner surface shape matched with the shape of the wall of the heat transfer pipe.

8. A single cell assembly comprising a single cell, characterized by: The third step structure is arranged on the side wall of the first through slot, and the step surface is used for cooperation with the pressing block.

9. A battery module, characterized by: The upper end surface of the pressing block is located in the same plane as the upper end surface of the pole post adapter body, and is used as an electric connection surface. The projection area of the electric connection surface on the horizontal plane is greater than the projection area of the rest of the pole post adapter body on the horizontal plane. The pole post adapter assembly is fixed on the monomer battery pole post. The heat transfer pipe is installed into the first through slot of each monomer battery assembly. The heat transfer pipe is installed into the first through slot of each monomer battery assembly.

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