Pole adapter and battery module

Abstract

The utility model provides a pole adapter and a battery module, and mainly solves the problem of thermal runaway possibly caused by over-high heat at the pole position of a single battery in the existing battery module. The pole adapter comprises a pole adapter main body, two through grooves are formed in the pole adapter main body, the pole adapter main body part between the two through grooves is a first electric connection main body, and the pole adapter main body parts on the outer sides of the two through grooves are respectively second electric connection main bodies. After the battery module is constructed, a heat transfer tube can be fixed on the pole adapter of each single battery, and a heat transfer medium flowing cavity is formed at the top of the battery module. According to the battery module, heat generated by the single battery pole is firstly conducted to the pole adapter which is in close contact with the single battery pole, and the pole adapter is directly arranged in the heat transfer medium flowing cavity, so that the pole adapter is in direct contact with the heat transfer medium, the heat exchange of the pole adapter is realized, and the heat exchange efficiency of the battery module is improved.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically a terminal adapter 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. Summary of the Invention

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

[0005] To solve the above problems, the technical solution provided by this utility model is as follows:

[0006] An electrode adapter includes an electrode adapter body; the electrode adapter body has two through slots arranged along the y-direction, each through slot penetrating the electrode adapter body along the x-direction; the portion of the electrode adapter body located between the two through slots is defined as a first electrical connection body, and the portions of the electrode adapter body outside the two through slots are defined as second electrical connection bodies; the two through slots are used to cooperate with a heat transfer tube, so that a heat transfer medium flow cavity is formed between the first electrical connection body and the inner wall of the heat transfer tube; the first electrical connection body has a first electrical connection part, which is used to connect to the electrode of each individual battery cell; at the same time, one of the second electrical connection bodies is connected to a second electrical connection part, which is used to realize the external electrical connection of the individual battery cell.

[0007] Furthermore, the second electrical connection part is a flat plate structure extending along the xy plane, and the first electrical connection body, the second electrical connection body and the second electrical connection part are integrally formed by extrusion process.

[0008] Furthermore, the first electrical connection portion is a blind hole extending along the z-direction on the first electrical connection body, and the bottom of the blind hole is used for fixed connection with the terminal post of the single battery cell; a stress hole is opened at the bottom of the blind hole, and the diameter of the stress hole is smaller than the diameter of the blind hole.

[0009] Furthermore, the first electrical connection portion also includes an electrical connection post located at the bottom of the first electrical connection body and protruding from the first electrical connection body, the blind hole extending to the electrical connection post, and the stress hole penetrating the electrical connection post.

[0010] Furthermore, the first electrical connection body is provided with a functional structure for increasing the heat exchange area.

[0011] Furthermore, the functional structure comprises at least one through hole formed on the first electrical connection body, the through hole penetrating the first electrical connection body along the x-direction to allow the heat transfer medium to pass through.

[0012] A battery module includes a housing, two heat transfer pipes, a baffle mechanism, and n individual battery cells. Each individual battery cell assembly includes a single battery cell and a terminal adapter fixedly connected to the terminal of the single battery cell, where n is an integer greater than 1. Inside the housing, where the n individual batteries are arranged along the x-direction, a first clearance hole corresponding to the terminal of each individual battery cell is provided on the top plate of the housing. The baffle mechanism is located on the top of the housing and has a second clearance hole corresponding to the terminal of each individual battery cell, through which the terminals of each individual battery cell sequentially pass. The first clearance hole is connected to the second clearance hole and the pole adapter; the first clearance hole is fixedly sealed to the top plate area of ​​the outer shell and the single battery shell; two heat transfer tubes are arranged along the y direction, each heat transfer tube extends along the x direction, and the cross-section is U-shaped. The two heat transfer tubes are respectively fastened into the through grooves of each pole adapter located on different sides, forming a heat transfer medium flow cavity between the inner wall of the heat transfer tube and the first electrical connection body; an insulating sealant layer is laid in the glue-blocking mechanism, and at least part of the structure of the pole adapter and the heat transfer tube is located in the insulating sealant layer.

[0013] Furthermore, the adhesive-blocking mechanism includes two adhesive-blocking tubes and multiple adhesive-blocking plates. The two adhesive-blocking tubes are arranged along the y-direction, and each adhesive-blocking tube extends along the x-direction. The cross-section of each adhesive-blocking tube is U-shaped, and the bottom plate of the adhesive-blocking tube is provided with a second clearance hole corresponding to the terminal post of each individual battery. The two adhesive-blocking tubes are respectively located on one side of the terminal post of each individual battery on different sides. The adhesive-blocking plates are provided at the ends of the adhesive-blocking tubes or heat transfer tubes.

[0014] Furthermore, one end of the heat transfer tube is provided with a liquid inlet pipe, and one end of the baffle tube is provided with a liquid outlet pipe, through which the heat transfer medium is transported.

[0015] Furthermore, the electrolyte and / or gas are shared among the individual cells.

[0016] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0017] 1. This utility model provides a terminal adapter, which is fixed to the terminal of a single battery cell to increase the height of the terminal and serves as the polarity terminal of the single battery cell. Simultaneously, a through groove is formed in the terminal adapter for installing a heat transfer tube. A heat transfer medium flow cavity is formed between the main body of the terminal adapter and the inner wall of the heat transfer tube, allowing at least a portion of the terminal adapter structure to directly contact the heat transfer medium. After constructing the battery module, the heat transfer tube can be fixed to the terminal adapter on the same side of each single battery cell. A heat transfer medium flow cavity is formed at the top of the battery module. When the heat transfer medium flows through the heat transfer medium flow cavity, the heat generated by the terminal of the single battery cell is first conducted to the terminal adapter in close contact with it. The terminal adapter is directly placed within the heat transfer medium flow cavity, allowing direct contact between the terminal adapter and the heat transfer medium. The heat transfer medium directly acts on the terminal adapter, achieving heat exchange through the terminal adapter. This provides a shorter heat exchange path, improves the utilization efficiency of the heat transfer medium, and enhances the heat exchange efficiency of the battery module.

[0018] 2. In the electrode adapter of this utility model, the second electrical connection part is a flat plate structure extending along the xy plane. The second electrical connection part of this structure can realize the external electrical connection of the single battery through various methods such as screws and welding, making it more convenient for the single battery to realize external electrical connection. At the same time, the second electrical connection part can also be integrally formed with the first electrical connection body and the second electrical connection body by extrusion process. The integral extrusion molding process reduces the processing steps, significantly improves production efficiency, reduces manufacturing costs, and increases the yield.

[0019] 3. In this utility model of the electrode adapter, the first electrical connection part is a blind hole set on the first electrical connection body. By opening the blind hole, the inner cavity of the blind hole is used as a dedicated connection operation space, making the connection operation more convenient. In addition, the bottom shape of the blind hole matches the top shape of the corresponding electrode, so that the bottom of the blind hole and the top of the electrode can form a large contact surface during connection, effectively increasing the effective contact area during connection and fixation. In terms of heat conduction, the larger contact surface enhances the heat conduction efficiency of the heat transfer interface, further optimizing the heat transfer path from the electrode to the electrode adapter, so that heat can be conducted more efficiently from the electrode to the electrode adapter, laying a good foundation for subsequent heat dissipation through the heat transfer medium, and effectively ensuring the thermal stability of the battery module.

[0020] 4. In this utility model of the terminal adapter, the first electrical connection body is provided with a functional structure for increasing the heat exchange area. A larger heat exchange area means that more heat can be transferred under the same time and conditions. This is crucial for the stable operation of the battery module, effectively preventing problems such as performance degradation and shortened lifespan caused by overheating. At the same time, efficient heat exchange also makes the temperature distribution of each individual cell in the battery module more uniform, reducing the inconsistency in battery performance caused by temperature differences, further improving the stability and reliability of the entire battery module, and ensuring that it can work efficiently and stably under different operating conditions.

[0021] 5. In this utility model, the functional structure of the electrode adapter is that at least one through hole is formed in the first electrical connection body, and the through hole penetrates the first electrical connection body along the x-direction to allow the heat transfer medium to pass through. When the heat transfer medium flows through the electrode adapter body, the through hole allows the heat transfer medium to more fully surround the electrode adapter body. Originally, it could only contact the surface of the electrode adapter body for heat exchange, but now it can achieve internal through heat exchange through the through hole, which greatly improves the amount of heat transfer per unit time and accelerates the heat dissipation speed of the electrode adapter.

[0022] 6. In this utility model battery module, heat transfer pipes are fastened into the through grooves of each terminal adapter located on different sides, forming a sealed heat transfer medium flow cavity. The heat generated by the individual battery during operation is conducted to the heat transfer medium through the terminal adapter, achieving efficient heat dissipation and effectively reducing the overall temperature of the battery module. This reduces battery performance degradation and lifespan shortening caused by high temperatures, ensuring that the battery module maintains good performance and stability under different operating conditions.

[0023] 7. In this utility model battery module, an insulating sealant layer is laid inside the sealant tube, and at least a portion of the terminal adapter and heat transfer tube are located within the insulating sealant layer, thus fixing and sealing the sealant tube. During the operation of the battery module, internal temperature changes may cause water vapor condensation. The insulating sealant layer can isolate external moisture, reduce internal humidity changes, and prevent water droplets from forming on the surface of the heat transfer tube and terminal adapter, thus preventing short circuits and component corrosion caused by condensation. In addition, encasing the heat transfer tube and terminal adapter within the sealant layer makes the connections between components tighter, reducing relative displacement between components under vibration, impact, and other conditions, and enhancing the structural stability of the entire battery module.

[0024] 8. In the battery module provided by this utility model, the electrolyte and / or gas inside each individual battery cell are connected, so that the electrolyte and / or gas of all individual batteries cells are in the same system, reducing the differences between individual batteries cells and improving the consistency between individual batteries cells to a certain extent, thereby improving the cycle life of the battery components to a certain extent. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the pole adapter in Example 1. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the pole adapter in Example 1. Figure 2 ;

[0027] Figure 3 This is a cross-sectional view of the pole adapter in Example 1;

[0028] Figure 4 This is a schematic diagram of the pole adapter in Example 1. Figure 3 ;

[0029] Figure 5 This is a schematic diagram of the pole adapter structure in Example 2;

[0030] Figure 6 This is a schematic diagram of the pole adapter structure in Example 2;

[0031] Figure 7 This is a schematic diagram of the battery module structure in Example 3;

[0032] Figure 8 This is a cross-sectional view of the battery module in Example 3;

[0033] Figure 9 for Figure 8 A magnified view of a portion of the image;

[0034] Figure 10 This is a schematic diagram of the heat transfer tube in Example 3;

[0035] Figure 11 This is a schematic diagram of the rubber-blocking tube in Example 3;

[0036] Figure 12 This is an exploded view of the battery module in Example 3;

[0037] Figure 13 This is a schematic diagram of the battery module assembly process in Example 3. Figure 1 ;

[0038] Figure 14 This is a schematic diagram of the battery module assembly process in Example 3. Figure 2 .

[0039] Reference numerals: 1-Electrode adapter, 2-Single cell, 3-Shell, 4-Heat transfer tube, 5-Glue-blocking tube, 6-Sealing connector, 7-Heat transfer medium flow chamber, 11-Through groove, 12-First electrical connection body, 13-Second electrical connection body, 14-First electrical connection part, 15-Second electrical connection part, 16-Functional structure, 17-Electrolyte connection post, 141-Blind hole, 142-Stress hole, 21-Electrode post, 31-First clearance hole, 32-Electrolyte shared chamber, 33-Gas shared chamber, 41-Inlet pipe, 42-First baffle plate, 51-Second clearance hole, 52-Outlet pipe, 53-Second baffle plate. 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] This invention provides a terminal adapter, mainly used to extend the terminal of a single battery cell to fix a heat transfer tube, enabling heat exchange between the battery module and the heat transfer tube. The adapter has two through slots for installing the heat transfer tube. It also has a first electrical connection and a second electrical connection. The first connection is used to connect to the terminal of each individual battery cell; the second connection is used to achieve external electrical connection to the individual battery cell.

[0044] This utility model also provides a single-cell battery assembly, which includes a single-cell battery and an electrode adapter fixed to the electrode post of the single-cell battery. After multiple single-cell battery assemblies are used to construct a battery module, a heat transfer tube can be fixed on the electrode adapter on the same side of each single-cell battery. At this time, a heat transfer medium flow cavity is formed between the main body of the electrode adapter and the inner wall of the heat transfer tube. A heat transfer medium is injected into the heat transfer medium flow cavity. Part of the structure of the electrode adapter of each single-cell battery is directly placed in the heat transfer medium flow cavity, so that the electrode adapter and the heat transfer medium are in direct contact, realizing heat exchange of the electrode adapter. This heat exchange method has a shorter heat exchange path, and the heat transfer medium acts directly on the electrode adapter, improving the utilization efficiency of the heat transfer medium and improving the heat exchange efficiency of the battery module.

[0045] Example 1

[0046] like Figures 1 to 3 As shown, the electrode adapter 1 provided in this embodiment includes an electrode adapter body; the electrode adapter body is provided with two through grooves 11, which are arranged along the y-direction and each through groove 11 penetrates the electrode adapter body along the x-direction, wherein the x-direction and y-direction are perpendicular; at this time, the part of the electrode adapter body located between the two through grooves 11 is defined as the first electrical connection body 12, and the parts of the electrode adapter body outside the two through grooves 11 are the second electrical connection bodies 13; the first electrical connection body 12 is provided with a first electrical connection part 14, which is used to achieve electrical connection with the electrode 21 of the single cell 2; at the same time, a second electrical connection part 15 is connected to one of the second electrical connection bodies 13, which is used to achieve electrical connection to the outside of the single cell 2. The specific structure of the electrode adapter 1 will be described in detail below.

[0047] The main body of the aforementioned terminal adapter is a columnar structure. The size of this columnar structure can be customized according to the actual application scenario to adapt to different single-cell battery specifications. Specifically, it can be a rectangular block, a hexagonal prism, or a cylinder. In this embodiment, a rectangular block is used as an example to specifically describe the structure of the terminal adapter 1.

[0048] like Figure 1 and Figure 2 As shown, in this embodiment, two parallel through slots 11 are formed on the main body of the electrode adapter. The through slots 11 penetrate the main body of the electrode adapter in the x-direction. The two through slots 11 are used to cooperate with the heat transfer tube 4 extending in the x-direction, so that a heat transfer medium flow cavity 7 is formed between the main body of the electrode adapter and the inner wall of the heat transfer tube 4. The width dimension of the through slot 11 (the dimension in the y-direction) needs to ensure that the corresponding heat transfer tube 4 wall can be embedded, and there is a certain gap between the inner wall of the heat transfer tube 4 and the first electrical connection body 12 to allow the heat transfer medium to flow.

[0049] like Figure 3As shown in the figure, in specific design, the shape of the cross-section of the through groove 11 is mainly adapted to the shape of the tube wall of the heat transfer tube 4 embedded in the through groove 11. It should be noted that the cross-section here is the cross-section obtained by cutting the through groove 11 in the yz plane. For example, as can be seen from the figure, the cross-section of the through groove 11 in this embodiment is rectangular, and correspondingly, the cross-section of the tube wall of the heat transfer tube 4 embedded in the through groove 11 is also rectangular. In this case, the heat transfer tube 4 can be an inverted U-shaped tube. In some other embodiments, the cross-section of the through groove 11 can be arc-shaped, and correspondingly, the cross-section of the tube wall of the heat transfer tube 4 embedded in the through groove 11 is also arc-shaped. For example, a tube with a semi-circular cross-section can be used.

[0050] The aforementioned electrode adapter 1 not only cooperates with the heat transfer tube 4 to form a heat transfer medium flow cavity 7, but also needs to realize the electrical connection function. This electrical connection function includes the electrical connection between the electrode adapter 1 and the electrode 21 of the single cell 2, and also needs to realize the external electrical connection of the single cell 2. The external electrical connection can specifically be the electrical connection between adjacent single cells 2 or the electrical connection between adjacent battery modules.

[0051] In this embodiment, two parallel through slots 11 are formed on the main body of the electrode adapter. The two through slots 11 are arranged at intervals in the y direction. The part of the main body of the electrode adapter located between the two through slots 11 is the first electrical connection body 12, and the parts of the main body of the electrode adapter outside the two through slots 11 are the second electrical connection bodies 13. A first electrical connection part 14 is provided on the first electrical connection body 12, and the electrode adapter 1 is connected to the electrode 21 of the single battery 2 through the first electrical connection part 14. At the same time, a second electrical connection part 15 is connected to one of the second electrical connection bodies 13, and the electrical connection to the outside of the single battery 2 is realized through the second electrical connection part 15.

[0052] like Figure 1 and Figure 2 As shown, the first electrical connection body 12 in this embodiment is also a columnar structure. The first electrical connection part 14 can be a folded edge structure located at the bottom of the first electrical connection body 12, which is welded or bolted to the terminal post 21 of the single battery. The first electrical connection body 12 can also be a mounting hole opened on the first electrical connection body 12. By opening the mounting hole, the terminal post adapter 1 and the terminal post 21 of the single battery 2 are electrically connected. The inner cavity of the mounting hole is used as a dedicated connection operation space, making the connection operation more convenient. Generally, welding or bolting can be used for fixing.

[0053] In this embodiment, as Figure 2 and Figure 3As shown, the first electrical connection portion 14 is a blind hole 141 extending along the z-direction on the first electrical connection body 12. The bottom of the blind hole 141 can be connected to the terminal post 21 of the single cell 2 by welding. The diameter and depth of the blind hole 141 are determined according to actual design requirements. It is necessary to ensure that after the terminal post adapter 1 is connected to the terminal post 21 of the single cell 2, there is sufficient contact area for electrical and thermal conductivity, while also taking into account the stability of the overall structure. The terminal post adapter 1 can be formed by drilling or milling processes during manufacturing.

[0054] Furthermore, the bottom shape of the blind hole 141 matches the top shape of the corresponding terminal post 21. During connection, the bottom of the blind hole 141 and the top of the terminal post 21 can form a large contact surface, effectively increasing the effective contact area during welding or bolting. This not only ensures uniform stress distribution at the connection interface and reduces the risk of connection failure due to stress concentration, but also improves the stability and reliability of the connection. From a process perspective, the height-matched shape of the bottom of the blind hole 141 and the top of the terminal post 21 ensures close contact between the two, which is beneficial for the implementation of the connection process. Especially during laser welding, it can ensure continuous and dense welds, greatly improving conductivity reliability and mechanical connection strength, meeting the requirements of battery modules under complex operating conditions. In terms of heat conduction, the larger contact surface enhances the heat conduction efficiency of the heat transfer interface, further optimizing the heat transfer path from the terminal post 21 to the adapter, allowing heat to be conducted more efficiently from the terminal post 21 to the terminal post adapter 1, laying a good foundation for subsequent heat dissipation through the heat transfer medium, and effectively ensuring the thermal stability of the battery module.

[0055] like Figure 3 and Figure 4 As shown, in order to eliminate welding stress, a stress hole 142 can also be opened at the bottom of the blind hole 141. The stress hole 142 at the bottom of the blind hole 141 is generally small in diameter, and is determined according to the size of the pole post 21 and the welding process. It can effectively release the stress generated during the welding process, prevent the weld from cracking or the connection from deforming due to stress concentration, and improve the reliability and stability of the connection.

[0056] In some other embodiments, the bottom of the mounting hole can be connected to the terminal post 21 of the individual battery via bolts. However, this method has certain disadvantages compared to the welding connection in this embodiment. Bolting requires machining threaded holes at positions corresponding to the terminal post 21 of the individual battery, increasing the machining process and complexity. It also demands high thread precision; any deviation in thread machining will affect the tightness of the connection. Welding, on the other hand, directly fuses the two together, eliminating the need for additional complex thread machining. From a conductivity perspective, bolted connections have gaps at the contact points, which can easily create contact resistance and affect current transmission efficiency. Welding eliminates these gaps, achieving efficient current conduction. In vibration environments, bolted connections are affected by vibration, and the nut may loosen, leading to connection failure. Welding effectively resists vibration, ensuring a stable connection.

[0057] To facilitate the connection between the first electrical connection body 12 and the terminal post 21 of the single battery cell 2, this embodiment may also provide an electrical connection post 17 at the bottom of the first electrical connection body 12, such as... Figure 4 As shown, the electrical connection post 17 is located at the bottom of the first electrical connection body 12 and protrudes from the first electrical connection body 12. At this time, the aforementioned blind hole 141 extends to the electrical connection post 17, and the stress hole 142 penetrates the electrical connection post 17. In this embodiment, the first electrical connection body 12 and the electrical connection post 17 are an integral structure. In this embodiment, the electrical connection post 17 has a columnar structure, and its cross-sectional shape is not specifically limited. It can be a quadrangular prism as shown in the figure, or it can be a cylindrical structure, etc., mainly to adapt to the shape of the electrode post 21 connected to it. When the electrode post 21 of the single cell 2 connected to it has a square structure, the electrical connection post 17 adopts a quadrangular prism structure, which can achieve a larger contact area during connection and ensure good conductivity and connection stability; when the electrode post 21 of the single cell 2 connected to it has a cylindrical structure, the electrical connection post 17 adopts a cylindrical structure, and the two can better match.

[0058] like Figure 1 and Figure 2 As shown, the main body of the electrode adapter on the outer side of the two through slots 11 is the second electrical connection body 13; a second electrical connection part 15 is connected to one of the second electrical connection bodies 13. In this embodiment, the second electrical connection part 15 is a flat plate structure extending along the xy plane. This kind of electrical connection structure can realize the external electrical connection of the single cell 2 through various methods such as threaded connection and welding, which makes it more convenient for the single cell 2 to realize external electrical connection. At the same time, this kind of electrical connection structure can also be integrally formed with the first electrical connection body 12 and the second electrical connection body 13 by extrusion process. The integral extrusion process reduces the processing steps, significantly improves production efficiency, reduces manufacturing costs, and increases the yield.

[0059] Finally, in this embodiment, the electrode adapter 1 can be made of a metal material 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 for the electrode adapter 1, and it can be integrally formed by aluminum extrusion process.

[0060] Example 2

[0061] like Figure 5 and Figure 6 As shown, in order to further improve the heat exchange performance of the above-mentioned pole adapter 1, this embodiment, based on the pole adapter 1 of Embodiment 1, provides a functional structure 16 on the first electrical connection body 12 to increase the heat exchange area. Such functional structure 16 may include dot-shaped pits and protrusions on the outer wall of the first electrical connection body 12, and may also include annular grooves on the outer wall of the first electrical connection body 12, and may also include through holes on the first electrical connection body 12.

[0062] like Figure 5 and Figure 6 As shown in the figure, this embodiment uses a through-hole as an example of functional structure 16. The through-hole penetrates the first electrical connection body 12 along the x-direction, allowing the heat transfer medium to pass through. In practical applications, the size and number of through-holes can be flexibly adjusted according to specific needs, provided that the conductivity of the pole adapter 1 is not affected. Setting through-holes can increase the contact area between the pole adapter body and the heat transfer medium, thereby significantly improving the heat transfer efficiency. When the heat transfer medium flows through the pole adapter body, it can more fully surround the pole adapter body through the through-holes. Previously, the heat transfer medium could only exchange heat with the surface of the pole adapter body through contact; now, internal heat exchange can be achieved through the through-holes, which greatly increases the amount of heat transferred per unit time and accelerates the heat removal speed of the pole adapter 1.

[0063] Example 3

[0064] This embodiment provides a single-cell battery assembly, which includes a single-cell battery 2 and an electrode adapter 1. The single-cell battery 2 includes a battery casing and an electrode assembly and an electrolyte located inside the battery casing. The battery casing is formed by an upper cover assembly, a cylindrical body and a lower cover assembly. The upper cover assembly includes a cover plate and an electrode 21 that is insulated and fixed to the cover plate. The electrode 21 includes a positive electrode and a negative electrode. The electrode adapter 1 from embodiment 1 or embodiment 2 is fixedly installed on both the positive electrode and the negative electrode.

[0065] This utility model fixes the electrode adapter 1 to the electrode 21 of the single cell 2 to increase the height of the electrode 21, and then fixes the heat transfer tube 4 on the electrode adapter 1 to directly dissipate heat from the electrode 21 to obtain a better heat dissipation effect.

[0066] Example 4

[0067] like Figure 7 and Figure 8 As shown, this embodiment provides a battery module, which includes a housing 3, two heat transfer pipes 4, a baffle mechanism, and n individual battery cells; where n is an integer greater than 1; inside the housing 3, where the n individual batteries are arranged along the x-direction, the top plate of the housing 3 has a first clearance hole 31 corresponding to the terminal post 21 of each individual battery cell 2; the terminal post 21 of each individual battery cell 2 is connected to the terminal post adapter 1 through the first clearance hole 31. At this time, the terminal post adapter 1 increases the height of the terminal post 21, and the terminal post adapter 1 and the terminal post 21 together serve as the polarity terminal of the individual battery cell 2. The number of individual batteries cell 2 can be adjusted according to actual needs. The positive terminal connectors (the positive terminal connectors are terminal connectors 1 fixed on the positive terminal 21) of multiple individual battery modules are arranged on one side, forming the total positive terminal of the battery module; the negative terminal connectors (the negative terminal connectors are terminal connectors 1 fixed on the negative terminal 21) of multiple individual batteries 2 are arranged on the other side, forming the total negative terminal of the battery module. In some other embodiments, the arrangement of the terminal connectors 1 of the individual battery 2 can be adjusted according to the overall capacity requirements of the battery module to adjust the series and parallel connection method of each individual battery 2.

[0068] Simultaneously, the first clearance hole 31 corresponds to the top plate area of ​​the outer casing 3 and is fixedly sealed to the casing of the single battery 2, thus sealing the gap between the polarity terminal and the first clearance hole 31. This sealing is typically achieved using a sealing connector 6. The sealing connector 6 is a hollow tube, sleeved on the outside of the polarity terminal of the single battery 2. The bottom of the sealing connector 6 is sealed to the area around the polarity terminal on the upper cover of the single battery 2, and the top of the sealing connector 6 is sealed to the top plate area of ​​the outer casing 3 corresponding to the clearance hole. Welding can be used to achieve this sealing connection.

[0069] like Figure 8 , Figure 9 and Figure 11 As shown, in this embodiment, the adhesive-blocking mechanism includes two adhesive-blocking tubes 5 and multiple adhesive-blocking plates. The two adhesive-blocking tubes 5 are arranged along the y-direction, and each adhesive-blocking tube 5 extends along the x-direction. The cross-section of each adhesive-blocking tube 5 is U-shaped. The bottom plate of the adhesive-blocking tube 5 is provided with a second clearance hole 51 corresponding to the terminal post 21 of each individual battery 2. The two adhesive-blocking tubes 5 are located on different sides of the terminal post 21 of each individual battery 2. The terminal post 21 of each individual battery 2 is connected to the terminal post adapter 1 through the first clearance hole 31 and the second clearance hole 51. The adhesive-blocking plates are disposed at the ends of the adhesive-blocking tubes 5 or heat transfer tubes.

[0070] like Figure 8 , Figure 9 and Figure 10As shown, two heat transfer tubes 4 are arranged along the y-direction, and each heat transfer tube 4 extends along the x-direction with a U-shaped cross-section. They are respectively engaged with the through slots 11 of the electrode adapters 1 located on different sides. In this embodiment, one heat transfer tube 4 is embedded in the through slot 11 of the battery module's positive terminal, and the other heat transfer tube 4 is embedded in the through slot 11 of the battery module's negative terminal. A heat transfer medium flow cavity 7 is formed between the inner wall of the heat transfer tube 4 and the first electrical connection body 12. When the heat transfer tube 4 is embedded in the through slot 11, a certain gap is reserved between the first electrical connection body 12 and the inner wall of the heat transfer tube 4 as the heat transfer medium flow cavity 7. The heat transfer medium in the heat transfer medium flow cavity 7 directly acts on the electrode adapter body, improving the utilization efficiency of the heat transfer medium and improving the heat exchange efficiency of the battery module.

[0071] In this embodiment, for a heat transfer pipe 4 on the same side, the heat transfer medium flows in from one end of the heat transfer pipe 4, flows sequentially through the sub-cavities surrounding all the first electrical connection bodies 12 located within the inner cavity of the heat transfer pipe 4, and flows out from the other end of the heat transfer pipe 4. A portion of the structure of the electrode adapter 1 of each individual battery 2 is directly placed inside the heat transfer medium flow cavity 7. The electrode adapter 1 and the heat transfer medium are in direct contact. In conventional heat exchange methods, heat needs to pass through multiple levels of transfer to achieve exchange. However, in this embodiment, the electrode adapter 1 is directly connected to the heat transfer medium, allowing the heat transfer medium to act directly on the electrode adapter 1 without energy loss in other intermediate stages, significantly improving the utilization efficiency of the heat transfer medium. This means that the same amount of heat transfer medium can play a greater role in heat transfer, greatly improving the efficiency of heat transfer. While improving the utilization efficiency of the heat transfer medium, the heat exchange efficiency of the entire battery module is also greatly improved. The problem of battery performance degradation that might have been caused by untimely heat exchange is solved by this efficient heat exchange design, thus ensuring that the battery module is always in good working condition, extending the battery module's service life and improving its operational stability.

[0072] To prevent the heat transfer medium from overflowing from the heat transfer medium flow cavity 7, the corresponding gaps need to be sealed. Sealing measures can be achieved using sealants that are high-temperature resistant, corrosion-resistant, and have good insulation properties. In this embodiment, an insulating sealant layer is laid on the top plate of the outer casing 3. At least a portion of the structure of the heat transfer pipe 4 and the electrode adapter 1 is located within the insulating sealant layer, achieving the sealing of the first clearance hole 31, the second clearance hole 51, and the corresponding gaps. This effectively prevents leakage of the heat transfer medium, ensuring the integrity and efficiency of the heat transfer medium flow cavity 7, allowing heat to be continuously and stably dissipated through the heat transfer pipe 4 and the heat transfer medium, further improving the heat dissipation performance of the battery module.

[0073] In this embodiment, two adhesive-blocking tubes 5 and multiple adhesive-blocking plates are added to the top of the battery module to ensure the smooth laying of the aforementioned insulating sealant layer. When laying the insulating sealant layer, as follows... Figure 12 and Figure 13 As shown, the first step is to place the glue-blocking tube 5 on the top plate of the outer casing 3 and fix the glue-blocking tube 5 to the top plate of the outer casing 3 with screws. The terminals 21 of each individual battery 2 are connected to the terminal adapter 1 through the first clearance hole 31 and the second clearance hole 51. At this time, insulating sealant is injected into the glue-blocking tube 5. The height of the insulating sealant needs to be slightly greater than the height of the bottom of the through groove 11, that is, there is a certain thickness of insulating sealant at the bottom of the through groove 11 of each terminal adapter 1. Then, as... Figure 14 As shown, the heat transfer tube 4 is fastened into the through groove 11 of each pole adapter 1. At this time, the bottom end of the side wall of the heat transfer tube 4 is inserted into the insulating sealant. Then, the insulating sealant is injected to fill the gap between the heat transfer tube 4 and the sealant-blocking tube 5, forming an insulating sealant layer. The insulating sealant layer fixes and seals the heat transfer tube 4 to prevent the heat transfer medium in the heat transfer medium flow cavity 7 from overflowing.

[0074] To further facilitate the laying of the insulating sealant layer, the baffle plate in this embodiment includes a first baffle plate 42 and a second baffle plate 53. Specifically, the first baffle plate 42 is provided at one end of the heat transfer pipe 4, and the second baffle plate 53 is provided at one end of the baffle pipe 5. In specific manufacturing, the first baffle plate 42 can be integrally manufactured with the heat transfer pipe 4, and the second baffle plate 53 can be integrally manufactured with the baffle pipe 5. This structure can eliminate the need for manufacturing and separate installation of the first baffle plate 42 and the second baffle plate 53, and also reduces the possibility of glue leakage during glue pouring.

[0075] Applying an insulating sealant layer to the top plate of the outer casing 3 provides the following advantages: During battery module operation, internal temperature changes may cause moisture condensation. The insulating sealant isolates external moisture, reduces internal humidity fluctuations, and prevents water droplets from forming on the surfaces of the heat transfer pipe 4 and the terminal adapter 1, thus preventing short circuits and component corrosion caused by condensation. Furthermore, encasing the heat transfer pipe 4 and the terminal adapter 1 within the casing allows for tighter connections between components, reducing relative displacement between components under vibration and impact conditions and enhancing the overall structural stability of the battery module.

[0076] In addition, to facilitate the flow of the heat transfer medium in the heat transfer medium flow cavity 7, this embodiment provides an inlet pipe 41 at one end of the heat transfer tube 4 and an outlet pipe 52 at one end of the baffle tube 5, and the heat transfer medium is transported through the inlet pipe 41 and the outlet pipe 52.

[0077] In addition, this embodiment can also provide through holes in the casings of each individual battery cell 2. In this case, the outer casing 3 has an electrolyte sharing chamber 32 and / or a gas sharing chamber 33. Through these through holes and the electrolyte and gas sharing chambers 32 and 33, electrolyte and / or gas sharing can be achieved between the individual battery cells 2. During the charging and discharging process of the battery module, the distribution of electrolyte and gas has a crucial impact on battery performance. When there are differences between individual battery cells 2, such as different electrolyte concentrations or different gas contents, it will lead to inconsistent battery performance, thus affecting the stability and lifespan of the entire battery module. The electrolyte and gas sharing achieved through the through holes allows the internal environment of each individual battery cell 2 to become more uniform, effectively reducing the differences between individual battery cells 2. This improved uniformity makes the performance of each individual battery cell 2 more consistent during charging and discharging, greatly improving the stability, reliability, and overall performance of this type of battery module, ensuring stable and efficient operation of the battery module under various operating conditions.

Claims

1. A pole adapter, characterized in that, Includes the main body of the pole adapter; The main body of the pole adapter is provided with two through slots, which are arranged along the y direction and each through slot penetrates the main body of the pole adapter along the x direction. The main body of the pole adapter located between the two through slots is defined as the first electrical connection body, and the main bodies of the pole adapter outside the two through slots are respectively the second electrical connection bodies. Two through slots are used to cooperate with the heat transfer tube, so that a heat transfer medium flow cavity is formed between the first electrical connection body and the inner wall of the heat transfer tube; The first electrical connection body is provided with a first electrical connection part, which is used to connect to the terminal of each individual battery cell; at the same time, one of the second electrical connection bodies is connected with a second electrical connection part, which is used to realize the external electrical connection of the individual battery cell.

2. The pole adapter according to claim 1, characterized in that, The second electrical connection part is a flat plate structure extending along the xy plane, and the first electrical connection body, the second electrical connection body and the second electrical connection part are integrally formed by extrusion process.

3. The pole adapter according to claim 1, characterized in that, The first electrical connection portion is a blind hole extending along the z-direction on the first electrical connection body. The bottom of the blind hole is used for fixed connection with the terminal post of a single battery cell. A stress hole is formed at the bottom of the blind hole, and the diameter of the stress hole is smaller than the diameter of the blind hole.

4. The pole adapter according to claim 3, characterized in that, The first electrical connection portion further includes an electrical connection post located at the bottom of the first electrical connection body and protruding from the first electrical connection body, the blind hole extending to the electrical connection post, and the stress hole penetrating the electrical connection post.

5. The pole adapter according to any one of claims 1 to 4, characterized in that, The first electrical connection body is provided with a functional structure for increasing the heat exchange area.

6. The pole adapter according to claim 5, characterized in that, The functional structure is at least one through hole formed on the first electrical connection body, the through hole penetrating the first electrical connection body along the x direction to allow the heat transfer medium to pass through.

7. A battery module, characterized in that, It includes a housing, two heat transfer tubes, a baffle mechanism, and n individual battery modules; the individual battery module includes an individual battery and an electrode adapter fixedly connected to the electrode post of the individual battery, wherein the electrode adapter is the electrode adapter according to any one of claims 1 to 6, where n is an integer greater than 1. Inside a housing containing n individual batteries arranged along the x-direction, a first clearance hole corresponding to the terminal of each individual battery is provided on the top plate of the housing; a glue-blocking mechanism is located at the top of the housing and is provided with a second clearance hole corresponding to the terminal of each individual battery; the terminal of each individual battery is connected to the terminal adapter in sequence through the first clearance hole and the second clearance hole; the area of ​​the top plate of the housing corresponding to the first clearance hole is fixedly sealed to the individual battery housing. Two heat transfer tubes are arranged along the y-direction, and each heat transfer tube extends along the x-direction with a U-shaped cross-section. The two heat transfer tubes are respectively fastened into the through grooves of the pole adapters located on different sides, forming a heat transfer medium flow cavity between the inner wall of the heat transfer tube and the first electrical connection body. An insulating sealant layer is laid inside the adhesive barrier mechanism, and at least part of the structure of the pole adapter and heat transfer tube is located within the insulating sealant layer.

8. The battery module according to claim 7, characterized in that, The adhesive-blocking mechanism includes two adhesive-blocking tubes and multiple adhesive-blocking plates. The two adhesive-blocking tubes are arranged along the y-direction, and each adhesive-blocking tube extends along the x-direction. The cross-section of each adhesive-blocking tube is U-shaped. The bottom plate of the adhesive-blocking tube is provided with a second clearance hole corresponding to the terminal post of each individual battery. The two adhesive-blocking tubes are located on one side of the terminal post of each individual battery on different sides. The adhesive-blocking plates are provided at the ends of the adhesive-blocking tubes or heat transfer tubes.

9. The battery module according to claim 8, characterized in that, One end of the heat transfer tube is provided with a liquid inlet pipe, and one end of the rubber baffle tube is provided with a liquid outlet pipe. The heat transfer medium is transported through the liquid inlet pipe and the liquid outlet pipe.

10. The battery module according to claim 7, characterized in that, The electrolyte and / or gas are shared among the individual cells.

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