A heat exchange member, a heat exchange member assembly, and a battery member

Abstract

This utility model belongs to the field of batteries, specifically a heat exchanger, a heat exchanger assembly, and a battery component. It overcomes the problem of excessive localized heat at the terminals of individual cells in existing battery modules, leading to thermal runaway. The heat exchanger includes a heat exchanger body with a first channel; a groove is formed on the outer wall of the heat exchanger body; the heat exchanger body is inserted into a through-groove on the polarity terminal of the individual cell, and at least a portion of the groove's inner cavity accommodates thermally conductive adhesive. The heat exchanger assembly includes the aforementioned heat exchanger, and the battery component includes the aforementioned heat exchanger assembly and a battery module. Efficient heat dissipation is achieved by fixing the heat exchanger to the polarity terminal. Furthermore, this utility model introduces thermally conductive adhesive to ensure uniform heat transfer between the polarity terminal and the heat exchanger body. Simultaneously, the groove on the outer wall of the heat exchanger body serves as an adhesive reservoir, preventing adhesive overflow, increasing the contact area between the heat exchanger and the adhesive, and improving bonding stability.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically a heat exchanger, a heat exchanger assembly, and a battery component. Background Technology

[0002] Currently, most common battery modules are composed of multiple individual battery cells connected together electrically.

[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 individual cells in the battery module, which will seriously affect the safety and performance of the battery module. Summary of the Invention

[0004] The purpose of this invention is to provide a heat exchanger, a heat exchanger assembly, and a battery component to overcome the problem of excessive local heat at the terminal posts of individual batteries in existing battery modules, which leads to thermal runaway.

[0005] The first aspect of this utility model provides a heat exchanger, including a heat exchanger body, on which n first channels are formed; the first channels extend along the length direction of the heat exchanger body and penetrate both ends of the length direction of the heat exchanger body; wherein n is an integer greater than or equal to 1.

[0006] At least one groove is formed on the outer wall of the heat exchanger body, and the groove extends along the length of the heat exchanger body.

[0007] The aforementioned heat exchanger body is used to snap into the through groove on the polarity terminal of a single battery cell, and there is a gap between the outer wall of the heat exchanger and the inner wall of the through groove. The gap and at least part of the inner cavity of the groove are used to accommodate thermally conductive adhesive.

[0008] This invention achieves efficient heat dissipation by fixing a heat exchange component on the polar terminal (the polar terminal can be a terminal post or an integral structure with a terminal post extension connected to it). The heat generated by the polar terminal of a single battery is conducted to the heat exchange component in close contact with it and dissipated through heat exchange.

[0009] Furthermore, this invention introduces thermally conductive adhesive, which, compared to traditional simple solid contact methods, enhances the thermal conductivity and connection strength between the polar terminals and the heat exchanger body. During assembly, even if there are differences in surface shape and roughness between the outer wall of the heat exchanger body and the mounting part, the thermally conductive adhesive can still fill tightly, ensuring uniform heat transfer between the polar terminals and the heat exchanger body.

[0010] Furthermore, the groove on the outer wall of the heat exchanger body of this invention can at least serve as a glue-receiving groove and has the following functions:

[0011] 1) Anti-overflow adhesive control: During installation, when the heat exchanger is inserted into the through groove, it can accommodate the excess adhesive squeezed out by the heat exchanger, preventing the adhesive from overflowing and causing pollution.

[0012] 2) Enhanced contact efficiency: The groove structure increases the contact area between the heat exchanger and the colloid, strengthens the heat transfer path, and improves the bonding stability by using a larger bonding surface, preventing loosening and falling off during long-term use.

[0013] Furthermore, the heat exchanger body is an electrical conductor, enabling electrical connection between individual cells.

[0014] In this invention, the heat exchanger not only serves as a heat exchange component but also as a busbar to realize the electrical connection between multiple individual cells, which has at least the following advantages:

[0015] Firstly, it eliminates the need for additional dedicated busbars, simplifying the overall structure of battery modules with such heat exchangers (for ease of description, in this utility model, a battery module with a heat exchanger is defined as a battery component); secondly, since the heat exchanger simultaneously performs heat exchange and electrical conduction functions, it reduces the number of components in the battery component, thereby lowering assembly difficulty and cost.

[0016] Furthermore, the outer wall of the heat exchanger body is provided with a stepped structure along its length, and the horizontal surface of the stepped structure serves as a welding part for welding connection with the top end face of the polarity terminal through slot.

[0017] A through-slot is made on the polarity terminal to secure the heat exchanger, ensuring good thermal contact between the heat exchanger and the polarity terminal. After welding, the polarity terminal and the heat exchanger can be tightly bonded together. Compared to other connection methods, such as simple mechanical fixing, welding eliminates the tiny gaps between the connection points, greatly reducing thermal resistance, improving the heat conduction efficiency between the two, and ensuring effective heat transfer. Welding also enhances the stability of the connection, preventing the heat exchanger from separating from the polarity terminal due to vibration or other factors during battery operation, thus affecting the heat dissipation effect.

[0018] In addition, due to the adhesive-containing effect of the groove, excess adhesive will not overflow to the welding area and affect the welding effect during the process of inserting the heat exchanger into the through groove; furthermore, the groove also has the function of eliminating welding stress, further ensuring the reliability and stability of the connection.

[0019] Furthermore, n equals 2, and the two first channels are parallel to each other, with one first channel serving as the liquid inlet channel and the other first channel serving as the liquid outlet channel.

[0020] The second aspect of this utility model provides a heat exchanger assembly, including two heat exchangers as described above; one heat exchanger is used to connect to one side polarity terminal of all individual cells in the battery module, and the other heat exchanger is used to connect to the other side polarity terminal of all individual cells in the battery module; the inner cavity of the first channel in both heat exchangers serves as a liquid cooling medium flow channel.

[0021] If the heat exchanger body is an electrical conductor, one heat exchanger is used to connect to the positive terminal on one side of all individual cells in the battery module, and the other heat exchanger is used to connect to the negative terminal on the other side of all individual cells in the battery module, so as to realize the parallel connection between individual cells; when the inner wall of the liquid cooling medium flow channel is insulated, cooling water can be used as the liquid cooling medium.

[0022] The third aspect of this utility model provides another heat exchange component assembly that can realize the series connection between individual cells in a battery module, and the specific structure is as follows:

[0023] This includes multiple heat exchange components as described above, as well as multiple insulating components;

[0024] The aforementioned insulating component has n second channels, which extend along the length of the insulating component and penetrate both ends of the length of the insulating component;

[0025] Each heat exchanger and each insulating component is connected alternately, and the first channel of each heat exchanger and the second channel of each insulating component correspond to and are connected to each other, forming n liquid cooling medium flow channels (when the inner wall of the liquid cooling medium flow channel is insulated (mainly the inner wall of the first channel is insulated), cooling water can be used as the liquid cooling medium), and heat exchange with the polarity terminal;

[0026] The heat exchanger body is an electrical conductor. Each heat exchanger is used to connect with the polarity terminals of different polarities between adjacent individual cells in the battery module, so as to realize the series connection between individual cells.

[0027] The fourth aspect of this utility model provides a battery component, including the above-mentioned heat exchange component assembly and battery module;

[0028] The aforementioned battery module includes multiple individual cells arranged along a first direction, and each individual cell has a through slot on its polarity terminal.

[0029] The heat exchanger body is inserted into the through groove, and there is a gap between the outer wall of the heat exchanger body and the inner wall of the through groove. The gap and at least part of the inner cavity of the groove contain thermally conductive adhesive.

[0030] Furthermore, the aforementioned battery component also includes a housing; multiple individual cells are arranged inside the housing; the top plate of the housing has clearance holes corresponding to the polarity terminals of each individual cell; the polarity terminals of each individual cell extend out of the corresponding clearance holes, and the area corresponding to each clearance hole on the top plate of the housing is sealed and connected to the top cover plate of the corresponding individual cell.

[0031] Inside the aforementioned casing, the internal cavities of each individual battery cell are interconnected; the electrolyte and / or gas are shared among the individual batteries.

[0032] The heat exchanger body is connected to the portion of each individual battery cell whose polarity terminal extends out of the corresponding clearance hole.

[0033] The electrolyte and / or gas inside each individual cell are interconnected, so that the electrolyte and / or gas of all individual cells are in the same system, reducing the differences between individual cells and improving the consistency between individual cells to a certain extent, thereby improving the cycle life of the battery components to a certain extent.

[0034] Furthermore, the aforementioned battery component also includes a housing with an explosion vent; multiple individual cells are arranged inside the housing; the top plate of the housing has clearance holes corresponding to the polarity terminals of each individual cell; the polarity terminals of each individual cell extend out of the corresponding clearance holes, and the area corresponding to each clearance hole on the top plate of the housing is sealed to the top cover plate of the corresponding individual cell.

[0035] The aforementioned casing is equipped with a venting channel that communicates with the venting port. The venting channel is sealed and covers the venting ports of each individual battery cell, and thermal runaway fumes are discharged in an orderly manner through the venting channel, thereby improving the safety performance of the battery components.

[0036] The heat exchanger body is connected to the portion of each individual battery cell whose polarity terminal extends out of the corresponding clearance hole.

[0037] The beneficial effects of this utility model are:

[0038] This invention achieves efficient heat dissipation by fixing a heat exchange component on the polar terminal (the polar terminal can be a terminal post or an integral structure with a terminal post extension connected to it). The heat generated by the polar terminal of a single battery is conducted to the heat exchange component in close contact with it and dissipated through heat exchange.

[0039] Furthermore, this invention introduces thermally conductive adhesive, which, compared to traditional simple solid contact methods, enhances the thermal conductivity and connection strength between the polar terminals and the heat exchanger body. During assembly, even if there are differences in surface shape and roughness between the outer wall of the heat exchanger body and the mounting part, the thermally conductive adhesive can still fill tightly, ensuring uniform heat transfer between the polar terminals and the heat exchanger body.

[0040] Furthermore, the groove on the outer wall of the heat exchanger body of this invention can at least serve as a glue-receiving groove and has the following functions:

[0041] 1) Anti-overflow adhesive control: During installation, when the heat exchanger is inserted into the through groove, it can accommodate the excess adhesive squeezed out by the heat exchanger, preventing the adhesive from overflowing and causing pollution.

[0042] 2) Enhanced contact efficiency: The groove structure increases the contact area between the heat exchanger and the colloid, strengthens the heat transfer path, and improves the bonding stability by using a larger bonding surface, preventing loosening and falling off during long-term use. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the heat exchanger structure in Example 1;

[0044] Figure 2 This is a partially enlarged structural diagram of the heat exchanger in Example 1;

[0045] Figure 3 This is a cross-sectional view of the heat exchanger in Example 1;

[0046] Figure 4 This is a schematic diagram of the heat exchanger assembly in Example 2;

[0047] Figure 5 This is a schematic diagram of the structure of the first type of battery component in Example 2;

[0048] Figure 6 This is an exploded view of the first type of battery component in Example 2;

[0049] Figure 7 This is a cross-sectional view of the first type of battery component in Example 2;

[0050] Figure 8 This is a schematic diagram of the structure of the third type of battery component in Example 2;

[0051] Figure 9 This is an exploded view of the third type of battery component in Example 2;

[0052] Figure 10 This is a cross-sectional view of the third type of battery component in Example 2;

[0053] Figure 11 This is a first-view structural diagram of the battery pack in Example 2;

[0054] Figure 12 This is a second-view structural diagram of the battery pack in Example 2;

[0055] Figure 13 This is a schematic diagram of the heat exchanger structure in Example 3;

[0056] Figure 14This is a schematic diagram of the heat exchanger assembly in Example 4;

[0057] Figure 15 This is a first-view structural diagram of the battery pack in Example 4;

[0058] Figure 16 This is a second-view structural diagram of the battery pack in Example 4;

[0059] Figure 17 This is a schematic diagram of the heat exchanger assembly in Example 5;

[0060] Figure 18 This is a schematic diagram of the structure of the first type of battery component in Example 5;

[0061] Figure 19 This is a schematic diagram of the structure of the second type of battery component in Example 5;

[0062] Figure 20 This is an exploded view of the second type of battery component in Example 5;

[0063] Figure 21 This is a cross-sectional view of the second type of battery component in Example 5;

[0064] Figure 22 This is a first-view structural diagram of the battery pack in Example 5;

[0065] Figure 23 This is a second-view structural schematic diagram of the battery pack in Example 5;

[0066] Figure 24 This is a schematic diagram of the heat exchanger assembly in Example 6;

[0067] Figure 25 This is a first-view structural diagram of the battery pack in Example 6;

[0068] Figure 26 This is a second-view structural schematic diagram of the battery pack in Example 6.

[0069] The attached figures are labeled as follows:

[0070] 1. Heat exchanger; 11. First channel; 12. Groove; 13. Stepped structure; 14. First heat exchanger; 15. Second heat exchanger; 16. Liquid inlet channel; 17. Liquid outlet channel; 18. First heat exchanger assembly; 19. Second heat exchanger assembly; 2. Single cell; 20. Polar terminal; 21. Terminal post; 22. Terminal post extension; 23. Through slot; 3. Battery module; 4. Housing; 41. Clearance hole; 5. Electrolyte sharing chamber; 6. Gas sharing chamber; 7. Insulating seal; 8. Insulating component; 9. Explosion relief channel. Detailed Implementation

[0071] 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.

[0072] 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.

[0073] 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.

[0074] This utility model relates to a heat exchange component that is inserted into a through slot on the polarity terminal of a single battery cell and exchanges heat with the polarity terminal through liquid cooling to achieve efficient heat dissipation.

[0075] To improve the connection strength between the heat exchanger and the polarized terminal and optimize their thermal conductivity, this invention incorporates a thermally conductive adhesive layer between the heat exchanger and the polarized terminal slot. This adhesive layer tightly adheres to both components, effectively securing the heat exchanger and significantly enhancing installation stability. Furthermore, the adhesive layer significantly improves thermal conductivity. Unlike traditional direct solid-to-solid contact methods, this adhesive layer better adapts to varying surface shapes and roughness. Even at a microscopic scale, where minor unevenness exists on both the heat exchanger and the polarized terminal slot, the adhesive layer's fluidity fills these gaps, creating efficient thermal pathways. This effectively prevents hotspots caused by localized thermal resistance differences, further enhancing the heat dissipation efficiency of the heat exchanger.

[0076] During installation, thermally conductive adhesive is typically applied evenly to the inner wall of the slot for the polarity terminal of the individual battery cell, and then the heat exchanger is inserted. However, when the heat exchanger is inserted into the slot, the thermally conductive adhesive flows under pressure, causing a large amount of adhesive to overflow from the slot opening. This overflowing adhesive not only easily contaminates the battery body and surrounding components, but also, during subsequent welding of the polarity terminal and heat exchanger, if the adhesive flows and spreads to the welding area, it can cause impurities at the welding interface, leading to problems such as incomplete soldering and detachment, severely affecting the welding quality and connection stability.

[0077] To overcome the aforementioned problems, this invention features a groove on the outer wall of the heat exchanger body, serving as a glue-receiving groove. When the heat exchanger is inserted into the polarity terminal slot, the squeezed glue is guided into the groove for storage, preventing glue overflow. Furthermore, the groove structure increases the contact area between the heat exchanger and the glue, enhancing the heat transfer path. Simultaneously, the larger bonding surface improves the bonding stability, preventing loosening and detachment during long-term use.

[0078] The heat exchanger body can be either an electrical conductor or an electrical insulator. If it is an electrical conductor, two types of heat exchanger assemblies can be constructed based on it. These two types of heat exchanger assemblies can realize heat exchange at the polarity terminals and can also realize parallel or series connection between individual cells in the battery module.

[0079] This utility model also discloses a battery component, including a battery module and the aforementioned heat exchanger assembly. The battery module is mainly composed of multiple individual batteries, and the heat exchanger assembly is snapped into the through groove of the polarity terminal of each individual battery. There is a gap between the outer wall of the heat exchanger body and the through groove, and thermally conductive adhesive is filled in at least part of the gap and the inner cavity of the groove.

[0080] It should be noted that:

[0081] 1. The polar terminal described in this utility model can be a single battery terminal post, or it can be an integral structure of a single battery terminal post and a terminal post extension member connected thereto.

[0082] 2. The above-mentioned battery modules may include at least the following four categories:

[0083] Type 1 battery module:

[0084] The first type of battery module includes multiple individual battery cells arranged along a first direction;

[0085] For ease of description, in this utility model, the arrangement direction of the individual battery cells is defined as the x-direction; the height direction of the individual battery cells is defined as the z-direction; and the direction perpendicular to both the x and z directions is defined as the y-direction.

[0086] Second type of battery module:

[0087] The second type of battery module adds at least one electrolyte sharing pipeline to the first type of battery module. Based on the electrolyte sharing pipeline, the electrolyte areas inside the cavities of multiple individual cells are connected to achieve electrolyte sharing, reduce the differences between individual cells, and optimize the cycle performance of the battery module. It may also include a gas sharing pipeline, which connects the gas areas inside the cavities of multiple individual cells to achieve gas balance and further optimize the cycle performance of the battery module.

[0088] Third type of battery module:

[0089] The third type of battery module, based on the first type of battery module, adds a shell, with multiple individual batteries arranged along the x-direction and placed inside the shell cavity.

[0090] The outer casing is equipped with an explosion vent, through which thermal runaway fumes are discharged.

[0091] This utility model does not specifically limit the above-mentioned shell structure, but at least the following two structures can be adopted:

[0092] The first structure includes a first cylinder with open ends (i.e., the port parallel to the yz plane is an open end) and end plates fixed to the two open ends of the first cylinder (i.e., the end plates are parallel to the yz plane).

[0093] The second structure includes a second cylinder with open ends at the top and bottom (i.e., the port parallel to the xy plane is the open end) and a top plate and a bottom plate respectively fixed to the open ends at the top and bottom of the second cylinder (i.e., the top plate and the bottom plate are both parallel to the xy plane, and the bottom plate or the top plate can be an integral structure with the second cylinder).

[0094] The top plate of the outer casing (here, the top plate of the first cylindrical body in the first structure, and the top plate in the second structure) has clearance holes corresponding to the polarity terminals of each individual battery cell; the polarity terminals of each individual battery cell extend out of the corresponding clearance holes, and the area corresponding to each clearance hole on the top plate of the outer casing is sealed to the top cover plate of the corresponding individual battery cell. The area corresponding to the clearance hole can be the wall of the clearance hole, or it can be the area surrounding the clearance hole on the top plate of the outer casing.

[0095] Inside the casing, the internal cavities of each individual cell are interconnected, enabling electrolyte sharing and / or gas balance, thereby reducing the differences between individual cells within the casing and improving the performance of high-capacity individual cells.

[0096] The internal cavities of individual cells can usually be connected through a shared chamber located within the casing.

[0097] It should be noted that:

[0098] The aforementioned shared chamber can be an electrolyte shared chamber, with its inner cavity connected to the inner cavities of each individual battery cell. This shared chamber ensures that each individual battery cell is in a uniform electrolyte environment, guaranteeing electrolyte homogeneity and improving the performance and charge-discharge cycle life of the battery module. The electrolyte shared chamber described here is a liquid channel extending along the length (x-direction) of the casing between the casing's bottom plate and each individual battery cell. This liquid channel can be integrally formed with the casing's bottom plate or formed by providing a support between the lower cover plate of the individual battery cell and the casing's bottom plate. It should be noted that in the first type of casing structure, the casing's bottom plate here is the first cylindrical bottom plate; in the second type of casing structure, the casing's bottom plate here is a base plate.

[0099] The aforementioned shared chamber can also be a gas-sharing chamber located on the top plate of the outer casing, covering the gas inlets on the top of each individual battery cell.

[0100] It should be noted that in the first type of shell structure, the shell top plate here is the first cylinder top plate; in the second type of shell structure, the shell top plate here is the top plate.

[0101] It should also be noted that the gas port here has the following two meanings:

[0102] 1) The gas port is a through hole directly opened on the top cover of the single cell and penetrating the inner cavity of the single cell;

[0103] At this time, the gas-sharing chamber is connected to the gas area of ​​each individual cell through the gas port. Based on the gas-sharing chamber, the gas areas of each individual cell can be connected to achieve gas balance, so that the gas of each individual cell is shared to ensure the consistency of each individual cell and improve the cycle life of the battery module to a certain extent. When any individual cell experiences thermal runaway, the flue gas in the inner cavity of that individual cell enters the gas-sharing chamber and is discharged through the gas-sharing chamber, improving the safety of the battery module.

[0104] 2) The gas port is a vent or explosion-proof port installed on the top cover of the individual battery, and a vent membrane is provided at the vent or explosion-proof port.

[0105] At this time, the gas sharing chamber is used as a venting channel. When the venting membrane at the gas port of any single battery cell is ruptured by the flue gas in the inner cavity, the inner cavity of that single battery cell and the gas sharing chamber are connected, and the flue gas inside is discharged through the gas sharing chamber, thereby improving the safety of the battery module.

[0106] The aforementioned shared chamber can also be a gas-liquid shared chamber. Through a gas-liquid shared chamber, each individual battery cell can be placed in a unified electrolyte environment and gas environment, thereby improving the performance of the battery module and its charge-discharge cycle life.

[0107] Category 4 battery modules:

[0108] The fourth type of battery module is based on the first type of battery module, with the addition of a shell, and multiple individual batteries are arranged along the x-direction and placed in the inner cavity of the shell.

[0109] The outer casing is equipped with an explosion vent, through which thermal runaway fumes are discharged.

[0110] There are no specific limitations on the above-mentioned shell structure; at least the following two structures can be adopted:

[0111] The first structure includes a first cylinder with open ends (i.e., the port parallel to the yz plane is an open end) and end plates fixed to the two open ends of the first cylinder (i.e., the end plates are parallel to the yz plane).

[0112] The second structure includes a second cylinder with open ends at the top and bottom (i.e., the port parallel to the xy plane is the open end) and a top plate and a bottom plate respectively fixed to the open ends at the top and bottom of the second cylinder (i.e., the top plate and the bottom plate are both parallel to the xy plane, and the bottom plate or the top plate can be an integral structure with the second cylinder).

[0113] The top plate of the outer casing (here, the top plate of the first cylindrical body in the first structure, and the top plate in the second structure) has clearance holes corresponding to the polarity terminals of each individual battery cell; the polarity terminals of each individual battery cell extend out of the corresponding clearance holes, and the area corresponding to each clearance hole on the top plate of the outer casing is sealed to the top cover plate of the corresponding individual battery cell. The area corresponding to the clearance hole can be the wall of the clearance hole, or it can be the area surrounding the clearance hole on the top plate of the outer casing.

[0114] Inside the casing, there is a venting channel that communicates with the venting port. The venting channel is sealed and covers the venting ports of each individual battery cell. Thermal runaway fumes are discharged in an orderly manner through the venting channel, improving the safety performance of the battery module.

[0115] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0116] Example 1

[0117] like Figure 1 , Figure 2 and Figure 3 As shown, the heat exchanger 1 in this embodiment includes a heat exchanger body, which is a long columnar structure. Its cross-section is usually designed as rectangular or circular, and the size can be customized according to actual needs.

[0118] In this embodiment, the heat exchanger body is an electrical conductor and can serve as a busbar to realize the electrical connection between the individual cells 2 of the battery component. It 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 exchanger body.

[0119] In this embodiment, a first channel 11 is opened on the heat exchanger body. The first channel 11 extends along the length of the heat exchanger body and passes through both ends of the heat exchanger body, serving as a liquid cooling medium flow channel.

[0120] Since the heat exchanger body in this embodiment is an electrical conductor, an insulating liquid cooling medium can flow directly within the first channel 11, thereby achieving heat exchange at the polarity terminal 20. If water is used as the liquid cooling medium, then the inner wall of the first channel 11 needs to be insulated.

[0121] In some other embodiments, the heat exchanger body may be made of an electrically insulating material and used only as a heat exchange component. Corresponding to this type of heat exchanger 1, any liquid cooling medium may be used to achieve heat exchange of the polarity terminal 20.

[0122] A rectangular groove 12 is made on each of the opposite side walls of the heat exchanger body, and the groove 12 extends along the length of the heat exchanger body; the groove 12 serves as a glue container to hold the excess glue that is squeezed out.

[0123] In other embodiments, the number, position, and cross-sectional shape of the grooves 12 can be adjusted according to actual needs. For example, two grooves 12 with trapezoidal cross-sections can be opened on opposite sidewalls of the heat exchanger body.

[0124] By designing the dimensions of the groove 12, it is possible to simultaneously meet the requirements of "ensuring that the extruded thermally conductive adhesive can be contained" and "not affecting the structural strength of the heat exchanger body".

[0125] If the groove 12 is too narrow or too shallow, it cannot fully accommodate the excess adhesive that is extruded, and the problem of adhesive overflow will still occur. If the groove is too wide or too deep, it will significantly reduce the effective load-bearing cross-sectional area of ​​the heat exchanger body, which will significantly weaken its mechanical properties and make it prone to deformation or even breakage when subjected to external mechanical or thermal stress.

[0126] In order to further improve the connection stability between the heat exchanger body and the polar terminal 20, this embodiment provides a stepped structure 13 on the outer wall of the heat exchanger body along its length direction (x direction), and uses the horizontal surface of the stepped structure 13 as a welding part to weld to the polar terminal 20.

[0127] It should be noted that the horizontal plane of the aforementioned stepped structure 13 refers to the connection surface between the large-diameter section and the small-diameter section of the heat exchanger body in the z-direction.

[0128] By welding, a tight connection can be achieved between the heat exchanger 1 and the polar terminal 20.

[0129] Compared to other connection methods, such as simple mechanical fixing, welding eliminates tiny gaps at the connection points, greatly reducing thermal resistance and significantly improving the heat conduction efficiency between the two components, ensuring effective heat transfer. Simultaneously, welding enhances connection stability, preventing the heat exchanger 1 from separating from the polar terminal 20 due to vibration, impact, or other factors during battery operation, thus avoiding impact on heat dissipation and ensuring continuous and stable operation of the battery component. Furthermore, the groove 12 helps eliminate welding stress during welding, further improving connection stability. In addition, the close contact significantly reduces contact resistance, allowing current to be evenly distributed between the heat exchanger 1 and the polar terminal 20, avoiding localized current concentration or hot spots caused by poor contact.

[0130] Example 2

[0131] like Figure 4 The diagram shown is a structural schematic of the heat exchanger assembly in this embodiment. It can be seen that the heat exchanger assembly in this embodiment includes two heat exchangers 1 as described in Embodiment 1. Each heat exchanger 1 is used to connect to a polarity terminal 20 of the same polarity in the battery component, thereby realizing the parallel connection between the individual cells 2 of the battery component.

[0132] like Figures 5 to 7 As shown, this is the first type of battery component in this embodiment, including battery module 3 and... Figure 4 The heat exchanger assembly is shown. In this embodiment, battery module 3 is the first type of battery module described above.

[0133] As shown in the figure, the battery module 3 in this embodiment includes 12 individual battery cells 2 arranged along the x-direction. In this embodiment, the individual battery cells 2 are prismatic cells, and each individual battery cell 2 has an internal cavity including an electrolyte region and a gas region. In other embodiments, the number of individual battery cells 2 can be adjusted according to actual needs, and the shape of the individual battery cells 2 can also be adjusted according to actual needs.

[0134] Each individual cell 2 has a terminal extension 22 connected to its terminal post 21 as a polarity terminal 20.

[0135] A through groove 23 is provided on the pole extension 22 as a mounting part for the heat exchanger assembly. The through groove 23 extends along the x-direction, that is, the length direction of the through groove 23 is parallel to the x-axis. The inner cavity shape of the through groove 23 is adapted to the cross-sectional shape of the heat exchanger body, which needs to ensure that the heat exchanger 1 is tightly clamped in it, so as to ensure installation stability and also to ensure the heat transfer and electrical conductivity between the heat exchanger 1 and the pole extension 22. As can be seen from the figure, this embodiment uses a rectangular through groove 23, and the cross-section of the heat exchanger body adapted to it is rectangular.

[0136] The specific installation process is as follows: First, connect each terminal extension 22 to the corresponding terminal 21 of the single cell 2. After all terminal extensions 22 are fixed, apply thermally conductive adhesive to the inner wall of each through groove 23. Then, fix the two heat exchangers 1 along the x-direction into the through grooves 23 of each terminal extension 22 on the same side. During this process, the adhesive squeezed by the heat exchanger 1 is guided into the groove 12 for storage. The thermally conductive adhesive layer can be made of silicone thermally conductive adhesive, which is based on silicone polymer and combined with a high thermal conductivity filler material; acrylic thermally conductive adhesive can also be used, which can form a stable thermally conductive adhesive layer in a short time. Finally, weld the heat exchanger 1 to the two side walls of the through groove 23.

[0137] To improve welding quality and connection stability, and to ensure efficient heat conduction and uniform current transmission, in this embodiment, the horizontal plane of the stepped structure 13 on the heat exchanger body is flush with the end face of the side wall of the through groove 23. Welding is performed at the joint between the horizontal plane of the stepped structure 13 and the end face of the side wall of the through groove 23. Figure 7 The region shown in Figure a.

[0138] The step structure 13 is provided on the outer wall of the heat exchanger 1, and the horizontal plane of the step structure 13 is flush with the end face of the side wall of the through groove 23. At the same time, the joint is welded, which has at least the following advantages:

[0139] Improved stability: The stepped structure 13 provides a larger welding contact area, making the welded connection more robust, reducing the risk of connection loosening due to vibration, and improving the overall stability of the battery components.

[0140] Optimize thermal conductivity and electrical conductivity: The horizontal plane of the stepped structure 13 is flush with the side wall end face of the through groove 23, ensuring a tighter contact between the heat exchanger 1 and the pole extension 22, reducing the tiny gaps between the contact interfaces, significantly reducing thermal resistance, and improving thermal conductivity. At the same time, the tight contact between the two significantly reduces the contact resistance, allowing the current to be evenly distributed between the heat exchanger 1 and the pole extension 22, avoiding local current concentration or hot spots caused by poor contact.

[0141] Furthermore, during the welding process, conventional welding operations may damage the heat exchanger structure due to factors such as high temperature and stress concentration, leading to potential leakage problems. The stepped structure 13, however, with its horizontal plane flush with the sidewall end face of the through groove 23, provides an ideal operating plane for laser welding along the z-direction, effectively preventing leakage problems caused by structural damage to the heat exchanger 1 during the welding process. When cooling water flows within the heat exchanger 1, this design effectively prevents cooling water leakage from the joints.

[0142] In this embodiment, the first channel 11 is used as a liquid cooling medium flow channel. When the heat of the electrode post 21 is conducted to the electrode post extension 22, it will be further transferred to the liquid cooling medium in the first channel 11 of the heat exchanger 1 to achieve heat dissipation of the battery module 3.

[0143] Meanwhile, in this embodiment, the entire heat exchanger body is a conductor, the same side pole extension 22 in the battery component has the same polarity, the pole extension 22 located on different sides has opposite polarities, and the two heat exchangers 1 are respectively fixed on the two side pole extensions 22 to realize the parallel connection of multiple single cells 2.

[0144] Therefore, in this embodiment, the heat exchanger 1 not only serves as a heat exchange component but also as a conductor to realize the parallel connection of multiple individual cells 2, which has at least the following advantages:

[0145] Firstly, the elimination of the need for a dedicated busbar simplifies the overall structure of the battery module. In traditional battery modules, heat exchange and conductivity are often handled by different components, requiring complex structural layouts and connection designs. In this embodiment, the heat exchanger 1 integrates both heat exchange and conductivity functions, reducing the need for a dedicated busbar design and making the overall structure of the battery module simpler and more compact, thus reducing design complexity and the probability of errors.

[0146] Secondly, since heat exchanger 1 performs both heat exchange and electrical conduction functions, it reduces the number of components in the battery assembly, thereby lowering assembly difficulty and cost. Previously, separate heat exchange tubes and manifolds were used, resulting in a large number of components, increased procurement costs, and the need for precise installation of each component during assembly, which placed high demands on the assembly workers' skills and resulted in a long assembly time.

[0147] Thirdly, the heat exchanger 1, as a parallel connector, is directly embedded in the through groove 23 of the pole post extension 22, making full use of the space of the pole post extension 22 and avoiding the problem of additional busbars occupying space, which is conducive to improving the integration of battery components.

[0148] Fourthly, as a parallel connector, heat exchanger 1 ensures a more uniform current distribution among multiple individual cells 2, preventing individual cells 2 from overheating and being damaged due to excessive current. Heat exchanger 1 is made of uniform material with good conductivity, and its resistance characteristics are consistent when used as a parallel connector. According to electrical principles, current will be evenly distributed along paths with the same resistance. Therefore, after multiple individual cells 2 are connected in parallel through heat exchanger 1, the current can flow evenly to each individual cell 2, avoiding excessive current in individual cells 2 due to uneven current distribution, which could lead to overheating and damage. This effectively improves the overall performance and stability of the battery module 3.

[0149] In this embodiment, an electrolyte sharing pipeline (which can be defined as a second type of battery component) can also be provided at the bottom of the first type of battery component. The inner cavity of the electrolyte sharing pipeline is connected to the electrolyte area of ​​each individual battery cell 2 to realize electrolyte sharing, reduce the differences between individual battery cells 2, and optimize the cycle performance of the battery component.

[0150] like Figures 8 to 10 As shown, this is the third type of battery component in this embodiment. Its structure differs from that of the first type of battery component in that the battery module 3 is the third type of battery module described above.

[0151] In this embodiment, the third type of battery module arranges 12 individual batteries 2 in the inner cavity of the outer shell 4, and each terminal extension 22 is located outside the outer shell 4. A heat exchanger 1 is fixed on the terminal extension 22 located on the same side. The structure of the terminal extension 22 and its installation structure with the heat exchanger 1 are the same as those of the first type of battery component, and will not be described again here.

[0152] A support extending in the x-direction is provided between the bottom plate of the outer casing 4 and each individual battery cell 2 to form a liquid channel, serving as a shared electrolyte chamber 5.

[0153] On the top plate of the outer casing 4, a boss extending in the x direction may also be provided, and a gas channel is opened on the boss, which serves as a gas sharing chamber 6.

[0154] The installation of such battery components can be achieved through the following process:

[0155] First, place 12 individual batteries 2 inside the outer casing 4, and fix and seal the top plate of the outer casing 4 corresponding to the clearance hole 41 to the top cover plate of the individual battery 2.

[0156] In this embodiment, a sealed connection can be achieved by welding the edge of the clearance hole 41 near the single cell 2 to the top cover plate of the single cell 2 using filler wire welding; alternatively, laser welding can be used to weld the area around each clearance hole 41 on the top plate of the outer casing 4 to the area around the corresponding electrode post 21 on the top cover plate of the single cell 2. Hollow components can also be used to seal the area of ​​the top plate of the outer casing corresponding to the clearance hole 41 to the top cover plate of each single cell 2. Specifically, each hollow component is inserted through the clearance hole 41 and fitted around each electrode post 21. The bottom of the hollow component is laser-welded to the first area of ​​the corresponding single cell 2, and the top of the hollow component is laser-welded to the second area of ​​the top plate of the outer casing 4. The first area is the area around any electrode post 21 in the top cover plate of any single cell 2; the second area is the area corresponding to any clearance hole 41 on the top plate of the outer casing 4. The area corresponding to the clearance hole 41 can be the wall of the clearance hole 41 or the area around the clearance hole 41 on the top plate of the outer casing 4.

[0157] Furthermore, due to the small gap between the terminal 21 of the individual battery 2 and the clearance hole 41, the insulation between the terminal 21 of the individual battery 2 and the top plate of the outer casing 4 may be difficult to ensure. Additionally, if thermal runaway occurs in the individual battery 2, cracks may appear at the weld between the clearance hole 41 and the top cover of the individual battery 2, causing thermal runaway fumes to leak from that location. Therefore, if... Figure 10 As shown, in this embodiment, an insulating seal 7 is provided in the gap between each clearance hole 41 and the pole post 21. The insulating seal 7 can ensure the insulation between the polarity terminal 20 and the top plate of the housing 4. At the same time, even if leakage occurs at the welding position, the insulating seal 7 can also serve as a second barrier to prevent the leakage of thermal runaway flue gas.

[0158] Therefore, after fixing and sealing the top plate of the outer casing 4 corresponding to the clearance hole 41 to the top cover plate of the single cell 2, the insulating seal 7 is set between each clearance hole 41 and the terminal post 21. Then, the terminal post extension 22 is pressed tightly against the insulating seal 7, and finally the terminal post extension 22 is connected to the terminal post 21 of the single cell 2.

[0159] In some other embodiments, the insulating seal 7 may also be an insulating seal layer disposed at the gap between the clearance hole 41 and the pole post 21 by a casting process.

[0160] Finally, the heat exchanger 1 is fixed in the through groove 23 of the pole extension 22.

[0161] like Figure 11 and Figure 12 The diagram shown is a schematic of the battery pack structure in this embodiment, including four battery components arranged along the y-direction (represented in the diagram as being of the above type). Figures 9 to 11 (Taking the battery component shown as an example), in other embodiments, the number of battery components can be adjusted according to actual needs.

[0162] For ease of description, the two heat exchangers 1 on each battery component are defined as the first heat exchanger 14 and the second heat exchanger 15, respectively.

[0163] In the entire battery pack, multiple first heat exchangers 14 are connected in series to form a total liquid inlet path; multiple second heat exchangers 15 are connected in series to form a total liquid outlet path; the end of the total liquid inlet path is connected to the beginning of the total liquid outlet path through an external pipe section.

[0164] After entering the main inlet, the cooling water flows through the first heat exchanger 14 of each battery component in sequence, and then through the outer pipe section, it flows through the second heat exchanger 15 of each battery component in sequence, and flows out from the main outlet.

[0165] This series-connected fluid flow design allows cooling water to flow sequentially through each battery component, carrying away the heat generated by each component. During the cooling water flow, each battery component receives relatively even cooling, avoiding temperature differences caused by insufficient or excessive cooling of some components, and achieving uniform temperature distribution across the entire battery pack.

[0166] In some other embodiments, the heat exchangers 1 may be connected in parallel.

[0167] Example 3

[0168] like Figure 13 As shown, the heat exchanger 1 in this embodiment differs from that in Embodiment 1 in that the heat exchanger body in this embodiment has two mutually isolated first channels 11. One of the first channels 11 serves as the liquid inlet channel 16, and the other first channel 11 serves as the liquid outlet channel 17. The remaining structure is the same as that of the heat exchanger 1 in Embodiment 1, and will not be described again here.

[0169] Example 4

[0170] The structure of the heat exchanger assembly in this embodiment is as follows: Figure 14 As shown, it includes two heat exchangers 1 as in Embodiment 3.

[0171] Similar to Embodiment 2, the battery components adapted to the heat exchanger assembly 1 can also be of three types. The only difference is the heat exchanger 1. The rest of the structure and installation process are the same, and will not be described in detail here.

[0172] like Figure 15 and Figure 16 The diagram shown is a structural schematic of the battery pack from different perspectives in this embodiment. The battery pack includes three battery components arranged along the y-direction (the diagram uses the third type of battery component as an example). In practical applications, the number of battery components can be flexibly adjusted according to specific needs.

[0173] In this embodiment, the liquid inlet channels 16 of the three battery components are connected end to end in sequence to form a total liquid inlet path; similarly, the liquid outlet channels 17 are connected in series to form a total liquid outlet path. The end of the total liquid inlet path is connected to the beginning of the total liquid outlet path through an external pipe section, thus constructing a complete cooling circulation loop.

[0174] The specific cooling process is as follows: Cooling water enters from the main inlet end and flows sequentially through the inlet channel 16 of each heat exchanger 1. Then, its flow direction changes at the outer pipe section, and it flows sequentially through the outlet channel 17 of each heat exchanger 1, finally exiting from the main outlet end. Inside a single heat exchanger 1, the coolant achieves efficient heat exchange through adjacent inlet channels 16 and outlet channels 17, ensuring uniform heat dissipation for each polarity terminal 20. For all heat exchangers 1 in the entire battery pack, the temperature difference between the inlet channel 16 and outlet channel 17 remains stable, effectively overcoming the problem of localized overheating or undercooling at both ends of the battery pack caused by the gradual temperature increase of the coolant during flow in traditional series cooling methods.

[0175] Example 5

[0176] like Figure 17 The diagram shown is a structural schematic of the heat exchanger assembly in this embodiment, which includes multiple heat exchangers 1 as in embodiment 1, and multiple insulating components 8.

[0177] A second channel is opened on each insulating member 8. The second channel extends along the length of the insulating member 8 and passes through both ends of the length of the insulating member 8.

[0178] Each heat exchanger 1 and each insulating component 8 are connected alternately, and the first channel 11 of each heat exchanger 1 and the second channel of each insulating component 8 correspond to and are connected to each other, forming a liquid cooling medium flow channel for heat exchange with the polar terminal 20.

[0179] In this embodiment, each heat exchanger 1 is used to connect to the polarity terminals 20 of different polarities between adjacent individual cells 2 in the battery module 3. An insulating member 8 is disposed between two heat exchangers 1 to effectively isolate adjacent heat exchangers 1 and prevent short circuits. The insulating member 8 is typically made of plastic or rubber materials with good thermal conductivity.

[0180] like Figure 18 As shown, this is the first type of battery component in this embodiment, including battery module 3 and the two heat exchanger assemblies mentioned above. In this embodiment, battery module 3 is the first type of battery module.

[0181] As shown in the figure, the battery module 3 in this embodiment includes 12 individual battery cells 2 arranged along the x-direction. In this embodiment, the individual battery cells 2 are prismatic cells, and each individual battery cell 2 has an internal cavity including an electrolyte region and a gas region. In other embodiments, the number of individual battery cells 2 can be adjusted according to actual needs, and the shape of the individual battery cells 2 can also be adjusted according to actual needs.

[0182] Each individual cell 2 has a terminal extension 22 connected to its terminal post 21 as a polarity terminal 20.

[0183] A through groove 23 for mounting the heat exchanger 1 is provided on the pole extension 22. The through groove 23 extends along the x-direction, that is, the length direction of the through groove 23 is parallel to the x-axis. The inner cavity shape of the through groove 23 is adapted to the cross-sectional shape of the conductor, which needs to be tightly clamped in it to ensure installation stability while also ensuring heat transfer and conductivity between the conductor and the pole extension 22. As can be seen from the figure, this embodiment uses a rectangular through groove 23, and the cross-section of the conductor adapted to it is rectangular.

[0184] Two heat exchanger assemblies extend along the x-direction and are arranged along the y-direction. They are fixed in the through slots 23 of each pole extension 22 located on different sides. Each heat exchanger 1 in each heat exchanger assembly is connected to the polar terminals 20 of different polarities between adjacent single cells 2 to realize the series connection between each single cell 2. The heat exchanger 1 is welded and fixed to the two side walls of the through slot 23.

[0185] The specific installation process is as follows: First, connect each terminal extension 22 to the corresponding terminal 21 of the single cell 2. After all terminal extensions 22 are fixed, apply thermally conductive adhesive to the inner wall of each through groove 23. Then, fix the two heat exchanger assemblies along the x-direction into the through grooves 23 of each terminal extension 22 on the same side, ensuring that each heat exchanger 1 in each heat exchanger assembly is connected to the polarity terminals 20 of different polarities between adjacent single cells 2. During this process, the adhesive squeezed by the heat exchanger 1 is guided into the groove 12 for storage. Finally, weld each heat exchanger 1 to the two side walls of the through groove 23. The welding points are the same as in Example 2, and will not be described again here.

[0186] In this embodiment, the heat exchanger assembly can serve as both a heat exchanger and a busbar, enabling series connection between the individual cells 2. This has at least the following advantages:

[0187] Firstly, the elimination of the need for a dedicated busbar simplifies the overall structure of the battery module. In traditional battery modules, heat exchange and conductivity are often handled by different components, requiring complex structural layouts and connection designs. In this embodiment, the heat exchange component integrates both heat exchange and conductivity functions, reducing the need for a dedicated busbar design. This results in a simpler and more compact overall structure for the battery module, reducing design complexity and the probability of errors.

[0188] Secondly, because the heat exchanger assembly performs both heat exchange and electrical conduction functions, it reduces the number of components in the battery structure, thereby lowering assembly difficulty and cost. Previously, separate heat exchange tubes and manifolds were used, resulting in a large number of components, increased procurement costs, and requiring precise installation of each part during assembly, demanding high skill levels from assembly workers and leading to long assembly times.

[0189] Thirdly, the heat exchange component, as a series connector, is directly embedded in the through groove of the electrode extension component, making full use of the space of the electrode extension component and avoiding the problem of additional busbars occupying space, which is conducive to improving the integration of battery components.

[0190] like Figures 19 to 21 As shown, this is the second type of battery component in this embodiment. Its structure differs from that of the first type of battery component in that the battery module 3 is the fourth type of battery module mentioned above.

[0191] In this embodiment, the fourth type of battery module arranges 12 individual batteries 2 in the inner cavity of the outer shell 4, and each terminal extension 22 is located outside the outer shell 4. A heat exchange component assembly is fixed on the terminal extension 22 located on the same side. The structure of the terminal extension 22 and its installation structure with the heat exchange component 1 are the same as those of the first type of battery component, and will not be described again here.

[0192] On the top plate of the outer casing 4, there is a boss extending in the x direction. An explosion venting channel 9 is opened on the boss. The explosion venting channel 9 seals and covers the explosion venting port of each individual battery 2. When any individual battery 2 experiences thermal runaway, the thermal runaway smoke is discharged in an orderly manner through the explosion venting channel 9 to the explosion venting port. This can effectively prevent the thermal runaway smoke from spreading into the casing and affecting other individual batteries 2, thus preventing the thermal runaway from occurring.

[0193] The installation of such battery components can be achieved through the following process:

[0194] First, place 12 individual batteries 2 inside the outer casing 4, and fix and seal the top plate of the outer casing 4 corresponding to the clearance hole 41 to the top cover plate of the individual battery 2.

[0195] In this embodiment, a sealed connection can be achieved by welding the edge of the clearance hole 41 near the single cell 2 to the top cover plate of the single cell 2 using filler wire welding; alternatively, laser welding can be used to weld the area around each clearance hole 41 on the top plate of the outer casing 4 to the area around the corresponding electrode post 21 on the top cover plate of the single cell 2. Hollow components can also be used to seal the area of ​​the top plate of the outer casing corresponding to the clearance hole 41 to the top cover plate of each single cell 2. Specifically, each hollow component is inserted through the clearance hole 41 and fitted around each electrode post 21. The bottom of the hollow component is laser-welded to the first area of ​​the corresponding single cell 2, and the top of the hollow component is laser-welded to the second area of ​​the top plate of the outer casing 4. The first area is the area around any electrode post 21 in the top cover plate of any single cell 2; the second area is the area corresponding to any clearance hole 41 on the top plate of the outer casing 4. The area corresponding to the clearance hole 41 can be the wall of the clearance hole 41 or the area around the clearance hole 41 on the top plate of the outer casing 4.

[0196] Furthermore, due to the small gap between the terminal 21 of the individual battery 2 and the clearance hole 41, the insulation between the terminal 21 of the individual battery 2 and the top plate of the outer casing 4 may be difficult to ensure. Additionally, if thermal runaway occurs in the individual battery 2, cracks may appear at the weld between the clearance hole 41 and the top cover of the individual battery 2, causing thermal runaway fumes to leak from that location. Therefore, if... Figure 21 As shown, in this embodiment, an insulating seal 7 is provided in the gap between each clearance hole 41 and the pole post 21. The insulating seal 7 can ensure the insulation between the polarity terminal 20 and the top plate of the housing 4. At the same time, even if leakage occurs at the welding position, the insulating seal 7 can also serve as a second barrier to prevent the leakage of thermal runaway flue gas.

[0197] Therefore, after fixing and sealing the top plate of the outer casing 4 corresponding to the clearance hole 41 to the top cover plate of the single cell 2, the insulating seal 7 is set between each clearance hole 41 and the terminal post 21. Then, the terminal post extension 22 is pressed tightly against the insulating seal 7, and finally the terminal post extension 22 is connected to the terminal post 21 of the single cell 2.

[0198] In some other embodiments, the insulating seal 7 may also be an insulating seal layer disposed at the gap between the clearance hole 41 and the pole post 21 by a casting process.

[0199] Finally, the heat exchanger assembly is fixed in the through groove 23 of the pole extension 22.

[0200] like Figure 22 and Figure 23 The diagram shown is a schematic of the battery pack structure in this embodiment, including four battery components arranged along the y-direction (represented in the diagram as being of the above type). Figures 19 to 21 (Taking the battery component shown as an example), in other embodiments, the number of battery components can be adjusted according to actual needs.

[0201] For ease of description, the two heat exchanger assemblies on each battery component are defined as the first heat exchanger assembly 18 and the second heat exchanger assembly 19, respectively.

[0202] In the entire battery pack, multiple first heat exchanger assemblies 18 are connected in series to form a total liquid inlet path; multiple second heat exchanger assemblies 19 are connected in series to form a total liquid outlet path; the end of the total liquid inlet path is connected to the beginning of the total liquid outlet path through an external pipe section.

[0203] After entering the main inlet, the cooling water flows sequentially through the first heat exchanger assembly 18 of each battery component, and then through the external pipe section, flows sequentially through the second heat exchanger assembly 19 of each battery component, and flows out from the main outlet.

[0204] This series-connected fluid flow design allows cooling water to flow sequentially through each battery component, carrying away the heat generated by each component. During the cooling water flow, each battery component receives relatively even cooling, avoiding temperature differences caused by insufficient or excessive cooling of some components, and achieving uniform temperature distribution across the entire battery pack.

[0205] In some other embodiments, the heat exchanger assemblies may be connected in parallel.

[0206] Example 6

[0207] like Figure 24 The diagram shown is a structural schematic of the heat exchanger assembly in this embodiment, which includes multiple heat exchangers 1 as in embodiment 3, and multiple insulating components 8.

[0208] Two isolated second channels are opened on each insulating member 8. The second channels extend along the length of the insulating member 8 and pass through both ends of the length of the insulating member 8.

[0209] Each heat exchanger 1 and each insulating component 8 are connected alternately, and the first channel 11 of each heat exchanger 1 and the second channel of each insulating component 8 correspond to and are connected to each other, forming two liquid cooling medium flow channels (one of which is the liquid inlet channel 16 and the other is the liquid outlet channel 17), which exchange heat with the polar terminal 20.

[0210] In this embodiment, each heat exchanger 1 is used to connect to the polarity terminals 20 of different polarities between adjacent individual cells 2 in the battery module 3. An insulating member 8 is disposed between two heat exchangers 1 to effectively isolate adjacent heat exchangers 1 and prevent short circuits. The insulating member 8 is typically made of plastic or rubber materials with good thermal conductivity.

[0211] Similar to Example 5, the battery components adapted to the heat exchanger 1 described above can also be of two types, the only difference being the heat exchanger assembly, while the rest of the structure is the same, and will not be described in detail here.

[0212] like Figure 25 and Figure 26 The diagram shown is a structural schematic of the battery pack from different perspectives in this embodiment. The battery pack includes four battery components arranged along the y-direction (the diagram uses the second type of battery component as an example). In practical applications, the number of battery components can be flexibly adjusted according to specific needs.

[0213] In this embodiment, for ease of description, the two liquid cooling medium flow channels on each heat exchanger assembly are defined as the inlet channel 16 and the outlet channel 17, respectively. The inlet channels 16 of the four battery components are connected end to end in sequence to form the total inlet path; and the outlet channels 17 are also connected in series in sequence to form the total outlet path. The end of the total inlet path is connected to the beginning of the total outlet path through an external pipe section, thus constructing a complete cooling circulation loop.

[0214] The specific cooling process is as follows: Cooling water enters from the main inlet end and flows sequentially through the inlet channel 16 of each heat exchanger 1. Then, its flow direction changes at the outer pipe section, and it flows sequentially through the outlet channel 17 of each heat exchanger 1, finally exiting from the main outlet end. Inside a single heat exchanger 1, the coolant achieves efficient heat exchange through adjacent inlet channels 16 and outlet channels 17, ensuring uniform heat dissipation for each polarity terminal 20. For all heat exchangers 1 in the entire battery pack, the temperature difference between the inlet channel 16 and outlet channel 17 remains stable, effectively overcoming the problem of localized overheating or undercooling at both ends of the battery pack caused by the gradual temperature increase of the coolant during flow in traditional series cooling methods.

Claims

1. A heat exchanger, characterized in that: The device includes a heat exchanger body, on which n first channels are formed; the first channels extend along the length direction of the heat exchanger body and pass through both ends of the length direction of the heat exchanger body; where n is an integer greater than or equal to 1. At least one groove is formed on the outer wall of the heat exchanger body, and the groove extends along the length direction of the heat exchanger body. The heat exchanger body is used to snap into the through groove on the polarity terminal of the single cell, and there is a gap between the outer wall of the heat exchanger and the inner wall of the through groove. The gap and at least part of the inner cavity of the groove are used to accommodate thermally conductive adhesive.

2. The heat exchanger according to claim 1, characterized in that: The heat exchanger body is an electrical conductor, enabling electrical connection between individual battery cells.

3. The heat exchanger according to claim 2, characterized in that: The outer wall of the heat exchanger body has a stepped structure along its length. The horizontal surface of the stepped structure serves as a welding part for welding connection with the top end face of the polarity terminal slot.

4. The heat exchanger according to any one of claims 1 to 3, characterized in that: The n equals 2, and the two first channels are isolated from each other, with one first channel serving as the liquid inlet channel and the other first channel serving as the liquid outlet channel.

5. A heat exchanger assembly, characterized in that: Includes the heat exchanger as described in any one of claims 1 to 4; One heat exchanger is used to connect to one side of the polarity terminal of all individual cells in the battery module, and the other heat exchanger is used to connect to the other side of the polarity terminal of all individual cells in the battery module. The inner cavity of the first channel in both heat exchangers serves as a flow channel for the liquid cooling medium.

6. The heat exchanger assembly according to claim 5, characterized in that: The heat exchanger body is an electrical conductor; One heat exchanger is used to connect to the positive terminal on one side of all individual cells in the battery module, and the other heat exchanger is used to connect to the negative terminal on the other side of all individual cells in the battery module; thus realizing the parallel connection between the individual cells.

7. A heat exchanger assembly, characterized in that: Includes the heat exchanger as described in any one of claims 1 to 4 and multiple insulating components; The insulating member has n second channels, which extend along the length of the insulating member and penetrate both ends of the length of the insulating member; Each heat exchanger and each insulating component is connected alternately, and the first channel of each heat exchanger and the second channel of each insulating component correspond to each other and are connected, forming n liquid cooling medium flow channels. The heat exchanger body is an electrical conductor, and each heat exchanger is used to connect with the polarity terminals of different polarities between adjacent individual cells in the battery module to realize the series connection between individual cells.

8. A battery component, characterized in that: Includes the heat exchanger assembly and battery module as described in any one of claims 5 to 7; The battery module includes multiple individual cells arranged along a first direction, and each individual cell has a through slot on its polarity terminal. The heat exchanger body in the heat exchanger assembly is inserted into the through groove, and there is a gap between the outer wall of the heat exchanger body and the inner wall of the through groove. The gap and at least part of the inner cavity of the groove on the outer wall of the heat exchanger body contain thermally conductive adhesive.

9. The battery component according to claim 8, characterized in that: It also includes a housing; multiple individual batteries are arranged inside the housing; the top plate of the housing has clearance holes corresponding to the polarity terminals of each individual battery; the polarity terminals of each individual battery extend out of the corresponding clearance holes, and the area corresponding to each clearance hole on the top plate of the housing is sealed and connected to the top cover plate of the corresponding individual battery. Inside the outer casing, the internal cavities of each individual battery cell are interconnected; the electrolyte and / or gas are shared among the individual batteries. The heat exchanger body is connected to the portion of each individual battery cell whose polarity terminal extends out of the corresponding clearance hole.

10. The battery component according to claim 8, characterized in that: It also includes an outer casing with a vent; multiple individual batteries are arranged inside the casing; the top plate of the casing has clearance holes corresponding to the polarity terminals of each individual battery; the polarity terminals of each individual battery extend out of the corresponding clearance holes, and the area corresponding to each clearance hole on the top plate of the casing is sealed to the top cover of the corresponding individual battery. The outer casing is provided with an explosion vent channel that communicates with the explosion vent. The explosion vent channel is sealed and covers the explosion vent of each individual battery cell, and the thermal runaway flue gas is discharged in an orderly manner through the explosion vent channel. The heat exchanger body is connected to the portion of each individual battery cell whose polarity terminal extends out of the corresponding clearance hole.

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