A pole, a pole extension, a single cell assembly, and a battery member

Abstract

The utility model belongs to the battery field, concretely is a kind of pole, pole extension piece, single cell battery assembly and battery component.Overcome the problems such as connection difficulty of traditional low-height pole.Pole, including pole body, installation hole is set up on pole body;Pole extension piece includes pole extension piece body and electric connection column;Electric connection column is used to insert the installation hole on pole body, and is connected with pole body, after connection, pole extension piece top end is higher than pole body top end, forms a new, height is significantly increased connecting component, effectively solves many problems that traditional low-height pole faces when connecting.

Description

Technical Field

[0001] This utility model belongs to the field of batteries, specifically a terminal post, a terminal post extension, a single cell battery assembly, and a battery component. Background Technology

[0002] In the field of batteries, the terminals are key components that connect the battery to the external circuit. Their performance and structural design have a crucial impact on the overall performance and safety of the battery.

[0003] In practical applications, the height of traditional battery terminals is generally too low. This inherent structural defect causes many inconveniences in the connection and fixing of battery modules. For example, when building battery modules, terminals that are too low make it difficult to achieve a firm and efficient connection with other components, which greatly reduces the stability and reliability of the entire battery system. Under long-term use or complex operating conditions, loose connections are prone to occur, affecting power transmission efficiency and even causing faults such as open circuits. Summary of the Invention

[0004] The purpose of this invention is to provide a terminal post, a terminal post extension, a single battery cell assembly, and a battery component to overcome the connection difficulties and other problems existing in traditional low-height terminal posts.

[0005] The first aspect of this utility model provides an electrode post, including an electrode post body, on which an installation hole is formed; the installation hole is used for inserting a portion of the structure of an electrode post extension member to realize the connection between the electrode post body and the electrode post extension member, and the top end of the electrode post extension member is higher than the top end of the electrode post body.

[0006] This invention utilizes mounting holes on the electrode post body. During actual assembly, only a portion of the electrode post extension component needs to be inserted into these holes for rapid initial positioning, eliminating the need for complex installation processes and specialized tools. This significantly improves production efficiency and lays a solid foundation for large-scale production. After insertion, reliable fixing methods such as interference fit, welding, and threaded connection can be selected according to actual needs to firmly integrate the electrode post and extension component into a single unit, forming a new, significantly taller connecting component. This effectively solves many problems encountered when connecting traditional low-height electrodes.

[0007] Furthermore, the edges of the aforementioned mounting holes serve as welding sections for welding connections with the pole extension. Compared to interference fits and threaded connections, welding eliminates gaps between components, preventing loosening due to vibration, external forces, or other factors. This significantly improves the tensile and shear strength of the overall structure, ensuring stable and reliable operation of the connected components under complex working conditions.

[0008] The second aspect of this utility model provides a pole extension member for connecting to the aforementioned pole; it includes a pole extension member body and an electrical connection post; the electrical connection post is located at the bottom of the pole extension member body and protrudes from the pole extension member body; the electrical connection post is used to insert into a mounting hole on the pole extension member body and connect to the pole extension member body.

[0009] Based on the shaft-hole mating structure, in actual production assembly, operators can quickly insert the electrical connection post of the pole extension into the mounting hole of the pole body without complicated operating skills and professional tools, which greatly reduces the assembly difficulty and improves the assembly efficiency, making it suitable for the rapid assembly needs of large-scale industrial production.

[0010] Furthermore, the aforementioned pole extension body is provided with a heat transfer component mounting structure for mounting heat transfer components to realize heat exchange of the pole extension.

[0011] Traditional low-height terminals are limited by space, making it difficult to install heat transfer components. This results in the inability to dissipate heat generated during battery charging and discharging, severely impacting battery performance and lifespan. The terminal extension of this invention effectively increases the terminal height, making it possible to directly install heat transfer components on the extension. This improvement significantly enhances battery thermal management efficiency, promptly dissipating heat and effectively preventing overheating. This substantially slows battery aging, extends battery life, and greatly reduces the risk of thermal runaway, ensuring equipment and personnel safety and providing strong support for stable battery operation under various complex conditions.

[0012] Furthermore, the above-mentioned heat transfer component mounting structure can adopt at least the following two structures:

[0013] The first type is a first through groove opened on the body of the pole extension member, the inner cavity of the first through groove being used to hold the tubular heat transfer component.

[0014] A first through slot is formed on the terminal extension to hold the tubular heat transfer component, ensuring good thermal contact between the heat transfer component and the terminal extension. After heat is conducted to the terminal extension, it is further transferred to the heat transfer component. The heat rapidly diffuses within the heat transfer component and is dissipated through the heat transfer medium within the component's cavity and through heat exchange with the surrounding environment, thus achieving heat dissipation for the battery.

[0015] The second type is two second through slots opened on the pole extension body. The two second through slots are arranged along the second direction, and each second through slot penetrates the pole extension body along the first direction.

[0016] The portion of the pole extension body located between the two second through slots is defined as the first portion of the pole extension body.

[0017] Two second through slots are used to fix the heat transfer component, and the first part of the pole extension body is placed in the inner cavity of the heat transfer component; wherein the first direction and the second direction are perpendicular to each other.

[0018] This invention features two second through slots on the electrode extension member for mounting heat transfer components (these heat transfer components are also tubular, with second clearance openings on their tube walls). After embedding the two second through slots into the tube walls on both sides of the heat transfer component, the first part of the electrode extension member body is placed in the inner cavity of the heat transfer component, directly contacting the heat transfer medium flowing within the heat transfer component. The heat transfer medium directly acts on the electrode extension member, achieving heat exchange within the electrode extension member. This design features a shorter heat exchange path, improving the utilization efficiency of the heat transfer medium and enhancing the battery's heat exchange efficiency.

[0019] A third aspect of this utility model provides a single-cell battery assembly, including a single-cell battery and the aforementioned terminal extension member; the single-cell battery includes the aforementioned terminal.

[0020] The electrical connection post on the aforementioned terminal extension is inserted into the mounting hole on the terminal body and connected to the terminal body; the top of the terminal extension is higher than the top of the terminal body; and the bottom of the terminal extension maintains a safe electrical conductivity distance from the top cover of the single battery cell.

[0021] The bottom end of the terminal extension maintains a safe electrical conductivity distance from the top cover of the individual battery, effectively preventing electrical short circuits caused by accidental contact.

[0022] Furthermore, a conductive coating is provided between the inner wall of the mounting hole and the outer wall of the electrical connection post. The conductive coating has good conductivity and can fill the tiny gaps and unevenness between the terminal extension and the mounting hole, allowing current to pass through the contact interface more smoothly, reducing resistance loss, improving the charging and discharging efficiency of the battery, and enhancing the energy utilization rate of the battery system.

[0023] The fourth aspect of this utility model provides a battery component, including a battery module, wherein the battery module includes a plurality of the above-mentioned single battery components arranged along a first direction; the terminal extension members on each single battery component are used to connect with electrical connectors to realize electrical connection between the individual single battery components.

[0024] This invention fixes a terminal extension piece to each individual battery terminal in the battery module, extending the individual battery terminal to form a new connection component with a significantly increased height. Connecting the electrical connector to the connection component enables more convenient electrical connection between multiple individual battery modules. At the same time, it can also achieve a firm and efficient connection with other components, greatly improving the stability and reliability of the entire battery module.

[0025] Furthermore, the aforementioned battery component also includes a heat transfer component, which is fixed to each electrode extension member via a heat transfer component mounting structure to achieve heat exchange of the electrode extension member.

[0026] Based on heat transfer components, the thermal management efficiency of battery components can be significantly improved, the heat generated by the battery can be conducted away in a timely manner, the overheating of the battery can be effectively avoided, thereby greatly slowing down the aging rate of the battery, extending the battery life, and greatly reducing the risk of thermal runaway.

[0027] Furthermore, the aforementioned battery component also includes a housing, in which multiple individual battery modules are arranged along a first direction;

[0028] The top plate of the casing has a first clearance hole corresponding to the terminal extension of each individual battery module. The terminal extension extends out of the corresponding first clearance hole, and the clearance hole is sealed to the top plate area of ​​the casing and the top cover of the individual battery module.

[0029] Furthermore, the electrolyte and / or gas are shared among the individual battery cells. The electrolyte and / or gas within each individual battery cell are interconnected, placing all individual cells in the same system. This reduces differences between individual cells, improves consistency among them, and consequently enhances the cycle life of the battery assembly.

[0030] The beneficial effects of this utility model are:

[0031] This invention addresses the problems of poor adaptability and unstable connection of traditional low-height poles by proposing an expandable pole structure. By providing mounting holes in the pole body and using a pole extension with a compatible structure, height adjustment can be achieved.

[0032] During assembly, the pole extension structure can be quickly positioned by inserting it into the mounting hole, without the need for complex process tools, reducing assembly difficulty, increasing efficiency, and facilitating large-scale production.

[0033] For fixing methods, interference fit, welding, or threaded connection can be selected according to the needs of the scenario. This ensures that the pole and pole extension are firmly integrated into one unit. As a connection component with significantly increased height, it effectively solves the technical problems of poor adaptability and unstable connection that exist in the connection process of traditional low-height poles. Attached Figure Description

[0034] Figure 1 These are schematic diagrams of the structure of a single cell in Examples 1 to 5;

[0035] Figure 2 These are cross-sectional views of individual cells in Examples 1 to 5;

[0036] Figure 3This is a schematic diagram of the pole extension component in Example 1;

[0037] Figure 4 This is a cross-sectional view of the pole extension in Example 1;

[0038] Figure 5 This is a schematic diagram of the structure of a single battery module in Example 1;

[0039] Figure 6 This is a schematic diagram of the exploded structure of a single battery module in Example 1;

[0040] Figure 7 This is a cross-sectional view of a single battery module in Example 1;

[0041] Figure 8 This is a schematic diagram of the battery component in Example 1;

[0042] Figure 9 This is a cross-sectional view of the battery component in Example 1;

[0043] Figure 10 This is a schematic diagram of the battery component in Example 2;

[0044] Figure 11 This is a schematic diagram of the exploded structure of the battery component in Example 2;

[0045] Figure 12 This is a cross-sectional view of the battery component in Example 2;

[0046] Figure 13 This is a schematic diagram of the pole extension component in Example 3;

[0047] Figure 14 This is a cross-sectional view of the pole extension in Example 3;

[0048] Figure 15 This is a schematic diagram of the structure of a single battery module in Example 3;

[0049] Figure 16 This is a schematic diagram of the exploded structure of a single battery module in Example 3;

[0050] Figure 17 This is a cross-sectional view of a single battery module in Example 3;

[0051] Figure 18 This is a schematic diagram of the battery component in Example 3;

[0052] Figure 19 This is a cross-sectional view of the battery component in Example 3;

[0053] Figure 20 This is a schematic diagram of the structure of the second heat transfer tube in Example 3;

[0054] Figure 21 This is a schematic diagram of the battery component in Example 4;

[0055] Figure 22 This is a schematic diagram of the exploded structure of the battery component in Example 4;

[0056] Figure 23 This is a cross-sectional view of the battery component in Example 4.

[0057] The attached figures are labeled as follows:

[0058] 1. Terminal post; 11. Terminal post body; 12. Mounting hole; 2. Terminal post extension; 21. Terminal post extension body; 22. Electrical connection post; 23. First through groove; 24. Second through groove; 25. First part of terminal post extension body; 26. Welding part; 27. Through hole; 3. Single cell; 4. Battery module; 5. First heat transfer pipe; 51. First stepped structure; 6. Outer shell; 60. First clearance hole; 61. Electrolyte sharing chamber; 62. Gas sharing chamber; 63. Sealing ring; 7. Second heat transfer pipe; 71. Second clearance hole; 72. Second stepped structure. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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," "third," "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] This utility model discloses an electrode post and an electrode post extension adapted thereto.

[0063] An installation hole is made on the pole post to allow a portion of the pole post extension component to be inserted. After insertion, the top of the pole post extension component is higher than the top of the pole post body. Specifically, an electrical connection post protruding from the pole post extension component body can be provided at the bottom of the pole post extension component body; the electrical connection post is inserted into the installation hole on the pole post body and connected to the pole post body.

[0064] Reliable fixing methods such as interference fit, welding, and threaded connection can be selected according to actual needs to firmly combine the pole and pole extension into one unit, forming a new connection component with significantly increased height, effectively solving many problems faced by traditional low-height poles during connection.

[0065] This utility model also discloses a single battery assembly, including a single battery cell, the terminal of the single battery cell being the aforementioned terminal cell, and the aforementioned terminal cell extension member being fixed on the terminal cell. Specifically, the electrical connection post on the terminal cell extension member is inserted into the mounting hole on the terminal cell body and connected to the terminal cell body; and the top end of the terminal cell extension member is higher than the top end of the terminal cell body, and a safe electrical conduction distance is maintained between the bottom end of the terminal cell extension member and the top cover plate of the single battery cell.

[0066] This utility model also discloses a battery component assembled from the above-mentioned single battery modules. Such a battery component includes a battery module, which is mainly composed of multiple single battery modules arranged along the first direction. By connecting the electrical connectors to the terminal extensions, it is possible to more conveniently realize the electrical connection between multiple single battery modules. At the same time, it can also realize a firm and efficient connection with other components, which greatly improves the stability and reliability of the entire battery component.

[0067] It should be noted that:

[0068] The aforementioned battery modules can include at least the following three types:

[0069] Type 1 battery module:

[0070] The first type of battery module includes multiple individual battery components arranged along a first direction;

[0071] For ease of description, in this utility model, the arrangement direction of the individual battery modules is defined as the x-direction; the height direction of the individual battery modules is defined as the z-direction; and the direction perpendicular to both the x and z directions is defined as the y-direction.

[0072] Second type of battery module:

[0073] 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 battery modules are connected to achieve electrolyte sharing, reduce the differences between individual battery modules, 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 battery modules to achieve gas balance and further optimize the cycle performance of the battery module.

[0074] Third type of battery module:

[0075] The third type of battery module, based on the first type of battery module, adds a shell, with multiple individual battery components arranged along the x-direction and placed inside the shell cavity.

[0076] This utility model does not specifically limit the above-mentioned shell structure, but at least the following two structures can be adopted:

[0077] The first structure includes a cylindrical body with open ends (i.e., the port parallel to the yz plane is the open end) and end plates fixed to the two open ends of the cylindrical body (i.e., the end plates are parallel to the yz plane).

[0078] The second structure includes a cylindrical body 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 fixed to the open ends at the top and bottom of the cylindrical body respectively (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 cylindrical body).

[0079] A shared chamber can be provided inside the aforementioned casing to enable communication between the internal cavities of each individual battery module.

[0080] It should be noted that:

[0081] The aforementioned shared chamber can be an electrolyte shared chamber, whose inner cavity is connected to the inner cavity of each individual battery module. This shared chamber ensures that each individual battery module is in a uniform electrolyte environment, guaranteeing the homogeneity of the electrolyte within each module 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 bottom plate of the outer casing and each individual battery module. This liquid channel can be integrally formed with the bottom plate of the outer casing, or it can be formed by setting a support between the lower cover plate of the individual battery module and the bottom plate of the outer casing. It should be noted that in the first type of casing structure, the bottom plate here is a cylindrical bottom plate; in the second type of casing structure, the bottom plate here is a base plate.

[0082] The aforementioned shared chamber can also be a gas-sharing chamber located on the top plate of the outer casing, covering the gas ports on the top of each individual battery module in the battery module.

[0083] It should be noted that in the first type of shell structure, the top plate of the shell here is the top plate of the cylinder; in the second type of shell structure, the top plate of the shell here is the top plate.

[0084] It should also be noted that the gas port here has the following two meanings:

[0085] 1) The gas port is a through hole that is directly opened on the top cover of the single cell module and penetrates the inner cavity of the single cell module;

[0086] At this time, the gas-sharing chamber is connected to the gas area of ​​each individual battery module through the gas port. Based on the gas-sharing chamber, the gas areas of each individual battery module can be connected to achieve gas balance, so that the gas of each individual battery module is shared to ensure the consistency of each individual battery module and improve the cycle life of the battery module to a certain extent. When any individual battery module experiences thermal runaway, the flue gas in the inner cavity of that individual battery module enters the gas-sharing chamber and is discharged through the gas-sharing chamber, thereby improving the safety of the battery module.

[0087] 2) The gas port is a vent or explosion-proof port installed on the cover plate of the single battery module, and a venting membrane is provided at the vent or explosion-proof port.

[0088] 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 module is ruptured by the flue gas in the inner cavity, the inner cavity of that single battery module 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.

[0089] The aforementioned shared chamber can also be a gas-liquid shared chamber. Through a gas-liquid shared chamber, each individual battery module 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.

[0090] A first clearance hole is made on the top plate of the outer casing corresponding to the terminal extension of each individual battery module; each terminal extension extends out of the corresponding first clearance hole, and the area of ​​the top plate of the outer casing corresponding to the first clearance hole is fixedly sealed with the outer casing of the individual battery module, so that the first clearance hole part of the top plate of the outer casing is sealed.

[0091] It should be noted that:

[0092] The area on the top plate of the outer casing corresponding to the first clearance hole can be the area around the first clearance hole on the top plate of the outer casing, or it can be the wall of the first clearance hole.

[0093] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0094] Example 1

[0095] like Figure 1 and Figure 2 The figures shown are a schematic diagram and a cross-sectional view of the single cell 3 in this embodiment. The terminal 1 in the single cell 3 includes a terminal body 11, which is usually designed as a cylinder and its size can be customized according to the actual application scenario.

[0096] In some other embodiments, the pole body 11 may also be a rectangular block structure.

[0097] Metal materials with good electrical and thermal conductivity can be used, such as silver, copper, and aluminum. However, considering both cost and electrical and thermal conductivity, aluminum is generally chosen as the material for electrode 1.

[0098] from Figure 1 and Figure 2 As can be seen from the figure, in this embodiment, mounting holes 12 are provided on the pole body 11 for inserting part of the pole extension 2, thereby achieving an effective connection between the two.

[0099] The mounting hole 12 extends along the height direction of the pole body 11 and is a blind hole structure.

[0100] like Figure 3 and Figure 4 The figures shown are a schematic diagram and a cross-sectional view of the pole extension member 2 in this embodiment. The pole extension member 2 includes a pole extension member body 21. The pole extension member body 21 is usually designed as a rectangular block structure. Its length, width and height can be customized according to the actual application scenario to adapt to different battery specifications.

[0101] In some other embodiments, the pole extension body 21 may also be a cylinder.

[0102] Metal materials with good electrical and thermal conductivity can be used, such as silver, copper, and aluminum. However, considering both cost and electrical and thermal conductivity, aluminum, the same material as pole 1, is generally chosen as the material for pole extension 2.

[0103] An electrical connection post 22 is provided on the pole extension body 21, such as Figure 3 and Figure 4 As shown, the electrical connection post 22 is located at the bottom of the pole extension body 21 and protrudes from the pole extension body 21; in this embodiment, the pole extension body 21 and the electrical connection post 22 are an integral structure.

[0104] In this embodiment, the electrical connection post 22 has an overall columnar structure, and its cross-sectional shape is mainly adapted to the shape of the mounting hole 12, which facilitates its insertion into the mounting hole 12 and connection with the pole post 1.

[0105] like Figures 5 to 7The figures shown are a schematic diagram, an exploded view, and a cross-sectional view of the single-cell battery assembly in this embodiment. It can be seen that the single-cell battery assembly in this embodiment includes a single-cell battery 3 and the aforementioned terminal extension member 2. In this embodiment, the single-cell battery 3 is a square-shell battery, and its terminal 1 is the aforementioned terminal 1 with mounting holes 12. A terminal extension member 2 is installed on each terminal 1.

[0106] In some other embodiments, the single cell 3 may also be a cylindrical cell with a terminal extension 2 mounted on its terminal 1.

[0107] During installation, insert the electrical connection post 22 of the pole extension 2 into the mounting hole 12 of the pole 1 and fix it to the pole extension 2. It is worth noting that after installation, a safe electrical conduction distance must be maintained between the bottom end of the pole extension 2 and the top cover of the single cell 3.

[0108] There are three main types of connection methods to choose from:

[0109] Interference fit connection: The diameter of the mounting hole 12 is adapted to the outer diameter of the electrical connection post 22 of the pole extension 2. When the electrical connection post 22 is inserted into the mounting hole 12, the two are tightly connected by interference fit. This connection method requires a certain external force to press the pole 1 into the mounting hole 12 during assembly, which can generate a large frictional force between the pole extension 2 and the mounting hole 12. No additional auxiliary fixing measures are needed to ensure a stable connection and effectively prevent the pole extension 2 from loosening or shifting during use.

[0110] Threaded connection: The diameter of the mounting hole 12 is slightly larger than the outer diameter of the electrical connection post 22 of the terminal extension 2. A threaded structure is provided on the wall of the mounting hole 12. Correspondingly, a matching threaded structure needs to be provided on the electrical connection post 22 of the terminal extension 2. After the electrical connection post 22 is inserted into the mounting hole 12, the terminal extension 2 is rotated to achieve a tight connection with the mounting hole 12. The threaded connection is easy to operate and has good disassembly, making it easy to separate the terminal post 1 from the terminal extension post 2 during subsequent maintenance or replacement of battery module 4 components. At the same time, by controlling the screw-in depth of the thread, the position of the terminal extension post 2 in the mounting hole 12 can be flexibly adjusted.

[0111] Welding connection: The diameter of the mounting hole 12 is slightly larger than the outer diameter of the electrical connection post 22 of the pole extension 2, so as to facilitate the insertion of the electrical connection post 22 into the mounting hole 12; during assembly, the electrical connection post 22 is inserted into the mounting hole 12, and the outer wall of the electrical connection post 22 is welded to the area around the opening of the mounting hole 12 of the pole 1. Figure 7 (position shown in a).

[0112] Compared to threaded connections and interference fit connections, welded connections form a permanent bond through interatomic bonding, resulting in higher connection strength. This provides better resistance to complex operating conditions, ensuring a stable connection and effectively preventing electrical instability caused by loosening. This embodiment preferably uses a welded connection method.

[0113] Furthermore, in this embodiment, a conductive coating can be provided between the outer wall of the electrical connection post 22 of the pole extension 2 and the mounting hole 12 of the pole 1. Metal coating materials (silver coating, copper coating, etc.), carbon-based coating materials (graphene coating, carbon nanotube coating, etc.), or conductive polymer coatings (polypyrrole coating, etc.) can be used.

[0114] The conductive coating possesses excellent conductivity, effectively filling minute gaps and unevenness between the electrical connection post 22 and the mounting hole 12. This allows current to flow more smoothly through the contact interface, reducing resistance loss, improving battery charging and discharging efficiency, and enhancing the energy utilization of the battery system. Furthermore, the conductive coating effectively improves the electrical contact stability between the electrical connection post 22 and the terminal post 1. During battery operation, complex conditions such as vibration and temperature changes can alter the contact state between the electrical connection post 22 and the terminal post 1, thus affecting electrical connection stability. The conductive coating adheres tightly to the outer wall of the electrical connection post 22 and the inner wall of the mounting hole 12, maintaining good conductivity even under external forces. This ensures a consistently stable and reliable electrical connection, preventing current fluctuations and power outages caused by poor contact, thus providing strong support for the stable operation of the battery system. Additionally, during the installation of the terminal post extension 2, relative friction may occur between the electrical connection post 22 and the terminal post 1, leading to surface wear. The conductive coating has a certain degree of wear resistance, which can reduce this friction and wear to a certain extent, protect the surface integrity of the electrical connection post 22 and the electrode post 1, maintain good electrical connection and mechanical properties, and reduce the risk of failure caused by wear.

[0115] The battery components in this embodiment include the first type of battery module described above.

[0116] Battery module 4 includes 12 of the aforementioned individual battery cells arranged along the x-direction. In other embodiments, the number of individual battery cells can be adjusted according to actual needs.

[0117] Connecting the electrical connector to the terminal extension 2 makes it easier to achieve electrical connection between multiple individual battery modules, and also enables a robust and efficient connection with other components, greatly improving the stability and reliability of the entire battery module.

[0118] Preferably, in this embodiment, a heat transfer component mounting structure can also be provided on the electrode extension body 21 for mounting the heat transfer component and realizing battery heat exchange based on the heat transfer component.

[0119] For the specific structure of pole extension 2, please refer to Figure 3 and Figure 4 As can be seen, in this embodiment, a first through groove 23 is formed on the electrode extension body 21 as a heat transfer component mounting structure. The first through groove 23 extends through the electrode extension body 21 in a direction perpendicular to the axis of the electrical connection post 22, and its inner cavity is used to install a tubular heat transfer component, which is defined here as the first heat transfer tube 5.

[0120] The inner cavity shape of the first through groove 23 is adapted to the cross-sectional shape of the first heat transfer tube 5, ensuring that the first heat transfer tube 5 is tightly clamped within it. This ensures installation stability while also guaranteeing the heat transfer effect between the first heat transfer tube 5 and the pole extension 2. As can be seen from the figure, this embodiment uses a rectangular first through groove 23, and the first heat transfer tube 5 adapted to it should be a square tube.

[0121] In some other embodiments, additional snap-fit ​​structures can be fixed on the pole extension body 21 as heat transfer component mounting structures. However, compared to this embodiment, when installing the first heat transfer pipe 5, it is necessary to accurately align the snap-fit ​​structure position, and tools are often required to snap the first heat transfer pipe 5 in. Slight carelessness during the process may lead to deformation of the snap-fit ​​structure or improper installation of the first heat transfer pipe 5. In this embodiment, the first heat transfer pipe 5 only needs to be placed directly along the first through groove 23 to complete the initial positioning, significantly reducing the operational difficulty, greatly shortening the installation time, and significantly improving production efficiency. From the perspective of thermal contact effect, due to the limitations of the snap-fit ​​structure's snap-fit ​​shape and installation method, gaps are likely to exist between the first heat transfer pipe 5 and the pole extension 2, making it impossible to guarantee tight thermal contact. In contrast, the first through groove 23 achieves large-area surface contact between the first heat transfer pipe 5 and the pole extension 2. For example, some clip-on mounting structures only fix the first heat transfer pipe 5 through a few contact points, limiting heat transfer to these small areas and resulting in high thermal resistance. The large-area contact of the first through groove 23 allows heat to be quickly and evenly conducted from the electrode extension 2 to the first heat transfer tube 5, greatly improving the heat transfer rate and making the heat dissipation effect far superior to point and line contact structures, thus more effectively maintaining the appropriate operating temperature of the battery.

[0122] After the heat transfer component mounting structure is set up, the electrode extension 2 plays a dual role. On the one hand, it increases the height of the electrode 1, making it easier and more efficient to connect the polarity terminals to other components when constructing the battery component, greatly improving the stability and reliability of the entire battery component. On the other hand, the first heat transfer pipe 5 can be fixed in the first through groove 23 of the electrode extension 2. Based on this, during the operation of the battery component, efficient heat exchange can be achieved with the help of the first heat transfer pipe 5, effectively ensuring that the battery component operates stably at a suitable temperature.

[0123] It should be noted that:

[0124] The electrode extension shown in the figure has a body 21 larger than the electrical connection post 22 in both the x and y directions. This allows for the fabrication of a larger through-groove heat transfer component mounting structure on the electrode extension body 21, resulting in better heat exchange. However, this design also has drawbacks. When the electrical connection post 22 is inserted into the electrode mounting hole, the larger electrode extension body 21 may obstruct the welding position, affecting the welding quality and consequently the connection strength between the electrode extension and the electrode.

[0125] To address this issue, the design can be flexibly adjusted in practical applications. If ease of welding is prioritized, the pole extension body 21 can be designed as a cylinder with the same shape as the electrical connection post 22, and its outer diameter is less than or equal to that of the electrical connection post 22. In this way, when the electrical connection post 22 is inserted into the pole mounting hole, the pole extension body 21 will not obstruct the welding process, ensuring smooth welding and guaranteeing connection strength. If heat exchange efficiency is more important, auxiliary welding processes can be used during installation, such as welding equipment with special angles or customized welding fixtures, to avoid the body obstructing the welding position. This ensures connection strength while fully leveraging the heat exchange advantages of the large-size body.

[0126] The structure of the battery component in this embodiment is as follows: Figure 8 and Figure 9 As shown, it includes a battery module 4 and a first heat transfer pipe 5;

[0127] In this embodiment, battery module 4 is the first type of battery module mentioned above.

[0128] As shown in the figure, the battery module 4 in this embodiment includes 12 individual battery modules arranged along the x-direction. In other embodiments, the number of individual battery modules can be adjusted according to actual needs.

[0129] There are two first heat transfer tubes 5, both extending along the x-direction. The two first heat transfer tubes 5 are arranged along the y-direction and are respectively fixed in the first through groove 23 of each pole post extension 2 located on the same side.

[0130] Preferably, a thermally conductive adhesive layer can also be provided between the first channel 23 and the first heat transfer tube 5. The thermally conductive adhesive layer can be made of silicone thermally conductive adhesive, which is made of silicone polymer as the matrix and combined with a high thermal conductivity filler material; it can also be made of acrylic thermally conductive adhesive, which can form a stable thermally conductive adhesive layer in a short time.

[0131] The thermally conductive adhesive layer disposed between the first channel 23 and the first heat transfer tube 5 can tightly adhere to the outer wall of the first heat transfer tube 5 and the inner wall of the first channel 23, thus fixing the first heat transfer tube 5. It has high adhesion; when applied between the outer wall of the first heat transfer tube 5 and the inner wall of the first channel 23, it forms a strong adhesive force on the contact surface, effectively preventing the first heat transfer tube 5 from shaking within the first channel 23. This greatly improves the stability of the installation of the first heat transfer tube 5, avoiding loosening of the connection due to shaking, which would affect the heat dissipation and conductivity of the battery components. Simultaneously, the adhesive layer significantly optimizes thermal conductivity. Unlike traditional direct solid contact methods, the adhesive layer can better adapt to different surface shapes and roughnesses. At the microscopic scale, even if there are minor unevennesses between the outer wall of the first heat transfer tube 5 and the inner wall of the first channel 23, the adhesive layer can fill these gaps through its own fluidity, forming an efficient heat conduction path. This effectively avoids hotspot issues caused by local thermal resistance differences, further improves the heat dissipation efficiency of the battery components, and ensures that the battery components operate in a stable temperature environment.

[0132] Furthermore, in this embodiment, the first heat transfer tube 5 can be an electrical conductor, and the material can be a high-purity aluminum alloy, such as 6063 aluminum alloy. This material has good electrical conductivity, with a conductivity of 30-35 MS / m at 20°C, which can meet the requirements for current conduction; at the same time, it has excellent thermal conductivity, with a thermal conductivity of approximately 200-230 W / (m·K), which can efficiently achieve heat dissipation.

[0133] In this embodiment, the electrode extension members 2 on the same side of the battery component have the same polarity, while the electrode extension members 2 on different sides have opposite polarities. The two first heat transfer pipes 5 are respectively fixed on the electrode extension members 2 on both sides, so as to realize the parallel connection of multiple single cells 3.

[0134] Therefore, in this embodiment, the first heat transfer pipe 5 not only serves as a heat dissipation component but also as an electrical conductor to realize the parallel connection of multiple individual battery cells 3, which has at least the following advantages:

[0135] Firstly, the elimination of the need for dedicated conductive connectors simplifies the overall structure of the battery component. In traditional battery modules, heat dissipation and conductivity are often handled by different components, requiring complex structural layouts and connection designs. In this embodiment, the first heat transfer pipe 5 integrates heat dissipation and conductivity functions, reducing the need for dedicated conductive connectors and making the overall structure of the battery component simpler and more compact, thus reducing design complexity and the probability of errors.

[0136] Secondly, since the first heat transfer pipe 5 simultaneously performs both heat dissipation and electrical conductivity functions, the number of components in the battery assembly is reduced, thus lowering the assembly difficulty and cost. Previously, separate heat dissipation pipes and conductive connectors 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.

[0137] Thirdly, the first heat transfer tube 5, as a parallel connector, is directly embedded in the first through groove 23 of the electrode extension 2, making full use of the space of the electrode extension 2 and avoiding the problem of additional conductive connectors occupying space, which is conducive to improving the integration of battery components.

[0138] Fourthly, the first heat transfer pipe 5, as a parallel connector, ensures a more uniform current distribution among multiple individual battery cells 3, preventing individual cells from overheating and being damaged due to excessive current. The first heat transfer pipe 5 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 battery cells 3 are connected in parallel through the first heat transfer pipe 5, the current can flow evenly to each individual battery cell 3, avoiding excessive current in individual cells due to uneven current distribution, which could lead to overheating and damage. This effectively improves the overall performance and stability of the battery module 4.

[0139] In order to improve the connection stability between the first heat transfer tube 5 and the pole extension 2, and to ensure efficient heat conduction and uniform current transmission, the structure of the first heat transfer tube 5 is optimized in this embodiment. A first step structure 51 is provided on the outer wall of the first heat transfer tube 5 along its length direction. The horizontal surface of the first step structure 51 is flush with the top of the side wall of the first through groove 23. The joint between the horizontal surface of the first step structure 51 and the top of the side wall of the first through groove 23 is welded together.

[0140] It should be noted that the horizontal plane of the first step structure 51 mentioned above refers to the connection surface between the large-diameter section and the small-diameter section of the first heat transfer tube 5 in the z direction.

[0141] A first step structure 51 is provided on the outer wall of the first heat transfer tube 5, and the horizontal plane of the first step structure 51 is flush with the top of the side wall of the first through groove 23. At the same time, the joint is welded together, which has at least the following advantages:

[0142] Improved stability: The first-step structure 51 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.

[0143] Optimize thermal conductivity and electrical conductivity: The horizontal plane of the first step structure 51 is flush with the top of the side wall of the first through groove 23, ensuring a tighter contact between the first heat transfer tube 5 and the pole extension 2, 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, so that the current can be evenly distributed between the first heat transfer tube 5 and the pole extension 2, avoiding local current concentration or hot spots caused by poor contact.

[0144] Furthermore, during the welding process, conventional welding operations may damage the structure of the first heat transfer tube 5 due to factors such as high temperature and stress concentration, thus leading to potential leakage. The design of the first step structure 51, with its horizontal plane flush with the top of the sidewall of the first through groove 23, provides an ideal operating plane for laser welding along the z-direction, effectively preventing leakage problems caused by damage to the structure of the first heat transfer tube 5 during the welding process. When the heat transfer medium (such as coolant) flows within the first heat transfer tube 5, this design effectively prevents leakage of the heat transfer medium from the joint.

[0145] In some other embodiments, an electrolyte sharing pipeline can be provided at the bottom of the battery component. The inner cavity of the electrolyte sharing pipeline is connected to the electrolyte area of ​​each individual battery module, so as to realize electrolyte sharing, reduce the difference between individual battery modules, and optimize the cycle performance of the battery component.

[0146] Example 2

[0147] This embodiment presents another type of battery component. Its structure differs from the battery components in the above embodiments in that the battery module 4 in this embodiment is the third type of battery module described above, with the specific structure as follows: Figures 10 to 12 As shown.

[0148] In this embodiment, the third type of battery module arranges 12 individual battery components in the inner cavity of the outer shell 6, and each electrode extension 2 is located outside the outer shell 6. The first heat transfer pipe 5 is fixed on the electrode extension 2 located on the same side.

[0149] A support extending in the x-direction is provided between the bottom plate of the outer casing 6 and each individual battery assembly to form a liquid channel, serving as an electrolyte sharing chamber 61.

[0150] The top plate of the outer casing 6 may also be provided with a boss extending in the x direction, and a gas channel is opened on the boss, which serves as a gas sharing chamber 62.

[0151] This embodiment can achieve the assembly of battery components through the following process:

[0152] First, place 12 individual battery modules inside the housing 6, so that the terminals 1 of each individual battery 3 correspond one-to-one with the first clearance holes 60.

[0153] Then, the top plate of the outer shell 6 corresponding to the first clearance hole 60 is fixed and sealed to the outer shell 6 of the single battery 3, and an extension piece 2 is fixed on each pole post 1.

[0154] In this embodiment, a sealed connection is achieved by welding the edge of the first clearance hole 60 near the single cell 3 to the upper cover plate of the single cell 3, thus preventing external environmental interference with the internal environment of the battery through the gap between the first clearance hole 60 and the terminal post 1. Besides the welding method used in this embodiment, in some other embodiments, laser welding can also be used to weld the area around each first clearance hole 60 on the top plate of the outer casing 6 to the area around the corresponding terminal post 1 on the upper cover plate of the single cell 3.

[0155] The specific operation of fixing the pole extension 2 on the pole 1 is to insert the electrical connection post 22 of the pole extension 2 into the mounting hole 12 of the pole 1, and weld the outer wall of the electrical connection post 22 to the edge area of ​​the mounting hole 12 of the pole 1.

[0156] Finally, the first heat transfer tube 5 is fixed along the x-direction in the first through groove 23 of each pole extension 2 located on the same side.

[0157] Example 3

[0158] Unlike the pole extension member 2 in Embodiment 1, this embodiment has two second through slots 24 on the pole extension member body 21 as a heat transfer component mounting structure.

[0159] The heat transfer component that works with it is also a tubular heat transfer component (second heat transfer tube 7). The second heat transfer tube 7 has an opening on its tube wall for the pole extension 2 to avoid, and the two side walls are used to be embedded in the two second through slots 24 of the pole extension 2 respectively.

[0160] The specific structure of pole extension 2 is as follows: Figure 13 and Figure 14 As shown, in this embodiment, two parallel second through slots 24 are formed on the pole extension body 21. The second through slots 24 penetrate the pole extension body 21 in the x-direction, and the two second through slots 24 are arranged at intervals in the y-direction. For ease of description, the portion located between the two second through slots 24 is defined as the first portion 25 of the pole extension body.

[0161] The shape of the cross-section of the second channel 24 mainly conforms to the shape of the wall of the second heat transfer pipe 7 that is embedded in the second channel 24. It should be noted that the cross-section mentioned here is the cross-section obtained by cutting the second channel 24 along a plane perpendicular to the first direction. For example, as can be seen from the figure, the cross-section of the second channel 24 in this embodiment is rectangular, and correspondingly, the cross-section of the second heat transfer pipe 7 embedded in the wall of the second channel 24 is also rectangular, for example, it can be a rectangular pipe. In some other embodiments, the cross-section of the second channel 24 can be arc-shaped, and correspondingly, the cross-section of the second heat transfer pipe 7 embedded in the wall of the second channel 24 is also arc-shaped, for example, a pipe with a semi-circular cross-section can be used.

[0162] The width dimension (in the y direction) of the second through groove 24 mentioned above needs to ensure that the wall of the corresponding second heat transfer tube 7 can be embedded, and there is a certain gap between the inner wall of the second heat transfer tube 7 and the first part 25 of the pole extension body to allow the heat transfer medium to flow.

[0163] To improve the connection stability between the second heat transfer tube 7 and the pole extension member 2, this embodiment provides a welding part 26 on the side wall of the second through groove 24, which is then welded and fixed to the second heat transfer tube 7. Here, the side wall of the second through groove 24 is the side wall of the second through groove 24 away from the first part 25 of the pole extension member body.

[0164] Specifically, there are two feasible welding methods. First, a large area of ​​the sidewall of the second channel 24 can be used as the welding part 26, and it can be welded through to the second heat transfer pipe 7 to form a strong connection, effectively enhancing the bonding strength and heat conduction performance of both. Second, the top of the sidewall of the second channel 24 (a continuous plane extending along the first direction) can be used as the welding part 26. Welding can be performed along the contact area between the top of the sidewall of the second channel 24 and the wall of the second heat transfer pipe 7, ensuring a uniform and continuous weld, thereby achieving a tight connection between the two.

[0165] Welding allows for a tight connection between the second heat transfer pipe 7 and the electrode extension 2. Compared to other connection methods, such as simple mechanical fixing, welding eliminates tiny gaps at the connection point, significantly reducing thermal resistance and greatly improving the heat transfer efficiency between the two, ensuring effective heat transfer. Simultaneously, welding enhances the connection stability, preventing the second heat transfer pipe 7 from separating from the electrode extension 2 due to vibration, impact, or other factors during battery operation. This avoids affecting heat dissipation and ensures the continuous and stable operation of the battery component.

[0166] like Figures 15 to 17The figures shown are a schematic diagram, an exploded view, and a cross-sectional view of the single-cell battery assembly in this embodiment. It can be seen that the single-cell battery assembly in this embodiment includes a single-cell battery 3 and the aforementioned terminal extension member 2. In this embodiment, the single-cell battery 3 is a prismatic battery, and a terminal extension member 2 is installed on each terminal post 1. The terminal post 1 of the single-cell battery 3 and its connection method with the terminal extension member 2 are the same as in Embodiment 1, and will not be repeated here.

[0167] like Figure 18 and Figure 19 In this embodiment, the battery component includes a battery module 4 and two second heat transfer pipes 7. The battery module 4 in this embodiment is the first type of battery module described above.

[0168] As shown in the figure, the battery module 4 in this embodiment includes 12 individual battery modules arranged along the x-direction. In other embodiments, the number of individual battery modules can be adjusted according to actual needs. The positive terminal extensions 2 (which are fixed to the positive terminal 1) of the 12 individual battery modules are arranged on one side, forming the total positive terminal of the battery module 4; the negative terminal extensions 2 (which are fixed to the negative terminal 1) of the 12 individual batteries are arranged on the other side, forming the total negative terminal of the battery module 4. In some other embodiments, the arrangement of the terminal extensions 2 of the individual batteries 3 can be adjusted according to the overall capacity requirements of the battery module 4 to adjust the series and parallel connection of each individual battery 3.

[0169] Each second heat transfer pipe 7 extends along a first direction, and two second heat transfer pipes 7 are arranged along a second direction, respectively embedded in the second through slots 24 of each pole extension member 2 located on different sides. In this embodiment, one second heat transfer pipe 7 is embedded in the second through slot 24 of the total positive terminal of the battery module 4, and the other second heat transfer pipe 7 is embedded in the second through slot 24 of the total negative terminal of the battery module 4.

[0170] When the second heat transfer tube 7 is embedded in the second through groove 24, the first part 25 of the pole extension body of each pole extension 2 extends into the inner cavity of the second heat transfer tube 7 through the pole extension 2 clearance opening formed on the tube wall of the second heat transfer tube 7. At the same time, a certain gap is reserved between the first part 25 of the pole extension body and the inner wall of the second heat transfer tube 7 as a sub-cavity for the flow of heat transfer medium; in order to prevent the heat transfer medium in the sub-cavity from overflowing, it is necessary to seal the pole extension 2 and the pole extension 2 clearance opening.

[0171] Sealing measures can be taken by using sealants that are resistant to high temperatures and corrosion and have good insulation properties, or by installing sealing rings 63, sealing gaskets, etc., to ensure that the heat transfer medium flows stably in the closed sub-cavity.

[0172] Specifically, appropriate sealing measures can be selected based on the structure of the clearance opening, so as to... Figure 20 As shown in the figure, taking the structure of the second heat transfer tube 7 in this embodiment as an example, its clearance is 12 second clearance holes 71 opened in the tube wall of the second heat transfer tube 7; the 12 second clearance holes 71 are arranged at intervals along the x direction, and the 12 second clearance holes 71 correspond one-to-one with each pole post extension 2 on the same side of the battery module 4.

[0173] Corresponding to the above-mentioned clearance structure, such as Figure 18 and Figure 19 In this embodiment, a sealing measure is adopted by installing a sealing ring 63.

[0174] The specific installation steps are as follows: (Combined with...) Figure 18 and Figure 19 First, a sealing ring 63 is fitted onto the first part 25 of the electrode extension body of each electrode extension 2. Preferably, in the x-direction, the electrode extension 2 extends out from both sides of the sealing ring 63, and in the z-direction, the bottom of the sealing ring 63 is in close contact with the bottom of the second through groove 24, and the bottom of the extended electrode extension 2 is in close contact with the top cover plate of the single battery 3. This arrangement can stabilize the position of the sealing ring 63 and prevent the sealing ring 63 from shifting during installation, thus affecting the sealing effect. Next, pick up two second heat transfer tubes 7, one corresponding to the positive terminal side of the battery module 4 and the other corresponding to the negative terminal side. Align the second heat transfer tubes 7 with the corresponding side of the second through groove 24 and insert them into the second through groove 24. In this process, it is necessary to ensure that the first part 25 of the electrode extension body with the sealing ring 63 fitted on each electrode extension 2 extends into the second clearance hole 71 on the second heat transfer tube 7 one by one. During the embedding process, the movement should be smooth to prevent the second heat transfer tube 7 from colliding with the pole extension 2 and damaging or displacing the sealing ring 63. After the second heat transfer tube 7 is initially embedded in the second through groove 24, welding is performed on the sidewall of the second through groove 24. As welding progresses, the second heat transfer tube 7 gradually fuses with the sidewall of the second through groove 24. During this process, the pressure generated by welding exerts a uniform and continuous squeezing effect on the sealing ring 63 fitted on the first part 25 of the pole extension body. After being squeezed, the sealing ring 63 undergoes elastic deformation, tightly filling the tiny gap between the pole extension 2 and the second clearance hole 71, thereby achieving an efficient and reliable seal and effectively preventing the heat transfer medium in the flow cavity from overflowing.

[0175] The aforementioned sealing ring 63 offers several advantages in the battery module 4. Under complex operating conditions, especially in vibrating environments, the sealing ring 63 can absorb some of the stress generated by vibration, preventing damage to the sealing structure due to relative displacement between the terminal extension 2 and the second clearance hole 71, thus ensuring stable sealing performance. From a structural stability perspective, when the battery module 4 vibrates or is subjected to external impacts, the sealing ring 63 acts as a buffer between the terminal extension 2 and the second heat transfer tube 7, dispersing and absorbing some stress, reducing the direct impact force of the terminal extension 2 on the second heat transfer tube 7, reducing the risk of material fatigue and damage to the second heat transfer tube 7 due to localized stress concentration, improving its overall structural stability, and extending its service life. In terms of manufacturing, using the sealing ring 63 for sealing is simpler and easier than some complex sealing processes, such as applying special sealant. During manufacturing, simply fitting the sealing ring 63 onto the terminal extension 2 and then welding the second heat transfer tube 7 achieves a good sealing effect, helping to improve production efficiency, reduce manufacturing costs, and minimize quality problems caused by complex processes.

[0176] In some other embodiments, the clearance opening may also be an elongated clearance hole formed on the wall of the second heat transfer tube 7. The elongated clearance hole extends along the first direction, and the first part 25 of the pole extension body of each pole extension 2 extends into the inner cavity of the second heat transfer tube 7 through the elongated clearance hole.

[0177] Corresponding to the above-mentioned clearance structure, a sealing gasket can be used as a sealing measure. This type of sealing gasket has 12 third clearance holes arranged at intervals along the first direction; the 12 third clearance holes correspond one-to-one with each terminal post extension 2 on the same side of the battery module 4.

[0178] During installation: First, place the two sealing gaskets into the second through-groove 24 of the different side electrode extension members 2, ensuring that the first part 25 of the electrode extension body on each electrode extension member 2 protrudes through the third clearance hole on the corresponding sealing gasket. During installation, ensure that the bottom of the sealing gasket is tightly fitted to the bottom of the second through-groove 24 and the top cover of the individual battery 3. Next, pick up the two second heat transfer tubes 7, one corresponding to the positive terminal side of the battery module 4 and the other to the negative terminal side. Align the second heat transfer tubes 7 with the corresponding side of the second through-groove 24 and insert them into the second through-groove 24, ensuring that the first part 25 of the electrode extension body on each electrode extension member 2 extends into the elongated clearance hole on the second heat transfer tube 7. After the second heat transfer tubes 7 are initially inserted into the second through-groove 24, weld the second heat transfer tubes 7 to the sidewall of the second through-groove 24. As welding progresses, the second heat transfer tube 7 gradually fuses with the sidewall of the second through groove 24. During this process, the pressure generated by welding exerts a uniform and continuous squeezing effect on the sealing gasket fitted on the first part 25 of the pole extension body. After being squeezed, the sealing gasket undergoes elastic deformation, tightly filling the tiny gap between the pole extension 2 and the second clearance hole 71, thus achieving an efficient and reliable seal and effectively preventing the heat transfer medium from overflowing from the flow cavity.

[0179] In this embodiment, for a second heat transfer pipe 7 on the same side, the heat transfer medium flows in from one end of the second heat transfer pipe 7, flows sequentially through the sub-cavities surrounding the first portion 25 of all the electrode extension body bodies located within the inner cavity of the second heat transfer pipe 7, and flows out from the other end of the second heat transfer pipe 7. A portion of the structure of the battery electrode extension 2 is directly placed inside the heat exchange channel. The electrode extension 2 and the top end face of the electrode 1 are in direct contact with the heat transfer medium. In conventional heat exchange methods, heat needs to pass through multiple levels of transfer to achieve exchange. However, in this embodiment, the electrode extension 2 is directly connected to the heat transfer medium, allowing the heat transfer medium to act directly on the electrode extension 2 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 4 is also greatly improved. The problem that battery performance might have deteriorated due to untimely heat exchange is solved by this efficient heat exchange design, thus ensuring that battery module 4 is always in good working condition, extending the service life of battery module 4 and improving its working stability.

[0180] In this embodiment, the second heat transfer tube 7 can be an electrical conductor, and the material can be a high-purity aluminum alloy, such as 6063 aluminum alloy. This material has good electrical conductivity, with a conductivity of 30-35 MS / m at 20℃, which can meet the requirements for current conduction; at the same time, it has excellent thermal conductivity, with a thermal conductivity of about 200-230 W / (m·K), which can efficiently achieve heat dissipation.

[0181] In this embodiment, the electrode extension members 2 on the same side of the battery component have the same polarity, and the electrode extension members 2 on different sides have opposite polarities. The two second heat transfer pipes 7 are respectively fixed on the electrode extension members 2 on both sides, so as to realize the parallel connection of multiple single cells 3.

[0182] Therefore, in this embodiment, the second heat transfer pipe 7 not only serves as a heat dissipation component but also as an electrical conductor to realize the parallel connection of multiple individual battery cells 3, which has at least the following advantages:

[0183] Firstly, the elimination of the need for dedicated conductive connectors simplifies the overall structure of the battery component. In traditional battery modules, heat dissipation and conductivity are often handled by different components, requiring complex structural layouts and connection designs. In this embodiment, the second heat transfer pipe 7 integrates heat dissipation and conductivity functions, reducing the need for dedicated conductive connectors and making the overall structure of the battery component simpler and more compact, thus reducing design complexity and the probability of errors.

[0184] Secondly, since the second heat transfer pipe 7 simultaneously performs heat dissipation and electrical conduction functions, it reduces the number of components in the battery assembly, thereby lowering the assembly difficulty and cost. Previously, separate heat dissipation pipes and conductive connectors were used, which not only resulted in a large number of components and increased procurement costs, but also required precise installation of each component during assembly, demanding high technical skills from assembly workers and leading to long assembly times.

[0185] Thirdly, the second heat transfer tube 7, as a parallel connector, is directly embedded in the second through groove 24 of the electrode extension 2, making full use of the space of the electrode extension 2 and avoiding the problem of additional conductive connectors occupying space, which is conducive to improving the integration of battery components.

[0186] Fourthly, the second heat transfer pipe 7, as a parallel connector, ensures a more uniform current distribution among the multiple individual battery cells 3, preventing individual cells from overheating and being damaged due to excessive current. The second heat transfer pipe 7 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 battery cells 3 are connected in parallel through the second heat transfer pipe 7, the current can flow evenly to each individual battery cell 3, avoiding excessive current in individual cells due to uneven current distribution, which could lead to overheating and damage. This effectively improves the overall performance and stability of the battery module 4.

[0187] To improve the connection stability between the second heat transfer tube 7 and the electrode extension 2, and to ensure efficient heat conduction and uniform current transfer, this embodiment optimizes the structure of the second heat transfer tube 7, such as... Figure 19 As shown, a second step structure 72 is provided on the outer wall of the second heat transfer tube 7 along its length. The horizontal surface of the second step structure 72 is flush with the top of the side wall of the second through groove 24. The joint between the horizontal surface of the second step structure 72 and the top of the side wall of the second through groove 24 is welded together.

[0188] It should be noted that the horizontal plane of the second step structure 72 mentioned above refers to the connection surface between the large-diameter section and the small-diameter section of the second heat transfer tube 7 in the z direction.

[0189] A second step structure 72 is provided on the outer wall of the second heat transfer tube 7, and the horizontal plane of the second step structure 72 is flush with the top of the side wall of the second through groove 24. At the same time, the joint is welded together, which has at least the following advantages:

[0190] Improved stability: The second-step structure 72 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.

[0191] Optimize thermal conductivity and electrical conductivity: The horizontal plane of the second step structure 72 is flush with the top of the side wall of the second through groove 24, ensuring a tighter contact between the second heat transfer tube 7 and the pole extension 2, 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 second heat transfer tube 7 and the pole extension 2, avoiding local current concentration or hot spots caused by poor contact.

[0192] Furthermore, during the welding process, conventional welding operations may damage the structure of the second heat transfer tube 7 due to factors such as high temperature and stress concentration, thus leading to potential leakage. The design of the second stepped structure 72, with its horizontal plane flush with the top of the sidewall of the second through groove 24, provides an ideal operating plane for laser welding along the z-direction, effectively preventing leakage problems caused by damage to the structure of the second heat transfer tube 7 during the welding process. When the heat transfer medium (such as coolant) flows within the second heat transfer tube 7, this design effectively prevents leakage of the heat transfer medium from the joint.

[0193] Example 4

[0194] This embodiment presents another type of battery component. Its structure differs from the battery component in Embodiment 3 in that the battery module 4 in this embodiment is the aforementioned third type of battery module, with the specific structure as follows: Figures 21 to 23 As shown.

[0195] In this embodiment, the third type of battery module arranges 12 individual battery components in the inner cavity of the outer shell 6, and each electrode extension 2 is located outside the outer shell 6. The second heat transfer pipe 7 is fixed on the electrode extension 2 located on the same side.

[0196] A support extending in the x-direction is provided between the bottom plate of the outer casing 6 and each individual battery assembly to form a liquid channel, serving as an electrolyte sharing chamber 61.

[0197] The top plate of the outer casing 6 may also be provided with a boss extending in the x direction, and a gas channel is opened on the boss, which serves as a gas sharing chamber 62.

[0198] This embodiment can achieve the assembly of battery components through the following process:

[0199] First, place 12 individual battery modules inside the housing 6, so that the terminals 1 of each individual battery 3 correspond one-to-one with the first clearance holes 60.

[0200] Then, the top plate of the outer shell 6 corresponding to the first clearance hole 60 is fixed and sealed to the outer shell 6 of the single battery 3, and an extension piece 2 is fixed on each pole post 1.

[0201] In this embodiment, a sealed connection is achieved by welding the edge of the first clearance hole 60 near the single cell 3 to the upper cover plate of the single cell 3, thus preventing external environmental interference with the internal environment of the battery through the gap between the first clearance hole 60 and the terminal post 1. Besides the welding method used in this embodiment, in some other embodiments, laser welding can also be used to weld the area around each first clearance hole 60 on the top plate of the outer casing 6 to the area around the corresponding terminal post 1 on the upper cover plate of the single cell 3.

[0202] The specific operation of fixing the pole extension 2 on the pole 1 is to insert the electrical connection post 22 of the pole extension 2 into the mounting hole 12 of the pole 1, and weld the outer wall of the electrical connection post 22 to the edge area of ​​the mounting hole 12 of the pole 1.

[0203] Finally, a sealing ring 63 is fitted onto the first part 25 of the electrode extension body of each electrode extension 2. Preferably, in the x-direction, the electrode extension 2 extends out from both sides of the sealing ring 63, and in the z-direction, the bottom of the sealing ring 63 is in close contact with the bottom of the second through groove 24, and the bottom of the extended electrode extension 2 is in close contact with the top plate of the outer casing 6. This arrangement can stabilize the position of the sealing ring 63 and prevent the sealing ring 63 from shifting during installation, thus affecting the sealing effect. Next, pick up two heat transfer tubes, one corresponding to the positive terminal side of the battery module 4 and the other corresponding to the negative terminal side. Align the heat transfer tubes with the corresponding side of the second through groove 24 and insert them into the second through groove 24. In this process, it is necessary to ensure that the first part 25 of the electrode extension body with the sealing ring 63 fitted on each electrode extension 2 extends into the second clearance hole 71 on the heat transfer tube one by one. During the insertion process, the action should be smooth to prevent the heat transfer tube from colliding with the electrode extension 2 and damaging the sealing ring 63 or causing the sealing ring 63 to shift. After the heat transfer tube is initially embedded in the second through groove 24, welding is performed between the heat transfer tube and the side wall of the second through groove 24. As welding progresses, the heat transfer tube gradually fuses with the side wall of the second through groove 24. During this process, the pressure generated by welding exerts a uniform and continuous squeezing effect on the sealing ring 63 fitted on the first part 25 of the pole extension body. After being squeezed, the sealing ring 63 undergoes elastic deformation, tightly filling the tiny gap between the pole extension 2 and the second clearance hole 71, thereby achieving an efficient and reliable seal and effectively preventing the heat transfer medium in the flow cavity from overflowing.

[0204] Example 5

[0205] To further improve the heat exchange performance of the pole extension member 2 in Embodiments 3 and 4, this embodiment, based on the pole extension member 2 in the above embodiments, provides a functional structure that increases the heat exchange area on the first part 25 of the pole extension member body. Such functional structure may include dot-shaped pits and protrusions on the outer wall of the first part 25 of the pole extension member body, and may also include annular grooves on the outer wall of the first part 25 of the pole extension member body, and may also include through grooves and through holes on the first part 25 of the pole extension member body.

[0206] like Figure 13 , Figure 14 and Figure 19As shown, in this embodiment, a through hole 27 is provided on the first part 25 of the pole extension body as a functional structure. The through hole 27 penetrates the first part 25 of the pole extension body along the x-direction. 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 extension 2 is not affected. Providing through holes increases the contact area between the pole extension body 21 and the heat transfer medium, thereby significantly improving heat transfer efficiency. When the heat transfer medium flows through the pole extension body 21, it can more fully surround the pole extension body 21 through the through holes. Previously, the heat transfer medium could only exchange heat with the surface of the pole extension body 21; 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 extension 2.

Claims

1. A pole, characterized by: The installation hole is used for inserting part of the structure of the pole post extension piece, connecting the pole post body and the pole post extension piece, and the top end of the pole post extension piece is higher than the top end of the pole post body.

2. The pole according to claim 1, characterized in that: The hole edge of the installation hole is used as a welding part for welding connection with the pole post extension piece.

3. A pole extension for connection with a pole according to claim 1 or 2, characterized in that: The pole post extension piece body is provided with an electric connection column at the bottom of the pole post extension piece body and protruding from the pole post extension piece body.

4. The pole extension of claim 3, wherein: The pole post extension piece body is provided with a heat transfer member installation structure for installing a heat transfer member to realize heat exchange of the pole post extension piece.

5. The pole extension of claim 4, wherein: The heat transfer member installation structure is a first through groove provided on the pole post extension piece body, and the inner cavity of the first through groove is used for clamping a tubular heat transfer member.

6. The pole extension of claim 4, wherein: The heat transfer member installation structure is two second through grooves provided on the pole post extension piece body, and the two second through grooves are arranged along a second direction, and each second through groove penetrates the pole post extension piece body along a first direction. The pole post extension piece body part between the two second through grooves is defined as a first part of the pole post extension piece body. The two second through grooves are used for fixing the heat transfer member, and the first part of the pole post extension piece body is located in the inner cavity of the heat transfer member; wherein the first direction and the second direction are perpendicular to each other.

7. A monobloc battery assembly characterized by: The pole post extension piece is the pole post extension piece according to any one of claims 3 to 6. The electric connection column on the pole post extension piece is inserted into the installation hole on the pole post body to connect with the pole post body; and the top end of the pole post extension piece is higher than the top end of the pole post body, and the bottom end of the pole post extension piece maintains an electrically conductive safety distance with the upper cover plate of the single battery.

8. The monobloc cell assembly of claim 7, wherein: An electrically conductive coating is provided between the inner wall of the installation hole and the outer wall of the electric connection column.

9. A battery component, characterized by: The battery module comprises a plurality of single battery assemblies arranged along a first direction; the single battery assembly is the single battery assembly according to claim 7 or 8; the pole post extension piece on each single battery assembly is used for connecting with an electric connection piece to realize electric connection between each single battery assembly.

10. The battery member of claim 9, wherein: The heat transfer member is fixed on each pole post extension piece through the heat transfer member installation structure to realize heat exchange of the pole post extension piece.

11. The battery member of claim 9, wherein: The plurality of single battery assemblies are arranged in the shell along the first direction. A first avoiding hole corresponding to the pole post extension piece of each single battery assembly is provided on the top plate of the shell, the pole post extension piece extends out of the corresponding first avoiding hole, and the first avoiding hole corresponding to the area of the top plate of the shell is sealed with the upper cover plate of the single battery.

12. The battery member of any one of claims 9 to 11, wherein: The electrolyte and / or gas between each single battery is shared.

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