Battery pole and battery device
By introducing heat dissipation blind holes and fin assemblies into the lithium battery terminals, the problem of low heat dissipation efficiency of the terminals is solved, achieving more efficient thermal management and improving the safety and reliability of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-03-31
AI Technical Summary
Lithium battery terminals have low heat dissipation efficiency during high-current charging and discharging, leading to heat accumulation, affecting the aging of insulating plastic parts and sealing rings, causing safety hazards, and limiting battery performance and safety.
The electrode body is designed with a heat dissipation section and a mating section. Combined with internal heat dissipation blind holes and external heat dissipation fins, it forms an efficient heat dissipation network to ensure the battery's sealing and structural stability.
It significantly improves the battery's heat dissipation efficiency, reduces the terminal temperature, extends the lifespan of the sealing ring and insulating plastic parts, and enhances the battery's reliability and safety.
Smart Images
Figure CN121769455A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to battery terminals and battery devices. Background Technology
[0002] Lithium-ion batteries, with their advantages of high energy density and long cycle life, have been widely used in many fields. As battery applications continue to expand, the market is placing increasingly higher demands on the high-current charge and discharge performance of batteries. The lithium-ion battery top cover module, as a crucial component of the battery, mainly includes a substrate, terminals, upper plastic parts, lower plastic parts, and an explosion-proof valve.
[0003] In existing technologies, lithium battery terminals are typically metal cylindrical structures, fixed to a substrate by injection-molded insulating plastic parts and sealing rings, and connected to the internal cell's tabs via a terminal base plate. However, under high-current charging and discharging conditions, according to Joule's law, the large current flowing through the terminals generates a significant amount of heat. Existing terminal structures have low heat dissipation efficiency, causing heat to easily accumulate at the terminal root and around the insulating plastic parts, forming localized hot spots. Excessively high localized temperatures accelerate the aging of polymer materials such as insulating plastic parts and sealing rings, leading to decreased insulation performance or seal failure, and consequently, leakage and other safety hazards, severely impacting the battery module's lifespan and safety performance. Simultaneously, insufficient thermal management capabilities limit the battery's ability to operate safely at higher currents, becoming a bottleneck restricting the overall performance of the battery. Summary of the Invention
[0004] Based on this, a battery terminal and a battery device are provided to solve the problem of low heat dissipation efficiency of the terminal.
[0005] An embodiment of the first aspect of this application provides a battery terminal, comprising:
[0006] The electrode body has a heat dissipation section and a mating section along its axial direction, the mating section being used for sealing mating with an insulating component;
[0007] An internal heat dissipation module is at least partially disposed in the heat dissipation section, including blind heat dissipation holes opened on the outer wall of the pole body;
[0008] An external heat dissipation module is disposed in the heat dissipation section, including a heat dissipation fin assembly disposed on the outer wall of the pole body.
[0009] In one embodiment, the depth of the heat dissipation blind hole ranges from 0.1mm to 6mm;
[0010] And / or, the heat dissipation blind hole is opened on the end face of the pole post, and the depth of the heat dissipation blind hole is not less than 50% of the axial height of the heat dissipation section.
[0011] In one embodiment, the heat dissipation blind hole is configured as a circular blind hole and / or annular blind hole.
[0012] In one embodiment, the heat dissipation fin assembly includes a plurality of heat dissipation fin units, which are uniformly distributed on the circumferential outer wall of the heat dissipation section.
[0013] In one embodiment, the height of the heat dissipation fin unit along the axial direction of the pole body ranges from 4mm to 10mm;
[0014] And / or, the thickness of the heat dissipation fin unit along the radial direction of the pole body is 1mm-3mm.
[0015] In one embodiment, the exposed corners of the heat dissipation fin unit are provided with a rounded corner structure.
[0016] In one embodiment, the heat dissipation fin unit includes a plurality of heat dissipation fins arranged at axial intervals along the pole body.
[0017] In one embodiment, the battery terminal post further includes a terminal post base plate, which is fixedly connected to the mating section; wherein the material of the terminal post body is aluminum, and the material of the terminal post base plate is aluminum or copper;
[0018] And / or, the pole body, the internal heat dissipation module and the internal heat dissipation module are integrally formed by cold forging and then precision-finished by machining.
[0019] An embodiment of the second aspect of this application provides a battery device including the battery terminals described in any of the above embodiments.
[0020] In one embodiment, the battery device further includes:
[0021] An insulating plastic part, wherein the insulating plastic part is provided with a heat dissipation avoidance structure and a contact sealing area;
[0022] The heat dissipation avoidance structure is configured as a thin sheet structure and covers the external heat dissipation module;
[0023] The contact sealing area is configured with an open structure and is sealed to the mating section.
[0024] According to the battery terminals and battery device of the embodiments of this application, the inner wall surface of the heat dissipation blind hole constitutes a first heat dissipation surface, used to dissipate heat from the core area of the terminal, i.e., the interior, outward. Specifically, the core area of the terminal has the highest temperature when it is working, and the inner wall of the heat dissipation blind hole can directly contact the core heat source, conducting the internal heat to the air inside the hole or directly to the outer wall of the terminal body; at the same time, the design of the blind hole avoids penetrating the terminal body, preventing leakage of electrolyte inside the battery, thus balancing heat dissipation and sealing. The outer wall surface of the heat dissipation fin assembly constitutes a second heat dissipation surface, with the fins extending outward, significantly increasing the contact area between the terminal and the outside air, improving the convective heat transfer efficiency, and thus improving the heat dissipation effect. The segmented design of the heat dissipation section and the mating section ensures that the battery terminal does not affect its assembly with the insulating components, guaranteeing the battery's sealing and structural stability. With the above settings, heat dissipation efficiency is significantly improved. Through the synergistic effect of internal and external heat dissipation modules, a heat dissipation network is constructed for the terminal body, which multiplies its heat dissipation surface area and significantly reduces the temperature rise of the battery terminal. At the same time, it enhances battery reliability and safety, effectively reduces the operating temperature of the terminal, slows down the aging rate of the sealing ring and insulating plastic parts, and improves the long-term reliability and safety of the battery device. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of a battery terminal in a battery device according to an embodiment of this application.
[0026] Figure 2 for Figure 1 A sectional view.
[0027] Figure 3 This is a schematic diagram of the structure of a battery terminal according to an embodiment of this application.
[0028] Figure 4 This is a schematic diagram of the structure of a battery terminal according to another embodiment of this application.
[0029] Figure 5 This is a schematic diagram of the structure of the insulating plastic part in a battery device according to an embodiment of this application.
[0030] Figure label:
[0031] 1000, battery terminals;
[0032] 100. Terminal body; 110. Heat dissipation section; 120. Fitting section;
[0033] 200. Internal heat dissipation module; 210. Heat dissipation blind hole; 211. Circular blind hole; 212. Annular blind hole;
[0034] 300. External heat dissipation module; 310. Heat dissipation fin assembly; 311. Heat dissipation fin unit; 3111. Rounded corner structure; 3112. Heat sink;
[0035] 400. Pole post base plate;
[0036] 2000, Insulating plastic parts; 2100, Heat dissipation and clearance structure; 2200, Contact sealing area;
[0037] 3000, sealing ring. Detailed Implementation
[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.
[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0044] See Figure 1 and Figure 2 At least one embodiment of this application provides a battery terminal 1000, which includes a terminal body 100, an internal heat dissipation module 200, and an external heat dissipation module 300. The terminal body 100 has a heat dissipation section 110 and a mating section 120 along its axial direction. The mating section 120 is used for sealing mating with an insulating component. The internal heat dissipation module 200 is at least partially disposed in the heat dissipation section 110 and includes a heat dissipation blind hole 210 formed on the outer wall of the terminal body 100. The external heat dissipation module 300 is disposed in the heat dissipation section 110 and includes a heat dissipation fin assembly 310 disposed on the outer wall of the terminal body 100. The heat dissipation blind hole 210 refers to a hole that is open at one end and closed at the other end, as opposed to a through hole.
[0045] According to the battery terminal 1000 of this application embodiment, the inner wall surface of the heat dissipation blind hole 210 constitutes a first heat dissipation surface, used to dissipate heat from the core area of the terminal, i.e., the interior, outward. Specifically, the core area has the highest temperature when the terminal is working, and the inner wall of the heat dissipation blind hole 210 can directly contact the core heat source, conducting the internal heat to the air inside the hole or directly to the outer wall of the terminal body 100; at the same time, the design of the blind hole avoids penetrating the terminal body 100, preventing leakage of electrolyte inside the battery, thus balancing heat dissipation and sealing. The outer wall surface of the heat dissipation fin assembly 310 constitutes a second heat dissipation surface, with the fins extending outward, significantly increasing the contact area between the terminal and the outside air, improving the convective heat transfer efficiency, and thus improving the heat dissipation effect. The segmented design of the heat dissipation section 110 and the mating section 120 ensures that the battery terminal 1000 does not affect its assembly with the insulating components, guaranteeing the battery's sealing and structural stability. Through the synergistic effect of the internal heat dissipation module 200 and the external heat dissipation module 300, a heat dissipation network is constructed for the terminal body 100, which multiplies its heat dissipation surface area and significantly reduces the temperature rise of the battery terminal 1000. At the same time, it enhances the reliability and safety of the battery, effectively reduces the operating temperature of the terminal, slows down the aging rate of the sealing ring 3000 and the insulating plastic part 2000, and improves the long-term reliability and safety of the battery device.
[0046] In some embodiments, the depth of the heat dissipation blind hole 210 ranges from 0.1 mm to 6 mm.
[0047] Specifically, the depth range of the heat dissipation blind hole 210 refers to the vertical distance from the open end of the pole end face to the closed end of the blind hole, which is limited to 0.1mm-6mm, so as to ensure the heat dissipation effect without compromising the structural strength and sealing reliability of the pole body 100.
[0048] If the depth of the heat dissipation blind hole 210 is less than 0.1mm, the inner wall area of the heat dissipation blind hole 210 is too small, resulting in insufficient heat dissipation contact surface and inability to effectively contact the core heat source area of the pole body 100. A depth of 0.1mm allows for a smaller overall pole size while still providing a basic inner wall heat dissipation area to meet the auxiliary heat dissipation needs in low-power scenarios.
[0049] If the blind hole depth exceeds 6mm, the remaining wall thickness of the terminal block 100 will be too thin, especially in scenarios with a small terminal block diameter. This leads to a decrease in the mechanical strength of the terminal block 100, making it prone to deformation during assembly and breakage under stress, thus affecting the stability of the battery structure. Excessively deep blind holes increase processing difficulty and may also compromise the material density inside the terminal block, indirectly affecting sealing performance. A depth of 6mm maximizes the internal heat dissipation area without imposing additional burdens on the structure and processing technology of the terminal block 100.
[0050] For low-current, small-size battery terminals 1000, such as batteries for portable electronic devices, shallow blind holes of 0.1mm-2mm can be selected to meet basic heat dissipation requirements, with the focus on ensuring terminal strength; for high-current, large-size battery terminals 1000, such as power batteries for new energy vehicles, deep blind holes of 2mm-6mm can be selected to maximize the heat dissipation area of the inner wall and cope with the large amount of heat generated under high-power conditions.
[0051] See Figure 2 and Figure 3 In some embodiments, the heat dissipation blind hole 210 is formed on the end face of the pole post, and the depth of the heat dissipation blind hole 210 is not less than 50% of the axial height of the heat dissipation section 110 to ensure effective coverage of the core heat source area. Specifically, the depth of the heat dissipation blind hole 210 is the vertical distance from the end face of the pole post body 100 to the bottom closed end of the heat dissipation blind hole 210. The depth of the heat dissipation blind hole 210 is greater than or equal to half of the total height of the heat dissipation section 110. The depth of the heat dissipation blind hole 210 is deep enough that its inner wall can fully contact the core heat source area and efficiently dissipate the internal heat.
[0052] See Figure 3 and Figure 4 In some embodiments, the heat dissipation blind hole 210 is configured as a circular blind hole 211 and / or an annular blind hole 212. Specifically, the cross-sectional shape of the heat dissipation blind hole 210 can be either circular or annular, and the two shapes can be used individually or in combination.
[0053] In some embodiments, when the heat dissipation blind hole 210 is a circular blind hole 211, it is located at the center of the pole body 100; when the heat dissipation blind hole 210 is an annular blind hole 212, its axis coincides with the axis of the pole body 100.
[0054] The circular blind hole 211 has a complete circular cross-section, suitable for situations where the diameter of the pole body 100 is small and the core heat source is concentrated at the center of the pole body 100. The hole wall surrounds the central heat source of the pole, allowing direct contact with the core heat-generating area, resulting in the shortest heat conduction path and high heat extraction efficiency.
[0055] The annular blind hole 212 has an annular cross-section, with its axis coinciding with the axis of the electrode body 100. It is suitable for electrodes with large diameters and where the heat source is distributed in annular areas from the center to the edge of the electrode, such as large-sized electrodes in new energy vehicles and energy storage devices. It has a large coverage area, providing a larger heat dissipation contact surface than a circular hole of the same diameter, thus covering a wider heat source area inside the electrode. The annular structure is distributed around the electrode axis, ensuring a more uniform path for heat conduction from the inside of the electrode to the annular hole wall, avoiding localized heat dissipation dead zones.
[0056] When the circular blind hole 211 and the annular blind hole 212 are used in combination, a circular blind hole 211 is formed at the center of the electrode body 100, and an annular blind hole 212 is formed at the same end face and the same or different depths around the circular blind hole 211, forming a nested structure of a central cylindrical hole combined with an outer annular groove. This is suitable for high-power scenarios where the electrode diameter is large and the heat source is concentrated in the center and dispersed in the peripheral area, such as high-current electrode posts in power batteries. Combining the advantages of both hole types, the central circular hole covers the core heat source, and the outer annular hole covers the heat source in the middle area, maximizing the heat dissipation contact surface and coping with the large amount of heat generated under high current.
[0057] See Figure 3 In some embodiments, the heat dissipation fin assembly 310 includes multiple heat dissipation fin units 311, which are uniformly distributed on the circumferential outer wall of the heat dissipation section 110. The heat dissipation fin assembly 310 expands the heat dissipation area through multiple heat dissipation fin units 311, making it more flexible and efficient than a single integral fin. Each heat dissipation fin unit 311 is an independent heat dissipation contact surface, collectively forming a second heat dissipation surface. The heat dissipation section 110 of the pole body 100 is used only, without involving the mating section 120, to avoid affecting the assembly with the insulating plastic part 2000. Gap channels are formed between the multiple heat dissipation fin units 311, allowing outside air to flow through the gaps across the inner and outer surfaces of all fin units, significantly improving convection efficiency. When the pole is working, heat is uniformly conducted to the outer wall along the circumferential direction, and the uniformly distributed heat dissipation fin units 311 can simultaneously remove heat from all directions.
[0058] In some embodiments, the height of the heat dissipation fin unit 311 along the axial direction of the pole body 100 ranges from 4mm to 10mm; the thickness of the heat dissipation fin unit 311 along the radial direction of the pole body 100 ranges from 1mm to 3mm. Through the above configuration, the heat dissipation surface area is maximized while ensuring the structural strength of the heat dissipation fin unit 311. This ensures that the fins will not break or deform due to being too thin or too high, while also maximizing the heat dissipation surface area of the fins.
[0059] In some embodiments, the exposed corners of the heat dissipation fin unit 311 are provided with rounded corner structures 3111 to avoid stress concentration. The heat dissipation fin unit 311 is a thin sheet structure extending radially outward along the pole body 100, and it has multiple corners. As an extension of the pole body 100, the root of the heat dissipation fin unit 311, which connects to the pole body 100, and its own corners are structural weak points. During operation, the pole body 100 undergoes thermal expansion and contraction. The thermal expansion of the metal can cause stress concentration at the sharp corners. Long-term repeated thermal expansion and contraction can lead to microcracks at these sharp corners, and in severe cases, fin breakage. By providing the rounded corner structure 3111, the arc structure can disperse stress, preventing force concentration at a single point, making the stress on the fins more uniform, significantly improving its fatigue resistance and service life, and preventing fracture failure due to thermal stress.
[0060] See Figure 4 In some embodiments, the heat dissipation fin unit 311 includes a plurality of heat dissipation fins 3112 arranged at intervals along the axial direction of the pole body 100. The heat dissipation fin unit 311 is originally an independent unit of the external heat dissipation module 300. Here, the individual heat dissipation fin unit is further divided into a combination of several small heat dissipation fins 3112. The multiple small heat dissipation fins 3112 are arranged separately along the axial direction at the same position of the heat dissipation fin unit 3111, with gaps between adjacent heat dissipation fins 3112. The size of the gaps is usually designed according to the heat dissipation requirements and structural strength. Compared with the single-piece design, it increases the inner contact surface, and the gaps allow air to flow through the inner side, which is equivalent to each small heat dissipation fin 3112 achieving double-sided heat dissipation. At the same axial height, the total heat dissipation surface area of the multi-piece spaced design is larger than that of the single-piece design, and the heat dissipation efficiency is higher. It is especially suitable for high current and high heat scenarios. Air can flow both circumferentially along the pole body and axially through the gaps, covering the inner and outer surfaces of all heat dissipation fins 3112 and avoiding airflow dead zones. In addition, by splitting the long fins into short heat sinks 3112, the axial height of each heat sink 3112 is reduced, and the deformation range of thermal expansion and contraction is also reduced. The thermal stress is distributed to multiple short heat sinks 3112, avoiding large deformation of a single long fin.
[0061] See Figure 2 In some embodiments, the battery terminal also includes a terminal base plate 400, which is fixedly connected to the mating section 120. The terminal base plate 400 is used to connect the terminal body 100 to the tabs of the battery cell inside the battery, and at the same time provides a certain degree of support and fixation for the terminal body 100.
[0062] The electrode body 100 is made of aluminum, and the electrode base plate 400 is made of either aluminum or copper. Specifically, the electrode body 100 is made of aluminum, which provides good electrical and thermal conductivity. The electrode base plate 400 is made of aluminum for the positive electrode and copper for the negative electrode, depending on the type of electrode.
[0063] It is understandable that, when the pole body 100 is provided, the closed end of the heat dissipation blind hole 210 can be configured as the surface of the pole body 100.
[0064] In some embodiments, the pole body 100, the internal heat dissipation module 200, and the internal heat dissipation module 200 are integrally formed by cold heading and then precision-finished by machining. The cold heading process employs a multi-station cold heading process to efficiently and integrally form the overall outline of the pole body 100, the internal heat dissipation module 200, and the initial shape of the internal heat dissipation module. Subsequent machining is used to refine the dimensions and ensure the accuracy of each mating surface.
[0065] The pole body 100, the internal heat dissipation module 200, and the internal heat dissipation module 200 are an organic whole, formed by cold heading, avoiding connection defects caused by welding or assembly after separate manufacturing. The structure is denser and the overall integrity is stronger. During the cold heading process, the grains of the metal billet are distributed along the forming direction, resulting in higher mechanical strength than machining. This better copes with thermal expansion and contraction, assembly stress, and other conditions, preventing fin breakage and blind hole deformation. The multi-station cold heading process is a continuous automated production process. The metal billet is formed from feed to rough blank, resulting in high processing efficiency. The cold heading process can effectively control production costs and meet the market's demand for large-scale supply.
[0066] At least one embodiment of this application provides a battery device including the battery terminal 1000 of any of the above embodiments.
[0067] See Figure 2 and Figure 5 In some embodiments, the battery device further includes an insulating plastic part 2000, which is provided with a heat dissipation clearance structure 2100 and a contact sealing area 2200; wherein, the heat dissipation clearance structure 2100 is configured as a thin sheet structure and covers the external heat dissipation module 300; the contact sealing area 2200 is configured as an open structure and is sealed to the mating section 120.
[0068] According to the battery device of this application embodiment, the temperature rise of the battery terminal 1000 can be significantly reduced, while enhancing battery reliability and safety. This effectively lowers the terminal operating temperature, slows down the aging rate of the sealing ring 3000 and the insulating plastic part 2000, and improves the long-term reliability and safety of the battery. It effectively increases the upper limit of battery performance; the excellent thermal management capability allows the battery to withstand higher current charging and discharging conditions, contributing to improved peak power performance of the battery device.
[0069] In some embodiments, the insulating plastic part 2000 is made of a modified engineering plastic, such as PPS, that is resistant to high temperatures and has excellent insulation properties. The upper part of the insulating plastic part 2000 is designed as a thin sheet structure to ensure external insulation without affecting the heat dissipation of the heat sink assembly 310.
[0070] When the heat sink assembly 310 is configured as multiple heat sink units 311, the heat sink units 311 are evenly distributed on the circumferential outer wall of the heat dissipation section 110. The heat dissipation clearance structure 2100 is configured as multiple clearance slots corresponding to the heat sink units 311, into which the heat sink units 311 extend to cover the heat sink units 311.
[0071] The lower part of the insulating plastic part 2000 is provided with an opening, which fits tightly with the mating section 120 of the terminal body 100. During assembly, the mating section 120 of the terminal body 100 fits tightly with the contact sealing area 2200 and the sealing ring 3000 of the insulating plastic part 2000, and is fixed to the battery cover. When a large current passes through, heat is efficiently dissipated to the outside through both the internal heat dissipation module 200 and the external heat dissipation module 300.
[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A battery post, characterized by, The battery pole comprises: a pole body having a heat dissipation section and a fitting section along an axial direction thereof, the fitting section being configured to sealingly fit with an insulation member; an internal heat dissipation module at least partially arranged in the heat dissipation section, comprising a heat dissipation blind hole formed in an outer wall of the pole body; an external heat dissipation module arranged in the heat dissipation section, comprising a heat dissipation fin assembly arranged in the outer wall of the pole body.
2. The battery post of claim 1, wherein The depth of the heat dissipation blind hole ranges from 0.1 mm to 6 mm. The heat dissipation blind hole is formed in an end surface of the pole body, and the depth of the heat dissipation blind hole is not less than 50% of the axial height of the heat dissipation section.
3. The battery post of claim 1, wherein The heat dissipation blind hole is configured as a circular blind hole and / or an annular blind hole.
4. The battery post of claim 1, wherein The heat dissipation fin assembly comprises a plurality of heat dissipation fin units uniformly distributed in a circumferential outer wall of the heat dissipation section.
5. The battery post of claim 4, wherein, The axial height of the heat dissipation fin unit ranges from 4 mm to 10 mm. The radial thickness of the heat dissipation fin unit ranges from 1 mm to 3 mm.
6. The battery post of claim 4, wherein The outer corner of the heat dissipation fin unit is provided with a rounded corner structure.
7. The battery post of claim 4, wherein The heat dissipation fin unit comprises a plurality of heat dissipation fins arranged at intervals along the axial direction of the pole body.
8. The battery post of any one of claims 1-7, wherein, The battery pole further comprises a pole bottom plate fixedly connected with the fitting section; the material of the pole body is aluminum, and the material of the pole bottom plate is aluminum or copper. The pole body, the internal heat dissipation module and the external heat dissipation module are integrally formed by a cold heading process and then finely processed by a machining process.
9. A battery device characterized by comprising: The battery pole according to any one of claims 1-8.
10. The battery device of claim 9, wherein, The battery device further comprises: an insulation plastic member provided with a heat dissipation avoiding structure and a contact sealing area; The heat dissipation avoiding structure is configured as a sheet structure and covers the external heat dissipation module. The contact sealing area is configured as an opening structure and sealingly fits with the fitting section.