A battery top cover assembly and a battery

Abstract

The utility model belongs to battery technical field discloses a kind of battery top cover assembly and battery, the battery top cover assembly includes: top cover sheet and pole post;The top cover sheet is equipped with pole post hole, multiple clamping blocks are arranged at the inside of pole post hole interval;The pole post includes pole post seat and the clamping part formed by protruding from the pole post seat middle upward, the clamping part is contained in the inside of pole post hole, and the clamping part is connected with the clamping block cooperation.This utility model is through the cooperation of clamping block and clamping part, avoids the problem of virtual welding, welding is not firm, also does not need additional threaded fastening and sealing operation, improves the connection strength and stability between pole post and top cover sheet, also avoids the problem that plastic fixed pole post top cover, weak impact resistance, poor high-temperature resistance and poor anti-aging ability, simplifies assembly process, reduces assembly step and required auxiliary parts, reduces artificial operation difficulty and time cost, improves production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology and relates to a battery top cover assembly and a battery. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and consumer electronics, lithium-ion batteries have become the mainstream choice due to their high energy density and long cycle life. As a crucial component of the battery, the battery top cover assembly's structural design directly affects the battery's safety, sealing, electrical connection stability, and overall lifespan.

[0003] Currently, the connection methods between the terminals and the top cover in common battery top cover assemblies have many shortcomings. Some use simple welding, threaded connections, or injection molding. Welding methods are prone to problems such as incomplete welds and weak welds, resulting in insufficient connection strength between the terminals and the top cover. During battery use, especially when subjected to external forces such as vibration and impact, the terminals may loosen or even fall off, affecting the normal operation of the battery and potentially causing short circuits and other safety hazards. Threaded connections have problems such as low assembly efficiency and the need for additional sealing measures to prevent electrolyte leakage, increasing production costs and the complexity of the manufacturing process. Injection-molded terminals and top covers are entirely fixed by plastic, which has weak impact resistance, poor high-temperature resistance, and poor aging resistance.

[0004] Therefore, there is an urgent need in the field for a battery top cover assembly and a battery to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of this, the purpose of this utility model is to solve the above problems and provide a battery top cover assembly, including: a top cover sheet and a terminal post;

[0006] The top cover plate is provided with pole hole, and multiple locking blocks are spaced apart inside the pole hole;

[0007] The pole includes a pole seat and a snap-fit ​​portion protruding upward from the middle of the pole seat. The snap-fit ​​portion is accommodated inside the pole hole and is engaged with the snap block.

[0008] As a further improvement of this utility model, it also includes a retaining ring, which is sleeved on the outside of the retaining block;

[0009] The upper surface of the card block is provided with a first step;

[0010] The lower surface of the retaining ring is provided with a first retaining groove at intervals, and a portion of the first stepped portion is embedded inside the first retaining groove.

[0011] As a further improvement of this utility model, a welding groove is provided between two adjacent first slots, and the welding groove is welded to the top cover plate.

[0012] As a further improvement of this utility model, the upper surface of the top cover is provided with a second slot, the second slot is provided at intervals along the periphery of the pole hole, and a portion of the first step portion is embedded in the second slot.

[0013] As a further improvement of this utility model, the lower surface of the card block is provided with a second step;

[0014] The snap-fit ​​portion includes a first protruding ring, a second protruding ring, and an annular groove disposed between the first protruding ring and the second protruding ring;

[0015] The second step is embedded inside the annular groove.

[0016] As a further improvement of this utility model, it also includes a lower plastic, which has a through hole, and the snap-fit ​​part passes through the through hole.

[0017] As a further improvement of this utility model, the snap-fit ​​part is fitted with a sealing ring, the upper end face of the sealing ring abuts against the lower plastic, and the lower end face of the sealing ring abuts against the pole seat.

[0018] As a further improvement of this utility model, it also includes an upper plastic, which is sleeved on the snap-fit ​​portion and covers the snap-fit ​​block and the snap-fit ​​ring.

[0019] As a further improvement of this utility model, the top cover plate is also provided with an explosion-proof hole and a liquid injection hole, and an explosion-proof valve is installed in the explosion-proof hole.

[0020] This utility model also provides a battery, including a battery casing, a battery cell encapsulated in the battery casing, and the aforementioned battery top cover assembly, wherein the battery top cover assembly encloses the battery cell within the battery casing.

[0021] The technical advantages of this utility model are as follows: Compared with the prior art, the battery top cover assembly and battery provided by this utility model, through the cooperation of the locking block and the locking part, eliminate the need for complex welding processes compared to traditional welding or threaded connections, avoiding problems such as incomplete welding and weak welding; it also eliminates the need for additional thread tightening and sealing operations, reducing the risk of loosening or falling off of the terminals, and greatly improving the connection strength and stability between the terminals and the top cover plate. When the battery is subjected to external forces such as vibration and impact, it can ensure that the terminals and the top cover plate always maintain a reliable connection, ensuring the normal operation of the battery and reducing the probability of short circuits and other safety hazards; it also avoids the problems of injection molding and plastic coating, where the terminals and top cover are fixed by plastic, which has weak impact resistance, poor high temperature resistance, and poor aging resistance. The cooperation between the locking block and the locking part simplifies the assembly process, reduces assembly steps and required auxiliary parts, reduces the difficulty of manual operation and time costs, enables rapid assembly, improves production efficiency, and also reduces production costs and the complexity of the production process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model, not all embodiments. For those skilled in the art, other drawings obtained from these drawings without creative effort are all within the protection scope of this utility model.

[0023] Figure 1 This is a perspective view of a battery top cover assembly provided in an embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 Cross-sectional view at point AA;

[0025] Figure 3 This is an exploded view of a battery top cover assembly provided in an embodiment of this utility model.

[0026] Among them, 10 is the top cover plate, 11 is the pole hole, 12 is the locking block, 121 is the first step, 122 is the second step, 13 is the second slot, 14 is the explosion-proof hole, 141 is the explosion-proof valve, and 15 is the liquid injection hole;

[0027] 20 is the pole post, 21 is the pole post seat, 22 is the snap-fit ​​part, 221 is the first convex ring, 222 is the second convex ring, 223 is the annular groove, and 23 is the sealing ring;

[0028] 30 is a retaining ring, 31 is the first retaining groove, and 32 is a welding groove;

[0029] 40 is the bottom plastic part, and 41 is a through hole;

[0030] 50 is for plastic. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0032] To make the description of this disclosure more detailed and complete, illustrative descriptions of the embodiments and specific examples of this utility model are provided below; however, this is not the only form of implementing or using the specific embodiments of this utility model. The embodiments cover the features of multiple specific embodiments and the methods, steps, and sequences for constructing and operating these specific embodiments. However, other specific embodiments can also be used to achieve the same or equivalent functions and sequence of steps. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0035] In the description of this utility model, the terms "front", "rear", "top", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0036] Please refer to Figures 1-3 One embodiment of this utility model provides a battery top cover assembly and a battery to solve the problems of incomplete welding and weak welding in the welding method of the prior art, low assembly efficiency of threaded connection, weak impact resistance, poor high temperature resistance and poor aging resistance of plastic fixed pole 20 top cover.

[0037] Specifically, please refer to Figure 1 This is a perspective view of a battery top cover assembly provided in an embodiment of the present invention. The battery top cover assembly includes a top cover sheet 10 and a terminal post 20; please refer to [link / reference]. Figures 2-3 The top cover plate 10 is provided with a pole hole 11, and a plurality of locking blocks 12 are spaced apart inside the pole hole 11, forming a ring-shaped locking structure. The pole 20 includes a pole seat 21 and a locking part 22 protruding upward from the middle of the pole seat 21. The locking part 22 is housed inside the pole hole 11, and the locking part 22 is engaged with the locking block 12. The locking part 22 is inserted into the pole hole 11 and forms a mechanical lock with the locking block 12, realizing a stable connection between the pole 20 and the top cover plate 10. In some embodiments, the locking block 12 may adopt a sloped or stepped structure, and the locking part 22 is correspondingly designed as a ring-shaped boss or groove, so that the two are locked by interference fit or rotation buckle during assembly, preventing the pole 20 from loosening or falling off, and ensuring a stable connection between the pole 20 and the top cover plate 10.

[0038] The battery top cover assembly provided in this embodiment, through the cooperation of the locking block 12 and the locking part 22, eliminates the need for complex welding processes compared to traditional welding or threaded connections, avoiding problems such as incomplete welding and weak welds. It also eliminates the need for additional thread tightening and sealing operations, reducing the risk of the terminal post 20 loosening or falling off, and greatly improving the connection strength and stability between the terminal post 20 and the top cover plate 10. When the battery is subjected to external forces such as vibration and impact, it ensures that the terminal post 20 and the top cover plate 10 maintain a reliable connection, guaranteeing the normal operation of the battery and reducing the probability of short circuits and other safety hazards. It also avoids the problems of injection molding and plastic coating, where the plastic used to fix the terminal post 20 top cover has weak impact resistance, poor high-temperature resistance, and poor aging resistance. The cooperation between the locking block 12 and the locking part 22 simplifies the assembly process, reduces assembly steps and required auxiliary parts, lowers the difficulty of manual operation and time costs, enables rapid assembly, improves production efficiency, and also reduces production costs and the complexity of the production process. Meanwhile, the stable connection provides a good foundation for the subsequent sealing structure. The tightly connected terminal post 20 and top cover plate 10 can better cooperate with sealing components such as sealing ring 23, reducing gaps and leakage points, thereby effectively preventing external moisture, air and other substances from entering the battery and preventing them from chemically reacting with the active materials inside the battery. This helps to improve battery performance and extend service life, and reduces the possibility of serious consequences such as battery bulging and explosion.

[0039] As a further improvement of this utility model, the locking block 12 is made of ceramic material, and there are 4 locking blocks 12. By setting the locking block 12 to be made of ceramic material, the structural strength can be ensured, and the overall structural strength of the top cover pole 20 position can be improved while having good insulation performance. In some embodiments, the locking block 12 can also be made of other insulating materials with high hardness, such as mica, boron nitride-based composite materials, diamond, etc.

[0040] As a further improvement of this utility model, it also includes a retaining ring 30, which is sleeved on the outside of the retaining block 12. The retaining ring 30 sleeved on the outside of the retaining block 12 forms an additional mechanical constraint and enhances the connection strength between the pole post 20 and the top cover plate 10. The upper surface of the retaining block 12 is provided with a first step portion 121. The lower surface of the retaining ring 30 is provided with a first retaining groove 31 at intervals. Part of the first step portion 121 is embedded in the first retaining groove 31. The first step portion 121 on the upper surface of the retaining block 12 and the first retaining groove 31 on the lower surface of the retaining ring 30 achieve precise positioning and fixation through the engagement of the step and the groove. The locking portion 22 of the pole post 20 is inserted into the pole post hole 11. After the locking portion 22 is mechanically locked with the locking block 12, the retaining ring 30 is fitted onto the locking block 12 from above, so that the first step portion 121 is embedded into the first locking groove 31, forming an axial limit to prevent the pole post 20 from loosening or falling out of the pole post hole 11. The restraining effect of the retaining ring 30 and the locking portion 22 of the pole post 20 form a double lock, further improving the tensile and torsional resistance. In some embodiments, the retaining ring 30 can be made of metal or high-strength plastic material and fixed by pressing, welding or snapping to ensure long-term stability. The cooperation between the ring and the locking block 12 is like adding a "reinforced lock" to the connection between the pole post 20 and the top cover plate 10. Through the engagement of the first step portion 121 and the first locking groove 31, the locking block 12 receives additional support and restraint when fixing the locking portion 22 of the pole post 20. Compared to relying solely on the connection between the locking block 12 and the locking part 22, the addition of the retaining ring 30 allows the terminal post 20 to withstand greater external forces. When the battery encounters severe vibration, impact, or mechanical stress during long-term use, the risk of the terminal post 20 loosening or falling off is significantly reduced, greatly improving the overall connection strength and reliability of the battery top cover assembly. The ring-shaped structure of the retaining ring 30 and its tight fit with the locking block 12 make the entire connection structure more stable. This effectively reduces potential shaking or displacement of the locking block 12 under force, ensuring the positional accuracy of the terminal post 20 within the battery top cover assembly. It avoids problems such as poor electrical contact and increased resistance caused by changes in the position of the terminal post 20, ensuring normal battery performance and extending battery life.

[0041] As a further improvement of this utility model, a welding groove 32 is also provided between two adjacent first slots 31. The welding groove 32 facilitates the alignment and welding of the laser welding head. The welding groove 32 is welded to the top cover plate 10. During welding, the laser beam acts directly on the contact surface between the retaining ring 30 and the top cover plate 10 through the welding groove 32, forming continuous or intermittent weld points, achieving a metallurgical bond between the retaining ring 30 and the top cover plate 10. The welding groove 32 is positioned to avoid the first step 121 of the retaining block 12, ensuring that welding does not affect the mechanical engagement function of the retaining block 12 and the retaining ring 30. The welding of the welding groove 32 to the top cover plate 10 firmly fixes the retaining ring 30 and the top cover plate 10 together, forming a dual fixing mode of interlocking welding. Compared to relying solely on the interlocking connection between the retaining block 12 and the retaining ring 30, the addition of the welding groove 32 further enhances the connection strength between the pole post 20 and the top cover plate 10. Even when the battery is subjected to complex operating conditions, such as frequent vibration and extreme temperature changes, the connection between the terminal post 20 and the top cover plate 10 remains stable, greatly reducing the risk of battery failure due to loose connections and providing a more reliable guarantee for stable battery operation. The welding groove 32 integrates the retaining ring 30 and the top cover plate 10 into a single unit, enhancing the overall structural integrity of the battery top cover assembly. During battery charging and discharging, as current is conducted through the terminal post 20, the stable structure ensures the stability of current conduction, reducing problems such as increased resistance and poor contact caused by structural loosening, ensuring normal battery performance, and improving battery reliability and stability.

[0042] As a further improvement of this utility model, a second slot 13 is provided on the upper surface of the top cover plate 10. The second slot 13 is spaced apart around the periphery of the pole hole 11, and a portion of the first stepped portion 121 is embedded inside the second slot 13. The second slot 13, spaced apart around the periphery of the pole hole 11 on the upper surface of the top cover plate 10, is used to accommodate the first stepped portion 121 of the locking block 12, forming an additional axial limiting structure. During assembly, the first stepped portion 121 of the locking block 12 is partially embedded in the second slot 13, forming a double constraint with the first slot 31 of the retaining ring 30, preventing the pole 20 from axially shifting. The second slot 13 and the first slot 31 together form an upper and lower clamping structure, which firmly fixes the locking block 12 in the vertical direction, avoiding loosening due to vibration or thermal expansion. The engagement of the second slot 13 and the first stepped portion 121 adds a solid defense to the connection between the pole 20 and the top cover plate 10. Compared to a connection method relying solely on the locking block 12 and the retaining ring 30, this structure creates a multi-layered fixing effect, greatly enhancing connection strength. Under extreme conditions such as severe vibration and impact, the terminal post 20 is less likely to loosen or detach, effectively ensuring the stability of the internal electrical connections of the battery, reducing the probability of battery failure due to connection problems, and providing a more solid foundation for the safe and stable operation of the battery. The tightly fitted second locking groove 13 and the first step portion 121 reduce the gaps between the top cover plate 10 and the locking block 12 and retaining ring 30, further optimizing the sealing performance of the battery top cover assembly. External moisture, air, and other impurities are less likely to enter the battery through the connection points, effectively preventing electrolyte leakage and oxidation of the active materials inside the battery, contributing to improved battery safety and lifespan, and reducing the risk of performance degradation, bulging, or even explosion due to sealing failure. The presence of the second locking groove 13 provides a clear positioning reference for the assembly process, allowing assembly personnel to install the locking block 12 and retaining ring 30 into the correct positions more quickly and accurately, reducing debugging and calibration time during assembly. At the same time, this precise fit structure also facilitates large-scale production using automated assembly equipment, improving production efficiency while ensuring product quality consistency and reducing production costs.

[0043] As a further improvement of this utility model, the lower surface of the locking block 12 is provided with a second step portion 122; the locking portion 22 includes a first convex ring 221 and a second convex ring 222 spaced apart, and an annular groove 223 provided between the first convex ring 221 and the second convex ring 222, forming a convex-concave interlocking structure; the second step portion 122 is embedded in the annular groove 223. The locking portion 22 of the pole post 20 consists of the first convex ring 221, the second convex ring 222, and the annular groove 223. During assembly, the second step portion 122 of the locking block 12 is embedded in the annular groove 223 of the locking portion 22. The first convex ring 221 and the second convex ring 222 are located on the upper and lower sides of the locking block 12, respectively, to achieve radial limiting. The first convex ring 221 and the second convex ring 222 prevent the locking block 12 from moving up and down, thereby achieving axial constraint. The engagement of the annular groove 223 and the second step portion 122 prevents the pole post 20 from shifting horizontally or rotating, thereby achieving radial constraint. Compared to ordinary snap-fit ​​connections, this structure significantly increases the contact area and friction between the terminal post 20 and the locking block 12, greatly enhancing the connection strength. Under the stress of strong vibrations, impacts, or long-term use, the terminal post 20 is less likely to detach from the top cover plate 10, effectively ensuring the reliability of the internal electrical connections of the battery and significantly reducing the risk of short circuits, open circuits, and other faults caused by loose connections, providing a solid guarantee for the safe and stable operation of the battery. The shape and positional correspondence between the second step 122 and the annular groove 223 provides assembly personnel with clear installation guidance, enabling quick and accurate assembly of the terminal post 20 and the top cover plate 10, reducing debugging and calibration time during assembly.

[0044] As a further improvement of this utility model, it also includes a lower plastic 40, which has a through hole 41 through which the snap-fit ​​part 22 passes. The lower plastic 40 is disposed between the terminal post seat 21 and the top cover plate 10, and has a through hole 41 in its center for the snap-fit ​​part 22 of the terminal post 20 to pass through, forming an insulating layer. After the snap-fit ​​part 22 passes through the through hole 41 of the lower plastic 40, the upper surface of the lower plastic 40 contacts the top cover plate 10, and the lower surface of the lower plastic 40 contacts the terminal post seat 21, forming an insulating barrier. The lower plastic 40 effectively isolates the terminal post 20 from the top cover plate 10 and other metal components, greatly improving the insulation performance of the battery top cover assembly. It effectively prevents short circuits caused by accidental contact of the battery internal current, reduces the risk of battery failure, and ensures the safety of the battery during use, especially in complex environments such as high temperature and humidity, it can better maintain the stable operation of the battery electrical system. The through hole 41 of the lower plastic 40 assists in fixing the snap-fit ​​portion 22, and works in conjunction with the snap-fit ​​block 12, snap-fit ​​ring 30, and other structures to further enhance the stability of the connection between the terminal post 20 and the top cover plate 10. When the battery is subjected to external forces such as vibration and impact, the lower plastic 40 can share some of the stress, reduce the shaking and displacement of the terminal post 20, ensure the positional accuracy of the terminal post 20 in the assembly, and provide a more reliable guarantee for the stability of the internal electrical connection of the battery. The sealing ring 23 is sleeved on the snap-fit ​​portion 22 of the terminal post 20, located between the lower plastic 40 and the terminal post seat 21, forming an axial compression sealing structure.

[0045] As a further improvement of this utility model, a sealing ring 23 is fitted onto the snap-fit ​​part 22. The upper end face of the sealing ring 23 abuts against the lower plastic 40, and the lower end face of the sealing ring 23 abuts against the terminal seat 21. Under the action of assembly clamping force, the upper end face of the sealing ring 23 abuts against the lower plastic 40, and the lower end face of the sealing ring 23 abuts against the terminal seat 21, causing radial expansion and tightly filling the gap between the snap-fit ​​part 22 and the through hole 41. The sealing ring 23 significantly improves the sealing effect of the battery top cover assembly, forming a reliable sealing barrier that effectively prevents external moisture, dust, corrosive gases, etc., from entering the battery, preventing these substances from chemically reacting with the active materials inside the battery, and avoiding problems such as battery performance degradation and capacity decay. At the same time, it also prevents electrolyte leakage inside the battery, reduces electrolyte corrosion of external battery components, ensures the safe and stable operation of the battery in various complex environments, and reduces battery failures and safety risks caused by sealing failure, such as battery bulging and explosion. Excellent sealing performance effectively protects the stability of the battery's internal chemical system, reduces the loss and deterioration of active materials, and thus extends the battery's lifespan. It also reduces the need for frequent battery maintenance and replacement due to sealing issues, lowering operating costs.

[0046] As a further improvement of this utility model, it also includes an upper plastic 50, which is sleeved on the snap-fit ​​portion 22 and covers the snap-fit ​​block 12 and the snap-fit ​​ring 30. During assembly, the upper plastic 50 is inserted along the snap-fit ​​portion 22, tightly wrapping the outer side of the snap-fit ​​portion 22 and completely covering the snap-fit ​​block 12 and the snap-fit ​​ring 30. The upper plastic 50 fits tightly with each component, forming an integral protective structure, providing a robust protective shell for the battery top cover assembly. It can effectively prevent external moisture, dust, gravel, corrosive gases, and other substances from directly contacting the snap-fit ​​block 12 and the snap-fit ​​ring 30, avoiding corrosion and wear caused by long-term exposure to harsh environments, thereby extending the service life of the snap-fit ​​block 12 and the snap-fit ​​ring 30 and ensuring the stability and reliability of the entire battery top cover assembly connection structure. The insulating properties of the upper plastic 50 further improve the insulation performance of the battery top cover assembly. It forms an insulating barrier between components such as the retaining block 12 and retaining ring 30 and the external environment, effectively preventing external conductive materials from accidentally contacting internal conductive components, reducing the risk of short circuits, and improving battery safety during use. Especially in complex operating environments, such as humid and dusty scenarios, it can better ensure the safe operation of the battery electrical system.

[0047] As a further improvement of this utility model, the top cover plate 10 is also provided with an explosion-proof hole 14 and an injection hole 15, and an explosion-proof valve 141 is installed inside the explosion-proof hole 14. The injection hole 15 on the top cover plate 10 facilitates the injection of electrolyte into the battery during the battery production process, ensuring smooth injection of electrolyte. Through the explosion-proof valve 141 installed inside the explosion-proof hole 14, when the internal pressure of the battery rises sharply due to abnormal conditions such as internal short circuit, overcharge, or over-discharge during battery use, the explosion-proof valve 141 senses the pressure change. When the pressure reaches a preset threshold, the explosion-proof valve 141 automatically opens, releasing the high-temperature and high-pressure gas accumulated inside the battery to the outside through the explosion-proof hole 14, thereby quickly reducing the internal pressure of the battery and preventing serious safety accidents such as battery explosion due to excessive pressure. The combination of the explosion-proof valve 141 and the explosion-proof hole 14 provides a reliable safety protection mechanism for the battery. When the battery experiences abnormal conditions that cause the internal pressure to rise, it can release the pressure in time, effectively preventing serious safety accidents such as battery explosion and fire, and ensuring the safety of personnel and equipment. Whether in large-scale applications such as electric vehicles and energy storage power stations, or in small consumer electronics products, it can greatly reduce the safety risks during battery use.

[0048] This utility model also provides a battery, including a battery casing, a battery cell encapsulated within the battery casing, and the aforementioned battery top cover assembly, wherein the battery top cover assembly encloses the battery cell within the battery casing. The battery casing, battery cell, and battery top cover assembly constitute a complete battery system. The battery casing, as an external protective structure, provides a physical protective barrier for the battery cell and internal components, resisting mechanical damage such as impacts and compressions, while also isolating the battery's internal components from external environmental influences. The battery cell stores and releases electrical energy through internal electrochemical reactions. The battery top cover assembly covers the battery casing, enclosing the battery cell within the casing to form a relatively sealed space. The terminals 20 on the top cover plate 10 are used to achieve electrical connection between the internal and external circuits of the battery. The terminals 20 and the top cover plate 10 are tightly connected by structures such as the locking block 12 and the locking ring 30 to ensure the stability and reliability of the electrical connection. The explosion-proof structure composed of the explosion-proof hole 14 and the explosion-proof valve 141 monitors the internal pressure of the battery in real time. When the internal pressure rises due to abnormal electrochemical reaction of the cell, the explosion-proof valve 141 automatically opens to release pressure and prevent the battery from exploding. The electrolyte injection hole 15 provides a channel for injecting electrolyte into the cell to ensure the normal progress of the cell's electrochemical reaction. When the battery is working, the cell undergoes an electrochemical reaction to generate current. The current is conducted to the external circuit through the terminals 20 to realize the output of electrical energy. During charging, the external current flows into the cell through the terminals 20, enabling the cell to complete the energy storage process. The stable terminal connection structure of the battery top cover assembly ensures the stability of the electrical connection, reduces resistance loss and poor contact problems, and enables the battery to stably output and absorb electrical energy during charging and discharging.

[0049] 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.

[0050] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but 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 utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery top cover assembly, characterized by, include: Top cover plate and pole; The top cover plate is provided with pole hole, and multiple locking blocks are spaced apart inside the pole hole; The pole includes a pole seat and a snap-fit ​​portion protruding upward from the middle of the pole seat. The snap-fit ​​portion is accommodated inside the pole hole and is engaged with the snap block.

2. The battery header assembly of claim 1, wherein, It also includes a retaining ring, which is sleeved on the outside of the retaining block; The upper surface of the card block is provided with a first step; The lower surface of the retaining ring is provided with a first retaining groove at intervals, and a portion of the first stepped portion is embedded inside the first retaining groove.

3. The battery header assembly of claim 2, wherein, A welding groove is also provided between two adjacent first slots, and the welding groove is welded to the top cover plate.

4. The battery top cover assembly according to claim 2, characterized in that: The upper surface of the top cover is provided with a second slot, which is spaced apart along the periphery of the pole hole, and a portion of the first step portion is embedded inside the second slot.

5. The battery header assembly of claim 4, wherein: The lower surface of the card block is provided with a second step; The snap-fit ​​portion includes a first protruding ring, a second protruding ring, and an annular groove disposed between the first protruding ring and the second protruding ring; The second step is embedded inside the annular groove.

6. The battery header assembly of claim 1, wherein: It also includes a lower plastic, which has a through hole, and the snap-fit ​​part passes through the through hole.

7. The battery header assembly of claim 6, wherein: The snap-fit ​​part is fitted with a sealing ring, the upper end face of the sealing ring abuts against the lower plastic, and the lower end face of the sealing ring abuts against the pole seat.

8. The battery header assembly of claim 2, wherein: It also includes an upper plastic, which is sleeved on the snap-fit ​​portion and covers the snap-fit ​​block and the snap-fit ​​ring.

9. The battery cover assembly of claim 1, wherein: The top cover plate is also provided with an explosion-proof hole and a liquid injection hole, and an explosion-proof valve is installed in the explosion-proof hole.

10. A battery, characterized by The battery includes a battery housing, a battery cell encapsulated within the battery housing, and a battery top cover assembly as described in any one of claims 1-9, wherein the battery top cover assembly encloses the battery cell within the battery housing.

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