Battery top cover
By combining inner and outer conical sealing rings with a variable diameter section in the battery top cover design, the problem of insufficient battery sealing performance is solved, and a good sealing effect is achieved under external force conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI LIXIANG BATTERY TECH CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-05
AI Technical Summary
Existing batteries have insufficient sealing performance, especially under conditions of large external force, they are prone to developing gaps, which affects the sealing effect.
The sealing ring, designed with inner and outer conical surfaces of different tapers, combined with the variable diameter section of the substrate and negative electrode post, enhances the fit between the sealing ring and the substrate and post, forming a tighter fit through the sealing of the inner and outer conical surfaces.
This improves the battery's sealing performance, making it less prone to gaps under external forces.
Smart Images
Figure CN224204190U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a battery top cover. Background Technology
[0002] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes, forming a cup, tank, or other container or composite container that generates an electric current. It has a positive and a negative electrode. The main performance parameters of a battery are electromotive force, capacity, specific energy, and resistance. Using batteries as an energy source provides a stable voltage, stable current, long-term stable power supply, and minimal susceptibility to external influences. Batteries are simple in structure, portable, easy to charge and discharge, unaffected by external climate and temperature, and offer stable and reliable performance, playing a significant role in various aspects of modern life.
[0003] In a chemical battery, chemical energy is directly converted into electrical energy through spontaneous oxidation and reduction reactions within the battery. These reactions occur at two electrodes. The negative electrode active material consists of a reducing agent with a relatively negative potential and stable in the electrolyte, such as active metals like zinc, cadmium, and lead, and hydrogen or hydrocarbons. The positive electrode active material consists of an oxidizing agent with a relatively positive potential and stable in the electrolyte, such as metal oxides like manganese dioxide, lead dioxide, and nickel oxide, oxygen or air, halogens and their salts, and oxyacids and their salts. The electrolyte is a material with good ionic conductivity, such as aqueous solutions of acids, bases, and salts, non-aqueous solutions of organic or inorganic substances, molten salts, or solid electrolytes. When the external circuit is open, although there is a potential difference (open-circuit voltage) between the two electrodes, there is no current, and the chemical energy stored in the battery is not converted into electrical energy. When the external circuit is closed, current flows through the external circuit under the influence of the potential difference between the two electrodes.
[0004] In the existing technology, batteries are generally sealed by sealing rings with conventional flat sealing structures to seal the terminals. However, the sealing performance of flat sealing rings is limited. Under the condition of the battery being subjected to large external forces, the sealing rings with flat sealing structures are prone to partial gaps between themselves and the terminals, thereby affecting the sealing performance of the battery. Utility Model Content
[0005] This invention provides a battery top cover that can solve the problem of poor battery sealing performance mentioned in the background art.
[0006] A battery top cover includes: a substrate and a negative electrode post, the negative electrode post penetrating the substrate, and a sealing ring disposed between the substrate and the negative electrode post;
[0007] The substrate has through holes, the through holes have inner conical surfaces, and the negative electrode post has a variable diameter section.
[0008] The sealing ring is provided with a variable diameter section, which is located between the inner conical surface of the hole and the variable diameter portion;
[0009] The variable diameter section is provided with an inner conical surface and an outer conical surface, and the taper of the inner conical surface is smaller than the taper of the outer conical surface.
[0010] Preferably, the negative electrode post is mounted on a chassis, the top of the chassis is connected to a first straight section, the first straight section is connected to the variable diameter section, the variable diameter section is connected to a second straight section, and the second straight section is connected to a riveting section.
[0011] Preferably, the negative electrode post is fitted with an upper plastic sleeve, and a pressure ring is provided at the bottom of the upper plastic sleeve.
[0012] Preferably, a pressure plate is provided on the top of the upper plastic part, and the pressure plate is sleeved on the negative electrode post.
[0013] Preferably, the top of the variable diameter section is connected to the first straight section and the bottom is connected to the second straight section.
[0014] Preferably, the first straight section abuts against the pressure ring.
[0015] Preferably, the bottom of the substrate abuts against a lower plastic layer, and the negative electrode post penetrates through the lower plastic layer.
[0016] Preferably, the lower plastic has a receiving groove.
[0017] Preferably, the sealing ring is disposed within the receiving groove.
[0018] Preferably, a negative electrode current collector is provided between the lower plastic and the chassis, and the negative electrode post passes through the negative electrode current collector.
[0019] The beneficial effects of this utility model are:
[0020] The battery top cover features a sealing ring that provides a seal from both the inner and outer conical surfaces. Compared to conventional flat seals, this effectively improves the fit between the sealing ring and the substrate, as well as between the sealing ring and the negative terminal, thereby enhancing the battery's sealing performance. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of a battery top cover provided by this utility model;
[0022] Figure 2 A cross-sectional view of a battery top cover provided by this utility model;
[0023] Figure 3 An exploded view of a battery top cover provided by this utility model;
[0024] Figure 4 for Figure 2Enlarged view of point A in the middle;
[0025] Figure 5 for Figure 3 Schematic diagram of the structure of the negative electrode post;
[0026] Figure 6 for Figure 3 Schematic diagram of the structure of the middle and lower plastic parts;
[0027] Figure 7 for Figure 3 Cross-sectional view of the middle substrate;
[0028] Figure 8 for Figure 3 Cross-sectional view of the central sealing ring;
[0029] Figure 9 for Figure 3 A bottom view of Zhongshang Plastics.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. Negative current collector; 2. Negative electrode post; 21. Base plate; 22. First straight section; 23. Variable diameter section; 24. Second straight section; 25. Riveting section; 3. Lower plastic; 31. Receiving groove; 4. Sealing ring; 41. First straight section; 42. Variable diameter section; 421. Inner conical surface; 422. Outer conical surface; 43. Second straight section; 5. Base plate; 51. Inner conical surface of hole; 6. Upper plastic; 61. Pressure ring; 7. Pressure plate. Detailed Implementation
[0032] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.
[0033] A battery is a device that converts chemical energy into electrical energy. It contains an electrolyte solution and metal electrodes, forming a cup, tank, or other container or composite container that generates an electric current. It has a positive and a negative electrode. The main performance parameters of a battery are electromotive force, capacity, specific energy, and resistance. Using batteries as an energy source provides a stable voltage, stable current, long-term stable power supply, and minimal susceptibility to external influences. Batteries are simple in structure, portable, easy to charge and discharge, unaffected by external climate and temperature, and offer stable and reliable performance, playing a significant role in various aspects of modern life.
[0034] In the existing technology, batteries are generally sealed by sealing rings with conventional flat sealing structures to seal the terminals. However, the sealing performance of flat sealing rings is limited. Under the condition of the battery being subjected to large external forces, the sealing rings with flat sealing structures are prone to partial gaps between themselves and the terminals, thereby affecting the sealing performance of the battery.
[0035] like Figures 1-4 , Figure 7 As shown, this utility model proposes a battery top cover, including: a substrate 5 and a negative electrode post 2. The substrate 5 has a through hole, and the through hole has an inner conical surface 51. The negative electrode post 2 penetrates the substrate 5 through the through hole, and a sealing ring 4 is also provided between the substrate 5 and the negative electrode post 2.
[0036] Specifically, such as Figures 4-5 As shown, the negative terminal post 2 is provided with a chassis 21. The top of the chassis 21 is connected to a first straight part 22. The first straight part 22 is connected to a variable diameter part 23. The variable diameter part 23 is connected to a second straight part 24. The second straight part 24 is connected to a riveting part 25.
[0037] Furthermore, such as Figure 4 , Figure 9 As shown, the negative electrode post 2 is fitted with an upper plastic 6, and a pressure ring 61 is provided at the bottom of the upper plastic 6. A pressure plate 7 is provided on the top of the upper plastic 6. The pressure plate 7 is fitted onto the negative electrode post 2, and the pressure plate 7 has a hole that matches the riveting part 25 and the second straight part 24 on the top of the negative electrode post 2. This hole is stepped to facilitate the riveting of the pressure plate 7 and the negative electrode post 2.
[0038] like Figure 4 , Figure 8 As shown, the sealing ring 4 has a variable diameter section 42, which is located between the conical surface 51 inside the hole of the substrate 5 and the variable diameter portion 23 of the negative electrode post 2. The top of the variable diameter section 42 is connected to the first straight section 41, and the bottom is connected to the second straight section 43. The first straight section 41 abuts against the pressure ring 61 of the upper plastic 6. Under the downward pressure of the pressure ring 61, the sealing ring 4 deforms and achieves a sealing function.
[0039] The variable diameter section 42 is provided with an inner conical surface 421 and an outer conical surface 422. The inner conical surface 421 of the variable diameter section 42 is in contact with the variable diameter portion 23 of the negative electrode post 2, and the tapers of the two are matched. The outer conical surface 422 of the variable diameter section 42 is in contact with the inner conical surface 51 of the hole in the substrate 5, and the tapers of the two are matched.
[0040] It should be noted that the taper of the inner conical surface 421 is smaller than that of the outer conical surface 422, which makes the substrate 5 fit more tightly with the sealing ring 4 and the negative electrode post 2 when the substrate 5 is pressed down by the upper plastic 6 and the pressure plate 7, and makes it less likely to produce gaps.
[0041] The sealing ring 4 provides sealing from two dimensions: the inner conical surface 421 and the outer conical surface 422. Compared with conventional flat seals, this effectively improves the fit between the sealing ring 4 and the substrate 5, and between the sealing ring 4 and the negative electrode post 2, thereby enhancing the battery's sealing performance. This ensures that the battery is less prone to gaps under conditions of high external force due to the good fit with other components.
[0042] Understandably, when designing the sealing ring 4, it is necessary to calculate the compression amount and then manufacture it by matching the inner conical surface 421 and the outer conical surface 422 with the corresponding taper.
[0043] like Figures 1-4 , Figure 6 As shown, the bottom of the substrate 5 abuts against the lower plastic 3, and a negative electrode current collector 1 is disposed between the lower plastic 3 and the base plate 21. The negative electrode post 2 passes through the lower plastic 3 and the negative electrode current collector 1. The lower plastic 3 also has a receiving groove 31, and a sealing ring 4 is disposed in the receiving groove 31.
[0044] In this embodiment, the negative electrode post 2 passes through the negative electrode current collector 1, the lower plastic 3, the sealing ring 4, the substrate 5, the upper plastic 6, and the pressure plate 7 in sequence, and is assembled by riveting to form an integral structure.
[0045] Working principle: The negative electrode post 2 passes sequentially through the negative electrode current collector 1, lower plastic 3, sealing ring 4, substrate 5, upper plastic 6, and pressure plate 7, and is assembled into a single structure by riveting. The inner conical surface 421 of the variable diameter section 42 fits against the variable diameter part 23 of the negative electrode post 2, and their tapers are matched. The outer conical surface 422 of the variable diameter section 42 fits against the inner conical surface 51 of the hole in the substrate 5, and their tapers are matched. The taper of the inner conical surface 421 is smaller than that of the outer conical surface 422, which makes the substrate 5 and the sealing ring 4, and the sealing ring 4 and the negative electrode post 2 fit more tightly when the substrate 5 is pressed down by the upper plastic 6 and the pressure plate 7, making it less likely for gaps to form. The sealing ring 4 provides sealing from two dimensions: the inner conical surface 421 and the outer conical surface 422. Compared with conventional flat seals, this effectively improves the fit between the sealing ring 4 and the substrate 5, and between the sealing ring 4 and the negative electrode post 2, thereby enhancing the battery's sealing performance. This ensures that the battery is less prone to gaps under conditions of high external force due to the good fit with other components.
[0046] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A battery top cover, characterized in that, include: A substrate (5) and a negative electrode post (2) are provided, wherein the negative electrode post (2) penetrates the substrate (5), and a sealing ring (4) is provided between the substrate (5) and the negative electrode post (2); The substrate (5) has through holes, and the through holes are provided with conical surfaces (51) inside the holes. The negative electrode post (2) is provided with a variable diameter part (23). The sealing ring (4) is provided with a variable diameter section (42), which is located between the inner conical surface (51) of the hole and the variable diameter part (23); The variable diameter section (42) is provided with an inner conical surface (421) and an outer conical surface (422), and the taper of the inner conical surface (421) is smaller than the taper of the outer conical surface (422).
2. A battery top cover as described in claim 1, characterized in that, The negative electrode post (2) is provided with a chassis (21), the top of the chassis (21) is connected to a first straight part (22), the first straight part (22) is connected to the variable diameter part (23), the variable diameter part (23) is connected to a second straight part (24), and the second straight part (24) is connected to a riveting part (25).
3. A battery top cover as described in claim 2, characterized in that, The negative electrode post (2) is fitted with an upper plastic (6), and a pressure ring (61) is provided at the bottom of the upper plastic (6).
4. A battery top cover as described in claim 3, characterized in that, A pressure plate (7) is provided on the top of the upper plastic (6), and the pressure plate (7) is sleeved on the negative electrode post (2).
5. A battery top cover as described in claim 3, characterized in that, The top of the variable diameter section (42) is connected to the first straight section (41), and the bottom is connected to the second straight section (43).
6. A battery top cover as described in claim 5, characterized in that, The first straight section (41) abuts against the pressure ring (61).
7. A battery top cover as described in claim 2, characterized in that, The bottom of the substrate (5) is in contact with the lower plastic (3), and the negative electrode post (2) penetrates the lower plastic (3).
8. A battery top cover as described in claim 7, characterized in that, The lower plastic (3) has a receiving groove (31).
9. A battery top cover as described in claim 8, characterized in that, The sealing ring (4) is disposed in the receiving groove (31).
10. A battery top cover as described in claim 7, characterized in that, A negative electrode current collector (1) is provided between the lower plastic (3) and the chassis (21), and the negative electrode post (2) passes through the negative electrode current collector (1).