A battery cover plate assembly and a battery

Abstract

This utility model discloses a battery cover assembly and a battery, including a terminal post, a cover plate, an upper insulating member, a lower insulating member, and a terminal array. The terminal post includes a main body, a riveting part, and an abutment platform. The riveting part is located at the upper end of the main body, and the abutment platform is located at the lower end of the main body. The peripheral wall of the main body has an annular groove surrounding the axis of the main body. The main body passes through the cover plate, and the annular groove is located between the cover plate and the riveting part. The lower insulating member is located between the abutment platform and the bottom of the cover plate, and the upper insulating member is located between the top of the cover plate and the riveting part. The terminal array is connected to the bottom of the lower insulating member, and the bottom of the abutment platform abuts against the top of the terminal array. The terminal post passes through the cover plate, and the abutment platform abuts against the bottom of the cover plate through the lower insulating member. The top of the terminal post is riveted to the upper insulating member to form the riveting part. By setting the annular groove, the expansion amount of the upper part of the terminal post under force increases, the expansion amount of the lower part decreases, the deformation of the riveting part increases, the riveting is more secure, and the gap between the lower part of the main body and the cover plate can be maintained.

Description

Technical Field

[0001] This utility model relates to the field of battery-related technology, and in particular to a battery cover assembly and a battery. Background Technology

[0002] Battery covers typically have terminals for electrical connection between the internal battery cells and external circuitry. Currently, the industry commonly uses riveting to install these terminals. In existing technology, the terminal body is subjected to compressive stress during riveting. This stress inevitably causes the cylindrical surface of the terminal to expand, reducing the gap between the terminal and the cover, weakening the battery's internal voltage withstand capability, and posing a safety risk. Furthermore, insufficient deformation of the riveted portion at the top of the terminal can lead to insufficient connection strength between the terminal and the cover. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery cover assembly that can solve the problems of insufficient voltage resistance and insufficient connection strength.

[0004] A battery cover assembly according to a first aspect of the present invention includes: a terminal post, a cover plate, an upper insulating member, a lower insulating member, and a terminal array. The terminal post includes a post body, a riveting part, and an abutment platform. The riveting part is disposed at the upper end of the post body, and the abutment platform is disposed at the lower end of the post body. The peripheral wall of the post body is provided with an annular groove surrounding the axis of the post body. The post body passes through the cover plate, and the annular groove is located between the cover plate and the riveting part. The lower insulating member is disposed between the abutment platform and the bottom of the cover plate. The upper insulating member is disposed between the top of the cover plate and the riveting part. The terminal array is connected to the bottom of the lower insulating member, and the bottom of the abutment platform abuts against the top of the terminal array.

[0005] According to an embodiment of the present invention, a battery cover assembly has at least the following beneficial effects: the terminal post passes through the cover plate, the abutment platform abuts against the bottom of the cover plate through the lower insulating member, and the top of the terminal post is riveted to the upper insulating member to form a riveting part. By setting an annular groove, the stress on the terminal post during riveting can be changed. Since the annular groove is close to the riveting part, the expansion amount of the upper part of the terminal post under force can be increased, and the expansion amount of the lower part can be reduced, thereby increasing the deformation of the riveting part, making the riveting more secure, and the gap between the lower part of the post body and the cover plate can be maintained to maintain sufficient voltage resistance.

[0006] According to some embodiments of this utility model, the cross-section of the annular groove is set to semi-circular.

[0007] According to some embodiments of the present invention, the radius R of the annular groove is 0.5 ± 0.1 mm.

[0008] According to some embodiments of this utility model, the minimum distance between the annular groove and the riveting part is set as H1, and the minimum distance between the annular groove and the abutment platform is set as H2, where H1 / H2 = 0.4-0.65.

[0009] According to some embodiments of the present invention, a cover plate sealing ring is also included, which is disposed between the abutment platform and the cover plate.

[0010] According to some embodiments of the present invention, the cover plate is provided with a first through hole, the column body passes through the first through hole, the cover plate sealing ring includes a first annular portion and a second annular portion, the first annular portion extends radially, the second annular portion extends axially, and the second annular portion is disposed in the inner ring of the first annular portion. The second annular portion abuts against the inner sidewall of the first through hole and the column body, and the first annular portion abuts against the abutting platform and the bottom of the cover plate.

[0011] According to some embodiments of the present invention, a riveting block is further provided between the riveting part and the upper insulating member. The riveting block has a second through hole for the column body to pass through and a riveting groove for the riveting part to be accommodated. The top of the upper insulating member is provided with a receiving groove for the riveting block to be accommodated.

[0012] According to some embodiments of the present invention, the upper insulating member is provided with a third through hole for the column body to pass through, the bottom of the upper insulating member is provided with a plurality of first positioning bosses, the first positioning bosses are arranged around the third through hole, and the top of the cover plate is provided with a first positioning groove for cooperating with the positioning bosses.

[0013] According to some embodiments of the present invention, it also includes an explosion-proof valve and a protective film. The explosion-proof valve is disposed on the cover plate, and the lower insulating member is provided with a pressure relief hole communicating with the explosion-proof valve. The protective film is disposed on the top of the cover plate and covers the top of the explosion-proof valve.

[0014] The battery according to a second aspect of the present invention includes a battery employing the above-described battery cover assembly.

[0015] The battery according to the present invention has at least the following beneficial effects: by adopting the above-mentioned battery cover assembly, the voltage resistance of the battery terminals can be increased to reduce safety risks, and the mechanical strength of the riveted terminals can be increased to increase the battery life.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 for Figure 1 A schematic diagram from another direction; Figure 3 for Figure 1 Exploded view; Figure 4 for Figure 3 A schematic diagram from another direction; Figure 5 for Figure 1 A sectional view.

[0018] Figure label: 100 pole post, 110 post body, 120 riveting part, 130 abutment platform, 140 annular groove; Cover plate 200, first through hole 210, first positioning groove 220, second positioning groove 230; Lower insulating component 300, pressure relief hole 310, second positioning boss 320; Upper insulating component 400, third through hole 410, first positioning boss 420; Extreme displacement 500; Cover sealing ring 600, first annular portion 610, second annular portion 620; Riveting block 700, second through hole 710, riveting groove 720; Explosion-proof valve 810, protective membrane 820. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1 to 5According to a first aspect of the present invention, a battery cover assembly includes a terminal post 100, a cover plate 200, an upper insulating member 400, a lower insulating member 300, and a terminal array 500. The terminal post 100 includes a post body 110, a riveting part 120, and an abutment platform 130. The riveting part 120 is disposed at the upper end of the post body 110, and the abutment platform 130 is disposed at the lower end of the post body 110. The peripheral wall of the post body 110 is provided with an annular groove 140 surrounding the axis of the post body 110. The post body 110 passes through the cover plate 200, and the annular groove 140 is located between the cover plate 200 and the riveting part 120. The lower insulating member 300 is disposed between the abutment platform 130 and the bottom of the cover plate 200. The upper insulating member 400 is disposed between the top of the cover plate 200 and the riveting part 120. The terminal array 500 is connected to the bottom of the lower insulating member 300, and the bottom of the abutment platform 130 abuts against the top of the terminal array 500. The pole post 100 passes through the cover plate 200, and the abutment platform 130 abuts against the bottom of the cover plate 200 through the lower insulating member 300. The top of the pole post 100 is riveted to the upper insulating member 400 to form the riveting part 120. By providing the annular groove 140, the stress on the pole post 100 during riveting can be changed. Since the annular groove 140 is close to the riveting part 120, the amount of expansion of the upper part of the pole post 100 under stress can be increased, and the amount of expansion of the lower part can be reduced. This can increase the deformation of the riveting part 120, making the riveting more secure. In addition, the gap between the lower part of the pole body 110 and the cover plate 200 can be maintained to maintain sufficient voltage withstand capability. Specifically, an upper insulating member 400 can be installed on the top of the cover plate 200, and a lower insulating member 300 can be installed on the bottom. The pole post 100 can be inserted upwards, and the abutment platform 130 abuts against the lower insulating member 300. The top of the pole post 100 is riveted to form a riveting part 120. During riveting, the expansion amount of the upper and lower parts of the pole post 100 can be affected by the annular groove 140. The expansion amount of the pole post 100 located on the upper part of the cover plate 200 increases, while the pole post 100 located below the annular groove 140 remains approximately unchanged. This can increase the deformation of the riveting part 120, increase the riveting strength, and at the same time reduce the gap change between the pole post 100 and the cover plate 200 to maintain sufficient voltage withstand capability, thereby improving service life.

[0023] Reference Figure 5 In some embodiments of this utility model, the cross-section of the annular groove 140 is set as semi-circular. Specifically, the semi-circular annular groove 140 is easy to process, and when the pole post 100 is under stress, the circular groove wall can reduce stress concentration. At the same time, the semi-circular groove has a smaller depth, which can further reduce stress concentration.

[0024] In some embodiments of this utility model, the radius R of the annular groove 140 is 0.5 ± 0.1 mm. Experiments have shown that a radius of 0.5 mm for the annular groove 140 effectively improves the riveting strength, maintains the gap between the pole post 100 and the cover plate 200, and reduces the risk of stress concentration fracture.

[0025] In some embodiments of this utility model, the minimum distance between the annular groove 140 and the riveting part 120 is set to H1, and the minimum distance between the annular groove 140 and the abutment platform 130 is set to H2, where H1 / H2 = 0.4-0.65. The positioning of the annular groove 140, within the above proportions, can simultaneously meet the riveting strength requirements and sufficient voltage withstand capability.

[0026] Reference Figures 3 to 5 In some embodiments of this utility model, a cover plate sealing ring 600 is also included, which is disposed between the abutment platform 130 and the cover plate 200. This seals the interior of the cover plate 200 assembly.

[0027] Reference Figures 3 to 5 In some embodiments of this utility model, the cover plate 200 is provided with a first through hole 210, the column body 110 passes through the first through hole 210, and the cover plate sealing ring 600 includes a first annular portion 610 and a second annular portion 620. The first annular portion 610 extends radially, and the second annular portion 620 extends axially. The second annular portion 620 is disposed within the inner ring of the first annular portion 610. The second annular portion 620 abuts against the inner sidewall of the first through hole 210 and the column body 110, and the first annular portion 610 abuts against the abutment platform 130 and the bottom of the cover plate 200. Specifically, the diameter of the first through hole 210 is larger than the diameter of the column body 110. The first annular portion 610 passes between the sidewall of the first through hole 210 and the sidewall of the column body 110 to position the column body 110 and seal the gap between the column body 110 and the first through hole 210, while also providing insulation.

[0028] Reference Figures 3 to 5 In some embodiments of this utility model, a riveting block 700 is further provided between the riveting part 120 and the upper insulating member 400. The riveting block 700 has a second through hole 710 through which the post body 110 passes, and a riveting groove 720 for the riveting part 120 to accommodate. The top of the upper insulating member 400 is provided with a receiving groove for the riveting block 700 to accommodate. Specifically, the shape of the riveting block 700 matches the shape of the receiving groove. The riveting block 700 can be installed in the receiving groove first, and the pole post 100 can pass through the second through hole 710. The riveting block 700 can be made of metal. When the end of the pole post 100 is riveted, the riveting block 700 can play a supporting role, and after riveting, the riveting block 700 can increase the conductive area of ​​the pole post 100.

[0029] Reference Figures 3 to 5In some embodiments of this utility model, the upper insulating member 400 is provided with a third through hole 410 through which the column body 110 passes. The bottom of the upper insulating member 400 is provided with a plurality of first positioning bosses 420, which surround the third through hole 410. The top of the cover plate 200 is provided with a first positioning groove 220 for engaging with the positioning bosses. Specifically, four first positioning bosses 420 can be provided and arranged in a cross shape around the third through hole 410. Similarly, the cover plate 200 can also be provided with four first positioning grooves 220, which can be arranged around the first through hole 210. The first positioning bosses 420 can be engaged in the first positioning grooves 220 for positioning, facilitating the assembly of the upper insulating member 400.

[0030] Reference Figures 3 to 5 In some embodiments of this utility model, an explosion-proof valve 810 and a protective membrane 820 are also included. The explosion-proof valve 810 is disposed on the cover plate 200, and the lower insulating member 300 is provided with a pressure relief hole 310 communicating with the explosion-proof valve 810. The protective membrane 820 is disposed on the top of the cover plate 200, covering the top of the explosion-proof valve 810. The cover plate 200 is provided with a through hole corresponding to the pressure relief hole 310, and the protective membrane 820 can cover the through hole to protect the explosion-proof valve 810.

[0031] The battery according to a second aspect embodiment of the present invention includes a battery employing the above-described battery cover assembly. By employing the above-described battery cover assembly, the voltage withstand capability of the battery terminals 100 can be increased to reduce safety risks, and the mechanical strength of the riveted terminals 100 can be increased to increase battery life.

[0032] Reference Figures 3 to 4 It should be noted that the bottom of the cover plate 200 is provided with multiple second positioning grooves 230, and the top of the lower insulating member 300 is provided with multiple second positioning bosses 320 for cooperating with the second positioning grooves 230. The second positioning grooves 230 can be set as circular grooves, and the second positioning bosses 320 can be set as cylindrical platforms.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cover assembly, characterized in that, include: The pole post (100) includes a pole body (110), a riveting part (120) and an abutment platform (130). The riveting part (120) is located at the upper end of the pole body (110), and the abutment platform (130) is located at the lower end of the pole body (110). The peripheral wall of the pole body (110) is provided with an annular groove (140) surrounding the axis of the pole body (110). The cover plate (200), the column body (110) passes through the cover plate (200), and the annular groove (140) is located between the cover plate (200) and the riveting part (120); The lower insulating element (300) is disposed between the bottom of the abutment platform (130) and the cover plate (200); An upper insulating member (400) is disposed between the top of the cover plate (200) and the riveting part (120); The electrode row (500) is connected to the bottom of the lower insulating member (300), and the bottom of the abutment platform (130) abuts against the top of the electrode row (500).

2. The battery cover assembly according to claim 1, characterized in that, The cross-section of the annular groove (140) is set as semi-circular.

3. A battery cover assembly according to claim 2, characterized in that, The radius R of the annular groove (140) is 0.5 ± 0.1 mm.

4. A battery cover assembly according to claim 1, characterized in that, The minimum distance between the annular groove (140) and the riveting part (120) is set as H1, and the minimum distance between the annular groove (140) and the abutment platform (130) is set as H2, where H1 / H2 = 0.4-0.

65.

5. A battery cover assembly according to claim 1, characterized in that, It also includes a cover plate sealing ring (600), which is disposed between the abutment platform (130) and the cover plate (200).

6. A battery cover assembly according to claim 5, characterized in that, The cover plate (200) is provided with a first through hole (210), the column body (110) passes through the first through hole (210), the cover plate sealing ring (600) includes a first annular portion (610) and a second annular portion (620), the first annular portion (610) extends radially, the second annular portion (620) extends axially, and the second annular portion (620) is disposed in the inner ring of the first annular portion (610), the second annular portion (620) abuts against the inner sidewall of the first through hole (210) and the column body (110), and the first annular portion (610) abuts against the abutment platform (130) and the bottom of the cover plate (200).

7. A battery cover assembly according to claim 1, characterized in that, It also includes a rivet block (700) disposed between the rivet part (120) and the upper insulating member (400), the rivet block (700) having a second through hole (710) through which the column body (110) passes, and a rivet groove (720) for the rivet part (120) to be accommodated, and the top of the upper insulating member (400) having a receiving groove for the rivet block (700) to be accommodated.

8. A battery cover assembly according to claim 1, characterized in that, The upper insulating member (400) is provided with a third through hole (410) through which the column body (110) passes. The bottom of the upper insulating member (400) is provided with a plurality of first positioning bosses (420), which surround the third through hole (410). The top of the cover plate (200) is provided with a first positioning groove (220) for cooperating with the positioning bosses.

9. A battery cover assembly according to claim 1, characterized in that, It also includes an explosion-proof valve (810) and a protective membrane (820). The explosion-proof valve (810) is located on the cover plate (200), and the lower insulating member (300) is provided with a pressure relief hole (310) communicating with the explosion-proof valve (810). The protective membrane (820) is located on the top of the cover plate (200) and covers the top of the explosion-proof valve (810).

10. A battery, characterized in that, Includes the battery cover assembly according to any one of claims 1-9.

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