Battery cover assembly and individual cells

Abstract

This utility model belongs to the field of battery technology and discloses a battery cover assembly and a single battery cell. The battery cover assembly includes a cover body, terminals, an upper plastic part, and a reinforcing ring. The cover body has a terminal hole; the terminal is insulated and sealed through the terminal hole and riveted to the cover body; the terminal includes an outer connecting part; the upper plastic part is disposed between the outer connecting part and the cover body, and the upper plastic part is used to insulate between the outer connecting part and the cover body; the reinforcing ring is embedded in the upper plastic part to improve the crack resistance of the upper plastic part. By embedding the reinforcing ring in the upper plastic part, the structural strength and crack resistance of the battery cover assembly are improved. When the terminal is riveted to the cover body, and the outer connecting part of the terminal squeezes the upper plastic part, the reinforcing ring assists the upper plastic part in resisting the extrusion force, thereby effectively preventing cracking of the upper plastic part and improving the reliability and yield of the battery cover assembly production.

Description

Technical Field

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

[0002] During battery production, one end of the terminal is set on the cover plate body, and the other end of the terminal passes through the cover plate body and connects to the cell. In order to ensure the insulation between the terminal and the cover plate body, the terminal needs to pass through the upper plastic part. At the same time, in order to ensure the relative stability between the terminal and the upper plastic part, the terminal and the cover plate body need to be fixed by welding or riveting, and the upper plastic part is clamped and fixed between the cover plate body and the terminal.

[0003] When riveting the terminals, the terminals apply pressure to the upper plastic parts, causing a certain percentage of the upper plastic parts to crack. This leads to insulation failure of the installed battery, reducing battery reliability and lowering the product yield.

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

[0005] One objective of this invention is to provide a battery cover assembly that can improve the crack resistance of the upper plastic part, prevent the upper plastic part from cracking, and improve the reliability and yield of its production.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Battery cover assembly, including:

[0008] The cover plate body has pole hole;

[0009] An insulating and sealed electrode post is inserted through the electrode post hole and riveted to the cover plate body; the electrode post includes an external connecting part.

[0010] An upper plastic component is disposed between the outer connecting part and the cover plate body, and the upper plastic component is used to insulate the outer connecting part and the cover plate body;

[0011] A reinforcing ring is embedded in the upper plastic part.

[0012] Optionally, the upper plastic part includes a first insulating ring and a second insulating ring. The first insulating ring is disposed between the hole wall of the electrode post hole and the outer peripheral wall of the outer connecting part. The second insulating ring is disposed between the end face of the cover plate body away from the inside of the battery and the outer connecting part. A reinforcing ring is embedded in the first insulating ring and / or the second insulating ring.

[0013] Optionally, the reinforcing ring is embedded in the middle of the first insulating ring along its own thickness direction and / or the middle of the second insulating ring along its own thickness direction.

[0014] Optionally, the first insulating ring has a first hollow portion, and the first hollow portion is provided with the reinforcing ring; and / or the second insulating ring has a second hollow portion, and the second hollow portion is provided with the reinforcing ring.

[0015] Optionally, the reinforcing ring is embedded on the side of the first insulating ring facing the pole post and / or on the side of the second insulating ring facing the pole post.

[0016] Optionally, the first insulating ring has a first annular groove on the side facing the pole post, and the first annular groove is provided with the reinforcing ring; and / or the second insulating ring has a second annular groove on the side facing the pole post, and the second annular groove is provided with the reinforcing ring.

[0017] Optionally, the reinforcing ring protrudes from the side of the first insulating ring facing the pole post and / or the side of the second insulating ring facing the pole post, forming an abutting portion that abuts against the pole post.

[0018] Optionally, the reinforcing ring and the upper plastic part are bonded together.

[0019] Optionally, it further includes a lower plastic component disposed on the end face of the cover body facing the inside of the battery; and / or,

[0020] It also includes a sealing element disposed between the hole wall of the pole post and the outer peripheral wall of the pole post.

[0021] One objective of this invention is to provide a single-cell battery that can improve the crack resistance of the upper plastic part, prevent the upper plastic part from cracking, and improve the reliability and yield of its production.

[0022] To achieve this objective, the present invention adopts the following technical solution:

[0023] A single battery cell, including the battery cover assembly described in any of the above embodiments.

[0024] The beneficial effects of this utility model are:

[0025] This utility model provides a battery cover assembly and a single battery cell. By embedding a reinforcing ring inside the upper plastic part, the structural strength and crack resistance of the battery cover assembly are improved. When the terminal post is riveted to the cover body, the reinforcing ring assists the upper plastic part in resisting the extrusion force when the outer connecting part of the terminal post squeezes the upper plastic part, thereby effectively preventing the upper plastic part from cracking and improving the reliability and yield of the battery cover assembly production. Attached Figure Description

[0026] Figure 1 This is a top view of the battery cover assembly provided in a specific embodiment of this utility model;

[0027] Figure 2 This is a partial cross-sectional view of the battery cover assembly provided in the first optional embodiment of this utility model;

[0028] Figure 3 This is a partial cross-sectional view of the battery cover assembly provided in the second optional embodiment of the present invention;

[0029] Figure 4 This is a partial cross-sectional view of the battery cover assembly provided in the third optional embodiment of this utility model.

[0030] In the picture:

[0031] 10. Cover plate body; 11. Pole post hole;

[0032] 20. Pole post; 21. External connecting part; 22. Internal connecting part;

[0033] 30. Upper plastic part; 31. First insulating ring; 32. Second insulating ring;

[0034] 40. Reinforcing ring; 50. Lower plastic part; 60. Sealing part. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] The following reference Figures 1 to 4 This invention introduces the battery cover assembly and individual battery cells provided by this utility model.

[0040] This embodiment provides a battery cover assembly that can improve the crack resistance of the upper plastic part 30, prevent the upper plastic part 30 from cracking, and improve its production reliability and yield.

[0041] Please refer to Figure 1 and Figure 2 Specifically, the battery cover assembly includes a cover body 10, a terminal post 20, and an upper plastic component 30. The cover body 10 has a terminal post hole 11; the terminal post 20 is insulated and sealed through the terminal post hole 11 and riveted to the cover body 10; the terminal post 20 includes an external connecting portion 21; the upper plastic component 30 is disposed between the external connecting portion 21 and the cover body 10, and the upper plastic component 30 is used to insulate the external connecting portion 21 and the cover body 10.

[0042] Furthermore, the battery cover assembly also includes a reinforcing ring 40, which is embedded in the upper plastic part 30 to improve the crack resistance of the upper plastic part 30.

[0043] In this embodiment, the battery cover assembly improves its structural strength and crack resistance by embedding a reinforcing ring 40 inside the upper plastic part 30. When the pole post 20 is riveted to the cover body 10, the reinforcing ring 40 assists the upper plastic part 30 in resisting the extrusion force when the outer connecting part 21 of the pole post 20 presses against the upper plastic part 30, thereby effectively preventing the upper plastic part 30 from cracking and improving the reliability and yield of the battery cover assembly production.

[0044] Optionally, the number of the aforementioned terminal hole 11 and terminal 20 can be set to one, two or more according to the configuration requirements of a single cell, and the corresponding upper plastic part 30 and reinforcing ring 40 can also be set to one, two or more, without specific limitation here.

[0045] Please refer to Figure 2 and Figure 3 Specifically, the upper plastic part 30 includes a first insulating ring 31 and a second insulating ring 32. The first insulating ring 31 is disposed between the hole wall of the terminal hole 11 and the outer peripheral wall of the outer connecting part 21. The second insulating ring 32 is disposed between the end face of the cover plate body 10 facing away from the inside of the battery and the outer connecting part 21. A reinforcing ring 40 is embedded in the first insulating ring 31 and / or the second insulating ring 32. That is, the reinforcing ring 40 can be provided on all surfaces of the upper plastic part 30 that contact the cover plate body 10, or only on one surface, both of which can improve the crack resistance of the upper plastic part 30.

[0046] Please refer to Figure 4 In an optional embodiment, the reinforcing ring 40 is embedded in the middle of the first insulating ring 31 along its own thickness direction and / or the middle of the second insulating ring 32 along its own thickness direction, thereby enhancing the crack resistance of the first insulating ring 31 and / or the second insulating ring 32.

[0047] Specifically, the first insulating ring 31 has a first hollow portion, and the first hollow portion is provided with a reinforcing ring 40; and / or the second insulating ring 32 has a second hollow portion, and the second hollow portion is provided with a reinforcing ring 40, thereby enabling the upper plastic part 30 to be embedded in the reinforcing ring 40.

[0048] Please refer to Figure 2 and Figure 3 In another optional embodiment, the reinforcing ring 40 is embedded in the side of the first insulating ring 31 facing the pole post 20 and / or the side of the second insulating ring 32 facing the pole post 20, that is, the reinforcing ring 40 can directly contact the pole post 20, which can better achieve the protection of the upper plastic part 30 by the reinforcing ring 40.

[0049] Specifically, the first insulating ring 31 has a first annular groove on the side facing the pole post 20, and the first annular groove is provided with a reinforcing ring 40; and / or the second insulating ring 32 has a second annular groove on the side facing the pole post 20, and the second annular groove is provided with a reinforcing ring 40, so that the upper plastic part 30 can be embedded in the reinforcing ring 40.

[0050] Optionally, the reinforcing ring 40 protrudes from the side of the first insulating ring 31 facing the pole post 20 and / or the side of the second insulating ring 32 facing the pole post 20, forming an abutting portion that abuts against the pole post 20. This arrangement ensures that the compressive force during riveting of the pole post 20 acts directly on the reinforcing ring 40, thereby further reducing damage to the upper plastic part 30.

[0051] Optionally, the reinforcing ring 40 and the upper plastic part 30 can be molded together by overmolding, thus achieving the molding of the reinforcing ring 40 and the upper plastic part 30. Of course, in other embodiments, the reinforcing ring 40 and the upper plastic part 30 can also be molded together in other ways, which are not specifically limited here.

[0052] Optionally, the reinforcing ring 40 can be made of metal or high-strength non-metallic material to meet the high strength requirements of the reinforcing ring 40 and improve the crack resistance of the upper plastic part 30. For example, in this embodiment, the reinforcing ring 40 is a stainless steel ring, which meets the structural strength requirements and facilitates bearing the compressive force during the riveting of the pole post 20.

[0053] Please refer to Figure 1 and Figure 2 Furthermore, the battery cover assembly also includes a lower plastic part 50, which is disposed on the end face of the cover body 10 facing the inside of the battery. This can achieve insulation between the cover body 10 and the inside of the battery, and also achieve insulation between the inner connection part 22 of the terminal post 20 and the cover body 10.

[0054] Furthermore, the battery cover assembly also includes a sealing element 60, which is disposed between the hole wall of the terminal post hole 11 and the outer peripheral wall of the terminal post 20, so as to achieve a sealing effect when the terminal post 20 passes through the terminal post hole 11, and ensure the sealing performance of the battery cover assembly after it is installed on the single cell.

[0055] This embodiment also provides a single battery cell, which includes the battery cover assembly described in any of the above-described solutions. Specifically, the single battery cell can be a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single battery cell can also be a primary lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which will not be elaborated further here. This single battery cell has the beneficial effects of the battery cover assembly described in any of the above-described solutions, which will not be elaborated further here.

[0056] Specifically, by adopting the aforementioned battery cover assembly, the reliability and yield of this single battery cell are improved, thereby reducing production costs.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cover assembly, characterized in that, include: The cover plate body (10) has an pole post hole (11); The pole post (20) is insulated and sealed through the pole post hole (11) and riveted to the cover plate body (10); the pole post (20) includes an external connecting part (21); An upper plastic part (30) is disposed between the outer connecting part (21) and the cover plate body (10), and the upper plastic part (30) is used to insulate the outer connecting part (21) and the cover plate body (10); A reinforcing ring (40) is embedded in the upper plastic part (30).

2. The battery cover assembly according to claim 1, characterized in that, The upper plastic part (30) includes a first insulating ring (31) and a second insulating ring (32). The first insulating ring (31) is disposed between the hole wall of the pole hole (11) and the outer peripheral wall of the outer connecting part (21). The second insulating ring (32) is disposed between the end face of the cover plate body (10) away from the inside of the battery and the outer connecting part (21). The first insulating ring (31) and / or the second insulating ring (32) are embedded with a reinforcing ring (40).

3. The battery cover assembly according to claim 2, characterized in that, The reinforcing ring (40) is embedded in the middle of the first insulating ring (31) along its own thickness direction and / or the middle of the second insulating ring (32) along its own thickness direction.

4. The battery cover assembly according to claim 3, characterized in that, The first insulating ring (31) has a first hollow portion, and the first hollow portion is provided with the reinforcing ring (40); and / or the second insulating ring (32) has a second hollow portion, and the second hollow portion is provided with the reinforcing ring (40).

5. The battery cover assembly according to claim 2, characterized in that, The reinforcing ring (40) is embedded on the side of the first insulating ring (31) facing the pole post (20) and / or on the side of the second insulating ring (32) facing the pole post (20).

6. The battery cover assembly according to claim 5, characterized in that, The first insulating ring (31) has a first annular groove on the side facing the pole post (20), and the first annular groove is provided with the reinforcing ring (40); and / or the second insulating ring (32) has a second annular groove on the side facing the pole post (20), and the second annular groove is provided with the reinforcing ring (40).

7. The battery cover assembly according to claim 5, characterized in that, The reinforcing ring (40) protrudes from the side of the first insulating ring (31) facing the pole post (20) and / or the side of the second insulating ring (32) facing the pole post (20), forming an abutting portion that abuts against the pole post (20).

8. The battery cover assembly according to any one of claims 1-7, characterized in that, The reinforcing ring (40) and the upper plastic part (30) are bonded together.

9. The battery cover assembly according to claim 1, characterized in that, It also includes a lower plastic component (50) disposed on the end face of the cover body (10) facing the inside of the battery; and / or, It also includes a sealing element (60), which is disposed between the hole wall of the pole hole (11) and the outer peripheral wall of the pole (20).

10. A single-cell battery, characterized in that, Includes the battery cover assembly as described in any one of claims 1-9.

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