Battery top cover assembly and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover assembly and a single battery. The battery top cover assembly comprises a top cover part, a pole, a lower plastic part, an upper plastic part and a riveting block, and the pole sequentially penetrates through the lower plastic part, the top cover part, the upper plastic part and the riveting block and is riveted with the riveting block, so that the pole of the battery top cover assembly can be mounted; wherein the riveting block is arranged in the upper plastic part and abuts against the inner wall of the upper plastic part so that the riveting block can be conveniently limited; a plurality of grooves are formed in at least part of the circumferential side wall of the riveting block and used for containing deformation of the riveting block in the riveting process. According to the battery top cover assembly, a space for expansion deformation of the riveting block can be provided, the extrusion force on the upper plastic part when the riveting block is deformed is reduced, and the production yield of the battery top cover assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery top cover assembly and a single battery. Background Art

[0002] In the field of batteries, the battery top cover assembly is a relatively important structure. In existing battery top cover assemblies, the assembly of the pole is usually completed by passing the pole through the lower plastic and the top cover sheet and connecting and fixing it with the upper plastic and the rivet block.

[0003] During pre-assembly of the rivet block and the upper plastic, the upper plastic utilizes its internal space to constrain the outer peripheral movement of the rivet block, enabling assembly and positioning of the rivet block and the upper plastic. During the riveting process of the terminal, the rivet block expands and deforms from the center of the rivet to the surrounding area, causing the rivet block to expand outward in the circumference, squeezing the upper plastic. This can cause cracking at the edges of the upper plastic, increasing the scrap rate during the production of the battery top cover assembly.

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

[0005] One purpose of the present utility model is to provide a battery top cover assembly, which can provide space for the rivet block to expand and deform, reduce the extrusion force on the upper plastic part when the rivet block deforms, and improve the production yield of the battery top cover assembly.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The battery top cover assembly includes a top cover, a pole, a lower plastic part, an upper plastic part and a rivet block, wherein the pole is sequentially passed through the lower plastic part, the top cover, the upper plastic part and the rivet block and is riveted to the rivet block; wherein,

[0008] The riveting block is disposed in the upper plastic component and abuts against the inner wall of the upper plastic component;

[0009] At least a portion of the circumferential side wall of the riveting block is provided with a plurality of grooves, and the grooves are used to accommodate the deformation of the riveting block during the riveting process.

[0010] Optionally, the groove passes through both sides of the riveting block in a vertical direction.

[0011] Optionally, the groove is formed in a portion of the circumferential side wall of the rivet block close to the upper plastic component, so as to form a step portion on the circumferential side wall of the rivet block in a vertical direction.

[0012] Optionally, a dimension of the groove along the vertical direction is not greater than a dimension of the inner wall of the upper plastic part along the vertical direction.

[0013] Optionally, a rounded corner portion is provided at the connection between the groove bottom and the groove wall, and at the connection between the groove and the circumferential side wall.

[0014] Optionally, an annular protrusion is circumferentially provided on the upper plastic part, the rivet block is disposed in the annular protrusion, and a circumferential side wall of the rivet block abuts against the annular protrusion.

[0015] Optionally, the lower plastic part, the top cover part, the upper plastic part and the rivet block are all provided with mounting holes, the poles are sequentially passed through the mounting holes of the lower plastic part, the mounting holes of the top cover part, the mounting holes of the upper plastic part and the mounting holes of the rivet block, and sealing members are provided between the outer periphery of the pole and the mounting hole of the lower plastic part, between the outer periphery of the pole and the mounting hole of the top cover part, and between the outer periphery of the pole and the mounting hole of the upper plastic part.

[0016] Optionally, the riveting block is an annular structure, and a plurality of the grooves are provided, and the plurality of grooves are spaced apart on the outer circumference of the riveting block.

[0017] Optionally, the riveting block is a square structure, and each circumferential side wall of the riveting block is provided with at least one groove.

[0018] Another object of the present invention is to provide a single battery that can provide space for the rivet block to expand and deform, thereby reducing the squeezing force on the upper plastic part when the rivet block deforms, and improving the production yield of the battery top cover assembly.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] A single battery comprises a shell, a battery cell and at least one battery top cover assembly as described in any of the above schemes, wherein the battery cell is arranged in the shell, and the battery top cover assembly is arranged at the opening of the shell.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery top cover assembly and a single battery cell. By providing a groove on the axial side wall of a rivet block, when the battery top cover assembly is riveted and fixed, the rivet block deforms from the center of the rivet block and the terminal toward its periphery due to pressure. The groove absorbs the deformation of the rivet block, preventing the upper plastic part from being squeezed by the deformation of the rivet block and causing cracking, thereby improving the production yield of the battery top cover assembly. Furthermore, the groove is provided on the periphery of the rivet block rather than at a position contacting the terminal, separating the position where the terminal and the rivet block are riveted from the groove that absorbs the deformation, preventing the groove from affecting the connection between the terminal and the rivet block. Furthermore, the groove is provided on at least a portion of the circumferential side wall, ensuring that the axial side wall surface that is still not provided with the groove abuts against the upper plastic part, ensuring the stability of the connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axonometric view of a battery top cover assembly provided by a specific embodiment of the present utility model;

[0024] Figure 2 It is a partial exploded view of a battery top cover assembly provided in a specific embodiment of the present utility model;

[0025] Figure 3 It is a cross-sectional view of a battery top cover assembly provided by a specific embodiment of the present utility model;

[0026] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0027] Figure 5 This is an axonometric view of a circular riveting block provided by one embodiment of the present invention;

[0028] Figure 6 This is an axonometric view of a circular riveting block provided by another embodiment of the present invention;

[0029] Figure 7 This is an axonometric view of a square-structured riveting block provided by one embodiment of the present invention;

[0030] Figure 8 It is an axonometric view of a square-structured riveting block provided by another embodiment of the present invention.

[0031] In the picture:

[0032] 10. Top cover; 20. Pole; 30. Lower plastic part;

[0033] 40. Upper plastic part; 41. Annular protrusion;

[0034] 50. Riveting block; 51. Groove; 52. Rounded corner; 53. Abutting corner;

[0035] 60. Seal; 70. Explosion-proof valve. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0037] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0040] Refer to the following Figures 1 to 8 The battery top cover assembly and the single battery provided by the utility model are described in detail.

[0041] Please refer to Figures 1 to 4Specifically, the battery top cover assembly includes a top cover 10, a terminal 20, a lower plastic part 30, an upper plastic part 40 and a rivet block 50. The terminal 20 is sequentially inserted into the lower plastic part 30, the top cover 10, the upper plastic part 40 and the rivet block 50 and riveted to the rivet block 50, thereby achieving the installation of the terminal 20 of the battery top cover assembly; wherein, the rivet block 50 is arranged in the upper plastic part 40 and abuts against the inner wall of the upper plastic part 40 to facilitate positioning of the rivet block 50; at least a portion of the circumferential side wall of the rivet block 50 is provided with a plurality of grooves 51, which are used to accommodate the deformation of the rivet block 50 during the riveting process.

[0042] In this embodiment, the battery top cover assembly is provided with a groove 51 on the axial sidewall of the rivet block 50. This allows the rivet block 50 to deform from the center of the connection between the rivet block 50 and the terminal 20 toward its periphery due to pressure during riveting. The groove 51 absorbs this deformation, preventing the upper plastic component 40 from being squeezed by the deformation of the rivet block 50 and causing cracking, thereby improving the production yield of the battery top cover assembly. Furthermore, the groove 51 is provided on the periphery of the rivet block 50, rather than at a location that contacts the terminal 20. This separates the location where the terminal 20 and the rivet block 50 are riveted from the deformation-absorbing groove 51, preventing the groove 51 from affecting the connection between the terminal 20 and the rivet block 50. Furthermore, the groove 51 is provided on at least a portion of the circumferential sidewall, ensuring that the axial sidewall surface not provided with the groove 51 abuts against the upper plastic component 40, ensuring a secure connection between the two.

[0043] In this embodiment, the lower plastic part 30, the top cover 10, the upper plastic part 40, and the rivet block 50 are all provided with mounting holes. The pole 20 is sequentially inserted through the mounting holes of the lower plastic part 30, the mounting holes of the top cover 10, the mounting holes of the upper plastic part 40, and the mounting holes of the rivet block 50 and is riveted to the rivet block 50. The mounting holes are provided for the insertion and installation of the pole 20.

[0044] Optionally, a seal 60 is provided between the outer periphery of the pole 20 and the mounting hole of the lower plastic part 30, between the outer periphery of the pole 20 and the mounting hole of the top cover 10, and between the outer periphery of the pole 20 and the mounting hole of the upper plastic part 40 to achieve insulation and sealing of the pole 20, that is, the arrangement of the upper plastic part 40, the seal 60 and the lower plastic part 30, the pole 20 and the top cover 10 are sealed and insulated, so that the pole 20 can only be conductively connected to the rivet block 50 to achieve external connection of the pole 20, thereby ensuring the safety of the battery top cover assembly.

[0045] In some embodiments, the pole 20, the upper plastic part 40, the seal 60, and the rivet block 50 are arranged in groups, and their number can be adaptively changed according to actual needs, that is, it can be one group or two groups to achieve the electrical connection characteristics of the single cell using the battery top cover assembly.

[0046] Furthermore, an annular protrusion 41 is circumferentially provided on the upper plastic part 40, and the rivet block 50 is arranged in the annular protrusion 41, and the circumferential side wall of the rivet block 50 abuts against the annular protrusion 41 to achieve relative limitation between the rivet block 50 and the upper plastic part 40, avoiding safety problems caused by relative movement between the two, and improving the safety of the battery top cover assembly.

[0047] Please refer to Figures 4 to 8 In this embodiment, the rivet block 50 can be an annular or square structure, and the corresponding upper plastic component 40 is also adapted to the shape of the rivet block 50. Since the square structure has a circumferential limit, if the rivet block 50 is a circular structure, a limit structure is also provided between the rivet block 50 and the upper plastic component 40 to limit the relative rotation between the two.

[0048] Please refer to Figure 5 and Figure 6 In some optional embodiments, the rivet block 50 is annular in structure, and a plurality of grooves 51 are provided. The plurality of grooves 51 are spaced apart on the periphery of the rivet block 50 to accommodate the deformation, thereby improving the yield rate of the battery top cover assembly.

[0049] Please refer to Figure 7 and Figure 8 The rivet block 50 is a square structure, and each circumferential side wall of the rivet block 50 is spaced apart with at least one groove 51, which can accommodate the deformation amount and improve the yield rate of the battery top cover assembly.

[0050] Optionally, only one groove 51 may be provided on each circumferential side wall, or multiple grooves 51 may be provided at intervals, both of which can accommodate the deformation of the rivet block 50 and ensure the mutual abutment between the rivet block 50 and the annular protrusion 41.

[0051] Illustratively, the rivet block 50 in this embodiment is a square structure, each circumferential side wall of which is provided with a groove 51 , and abutment corners 53 are formed at the four corners of the rivet block 50 to ensure mutual abutment between the rivet block 50 and the upper plastic part 40 .

[0052] Please refer to Figure 5 and Figure 7In some embodiments, the groove 51 passes through both sides of the rivet block 50 in the vertical direction, that is, the groove 51 is a through groove, which can ensure that a certain amount of deformation of the rivet block 50 itself is provided with a receiving space to absorb the deformation. The upper plastic part 40 is squeezed by the deformation of the rivet block 50 to cause cracking and other problems, thereby improving the production yield of the battery top cover assembly.

[0053] However, during use, the through groove 51 may introduce external debris and other structures, affecting the performance of the battery top cover assembly. Figure 6 and Figure 8 In some other embodiments, the groove 51 is opened in a part of the circumferential side wall of the rivet block 50 close to the upper plastic part 40, so that the circumferential side wall of the rivet block 50 forms a step portion in the vertical direction, so that the circumferential side wall at the top and the side wall of the upper plastic part 40 can simultaneously block the groove 51 to prevent external debris and other structures from entering, thereby improving the reliability of the battery top cover assembly.

[0054] Optionally, the dimension of the groove 51 along the vertical direction is not greater than the dimension of the inner wall of the upper plastic part 40 along the vertical direction. This arrangement can ensure that the groove 51 is covered by the circumferential side wall of the rivet block 50 at the top and the side wall of the upper plastic part 40, further improving the reliability of the battery top cover assembly.

[0055] In some embodiments, a rounded corner 52 is provided at the connection between the bottom of the groove 51 and the groove wall of the groove 51, as well as at the connection between the groove 51 and the circumferential side wall. This arrangement helps to reduce the stress concentration of the rivet block 50, and at the same time makes the deformation of the rivet block 50 more uniform, does not cause cracking or damage to the rivet block 50, and improves the yield rate of the battery top cover assembly.

[0056] In some embodiments, the battery top cover assembly is further provided with an explosion-proof valve 70 for explosion-proof pressure relief of the single battery using the battery top cover assembly.

[0057] This embodiment also provides a single battery cell, comprising a housing, a battery cell, and a battery cover assembly according to any of the above-described embodiments. The battery cell is disposed within the housing, and the battery cover assembly is disposed at an opening in the housing. By providing the battery cover assembly according to this embodiment, the single battery cell not only improves production yield but also accelerates battery cell production without introducing new structures.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Battery top cover assembly, characterized in that, The invention comprises a top cover (10), a pole (20), a lower plastic part (30), an upper plastic part (40) and a riveting block (50), wherein the pole (20) is sequentially passed through the lower plastic part (30), the top cover (10), the upper plastic part (40) and the riveting block (50) and is riveted to the riveting block (50); wherein, The riveting block (50) is arranged in the upper plastic part (40) and abuts against the inner wall of the upper plastic part (40); At least a portion of the circumferential side wall of the riveting block (50) is provided with a plurality of grooves (51), and the grooves (51) are used to accommodate the deformation of the riveting block (50) during the riveting process.

2. The battery top cover assembly according to claim 1, characterized in that: The groove (51) passes through both sides of the riveting block (50) in a vertical direction.

3. The battery top cover assembly according to claim 1, characterized in that: The groove (51) is opened at a portion of the circumferential side wall of the riveting block (50) close to the upper plastic part (40) to form a step portion on the circumferential side wall of the riveting block (50) in the vertical direction.

4. The battery top cover assembly according to claim 3, characterized in that: The dimension of the groove (51) along the vertical direction is not greater than the dimension of the inner wall of the upper plastic part (40) along the vertical direction.

5. The battery top cover assembly according to claim 1, characterized in that: A fillet portion (52) is provided at the connection between the groove bottom (51) and the groove wall (51), and at the connection between the groove (51) and the circumferential side wall.

6. The battery top cover assembly according to claim 1, characterized in that: The upper plastic part (40) is provided with an annular protrusion (41) on its circumferential side, the rivet block (50) is arranged in the annular protrusion (41), and the circumferential side wall of the rivet block (50) abuts against the annular protrusion (41).

7. The battery top cover assembly according to claim 1, characterized in that: The lower plastic part (30), the top cover (10), the upper plastic part (40) and the rivet block (50) are all provided with mounting holes, and the pole (20) is sequentially passed through the mounting hole of the lower plastic part (30), the mounting hole of the top cover (10), the mounting hole of the upper plastic part (40) and the mounting hole of the rivet block (50), and a sealing member (60) is provided between the outer periphery of the pole (20) and the mounting hole of the lower plastic part (30), between the outer periphery of the pole (20) and the mounting hole of the top cover (10), and between the outer periphery of the pole (20) and the mounting hole of the upper plastic part (40).

8. The battery top cover assembly according to any one of claims 1 to 7, characterized in that: The riveting block (50) is an annular structure, and a plurality of the grooves (51) are provided. The plurality of grooves (51) are arranged at intervals on the outer periphery of the riveting block (50).

9. The battery top cover assembly according to any one of claims 1 to 7, characterized in that: The riveting block (50) is a square structure, and each circumferential side wall of the riveting block (50) is provided with at least one groove (51) at intervals.

10. A single cell battery, characterized in that: The battery comprises a shell, a battery cell and at least one battery top cover assembly according to any one of claims 1 to 9, wherein the battery cell is arranged in the shell, and the battery top cover assembly is arranged at the opening of the shell.

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