Cover plate and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate and a single battery, the cover plate comprises a cover plate body, a first insulating part and a conductive part, the cover plate body is provided with a first mounting groove, the first insulating part is arranged in the first mounting groove, the outer wall of the first insulating part is provided with a first protruding part, and the conductive part is arranged in the first mounting groove. The cover plate body is provided with a first mounting groove, a first protruding part is arranged on the inner wall of the first mounting groove, the first insulating part is provided with a second mounting groove, a second protruding part is arranged on the inner wall of the second mounting groove, the conductive part is arranged in the second mounting groove, and the side wall of the conductive part is attached to or abuts against the second protruding part. The method has the effect of improving the yield of single battery resistors.

Description

Technical Field

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

[0002] Common battery covers usually include a cover body, an upper plastic, a pressure block, a pole and a sealing ring, among which the pressure block is electrically connected to the pole, and the upper plastic is clamped between the cover body and the pressure block. Usually, a small gap is left between the upper plastic and the cover body, and between the upper plastic and the pressure block to facilitate assembly.

[0003] In the related art, single cells need to meet resistance standards. When a single cell is short-circuited, the positive electrode of the single cell can share part of the current, and the battery shell is charged to reduce electrochemical corrosion of the battery shell. Therefore, the resistance value between the above-mentioned pole and the cover body is not easy to be too large.

[0004] However, during the assembly process of the battery cover, due to various reasons such as vibration or sealing ring rebound, the gap between the upper plastic and the cover body, and the gap between the upper plastic and the pressing block will become larger, thereby increasing the resistance between the pressing block and the cover body, and ultimately leading to an increase in the resistance between the pole and the cover body, reducing the resistance yield rate of the single battery.

[0005] Therefore, it is urgent to propose a cover plate and a single cell to solve the above technical problems. Utility Model Content

[0006] The first object of the utility model is to provide a cover plate, which can reduce the probability of increasing the resistance between the conductive member and the cover plate body, and has the effect of improving the resistance yield rate of the single cell.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Cover, including:

[0009] A cover body, wherein the cover body is provided with a first mounting groove;

[0010] A first insulating member, the first insulating member is arranged in the first mounting groove, a first protrusion is arranged on the outer wall of the first insulating member, the first protrusion is fitted or abutted with the inner wall of the first mounting groove, the first insulating member is provided with a second mounting groove, and a second protrusion is arranged on the inner wall of the second mounting groove;

[0011] The conductive member is arranged in the second installation groove, and the side wall of the conductive member is fitted or abutted against the second protrusion.

[0012] Optionally, there are multiple first protrusions, which are evenly distributed along the circumference of the first insulating member; and there are multiple second protrusions, which are evenly distributed along the circumference of the second mounting groove.

[0013] Optionally, the number of the first protrusions and the number of the second protrusions are equal, and each first protrusion is symmetrically arranged with a corresponding second protrusion.

[0014] Optionally, every two adjacent first protrusions are spaced apart, and every two adjacent second protrusions are spaced apart.

[0015] Optionally, the dimension of the first protrusion protruding from the outer wall of the first insulating member is 0.02 mm-0.15 mm, and the dimension of the second protrusion protruding from the inner wall of the second mounting groove is 0.02 mm-0.15 mm.

[0016] Optionally, the cover plate also includes a pole, and the cover plate body is also provided with a first mounting hole, the first mounting hole is located at the bottom of the first mounting groove, the first insulating member is also provided with a second mounting hole, the second mounting hole is located at the bottom of the second mounting groove, the pole is passed through the first mounting hole and the second mounting hole and is connected to the conductive member.

[0017] Optionally, the surface of the pole facing the conductive member is connected to the surface of the conductive member facing the bottom of the second mounting groove, and a third protrusion is provided on one of the pole and the conductive member, and a third mounting hole is provided on the other, and the third protrusion is inserted into the third mounting hole.

[0018] Optionally, the cover plate further includes a second insulating member, the second insulating member covers a side of the cover plate body away from the conductive member, and the pole passes through the second insulating member.

[0019] Optionally, the pole includes a connecting portion and a positioning portion, one end of the connecting portion is connected to the positioning portion, and the other end is connected to the conductive member, a positioning groove is provided on the side of the second insulating member away from the cover body, and the positioning portion is snap-fitted with the positioning groove.

[0020] The second object of the utility model is to provide a single cell battery with a higher resistance yield.

[0021] To achieve this purpose, the utility model adopts the following technical solutions:

[0022] The single battery comprises a battery cell, a battery shell and the above-mentioned cover plate, wherein the battery cell is arranged in the battery shell, and the cover plate body is arranged to cover the opening of the battery shell.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a cover plate, wherein the first insulating member is arranged in the first mounting groove, and the first protrusion on the outer wall of the first insulating member is fitted or abutted against the inner wall of the first mounting groove, the second protrusion is arranged on the inner wall of the second mounting groove, the conductive member is arranged in the second mounting groove, and the side wall of the conductive member is fitted or abutted against the second protrusion, thereby achieving effective contact between the first insulating member and the cover plate body and the conductive member respectively. When the cover plate is affected by external factors such as vibration during assembly or transportation, since the first protrusion protrudes from the outer wall of the first insulating member and the second protrusion protrudes from the inner wall of the second mounting groove, the probability of a gap between the first protrusion and the inner wall of the first mounting groove is low, and the probability of a gap between the second protrusion and the side wall of the conductive member is low, thereby reducing the probability of an increase in resistance between the conductive member and the cover plate body due to external factors, improving the stability of the resistance between the conductive member and the cover plate body, and having the effect of improving the resistance yield rate of the single cell battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the exploded structure of the cover plate provided in the embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the cover body provided by an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of a first insulating member provided in an embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of a cover plate provided by an embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the cover plate provided by the embodiment of the utility model;

[0030] Figure 6 It is a schematic diagram of the structure of the conductive member provided in the embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of the structure of the pole provided by the embodiment of the utility model;

[0032] Figure 8 It is a schematic structural diagram of the second insulating member provided in an embodiment of the utility model.

[0033] In the figure:

[0034] 100, cover body; 110, first mounting groove; 120, first mounting hole; 200, first insulating member; 210, first protrusion; 220, second mounting groove; 221, second protrusion; 230, second mounting hole; 300, conductive member; 310, third protrusion; 400, pole; 410, third mounting hole; 420, connecting portion; 430, positioning portion; 440, weight-reducing groove; 500, second insulating member; 510, positioning groove; 520, convex ridge. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] This embodiment provides a cover plate, which can reduce the probability of increasing the resistance between the conductive member and the cover plate body, and has the effect of improving the resistance yield rate of the single cell.

[0040] Specifically, Figures 1 to 5 As shown, the cover includes a cover body 100, a first insulating member 200 and a conductive member 300, wherein the cover body 100 is provided with a first mounting groove 110, the first insulating member 200 is arranged in the first mounting groove 110, a first protrusion 210 is provided on the outer wall of the first insulating member 200, the first protrusion 210 is fitted or abutted with the inner wall of the first mounting groove 110, the first insulating member 200 is provided with a second mounting groove 220, the inner wall of the second mounting groove 220 is provided with a second protrusion 221, the conductive member 300 is arranged in the second mounting groove 220, and the side wall of the conductive member 300 is fitted or abutted with the second protrusion 221.

[0041] Based on the above design, the first insulating member 200 is arranged in the first mounting groove 110, and the first protrusion 210 on the outer wall of the first insulating member 200 is fitted or abutted against the inner wall of the first mounting groove 110, and the second protrusion 221 is provided on the inner wall of the second mounting groove 220, and the conductive member 300 is arranged in the second mounting groove 220, and the side wall of the conductive member 300 is fitted or abutted against the second protrusion 221, thereby achieving effective contact between the first insulating member 200 and the cover body 100 and the conductive member 300 respectively, when the cover is subjected to external factors such as vibration during assembly or transportation, etc. When the first protrusion 210 protrudes from the outer wall of the first insulating member 200 and the second protrusion 221 protrudes from the inner wall of the second mounting groove 220, the probability of a gap between the first protrusion 210 and the inner wall of the first mounting groove 110 is low, and the probability of a gap between the second protrusion 221 and the side wall of the conductive member 300 is low, thereby reducing the probability of the resistance between the conductive member 300 and the cover body 100 being increased due to external factors, improving the stability of the resistance between the conductive member 300 and the cover body 100, and having the effect of improving the resistance yield rate of the single cell. In addition, the overall structural design is relatively simple, which is conducive to reducing product costs.

[0042] Furthermore, if Figures 1 to 5 As shown, there are multiple first protrusions 210, and the multiple first protrusions 210 are evenly distributed along the circumference of the first insulating member 200. There are multiple second protrusions 221, and the multiple second protrusions 221 are evenly distributed along the circumference of the second mounting groove 220, so that the first insulating member 200 can maintain stable and reliable contact with the cover body 100 and the conductive member 300 respectively in the circumferential direction, further reducing the probability of increased resistance between the conductive member 300 and the cover body 100.

[0043] Furthermore, if Figures 1 to 5As shown, the number of the first protrusions 210 and the second protrusions 221 is equal, and each first protrusion 210 is symmetrically arranged with a corresponding second protrusion 221, that is, the orthographic projection of each first protrusion 210 on the side wall of the first insulating member 200 overlaps with the orthographic projection of a corresponding second protrusion 221 on the side wall of the first insulating member 200. This structural design can improve the structural strength of the side wall of the first insulating member 200 and prevent the side wall of the first insulating member 200 from bending and deformation, thereby providing a strong guarantee for the stability of the distance between the first insulating member 200 and the inner wall of the first mounting groove 110 and the distance between the first insulating member 200 and the conductive member 300, and further reducing the probability of increased resistance between the conductive member 300 and the cover body 100.

[0044] In this embodiment, the number of the first protrusions 210 and the number of the second protrusions 221 are both eight. In other implementation schemes, the number of the first protrusions 210 and the second protrusions 221 may also be six, ten, or other numbers, depending on the volume of the first insulating member 200 .

[0045] Alternatively, if Figures 1 to 5 As shown, the first protrusion 210 is a block structure, and the first protrusion 210 extends from the top of the outer wall of the first insulating member 200 to the bottom of the outer wall of the first insulating member 200, and the second protrusion 221 is a block structure, and the second protrusion 221 extends from the top of the inner wall of the second mounting groove 220 to the bottom of the inner wall of the second mounting groove 220, so that the overall structural consistency of the first insulating member 200 is better, which is convenient for processing, and can also improve the structural strength of the side wall of the first insulating member 200, and prevent the side wall of the first insulating member 200 from bending and deformation.

[0046] Alternatively, if Figures 1 to 5 As shown, every two adjacent first protrusions 210 are spaced apart, and every two adjacent second protrusions 221 are spaced apart, ensuring that a gap is left between the outer wall of the first insulating member 200 and the inner wall of the first mounting groove 110, and a gap is left between the inner wall of the second mounting groove 220 and the outer wall of the conductive member 300, so as to avoid the problem of too small resistance between the cover body 100 and the conductive member 300.

[0047] Alternatively, if Figures 1 to 5As shown, the dimension of the first protrusion 210 protruding from the outer wall of the first insulating member 200 is 0.02mm-0.15mm. Exemplarily, the dimension of the first protrusion 210 protruding from the outer wall of the first insulating member 200 is 0.02mm, 0.05mm, 0.10mm or 0.15mm, etc., and the dimension of the second protrusion 221 protruding from the inner wall of the second mounting groove 220 is 0.02mm-0.15mm. Exemplarily, the dimension of the second protrusion 221 protruding from the inner wall of the second mounting groove 220 is 0.02mm, 0.05mm, 0.10mm or 0.15mm, etc., so that the design of the first protrusion 210 and the second protrusion 221 will not hinder the assembly of the first insulating member 200, the conductive member 300 and the cover body 100.

[0048] Alternatively, if Figures 1 to 5 As shown, the cover plate also includes a pole 400, and the cover plate body 100 is also provided with a first mounting hole 120, and the first mounting hole 120 is located at the bottom of the first mounting groove 110. The first insulating member 200 is also provided with a second mounting hole 230, and the second mounting hole 230 is located at the bottom of the second mounting groove 220. The pole 400 is penetrated through the first mounting hole 120 and the second mounting hole 230 and is connected to the conductive member 300, thereby realizing the electrical connection between the pole 400 and the conductive member 300.

[0049] It should be pointed out that the cover plate usually includes a positive electrode column and a negative electrode column. The positive electrode column corresponds to a positive conductive member and a positive first insulating member, and the negative electrode column corresponds to a negative conductive member and a negative first insulating member. The first insulating member and the conductive member in this embodiment both correspond to the positive electrode column, that is, the above-mentioned column is the positive electrode column of the single cell. Of course, in other implementation schemes, the structures of the above-mentioned conductive member, the first insulating member and the cover plate body can also be applied to the negative electrode column, depending on the actual application requirements.

[0050] Furthermore, if Figures 1 to 7 As shown, the surface of the pole 400 facing the conductive member 300 is connected to the surface of the conductive member 300 facing the bottom of the second mounting groove 220, and a third protrusion 310 is provided on the surface of the pole 400 connected to the conductive member 300, and a third mounting hole 410 is provided on the surface of the conductive member 300 connected to the pole 400, and the third protrusion 310 is inserted into the third mounting hole 410, which can improve the reliability and stability of the connection between the pole 400 and the conductive member 300 on the one hand, and expand the contact area between the pole 400 and the conductive member 300 on the other hand, thereby improving the current carrying capacity. It can be understood that in other embodiments, the third protrusion 310 can also be set on the pole 400, and the third mounting hole 410 can be set on the conductive member 300, according to actual production needs.

[0051] Alternatively, if Figures 1 to 7As shown, the cover plate further includes a second insulating member 500, which covers the side of the cover plate body 100 away from the conductive member 300, and the pole 400 passes through the second insulating member 500 to achieve insulation between the cover plate body 100 and other components in the battery shell of the single battery.

[0052] Furthermore, if Figures 1 to 8 As shown, the pole 400 includes a connecting portion 420 and a positioning portion 430, one end of the connecting portion 420 is connected to the positioning portion 430, and the other end is penetrated by the second insulating member 500, the first mounting hole 120 and the second mounting hole 230 and connected to the conductive member 300, the third mounting hole 410 is opened on the connecting portion 420, and the second insulating member 500 is provided with a positioning groove 510 on the side away from the cover body 100, and the positioning portion 430 is engaged with the positioning groove 510. When the cover is assembled, the pole 400 can be quickly positioned by the positioning groove 510 and the positioning portion 430, which has the effect of improving production efficiency. Furthermore, the positioning groove 510 and the positioning portion 430 are both square structures, which can stop the pole 400 from rotating.

[0053] Furthermore, if Figures 1 to 8 As shown, a plurality of ridges 520 are provided on the side of the second insulating member 500 away from the cover body 100, and the plurality of ridges 520 are connected in sequence. The plurality of ridges 520 cooperate with the surface of the second insulating member 500 away from the cover body 100 to form a positioning groove 510, thereby reducing the thickness of the second insulating member 500 and improving the energy density of the single battery.

[0054] Alternatively, if Figures 1 to 8 As shown, a weight-reducing groove 440 is provided on the side of the connecting portion 420 away from the conductive member 300 to reduce the overall weight of the pole 400 and achieve the effect of improving the energy density of the single battery.

[0055] Optionally, the first insulating member 200 and the second insulating member 500 are both plastic members, the conductive member 300 is an aluminum block, and the cover body 100 is a plain aluminum sheet. Of course, in other embodiments, the first insulating member 200, the second insulating member 500, the conductive member 300 and the cover body 100 can also be made of other materials, which are not listed here one by one.

[0056] This embodiment also provides a single battery, which includes a battery cell, a battery shell and the above-mentioned cover plate. The battery cell is arranged in the battery shell, and the cover plate body 100 is covered at the opening of the battery shell. The single battery adopts the above-mentioned cover plate, so it has a higher resistance yield rate.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A cover plate, characterized in that: include: A cover plate body (100), wherein the cover plate body (100) is provided with a first mounting groove (110); a first insulating member (200), the first insulating member (200) being arranged in the first installation groove (110), a first protruding portion (210) being arranged on an outer wall of the first insulating member (200), the first protruding portion (210) being in contact with or abutting against an inner wall of the first installation groove (110), the first insulating member (200) being provided with a second installation groove (220), and a second protruding portion (221) being arranged on an inner wall of the second installation groove (220); A conductive member (300), wherein the conductive member (300) is arranged in the second installation groove (220), and a side wall of the conductive member (300) is in contact with or abuts against the second protruding portion (221).

2. The cover plate according to claim 1, characterized in that: There are a plurality of first protrusions (210), and the plurality of first protrusions (210) are evenly distributed along the circumference of the first insulating member (200); there are a plurality of second protrusions (221), and the plurality of second protrusions (221) are evenly distributed along the circumference of the second mounting groove (220).

3. The cover plate according to claim 2, characterized in that: The number of the first protrusions (210) and the number of the second protrusions (221) are equal, and each of the first protrusions (210) is symmetrically arranged with a corresponding one of the second protrusions (221).

4. The cover plate according to claim 2, characterized in that: Every two adjacent first protrusions (210) are arranged at an interval, and every two adjacent second protrusions (221) are arranged at an interval.

5. The cover plate according to any one of claims 1 to 4, characterized in that: The dimension of the first protrusion (210) protruding from the outer wall of the first insulating member (200) is 0.02 mm-0.15 mm, and the dimension of the second protrusion (221) protruding from the inner wall of the second mounting groove (220) is 0.02 mm-0.15 mm.

6. The cover plate according to any one of claims 1 to 4, characterized in that: The cover plate further comprises a pole (400), the cover plate body (100) is further provided with a first mounting hole (120), the first mounting hole (120) is located at the bottom of the first mounting groove (110), the first insulating member (200) is further provided with a second mounting hole (230), the second mounting hole (230) is located at the bottom of the second mounting groove (220), the pole (400) is passed through the first mounting hole (120) and the second mounting hole (230) and is connected to the conductive member (300).

7. The cover plate according to claim 6, characterized in that: The surface of the pole (400) facing the conductive member (300) is connected to the surface of the conductive member (300) facing the bottom of the second mounting groove (220), and a third protrusion (310) is provided on one of the pole (400) and the conductive member (300), and a third mounting hole (410) is provided on the other, and the third protrusion (310) is inserted into the third mounting hole (410).

8. The cover plate according to claim 6, characterized in that: The cover plate further comprises a second insulating member (500), the second insulating member (500) covering a side of the cover plate body (100) away from the conductive member (300), and the pole (400) passing through the second insulating member (500).

9. The cover plate according to claim 8, characterized in that: The pole (400) comprises a connecting portion (420) and a positioning portion (430), one end of the connecting portion (420) is connected to the positioning portion (430), and the other end is connected to the conductive member (300), a positioning groove (510) is provided on a side of the second insulating member (500) facing away from the cover plate body (100), and the positioning portion (430) is snap-fitted with the positioning groove (510).

10. A single cell, characterized in that: It comprises a battery cell, a battery shell and the cover plate according to any one of claims 1 to 9, wherein the battery cell is arranged in the battery shell, and the cover plate body (100) is covered at the opening of the battery shell.

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