Battery top cover and battery monomer

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover and a battery monomer, the battery top cover comprises a top cover sheet, a two-dimensional code and a pole hole are arranged on the top cover sheet, the two-dimensional code comprises a plurality of sunken parts, the minimum distance between the sunken part located on the outermost side of the two-dimensional code and the edge of the top cover sheet is a, and the minimum distance between the sunken part located on the outermost side of the two-dimensional code and the edge of the top cover sheet is a. The minimum distance between the sunken part located on the outermost side of the two-dimensional code and the hole wall of the pole hole is b, a is larger than or equal to 1.5 mm, and b is larger than or equal to 1.5 mm, the probability of micro-deformation of the local area, close to the two-dimensional code, of the edge of the top cover piece is reduced, the probability of micro-deformation of the local area, close to the two-dimensional code, of the edge of the pole hole is reduced, and the effect of improving the yield of battery top cover products is achieved.

Description

Technical Field

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

[0002] During the production process of lithium battery top covers, each top cover will be required to have a production information QR code for subsequent information identification and statistics. Each type of top cover will have a separate engraving tool to fix the top cover during engraving.

[0003] At present, there are no specific requirements for the specific position of the QR code on the top cover. When the QR code is close to the edge of the top cover, micro-deformation of the local area of ​​the top cover edge is likely to occur. When the QR code is close to the edge of the pole hole of the top cover, micro-deformation of the local area of ​​the pole hole edge is likely to occur, thereby reducing the product yield of the lithium battery top cover.

[0004] Therefore, it is urgent to propose a battery top cover and a battery cell to solve the above technical problems. Utility Model Content

[0005] The first purpose of the utility model is to provide a battery top cover, which can reduce the probability of micro-deformation of the local area near the QR code at the edge of the top cover sheet, and can also reduce the probability of micro-deformation of the local area near the QR code at the edge of the pole hole, thereby improving the yield rate of the battery top cover product.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The battery top cover comprises a top cover sheet, on which a QR code and a pole hole are provided, the QR code comprises a plurality of recessed portions, the minimum spacing between the recessed portion located at the outermost side of the QR code and the edge of the top cover sheet is a, the minimum spacing between the recessed portion located at the outermost side of the QR code and the hole wall of the pole hole is b, a≥1.5mm, b≥1.5mm.

[0008] Optionally, the QR code and the top cover sheet are integrally stamped and formed.

[0009] Optionally, the QR code is a square, and the shortest side length of the QR code is c, where c≥9mm.

[0010] Optionally, the depth of the recessed portion is L, 0.02 mm≤L≤2 mm.

[0011] Optionally, a liquid injection hole and an explosion-proof valve are further provided on the top cover sheet, and the QR code and the liquid injection hole are respectively located on two opposite sides of the explosion-proof valve.

[0012] Optionally, a liquid injection hole is further provided on the top cover sheet, and the QR code and the liquid injection hole are respectively located on two opposite sides of the pole hole.

[0013] Optionally, a liquid injection hole and an explosion-proof valve are further provided on the top cover sheet, and the pole hole and the explosion-proof valve are both located between the liquid injection hole and the QR code.

[0014] Optionally, the battery top cover also includes a pole and a plastic part, the pole includes a column, the column is inserted into the pole hole, part of the plastic part is filled between the side wall of the column and the hole wall of the pole hole, and part of the plastic part is covered on the surface of the top cover sheet.

[0015] Optionally, a chamfer is provided on an edge of the pole hole facing the plastic part, and part of the plastic part covers the chamfer.

[0016] The second object of the present invention is to provide a battery cell with a higher product yield.

[0017] To achieve this purpose, the utility model adopts the following technical solutions:

[0018] The battery cell comprises a core body, a battery shell and the above-mentioned battery top cover, wherein the core body is arranged in the battery shell, and the top cover sheet is arranged at the opening of the battery shell.

[0019] Beneficial effects of the utility model:

[0020] The battery top cover provided by the utility model has a minimum spacing between a recessed portion located at the outermost side of the two-dimensional code and an edge of the top cover sheet that is greater than or equal to 1.5 mm, and the spacing between the two-dimensional code and the edge of the top cover sheet is widened as much as possible, thereby reducing the probability of micro-deformation of a local area of ​​the edge of the top cover sheet close to the two-dimensional code; at the same time, the minimum spacing between the recessed portion located at the outermost side of the two-dimensional code and the hole wall of the pole hole is greater than or equal to 1.5 mm, and the spacing between the two-dimensional code and the edge of the pole hole is widened as much as possible, thereby reducing the probability of micro-deformation of a local area of ​​the edge of the pole hole close to the two-dimensional code, thereby improving the yield rate of battery top cover products.

[0021] The battery cell provided by the utility model adopts the above-mentioned battery top cover, and the probability of micro-deformation occurring at the edge of the top cover sheet near the QR code is low, and the probability of micro-deformation occurring at the position of the pole hole near the QR code is low, so that the product yield of the battery top cover is high, and a strong guarantee is provided for the use performance and safety performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a battery top cover provided in Example 1;

[0023] Figure 2 This is a partial enlarged structural diagram of the top cover sheet provided in Example 1. Figure 1 ;

[0024] Figure 3 is a schematic diagram of a partial cross-sectional structure of a battery top cover provided in Example 1;

[0025] Figure 4 This is a partial enlarged structural diagram of the top cover sheet provided in Example 1. Figure 2 ;

[0026] Figure 5 is a schematic diagram of the structure of the battery top cover provided in Example 2;

[0027] Figure 6 It is a schematic diagram of the structure of the battery top cover provided in Example 3.

[0028] In the figure:

[0029] 100, top cover; 110, QR code; 120, pole hole; 121, chamfer; 130, injection hole; 140, explosion-proof valve; 200, pole; 210, column; 220, base; 300, plastic part; 400, sealing ring; 410, first sealing section; 420, second sealing section. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Embodiment 1

[0035] This embodiment provides a battery top cover, which can reduce the probability of micro-deformation in the local area of ​​the top cover edge near the QR code, and can also reduce the probability of micro-deformation in the local area of ​​the pole hole edge near the QR code, which has the effect of improving the yield of the battery top cover product.

[0036] Specifically, Figure 1 and Figure 2 As shown, the battery top cover includes a top cover sheet 100, on which a QR code 110 and a pole hole 120 are provided, the QR code 110 includes a plurality of recessed portions (not shown in the figure), the minimum spacing between the outermost recessed portion of the QR code 110 and the edge of the top cover sheet 100 is a, the minimum spacing between the outermost recessed portion of the QR code 110 and the hole wall of the pole hole 120 is b, a≥1.5mm, b≥1.5mm, illustratively, a can be 1.5mm, 2.0mm or 2.5mm, etc., b can be 1.5mm, 2.0mm or 2.5mm, etc., in addition, a and b can be equal or unequal.

[0037] Based on the above design, the minimum spacing between the outermost recessed portion of the two-dimensional code 110 and the edge of the top cover sheet 100 is greater than or equal to 1.5 mm, and the spacing between the two-dimensional code 110 and the edge of the top cover sheet 100 is widened as much as possible to reduce the probability of micro-deformation of the local area of ​​the edge of the top cover sheet 100 close to the two-dimensional code 110; at the same time, the minimum spacing between the outermost recessed portion of the two-dimensional code 110 and the hole wall of the pole hole 120 is greater than or equal to 1.5 mm, and the spacing between the two-dimensional code 110 and the pole hole 120 is widened as much as possible to reduce the probability of micro-deformation of the local area of ​​the edge of the pole hole 120 close to the two-dimensional code 110, which has the effect of improving the yield of battery top cover products.

[0038] The two-dimensional code 110 also includes a plurality of plane parts, a plurality of recessed parts and a plurality of plane parts distributed on the top cover sheet 100 according to a certain rule to record the production information of the battery top cover. It should be pointed out that the distribution method and design of the plurality of recessed parts and the plurality of plane parts on the top cover sheet 100 change with the change of the production information of the battery top cover, and the specific distribution method and design are all prior arts and will not be described here.

[0039] In the prior art, the two-dimensional code 110 on the top cover sheet 100 is usually made by a coding device. When the size of the two-dimensional code 110 changes, it is necessary to manually adjust the position of the top cover sheet 100 fixed on the coding device. This method is prone to inaccurate positioning of the two-dimensional code 110 due to human operation errors and size deviations of the coding device, and thus it is easy to make the spacing between the two-dimensional code 110 and the edge of the top cover sheet 100 less than 1.5mm, or the spacing between the two-dimensional code 110 and the hole wall of the pole hole 120 less than 1.5mm, and then the problem of micro-deformation of the local area of ​​the top cover sheet 100 occurs. To solve this technical problem, in this embodiment, the two-dimensional code 110 and the top cover sheet 100 are integrally stamped, that is, when the top cover sheet 100 is prepared by a stamping process, the two-dimensional code 110 is stamped out together, thereby improving the position accuracy of the two-dimensional code 110 on the top cover sheet 100, ensuring that a and b are both greater than or equal to 1.5mm, so as to further reduce the probability of micro-deformation problems in the local area of ​​the top cover sheet 100.

[0040] It should be noted that the above-mentioned integrated stamping process is a common production process in the art, and will not be described in detail here. In addition, the top cover sheet 100 can be made of common materials in the art such as a plain aluminum sheet.

[0041] Alternatively, if Figure 1 and Figure 2 As shown, the two-dimensional code 110 is a square, and the shortest side length of the two-dimensional code 110 is c, c ≥ 9 mm. For example, c can be 9 mm, 10 mm or 12 mm, etc., to facilitate the stamping of the two-dimensional code 110. In this embodiment, the two-dimensional code 110 is a square structure, that is, the four sides of the two-dimensional code 110 are all c. Of course, in other embodiments, the two-dimensional code 110 can also be a rectangle, in which case the short side of the rectangle can be c.

[0042] In this embodiment, the opening of the recessed portion faces away from the battery shell to prevent the recessed portion of the two-dimensional code 110 from scratching hands or being worn.

[0043] Optionally, the depth of the recessed portion is L, 0.02mm≤L≤2mm, illustratively, L may be 0.02mm, 0.1mm, 1.5mm or 2mm, etc. If L is less than 0.02mm, the recessed portion of the two-dimensional code 110 is too shallow, and it is not easy for the electronic device to recognize the production information recorded in the two-dimensional code 110. If L is greater than 2mm, the recessed portion of the two-dimensional code 110 is too deep, which is easy to reduce the local structural strength of the top cover sheet 100, and it is easy to deform the surface of the top cover sheet 100 facing the battery shell, and then contact and rub with other electrical connection components inside the battery shell.

[0044] Alternatively, if Figure 1 and Figure 2As shown, the top cover sheet 100 is also provided with an injection hole 130 and an explosion-proof valve 140, and the two-dimensional code 110 and the injection hole 130 are respectively located on opposite sides of the explosion-proof valve 140. After the electrolyte is injected into the battery shell through the injection hole 130, it is easy for the electrolyte to remain at the edge of the injection hole 130. If the two-dimensional code 110 and the injection hole 130 are arranged adjacent to each other, the electrolyte remaining at the edge of the injection hole 130 is easy to flow into the recessed part of the two-dimensional code 110, and it is difficult to clean the electrolyte in the recessed part. In this embodiment, the structure in which the two-dimensional code 110 and the injection hole 130 are respectively located on opposite sides of the explosion-proof valve 140 increases the distance between the injection hole 130 and the two-dimensional code 110 as much as possible, thereby reducing the probability of the electrolyte remaining at the edge of the injection hole 130 flowing into the recessed part.

[0045] Alternatively, if Figures 1 to 3 As shown, the battery top cover also includes a pole 200 and a plastic part 300. The pole 200 includes a column 210. The column 210 is inserted into the pole hole 120. Part of the plastic part 300 is filled between the side wall of the column 210 and the hole wall of the pole hole 120. Part of the plastic part 300 is covered on the surface of the top cover sheet 100 to insulate and fix the pole 200 on the top cover sheet 100.

[0046] Furthermore, if Figures 1 to 4 As shown, a chamfer 121 is provided on the edge of the pole hole 120 facing the plastic part 300 , and part of the plastic part 300 is wrapped around the chamfer 121 . The design of the chamfer 121 can prevent the plastic part 300 wrapped around the edge of the pole hole 120 from generating local stress.

[0047] Alternatively, if Figures 1 to 4 As shown, the battery top cover also includes a sealing ring 400, which includes a first sealing segment 410. The first sealing segment 410 is sleeved on the column 210, and the first sealing segment 410 is clamped between the side wall of the column 210 and the hole wall of the pole hole 120 to achieve sealing between the column 210 and the top cover sheet 100.

[0048] Furthermore, if Figures 1 to 4 As shown, the pole 200 further includes a base 220, which is disposed on the side of the top cover sheet 100 away from the plastic part 300. One end of the column 210 is connected to the base 220, and the other end is penetrated by a pole hole 120. The sealing ring 400 further includes a second sealing section 420, which is connected to the first sealing section 410 and is clamped between the base 220 and the top cover sheet 100 to achieve sealing between the base 220 and the top cover sheet 100.

[0049] This embodiment also provides a battery cell with a higher product yield.

[0050] Specifically, the battery cell includes a core, a battery shell and the above-mentioned battery top cover, the core is arranged in the battery shell, and the top cover sheet 100 is arranged at the opening of the battery shell. The battery cell adopts the above-mentioned battery top cover, and the probability of micro-deformation of the edge of the top cover sheet 100 near the QR code 110 is low, and the probability of micro-deformation of the pole hole 120 near the QR code 110 is low, so that the product yield of the battery top cover is high, which provides a strong guarantee for the use performance and safety performance of the battery cell.

[0051] Embodiment 2

[0052] This embodiment provides a battery top cover, which is different from the battery top cover provided in the first embodiment in that:

[0053] like Figure 5 As shown, a liquid injection hole 130 is also provided on the top cover sheet 100, and the two-dimensional code 110 and the liquid injection hole 130 are respectively located on two opposite sides of the pole hole 120, that is, the two-dimensional code 110 and the liquid injection hole 130 are respectively located on two opposite sides of the pole 200, so as to increase the distance between the liquid injection hole 130 and the two-dimensional code 110 as much as possible, thereby reducing the probability of the electrolyte remaining at the edge of the liquid injection hole 130 flowing into the recessed portion.

[0054] The remaining structures of the battery top cover provided in this embodiment are the same as those in the first embodiment and will not be described in detail.

[0055] Embodiment 3

[0056] This embodiment provides a battery top cover, which is different from the battery top cover provided in the first embodiment in that:

[0057] like Figure 6 As shown, a liquid injection hole 130 and an explosion-proof valve 140 are also provided on the top cover sheet 100, and the pole hole 120 and the explosion-proof valve 140 are both located between the liquid injection hole 130 and the two-dimensional code 110, that is, the pole 200 and the explosion-proof valve 140 are both located between the liquid injection hole 130 and the two-dimensional code 110, so as to increase the distance between the liquid injection hole 130 and the two-dimensional code 110 as much as possible, thereby reducing the probability of the electrolyte remaining at the edge of the liquid injection hole 130 flowing into the recessed portion.

[0058] It should be noted that, in this embodiment, the number of poles 200 is two, one of which is a positive pole 200, and the other is a negative pole 200. The pole 200 and the explosion-proof valve 140 are both located between the injection hole 130 and the two-dimensional code 110. The explosion-proof valve 140 and one pole 200 may be both located between the injection hole 130 and the two-dimensional code 110, or the explosion-proof valve 140 and two poles 200 may be both located between the injection hole 130 and the two-dimensional code 110. Figure 6 As shown, the explosion-proof valve 140 and a pole 200 are both located between the injection hole 130 and the two-dimensional code 110 .

[0059] The remaining structures of the battery top cover provided in this embodiment are the same as those in the first embodiment and will not be described in detail.

[0060] 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. Battery top cover, characterized in that, The invention comprises a top cover sheet (100), wherein a two-dimensional code (110) and a pole hole (120) are provided on the top cover sheet (100), wherein the two-dimensional code (110) comprises a plurality of recessed portions, wherein the minimum spacing between the recessed portion located at the outermost side of the two-dimensional code (110) and the edge of the top cover sheet (100) is a, and the minimum spacing between the recessed portion located at the outermost side of the two-dimensional code (110) and the hole wall of the pole hole (120) is b, and a≥1.5 mm and b≥1.5 mm.

2. The battery top cover according to claim 1, characterized in that: The two-dimensional code (110) and the top cover sheet (100) are integrally stamped and formed.

3. The battery top cover according to claim 2, characterized in that: The two-dimensional code (110) is square, and the shortest side length of the two-dimensional code (110) is c, where c≥9 mm.

4. The battery top cover according to claim 2, characterized in that: The depth of the recessed portion is L, 0.02 mm≤L≤2 mm.

5. The battery top cover according to any one of claims 1 to 4, characterized in that: The top cover sheet (100) is also provided with a liquid injection hole (130) and an explosion-proof valve (140), and the two-dimensional code (110) and the liquid injection hole (130) are respectively located on two opposite sides of the explosion-proof valve (140).

6. The battery top cover according to any one of claims 1 to 4, characterized in that: The top cover sheet (100) is also provided with a liquid injection hole (130), and the two-dimensional code (110) and the liquid injection hole (130) are respectively located on two opposite sides of the pole hole (120).

7. The battery top cover according to any one of claims 1 to 4, characterized in that: The top cover sheet (100) is also provided with a liquid injection hole (130) and an explosion-proof valve (140), and the pole hole (120) and the explosion-proof valve (140) are both located between the liquid injection hole (130) and the two-dimensional code (110).

8. The battery top cover according to any one of claims 1 to 4, characterized in that: The battery top cover also includes a pole (200) and a plastic part (300), the pole (200) includes a column (210), the column (210) is inserted into the pole hole (120), part of the plastic part (300) is filled between the side wall of the column (210) and the hole wall of the pole hole (120), and part of the plastic part (300) is covered on the surface of the top cover sheet (100).

9. The battery top cover according to claim 8, characterized in that: A chamfer (121) is provided on the edge of the pole hole (120) facing the plastic part (300), and a portion of the plastic part (300) is covered on the chamfer (121).

10. A battery cell, characterized in that: The battery comprises a core body, a battery shell and a battery top cover as claimed in any one of claims 1 to 9, wherein the core body is arranged in the battery shell, and the top cover sheet (100) is covered at the opening of the battery shell.

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