Battery cover plate and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly discloses a battery cover plate and a battery, which are characterized in that a first gap is formed between a pole component and a polished aluminum sheet, a second gap is formed between the pole component and an upper plastic part, and a third gap is formed between the pole component and a lower plastic part; the third gap, the first gap, the second gap and the exhaust groove of the upper plastic part are communicated in sequence and jointly form an exhaust channel. The seal assembly seals at least one of the first gap, the second gap, and the third gap. By arranging the exhaust groove, the flow area of the exhaust channel is increased, so that helium can be smoothly diffused from one side of the battery cover plate to the other side of the battery cover plate through the exhaust channel when helium detection is carried out after the battery cover plate is neglected to be provided with a sealing assembly, the air tightness of the battery cover plate can be more intuitively detected, and the accuracy of helium detection is improved; unqualified battery cover plates are prevented from entering the next process, and potential safety hazards are avoided. The utility model also provides a battery and the battery cover plate.

Description

Technical Field

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

[0002] The existing battery cover is composed of: aluminum block, upper plastic part, plain aluminum sheet, pole and lower plastic part. In order to improve the sealing of the battery cover, a sealing ring is added between the upper plastic part and the pole, between the plain aluminum sheet and the pole, and / or between the lower plastic part and the pole. First, the sealing ring can play a good sealing role, isolating the electrolyte inside the battery from the outside world, preventing the electrolyte from overflowing and contaminating the battery cover, and reducing the life. Second, the sealing ring can play a buffering role, which can absorb the pressure during the assembly of components and reduce the deformation of the plain aluminum sheet.

[0003] When assembling the battery cover, there are two methods, manual assembly and automatic assembly. However, when the number of assemblies is too large or the working time is too long, the sealing ring may be missed, resulting in poor helium inspection of the battery cover in the subsequent process, increasing the scrap rate. It is also possible that some defective products are not detected during the helium inspection, resulting in the flow of defective products and continued assembly with the shell, which will cause the corresponding battery to be scrapped. If the battery enters the market, it will threaten the safety of users. Utility Model Content

[0004] The utility model aims to provide a battery cover and a battery, which have an exhaust groove added to the upper plastic part, thereby improving the accuracy of helium detection when the sealing component is leaking, preventing some defective products from flowing out, and avoiding safety hazards.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In one aspect, the utility model provides a battery cover, comprising:

[0007] The plain aluminum sheet is provided with a first through hole;

[0008] An upper plastic part is arranged on one side of the smooth aluminum sheet, the upper plastic part is provided with a second through hole, a side of the upper plastic part away from the smooth aluminum sheet is provided with a receiving groove, and a bottom wall of the receiving groove is provided with an exhaust groove;

[0009] A lower plastic part, arranged on the other side of the smooth aluminum sheet, and the lower plastic part is provided with a third through hole;

[0010] A pole assembly, wherein the pole assembly is sequentially inserted into the third through hole, the first through hole and the second through hole, one end of the pole assembly close to the lower plastic part is connected to the pole ear, and one end of the pole assembly close to the upper plastic part is at least partially embedded in the accommodating groove;

[0011] A first gap is formed between the pole assembly and the inner wall of the first through hole, a second gap is formed between the pole assembly and the inner wall of the second through hole, and a third gap is formed between the pole assembly and the inner wall of the third through hole, and the third gap, the first gap, the second gap and the exhaust groove are sequentially connected and together form an exhaust channel;

[0012] The sealing assembly seals at least one of the first gap, the second gap, and the third gap.

[0013] Optionally, a plurality of the exhaust grooves are provided, and the plurality of exhaust grooves are evenly spaced and arranged in the circumferential direction of the second through hole, and each of the exhaust grooves extends in the radial direction of the second through hole.

[0014] Optionally, four exhaust grooves are provided, and the four exhaust grooves are arranged vertically in pairs in a cross shape.

[0015] Optionally, a first square limiting groove is provided on a side of the smooth aluminum sheet facing the upper plastic part, the cross section of the upper plastic part is also square, and a part of the upper plastic part facing the smooth aluminum sheet is embedded in the first square limiting groove.

[0016] Optionally, the pole assembly comprises a pole, a copper block and an aluminum block which are electrically connected, the copper block and part of the aluminum block are embedded in the receiving groove, and a side of the copper block away from the bare aluminum sheet is connected to the aluminum block;

[0017] The pole includes a first base portion, a connecting portion and a second base portion which are connected to each other, the first base portion is connected to the pole ear, the connecting portion passes through the third through hole, the first through hole and the second through hole in sequence, and the second base portion is connected to a side of the copper block close to the bare aluminum sheet.

[0018] Optionally, a second square limiting groove is provided on a side of the lower plastic part facing the first base portion, the cross-section of the first base portion is square, and a part of the first base portion facing the lower plastic part is embedded in the second square limiting groove.

[0019] Optionally, a first limiting hole is provided on a side of the second base portion facing the copper block, a first limiting column is provided on a side of the copper block facing the second base portion, and the first limiting column is passed through the first limiting hole;

[0020] And / or, a second limiting hole is provided on a side of the copper block facing the aluminum block, a second limiting column is provided on a side of the aluminum block facing the copper block, and the second limiting column is passed through the second limiting hole.

[0021] Optionally, the sealing assembly includes a first sealing ring, wherein the first sealing ring is at least partially located in the first through hole, and at least partially located in the second through hole, and the first sealing ring is used to seal the first gap and the second gap.

[0022] Optionally, at least part of the first sealing ring is located in the third through hole, and the sealing assembly also includes a second sealing ring, which is located in the third through hole, and the lower plastic part and the first sealing ring are respectively pressed on both sides of the second sealing ring along the radial direction of the third through hole, and the first sealing ring is pressed against the pole assembly.

[0023] On the other hand, the utility model provides a battery, comprising the battery cover plate in any of the above solutions.

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

[0025] The utility model provides a battery cover, comprising a plain aluminum sheet, an upper plastic part, a lower plastic part, a pole assembly and a sealing assembly. The upper plastic part and the lower plastic part are respectively arranged on both sides of the plain aluminum sheet. The plain aluminum sheet is provided with a first through hole, the upper plastic part is provided with a second through hole and an exhaust groove, and the lower plastic part is provided with a third through hole. The pole assembly is sequentially penetrated through the third through hole, the first through hole and the second through hole. A first gap is formed between the pole assembly and the inner wall of the first through hole, a second gap is formed between the pole assembly and the inner wall of the second through hole, and a third gap is formed between the pole assembly and the inner wall of the third through hole. The third gap, the first gap, the second gap and the exhaust groove are sequentially connected and together form an exhaust channel. The sealing assembly seals at least one of the first gap, the second gap and the third gap. By setting an exhaust groove on the bottom wall of the receiving groove of the upper plastic part, when the battery cover is subjected to helium inspection after the sealing component is missing, helium can diffuse from one side of the battery cover to the other side through the exhaust channel, and the air tightness of the battery cover can be more intuitively detected, thereby improving the accuracy of the helium inspection, preventing unqualified battery covers from flowing into the next process, and avoiding safety hazards. In addition, the processing process of setting the exhaust groove is simple, and it can be made by a mold during the injection molding of the upper plastic part, and the cost is low.

[0026] The utility model also provides a battery, comprising a shell and the battery cover, wherein the battery cover is welded to the shell. By adopting the battery cover, the problem of missed inspection during helium inspection can be avoided, and some battery covers without sealing components can be avoided from flowing into the next process, so that the battery yield rate is high, and at the same time, the safety performance of the battery after battery assembly is ensured to be high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 is an exploded view of a battery cover provided in an embodiment of the utility model;

[0029] Figure 2 is a top view of a battery cover provided in an embodiment of the utility model;

[0030] Figure 3 yes Figure 2 Sectional view of the AA section;

[0031] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0032] Figure 5 It is a structural schematic diagram of the upper plastic part provided in the embodiment of the utility model;

[0033] Figure 6 is a top view of the upper plastic part provided in the embodiment of the utility model;

[0034] Figure 7 It is a structural schematic diagram of the lower plastic part provided in the embodiment of the utility model.

[0035] In the figure:

[0036] 100, bare aluminum sheet; 101, first through hole; 102, first square limiting groove; 200, upper plastic part; 201, second through hole; 202, accommodating groove; 203, exhaust groove; 300, lower plastic part; 301, third through hole; 302, second square limiting groove; 400, pole assembly; 410, pole; 411, first base part; 412, second base part; 4121, first limiting hole; 413, connecting part; 420, copper block; 421, first limiting column; 4201, second limiting hole; 430, aluminum block; 431, second limiting column; 500, sealing assembly; 510, first sealing ring; 520, second sealing ring. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships 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.

[0041] like Figure 1-Figure 4 As shown, this embodiment provides a battery cover, which includes a plain aluminum sheet 100, an upper plastic part 200, a lower plastic part 300, a pole assembly 400 and a sealing assembly 500.

[0042] The upper plastic part 200 and the lower plastic part 300 are respectively arranged on both sides of the bare aluminum sheet 100, and a receiving groove 202 is provided on the side of the upper plastic part 200 away from the bare aluminum sheet 100, and an exhaust groove 203 is provided on the bottom wall of the receiving groove 202. The bare aluminum sheet 100 is provided with a first through hole 101, the upper plastic part 200 is provided with a second through hole 201, and the lower plastic part 300 is provided with a third through hole 301. The pole assembly 400 is sequentially penetrated through the third through hole 301, the first through hole 101 and the second through hole 201, and one end of the pole assembly 400 close to the lower plastic part 300 is connected to the pole ear, and one end of the pole assembly 400 close to the upper plastic part 200 is at least partially embedded in the receiving groove 202. A first gap is formed between the pole assembly 400 and the inner wall of the first through hole 101, a second gap is formed between the pole assembly 400 and the inner wall of the second through hole 201, and a third gap is formed between the pole assembly 400 and the inner wall of the third through hole 301. The third gap, the first gap, the second gap and the exhaust groove 203 are sequentially connected and together form an exhaust channel. The sealing assembly 500 seals at least one of the first gap, the second gap and the third gap.

[0043] By setting the exhaust groove 203 on the bottom wall of the receiving groove 202 of the upper plastic part 200, the flow area of ​​the exhaust channel is larger. When the battery cover is helium-tested after the sealing component 500 is missing, the helium can diffuse from one side of the battery cover to the other side through the exhaust channel more smoothly, and the air tightness of the battery cover can be more intuitively detected, thereby improving the accuracy of the helium test, preventing unqualified battery covers from flowing into the next process, and avoiding safety hazards. In addition, the processing process of setting the exhaust groove 203 is simple, and it can be made by a mold during the injection molding of the upper plastic part 200, and the cost is low.

[0044] Further, see Figure 5 and Figure 6 In this embodiment, a plurality of exhaust grooves 203 are provided, and the plurality of exhaust grooves 203 are evenly spaced and arranged in the circumference of the second through hole 201, and each exhaust groove 203 extends in the radial direction of the second through hole 201. Exemplarily, the exhaust groove 203 can be made into a straight line. As a result, the flow area of ​​the exhaust channel is large, and it can diffuse to the surroundings of the pole assembly 400. When the battery cover is inspected for helium after the sealing assembly 500 is missing, it is conducive to the smooth passage of helium, thereby further improving the accuracy of the helium inspection, avoiding the outflow of defective products, and ensuring the safety of the battery cover. In addition, during the injection molding process of the upper plastic part 200, the heat during the injection molding of the upper plastic part 200 can also be quickly discharged through the exhaust groove 203, thereby avoiding deformation of the upper plastic part 200, ensuring that the dimensions after injection molding are accurate and the appearance is good, and at the same time, the contamination problem of the injection mold can be reduced.

[0045] As an optional solution, in this embodiment, there are four exhaust slots 203, and the four exhaust slots 203 are vertically arranged in a cross shape. Of course, the above arrangement is only one arrangement scheme. In other embodiments, the number of exhaust slots 203 can also be set to two, six, eight, etc., which are not listed here one by one.

[0046] Continue to see Figure 1 In this embodiment, a first square limiting groove 102 is provided on the side of the light aluminum sheet 100 facing the upper plastic part 200, and the cross section of the upper plastic part 200 is also square, and a part of the side of the upper plastic part 200 facing the light aluminum sheet 100 is embedded in the first square limiting groove 102. Through the cooperation of the first square limiting groove 102 and the upper plastic part 200, the upper plastic part 200 is accurately positioned on the light aluminum sheet 100, the assembly accuracy is high, and the product yield is high. In addition, since the shape of the first square limiting groove 102 is square, the upper plastic part 200 can be prevented from rotating during the assembly process or use, further improving the assembly accuracy.

[0047] Further, see Figure 1 , Figure 3 and Figure 4 , the pole assembly 400 in this embodiment is a composite pole 410, which is conducive to saving material costs. Specifically, the pole assembly 400 includes a pole 410, a copper block 420 and an aluminum block 430 that are conductively connected, wherein the copper block 420 and part of the aluminum block 430 are embedded in the accommodating groove 202, and the side of the copper block 420 away from the bare aluminum sheet 100 is connected to the aluminum block 430. The pole 410 includes a first base portion 411, a connecting portion 413 and a second base portion 412 that are connected to each other, the first base portion 411 is connected to the pole ear, the connecting portion 413 is sequentially arranged through the third through hole 301, the first through hole 101 and the second through hole 201, and the second base portion 412 is connected to the side of the copper block 420 close to the bare aluminum sheet 100. For example, in this embodiment, the second base portion 412 of the pole 410 and the copper block 420, as well as the copper block 420 and the aluminum block 430 can be welded together by penetration welding, which ensures the connection strength while ensuring that the appearance of the bare aluminum sheet 100 is good and not prone to deformation, thereby avoiding the deformation of the bare aluminum sheet 100 when the pole 410 is riveted when the pole 410 is assembled using a riveting block in the prior art.

[0048] See also Figure 1 , Figure 4 and Figure 7In this embodiment, a second square limiting groove 302 is provided on the side of the lower plastic part 300 facing the first base part 411. The cross section of the first base part 411 is square, and the first base part 411 is partially embedded in the second square limiting groove 302 on the side facing the lower plastic part 300. Through the cooperation of the second square limiting groove 302 and the first base part 411, the pole 410 is accurately positioned on the lower plastic part 300, the assembly accuracy is high, and the product yield is high. In addition, since the second square limiting groove 302 is in the shape of a square, the pole 410 can be prevented from rotating during the assembly process or use, further improving the assembly accuracy.

[0049] Further, a first limiting hole 4121 is provided on the side of the second base part 412 facing the copper block 420, and a first limiting column 421 is provided on the side of the copper block 420 facing the second base part 412, and the first limiting column 421 is penetrated in the first limiting hole 4121. Through the cooperation of the above-mentioned first limiting hole 4121 and the first limiting column 421, the accurate positioning between the pole 410 and the copper block 420 is guaranteed, which is conducive to improving the assembly accuracy. Further, a second limiting hole 4201 is provided on the side of the copper block 420 facing the aluminum block 430, and a second limiting column 431 is provided on the side of the aluminum block 430 facing the copper block 420, and the second limiting column 431 is penetrated in the second limiting hole 4201. Through the cooperation of the above-mentioned second limiting hole 4201 and the second limiting column 431, the accurate positioning between the aluminum block 430 and the copper block 420 is guaranteed, which is conducive to improving the assembly accuracy.

[0050] Of course, in some optional implementation schemes, the second limiting hole 4201 and the first limiting hole 4121 are coaxially arranged.

[0051] Continue to see Figure 1 and Figure 4 The sealing assembly 500 in this embodiment includes a first sealing ring 510, and the cross section of the first sealing ring 510 is L-shaped. The first sealing ring 510 is at least partially located in the first through hole 101, and at least partially located in the second through hole 201, so that after the first sealing ring 510 is installed, the first gap can be sealed by the first sealing ring 510, and the seal between the pole assembly 400 and the bare aluminum sheet 100 is good. At the same time, the second gap can be sealed by the first sealing ring 510, and the seal between the pole assembly 400 and the upper plastic part 200 is good. This ensures that no helium flows from one side of the battery cover to the other side through the exhaust channel during helium inspection. At the same time, it can also ensure that there is no leakage of electrolyte and gas when the battery cover is in use.

[0052] Furthermore, the sealing assembly 500 in this embodiment also includes a second sealing ring 520. At least part of the first sealing ring 510 extends into the third through hole 301, the second sealing ring 520 is located on the outside of the first sealing ring 510, and the second sealing ring 520 is also located in the third through hole 301. The two sides of the second sealing ring 520 along the radial direction of the third through hole 301 respectively press the lower plastic part 300 and the first sealing ring 510, and the first sealing ring 510 is pressed against the pole assembly 400. Thus, the third gap is sealed by the cooperation of the first sealing ring 510 and the second sealing ring 520, and the seal between the pole assembly 400 and the lower plastic is good. Therefore, the first gap, the second gap and the third gap are all sealed at the same time by the sealing assembly 500, which improves the reliability of the seal and ensures the safety performance of the battery cover when in use.

[0053] This embodiment also provides a battery, including a shell, and the battery cover plate, the battery cover plate is welded to the shell. By using the battery cover plate in this embodiment, the problem of missed inspection during helium inspection can be avoided, and some battery covers without the sealing assembly 500 can be avoided from flowing into the next process, the battery yield rate is high, and the safety performance of the battery after battery assembly is ensured to be high.

[0054] 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 battery cover, characterized in that: include: A plain aluminum sheet (100) is provided with a first through hole (101); An upper plastic part (200) is arranged on one side of the smooth aluminum sheet (100), the upper plastic part (200) is provided with a second through hole (201), a side of the upper plastic part (200) facing away from the smooth aluminum sheet (100) is provided with a receiving groove (202), and a bottom wall of the receiving groove (202) is provided with an exhaust groove (203); A lower plastic part (300) is arranged on the other side of the smooth aluminum sheet (100), and the lower plastic part (300) is provided with a third through hole (301); A pole assembly (400), wherein the pole assembly (400) is sequentially inserted into the third through hole (301), the first through hole (101) and the second through hole (201), one end of the pole assembly (400) close to the lower plastic part (300) is connected to the pole ear, and one end of the pole assembly (400) close to the upper plastic part (200) is at least partially embedded in the accommodating groove (202); A first gap is formed between the pole assembly (400) and the inner wall of the first through hole (101), a second gap is formed between the pole assembly (400) and the inner wall of the second through hole (201), and a third gap is formed between the pole assembly (400) and the inner wall of the third through hole (301), and the third gap, the first gap, the second gap and the exhaust groove (203) are sequentially connected and together form an exhaust channel; A sealing assembly (500) seals at least one of the first gap, the second gap, and the third gap.

2. The battery cover according to claim 1, characterized in that: A plurality of the exhaust grooves (203) are provided, and the plurality of exhaust grooves (203) are evenly spaced and arranged in the circumferential direction of the second through hole (201), and each exhaust groove (203) extends in the radial direction of the second through hole (201).

3. The battery cover according to claim 2, characterized in that: Four exhaust grooves (203) are provided, and the four exhaust grooves (203) are arranged vertically in pairs in a cross shape.

4. The battery cover according to claim 1, characterized in that: A first square limiting groove (102) is provided on one side of the smooth aluminum sheet (100) facing the upper plastic part (200); the cross section of the upper plastic part (200) is also square; and a portion of the upper plastic part (200) facing the side of the smooth aluminum sheet (100) is embedded in the first square limiting groove (102).

5. The battery cover according to claim 1, characterized in that: The pole assembly (400) comprises a pole (410), a copper block (420) and an aluminum block (430) which are electrically connected, the copper block (420) and part of the aluminum block (430) being embedded in the receiving groove (202), and a side of the copper block (420) away from the bare aluminum sheet (100) being connected to the aluminum block (430); The pole (410) comprises a first base portion (411), a connecting portion (413) and a second base portion (412) which are connected to each other, the first base portion (411) is connected to the pole ear, the connecting portion (413) passes through the third through hole (301), the first through hole (101) and the second through hole (201) in sequence, and the second base portion (412) is connected to a side of the copper block (420) close to the bare aluminum sheet (100).

6. The battery cover according to claim 5, characterized in that: A second square limiting groove (302) is provided on one side of the lower plastic part (300) facing the first base part (411); the cross section of the first base part (411) is square; and a portion of the first base part (411) facing the lower plastic part (300) is embedded in the second square limiting groove (302).

7. The battery cover according to claim 5, characterized in that: A first limiting hole (4121) is provided on a side of the second base portion (412) facing the copper block (420), a first limiting column (421) is provided on a side of the copper block (420) facing the second base portion (412), and the first limiting column (421) is passed through the first limiting hole (4121); And / or, a second limiting hole (4201) is provided on a side of the copper block (420) facing the aluminum block (430), a second limiting column (431) is provided on a side of the aluminum block (430) facing the copper block (420), and the second limiting column (431) is passed through the second limiting hole (4201).

8. The battery cover according to any one of claims 1 to 7, characterized in that: The sealing assembly (500) comprises a first sealing ring (510), wherein the first sealing ring (510) is at least partially located in the first through hole (101), and at least partially located in the second through hole (201), and the first sealing ring (510) is used to seal the first gap and the second gap.

9. The battery cover according to claim 8, characterized in that: At least a portion of the first sealing ring (510) is located in the third through hole (301), and the sealing assembly (500) further comprises a second sealing ring (520), the second sealing ring (520) is located in the third through hole (301), and along the radial direction of the third through hole (301), two sides of the second sealing ring (520) respectively press the lower plastic part (300) and the first sealing ring (510), and the first sealing ring (510) is pressed against the pole assembly (400).

10. A battery, characterized in that: A battery cover comprising the battery cover according to any one of claims 1 to 9.

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