Battery cover plate and single battery
By simplifying the battery cover structure and using a fixed connection between the insulator and the cover body and the pole column, the complex problem of the existing battery cover structure is solved, and the effect of reducing production costs and increasing energy density is achieved.
Patent Information
- Application Number
- CN202421442890.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-24
AI Technical Summary
The existing battery cover has a complex structure and complex manufacturing process, which leads to an increase in material costs and processing process costs, and occupies the inner and outer space of lithium-ion batteries, resulting in a decrease in the energy density of lithium-ion batteries.
A simplified battery cover structure is adopted, including a cover body, an insulating member and a pole pillar. The connecting part of the insulating member is fixed to the outer peripheral edge of the mounting hole of the cover body. The pole pillar is sandwiched between the first part and the second part of the insulating member to achieve a fixed connection between the pole pillar and the insulating member, and the insulating part of the insulating member is realized.
The structure of the battery cover plate is simplified, manufacturing difficulty and production cost are reduced, production quality and production efficiency are improved, and the height and space of the battery are reduced, thereby improving the monomer energy density of lithium-ion batteries.
Smart Images
Figure CN222763067U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery cover and a single battery. Background Art
[0002] The existing battery top cover structure is usually a riveted structure. Generally, the pole is assembled with the top cover aluminum sheet, sealing ring, plastic parts, etc. before welding or injection molding. The pole is usually a cylinder. In order to prevent the pole from rotating relative to the aluminum sheet and causing poor sealing, an anti-twist structure needs to be designed. A sealing ring is provided between the pole and the aluminum sheet to isolate the internal system of the battery from the external environment of the battery. The plastic part fixes the pole and insulates the pole from the aluminum sheet to prevent short circuit and enhance the safety of lithium-ion batteries.
[0003] The existing battery top cover has a complex structure and requires a complex manufacturing process. In order to prevent the sealing ring from loosening and causing poor sealing, it is necessary to design a riveting structure to prevent the pole from moving longitudinally, and an anti-twist structure is also required to prevent the pole and the upper plastic from rotating, which increases the material cost and processing cost, and occupies too much internal and external space of the lithium-ion battery, resulting in a decrease in the energy density of the lithium-ion battery cell.
[0004] Therefore, there is an urgent need to provide a new type of battery cover and single battery to solve the above technical problems in the prior art. Utility Model Content
[0005] The utility model aims to provide a battery cover plate, which can simplify the structure of the battery cover plate, reduce the manufacturing difficulty and production cost, and thus improve the production quality and production efficiency.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The battery cover includes a cover body, an insulating member and a pole, wherein the cover body is provided with a mounting hole; the insulating member includes a connecting portion, an insulating portion and a fixing portion which are sequentially connected from the outside to the inside, wherein at least a portion of the connecting portion is fixed to the outer peripheral edge of the mounting hole, and the fixing portion is arranged to form a connecting hole, wherein the fixing portion includes a first portion and a second portion, wherein the first portion and the second portion are respectively connected to the upper and lower ends of the insulating portion; the pole is arranged in the connecting hole, wherein at least a portion of the pole is clamped between the first portion and the second portion, and the insulating member is clamped between the circumferential outer wall of the pole and the circumferential inner wall of the mounting hole.
[0008] Optionally, the pole is provided with a plurality of fixing holes spaced apart along the circumferential direction, the first part and / or the second part is provided with a plurality of fixing posts, and the fixing posts are inserted into the fixing holes one by one.
[0009] Optionally, the insulating member is integrally formed by injection molding, and one end of the fixing column is connected to the first part, and the other end is connected to the second part.
[0010] Optionally, a mounting step is recessed at the junction of the hole wall of the mounting hole and the top wall of the cover body and / or at the junction of the hole wall of the mounting hole and the bottom wall of the cover body, the connecting portion is cooperatively mounted on the mounting step, and the top wall of the insulating member is not higher than the top wall of the cover body.
[0011] Optionally, the top wall of the cover body and the bottom wall of the cover body are both recessed with installation steps, and the connecting part includes a third part and a fourth part, the third part is cooperated and installed on the installation step located above, and the fourth part is cooperated and installed on the installation step located below.
[0012] Optionally, the third portion and the fourth portion are each provided with a plurality of limiting columns spaced apart along the circumferential direction, and the upper installation step and the lower installation step are each correspondingly provided with a plurality of limiting grooves.
[0013] Optionally, the limiting column provided on the third part and the limiting column provided on the fourth part are staggered.
[0014] Optionally, the limit groove provided on the upper installation step and the limit groove provided on the lower installation step are coaxial and interconnected one by one, the insulating part is injection molded as one piece, and the limit column provided on the third part and the limit column provided on the fourth part are connected one by one as one.
[0015] Optionally, the cover plate body is further provided with an explosion-proof hole, and an explosion-proof plate is installed in cooperation with the explosion-proof hole.
[0016] Another object of the present invention is to provide a single cell battery, which includes a battery cover as described in any of the above solutions.
[0017] Beneficial effects:
[0018] The battery cover in the utility model is provided with a mounting hole on the cover body, and the connecting part of the insulating member is fixed to the outer peripheral edge of the mounting hole to realize the connection between the insulating member and the cover body. The fixing part of the insulating member includes a first part and a second part respectively connected to the upper and lower ends of the insulating member, and at least part of the pole is sandwiched between the first part and the second part to realize the fixed connection between the pole and the insulating member, and the insulating part of the insulating member is sandwiched between the circumferential outer wall of the pole and the circumferential inner wall of the mounting hole to realize the insulation between the pole and the cover body. The battery cover has a simple structure, and only includes the cover body, the pole and the insulating member, which can simplify the structure of the battery cover, reduce the manufacturing difficulty and production cost, and thus improve the production quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is an exploded view of some components of the battery cover provided by the specific implementation mode of the utility model;
[0020] Figure 2 It is a longitudinal cross-sectional view of a pole of a battery cover provided by a specific embodiment of the utility model.
[0021] In the figure:
[0022] 100, cover plate body; 110, mounting hole; 111, mounting step; 112, limit groove; 120, injection hole; 130, explosion-proof hole; 131, explosion-proof plate;
[0023] 200, insulating member; 201, connecting hole; 211, third part; 212, fourth part; 213, limiting column; 220, insulating part; 231, first part; 232, second part; 233, fixing column;
[0024] 300, pole; 310, fixing hole. DETAILED DESCRIPTION
[0025] 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.
[0026] 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.
[0027] 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.
[0028] 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.
[0029] Please refer to Figure 1 and Figure 2 In this embodiment, the battery cover includes a cover body 100, an insulating member 200 and a pole 300, the cover body 100 is provided with a mounting hole 110; the insulating member 200 includes a connecting portion, an insulating portion 220 and a fixing portion which are sequentially connected from the outside to the inside, at least part of the connecting portion is fixed to the outer peripheral edge of the mounting hole 110, the fixing portion is surrounded to form a connecting hole 201, the fixing portion includes a first portion 231 and a second portion 232, the first portion 231 and the second portion 232 are respectively connected to the upper and lower ends of the insulating portion 220; the pole 300 is arranged in the connecting hole 201, at least part of the pole 300 is sandwiched between the first portion 231 and the second portion 232, and the insulating member 200 is sandwiched between the circumferential outer wall of the pole 300 and the circumferential inner wall of the mounting hole 110.
[0030] The battery cover in this embodiment is provided with a mounting hole 110 on the cover body 100, and the connecting portion of the insulating member 200 is fixed to the outer peripheral edge of the mounting hole 110, so as to realize the connection between the insulating member 200 and the cover body 100, and the fixing portion of the insulating member 200 includes a first portion 231 and a second portion 232 respectively connected to the upper and lower ends of the insulating portion 220, and at least part of the pole 300 is sandwiched between the first portion 231 and the second portion 232, so as to realize the fixed connection between the pole 300 and the insulating member 200, and the insulating portion 220 of the insulating member 200 is sandwiched between the circumferential outer wall of the pole 300 and the circumferential inner wall of the mounting hole 110, so as to realize the insulation between the pole 300 and the cover body 100. The battery cover has a simple structure, and only includes the cover body 100, the pole 300 and the insulating member 200, so as to simplify the structure of the battery cover, reduce the manufacturing difficulty and production cost, and thus improve the production quality and production efficiency.
[0031] It can be imagined that the pole 300 is divided into a positive pole 300 and a negative pole 300, that is, the cover body 100 has two mounting holes 110 correspondingly, and each mounting hole 110 is correspondingly installed with the above-mentioned insulating member 200. The cover body 100 in this embodiment is a plain aluminum sheet, and the insulating member 200 is an integrally injection-molded upper plastic, which will not be repeated here.
[0032] Optionally, the cover body 100 is further provided with an explosion-proof hole 130, and the explosion-proof hole 130 is installed with an explosion-proof plate 131. The explosion-proof hole 130 is provided between the two installation holes 110, that is, between the positive pole 300 and the negative pole 300; the explosion-proof plate 131 can realize the explosion-proof pressure relief function for the single battery, thereby improving the safety and reliability of the single battery.
[0033] Furthermore, the cover body 100 is also provided with a liquid injection hole 120, and the liquid injection hole 120 is used for injecting electrolyte, which will not be described in detail here.
[0034] Please refer to Figure 2 In this embodiment, the pole 300 is provided with a plurality of fixing holes 310 spaced apart along the circumferential direction, and the first portion 231 and / or the second portion 232 are provided with a plurality of fixing posts 233, which are inserted into the fixing holes 310 one by one. The use of a plurality of fixing posts 233 and the fixing holes 310 correspondingly plugged in one by one can prevent the pole 300 from rotating around its own axis in the connection hole 201 of the insulating member 200, play an anti-twist role, improve the connection strength and connection reliability between the pole 300 and the insulating member 200, and thus improve the reliability of use.
[0035] In this embodiment, the insulating member 200 is integrally formed by injection molding, and one end of the fixing column 233 is connected to the first portion 231, and the other end is connected to the second portion 232. That is, the pole 300 is first positioned and placed in the mounting hole 110, and the pole 300 and the mounting hole 110 are coaxially arranged, and then injection molding is performed in the gap between the mounting hole 110 and the pole 300 to form the insulating member 200 as a whole, and the fixing column 233 is integrally formed and fixed with the first portion 231 and the second portion 232, thereby improving the connection reliability between the insulating member 200 and the pole 300.
[0036] Optionally, a mounting step 111 is recessed at the junction of the hole wall of the mounting hole 110 and the top wall of the cover body 100 and / or at the junction of the hole wall of the mounting hole 110 and the bottom wall of the cover body 100, and the connecting portion is mounted on the mounting step 111, and the top wall of the insulating member 200 is not higher than the top wall of the cover body 100. By providing the mounting step 111, the connecting portion can be accommodated in the mounting step 111, thereby improving the connection strength and fixing reliability between the insulating member 200 and the cover body 100, and the top wall of the insulating member 200 is not higher than the top wall of the cover body 100, which can reduce the height of the battery cover, thereby reducing the height of the single battery finally produced.
[0037] As a preferred embodiment, the top wall of the cover body 100 and the bottom wall of the cover body 100 are both recessed with mounting steps 111, and the connecting portion includes a third portion 211 and a fourth portion 212, wherein the third portion 211 is mounted on the mounting step 111 located above, and the fourth portion 212 is mounted on the mounting step 111 located below. Thus, the third portion 211 does not exceed the top wall of the cover body 100, and the fourth portion 212 does not exceed the bottom wall of the cover body 100, so that the upper and lower end surfaces of the insulating member 200 do not exceed the cover body 100. In this embodiment, the upper and lower end surfaces of the insulating member 200 are flush with the top and bottom walls of the cover body 100, thereby reducing the total height of the battery cover and preventing the internal and external spaces of the single battery from being occupied.
[0038] Furthermore, the third portion 211 and the fourth portion 212 are both provided with a plurality of limiting posts 213 at intervals along the circumferential direction, and the upper mounting step 111 and the lower mounting step 111 are both provided with a plurality of limiting grooves 112. The coordinated installation of the limiting posts 213 and the limiting grooves 112 can prevent the insulating member 200 from twisting in the mounting hole 110 of the cover body 100, play an anti-twisting role, and improve the connection strength and connection reliability of the insulating member 200 and the cover body 100.
[0039] In an optional embodiment, the limiting column 213 provided on the third portion 211 is staggered with the limiting column 213 provided on the fourth portion 212. The connection portion provided in this way can not only be matched and fixedly connected with the mounting hole 110, but the staggered limiting column 213 is matched and connected with the limiting groove 112, which can further improve the torsion resistance, and can also facilitate the removal of the insulating member 200, so as to realize the disassembly and recycling of the single battery.
[0040] In another optional embodiment, the above-mentioned limiting groove 112 provided on the above-mentioned installation step 111 located at the top and the limiting groove 112 provided on the above-mentioned installation step 111 located at the bottom are coaxial and interconnected one by one, the above-mentioned insulating member 200 is injection molded as a whole, and the above-mentioned limiting column 213 provided on the above-mentioned third part 211 and the above-mentioned limiting column 213 provided on the above-mentioned fourth part 212 are connected one by one as a whole. After integral injection molding, the limiting column 213 is integrally molded and fixed with the third part 211 and the fourth part 212, and the limiting column 213 is penetrated in the limiting groove 112, which can improve the torsion resistance of the insulating member 200 in the installation hole 110, and improve the reliability and stability of the installation, but the insulating member 200 will not be removed from the installation hole 110. The number, position and structure of the limiting groove 112 are selected by those skilled in the art according to needs, and will not be repeated here.
[0041] This embodiment also provides a single cell, which includes a battery cover as described in any of the above solutions. The battery cover of the single cell has a simple structure, which can simplify the production process, reduce production costs, and improve production efficiency and production quality.
[0042] 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 cover plate body (100), wherein the cover plate body (100) is provided with a mounting hole (110); An insulating member (200), the insulating member (200) comprising a connecting portion, an insulating portion (220) and a fixing portion connected in sequence from outside to inside, at least a portion of the connecting portion being fixed to the outer peripheral edge of the mounting hole (110), the fixing portion being arranged to surround a connecting hole (201), the fixing portion comprising a first portion (231) and a second portion (232), the first portion (231) and the second portion (232) being connected to upper and lower ends of the insulating portion (220) respectively; A pole (300), wherein the pole (300) is arranged in the connecting hole (201), at least a portion of the pole (300) is sandwiched between the first portion (231) and the second portion (232), and the insulating member (200) is sandwiched between the circumferential outer wall of the pole (300) and the circumferential inner wall of the mounting hole (110).
2. The battery cover according to claim 1, characterized in that: The pole (300) is provided with a plurality of fixing holes (310) spaced apart along the circumferential direction, and the first part (231) and / or the second part (232) is provided with a plurality of fixing columns (233), and the fixing columns (233) are inserted into the fixing holes (310) one by one.
3. The battery cover according to claim 2, characterized in that: The insulating member (200) is integrally formed by injection molding, and one end of the fixing column (233) is connected to the first part (231), and the other end is connected to the second part (232).
4. The battery cover according to claim 1, characterized in that: A mounting step (111) is recessed at the junction of the hole wall of the mounting hole (110) and the top wall of the cover body (100) and / or at the junction of the hole wall of the mounting hole (110) and the bottom wall of the cover body (100), the connecting portion is mounted on the mounting step (111), and the top wall of the insulating member (200) is not higher than the top wall of the cover body (100).
5. The battery cover according to claim 4, characterized in that: The top wall of the cover body (100) and the bottom wall of the cover body (100) are both recessed with mounting steps (111), and the connecting portion comprises a third portion (211) and a fourth portion (212), wherein the third portion (211) is mounted on the mounting step (111) located above, and the fourth portion (212) is mounted on the mounting step (111) located below.
6. The battery cover according to claim 5, characterized in that: The third part (211) and the fourth part (212) are both provided with a plurality of limiting columns (213) at intervals along the circumferential direction, and the upper installation step (111) and the lower installation step (111) are both correspondingly provided with a plurality of limiting grooves (112).
7. The battery cover according to claim 6, characterized in that: The limiting column (213) provided on the third part (211) and the limiting column (213) provided on the fourth part (212) are staggered.
8. The battery cover according to claim 6, characterized in that: The limiting groove (112) provided on the upper installation step (111) and the limiting groove (112) provided on the lower installation step (111) are coaxial and interconnected in a one-to-one correspondence, the insulating member (200) is integrally formed by injection molding, and the limiting column (213) provided on the third part (211) and the limiting column (213) provided on the fourth part (212) are connected in a one-to-one correspondence as a whole.
9. The battery cover according to any one of claims 1 to 8, characterized in that: The cover plate body (100) is also provided with an explosion-proof hole (130), and an explosion-proof plate (131) is installed in cooperation with the explosion-proof hole (130).
10. A single cell, characterized in that: Comprising the battery cover according to any one of claims 1-9.