Lithium battery cap structure

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a lithium battery cap structure which comprises a rubber ring main body, a top cover is arranged on the inner side of the rubber ring main body, a PTC plate is arranged at the bottom end of the top cover, an anti-explosion aluminum sheet is arranged at the bottom end of the PTC plate, an insulating sheet is arranged at the bottom end of the anti-explosion aluminum sheet, a connecting aluminum sheet is arranged at the bottom end of the insulating sheet, and the connecting aluminum sheet is arranged at the bottom end of the connecting aluminum sheet. The bottom end of the PTC plate is fixedly provided with a fixing plate, the bottom end of the fixing plate is fixedly connected with a fixing pipe, the inner side of the fixing pipe is movably connected with a telescopic rod, the bottom end of the inner wall of the explosion-proof aluminum sheet is fixedly provided with a fixing block, and the top end of the fixing block is provided with a groove matched with the telescopic rod. By arranging a PTC plate, an anti-explosion aluminum sheet, a connecting aluminum sheet, a fixing plate, a fixing pipe, a telescopic rod, a through hole and a spring, the connecting tightness is improved, falling is not prone to occurring, and practicability is enhanced.

Description

Technical Field

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

[0002] With the development of microelectronics technology, the increasing number of miniaturized devices has put forward higher requirements for power sources. Among them, lithium batteries have entered a large-scale practical stage with their light weight, high capacity and long service life. They are widely used as integrated circuit power sources. The battery cap structure, as an important component of lithium batteries, acts as a positive conductive terminal, a safety valve and other functions in lithium batteries. At the same time, it provides a battery sealing function to make the battery have good explosion-proof performance.

[0003] After searching, the patent number CN209626265U has been published, which mentions a new type of lithium battery cap structure, which includes a convex electrode cap, a PTC plate, and a concave explosion-proof aluminum sheet from top to bottom; the convex electrode cap, the PTC plate, and the concave explosion-proof aluminum sheet are aligned and sealed and fixed by the outer sealing ring; a Z-shaped insulating rubber ring is arranged between the explosion-proof aluminum sheet and the sealing ring, a U-shaped connecting aluminum sheet is arranged below the concave explosion-proof aluminum sheet, a convex block is arranged in the middle of the U-shaped connecting aluminum sheet, the convex block is tightly connected to the bottom of the concave explosion-proof aluminum sheet, and the PTC plate and the concave explosion-proof aluminum sheet are provided with a reset spring. The utility model has a novel structure, is tightly connected and is not easy to separate.

[0004] Although the above scheme solves the problems raised in the background technology, the following shortcomings still exist: in the process of tightly connecting the concave explosion-proof aluminum sheet and the connecting aluminum sheet through the restoring force of the spring, the spring deforms when subjected to force, resulting in poor stability, easy falling off, and poor practicality. Utility Model Content

[0005] The purpose of the utility model is to provide a lithium battery cap structure to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lithium battery cap structure comprises an apron body, a top cover is provided on the inner side of the apron body, a PTC plate is provided on the bottom end of the top cover, an explosion-proof aluminum sheet is provided on the bottom end of the PTC plate, an insulating sheet is provided on the bottom end of the explosion-proof aluminum sheet, a connecting aluminum sheet is provided on the bottom end of the insulating sheet, a fixing plate is fixedly installed on the bottom end of the PTC plate, a fixing tube is fixedly connected to the bottom end of the fixing plate, a telescopic rod is movably connected to the inner side of the fixing tube, a fixing block is fixedly installed on the bottom end of the inner wall of the explosion-proof aluminum sheet, and a groove matching the telescopic rod is provided on the top end of the fixing block.

[0008] As a preferred solution of the utility model, a through hole is opened on the outer side of the top cover.

[0009] As a preferred solution of the present invention, a protrusion is provided on the inner side of the connecting aluminum sheet.

[0010] As a preferred solution of the present invention, the diameter of the fixing plate is equal to the diameter of the fixing block.

[0011] As a preferred solution of the utility model, a spring is provided on the outer side of the telescopic rod.

[0012] As a preferred solution of the present invention, the number of the groove is one.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, a PTC plate, an explosion-proof aluminum sheet, a connecting aluminum sheet, a fixing plate, a fixing tube, a telescopic rod, a through hole and a spring are arranged in a lithium battery cap structure, so that when the lithium battery falls due to an external force, the PTC plate drives the fixing plate to move, and the tightness of the connection is improved with the cooperation of the explosion-proof aluminum sheet, the connecting aluminum sheet, the fixing tube, the telescopic rod, the through hole and the spring, so that the battery is not easy to fall off, thereby enhancing the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the PTC plate, fixing block and groove structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the explosion-proof aluminum sheet and bump structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the insulating sheet and the connecting aluminum sheet of the utility model;

[0019] Figure 5 It is a schematic diagram of the structure of the fixed plate, fixed tube, telescopic rod and spring of the utility model.

[0020] In the figure: 1. rubber ring body; 2. top cover; 3. PTC board; 4. explosion-proof aluminum sheet; 5. insulating sheet; 6. connecting aluminum sheet; 7. fixing plate; 8. fixing tube; 9. telescopic rod; 10. fixing block; 11. groove; 12. through hole; 13. protrusion; 14. spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings below. Several embodiments of the utility model are given. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] For examples, see Figure 1-5 , the utility model provides a technical solution:

[0026] A lithium battery cap structure comprises an apron body 1, a top cover 2 is arranged on the inner side of the apron body 1, a PTC plate 3 is arranged on the bottom end of the top cover 2, an explosion-proof aluminum sheet 4 is arranged on the bottom end of the PTC plate 3, an insulating sheet 5 is arranged on the bottom end of the explosion-proof aluminum sheet 4, a connecting aluminum sheet 6 is arranged on the bottom end of the insulating sheet 5, a fixing plate 7 is fixedly installed on the bottom end of the PTC plate 3, a fixing tube 8 is fixedly connected to the bottom end of the fixing plate 7, a telescopic rod 9 is movably connected to the inner side of the fixing tube 8, and a fixing block 10 is fixedly installed on the bottom end of the inner wall of the explosion-proof aluminum sheet 4, so that when the lithium battery falls due to external force, the PTC plate 3 drives the fixing plate 7 to move, the spring 14 is deformed by force to generate rebound force, and drives the explosion-proof aluminum sheet 4 to move, and at the same time, the telescopic rod 9 moves along the fixing tube 8 to limit the spring 14, and the tightness of the connection is improved under the cooperation of the connecting aluminum sheet 6 and the through hole 12, so that it is not easy to fall off;

[0027] A through hole 12 is provided on the outer side of the top cover 2, a protrusion 13 is provided on the inner side of the connecting aluminum sheet 6, the diameter of the fixing plate 7 is equal to the diameter of the fixing block 10, and a spring 14 is provided on the outer side of the telescopic rod 9. When the lithium battery falls due to external force, the PTC plate 3 drives the fixing plate 7 to move, and the spring 14 is deformed by force to generate a rebound force, driving the explosion-proof aluminum sheet 4 to move. At the same time, the telescopic rod 9 moves along the fixing tube 8 to limit the spring 14, so that the explosion-proof aluminum sheet 4 is pressed against the connecting aluminum sheet 6, thereby improving the tightness of the connection and preventing it from falling off. When the internal pressure of the lithium battery is too large, the pressure is released through the through hole 12, thereby enhancing the practicality.

[0028] In this embodiment, please refer to Figure 2 and Figure 5 The top of the fixed block 10 is provided with a groove 11 adapted to the telescopic rod 9, so that the telescopic rod 9 is limited by the groove 11;

[0029] There is only one groove 11 , so the groove 11 limits the telescopic rod 9 and enhances stability.

[0030] The working process of the utility model is as follows: when in use, check whether the appearance of the lithium battery is damaged. When the lithium battery falls due to external force, the PTC plate 3 drives the fixed plate 7 to move, and the spring 14 is deformed by force to generate a rebound force, which drives the explosion-proof aluminum sheet 4 to move. At the same time, the telescopic rod 9 moves along the fixed tube 8 to limit the spring 14, so that the explosion-proof aluminum sheet 4 is pressed against the connecting aluminum sheet 6, thereby improving the tightness of the connection and preventing it from falling off easily. When the internal pressure of the lithium battery is too large, the pressure is released through the through hole 12. Among them, the telescopic rod 9 is limited by the groove 11, which enhances the stability and has promotion value.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cap structure, comprising a rubber ring body (1), characterized in that: A top cover (2) is provided on the inner side of the rubber ring body (1); a PTC plate (3) is provided on the bottom end of the top cover (2); an explosion-proof aluminum sheet (4) is provided on the bottom end of the PTC plate (3); an insulating sheet (5) is provided on the bottom end of the explosion-proof aluminum sheet (4); a connecting aluminum sheet (6) is provided on the bottom end of the insulating sheet (5); a fixing plate (7) is fixedly installed on the bottom end of the PTC plate (3); a fixing tube (8) is fixedly connected to the bottom end of the fixing plate (7); a telescopic rod (9) is movably connected to the inner side of the fixing tube (8); a fixing block (10) is fixedly installed on the bottom end of the inner wall of the explosion-proof aluminum sheet (4); a groove (11) matching the telescopic rod (9) is provided on the top end of the fixing block (10).

2. A lithium battery cap structure according to claim 1, characterized in that: A through hole (12) is provided on the outer side of the top cover (2).

3. A lithium battery cap structure according to claim 1, characterized in that: A convex block (13) is provided on the inner side of the connecting aluminum sheet (6).

4. A lithium battery cap structure according to claim 1, characterized in that: The diameter of the fixing plate (7) is equal to the diameter of the fixing block (10).

5. A lithium battery cap structure according to claim 1, characterized in that: A spring (14) is provided on the outer side of the telescopic rod (9).

6. A lithium battery cap structure according to claim 1, characterized in that: The number of the groove (11) is one.

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