CN210692600U

CN210692600U - Heat-sensitive utmost point post top cap structure

Info

Publication number: CN210692600U
Application number: CN201922195919.1U
Authority: CN
Inventors: 王有生; 李华; 远浩; 吴清泉
Original assignee: Changzhou Red Fairy Precision Technology Co Ltd
Current assignee: Changzhou Red Fairy Precision Technology Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-06-05
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to the technical field of battery top covers, and discloses a heat-sensitive polar pole top cover structure, which comprises a top cover plate, a heat-sensitive polar pole and a polar block electrically connected with an external circuit, wherein the top cover plate is provided with a through hole which runs through the top cover plate from top to bottom; the pole block is sleeved on the upper extension section of the thermosensitive pole and is electrically connected with the thermosensitive pole; when the circuit takes place the short circuit, the electric current increase of thermal-sensitive utmost point post flows through, and thermal-sensitive utmost point post generates heat, and resistance also crescent to reduce the electric current in the return circuit, play short-circuit protection's effect to the battery, thermal-sensitive utmost point post can not the fusing damage simultaneously, and the circuit resumes to continue to use after normal, has prolonged the life of battery top cap, and the structure of battery top cap is simpler.

Description

Heat-sensitive utmost point post top cap structure

Technical Field

The patent of the utility model relates to a battery top cap's technical field particularly, relates to heat-sensitive utmost point post top cap structure.

Background

A "lithium battery" is a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Because the chemical properties of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high, and the lithium battery becomes the mainstream at present along with the development of scientific technology.

Traditional battery top cap includes top cap board, utmost point post, utmost point piece and fuse structure etc. and during the utmost point post wore to establish at the top cap board, through fuse structure fusing realization short-circuit protection during the battery short circuit.

Because the fuse structure can all fuse when the battery short circuit, need to change the fuse structure or directly scrap the battery, realized the short-circuit protection function, shortened the life of battery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat-sensitive utmost point post top cap structure aims at solving prior art, and the fuse structure realizes the short-circuit protection but shortens battery life's problem.

The utility model discloses a realize like this, heat-sensitive utmost point post top cap structure, including lamina tecti, heat-sensitive utmost point post and be used for with the polar block of external circuit electric connection, the lamina tecti has the perforating hole, the perforating hole runs through from top to bottom the lamina tecti, heat-sensitive utmost point post is worn to establish in the perforating hole, the upper end of heat-sensitive utmost point post extends up to the top of lamina tecti forms the upper extension section, the lower extreme downwardly extending of heat-sensitive utmost point post forms the lower extension section to the below of lamina tecti, lower extension section and electric core electric connection; the pole block is sleeved on the upper extension section of the thermosensitive pole and is electrically connected with the thermosensitive pole; the thermosensitive polar pole is a thermistor.

Further, the upper part of the through hole is recessed outwards to form a fixing groove, and the pole block is embedded into the fixing groove.

Further, the fixing groove is rectangular, and the outer peripheral surface of the pole piece abuts against the inner wall surface of the fixing groove.

Further, the top surface of the pole piece is higher than the upper surface of the top cover plate.

Furthermore, the heat-sensitive pole penetrates through the pole block and is exposed outside.

Furthermore, the upper end surface of the thermosensitive pole is parallel to the top surface of the pole block.

Further, the lower end face of the heat-sensitive pole is lower than the lower surface of the top cover plate.

Further, the thermosensitive pole is cylindrical.

Compared with the prior art, the utility model provides a thermal-sensitive pole top cover structure, the lower extension section of the thermal-sensitive pole is electrically connected with the battery cell, the upper extension section is electrically connected with the pole block, and then is electrically connected with the external circuit through the pole block, thereby realizing the conduction of the battery cell and the external circuit, supplying power for the external circuit, and the current normally flows through the thermal-sensitive pole; when the circuit takes place the short circuit, the electric current increase of thermal-sensitive utmost point post flows through, and thermal-sensitive utmost point post generates heat, and resistance also crescent to reduce the electric current in the return circuit, play short-circuit protection's effect to the battery, thermal-sensitive utmost point post can not the fusing damage simultaneously, and the circuit resumes to continue to use after normal, has prolonged the life of battery top cap, and the structure of battery top cap is simpler.

Drawings

Fig. 1 is a schematic perspective view of a top cap structure of a thermosensitive terminal provided by the present invention;

fig. 2 is a sectional schematic view of the top cap structure of the thermosensitive pole provided by the present invention;

fig. 3 is a schematic perspective view of the top cover plate provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1-3, the preferred embodiment of the present invention is shown.

The top cover structure of the thermal-sensitive electrode post provided in this embodiment can be applied to a lithium ion battery, and certainly, can also be applied to other batteries, which is not limited to the application in this embodiment.

The top cover plate 11 is provided with a through hole 14, the through hole 14 penetrates through the top cover plate 11 from top to bottom, the thermosensitive polar column 12 is arranged in the through hole 14 in a penetrating manner, the upper end of the thermosensitive polar column 12 extends upwards to the upper part of the top cover plate 11 to form an upper extension section, the lower end of the thermosensitive polar column 12 extends downwards to the lower part of the top cover plate 11 to form a lower extension section, and the lower extension section is electrically connected with the battery core; the pole block 13 is sleeved on the upper extension section of the thermosensitive pole 12 and is electrically connected with the thermosensitive pole 12; the thermosensitive pole 12 is a thermistor.

In the top cover structure of the thermosensitive pole, the lower extension section of the thermosensitive pole 12 is electrically connected with the battery core, the upper extension section is electrically connected with the pole block 13, and then is electrically connected with an external circuit through the pole block 13, so that the battery core is conducted with the external circuit to supply power to the external circuit, and current normally flows through the thermosensitive pole 12; when the circuit takes place the short circuit, the electric current increase of thermal-sensitive utmost point post 12 flows through, and thermal-sensitive utmost point post 12 generates heat, and resistance also crescent to reduce the electric current in the return circuit, play short-circuit protection's effect to the battery, thermal-sensitive utmost point post 12 can not the fusing damage simultaneously, can continue to use after the circuit resumes normally, has prolonged the life of battery top cap, and the structure of battery top cap is simpler.

The upper portion of the through hole 14 is recessed outward to form a fixing groove 15, the pole block 13 is fitted into the fixing groove 15, the fixing groove 15 is rectangular, and the outer peripheral surface of the pole block 13 abuts against the inner wall surface of the fixing groove 15.

The fixed slot 15 of rectangle form plays limiting displacement to utmost point piece 13 for utmost point piece 13 can not take place to rock in fixed slot 15, has improved utmost point piece 13's steadiness.

The top surface of the pole block 13 is higher than the upper surface of the top cover plate 11, so that the pole block 13 is electrically connected with an external circuit conveniently, and the thermosensitive pole column 12 is exposed outside through the pole block 13.

The upper end surface of the thermosensitive polar pole 12 is arranged in parallel with the top surface of the polar block 13.

The lower end face of the thermosensitive polar column 12 is lower than the lower surface of the top cover plate 11, so that the thermosensitive polar column 12 is electrically connected with a battery core inside the battery conveniently.

Specifically, the heat-sensitive pole 12 has a cylindrical shape.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The top cover plate is provided with a through hole, the through hole penetrates through the top cover plate from top to bottom, the thermosensitive polar column is arranged in the through hole in a penetrating manner, the upper end of the thermosensitive polar column extends upwards to the upper part of the top cover plate to form an upper extension section, the lower end of the thermosensitive polar column extends downwards to the lower part of the top cover plate to form a lower extension section, and the lower extension section is electrically connected with the battery core; the pole block is sleeved on the upper extension section of the thermosensitive pole and is electrically connected with the thermosensitive pole; the thermosensitive polar pole is a thermistor.

2. A heat-sensitive pole cap structure according to claim 1, wherein the upper portion of the through hole is outwardly recessed to form a fixing groove, and the pole piece is fitted into the fixing groove.

3. A heat-sensitive pole top cover structure according to claim 2, wherein the fixing groove is rectangular, and an outer peripheral surface of the pole piece abuts against an inner wall surface of the fixing groove.

4. A heat-sensitive pole header structure of claim 3, wherein the top surface of the pole piece is higher than the upper surface of the header plate.

5. A heat-sensitive pole top cover structure as claimed in claim 4, wherein the heat-sensitive pole is exposed to the outside through the pole block.

6. A heat-sensitive pole top cover structure according to claim 5, wherein the upper end surface of the heat-sensitive pole is arranged in parallel with the top surface of the pole block.

7. A heat-sensitive pole top cover structure as claimed in any one of claims 1 to 6, wherein the lower end surface of the heat-sensitive pole is lower than the lower surface of the top cover plate.

8. A heat-sensitive pole top cover structure according to any one of claims 1 to 6, wherein the heat-sensitive pole is cylindrical.