CN219067134U

CN219067134U - Explosion-proof lithium ion battery

Info

Publication number: CN219067134U
Application number: CN202223427251.7U
Authority: CN
Inventors: 肖洪才
Original assignee: Shenzhen Yongdeli New Energy Co ltd
Current assignee: Shenzhen Yongdeli New Energy Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-23
Anticipated expiration: 2032-12-19

Abstract

The utility model provides an explosion-proof lithium ion battery, which comprises an exhaust component, wherein the exhaust component comprises a negative electrode shell, a lithium ion battery, a positive electrode end head, two positioning rods, two moving blocks, two connecting rods and a piston; the bottom of the lithium ion battery is arranged on the inner wall of the bottom of the negative electrode shell, and the positive electrode end head is fixed at the top of the negative electrode shell. When the lithium ion battery generates pressure, the pressure jacks up the piston through the through hole, the piston drives the moving block to move through the connecting rod, the moving block slides on the positioning rod, the moving block compresses the springs in the moving process, the pressure is released from the plurality of exhaust holes, then the springs return under the action force of automatic elastic force of the springs, the springs drive the connecting rod to move downwards through the moving block, the connecting rod drives the piston to slide on the end head of the positive electrode, the piston moves to the lower part of the exhaust hole to shield, the explosion-proof effect can be timely achieved on the pressure release of the battery, and the battery is prevented from being scrapped or even exploded due to explosion or deformation of the battery.

Description

Explosion-proof lithium ion battery

Technical Field

The utility model relates to a lithium ion battery, in particular to an explosion-proof lithium ion battery, and belongs to the technical field of lithium ion batteries.

Background

Lithium ion battery: is a secondary battery (rechargeable battery) that operates mainly by means of lithium ions moving between a positive electrode and a negative electrode. Li+ is inserted and extracted back and forth between the two electrodes during charge and discharge: during charging, li+ is deintercalated from the positive electrode, and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true when discharging. The battery generally adopts a material containing lithium element as an electrode, and is representative of modern high-performance batteries;

if the lithium ion battery is overcharged, the battery is easy to bulge, and the battery can be scrapped or even exploded due to the fact that pressure relief cannot be timely carried out, so that the explosion-proof lithium ion battery is provided.

Disclosure of Invention

In view of the foregoing, it is desirable to provide an explosion-proof lithium ion battery that solves or mitigates the technical problems of the prior art, and at least provides a beneficial choice.

The technical scheme of the embodiment of the utility model is realized as follows: an explosion-proof lithium ion battery comprises an exhaust assembly, wherein the exhaust assembly comprises a negative electrode shell, a lithium ion battery, a positive electrode end head, two positioning rods, two moving blocks, two connecting rods and a piston;

the bottom of lithium ion battery install in on the bottom inner wall of negative pole casing, the anodal end is fixed in the top of negative pole casing, in the bottom of anodal end extends to the negative pole casing, be a plurality of exhaust holes of annular on the anodal end, all set up flutedly on the both sides inner wall of anodal end, two the tip of locating lever is fixed connection respectively in correspondence between the both sides inner wall of recess, two movable block is sliding connection respectively in correspondence on the locating lever, fixedly connected with spring between the top of movable block and the top inner wall of corresponding recess, the spring movable sleeve is established on the corresponding locating lever, two connecting rods are fixed connection respectively in the bottom of corresponding movable block, the top fixed connection of piston in the bottom of connecting rod, two through-holes have been seted up on the bottom inner wall of anodal end.

Further preferably, a sealing ring is fixedly connected to the piston, and the outer side of the sealing ring is in sliding connection with the inner wall of the positive electrode end.

Further preferably, the top of the lithium ion battery is fixedly connected with a negative electrode lead, and the end part of the negative electrode lead is fixedly connected with the inner wall of the negative electrode shell.

Further preferably, the top of the lithium ion battery is fixedly connected with a positive electrode lead, and the end part of the positive electrode lead is fixedly connected with the right side of the positive electrode end head.

Further preferably, an annular plate is fixedly connected to the positive electrode end, and a plurality of reinforcing rods are fixedly connected between the bottom of the annular plate and the top of the negative electrode shell in an annular shape.

Further preferably, the moving block is provided with a circular hole, and the inner wall of the circular hole is slidably connected with the outer side of the corresponding positioning rod.

Further preferably, a mounting hole is formed in the inner wall of the top of the negative electrode shell, and the inner wall of the mounting hole is fixedly connected with the outer side of the positive electrode end.

Further preferably, the outer side of the moving block is not in contact with the inner wall of the corresponding groove.

By adopting the technical scheme, the embodiment of the utility model has the following advantages:

when the lithium ion battery generates pressure, the pressure jacks up the piston through the through hole, the piston drives the moving block to move through the connecting rod, the moving block slides on the positioning rod, the moving block compresses the springs in the moving process, the pressure is released from the plurality of exhaust holes, then the springs return under the action force of automatic elastic force of the springs, the springs drive the connecting rod to move downwards through the moving block, the connecting rod drives the piston to slide on the end head of the positive electrode, the piston moves to the lower part of the exhaust hole to shield, the explosion-proof effect can be timely achieved on the pressure release of the battery, and the battery is prevented from being scrapped or even exploded due to explosion or deformation of the battery.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present utility model will become apparent by reference to the drawings and the following detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a cut-away perspective view of a negative electrode case according to the present utility model;

FIG. 3 is a perspective view of the piston and seal connection of the present utility model;

fig. 4 is an enlarged view of the area a of fig. 2 according to the present utility model.

Reference numerals: 1. an exhaust assembly; 2. a negative electrode case; 3. a lithium ion battery; 4. an anode end; 5. an exhaust hole; 6. a groove; 7. a positioning rod; 8. a moving block; 9. a spring; 10. a connecting rod; 11. a piston; 12. a through hole; 13. a seal ring; 14. a negative electrode lead; 15. a positive electrode lead; 16. an annular plate; 17. and a reinforcing rod.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-4, the embodiment of the utility model provides an explosion-proof lithium ion battery, which comprises an exhaust component 1, wherein the exhaust component 1 comprises a negative electrode shell 2, a lithium ion battery 3, a positive electrode end 4, two positioning rods 7, two moving blocks 8, two connecting rods 10 and a piston 11;

the bottom of lithium ion battery 3 is installed on the bottom inner wall of negative pole casing 2, anodal end 4 is fixed in the top of negative pole casing 2, the bottom of anodal end 4 extends to in the negative pole casing 2, be a plurality of exhaust holes 5 have been seted up to the annular on the anodal end 4, all set up fluted 6 on the both sides inner wall of anodal end 4, the tip of two locating levers 7 is fixed connection respectively between the both sides inner wall of corresponding fluted 6, two movable blocks 8 are sliding connection respectively on corresponding locating lever 7, fixedly connected with spring 9 between the top of movable block 8 and the top inner wall of corresponding fluted 6, spring 9 movable sleeve is established on corresponding locating lever 7, two connecting rods 10 are fixed connection respectively in the bottom of corresponding movable block 8, the top fixed connection of piston 11 is in the bottom of connecting rod 10, set up two through-holes 12 on the bottom inner wall of anodal end 4.

In one embodiment, the piston 11 is fixedly connected with a sealing ring 13, the outer side of the sealing ring 13 is slidably connected with the inner wall of the positive electrode end 4, and the sealing performance is improved due to the arrangement of the sealing ring 13.

In one embodiment, the top of the lithium ion battery 3 is fixedly connected with a negative electrode lead 14, the end of the negative electrode lead 14 is fixedly connected with the inner wall of the negative electrode casing 2, and the negative electrode lead 14 plays a role in connection.

In one embodiment, the top of the lithium ion battery 3 is fixedly connected with a positive electrode lead 15, the end of the positive electrode lead 15 is fixedly connected with the right side of the positive electrode terminal 4, and the arrangement of the positive electrode lead 15 plays a role in electric conduction.

In one embodiment, the positive terminal 4 is fixedly connected with an annular plate 16, a plurality of reinforcing rods 17 are fixedly connected between the bottom of the annular plate 16 and the top of the negative electrode shell 2 in an annular mode, and stability of the positive terminal 4 is improved through arrangement of the reinforcing rods 17.

In one embodiment, the moving block 8 is provided with a circular hole, the inner wall of the circular hole is slidably connected with the outer side of the corresponding positioning rod 7, and the circular hole limits the positioning rod 7 to prevent the moving block 8 from moving.

In one embodiment, the top inner wall of the negative electrode casing 2 is provided with a mounting hole, the inner wall of the mounting hole is fixedly connected with the outer side of the positive electrode terminal 4, and the positive electrode terminal 4 is mounted through the mounting hole to increase stability.

In one embodiment, the outer side of the moving block 8 is not in contact with the inner wall of the corresponding groove 6, the groove 6 limits the moving block 8, and the piston 11 drives the moving block 8 to move up and down only through the connecting rod 10, so that no offset occurs.

The utility model works when in work: when the lithium ion battery 3 is used, when pressure is generated by the lithium ion battery 3, the piston 11 is jacked up by the pressure through the through hole 12, the piston 11 drives the sealing ring 13 to slide in the positive electrode end 4, the piston 11 drives the connecting rod 10 to move upwards, the connecting rod 10 drives the corresponding moving block 8 to move, the moving block 8 slides on the corresponding positioning rod 7, the moving block 8 can not deviate when moving under the action of the circular hole, the corresponding spring 9 is compressed by the moving block 8 in the moving process, the pressure is released from the plurality of exhaust holes 5, then the spring 9 is reset under the action force of automatic elastic force of the spring 9, the connecting rod 10 drives the connecting rod 10 to move downwards, the piston 11 slides on the positive electrode end 4, and the piston 11 moves to the position below the exhaust holes 5, so that the explosion-proof effect is achieved, the explosion or deformation of the battery is prevented, the service life is prolonged, the stability of the positive electrode end 4 is increased through the annular plate 16 and the plurality of reinforcing rods 17, the fracture phenomenon of the positive electrode end 4 is prevented, and the service life of the lithium ion battery 3 is prolonged.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that various changes and substitutions are possible within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An explosion-proof lithium ion battery, includes exhaust subassembly (1), its characterized in that: the exhaust assembly (1) comprises a negative electrode shell (2), a lithium ion battery (3), a positive electrode end head (4), two positioning rods (7), two moving blocks (8), two connecting rods (10) and a piston (11);

the bottom of lithium ion battery (3) install in on the bottom inner wall of negative pole casing (2), anodal end (4) is fixed in the top of negative pole casing (2), in the bottom of anodal end (4) extends to negative pole casing (2), be annular on anodal end (4) and seted up a plurality of exhaust holes (5), all set up fluted (6) on the both sides inner wall of anodal end (4), two the tip of locating lever (7) respectively fixed connection in correspondence between the both sides inner wall of recess (6), two movable block (8) respectively sliding connection in correspondence on locating lever (7), fixedly connected with spring (9) between the top of movable block (8) and the top inner wall of recess (6) that corresponds, spring (9) movable sleeve is established on corresponding locating lever (7), two connecting rod (10) respectively fixed connection in the bottom of corresponding movable block (8), the top of piston (11) is in the bottom of connecting rod (10) is seted up on the bottom of two connecting rod (12).

2. An explosion-proof lithium ion battery according to claim 1, wherein: and a sealing ring (13) is fixedly connected to the piston (11), and the outer side of the sealing ring (13) is in sliding connection with the inner wall of the positive electrode end (4).

3. An explosion-proof lithium ion battery according to claim 1, wherein: the top of the lithium ion battery (3) is fixedly connected with a negative electrode lead (14), and the end part of the negative electrode lead (14) is fixedly connected with the inner wall of the negative electrode shell (2).

4. An explosion-proof lithium ion battery according to claim 1, wherein: the top of the lithium ion battery (3) is fixedly connected with a positive electrode lead (15), and the end part of the positive electrode lead (15) is fixedly connected with the right side of the positive electrode end head (4).

5. An explosion-proof lithium ion battery according to claim 1, wherein: the positive electrode end (4) is fixedly connected with an annular plate (16), and a plurality of reinforcing rods (17) are fixedly connected between the bottom of the annular plate (16) and the top of the negative electrode shell (2).

6. An explosion-proof lithium ion battery according to claim 1, wherein: the movable block (8) is provided with a circular hole, and the inner wall of the circular hole is in sliding connection with the outer side of the corresponding positioning rod (7).

7. An explosion-proof lithium ion battery according to claim 1, wherein: the inner wall of the top of the negative electrode shell (2) is provided with a mounting hole, and the inner wall of the mounting hole is fixedly connected with the outer side of the positive electrode end head (4).

8. An explosion-proof lithium ion battery according to claim 1, wherein: the outer side of the moving block (8) is not contacted with the inner wall of the corresponding groove (6).