CN215673779U

CN215673779U - Lithium ion battery safety valve with liquid leakage prevention function

Info

Publication number: CN215673779U
Application number: CN202122041770.9U
Authority: CN
Inventors: 杨梦华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-01-28
Anticipated expiration: 2031-08-27

Abstract

The utility model discloses a lithium ion battery safety valve with a liquid leakage prevention function, which comprises a valve body, wherein a gasket is fixedly connected to the bottom of the valve body, a protective film is arranged at the bottom of the gasket, a fixing ring is fixedly connected to the bottom of the inner wall of the valve body, a through hole is formed in the fixing ring, an annular clamping groove is formed in the top of the fixing ring, and a stop block is arranged at the top of the fixing ring. According to the utility model, the gasket is upwards extruded by the internal pressure of the battery to be bent and deformed, the gasket is punctured after contacting the puncture needle, the pressure released inside the battery quickly moves the stop block upwards, the gasket passes through the waterproof breathable film to be discharged after passing through the filter element, the plug block and the stop block perform first blocking on the splashed electrolyte, due to the special structure of the filter tank, the filter element performs second blocking on the splashed electrolyte, and the waterproof breathable film performs third blocking on the splashed electrolyte, so that multiple protection is realized, the electrolyte in the battery is effectively prevented from being sprayed out, and the safety is improved.

Description

Lithium ion battery safety valve with liquid leakage prevention function

Technical Field

The utility model relates to the technical field of lithium ion battery safety valves, in particular to a lithium ion battery safety valve with a liquid leakage prevention function.

Background

With the development of the lithium ion battery technology and the appearance of the materials with higher energy density, the lithium ion battery is more and more widely applied to the field of electric automobiles, the safety of the lithium ion battery is greatly improved compared with the traditional digital energy storage lithium ion battery, when the lithium ion battery is influenced by abnormal factors such as short circuit, high heat, overcharge and the like, high-pressure gas is easily formed inside the battery, and the danger of deformation of a battery shell and even explosion of the battery can be caused.

However, the conventional safety valve does not have a liquid leakage prevention function, and when the internal pressure of the battery is too high and the safety valve is opened to exhaust, the electrolyte inside the lithium ion battery is sprayed out, so that the liquid leakage of the battery occurs, and the user is harmed.

Therefore, it is necessary to invent a safety valve of a lithium ion battery with a liquid leakage prevention function to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lithium ion battery safety valve with a liquid leakage prevention function, and aims to solve the problems that the existing safety valve does not have the liquid leakage prevention function, when the internal pressure of a battery is overlarge and the safety valve is opened to exhaust, electrolyte in the lithium ion battery can be sprayed out, and the battery leakage occurs, so that damage is caused to a user.

In order to achieve the above purpose, the utility model provides the following technical scheme: the utility model provides a lithium ion battery relief valve with leak protection liquid function, includes the valve body, valve body bottom fixedly connected with gasket, the gasket bottom is equipped with the protection film, the solid fixed ring of valve body inner wall bottom fixedly connected with, gu fixed ring inside is equipped with the through-hole, gu fixed ring has seted up ring groove at the top, gu fixed ring top is equipped with the dog, dog bottom fixedly connected with chock, chock and through-hole phase-match, chock bottom fixedly connected with pjncture needle, the dog bottom is equipped with annular fixture block, annular fixture block and ring groove phase-match, the dog top is equipped with the backup pad, the backup pad both sides all with valve body inner wall fixed connection, fixedly connected with spring between dog and the backup pad, the backup pad top is equipped with the filtration piece, the waterproof ventilated membrane of valve body top fixedly connected with.

Preferably, the top of the filtering piece is provided with a plurality of filtering grooves, the cross section of each filtering groove is L-shaped, and the cross section area of the top of each filtering groove is smaller than that of the bottom of each filtering groove.

Preferably, the protective film is made of PE material, the gasket is made of metal material, and the waterproof and breathable film is a polytetrafluoroethylene film.

Preferably, the bottom of the stop block is fixedly connected with a sealing ring, and the sealing ring is made of rubber materials.

Preferably, the top of the stop block is fixedly connected with a support rod, and the outer surface of the support rod is provided with a reinforcing ring.

Preferably, the bottom of the supporting plate is provided with a first sliding groove, and the first sliding groove is connected with the supporting rod in a sliding manner.

Preferably, a second sliding groove is formed in the top of the first sliding groove, and a pressing block is arranged inside the second sliding groove.

Preferably, the top of the supporting rod is fixedly connected with a pressing block, and the pressing block is connected with the second sliding groove in a sliding mode.

In the technical scheme, the utility model provides the following technical effects and advantages:

1. the gasket is upwards extruded by the internal pressure of the battery to generate bending deformation, the gasket is punctured after touching the puncture needle, the pressure released inside the battery quickly moves the stop block upwards, the gasket passes through the waterproof breathable film to be discharged after passing through the filter element, the plug block and the stop block perform first blocking on the splashed electrolyte, due to the special structure of the filter tank, the filter element performs second blocking on the splashed electrolyte, the waterproof breathable film performs third blocking on the splashed electrolyte, multiple protection is performed, the electrolyte in the battery is effectively prevented from being sprayed out, meanwhile, the waterproof breathable film prevents external water vapor from entering the battery, the protective film protects the gasket, the electrolyte is prevented from corroding the gasket, the service life of the battery is prolonged, the device has the liquid leakage prevention function, multiple protection is performed, the electrolyte in the battery is effectively prevented from being sprayed out, and no harm is caused to a user, the safety is improved;

2. improve this device leakproofness through being equipped with the sealing ring of making by rubber materials, prevent that electrolyte from leaking, the beaded finish improves bracing piece stability, and when the dog shifts up, drive the bracing piece at the inside lapse of first spout, the briquetting shifts up in the inside lapse of second spout, improves the dog and shifts up stability.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a cross-sectional view of the support plate of the present invention;

FIG. 4 is a perspective view of a filter element of the present invention;

fig. 5 is a perspective view of another aspect of the filter of the present invention;

FIG. 6 is a schematic view of a connection structure of a retaining ring and a gasket according to the present invention.

Description of reference numerals:

1. a valve body; 2. a gasket; 3. a protective film; 4. a fixing ring; 5. a through hole; 6. an annular neck; 7. a stopper; 8. a chock block; 9. puncturing needle; 10. an annular fixture block; 11. a support plate; 12. a spring; 13. a filter member; 14. a waterproof breathable film; 15. a filter tank; 16. a seal ring; 17. a support bar; 18. a reinforcement ring; 19. a first chute; 20. a second chute; 21. and (7) briquetting.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

The utility model provides a lithium ion battery safety valve with a liquid leakage prevention function as shown in figures 1-6, which comprises a valve body 1, wherein a gasket 2 is fixedly connected to the bottom of the valve body 1, a protective film 3 is arranged at the bottom of the gasket 2, a fixing ring 4 is fixedly connected to the bottom of the inner wall of the valve body 1, a through hole 5 is arranged inside the fixing ring 4, an annular clamping groove 6 is arranged at the top of the fixing ring 4, a stop dog 7 is arranged at the top of the fixing ring 4, a plug block 8 is fixedly connected to the bottom of the stop dog 7, the plug block 8 is matched with the through hole 5, a puncture needle 9 is fixedly connected to the bottom of the plug block 8, an annular clamping block 10 is arranged at the bottom of the stop dog 7, the annular clamping groove 6 is matched with the annular clamping groove 10, a support plate 11 is arranged at the top of the stop dog 7, both sides of the support plate 11 are fixedly connected with the inner wall of the valve body 1, and a spring 12 is fixedly connected between the stop dog 7 and the support plate 11, the top of the supporting plate 11 is provided with a filtering piece 13, and the top of the valve body 1 is fixedly connected with a waterproof breathable film 14.

Furthermore, in the above technical solution, the top of the filter element 13 is provided with a plurality of filter tanks 15, the number of the filter tanks 15 is multiple, the cross-sectional shape of the filter tanks 15 is L-shaped, the cross-sectional area of the top of the filter tank 15 is smaller than that of the bottom of the filter tank 15, when the battery is in use, when the internal pressure of the battery is too high, the gasket 2 is pressed upwards to be bent and deformed, the gasket 2 is punctured after contacting the puncture needle 9, the stop 7 is rapidly moved upwards by the pressure released from the internal of the battery, and the pressure passes through the waterproof and breathable film 14 to be discharged after passing through the filter element 13, the plug 8 and the stop 7 perform first blocking on the splashed electrolyte, due to the special structure of the filter tanks 15, the filter element 13 performs second blocking on the splashed electrolyte, the waterproof and breathable film 14 performs third blocking on the splashed electrolyte, thereby performing multiple protection, and effectively preventing the electrolyte in the battery from being sprayed out, simultaneously, inside waterproof ventilated membrane 14 prevents that external steam from entering into the battery, protection film 3 protected gasket 2, prevents that electrolyte from corroding gasket 2, improves battery life, and this device has the prevention of liquid leakage function, and multiple protection prevents effectively that the inside electrolyte of battery from spouting, can not cause harm to the user, improves the security.

Further, in above-mentioned technical scheme, protection film 3 is made by the PE material, gasket 2 is made by metal material, waterproof ventilated membrane 14 is the polytetrafluoroethylene membrane, and inside waterproof ventilated membrane 14 prevented that external steam from entering into the battery, protection film 3 protected gasket 2, prevented that electrolyte from corroding gasket 2, improved battery life.

As shown in fig. 1-3: the bottom of the stop block 7 is fixedly connected with a sealing ring 16, the sealing ring 16 is made of rubber materials, and the sealing ring 16 made of the rubber materials improves the sealing performance of the device and prevents electrolyte from leaking.

Further, in the above technical scheme, the top of the stopper 7 is fixedly connected with a support rod 17, the outer surface of the support rod 17 is provided with a reinforcement ring 18, and the reinforcement ring 18 improves the stability of the support rod 17.

Further, in the above technical scheme, a first sliding groove 19 is formed in the bottom of the supporting plate 11, the first sliding groove 19 is connected with the supporting rod 17 in a sliding manner, and when the stopper 7 moves upwards, the supporting rod 17 is driven to slide upwards in the first sliding groove 19, so that the upward movement stability of the stopper 7 is improved.

Further, in the above technical solution, a second sliding groove 20 is formed in the top of the first sliding groove 19, a pressing block 21 is arranged inside the second sliding groove 20, and the pressing block 21 slides upwards inside the second sliding groove 20, so that the upward movement stability of the stopper 7 is improved.

Further, in the above technical solution, the top of the support rod 17 is fixedly connected with the pressing block 21, the pressing block 21 is slidably connected with the second sliding groove 20, the support rod 17 moves upward to drive the pressing block 21 to move upward, so that the pressing block 21 slides upward in the second sliding groove 20, and the upward movement stability of the stopper 7 is improved.

This practical theory of operation:

referring to the attached drawings 1-6 of the specification, when the battery is used, when the internal pressure of the battery is too high, the gasket 2 is upwards extruded to be bent and deformed, the gasket 2 is punctured after contacting the puncture needle 9, the stop dog 7 is quickly moved upwards by the pressure released inside the battery, and the pressure passes through the waterproof breathable film 14 to be discharged after passing through the filter piece 13, the plug block 8 and the stop dog 7 perform first blocking on the splashed electrolyte, due to the special structure of the filter tank 15, the filter piece 13 performs second blocking on the splashed electrolyte, the waterproof breathable film 14 performs third blocking on the splashed electrolyte, multiple protection is performed, the electrolyte inside the battery is effectively prevented from being sprayed out, meanwhile, the waterproof breathable film 14 prevents external water vapor from entering the inside of the battery, the protection film 3 protects the gasket 2, the electrolyte is prevented from corroding the gasket 2, and the service life of the battery is prolonged;

referring to the attached drawings 1-3 of the specification, when the device is used, the sealing ring 16 made of rubber materials improves the sealing performance of the device and prevents electrolyte from leaking, the reinforcing ring 18 improves the stability of the supporting rod 17, when the stop dog 7 moves upwards, the supporting rod 17 is driven to slide upwards in the first sliding groove 19, the pressing block 21 slides upwards in the second sliding groove 20, and the upward movement stability of the stop dog 7 is improved.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.

Claims

1. The utility model provides a lithium ion battery relief valve with prevention of liquid leakage function, includes valve body (1), its characterized in that: the bottom of the valve body (1) is fixedly connected with a gasket (2), the bottom of the gasket (2) is provided with a protective film (3), the bottom of the inner wall of the valve body (1) is fixedly connected with a fixing ring (4), a through hole (5) is formed in the fixing ring (4), the top of the fixing ring (4) is provided with an annular clamping groove (6), the top of the fixing ring (4) is provided with a stop block (7), the bottom of the stop block (7) is fixedly connected with a plug block (8), the plug block (8) is matched with the through hole (5), the bottom of the plug block (8) is fixedly connected with a puncture needle (9), the bottom of the stop block (7) is provided with an annular clamping block (10), the annular clamping block (10) is matched with the annular clamping groove (6), the top of the stop block (7) is provided with a supporting plate (11), and two sides of the supporting plate (11) are fixedly connected with the inner wall of the valve body (1), fixedly connected with spring (12) between dog (7) and backup pad (11), backup pad (11) top is equipped with filters piece (13), valve body (1) top fixedly connected with waterproof ventilated membrane (14).

2. The lithium ion battery safety valve with the liquid leakage prevention function of claim 1, wherein: filter piece (13) top and seted up filter tank (15), filter tank (15) quantity sets up to a plurality ofly, filter tank (15) cross sectional shape sets up to L shape, filter tank (15) top cross sectional area is less than bottom cross sectional area.

3. The lithium ion battery safety valve with the liquid leakage prevention function of claim 1, wherein: the protective film (3) is made of PE materials, the gasket (2) is made of metal materials, and the waterproof breathable film (14) is a polytetrafluoroethylene film.

4. The lithium ion battery safety valve with the liquid leakage prevention function of claim 1, wherein: the bottom of the stop block (7) is fixedly connected with a sealing ring (16), and the sealing ring (16) is made of rubber materials.

5. The lithium ion battery safety valve with the liquid leakage prevention function of claim 1, wherein: the top of the stop block (7) is fixedly connected with a support rod (17), and a reinforcing ring (18) is arranged on the outer surface of the support rod (17).

6. The lithium ion battery safety valve with the liquid leakage prevention function of claim 5, wherein: a first sliding groove (19) is formed in the bottom of the supporting plate (11), and the first sliding groove (19) is connected with the supporting rod (17) in a sliding mode.

7. The lithium ion battery safety valve with the liquid leakage prevention function of claim 6, wherein: a second sliding groove (20) is formed in the top of the first sliding groove (19), and a pressing block (21) is arranged inside the second sliding groove (20).

8. The lithium ion battery safety valve with the liquid leakage prevention function of claim 7, wherein: the top of the supporting rod (17) is fixedly connected with a pressing block (21), and the pressing block (21) is connected with the second sliding groove (20) in a sliding mode.