CN215680888U

CN215680888U - Lithium battery pressure relief device

Info

Publication number: CN215680888U
Application number: CN202120737303.7U
Authority: CN
Inventors: 蒲金鹏; 李雪; 王亚峰; 蒲金山
Original assignee: Nanjing Junrui New Energy Automobile Technology Co ltd
Current assignee: Nanjing Junrui New Energy Automobile Technology Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2022-01-28
Anticipated expiration: 2031-04-12

Abstract

The utility model discloses a lithium battery pressure relief device which comprises a battery cover plate, a pressure relief assembly and an opening and closing driving assembly, wherein the pressure relief assembly and the opening and closing driving assembly are arranged at the upper end of the battery cover plate, and the lower end of the opening and closing driving assembly is arranged in the battery cover plate; the middle part of battery apron upper end is equipped with the gas outlet, the relative both sides of gas outlet are equipped with shifting chute and seal groove respectively, the inside of shifting chute is equipped with the closing plate, the inside of seal groove is located to the one end of closing plate is portable, the one end that the closing plate is close to the seal groove is conical setting, the upper end that the seal groove was kept away from to the closing plate is equipped with the rack. The utility model belongs to the technical field of lithium battery pressure relief, and particularly provides a lithium battery pressure relief device which is simple in structure, good in exhaust effect, not easy to pollute, good in sealing performance and strong in practicability, and a pressure relief assembly can be disassembled and replaced.

Description

Lithium battery pressure relief device

Technical Field

The utility model belongs to the technical field of lithium battery pressure relief, and particularly relates to a lithium battery pressure relief device.

Background

Because the lithium battery has the advantages of small volume, high energy density, long service life, environmental protection and the like, the lithium battery is widely applied to the industries of automobiles, electronic products, energy storage systems and the like. And in the charging process of the lithium battery, gas can be released due to the chemical reaction in the lithium battery, so that the internal air pressure of the lithium battery is increased. When the air pressure in the lithium battery is too high, the lithium battery is very easy to cause fire and explosion, so that the air pressure in the lithium battery needs to be exhausted and decompressed when reaching a certain value.

In a conventional lithium battery, a pressure relief hole is generally formed in a battery cover plate to eliminate air pressure inside a battery case, thereby preventing explosion of the battery. However, after the pressure is released, the secondary sealing cannot be realized, and the continuous pressure release cannot be performed, which affects the use of the battery.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the lithium battery pressure relief device which is simple in structure, good in exhaust effect, not easy to pollute, good in sealing property and strong in practicability, and the pressure relief component can be disassembled and replaced.

The technical scheme adopted by the utility model is as follows: the utility model relates to a lithium battery pressure relief device which comprises a battery cover plate, a pressure relief assembly and an opening and closing driving assembly, wherein the pressure relief assembly and the opening and closing driving assembly are arranged at the upper end of the battery cover plate, and the lower end of the opening and closing driving assembly is arranged in the battery cover plate; the middle part of the upper end of the battery cover plate is provided with an air outlet, two opposite sides of the air outlet are respectively provided with a moving groove and a sealing groove, a sealing plate is arranged in the moving groove, one end of the sealing plate is movably arranged in the sealing groove, one end of the sealing plate close to the sealing groove is arranged in a conical shape, and the upper end of the sealing plate far away from the sealing groove is provided with a rack; the opening and closing driving assembly comprises a driving box, a driving motor and a gear, the driving box is arranged at the upper end of the battery cover plate, the driving motor is arranged in the driving box, the gear is sleeved on the outer side of an output shaft of the driving motor, and the gear penetrates through the upper end of the battery cover plate and is meshed and connected with the rack; the pressure release subassembly is including a pressure release section of thick bamboo, lifting disk and rotary disk, the upper end of battery apron is located to a pressure release section of thick bamboo, the upper end of gas outlet is located to a pressure release section of thick bamboo, the inside of a pressure release section of thick bamboo can be located to the lifting disk from top to bottom slip, the inside upper end of a pressure release section of thick bamboo is located to the rotary disk, be equipped with compression spring between the lower extreme of rotary disk and the upper end of lifting disk, compression spring's both sides all are equipped with presses the compression leg, press the lower extreme of compression leg to locate the upper end of lifting disk, the upper end of pressing the compression leg link up the rotary disk and locate the outside of rotary disk.

Further, be equipped with the gas outlet branched pipe on the lateral wall of a pressure release section of thick bamboo, the branched pipe of giving vent to anger link up on the lateral wall of locating a pressure release section of thick bamboo, the branched pipe of giving vent to anger is equipped with the multiunit on the lateral wall of a pressure release section of thick bamboo, the one end intercommunication that the branched pipe of giving vent to anger kept away from a pressure release section of thick bamboo is equipped with the house steward of giving vent to anger, the one end that the house steward kept away from the branched pipe of giving vent to anger is equipped with an air collecting bag, the one end that the house steward is close to an air collecting bag of giving vent to anger is equipped with the check valve.

Furthermore, the outer wall of the rotating disc is provided with first threads, the inner wall of the pressure relief cylinder is provided with second threads, and the first threads are matched with the second threads.

Further, be equipped with first sealed pad on the inner wall of seal groove, first sealed pad is coniform setting, just the lower extreme of lifting disk is equipped with the sealed pad of second.

Furthermore, the cross section of the air outlet is in a trapezoidal arrangement.

Further, the upper end of the rotating disc is provided with a rotating handle.

The utility model with the structure has the following beneficial effects: this scheme lithium battery pressure relief device, through the use of the drive assembly that opens and shuts, conveniently control the intercommunication of gas outlet and a pressure release section of thick bamboo, give vent to anger the use of being managed through the multiunit, gaseous circulation in the battery cover plate has been accelerated, through the use of check valve and air collecting pocket, prevent that gas from spilling over and produce the pollution to the environment, remove in a pressure release section of thick bamboo through the rotary disk, can change compression spring's length, the thrust that the adjustment lifting disk received changes the critical pressure of pressure release.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a lithium battery pressure relief device according to the present invention;

FIG. 2 is a first diagram illustrating a first operating state of a lithium battery pressure relief device according to the present invention;

fig. 3 is a second usage state diagram of the lithium battery pressure relief device of the present invention.

The automatic air-conditioning device comprises a battery cover plate 1, a battery cover plate 2, a pressure relief assembly 3, an opening and closing driving assembly 4, an air outlet 5, a moving groove 6, a sealing groove 7, a sealing plate 8, a rack 9, a driving box 10, a driving motor 11, a gear 12, a pressure relief cylinder 13, a lifting disc 14, a rotating disc 15, a compression spring 16, a pressing column 17, an air outlet branch pipe 18, an air outlet header pipe 19, an air collection bag 20, a one-way valve 21, a first sealing gasket 22, a second sealing gasket 23 and a rotating handle.

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the lithium battery pressure relief device of the present invention comprises a battery cover plate 1, a pressure relief assembly 2 and an opening and closing driving assembly 3, wherein the pressure relief assembly 2 and the opening and closing driving assembly 3 are both disposed at an upper end of the battery cover plate 1, and a lower end of the opening and closing driving assembly 3 is disposed inside the battery cover plate 1; the middle part of the upper end of the battery cover plate 1 is provided with an air outlet 4, two opposite sides of the air outlet 4 are respectively provided with a moving groove 5 and a sealing groove 6, a sealing plate 7 is arranged in the moving groove 5, one end of the sealing plate 7 is movably arranged in the sealing groove 6, one end of the sealing plate 7 close to the sealing groove 6 is arranged in a conical shape, and the upper end of the sealing plate 7 far away from the sealing groove 6 is provided with a rack 8; the opening and closing driving assembly 3 comprises a driving box 9, a driving motor 10 and a gear 11, the driving box 9 is arranged at the upper end of the battery cover plate 1, the driving motor 10 is arranged inside the driving box 9, the gear 11 is sleeved outside an output shaft of the driving motor 10, and the gear 11 penetrates through the upper end of the battery cover plate 1 and is meshed with the rack 8; pressure release subassembly 2 is including a pressure release section of thick bamboo 12, lifter plate 13 and rotary disk 14, the upper end of battery apron 1 is located to a pressure release section of thick bamboo 12, the upper end of gas outlet 4 is located to a pressure release section of thick bamboo 12, the inside of a pressure release section of thick bamboo 12 is located to lifter plate 13 slidable from top to bottom, the inside upper end of a pressure release section of thick bamboo 12 is located to rotary disk 14, be equipped with compression spring 15 between the lower extreme of rotary disk 14 and the upper end of lifter plate 13, compression spring 15's both sides all are equipped with presses the compression post 16, the upper end of lifter plate 13 is located to the lower extreme of pressing post 16, the upper end of pressing post 16 link up rotary disk 14 and locate the outside of rotary disk 14.

The side wall of the pressure relief cylinder 12 is provided with air outlet branch pipes 17, the air outlet branch pipes 17 are arranged on the side wall of the pressure relief cylinder 12 in a penetrating manner, the air outlet branch pipes 17 are arranged on the side wall of the pressure relief cylinder 12 in a plurality of groups, one end of each air outlet branch pipe 17, which is far away from the pressure relief cylinder 12, is communicated with an air outlet main pipe 18, one end of each air outlet main pipe 18, which is far away from the air outlet branch pipes 17, is provided with an air collecting bag 19, and one end of each air outlet main pipe 18, which is close to the air collecting bag 19, is provided with a one-way valve 20; a first thread is arranged on the outer wall of the rotating disc 14, a second thread is arranged on the inner wall of the pressure relief cylinder 12, and the first thread is matched with the second thread; a first sealing gasket 21 is arranged on the inner wall of the sealing groove 6, the first sealing gasket 21 is arranged in a conical shape, and a second sealing gasket 22 is arranged at the lower end of the lifting disc 13; the cross section of the air outlet 4 is in a trapezoidal arrangement; the upper end of the rotating disc 14 is provided with a rotating handle 23.

When the lithium battery charging device is used specifically, before the lithium battery is charged, the driving motor 10 is started, the driving motor 10 drives the gear 11 to rotate, the gear 11 drives the rack 8 and the sealing plate 7 to move towards the direction far away from the sealing groove 6, so that the air outlet 4 is communicated with the pressure relief cylinder 12, when the air pressure in the battery cover plate 1 is too high, the air expands and pushes the lifting disc 13 to move upwards along the pressure relief cylinder 12, the second sealing gasket 22 can not only prevent the air from overflowing, but also play a role in protecting the lifting disc 13, so as to prevent the lifting disc 13 from being corroded by acid gas, the lifting disc 13 moves upwards to enable the compression spring 15 to contract until the lifting disc 13 crosses the air outlet branch pipe 17, at the moment, the air in the battery cover plate 1 is discharged through the air outlet branch pipe 17, so as to reduce the pressure in the battery cover plate 1, before the pressure relief, the rotating handle 23 can be stirred, so that the rotating handle 23 drives the rotating disc 14 to rotate, the length of the compression spring 15 is changed, the thrust force borne by the lifting disc 13 is adjusted, the critical pressure of pressure relief is changed, after the pressure relief is finished, the driving motor 10 rotates reversely, the sealing plate 7 seals the air outlet 4, and the lifting disc 13 moves downwards by applying pressure to the pressing column 16, so that residual air enters the interior of the machine bag through the air outlet branch pipe 17 and the air outlet main pipe 18.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a lithium cell pressure relief device which characterized in that: the battery cover plate opening and closing device comprises a battery cover plate, a pressure relief assembly and an opening and closing driving assembly, wherein the pressure relief assembly and the opening and closing driving assembly are arranged at the upper end of the battery cover plate, and the lower end of the opening and closing driving assembly is arranged in the battery cover plate; the middle part of the upper end of the battery cover plate is provided with an air outlet, two opposite sides of the air outlet are respectively provided with a moving groove and a sealing groove, a sealing plate is arranged in the moving groove, one end of the sealing plate is movably arranged in the sealing groove, one end of the sealing plate close to the sealing groove is arranged in a conical shape, and the upper end of the sealing plate far away from the sealing groove is provided with a rack; the opening and closing driving assembly comprises a driving box, a driving motor and a gear, the driving box is arranged at the upper end of the battery cover plate, the driving motor is arranged in the driving box, the gear is sleeved on the outer side of an output shaft of the driving motor, and the gear penetrates through the upper end of the battery cover plate and is meshed and connected with the rack; the pressure release subassembly is including a pressure release section of thick bamboo, lifting disk and rotary disk, the upper end of battery apron is located to a pressure release section of thick bamboo, the upper end of gas outlet is located to a pressure release section of thick bamboo, the inside of a pressure release section of thick bamboo can be located to the lifting disk from top to bottom slip, the inside upper end of a pressure release section of thick bamboo is located to the rotary disk, be equipped with compression spring between the lower extreme of rotary disk and the upper end of lifting disk, compression spring's both sides all are equipped with presses the compression leg, press the lower extreme of compression leg to locate the upper end of lifting disk, the upper end of pressing the compression leg link up the rotary disk and locate the outside of rotary disk.

2. The lithium battery pressure relief device of claim 1, wherein: be equipped with the gas outlet on the lateral wall of a pressure release section of thick bamboo and divide the pipe, the gas outlet is divided the pipe and is link up on locating the lateral wall of a pressure release section of thick bamboo, the gas outlet is divided and is equipped with the multiunit on the lateral wall of a pressure release section of thick bamboo, the one end intercommunication that the gas outlet was kept away from a pressure release section of thick bamboo that divides the pipe is equipped with the house steward of giving vent to anger, the house steward one end of keeping away from the gas outlet and dividing the pipe is equipped with an air collection bag, the one end that the house steward of giving vent to anger is close to an air collection bag is equipped with the check valve.

3. The lithium battery pressure relief device of claim 1, wherein: the outer wall of the rotating disc is provided with first threads, the inner wall of the pressure relief cylinder is provided with second threads, and the first threads are matched with the second threads.

4. The lithium battery pressure relief device of claim 1, wherein: be equipped with first sealed pad on the inner wall of seal groove, first sealed pad is coniform setting, just the lower extreme of lifting disk is equipped with the sealed pad of second.

5. The lithium battery pressure relief device of claim 1, wherein: the cross section of the air outlet is in a trapezoidal arrangement.

6. The lithium battery pressure relief device of claim 1, wherein: the upper end of the rotating disc is provided with a rotating handle.