CN215933764U - Air release valve for power battery system - Google Patents

Abstract

The utility model relates to the technical field of power battery safety, in particular to a gas release valve for a power battery system, which comprises a gas release valve body, wherein one surface of the gas release valve body is connected with a battery box, a gas release sheet is arranged on the other surface of the gas release valve body, a first barrier net is arranged on the surface of the gas release valve body, which is connected with the battery box, the first barrier net is formed by winding stainless steel wires, and a ceramic fiber layer is arranged in the first barrier net. Aim at this snuffle valve has installed first separation net and second on being close to the side of battery box and has blockked the net, and through the separation that blocks the net, high temperature mars, granule etc. can stay at separation net surface or stay in the battery box inside, separation high temperature granule that can furthest avoids unexpected the emergence.

Description

Air release valve for power battery system

Technical Field

The utility model belongs to the technical field of power battery safety, and particularly relates to an air escape valve for a power battery system.

Background

When power battery system arouses the conflagration because of the monomer battery thermal runaway and arouses the conflagration, along with the stretching of thermal runaway between the monomer battery, the combustible gas in the battery package also can be more and more, and after the gas pressure reaches certain degree in the battery package, the piece that loses heart on the battery package can break to the internal and external pressure of balanced battery package avoids causing phenomenons such as explosion. However, when the power battery is out of control thermally, not only combustible gas is generated, but also a plurality of high-temperature particles and sparks are generated, the main components are melted aluminum foil, copper foil, negative electrode materials and the like, the sparks can ignite combustible electrolyte at any time, but the oxygen in the battery pack is limited to be less, so that the combustion in the battery pack is not obvious, and the high-temperature sparks, the particles and the like are also brought to the air release valve along with the leakage of the combustible gas.

At this moment, combustible gas takes place the diffusion outside the battery cell, and heat and combustible gas increase gradually, and although current snuffle valve can be discharged the combustible gas outside the package in the package on the power battery, reduces the risk of combustible gas burning in the package, but also can bring the mars granule of high temperature outside the package, easily ignite and close on vehicle and building, also can cause harm to other personnel.

Disclosure of Invention

The utility model provides an air escape valve for a power battery system, which aims to prevent spark in a battery box from being brought out of an air escape valve when an air escape sheet is broken and deflated, so that the potential safety hazard of the surrounding environment is caused.

The technical scheme adopted by the utility model is as follows: the utility model provides a power battery system is with disappointing valve, includes the disappointing valve body, disappointing valve body one side is connected with the battery box, set up the piece of letting out gas on the another side of disappointing valve body, set up first separation net in the one side that disappointing valve body and battery box are connected, first separation net has first filtration pore on the net.

Preferably, this internal second that sets up of snuffle valve separates the net, the setting of second separation net is in between first separation net and the piece of losing air, the second separates the net and has the second and cross the filtration pore, the aperture that the second was crossed the filtration pore is greater than the aperture that first was crossed the filtration pore.

Preferably, the first barrier net is made of stainless steel wires by winding, and a ceramic fiber layer is arranged in the first barrier net; the second separation net is made of stainless steel wires in a winding mode, and a ceramic fiber layer is arranged in the second separation net.

Preferably, the air release valve body comprises a filtering part and an air release part, the diameter of the filtering part is larger than that of the air release part, the first blocking net and the second blocking net are arranged in the filtering part, and the air release sheet is arranged in the air release part; the diameters of the first blocking net and the second blocking net are larger than the diameter of the air leakage sheet.

Preferably, the one side that snuffle valve body and battery box are connected sets up the mounting pin, the mounting pin is connected with the battery box cooperation.

Preferably, the mounting pins are L-shaped, and two mounting pins are arranged and are symmetrically arranged along the center of the air release valve body; the installation pin protrudes out of the surface of the air release valve body, and the bending part of the installation pin is arranged towards the circumferential direction of the air release valve body.

The utility model has the advantages that: according to the utility model, the first barrier net is arranged on the air escape valve, so that sparks and particles in the battery box can be adsorbed on the first barrier net or isolated inside the battery box and cannot leak outwards when the air escape valve works, and the problem that the sparks overflow the air escape valve to cause potential safety hazards to the surrounding environment is solved; according to the utility model, through the arrangement of the second barrier net, and the pores on the second barrier net are larger than those on the first barrier net, particles entering the air escape valve at an angle can be blocked by the second barrier net, and the condition that the air escape port is blocked can also be prevented.

Drawings

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

FIG. 2 is a schematic view of the structure of the position of the air release sheet of the present invention.

In the figure: 1-a gas escape valve body; 2-air release tablets; 3-a first barrier net; 4-a second barrier net; 5-mounting a pin; 6-a filter part; 7-air relief.

Detailed Description

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

The utility model provides a power is blowoff valve for battery system, includes blowoff valve body 1, 1 one side of blowoff valve body is connected with the battery box, blowoff valve body 1 and the inside intercommunication of battery box, set up gas leakage piece 2 on the another side of blowoff valve body 1, when the battery box is inside because of battery thermal runaway causes the conflagration, along with the stretching between the battery cell of thermal runaway, the combustible gas of battery box is also more and more, wait until the gas pressure reaches certain degree in the battery box, gas leakage piece 2 can break, with the inside and outside pressure of balanced battery box, avoid causing phenomenons such as explosion, gas leakage piece 2 is made by the aluminum alloy, install in the outside of blowoff valve body 1, with atmosphere direct contact, can break when the pressure of 2 both sides of gas leakage piece is greater than 3kpa, thereby the inside and outside pressure of balanced blowoff valve body 1; set up first barrier net 3 on the one side that snuffle valve body 1 and battery box are connected, first barrier net 3 is last to have first filtration pore, first barrier net 3 is made by the stainless steel wire winding, set up ceramic fiber layer in the first barrier net 3, through first barrier net 3 and ceramic fiber layer, can adsorb particulate impurity and mars in the battery box, perhaps block inside the battery box, can not leak to go in the environment on every side, avoid causing the potential safety hazard to the surrounding environment.

Set up the second in the release valve body 1 and block net 4, the second blocks to have the second on the net 4 to filter the hole, the second blocks net 4 and sets up first block net 3 and loses between the gas piece 2, the aperture that the second filtered the hole is greater than the aperture that first filtered the hole. Along with the continuation of thermal diffusion takes place, more and more high temperature mars, the granule is taken to snuffle valve body 1 department by combustible gas, first barrier net 3 can only the granule of separation perpendicular to separation piece, can be blockked by second barrier net 4 to the granule that the angle got into snuffle valve body 1 etc. because most granule can be blockked by first barrier net 3, so second barrier net 4 can use the mesh that the hole ratio is sparse 3 to first barrier net, separation high temperature granule that like this can furthest, also can prevent that the mouth of leaking gas from being blocked up.

The second barrier net 4 is made of stainless steel wires in a winding mode, and a ceramic fiber layer is arranged in the second barrier net 4.

The air release valve body 1 comprises a filtering part 6 and an air release part 7, the diameter of the filtering part 6 is larger than that of the air release part 7, the first barrier net 3 and the second barrier net 4 are arranged in the filtering part 6, and the air release sheet 2 is arranged in the air release part 7; the diameters of the first barrier net 3 and the second barrier net 4 are both larger than the diameter of the air leakage sheet 2. The size of the first barrier net 3 and the second barrier net 4 is slightly larger than that of the air leakage sheet 2, so that the smoke can be ensured to permeate but high-temperature large particles and sparks can not permeate, and the safety is improved.

And the air escape valve body 1 is provided with a mounting pin 5 on one side connected with the battery box, and the mounting pin 5 is connected with the battery box in a matching way. Through the mounting pin 5, the air escape valve body 1 can be directly clamped on the battery box, and the air escape valve is convenient to detach.

The mounting pins 5 are L-shaped, and two mounting pins 5 are arranged and are symmetrically arranged along the center of the air escape valve body 1; the mounting pin 5 protrudes out of the surface of the air release valve body 1, and the bending part of the mounting pin 5 is arranged towards the circumferential direction of the air release valve body 1. When the air release valve body 1 is installed, the installation pin 5 is directly clamped into the battery box, and then the air release valve body can be connected with the battery box.

The specific working mode is as follows: the air release valve body 1 is arranged on the battery box through the mounting pin 5, and sealant is coated around the air release valve body 1, so that the sealing connection of the air release valve body 1 is ensured; when an accident occurs, the internal air pressure of the battery box rises, so that the air release sheet 2 is broken, and the internal air of the battery box is released outwards, thereby ensuring the pressure balance between the inside and the outside of the battery box and placing the battery box to explode; when the inside gas of battery box leaks, along with granule and mars that gas injection took out, adsorbed by first barrier net 3, blockked, some granule and mars that are not blockked through the buffering of first barrier net 3, adsorbed by second barrier net 4, block to reach and block the condition that granule and mars leaked.

The above-mentioned embodiments are preferred embodiments, it should be noted that the above-mentioned preferred embodiments should not be considered as limitations to the utility model, and the scope of protection of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and these modifications and adaptations should be considered within the scope of the utility model.

Claims (6)

1. The utility model provides a power battery system is with disappointing valve, includes disappointing valve body (1), disappointing valve body (1) one side is connected with the battery box, set up air release piece (2), its characterized in that on the another side of disappointing valve body (1): the one side that snuffle valve body (1) and battery box are connected sets up first barrier net (3), first filter holes have on the first barrier net (3).

2. The blow-down valve for a power battery system according to claim 1, wherein: set up second barrier net (4) in snuffle valve body (1), second barrier net (4) set up first barrier net (3) and let out between gas piece (2), second barrier net (4) have the second and filter the hole, the aperture that the second filtered the hole is greater than the aperture that the first filtered the hole.

3. The blow-down valve for a power battery system according to claim 2, wherein: the first barrier net (3) is formed by winding stainless steel wires, and a ceramic fiber layer is arranged in the first barrier net (3); the second barrier net (4) is made of stainless steel wires in a winding mode, and a ceramic fiber layer is arranged in the second barrier net (4).

4. The relief valve for power battery systems according to any of claims 2-3, wherein: the air release valve body (1) comprises a filtering part (6) and an air release part (7), the diameter of the filtering part (6) is larger than that of the air release part (7), the first barrier net (3) and the second barrier net (4) are arranged in the filtering part (6), and the air release sheet (2) is arranged in the air release part (7); the diameters of the first barrier net (3) and the second barrier net (4) are larger than the diameter of the air leakage sheet (2).

5. The blow-down valve for a power battery system according to claim 4, wherein: the air release valve is characterized in that an installation pin (5) is arranged on one side, connected with the battery box, of the air release valve body (1), and the installation pin (5) is connected with the battery box in a matched mode.

6. The blow-down valve for a power battery system according to claim 5, wherein: the mounting pins (5) are L-shaped, and the two mounting pins (5) are symmetrically arranged along the center of the air escape valve body (1); the installation pin (5) protrudes out of the surface of the air release valve body (1), and the bending part of the installation pin (5) is arranged towards the circumferential direction of the air release valve body (1).

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