CN208208858U - A kind of magnet-type balance explosion-proof valve - Google Patents

Abstract

The utility model provides a kind of magnet-type balance explosion-proof valve, including main body, inside is fixed with the first adsorption piece, protective cover, on the outside of main body, through main body middle through-hole to inside, the second adsorption piece being fixed on the inside of protective cover, fixed ring are equipped between main body outside on the inside of protective cover, it is fixed with the protection cover latch being through on the inside of main body, sealing ring is fixed in the card slot on the outside of main body, the position contacted on the outside of main body with protective cover；Film paper, it is fixed with main body, positioned at the inside of fixed ring, sealing strip, the surrounding being fixed on the inside of main body, steel disc is fixed with main body, is located on the outside of film paper, at least one in first adsorption piece and the second adsorption piece is permanent magnet, after being abnormal inside battery pack, can quick pressure release, balance external and internal pressure；After pressure release, under the action of the first adsorption piece and the second adsorption piece, protective cover can reset, and again by external seal in battery pack, completely cut off air.

Description

A magnet type balanced explosion-proof valve

technical field

The utility model belongs to the technical field of explosion-proof valves, in particular to a magnet-type balanced explosion-proof valve.

Background technique

The battery is the most critical component of new energy vehicles. In the production of batteries, the battery pack needs to be formed into a battery pack (PACK). After abnormal operation and temperature rise of the original components in the battery pack, and during driving The difference will cause a pressure difference inside and outside the battery pack, which will affect the safety of the battery, so the pressure difference needs to be eliminated.

The balance explosion-proof valve in the prior art is installed on the electromagnetic package. When the pressure is released, the protective cover is directly popped off to release the pressure. However, after the pressure is reduced, the protective cover cannot be reset, and the inside and outside of the battery pack cannot be isolated again.

Utility model content

The utility model aims at the problem that the protective cover cannot be reset after pressure relief in the prior art, and now provides a magnet type balance explosion-proof valve, which can be sealed again to isolate the air after the pressure is released to balance the pressure.

The utility model provides a magnet-type balanced explosion-proof valve, which comprises a main body, and a first adsorption part is fixed inside,

The protective cover is located on the outside of the main body and runs through the through hole in the middle of the main body to the inside. A second adsorption piece fixed on the inner side of the protective cover is arranged between the inner side of the protective cover and the outer side of the main body.

The fixing ring is fixed with the buckle of the protective cover penetrating to the inner side of the main body,

The sealing ring is fixed in the card groove on the outside of the main body, and is located at the position where the outside of the main body is in contact with the protective cover;

The membrane paper, fixed to the main body, is located on the inner side of the fixing ring,

The sealing strip is fixed around the inner side of the main body,

The steel sheet, fixed with the main body, is located outside the membrane paper,

At least one of the first adsorption part and the second adsorption part is a permanent magnet.

When the first adsorbent and the second adsorbent are adsorbed together, the protective cover and the main body are isolated from the inside and outside by the sealing ring. At this time, the small pressure difference can be adjusted through the membrane paper. When the pressure difference increases, the first When the first adsorbent is separated from the second adsorbent, the protective cover pops open for rapid pressure relief, and when the pressure drop is less than the suction force between the first adsorbent and the second adsorbent, the action of the first adsorbent and the second adsorbent Next, the protective cover returns to its original position, again separating the inside and outside of the battery pack.

Preferably, ventilation holes are provided on the surface of the steel sheet and the protective cover.

Preferably, the main body is an injection molded part.

Preferably, it also includes a copper sleeve, the copper sleeve is provided with threads, the copper sleeve is fixed to the main body through injection molding, and the threads face inward.

Preferably, the material of the sealing strip and the sealing ring is rubber or silica gel.

Preferably, the film paper is heat-melted and fixed on the main body.

Preferably, both the first adsorption part and the second adsorption part are permanent magnets, and the polarity directions are the same after being fixed.

Preferably, the first adsorption part is a permanent magnet, and the second adsorption part is stainless iron.

Preferably, the first adsorption part is stainless iron, and the second adsorption part is a permanent magnet.

Preferably, the first adsorbent and the second adsorbent are ring structures or block structures evenly distributed around the axis of the protective cover.

The beneficial effects of the utility model are:

1. After an abnormality occurs inside the battery pack, it can quickly release the pressure and balance the internal and external pressure;

2. After the pressure is released, under the action of the first adsorbent and the second adsorbent, the protective cover can be reset, and the inside and outside of the battery pack are sealed again to isolate the air.

Description of drawings

Fig. 1 is the structural representation of the explosion diagram of the utility model;

Fig. 2 is the structural representation of the sectional view of the utility model;

Fig. 3 is the structural representation of the utility model after assembly;

Among them, 1. Steel sheet, 2. Sealing strip, 3. Membrane paper, 4. Sealing ring, 5. Fixed ring, 6. Copper sleeve, 7. First adsorption part, 8. Main body, 9. Second adsorption part, 10. Protective cover.

Detailed ways

The technical solutions of the present invention are described in a non-restrictive manner below in conjunction with the accompanying drawings, in order for the public to better understand the technical content.

Example

As shown in Figures 1 to 3, a magnet-type balanced explosion-proof valve includes a main body 8, the main body 8 is an injection molded part, and a first adsorption part 7 is fixed on the inner side of the main body 8,

The protective cover 10 is located on the outside of the main body 8, and runs through the through hole in the middle of the main body 8 to the inside.

The fixed ring 5 is buckled and fixed with the protective cover 10 penetrating to the inner side of the main body 8. The fixed ring 5 is provided with at least two openings, and the bottom of the protective cover 10 is provided with corresponding protrusions to connect the opening of the fixed ring 5 with the protective cover. The protrusions of the cover 10 correspond to each other, and the protective cover 10 or the fixed ring 5 is rotated so that the fixed ring 5 is engaged with the protective cover 10 .

The sealing ring 4 is fixed in the slot on the outside of the main body 8, and is located at the position where the outside of the main body 8 contacts the protective cover 10. When the first adsorbent 7 and the second adsorbent 9 are adsorbed together, the protective cover 10 acts on the seal At this time, the inside and outside of the battery pack form a seal.

After the protective cover 10 is clamped and fixed with the fixing ring 5 , the protective cover 10 can slide relative to the main body 8 without falling off during the sliding process.

The membrane paper 3 is fixed with the main body 8 and is located inside the fixed ring 5. The membrane paper 3 is made of e-PTFE material film and fixed with the main body 8 by hot melting. The membrane paper 3 can separate the inside and outside to avoid direct contact between the inside and the outside. The sundries and water vapor in the air are isolated, and the internal and external pressure difference can be balanced by the membrane paper 3 when the internal and external pressure difference is less than 12KPa.

The sealing strip 2 is fixed around the inner side of the main body 8. The sealing strip 2 is ring-shaped or quadrangular. The sealing strip 2 is fixed around the inner side of the main body 8. When the entire balance explosion-proof valve is installed, the sealing strip 2 can connect the main body 8 with the installation A seal is formed between the bodies.

The steel sheet 1 is fixed with the main body 8 and is located outside the membrane paper 3, and the steel sheet 1 is provided with a plurality of through holes.

It also includes a copper sleeve 6, the copper sleeve 6 is provided with threads, the copper sleeve 6 is fixed with the main body 8 through injection molding, and the threads are facing inward. There is a through hole on the steel sheet 1, which is fixed with the copper sleeve 6 by fasteners. The steel sheet 1 is located on the outside of the membrane paper 3, which can protect the membrane paper 3 and avoid direct contact between the membrane paper 3 and other structures, and damage the membrane paper 3. , the through hole on the steel sheet 1 is used as a through hole for pressure relief, which can make the inside and outside of the battery pack communicate.

Wherein, the surface of the steel sheet 1 and the surface of the protective cover 10 are provided with ventilation holes. When the pressure difference is low, the pressure can be adjusted through the ventilation holes and the membrane paper 3 to avoid excessive pressure in the battery pack.

Wherein, at least one of the first adsorption part 7 and the second adsorption part 9 is a permanent magnet. At least one of the first adsorbing part 7 and the second adsorbing part 9 is a permanent magnet, and the other is a permanent magnet or a material that can be adsorbed as the adsorbing part. In this embodiment, the adsorbing part that can be adsorbed is stainless iron. In the actual process, one of them can be selected as a permanent magnet or both of them are permanent magnets according to the requirements of different pressure differences. Further, the first adsorption part 7 and the second adsorption part 9 can be ring structures or The block structure evenly distributed around the axis of the protective cover 10 can fix the first absorbing part 7 and the second absorbing part 9 to the main body 8 and the protective cover 10 by glue or injection molding.

When the first adsorbent 7 and the second adsorbent 9 are adsorbed together, the protective cover 10 and the main body 8 are isolated from the inside and outside by the sealing ring 4. At this time, the small pressure difference can be adjusted by the membrane paper 3. When the difference increases, the first adsorption part 7 is separated from the second adsorption part 9, and the protective cover 10 pops open for rapid pressure relief. When the pressure drop is less than the suction force between the first adsorption part 7 and the second adsorption part 9, the Under the action of the first absorbing part 7 and the second absorbing part 9, the protective cover 10 returns to its original position, and isolates the inside and outside of the battery pack again.

Wherein, the sealing strip 2 and the sealing ring 4 are made of rubber or silica gel, and the sealing strip 2 and the sealing ring 4 are sealed to isolate the inside and outside of the battery pack.

It should be understood that the above content including the accompanying drawings is not a limitation to the technical solution. In fact, under the same or similar principles, improvements to the technical solution include the shape, size, and material used for each part of the structure. , and equivalent replacements with substantially the same functional structures are all within the technical solution claimed by the utility model.

Claims (10)

1. A magnet-type balanced explosion-proof valve is characterized in that, comprising a main body, the inside is fixed with a first adsorbent, The protective cover is located on the outside of the main body and runs through the through hole in the middle of the main body to the inside. A second adsorption piece fixed on the inner side of the protective cover is arranged between the inner side of the protective cover and the outer side of the main body. The fixing ring is fixed with the buckle of the protective cover penetrating to the inner side of the main body, The sealing ring is fixed in the card groove on the outside of the main body, and is located at the position where the outside of the main body is in contact with the protective cover; The membrane paper, fixed to the main body, is located on the inner side of the fixing ring, The sealing strip is fixed around the inner side of the main body, The steel sheet, fixed with the main body, is located outside the membrane paper, At least one of the first adsorption part and the second adsorption part is a permanent magnet. 2. The magnet-type balanced explosion-proof valve according to claim 1, characterized in that: the surface of the steel sheet and the surface of the protective cover are provided with ventilation holes. 3. The magnet-type balanced explosion-proof valve according to claim 2, wherein the main body is an injection molded part. 4. The magnet-type balanced explosion-proof valve according to claim 3, further comprising a copper sleeve, the copper sleeve is provided with threads, the copper sleeve is fixed to the main body by injection molding, and the threads face inward. 5. The magnet-type balanced explosion-proof valve according to claim 4, characterized in that: the sealing strip and the sealing ring are made of rubber or silica gel. 6. The magnet-type balanced explosion-proof valve according to claim 4, characterized in that: the membrane paper is hot-melted and fixed on the main body. 7. The magnet-type balanced explosion-proof valve according to claim 4, characterized in that: both the first and second adsorption parts are permanent magnets, and the polarity directions are the same after being fixed. 8. The magnet-type balanced explosion-proof valve according to claim 4, characterized in that: the first adsorption part is a permanent magnet, and the second adsorption part is stainless iron. 9. The magnet-type balanced explosion-proof valve according to claim 4, characterized in that: the first absorbing part is stainless iron, and the second absorbing part is a permanent magnet. 10. The magnet-type balanced explosion-proof valve according to any one of claims 1 to 9, characterized in that: the first and second adsorbents are annular structures or evenly distributed block structures.