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CN-224232854-U - Explosion-proof valve, battery pack and vehicle

CN224232854UCN 224232854 UCN224232854 UCN 224232854UCN-224232854-U

Abstract

The application relates to the technical field of batteries, in particular to an explosion-proof valve, a battery pack and a vehicle, wherein the explosion-proof valve comprises a first body, a second body and an air permeable member, the first body comprises a first surface, the first body is provided with a first pressure relief opening penetrating through the first surface, the second body comprises a second surface, the second body is provided with a second pressure relief opening penetrating through the second surface, the air permeable member is arranged between the first body and the second body and covers the first pressure relief opening and the second pressure relief opening, the air permeable member is respectively attached to the first surface and the second surface, the air permeable member is used for ensuring the tightness of the explosion-proof valve in a normal state, and when the battery pack is in thermal runaway, the air permeable member is exploded to enable high-temperature high-pressure gas to be discharged through the first pressure relief opening and the second pressure relief opening, so that the pressure relief function of the explosion-proof valve is realized, and the safety and the reliability of the explosion-proof valve are ensured. The explosion-proof valve is characterized in that the explosion-proof valve is arranged on the inner wall of the cylinder, the explosion-proof valve is arranged on the outer wall of the cylinder, and the explosion-proof valve is arranged on the outer wall of the cylinder.

Inventors

  • PENG XUANZHI
  • WANG LULU

Assignees

  • 浙江凌骁能源科技有限公司
  • 浙江零跑科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (10)

  1. 1. An explosion-proof valve, comprising: The first body comprises a first surface, the first body is provided with a first pressure relief opening, and the first pressure relief opening penetrates through the first surface; The second body comprises a second surface which is opposite to the first surface, the second body is provided with a second pressure relief opening which is arranged corresponding to the first pressure relief opening, and the second pressure relief opening penetrates through the second surface; the ventilation piece is arranged between the first body and the second body, and covers the first pressure relief opening and the second pressure relief opening, and the ventilation piece is respectively attached to the first face and the second face.
  2. 2. The explosion protection valve of claim 1, wherein said gas permeable member is heat and pressure encapsulated between said first body and said second body.
  3. 3. The explosion protection valve of claim 2, wherein said first body has a first melting point, said second body has a second melting point, said gas permeable member has a third melting point, said first melting point is less than said third melting point, and said second melting point is less than said third melting point.
  4. 4. The explosion-proof valve of claim 1, wherein the vent comprises a body portion and a connecting portion, the connecting portion surrounds the body portion, the body portion covers the first pressure relief opening and the second pressure relief opening, the connecting portion is respectively attached to the first face and the second face, and the roughness of the connecting portion is greater than that of the body portion.
  5. 5. The explosion-proof valve according to claim 4, wherein the connection portion has at least one through hole, and the first body and the second body on both sides of the through hole are bonded by hot pressing.
  6. 6. The explosion-proof valve according to claim 1, wherein, The first body is provided with a first mounting hole, the second body is provided with a second mounting hole, the first mounting hole is communicated with the second mounting hole, and the first mounting hole and the second mounting hole are arranged at intervals with the ventilation piece; the explosion-proof valve comprises a fastener, and the fastener penetrates through the first mounting hole and the second mounting hole.
  7. 7. The explosion-proof valve according to claim 6, wherein the number of the first mounting holes is plural, the number of the second mounting holes is plural, the plural first mounting holes are provided at intervals on the outer peripheral side of the first pressure relief port, and the plural second mounting holes are provided at intervals on the outer peripheral side of the second pressure relief port.
  8. 8. The explosion protection valve of claim 1, wherein said first face has a first receiving groove surrounding said first pressure relief vent, at least a portion of said venting member being located within said first receiving groove; The second face is provided with a second accommodating groove, the second accommodating groove surrounds the second pressure relief opening, and at least part of the ventilation piece is positioned in the second accommodating groove.
  9. 9. A battery pack, comprising: A housing having an explosion-proof hole; And an explosion proof valve as defined in any one of claims 1 to 8, the explosion proof valve cover sealing the explosion proof aperture.
  10. 10. A vehicle comprising an explosion-proof valve according to any one of claims 1 to 8, or a battery pack according to claim 9.

Description

Explosion-proof valve, battery pack and vehicle Technical Field The application relates to the technical field of batteries, in particular to an explosion-proof valve, a battery pack and a vehicle. Background The explosion-proof valve used for the battery pack is relatively expensive, and the mass and the volume of the explosion-proof valve are large, so that the requirement for the use place of the explosion-proof valve is not particularly strict, for example, the battery pack placed under the seat of the vehicle is high in cost and occupies excessive size space. Disclosure of utility model The embodiment of the application provides an explosion-proof valve, a battery pack and a vehicle, which aim to at least partially solve the technical problems. In order to achieve the above object, according to a first aspect of the present application, there is provided an explosion-proof valve comprising: the first body comprises a first surface, the first body is provided with a first pressure relief opening, and the first pressure relief opening penetrates through the first surface; The second body comprises a second surface which is opposite to the first surface, and is provided with a second pressure relief opening which is arranged corresponding to the first pressure relief opening and penetrates through the second surface; The ventilation piece is arranged between the first body and the second body, and covers the first pressure relief opening and the second pressure relief opening, and the ventilation piece is respectively attached to the first face and the second face. Optionally, the air permeable member is packaged between the first body and the second body in a hot pressing way. Optionally, the first body has a first melting point, the second body has a second melting point, the air permeable member has a third melting point, the first melting point is less than the third melting point, and the second melting point is less than the third melting point. Optionally, the ventilation member includes body portion and connecting portion, and connecting portion encircles in body portion, and body portion covers and seals first pressure release mouth and second pressure release mouth, and connecting portion laminate with first face and second face respectively, and the roughness of connecting portion is greater than the roughness of body portion. Optionally, the connecting portion has at least one through hole, and the first body and the second body on two sides of the through hole are bonded by hot pressing. Optionally, the first body is provided with a first mounting hole, the second body is provided with a second mounting hole, the first mounting hole is communicated with the second mounting hole, and the first mounting hole and the second mounting hole are arranged at intervals with the ventilation piece; The explosion-proof valve comprises a fastener, and the fastener penetrates through the first mounting hole and the second mounting hole. Optionally, the number of the first mounting holes is a plurality of, the number of the second mounting holes is a plurality of, the plurality of first mounting holes are arranged on the outer periphery side of the first pressure relief opening at intervals, and the plurality of second mounting holes are arranged on the outer periphery side of the second pressure relief opening at intervals. Optionally, the first surface has a first accommodating groove, the first accommodating groove surrounds the first pressure relief opening, and at least part of the ventilation member is located in the first accommodating groove; The second face is provided with a second accommodating groove, the second accommodating groove surrounds the second pressure relief opening, and at least part of the ventilation piece is positioned in the second accommodating groove. According to a second aspect of the present application, there is provided a battery pack comprising: A housing having an explosion-proof hole; and the explosion-proof valve is used for sealing the explosion-proof hole by the explosion-proof valve cover. According to a third aspect of the present application, there is provided a vehicle comprising the explosion-proof valve described above, or the battery pack described above. The embodiment of the application provides an explosion-proof valve, which comprises a first body, a second body and an air permeable piece, wherein the first body comprises a first surface, the first body is provided with a first pressure relief opening, the first pressure relief opening penetrates through the first surface, the second body comprises a second surface opposite to the first surface, the second body is provided with a second pressure relief opening corresponding to the first pressure relief opening, the second pressure relief opening penetrates through the second surface, the air permeable piece is arranged between the first body and the second body and covers the first pressure relief opening