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CN-224229346-U - Active explosion-proof valve

CN224229346UCN 224229346 UCN224229346 UCN 224229346UCN-224229346-U

Abstract

The utility model relates to an active explosion-proof valve which is characterized by comprising a valve seat, a valve cover, a connecting seat and a movable component, wherein the valve cover is arranged on the connecting seat, the movable component is arranged on the valve seat, the movable component is fixed with the connecting seat, an exhaust gap is formed between the connecting seat and the valve seat, a mounting plate is arranged on the valve seat, a power component is arranged on the mounting plate and is used for opening the exhaust gap, and when thermal runaway occurs in a battery pack, the power component starts to push the connecting seat to move, so that the exhaust gap is quickly opened.

Inventors

  • CUI MULIN

Assignees

  • 惠州市曙阳科技有限公司

Dates

Publication Date
20260512
Application Date
20250625

Claims (8)

  1. 1. The active explosion-proof valve is characterized by comprising a valve seat, a valve cover, a connecting seat and a movable assembly, wherein the valve cover is arranged on the connecting seat, the movable assembly is arranged on the valve seat, the movable assembly is fixed with the connecting seat, an exhaust gap is formed between the connecting seat and the valve seat, a mounting plate is arranged on the valve seat, a power assembly is arranged on the mounting plate, and the power assembly is used for opening the exhaust gap.
  2. 2. The active explosion-proof valve according to claim 1, wherein the movable component comprises a connecting rod and an elastic piece, a connecting hole matched with the connecting rod is formed in the valve seat, one end of the connecting rod penetrates through the connecting hole to be fixed with the connecting seat, one end of the elastic piece is fixed with the valve seat, the other end of the elastic piece is fixed with the connecting rod, and the power component is used for pushing the connecting rod to open the exhaust gap.
  3. 3. The active explosion-proof valve according to claim 2, wherein the valve seat is provided with a mounting groove, an inner sealing ring is arranged in the mounting groove, and the inner sealing ring abuts against the connecting seat to seal the exhaust gap when the movable assembly is in an initial state.
  4. 4. The active explosion-proof valve according to claim 1, wherein the movable assembly comprises a connecting rod, an elastic piece and a connecting sleeve, a connecting hole matched with the connecting sleeve is formed in the valve seat, the connecting sleeve is connected with the connecting hole in a sliding mode, the connecting rod is connected with the inner wall of the connecting sleeve in a sliding mode, one end of the connecting rod penetrates out of the connecting sleeve and then is fixed with the connecting seat, one end of the elastic piece is fixed with the inner wall of the connecting sleeve, the other end of the elastic piece is fixed with the connecting rod, and the connecting sleeve is fixed at the output end of the power assembly.
  5. 5. The active explosion-proof valve according to claim 4, wherein the connecting seat is in a shape of a circular truncated cone, the connecting rod is arranged at one end with a smaller diameter of the connecting seat, the valve seat is provided with an inner sealing ring, and the inner sealing ring is correspondingly contacted with the side wall of the connecting seat to seal the exhaust gap.
  6. 6. An active explosion-proof valve according to claim 2 or 4, wherein the valve cover is provided with vent holes, the connecting rod is provided with through holes, and the vent holes are communicated with the through holes.
  7. 7. An active explosion proof valve as set forth in claim 6, wherein a waterproof and breathable membrane is disposed within said valve cover to cover said through-hole.
  8. 8. An active explosion proof valve as set forth in claim 6, wherein a plurality of vent holes are provided in said valve seat, said plurality of vent holes being spaced radially of said valve seat.

Description

Active explosion-proof valve Technical Field The utility model relates to the technical field of explosion-proof valves, in particular to an active explosion-proof valve. Background The explosion-proof valve is an important valve, is widely applied to equipment which needs waterproof, ventilation and pressure relief in the industries of petrochemical industry, metallurgy, electric power, gas, automobiles and the like, and is usually arranged on a shell of the equipment. The explosion-proof valve has the core functions of preventing liquid and pollutants from invading, allowing gas molecules to pass through so as to balance pressure, and rapidly relieving pressure when the internal pressure of equipment or a system exceeds a safety threshold value to prevent explosion. Taking a battery as an example, in the use process of the battery, gas may be generated by internal chemical reaction, so that the internal pressure of the battery pack is increased sharply, and when the internal pressure exceeds a preset safety value, the valve of the explosion-proof valve arranged on the battery pack is opened rapidly to release the internal pressure, so that the explosion is avoided, and the safety of the battery pack, an automobile and personnel is protected. Most of the existing explosion-proof valves adopt spring control switches, when the air pressure in the equipment is larger than the yield force of the spring, the spring is compressed, so that the valve is opened to realize the pressure relief, the valve body of the explosion-proof valve is generally made of metal materials, the spring is generally arranged in the middle of the valve body, a bracket structure for connecting the spring and an opening and closing structure is required to be processed in the middle of the valve body part, for example, the explosion-proof valve disclosed in patent No. CN216590228U can only push the valve to be opened by the air pressure in the battery pack after the pressure in the battery pack exceeds a preset safety value, the response time of the opening mode is long, and the rapid pressure rise in the moment of thermal runaway cannot be dealt with, so that the space to be improved is still left. Disclosure of utility model Aiming at the defects in the prior art, the utility model aims to provide an active explosion-proof valve so as to solve the technical problems. The technical aim of the utility model is achieved by the following technical scheme that the active explosion-proof valve comprises a valve seat, a valve cover, a connecting seat and a movable assembly, wherein the valve cover is arranged on the connecting seat, the movable assembly is arranged on the valve seat and is fixed with the connecting seat, an exhaust gap is formed between the connecting seat and the valve seat, a mounting plate is arranged on the valve seat, a power assembly is arranged on the mounting plate, and the power assembly is used for opening the exhaust gap. Specifically, when the internal pressure of the battery pack is greater than the elastic force of the movable assembly, the air pressure of the battery pack pushes the connecting seat to move, at the moment, the exhaust gap is opened, and the air in the battery pack can be exhausted to the outside through the exhaust gap. When thermal runaway occurs in the battery pack, the power assembly starts to push the connecting seat to move, and the exhaust gap is quickly opened. The power component can be a power source capable of pushing the movable component to linearly move, such as an electric cylinder and an air cylinder. The movable assembly comprises a connecting rod and an elastic piece, wherein a connecting hole matched with the connecting rod is formed in the valve seat, one end of the connecting rod penetrates through the connecting hole to be fixed with the connecting seat, one end of the elastic piece is fixed with the valve seat, the other end of the elastic piece is fixed with the connecting rod, and the power assembly is used for pushing the connecting rod to open the exhaust gap. Specifically, when the internal pressure of the battery pack is greater than the elastic force of the movable assembly, the air pressure of the battery pack pushes the connecting seat to move, the exhaust gap is opened, the connecting rod moves along with the connecting seat, and the elastic piece is compressed. After the pressure release in the battery pack is completed, the elastic piece is restored to deform, the connecting rod drives the connecting seat to reset, and the exhaust gap is closed. When thermal runaway occurs in the battery pack, the power assembly starts to push the connecting rod to move, so that the connecting seat is pushed to realize quick opening of the exhaust gap. Optionally, a mounting groove is formed in the valve seat, an inner sealing ring is arranged in the mounting groove, and the inner sealing ring abuts against the connecting seat to seal the exhaust gap when the movable assembly is