A pressure stabilizing and pressure releasing valve and a battery pack thereof

By installing a pressure stabilizing and pressure relief valve at the bottom of the battery pack, the problems of unstable pressure control and poor discharge of high-temperature waste liquid were solved, achieving stability and efficient discharge of extinguishing agent flow, and improving the thermal runaway suppression capability and safety of the battery pack.

CN224501999UActive Publication Date: 2026-07-14QINGDAO SUNYFIRE TECHNOLOGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
QINGDAO SUNYFIRE TECHNOLOGE
Filing Date
2025-07-29
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The pressure relief valve of the existing battery pack has problems with unstable pressure control and poor discharge of high-temperature waste liquid, which leads to unstable extinguishing agent spray rate and retention of high-temperature waste liquid, affecting fire protection efficiency and safety.

Method used

Design a pressure stabilizing and pressure relief valve, including an opening and stabilizing part, which adopts a purely mechanical, magnetic mechanical or diaphragm mechanical structure to ensure that the valve remains stably open after opening, so as to achieve pressure control and waste liquid discharge. It is installed at the bottom of the battery pack to ensure stable fire extinguishing agent flow and effective discharge of high temperature waste liquid.

Benefits of technology

It achieves dynamic and stable control of the pressure inside the battery pack, ensuring the stability of the fire extinguishing agent spray flow and efficient discharge of waste liquid, thereby improving the thermal runaway suppression efficiency and system safety.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224501999U_ABST
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Abstract

The utility model provides a kind of pressure stabilizing pressure relief valve, including the valve body of hollow columnar with the pressure relief port of bottom end and the upper port and opening pressure stabilizing part with inner convex, wherein the opening pressure stabilizing part is arranged on upper port;Before valve is not opened, the opening pressure stabilizing part closes upper port, after valve is opened, the opening pressure stabilizing part opens upper port and stabilizes pressure;The effect of stabilizing pressure and not returning is had once the opening pressure stabilizing pressure relief valve of the utility model;The utility model provides a kind of pressure stabilizing pressure relief valve installation in battery pack bottom end, can significantly inhibit the risk of heat spread, maintain fire extinguishing agent efficient cooling and chemical inhibition ability, maximize fire extinguishing agent reserve utilization rate.
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