A cell-level point-to-point fire extinguishing system in a lithium battery pack

By installing prefabricated fire detection tubes and pressure sensors above the cell explosion vents of the lithium battery PACK, combined with a fire control system, the problems of untimely detection and inaccurate fire extinguishing in existing technologies are solved, achieving rapid fire extinguishing and secondary fire extinguishing at the cell level, and improving battery safety and maintenance convenience.

CN122399284APending Publication Date: 2026-07-17JIANGSU DAFU INTEGRATED EQUIP TECH CO LTD
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Patent Information

Application Number
CN202510061789.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-15
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing lithium battery packs, the composite detectors fail to detect fires in time, and the fire extinguishing agent is sprayed inaccurately, resulting in thermal runaway cells not being extinguished in time, and the maintenance costs are high.

Method used

A prefabricated fire detection tube and pressure sensor are installed above the explosion vent of the battery cell. Combined with the fire control system, the fire extinguishing agent is released through the bursting of the fire detection tube to extinguish the fire point by point and to carry out secondary fire extinguishing to prevent reignition.

Benefits of technology

It achieves rapid and accurate fire suppression at the cell level, reduces the risk of reignition, improves battery safety, and simplifies the maintenance process.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

A kind of cell level point-to-point fire extinguishing system in lithium battery PACK, it is related to lithium battery energy storage equipment technical field.The frame one side is PACK cavity, PACK cavity is provided with several lithium battery PACK by partition plate, the other side of frame is control cavity, fire control system is arranged in control cavity, fire control system is connected with fire control system on the lithium battery PACK, three-way connector, pressure sensor, prefabricated fire detection tube are arranged on the lithium battery PACK, three-way connector has electromagnetic valve, pressure sensor is connected with three-way connector, one end of three-way connector is connected with prefabricated fire detection tube, other two ends are connected with fire control pipeline.By setting prefabricated fire detection tube and pressure sensor above the cell vent, when thermal runaway occurs, the fire detection tube bursts or melts at this place, the fire extinguishing agent in the tube will be released at the crack, point-to-point fire extinguishing, and through fire control system, secondary fire extinguishing can be carried out, prevent battery afterburning, thereby effectively improve the safety of battery use.
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