An external thermal runaway detection device

By employing a labyrinthine gas path and a matte black surface design in the thermal runaway detection device, the problems of inconvenient installation inside the sealed enclosure and light interference are solved, achieving an external detector that is easy to install, provides stable detection, and offers high accuracy.

CN224473571UActive Publication Date: 2026-07-07CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD
Filing Date
2025-07-16
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing thermal runaway detectors are inconvenient to install in sealed enclosures, and unstable airflow and ambient light interference can lead to missed and false alarms, affecting detection stability and accuracy.

Method used

An external thermal runaway detection device was designed. The inner wall of the lower shell is provided with inclined ridges and interlaced grooves to form a labyrinth-like gas path. The detection element is placed outside the sealed box. The black matte surface is combined to reduce light interference. The overall structure is integrally molded to improve sealing and detection accuracy.

Benefits of technology

It enables convenient installation and maintenance of the detection device, extends the smoke residence time, reduces missed and false alarms, improves detection stability and accuracy, and reduces production costs and assembly complexity.

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Abstract

The utility model belongs to the field of thermal runaway detection, specifically relates to a kind of external thermal runaway detection device, including upper cover, lower shell, control panel, detection plate and sealing ring one, control panel and detection plate are set in the inside of upper cover, upper cover is fixed with lower shell, the detection element on detection plate is inserted into the inside of lower shell, the inside wall of lower shell is circumferentially spaced apart and is provided with several convex strips, several convex strips are all relative to the radial inclination of lower shell Setting, the side surface of lower shell is provided with several through slots, which are communicated between the inside and the outside of lower shell, several through slots and several convex strips are staggered distribution along the circumference of lower shell, lower shell is used to be set in the mounting hole position of sealed box body, and the side surface of lower shell or upper cover is provided with annular boss for limiting the installation depth of lower shell, sealing ring one is used to be set between the edge of annular boss and mounting hole position.The utility model is more convenient and fast to overhaul and replace element, can prolong the time of smoke staying in the inside of lower shell, reduce environmental light interference, improve the stability and accuracy of detection.
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