热失控报警装置

Abstract

本实用新型涉及热失控检测技术领域，本实用新型提供一种热失控报警装置，用于检测电池包内锂电池热失控状态。装置包括光源和至少一个光信号接收器，接收器与光源位于同一无阻挡空间内且避让光源直射光路。当电池热失控初期释放气溶胶颗粒时，光线在气溶胶表面发生漫反射，导致避让光路的接收器检测到散射光强度显著增强，经信号处理触发报警。针对热失控最早期的气溶胶特征产物(早于明火及温升)实现毫秒级检测，为防护措施争取关键时间窗口。仅需优化光源与接收器空间布局，无需复杂气路或采样系统，显著降低维护成本。该方案通过光学原理创新解决了传统热失控检测滞后性高、误报率大的行业痛点，为动力电池安全提供前置化保障。

Claims

1. A thermal runaway alarm device, characterized in that, The thermal runaway alarm device, applied to a battery pack, includes: light source; An optical signal receiver, comprising a first receiver and a second receiver, wherein the first receiver is located in the optical path of the light source, and the second receiver is located in the same unobstructed space as the light source and avoids the optical path of the light source.

2. A thermal runaway warning device according to claim 1, wherein, It also includes a prism, which is disposed in the optical path of the light source and refracts the light emitted by the light source to the first receiver.

3. A thermal runaway warning device according to claim 2, wherein, The second receiver is located between the prism and the light source, and the prism is located between the first receiver and the second receiver.

4. The thermal runaway warning device of claim 2, wherein, The prism's refractive surface is coated with an anti-reflective film.

5. A thermal runaway alarm device according to claim 2, characterized in that, The distance between the second receiver and the prism is less than the distance between the first receiver and the prism.

6. The thermal runaway warning device of claim 2, wherein, The prism is an equilateral triangular prism structure.

7. The thermal runaway warning device of claim 1, wherein, The optical signal receiver is a photodiode or a phototransistor.

8. The thermal runaway warning device of claim 1, wherein, The light source is an infrared laser light source.

9. The thermal runaway warning device of claim 1, wherein, The thermal runaway alarm device is integrated into the battery management system of the battery pack.

10. The thermal runaway warning device of claim 1, wherein, The thermal runaway alarm device is a plug-in structure, which is inserted into the battery pack.

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