热失控报警装置
By monitoring the aerosols in the early stages of lithium battery thermal runaway using optical detection methods and constructing a directional reflection optical path using a hyperboloid mirror system, the problem of the inability to provide timely early warning of lithium battery thermal runaway in existing technologies is solved, achieving millisecond-level real-time response and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUATING HEFEI POWER TECH
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot accurately detect and provide timely warnings of thermal runaway in lithium batteries within milliseconds, causing thermal runaway to spread throughout the entire battery pack and triggering safety accidents.
An optical detection method is used to monitor the aerosols released in the early stage of thermal runaway of lithium batteries by emitting light through a light source and capturing the changes in diffuse reflection light intensity of aerosols using a light signal receiver. A directional reflection light path is constructed by combining a hyperboloid mirror system to achieve millisecond-level real-time response.
It significantly advances the warning time window, reduces false alarm rate, simplifies system structure, reduces maintenance costs, achieves millisecond-level real-time response, and improves battery system safety.
Smart Images
Figure CN224518534U_ABST
Abstract
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; The light emitted by the light source is reflected by the third and fourth curved mirrors and then reaches the position of the first receiver.
2. A thermal runaway warning device according to claim 1, wherein, The third curved mirror and the fourth curved mirror are arranged symmetrically.
3. The thermal runaway warning device of claim 1, wherein, The third and fourth curved mirrors are parabolic mirrors, and the light source and the light signal receiver are respectively placed at the focal points of the third and fourth curved mirrors.
4. The thermal runaway warning device of claim 1, wherein, The second receiver is located on the side of the first receiver that is furthest from the light source.
5. The thermal runaway warning device of claim 1, wherein, The reflective surfaces of the third and fourth curved mirrors are coated with a metallic reflective film.
6. The thermal runaway warning device of claim 1, wherein, The first receiver, the second receiver, and the light source are located on the same straight line.
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.