Power battery smoke sensor

By employing a labyrinth structure design combining infrared emitters and receivers in the power battery smoke sensor, the problems of high false alarm rate and poor environmental performance in existing technologies have been solved, achieving high sensitivity and long lifespan smoke detection.

CN224399940UActive Publication Date: 2026-06-23HUZHOU CHARI MACHINERY & ELETRICAL SCI
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Patent Information

Application Number
CN202521542260.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-23
Publication Date
2026-06-23
Estimated Expiration
2035-07-23

AI Technical Summary

Technical Problem

Existing smoke sensors in automotive power batteries are susceptible to humidity and airflow, resulting in a high false alarm rate. Furthermore, the use of Am241 radioactive sources is not environmentally friendly and makes it difficult to reliably detect gray and white smoke.

Method used

The system employs a combination of infrared transmitters and receivers, utilizing a maze structure to enhance scattering. Through a transmitter and receiver design with an angle greater than 90 degrees, combined with the maze structure and circuit board, smoke is collected from multiple directions. The smoke concentration is detected by infrared scattering, and signal processing is achieved using a DC-DC voltage regulator module, an MCU module, a thermistor, and a CAN transceiver module.

Benefits of technology

It improves the accuracy and reliability of smoke detection, reduces the false alarm rate, and achieves a smoke sensor design with long life (>50,000 hours) and low cost, suitable for automotive power battery environments.

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Abstract

The utility model relates to the technical field of smoke sensors, in particular to a power battery smoke sensor, which is characterized by comprising a shell, a circuit mainboard and a top cover, the shell is provided with a mounting surface, one side opposite to the mounting surface is provided with a side window, and the shell is provided with a transmitting seat, a receiving seat, a labyrinth structure and a bottom window. An infrared transmitting tube is clamped on the transmitting seat, an infrared receiving tube is clamped on the receiving seat, an included angle between the transmitting seat and the receiving seat is larger than 90 degrees based on transmitting and receiving routes, a labyrinth structure is arranged in an area between the transmitting seat and the receiving seat, and the bottom window is close to the labyrinth structure. The maze structure is covered with the main circuit board, a through hole right opposite to the bottom window is formed in the middle of the main circuit board, the top cover is connected to the shell in a buckled mode and covers the circuit mainboard, and a top window right opposite to the through hole is formed in the top cover. According to the utility model, an infrared transmitting and receiving route greater than 90 degrees is adopted, and a labyrinth structure is adopted, so that the sensing accuracy is improved.
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