NTC temperature sensor for e-bike battery

Electric bicycles are convenient and environmentally friendly means of transportation. However, electric bicycles are also a safety hazard of combustion and explosion. According to the relevant departments, more than 90% of electric bicycle combustion and explosion originated from high temperature caused by the battery performance change, triggering a fire, seriously affecting the safety of people‘s lives and property.

The battery is the core component of an electric bicycle. People are in the driver‘s seat when driving electric bicycles, it is difficult to find the battery heat and other problems in time. In the process of driving or charging the electric bicycle, the battery failure or collision will lead to heating, and the battery is sealed in the small internal space of the electric vehicle is not conducive to heat dissipation, which is very easy to cause a fire. Therefore, a battery temperature monitoring system is needed to monitor the temperature. 

The dynamic temperature monitoring system of electric bicycle lithium battery temperature is composed of FPGA chip, data memory, battery protection switch, four NTC temperature sensors set in the battery pack of electric bicycle lithium battery, ambient temperature sensor placed on the surface of the battery box, and alarm placed on the surface of the battery box temperature monitoring system.

The NTC temperature sensor in the battery pack of e-bike lithium battery mainly monitors the real-time temperature change of the battery under different ambient temperatures in real time, and provides power-off alarm for the collected abnormal conditions. It avoids the safety hazards caused by the battery temperature monitoring defects in the electric bicycle driving and charging process, and improves safety.

The BT series NTC temperature sensor produced by Exsense is made of high precision NTC thermistor with epoxy resin encapsulation process and connected wires, which has the characteristics of small size, stable performance, high cost performance, high precision, high sensitivity and high reliability. It is suitable for temperature measurement of various automobiles, electric vehicles, small home appliances, etc.

Reference data.

CN114006064A "A dynamic temperature monitoring system based on lithium battery temperature of electric bicycle"