关键词: 光纤测温；AT89S52；动力电池；温度监测系统；仿真测试；故障定位

Abstract: In order to verify the feasibility that the principle of optical fiber temperature measurement can be used for temperature detection of new energy vehicle power battery, this article first analyzes the principle of distributed optical fiber temperature measurement, and then designs a distributed optical fiber power battery temperature measurement system with AT89S52 as the core, which is composed of main control chip, analog-to-digital conversion module, temperature display and alarm module, pulse width modulation module, power supply module, semiconductor laser and sensing fiber. After calculation, the pulse width and spatial resolution meet the measurement requirements. Finally, the expected effect has been achieved by compiling the corresponding program, building the simulation environment, and performing simulation tests on functions such as real-time temperature display, sound and light alarm, pulse width modulation, etc. The success-ful application of optical fiber temperature measurement technology in power battery temperature monitoring can achieve earlier and more accurately positioning the fault location to a certain extent, so as to reduce potential safety hazards.

Key words: Optical fiber temperature measurement; AT89S52; Power battery; Temperature monitoring system; Simulation test; Positioning the fault location