Optical fiber Bragg voltage measuring method suitable for energy storage battery

Abstract

The invention discloses an optical fiber Bragg voltage measuring method suitable for an energy storage battery. An ASE broadband light source, an isolator, a splitter, a plurality of optical fiber Bragg strings, an F-P tunable filter, a sawtooth wave driving circuit, a photoelectric conversion circuit, an MCU and a passive equalization circuit are included. The BMS voltage measuring system has corrosion resistance, can be conveniently used at any position of various chemical batteries, such as the exterior and interior of a common lithium iron phosphate battery in the energy storage industry or the exterior and interior of a flow battery, and has the advantages of high precision, electromagnetic interference resistance and the like; STM32F103ZET6 is used as a main control chip, and a tunable F-P filter demodulation technology is combined to realize the voltage measuring system of the FBG sensor; the system is portable, small and exquisite, low in price and high in cost performance. The system can be conveniently integrated with an existing BMS system to replace a battery front-end acquisition chip AFE monopolized abroad for a long time.

Description

technical field [0001] The invention relates to an optical fiber Bragg voltage measuring method, in particular to an optical fiber Bragg voltage measuring method suitable for energy storage batteries, and belongs to the technical field of optical fiber sensing. Background technique [0002] Optical fiber Bragg sensor is a research hotspot in the field of optical fiber sensing in recent years. It is not subject to electromagnetic interference, high insulation performance, good explosion-proof performance, corrosion resistance and other advantages. [0003] The methods of fiber Bragg sensor demodulation mainly include interferometry, spectrometer method, wavelength tunable light source method, grating dispersion demodulation method, filtering method and so on. Among them, the tunable F-P filtering method has the advantages of high sensitivity and large tuning range. [0004] The existing BMS voltage measurement system uses the battery front-end acquisition chip AFE, which ha...

AI Technical Summary

Problems solved by technology

[0005] However, the existing optical fiber Bragg voltage measurement systems on the market are often expensive and bulky, and the main control chip is not a mainstream chip. The open source and portability of the chip are poor, and it is not convenient to integrate with the existing BMS system.

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