Method for improving health state of valve-regulated lead-acid storage battery based on resonance current pulses

Abstract

The invention relates to a method for improving the health state of a valve-regulated lead-acid storage battery based on resonance current pulses. The method comprises the following steps: firstly, calibrating the capacity of the valve-regulated lead-acid storage battery by utilizing cyclic test equipment, then testing by utilizing a low-frequency constant-potential electrochemical impedance spectroscopy, and calibrating the initial health state of the valve-regulated lead-acid storage battery according to the tested complex impedance response; then, utilizing a weak voltage signal generated by a signal generator to generate a resonance current pulse through a high-speed power amplifier so as to load the valve-regulated lead-acid storage battery, and then repeating capacity calibration and health state calibration; and finally, fitting the phase response and the frequency of the valve-regulated lead-acid storage battery measured in the step of calibrating the health state to obtain a radius parameter of the spherical electrode to quickly evaluate the health state of the valve-regulated lead-acid storage battery. According to the method, the health state of the valve-regulated lead-acid storage battery can be quickly detected by adopting a low-frequency constant-potential electrochemical impedance spectroscopy test, and the health state of the valve-regulated lead-acid storage battery can be quickly improved at low cost by lifting the valve-regulated lead-acid storage battery through the resonance current pulse, so that the method has great significance in improving the efficiency and the reliability of an electrical energy storage system.

Description

technical field [0001] The invention belongs to the field of electrical engineering, in particular to a method for improving the health state of a valve-regulated lead-acid battery based on resonance current pulses. Background technique [0002] In electric energy storage, the health status of valve-regulated lead-acid batteries is often improved by dismantling them and adding chemical reagents, which are difficult and expensive to operate. In addition, the valve-regulated lead-acid battery is a highly nonlinear and time-varying complex electrochemical system, and there are many parameters in the differential equation of the mechanism model related to the health state, which is difficult to solve and does not meet the requirements of practical engineering applications. Therefore, electrical methods based on external characteristics and non-disassembly are faster and cheaper. If you use reverse charging and add a pressure sensor, you can no longer consider the reaction mecha...

AI Technical Summary

Problems solved by technology

If you use reverse charging and add a pressure sensor, you can no longer consider the reaction mechanism inside the battery, but it is still time-consuming to improve the health of the battery with this method

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