Battery quite discharge for rapid capacity evaluation based on multi-frequency measurement

Generally, the way of 0.1C current fully discharge battery capacity measurement, which is required for 10 hours discharge during this process, is time and energy consuming. This paper is to introduce a new method to measure battery capacity accurately in shorter time. This new method will use the technique of multi-frequency measurement for battery during discharge. This measurement will eventually gain different parameters based on Thevenin model. In this model, electrical capacitance can accurately reflect battery capacity. By analyzing the change of capacitance, it will accurately gain battery real capacity within 5 hours which is half of 0.1C current fully standard discharge time. It greatly reduces measurement time and reduces energy consumption about 50%.