Patent ID: 8768637
Filing Date: 2014-07-01
Classification: G01R

Abstract:
1. A method of supervising a battery for a load through a power inverter, comprising the steps of: (a) electrically connecting a DC detecting loop between said battery and said power inverter for detecting output current and voltage of said battery; (b) obtaining a first voltage value before said battery electrically discharges; (c) obtaining a second voltage value as well as an output current value of said battery after electrically discharging for a predetermined time unit of said battery; and (d) determining an available capacity of said battery in responsive to said first and second voltage values, a voltage value of said battery in an empty state which is a known value, said output current value of said battery, and time of electrical discharging via a microprocessor in accordance with a formula: said available capacity of said battery=[(said second voltage value−said voltage value of said battery in an empty state)/(said first voltage value−said second voltage value)]×said output current value of said battery×said time of electrically discharging.