System and method to determine the loss in capacity and energy of a battery determining the output capacity of a battery

摘要

The system has a storage unit (16) storing a curve representing normal-operation voltage after time of a battery (2) before activating the battery relative to a calculated state of charge (SOC1) at different temperatures. A measurement unit (8) measures the voltage after the time with the temperature measured from integration of current traversing the battery, and the state of charge. A calculation unit (18) calculates a real state of charge (SOC2) from the voltage and the curve. A comparison unit (20) compares the real and calculated charges to determine capacity loss of the battery. An independent claim is also included for a method for determining capacity loss of a battery.