VOLTAGE CONTROL METHOD FOR SECONDARY BATTERY

摘要

A voltage control method for a secondary battery includes: calculating a voltage difference between a first voltage value as an initial voltage of the secondary battery and a second voltage value as a voltage of the secondary battery after being charged by constant-current charging during a predetermined time period; calculating an internal resistance of the secondary battery based on the voltage difference and a value of constant current applied in the constant-current charging; calculating an additional voltage based on the internal resistance and a value of constant current applied during voltage control, and calculating a target voltage by adding the additional voltage to a predetermined required voltage; controlling the voltage by charging the secondary battery with constant current until the target voltage is reached; and determining that the secondary battery is defective when the target voltage is not reached within a predetermined permissible time period while the voltage is controlled.

主权项

1. A voltage control method for a secondary battery, comprising:
calculating a voltage difference between a first voltage value that is measured as an initial voltage of the secondary battery and a second voltage value that is measured as a voltage of the secondary battery after being charged by constant-current charging during a predetermined time period; calculating an internal resistance of the secondary battery based on the voltage difference and a value of constant current applied to the secondary battery in the constant-current charging; calculating an additional voltage based on the internal resistance and a value of constant current applied to the secondary battery during voltage control, and calculating a target voltage by adding up a predetermined required voltage and the additional voltage; controlling the voltage of the secondary battery by charging the secondary battery with constant current until the voltage of the secondary battery reaches the target voltage; and determining that the secondary battery is a defective item when the voltage of the secondary battery does not reach the target voltage within a predetermined permissible time period while the voltage of the secondary battery is controlled.