Method and apparatus for indicating battery state of hybrid car

The present method for indicating a battery state of a hybrid car detects DELTA V/ DELTA I which is a change value of voltage and current from a first state and a second state of a battery 1 being charged/discharged. The battery state indicating method determines whether the battery is charged/discharged in abattery protective state based on the DELTA V/ DELTA I and indicates that the battery protective state is established when the battery is charged/discharged in a protective state.