METHOD FOR DETERMINING AN AVAILABLE AMOUNT OF ENERGY OF A VEHICLE BATTERY FOR AN EMERGENCY PULSE, BATTERY MONITORING DEVICE AND MOTOR VEHICLE

An internal resistance value of a vehicle battery is determined from a measured ripple current. An actual energy content of the vehicle battery is determined from the internal resistance value and a predetermined battery characteristic curve. A temperature value of the vehicle battery is measured and an available amount of energy of the vehicle battery for an emergency pulse is determined based on the actual energy content, an actual discharge current of the vehicle battery and the measured temperature value.