Patent ID: 11860237
Assignee: HYUNDAI MOTOR COMPANY
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A system for vehicle battery life diagnosis, the system comprising:
a measuring unit installed inside a vehicle and configured to measure a state of charge change and a temperature of a vehicle battery;
a calculating unit which calculates battery relaxation voltage when a battery power line is cut off; and
a diagnosis unit which uses the state of charge change and temperature measured at the measuring unit and the battery relaxation voltage calculated at the calculating unit to diagnose battery life and status;
wherein the calculating unit measures an initial voltage at a battery output terminal when a battery power line is cut off, and an increased voltage at the battery output terminal after a certain time delay, then calculates battery relaxation voltage from a difference between the initial voltage and the increased voltage.