Method for detecting state of battery installed in vehicle, and vehicle-mounted battery-monitoring device

A vehicle device, comprising:

• a battery;
• a storage device;
• and
• at least one processor, wherein the storage device stores one or more programs, when executed by the at least one processor, the one or more programs cause the at least one processor to:
• determine whether current state of the vehicle device meets detection conditions;
• obtain vehicle speed and motor speed of the vehicle device;
• determine whether vehicle speed is within a vehicle speed range and the motor speed is within a motor speed range;
• detect a state of the battery if the vehicle speed is within the vehicle speed range and the motor speed is within the motor speed range;
• control an inverter to generate ripple current on the battery;
• measure ripple voltage of a plurality of battery cells;
• calculate voltage phase shift between the battery cells;
• and
• analyze whether the battery is normal according to the voltage phase shift between plurality of the battery cells.

A non-transitory storage medium having stored thereon instructions that, when executed by a processor of a computer device installed in a vehicle device, causes the processor to perform an analyzing method, wherein the method comprises:

• determining whether current state of the vehicle device meets detection conditions;
• obtaining vehicle speed and motor speed of the vehicle device;
• determining whether vehicle speed is within a vehicle speed range and the motor speed is within a motor speed range;
• and
• detecting a state of a battery if the vehicle speed is within the vehicle speed range and the motor speed is within the motor speed range;
• controlling an inverter to generate ripple current on the battery;
• measuring ripple voltage of a plurality of battery cells;
• calculating voltage phase shift between the battery cells;
• and
• analyzing whether the battery is normal according to the voltage phase shift between plurality of the battery cells.