Patent ID: 11936233
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 7:
8. A method for controlling charging of a secondary battery pack that includes a plurality of secondary batteries and is coupled to a cooling device, the method comprising:
measuring a first temperature of a first secondary battery selected from the plurality of secondary batteries;
measuring a second temperature of a coolant flowing into the cooling device;
measuring a charging current of the secondary battery pack;
measuring a first terminal voltage of the first secondary battery and a second terminal voltage of a second secondary battery closest to the cooling device;
estimating a third temperature of a temperature estimation point of the second secondary battery from a lumped thermal model having a thermal resistance between two points selected from the temperature estimation point of the second secondary battery, a measurement point of the first temperature (“first temperature measurement point”) and a measurement point of the second temperature (“second temperature measurement point”), and the first temperature, the second temperature, the charging current, the first terminal voltage and the second terminal voltage input from the cell temperature measuring unit, the coolant temperature measuring unit, the current measuring unit, and the voltage measuring unit, and determining the estimated third temperature as a minimum temperature of the secondary battery pack; and
varying a charging power provided to the secondary battery pack according to the determined minimum temperature.