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

Claim 0:
1. An apparatus for controlling charging of a secondary battery pack that includes a plurality of secondary batteries and is coupled to a cooling device, the apparatus comprising:
a cell temperature measuring unit configured to measure a first temperature of a first secondary battery selected from the plurality of secondary batteries;
a coolant temperature measuring unit configured to measure a second temperature of a coolant flowing into the cooling device;
a current measuring unit configured to measure a charging current of the secondary battery pack;
a voltage measuring unit configured to measure a first terminal voltage of the first secondary battery and a second terminal voltage of a second secondary battery closest to the cooling device;
a minimum temperature estimating unit configured to:
estimate 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
determine the estimated third temperature as a minimum temperature of the secondary battery pack; and

a charging power adjusting unit configured to vary a charging power provided to the secondary battery pack according to the determined minimum temperature.