Patent ID: 11942612
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A battery system comprising:
a battery module that includes a plurality of cells;
a management unit that manages charging-discharging of the battery module and a temperature inside the battery module;
a cooling member that allows a cooling liquid to pass inside the cooling member and cools a part of the plurality of cells in the battery module;
a first temperature sensor that is placed on a surface of any one of the plurality of cells;
a second temperature sensor that measures an environmental temperature in the battery module or in a battery pack including the battery module; and
a third temperature sensor that measures a temperature of the cooling liquid,
wherein:
the management unit estimates a maximum temperature of an inside of one of the cells in the battery module based on a temperature measured in the battery module, and controls, during charging-discharging of the battery module, at least one of (i) a charging-discharging current of the battery module and (ii) cooling of the battery module to prevent the estimated maximum temperature from exceeding an upper limit temperature, and
the management unit retains a table or a function that is created in advance and defines relationships between a plurality of conditions and the maximum temperature, the plurality of conditions including a measured temperature of a surface of one of the cells, an environmental temperature in the battery module or in the battery pack, and a temperature of the cooling liquid, and estimates the maximum temperature using the table or the function.