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US 9,071,056 B2Granted
Apparatus and method for managing battery cell, and energy storage system
AssigneeSamsung SDI Co., Ltd.
InventorsJong-Woon Yang, Eui-Jeong Hwang
Life of this patent
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Abstract
An energy storage system which balances cell voltages and a method of balancing cell voltages are disclosed. The system and method use a temperature of balancing resistors to determine a time for the balancing resistors to be selectively connected across battery cells so as to balance the battery cells.
Claims20
An energy storage system, configured to be connected to at least one of a power generating system, a grid, and a load, the energy storage system comprising:
- a battery system configured to store power received from at least one of the grid and the power generating system and/or to provide power to at least one of the grid and the load, the battery system comprising:
- a plurality of resistors for cell balancing, each resistor configured to be selectively connected across one battery cell of a plurality of battery cells, and
- a cell balancing controller configured to determine at time for the resistors to be connected across the battery cells according to a temperature of at least one of the resistors.
A method of balancing battery cell voltages, the method comprising:
- selectively connecting a plurality of resistors for cell balancing to a plurality of battery cells;
- and
- varying a time for the resistors to be connected across the battery cells according to a temperature of at least one of the resistors.
Dependencies are inferred from the claim text.