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US 2019/0356140 A1Published application
Apparatus and method for battery module equalization
AssigneeLG Chem, Ltd.
InventorChang Hyun SUNG
Life of this patent
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Abstract
An apparatus and a method of equalizing a battery module supplies an equalization current to a battery module which is diagnosed to have abnormality via an equalization current supply circuit when an abnormality is generated in a state of charge (SoC) of one or more battery modules, and equalize the SoC of the one or more battery modules.
Claims18
An apparatus for equalizing a battery module, the apparatus comprising:
- one or more cell module controllers (CMCs) which are connected with one or more battery modules, respectively, and measure voltages of both ends of a connected battery module among the one or more battery modules, respectively;
- and
- a battery module controller (BMC) which calculates a state of charge (SoC) of each of the one or more battery modules based on the measured voltages of both ends of each battery module, and diagnoses an abnormality of each of the one or more battery modules based on the calculated SoC,
- wherein the BMC controls one or more switches included in the one or more CMCs, respectively, based on a location of the battery module which is diagnosed to have the abnormality among the one or more battery modules, forms an equalization current supply circuit that is a closed circuit including the BMC and the battery module which is diagnosed to have the abnormality, and supplies an equalization current to the battery module which is diagnosed to have the abnormality via the equalization current supply circuit.
1 more element
A method of equalizing a battery module by a battery module equalizing apparatus, the method comprising:
- measuring voltages of both ends of one or more battery modules connected to one or more cell module controllers (CMCs), respectively;
- diagnosing an abnormality of each of the one or more battery modules based on a state of charge (SoC) of each of the one or more battery modules calculated based on the measured voltages of both ends of each of the one or more battery modules;
- and
- controlling one or more switches included in the one or more CMCs, respectively, based on a location of the battery module which is diagnosed to have the abnormality among the one or more battery modules, and forming an equalization current supply circuit that is a closed circuit including an equalization current supplier that supplies an equalization current and the battery module which is diagnosed to have the abnormality.
1 more element
Dependencies are inferred from the claim text.