System and method for cell balancing of battery pack
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorWooyeol Jeong
Life of this patent
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Abstract
A system and method of cell balancing of a battery pack using a cell balancing device of a battery pack is provided and includes a controller that detects an inter-cell voltage deviation in the battery pack. In addition, the controller is configured to determine whether to perform cell balancing on the battery pack and inactivate a relay connected with the battery pack. The controller is further configured to perform cell balancing in the battery pack.
Claims9
A method of cell balancing of a battery pack, using a cell balancing device of a battery pack, the method comprising:
- detecting, by a controller, an inter-cell voltage deviation in the battery pack;
- determining, by the controller, whether to perform cell balancing on the battery pack by comparing a magnitude of a control signal to a predetermined limit;
- inactivating, by the controller, a relay connected with the battery pack;
- and
- performing, by the controller, cell balancing in the battery pack.
A method of cell balancing of a battery pack, using a cell balancing device of a battery pack, the method comprising:
- detecting, by a controller, an inter-cell voltage deviation in a battery pack;
- determining, by the controller, a battery pack that requires cell balancing, using the detected voltage deviation;
- inactivating, by the controller, a relay connected with the determined battery pack and restricting charge and discharge of the determined battery pack;
- performing, by the controller, cell balancing on the cells in the determined battery pack;
- and
- connecting, by the controller, the relay and returning to a basic mode when a magnitude of a control signal is greater than a predeterminded limit,
- wherein the magnitude of the control signal is greater than the predetermined limit when an acceleration pedal is engaged over a threshold value and a requested output of an engine is greater than a predetermined engine output limit.
A system for cell balancing of a battery pack, comprising:
- a plurality of battery packs having a plurality of cells and connected in parallel;
- a relay connected between the battery packs;
- and
- a battery management system executed by a controller to determine whether to perform cell balancing on the battery pack based on an inter-cell voltage deviation of the battery pack and to connecting the relay and return to a basic mode when a magnitude of a control signal is greater than a predeterminded limit,
- wherein the magnitude of the control signal is greater than the predetermined limit when an acceleration pedal is engaged over a threshold value and a requested output of an engine is greater than a predetermined engine output limit, or when a current value input by regenerative braking of a motor is greater than a predetermined current value limit during braking of a vehicle.
Dependencies are inferred from the claim text.