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US 2020/0052502 A1Published application
Enhanced switched balancing network for battery pack
AssigneePowin Energy Corporation
InventorStu Statman
Life of this patent
Estimating the term…
Abstract
One or more of the present embodiments provide for a battery cell balancing system and strategy that delivers more efficient use of battery capacities as needed for different use cases. For example, a balancing circuit is provided to support targeted battery cell passive and active balancing according to a balancing strategy for the use cases. Further the balancing circuit allows for cell balancing to be performed while the battery cells are collectively being charged or discharged.
Claims20
A balancing circuit comprising:
- a voltage source coupled to the balancing circuit via a charge balancing relay;
- a load coupled to the balancing circuit via a discharge balancing relay;
- a plurality of cell group controllers, each of the plurality of cell group controllers configured to couple one of a plurality of cell groups to the balancing circuit via one of a plurality of cell group balancing relays;
- and
- a balancing controller configured to balance the plurality of cell groups by controlling the charge balancing relay, the discharge balancing relay and the plurality of cell controllers.
2 more elements
A balancing circuit comprising:
- a plurality of cell group stacks, each stack comprising:
- a plurality of cell groups;
- and
- a plurality of balancing controllers, each balancing controller configured to control a different circuit for balancing a different subset of the plurality of cell groups;
- a plurality of stack controllers, each stack controller configured to control a different subset of the plurality of balancing controllers.
2 more elements
A balancing circuit comprising:
- a plurality of cell groups;
- a plurality of cell group controllers, each cell group controller configured to control a different one of a plurality of cell balance relays for coupling a different cell group to the balancing circuit;
- a plurality of balancing controllers, each balancing controller configured to control charging and discharging for a different subset of the plurality of cell groups;
- a plurality of string controllers, each string controller configured to control a different subset of the plurality of balancing controllers;
- a battery management system configured to control power distribution in the balancing circuit by controlling the plurality of string controllers.
2 more elements
Dependencies are inferred from the claim text.