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Battery energy storage system and control system and applications thereof

  • US 9,847,654 B2
  • Filed: 12/08/2015
  • Issued: 12/19/2017
  • Est. Priority Date: 03/05/2011
  • Status: Active Grant
First Claim
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1. An electrical energy storage unit, comprising:

  • a battery pack controller configured to monitor a plurality of battery cells;

    a battery pack discharger, coupled to the battery pack controller, configured to individually discharge energy from each of the plurality of battery cells; and

    a battery pack charger, coupled to the battery pack controller, configured to charge the plurality of battery cells,wherein the battery pack controller receives a target balancing value and controls operation of the battery pack discharger and the battery pack charger to adjust a state-of-charge of each of the plurality of battery cells toward the target balancing value by at least;

    instructing the battery pack charger to charge the plurality of battery cells in response to the state-of-charge of at least one of the plurality of battery cells being below a first threshold related to the target balancing value, andinstructing the battery pack discharger to individually discharge one or more of the plurality of battery cells in response to the state-of-charge of the one or more battery cells being above a second threshold related to the target balancing value.

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