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Device for balancing an energy accumulator

  • US 10,033,200 B2
  • Filed: 03/05/2012
  • Issued: 07/24/2018
  • Est. Priority Date: 09/10/2009
  • Status: Active Grant
First Claim
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1. A device for balancing an energy accumulator in an onboard power supply system of a vehicle, the device comprising:

  • a cell stack comprising a series connection of a plurality of cells;

    a plurality of balancing circuits, each balancing circuit being respectively connected to voltage terminals of a cell and comprising a discharge resistor having a temperature dependent resistance characteristic; and

    a common heat sink on which each of the discharge resistors of the plurality balancing circuits are mounted, the common heat sink configured to thermally couple all of said discharge resistors,wherein the discharge resistor has a positive temperature coefficient (PTC) characteristic,wherein the common heat sink is configured with a cooling capacity that corresponds to less than all of the discharge resistors.

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