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Method for starting up a battery system having a DC voltage intermediate circuit

  • US 9,457,745 B2
  • Filed: 08/12/2011
  • Issued: 10/04/2016
  • Est. Priority Date: 09/20/2010
  • Status: Active Grant
First Claim
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1. A method for starting up a battery system having a battery, a DC voltage intermediate circuit that is connected to the battery, and a drive system that is connected to the DC voltage intermediate circuit, the battery having a plurality of battery modules that are connected in series, each battery module having a first input, a second input, a coupling unit, and at least one battery cell, the coupling unit being configured to, (i) in a first state, connect the at least one battery cell between the first input and the second input and to, (ii) in a second state, bridge the at least one battery cell by connecting the first input to the second input, the method comprising:

  • a) operating the coupling units of all of the plurality of battery modules in the second state to bridge the at least one battery cell of each of the battery modules by transmitting a corresponding control signal to the coupling units of all of the plurality of battery modules;

    b) operating the coupling unit of one of the plurality of battery modules in the first state to connect the corresponding at least one battery cell by terminating the transmission of the corresponding control signal to the coupling unit of the one of all of the plurality of battery modules; and

    c) repeating the step b) to connect the corresponding at least one battery cell of a further one of the plurality of battery modules at least until a voltage of the DC voltage intermediate circuit reaches a first desired operating voltage.

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