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Battery voltage measurement device

  • US 6,639,408 B2
  • Filed: 11/02/2001
  • Issued: 10/28/2003
  • Est. Priority Date: 11/02/2000
  • Status: Expired due to Term
First Claim
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1. A battery voltage measurement device comprising:

  • a plurality of first switching sections, wherein each pair of adjacent first switching sections sequentially selects two output terminals of each of a plurality of battery blocks included in a battery pack;

    a level change section for changing a level of a battery voltage of each battery block which is input to the level change section via the first switching section;

    an A/D conversion section for performing an A/D conversion of battery voltage data output from the level change section; and

    a reference voltage control section for controlling an output of a reference voltage of the level change section according to the polarity of the battery voltage input to the level change section.

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