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Method and device for monitoring battery cells of a battery pack and method and arrangement for balancing battery cell voltages during charge

  • US 20060071643A1
  • Filed: 09/30/2005
  • Published: 04/06/2006
  • Est. Priority Date: 10/04/2004
  • Status: Active Grant
First Claim
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1. A battery monitoring device of a battery pack configured for powering a cordless power tool, comprising:

  • an integrated circuit connected to an microprocessor of the pack that is external to the integrated circuit, and connected to each of N battery cells of the pack, the integrated circuit configured to take, singly or sequentially, a sampled reading comprising one of an individual cell voltage or a total pack voltage for all cells in the pack, wherein the sampled reading is filtered in the integrated circuit prior to being read by the microprocessor.

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