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Battery having discharge state indication

  • US 6,507,196 B2
  • Filed: 12/22/2000
  • Issued: 01/14/2003
  • Est. Priority Date: 06/24/1998
  • Status: Expired due to Fees
First Claim
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1. A storage battery for supplying power to electrical devices, the battery comprising:

  • a battery vessel and a lid arranged on the vessel, several cells arranged in the battery vessel and electrically connected in series with each other, so that two end cells are formed, exterior terminal posts, electrically connected to the two end cells and extending from plates in an end cell through the lid or vessel to the exterior, a supervisor unit for determining the remaining electric capacity of the battery, the supervising unit being electrically connected to the terminal posts and arranged to measure a first voltage between the terminal posts, characterized in that the supervising unit is arranged to measure a second voltage from which a third voltage over part of at least one of the terminal posts is obtained, to calculate from the third voltage the current through the battery and to determine, from the calculated current and the first voltage, the remaining electric capacity of the battery.

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