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System for supplying power to an apparatus and method for the assessment of the lifetime and capacity of a power-storage device

  • US 5,552,953 A
  • Filed: 01/17/1995
  • Issued: 09/03/1996
  • Est. Priority Date: 01/29/1994
  • Status: Expired due to Fees
First Claim
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1. An apparatus for assessing the lifetime and capacity of a power storage means for supplying power to a device, said apparatus comprising:

  • a first measuring means for measuring a first electrical quantity of the power storage means;

    a time determining means for determining a time on reaching a first level of the first electrical quantity characterized by;

    a second measuring means for measuring a second electrical quantity of the power storage means; and

    a comparator means for comparing the second electrical quantity relative to the determined time with a stored typical time characteristic of the second electrical quantity;

    whereby the first electrical quantity either is a voltage or a current, the second electrical quantity then either being the current or the voltage respectively; and

    the measurements being applicable during a supply of the device by the power storage means.

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