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Charging device, battery device, and method

  • US 10,326,285 B2
  • Filed: 01/29/2016
  • Issued: 06/18/2019
  • Est. Priority Date: 02/03/2015
  • Status: Active Grant
First Claim
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1. A charging device comprising:

  • a charging unit configured to charge a battery device, wherein the battery device includes a memory configured to store first degradation information indicating a degradation state of the battery device;

    a voltage detection unit configured to detect a first voltage of the battery device before the charging unit starts charging the battery device and to detect a second voltage of the battery device when the charging unit is charging the battery device; and

    a control unit configured to perform control including;

    (a) receiving the first degradation information from the battery device before the charging unit starts charging the battery device,(b) determining, before the charging unit starts charging the battery device and by using the first voltage detected by the voltage detection unit, degradation progress information indicating a progress degree of the degradation state of the battery device,(c) calculating a differential voltage between the first voltage detected by the voltage detection unit and the second voltage detected by the voltage detection unit when the charging unit is charging the battery device,(d) generating, when the differential voltage is higher than or equal to a predetermined value and by using (i) the differential voltage, (ii) the degradation progress information, and (iii) the first degradation information, second degradation information indicating a degradation state of the battery device, and(e) transmitting the generated second degradation information to the battery device to cause the battery device to change the first degradation information stored in the memory to the second degradation information.

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