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CHARGING METHOD AND DEVICE

  • US 20090278507A1
  • Filed: 05/06/2008
  • Published: 11/12/2009
  • Est. Priority Date: 05/06/2008
  • Status: Active Grant
First Claim
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1. A charging method for a battery, comprising:

  • A) enabling a charging device to charge the battery with a first charging voltage and a first charging current, the first charging voltage having a value that is increasing, the first charging current having a value that is constant and that is not greater than a discharge current value of the battery;

    B) when it is determined that the value of the first charging voltage is equal to a maximum charging voltage value of the battery, which is greater than a normal charging voltage value of the battery, enabling the charging device to charge the battery with a second charging voltage and a second charging current, the second charging voltage having a value that is equal to the maximum charging voltage value of the battery, the second charging current having a value that is decreasing;

    C) when it is determined that the value of the second charging current is not greater than a first predetermined threshold value, which is less than the discharge current value of the battery, enabling the charging device to charge the battery with a third charging voltage and the second charging current, the third charging voltage having a value that is equal to the normal charging voltage value of the battery; and

    D) when it is determined that the value of the second charging current is not greater than a second predetermined threshold value, which is less than the first predetermined threshold value, disabling the charging device from charging the battery.

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