Method of fast-charging of a rechargeable battery
AssigneeSanyo Electric Co., Ltd.
InventorTakahiro Yamashita
Life of this patent
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Abstract
In the method of fast-charging of a rechargeable battery, full-charge state is determined on the basis of a peak battery voltage or a decrease ΔV in the battery voltage after the peak voltage. At the beginning of the fast-charge process, an initial battery voltage is measured. In case where the initial voltage is higher than a preselected voltage, the battery is fast-charged with a normal fast-charge current. In case where the initial voltage is lower than the preselected voltage, the battery is fast-charged with a restricted fast-charge current that is weaker than the fast-charge current.
Claims14
A method of fast-charging of a rechargeable battery, wherein full-charge state is determined on the basis of a peak battery voltage or a decrease, ΔV, in the battery voltage after the peak voltage, includes a step for detecting the battery's initial voltage at the beginning of the charging process, a step for fast-charging with a normal fast-charge current of the battery whose initial voltage is higher than a preset voltage and a step for fast-charging with a restricted fast-charge current which is smaller than the fast-charge current of the battery whose initial voltage is lower than the preset voltage.
A method of fast-charging of a rechargeable battery, wherein full-charge state is determined on the basis of a peak battery voltage or a decrease, ΔV, in the battery voltage after the peak voltage, includes a step for detecting the battery's initial voltage as well as the battery temperature at the beginning of the charging process, a step for fast-charging with a normal fast-charge current in the event of the initial voltage being higher than a preset voltage or the battery temperature being higher than a preset level and a step for fast-charging with a restricted fast-charge current that is weaker than the fast-charge current in the event of the initial voltage as well as the battery temperature being lower than the preset level.
Dependencies are inferred from the claim text.