Secondary battery having constant-voltage device

Details Secondary battery having constant-voltage device Secondary battery having constant-voltage device

2005-08-19

2010-06-15

Assouad, Patrick J (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S136000, C324S427000

Reexamination Certificate

active

07737661

ABSTRACT:
Disclosed is a secondary battery having a constant-voltage device for preventing the secondary battery from being excessively overcharged. The breakdown voltage of the constant-voltage device is lower than the explosion or ignition voltage of the secondary battery, so the discharge operation may occur before the secondary battery is exploded or ignited even if the voltage of the secondary battery rises above the overcharge voltage, thereby protecting the secondary battery from explosion or ignition. The leakage current value of the constant-voltage device is less than 0.05% of the capacity value of the secondary battery under the maximum charge voltage of the secondary battery, or the breakdown voltage of the constant-voltage device is higher than the maximum charge voltage of the secondary battery. Thus, the constant-voltage device rarely generates the leakage current even if the secondary battery has been charged with the maximum charge voltage.

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PCT International Search Report for Application No. PCT/KR2005/002680; Date of Mailing International Search Report: Nov. 24, 2005 (All references cited in search report are cited above).
Supplementary European Search Report for Application No.: 05780549.1-2119; Dated: Apr. 18, 2008.

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