| 摘要 |
A secondary battery protection circuit device for controlling charging of a secondary battery. The device has a first transistor connected in parallel to a power line. The power line connects the secondary battery to be charged to a battery charger, a second transistor connects to the second transistor, the clamping circuit normally clamping at or above ground level. The second and first transistor are turned ON when a residual voltage of the secondary battery is near 0 V and the clamping circuit does not operate. The result is a secondary battery protection circuit comprising a limited number of structural elements and consuming a reduced amount of power, and which is capable of charging a battery such as lithium-ion battery even when the residual voltage of the battery is at or near 0 V.
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