Chroma Ate Inc.

Chao-Hsu Chen

Chih-Ming Tsai

Han-Chou Liao

Yao-Nan Wang

Wen-Chieh Wu

Chung-Yu Siang

A method is provided for testing a semi-finished battery cell. The semi-finished battery cell is charged with a constant current when a voltage difference between the first conductor and the second conductor is less than a voltage threshold. The semi-finished battery cell is charged with a constant voltage when the voltage difference between the first conductor and the second conductor is equal to or larger than the voltage threshold. An overall electric quantity is obtained after a default time period, wherein the overall electric quantity is an electric quantity charged to the semi-finished battery cell with the constant current during the default time period. Accordingly, an insulation related to electrodes of the semi-finished battery cell is determined as poor when the overall electric quantity is larger than an electric quantity threshold.

Method for testing semi-finished battery cell

The invention provides a battery charging and discharging apparatus and method. The battery charging and discharging apparatus comprises a power source and a plurality of charging and discharging module. The charging and discharging module comprises a current-limiting transistor, a current-limiting resistor, a charging controlling unit, and a discharging controlling unit, wherein both the charging controlling unit and the discharging controlling unit are of battery voltage tracking types. When the charging and discharging module charges a battery, the voltage across two ends of the current-limiting transistor and the current-limiting resistor connected in series is limited to a fixed value by the charging controlling unit. When the battery discharges, the voltage across two ends of the current-limiting transistor and the current-limiting resistor connected in series is limited to a fixed value by the discharging controlling unit. Besides, the discharging controlling unit feedbacks the discharging energy from the battery to the power source.

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Taoyuan, Taiwan

Chao-Hsu Chen