| 摘要 |
A battery charging system (100) is provided which comprises a charger (101) and a battery pack (102). The battery pack (102) comprises a battery cell or cells (150), memory means (140), temperature sensing means (147), and a high accuracy, high impedance voltage sensing means (112) that senses voltage directly at the battery cell terminals (151, 149). By sensing directly at the cell terminals (151, 149), charging error due to parasitic conductor impedances (132, 138) can be eliminated. The voltage sensing means (112) allows memory (140) and thermistor (147) data to be multiplexed, allowing the system to operate with four or fewer battery terminals.
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