| 摘要 |
A charging device is characterized by comprising the components of: a main power supply device which charges a secondary battery through power supply voltage; and an auxiliary power supply device which is parallelly connected with the main power supply device and charges the secondary battery through the power supply voltage, wherein the main power supply device performs charging in a constant-current control manner when the voltage of the secondary battery is lower than a first preset voltage, and performs charging in a constant-voltage control manner when the voltage of the secondary battery is higher than the first preset voltage. The auxiliary power supply stops charging when the voltage of the secondary battery is higher than a second preset voltage, wherein the second preset voltage is lower than the first preset voltage. |
