Battery pack charge control device and method

A battery pack charging control method comprising:

• a battery pack voltage acquiring step for acquiring a battery pack voltage in real time;
• a MCU sleep mode operation condition satisfaction determining step for determining whether an MCU sleep mode operation condition is satisfied;
• a constant voltage charging state determining step for determining whether the battery pack is in a constant voltage charged state, when the MCU sleep mode operation condition is satisfied as a determination result;
• an over-voltage protection level value changing step for changing an over-voltage protection level value to a higher value than a current value, when the battery pack is in the constant value charged state as the determination result;
• an MCU sleep mode allowing step for generating an MCU sleep mode allowing signal that is a signal for allowing a current operation mode of the MCU to be switched to the sleep mode, and delivering the MCU sleep mode allowing signal to the MCU;
• a charger connection recognizing step for recognizing whether an external charger is connected by recognizing a voltage value of the battery pack, which is increased due to the connection of the external charger;
• a trip signal necessity determining step for determining whether an over-voltage protection trip signal needs to be generated, which is a signal for waking up the MCU in operation in the sleep mode;
• and
• an over-voltage protection trip signal generating and delivering step for generating the over-voltage protection trip signal and deliver the over-voltage protection trip signal to the MCU in operation in the sleep mode to wake up the MCU, when it is determined that the over-voltage protection trip signal needs to be generated as the determination result.