The present invention relates to a charging awakening method, a battery management system and a vehicle. The battery management system comprises: a wakeup module generating a wakeup signal when the battery management system is in a sleep or off-mode and an external charging plug is connected to a charging interface; and a power management module connecting a battery module to power supply circuits between predetermined functional modules of the battery management system when the wakeup signal is received. According to the charging wakeup system provided by the present invention, when the external charging plug is connected in order to charge up a vehicle, the battery management system automatically wakes up to enable the battery management system to automatically enter into a normal operating mode while in an off or sleep mode, such that a process for charging a vehicle can be simplified without a need for a user waking up a battery management system through ignition to make operation easy and enhance experience of a user.
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