System and method for electric vehicle charging control with standby energy efficiency and safety protection

Abstract

This disclosure provides an electric vehicle charging control system and method with standby power saving and safety protection. After charging is complete, the charging device stops supplying charging and wake-up power, causing the vehicle controller to enter sleep mode to save energy. During sleep mode, the battery management module outputs a low-potential standby power. When the user starts the electric vehicle, the battery management module outputs a high-potential start-up power. Upon detecting this change in power potential, the charging device re-supplyes wake-up power to trigger the vehicle controller again, disabling the motor's power output. This disclosure prevents the vehicle from leaving the charging cable unplugged, providing both standby power saving and safety protection.

Claims

1. An electric vehicle charging control system with standby energy saving and safety protection, configured in an electric vehicle, the electric vehicle being detachably electrically coupled to a charging device, the charging device supplying a charging power supply and a wake-up power supply, the system comprising: One power battery; A battery management module is electrically connected to the power battery; The system also includes a vehicle controller electrically connected to the battery management module; wherein the vehicle controller is configured to: disable the power output of a motor in response to receiving the wake-up power from the charging device; and enter a sleep state in response to the charging device ceasing to supply the charging power and the wake-up power; wherein the battery management module is configured to: output a standby power during the sleep state; and wake up from the sleep state and output a starting power in response to a user performing a start operation on the electric vehicle; wherein, in response to the charging device detecting a switch from the standby power to the starting power, the charging device resupply the wake-up power to the vehicle controller to disable the power output of the motor again.

2. The electric vehicle charging control system as described in claim 1, wherein, The charging device is further configured to: in response to the charging device detecting that the standby power has changed to 0 volts, to resupply the wake-up power and the charging power.

3. The electric vehicle charging control system as described in claim 1, wherein, In response to the charging device detecting a switch from standby power to startup power, and further detecting that the voltage of the startup power is lower than a preset voltage threshold, the charging device resumes supplying the wake-up power and the charging power.

4. The electric vehicle charging control system as described in claim 1, wherein, The vehicle controller includes a motor controller, an automotive microprocessor, and an instrument controller. The motor controller and the instrument controller are electrically connected to the automotive microprocessor. In response to receiving the wake-up power from the charging device, the motor controller disables the power output of the motor.

5. The electric vehicle charging control system as described in claim 4 further includes an auxiliary battery electrically connected to the battery management module, the vehicle microprocessor, and the instrument controller, and adapted to supply power to the vehicle microprocessor and the instrument controller; wherein, In response to the battery management module receiving the charging power, the battery management module controls the auxiliary battery to be charged with the charging power.

6. The electric vehicle charging control system as described in claim 1, further comprising a main switch module electrically connected to the vehicle controller and the power battery; wherein, In response to the user's startup operation on the main switch module, the battery management module outputs startup power.

7. The electric vehicle charging control system as described in claim 1, wherein, The charging power supply is between 38 volts and 60 volts, the wake-up power supply is approximately 12 volts, the standby power supply is approximately 5 volts, and the startup power supply is greater than 30 volts.

8. A charging control method for an electric vehicle with standby power saving and safety protection, applied to an electric vehicle electrically coupled to a charging device, the method comprising the following steps: receiving a wake-up power supply from the charging device, and in response to the wake-up power supply, disabling the power output of a motor of the electric vehicle; and after a power battery of the electric vehicle is fully charged, entering a sleep state in response to the charging device stopping the supply of the wake-up power supply; and during the sleep state, outputting a standby power supply; wherein, In response to a user's start operation on the electric vehicle, the electric vehicle is awakened from its dormant state and outputs a starting power supply to trigger the charging device to resupply the wake-up power supply when it detects the switch from standby power to starting power, thereby disabling the motor's power output again.

9. The electric vehicle charging control method as described in claim 8, further comprising: In response to the charging device detecting a change from the standby power to 0 volts, the charging device resupply the wake-up power and a charging power.

10. The electric vehicle charging control method as described in claim 8, wherein, In response to the charging device detecting a switch from standby power to startup power, and further detecting that the voltage of the startup power is lower than a preset voltage threshold, the charging device resumes supplying the wake-up power and a charging power.

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