Electric vehicle control system, control method, and computer-readable storage medium

1. An electric vehicle control system, comprising:

a domain controller to control an electric vehicle;

a current sampler to sample current of a power battery and a motor driver of the electric vehicle, and sending sampling signals to the domain controller;

an electrical structure, driven by its power battery, to sample current flowing through the electrical structure and send sampling signals to the domain controller; and

a switcher to turn on or off power supply circuits of the electrical structure and the motor driver,

wherein the domain controller manages the power battery and controls the motor driver and the electrical structure according to the sampling signals sent by the electrical structure and the current sampler,

the domain controller is connected to the electrical structure and the current sampler with signal wires,

the domain controller is connected to the switcher with hard wires, and

the domain controller is configured to:

issue a power-off instruction;

detect whether current of a major loop connected to a negative pole of the power battery is less than a preset value;

send a disconnection instruction to a motor drive loop relay connected to a positive pole of the motor driver to disconnect the motor drive loop; and

send the disconnection instruction to the major loop relay connected to the negative pole of the power battery to disconnect the major loop.

2. The electric vehicle control system according to claim 1 , further comprising:

a voltage sampler to sample voltage of the switcher and send the sampling signals to the domain controller,

wherein the domain controller performs on/off control of the switcher according to the sampling signals sent by the voltage sampler.

3. The electric vehicle control system according to claim 1 , wherein

the domain controller detects a state of the electrical structure and calculates test data to determine a control strategy of the electrical structure.

4. The electric vehicle control system according to claim 1 , wherein the electrical structure comprises an air pump controller, an oil pump controller, an air conditioner compressor, a water cooler, a voltage converter, and the motor driver.

5. An electric vehicle power-on method, the electric vehicle being provided with a domain controller for sampling signals from a power battery, a switcher and an electrical structure, and managing and controlling operations of the power battery, the switcher, and the electrical structure according to the sampling signals, comprising:

initializing, by the domain controller, after detecting a power-on request sign;

detecting, by the domain controller, whether a power-on condition is satisfied after completing the initializing;

sending, by the domain controller, a closing command to a major loop relay connected to a negative pole of the power battery when the power-on condition is satisfied, to connect to the major loop;

sending, by the domain controller, the closing command to a precharging loop relay of a motor driver to connect to the precharging loop to precharge the motor driver;

sending, by the domain controller, the closing command to a motor drive loop relay connected to a positive electrode of the motor driver, to connect to a motor drive loop;

sending, by the domain controller, a disconnect instruction to the precharging loop relay to end precharging, to complete power-on of the major loop; and

sending, by the domain controller, the closing commands to a water cooler relay, an electric defroster relay, an air conditioning warm-air blower relay, and an auxiliary drive relay, to connect to each high-voltage electrical structure, to complete power-on of the vehicle.

6. The power-on method according to claim 5 , wherein the domain controller detecting the power-on conditions comprises:

detecting whether the high-voltage electrical structure is turned off and is disable to output;

detecting whether there is any fault that prevents the vehicle from powering on; and

diagnosing contacts of each of the relays.

7. The power-on method according to claim 6 , wherein after diagnosing each of the relays, the domain controller reads information about the electrical structure stored inside the domain controller; and

the domain controller performs calculations according to the read information about the electrical structure and then performs high-voltage distribution for the electrical structure according to calculation results.

8. The power-on method according to claim 7 , wherein the information about the electrical structure read by the domain controller comprises information of the electrical structure to be turned on and rated power and weight of each electrical structure.

9. An electric vehicle power-off method, the electric vehicle being provided with a domain controller for receiving sampling signals from a power battery, a switcher, and an electrical structure, and managing and controlling operation of the power battery, the switcher, and the electrical structure according to the sampling signals, comprising:

issuing, by the domain controller, a power-off instruction;

detecting, by the domain controller, whether current of a major loop connected to a negative pole of the power battery is less than a preset value;

sending, by the domain controller, a disconnection instruction to a motor drive loop relay connected to a positive pole of a motor driver, to disconnect the motor drive loop; and

sending, by the domain controller, the disconnection instruction to the major loop relay connected to the negative pole of the power battery, to disconnect the major loop.