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

Patent metadata

Field	Value
Publication number	US-12101052-B2
Application number	US-202217880690-A
Country	US
Kind code	B2
Filing date	Aug 4, 2022
Priority date	Dec 28, 2021
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

An electric vehicle control system and a control method, an electric vehicle power-on method, an electric vehicle power-off method, and an electric vehicle charging method are disclosed in this application. The control system includes a domain control unit controlling an electric vehicle, a current sampling unit sampling the current of a power battery and a motor of the electric vehicle and sending sampling signals to the domain control unit, and electrical device, driven by the power battery, sampling the current flowing through it and sending the sampling signals to the domain control unit. The domain control unit, according to the sampling signals sent by the electrical device and the current sampling unit, manages the power battery and controls a motor driver module and the electrical device. The structure of the control system and the control policy are simplified and the power-on and power-off time is shortened.

First claim

What is claimed is:

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.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Chen Xinwei
• Zhao Yuanmiao
• Xie Da
• Liang Yiqi
• Hou Yizhen
• Dan Zhimin

Classifications

• H02P1/029

  Restarting, e.g. after power failure · CPC title

• H02P21/22

  Current control, e.g. using a current control loop · CPC title

• B60L50/60

  using power supplied by batteries (in combination with fuel cells B60L50/75) · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title