CN-122008872-A - High-voltage mode switching control method and system for pure electric vehicle

CN122008872ACN 122008872 ACN122008872 ACN 122008872ACN-122008872-A

Abstract

The invention discloses a high-voltage mode switching control method and system for a pure electric vehicle, which are used for identifying a wake-up source, judging whether an effective high-voltage power-on request exists or not, executing high-voltage power-on operation corresponding to the effective high-voltage power-on request if the effective high-voltage power-on request exists, enabling the vehicle to enter a corresponding high-voltage mode, periodically checking whether a new effective high-voltage power-on request exists when the vehicle is in the current high-voltage mode, judging whether a condition of directly switching from the current high-voltage mode to a target high-voltage mode corresponding to the new effective high-voltage power-on request is met if the new effective high-voltage power-on request exists, and directly switching modes if the condition of directly switching is met. The invention can obviously reduce the switching time of the high-voltage mode, improve the response efficiency of the system, reduce the abrasion of actuators such as a high-voltage relay, prolong the service life, reduce the maintenance requirement and support the rapid integration of new functions.

Inventors

HU DI
Zhang kangjia
XU BIAO

Assignees

东风本田汽车有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. A high-voltage mode switching control method for a pure electric automobile is characterized by comprising the following steps of: identifying a wake-up source, and judging whether a valid high-voltage power-on request exists or not; if the effective high-voltage power-on request exists, executing high-voltage power-on operation corresponding to the effective high-voltage power-on request, and enabling the vehicle to enter a corresponding high-voltage mode; When the vehicle is in the current high-voltage mode, periodically checking whether a new effective high-voltage power-on request exists; if a new effective high-voltage power-on request exists, judging whether a condition of directly switching from the current high-voltage mode to a target high-voltage mode corresponding to the new effective high-voltage power-on request is met or not; and if the condition of direct switching is met, directly switching the mode to enable the vehicle to enter the target high-voltage mode.
2. The method for switching between high-voltage modes for a pure electric vehicle according to claim 1, wherein the identifying a wake-up source and judging whether a valid high-voltage power-on request exists comprises: Judging whether the awakening source is an effective awakening source, if so, sending an effective high-voltage power-on request, and if not, enabling the vehicle to be in a waiting dormant state; The effective wake-up source comprises at least one of driving, AC charging, DC charging, remote air conditioning, intelligent power supply, discharging to the outside and vehicle display modes.
3. The method for switching control over high-voltage modes of a pure electric vehicle according to claim 1, wherein the high-voltage power-on operation is a conventional high-voltage power-on operation or a charging preheating high-voltage power-on operation; the normal high-voltage power-on operation comprises the operation of closing a main positive relay and a pre-charging relay to pre-charge a high-voltage bus, and the operation of closing the main positive relay and opening the pre-charging relay after the voltage pre-charging of the high-voltage bus is finished; And the charging preheating high-voltage power-on operation is that when the temperature of the battery is lower than a temperature threshold value, the main negative relay and the pre-charging relay are closed to pre-charge the high-voltage bus, and when the charging pile is confirmed to be connected after the voltage pre-charging of the high-voltage bus is completed, the high-voltage relay for connecting the high-voltage bus and the battery is disconnected to preheat the battery.
4. The method for switching and controlling the high-voltage mode of the pure electric vehicle according to claim 3, wherein the high-voltage modes corresponding to the normal high-voltage power-on operation comprise a driving high-voltage mode, a remote air conditioner high-voltage mode, an intelligent power-on high-voltage mode, an external discharging high-voltage mode, a vehicle-expanding high-voltage mode, an AC charging high-voltage mode and a DC charging high-voltage mode; The high-voltage modes corresponding to the charging preheating high-voltage power-on operation comprise an AC charging preheating mode and a DC charging preheating mode; When the vehicle is in the charge warm-up high-voltage power-up operation, other high-voltage power-up requests than the battery warm-up completion exit are not responded.
5. The method for controlling high-voltage mode switching of a pure electric vehicle according to claim 1, wherein the condition for satisfying direct switching includes at least one of a wake-up source, a vehicle speed signal, a gear signal, a pedal signal, a mode enable signal, and a front hatch opening/closing signal.
6. The method for switching control of high-voltage mode of a pure electric vehicle according to claim 1, wherein if a new valid high-voltage power-on request exists when the current high-voltage mode is a driving high-voltage mode, a vehicle speed and gear state signal is determined, and conditions for switching from the other high-voltage modes except the driving high-voltage mode to the driving high-voltage mode include operating a pedal and a gear.
7. The method for switching control of high-voltage mode of a pure electric vehicle according to claim 1, wherein when the current high-voltage mode is a vehicle-unfolding high-voltage mode, only direct mutual switching with the AC charging high-voltage mode or switching to a high-voltage power-down state is allowed.
8. A high-voltage mode switching control system of a pure electric vehicle is characterized by comprising The wake-up source identification and request judgment module is used for identifying a wake-up source and judging whether an effective high-voltage power-on request corresponding to the effective wake-up source exists or not; The high-voltage power-on and power-off control module is used for responding to the effective high-voltage power-on request and controlling the related executor to execute the high-voltage power-on operation corresponding to the effective high-voltage power-on request; The request inspection module is used for periodically inspecting whether a new effective high-voltage power-on request exists when the vehicle is in the current high-voltage mode; The mode switching judging module is used for judging whether the condition of directly switching from the current high-voltage mode to a target high-voltage mode corresponding to the new effective high-voltage power-on request is met when the new effective high-voltage power-on request is patrolled and detected; and the mode switching execution module is used for directly switching the mode when the direct switching condition is met, so that the vehicle enters the target high-voltage mode.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the high-voltage mode switching control method for a pure electric vehicle according to any one of claims 1 to 7.
10. A computer program product comprising a computer program, characterized in that the computer program, when executed, causes the method for controlling the high-voltage mode switching of a pure electric vehicle according to any one of claims 1 to 7 to be performed.

Description

High-voltage mode switching control method and system for pure electric vehicle Technical Field The invention belongs to the technical field of vehicle control, and particularly relates to a high-voltage mode switching control method and system for a pure electric vehicle. Background With the continuous deepening of the intelligentization and networking degree of the pure electric vehicle, the application scene of the vehicle is continuously expanded, the working modes are increasingly diversified, and the intelligent and networking intelligent vehicle covers various states such as driving, charging, air conditioning and auxiliary functions. The high-low voltage power-on and power-off is used as a core basic function of vehicle operation, and the switching efficiency and reliability of the key links such as wake-up, initialization, wake-up source identification, power-on and power-off actions, mode switching and dormancy directly influence the user experience and the system stability. However, the prior art regards the upper and lower current flows of the different modes of operation as separate units isolated from each other, and when a switch from one high voltage mode to another is required, a high voltage power down operation needs to be performed to disconnect the high voltage bus, and then the high voltage power up flow is restarted. The switching mechanism causes a lengthy mode switching process, increases user waiting time, accelerates aging of actuators such as high-voltage relays due to frequent actions, remarkably reduces service life, and causes additional maintenance requirements. In addition, the cumbersome switching steps limit the rapid integration and flexible application of new functions, preventing further improvement of the vehicle intelligence level. Disclosure of Invention The invention aims to solve the defects in the background art and provides a high-voltage mode switching control method, a system, a computer-readable storage medium and a computer program product for a pure electric automobile, which can reduce the high-voltage mode switching time and improve the system response efficiency. The technical scheme adopted by the invention is that the high-voltage mode switching control method of the pure electric automobile comprises the following steps of: identifying a wake-up source, and judging whether an effective high-voltage power-on request exists, wherein the effective high-voltage power-on request corresponds to the effective wake-up source; If the effective high-voltage power-on request does not exist, the vehicle enters a waiting sleep state and waits for the effective wake-up source of the next time; When the vehicle is in the current high-voltage mode, periodically checking whether a new effective high-voltage power-on request exists; if a new effective high-voltage power-on request exists, judging whether a condition of directly switching from the current high-voltage mode to a target high-voltage mode corresponding to the new effective high-voltage power-on request is met or not; If the condition of direct switching is met, under the condition of keeping the high-voltage connection state, the mode switching is directly carried out without executing the high-voltage power-down action, so that the vehicle enters the target high-voltage mode; If no new effective high-voltage power-on request exists or the condition of direct switching is not met, when the high-voltage power-on request appears, executing high-voltage power-on operation, entering a waiting dormant state, and waiting for the effective wake-up source of the next time. A high-voltage mode switching control system of a pure electric vehicle comprises The wake-up source identification and request judgment module is used for identifying a wake-up source and judging whether an effective high-voltage power-on request corresponding to the effective wake-up source exists or not; The high-voltage power-on and power-off control module is used for responding to the effective high-voltage power-on request and controlling the related executor to execute the high-voltage power-on operation corresponding to the effective high-voltage power-on request; The request inspection module is used for periodically inspecting whether a new effective high-voltage power-on request exists when the vehicle is in the current high-voltage mode; The mode switching judging module is used for judging whether the condition of directly switching from the current high-voltage mode to a target high-voltage mode corresponding to the new effective high-voltage power-on request is met when the new effective high-voltage power-on request is patrolled and detected; and the mode switching execution module is used for directly switching the mode when the direct switching condition is met, so that the vehicle enters the target high-voltage mode. A computer-readable storage medium having stored thereon a computer program which, when executed by a processor