CN-122008876-A - Vehicle power distribution control method and device based on double-time-window control time sequence

CN122008876ACN 122008876 ACN122008876 ACN 122008876ACN-122008876-A

Abstract

The invention relates to the technical field of whole vehicle control and discloses a vehicle power distribution control method and device based on a double-time window control time sequence, wherein the method comprises the steps of receiving a hard wire collision trigger signal and a collision message of a vehicle; the method comprises the steps of determining a collision area and a collision grade of a vehicle, inquiring branch action rules in a mapping table by taking the collision area and the collision grade as inquiry conditions to obtain a power distribution strategy, adopting a double-time window control strategy, executing power-off operation on a high-risk branch in a first time window, executing continuous power supply operation on a critical load in a second time window, and executing graded load reduction operation on a non-critical load.

Inventors

WANG CHAO
LI YAQUAN
CHEN DONGPING

Assignees

长春捷翼智能电子电器网络连接系统有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. A vehicle power distribution control method based on a double-time window control time sequence, the method comprising: receiving a hard wire collision triggering signal and a collision message of a vehicle; determining a collision area and a collision grade of the vehicle according to the hard wire collision triggering signal and the collision message; Inquiring branch action rules in a mapping table by taking the collision area and the collision grade as inquiry conditions to obtain a power distribution strategy corresponding to the current collision scene, wherein the mapping table is used for storing mapping relations among the collision area, the collision grade and a branch action rule set; And according to the power distribution strategy, a double-time window control strategy is adopted, the power-off operation is carried out on the high-risk branch circuits in a first time window, the continuous power-on operation is carried out on the critical loads in a second time window after the first time window, and the grading load-reduction operation is carried out on the non-critical loads.
2. The method of claim 1, wherein after receiving the hard wire crash trigger signal and the crash message of the vehicle, the method further comprises: Performing anti-shake filtering processing on the hard wire collision triggering signal and the collision message; if the hard wire collision trigger signal and the collision message are triggered successively in the same time window and all indicate that a collision event occurs, determining that the consistency check of the hard wire collision trigger signal and the collision message passes.
3. The method of claim 1, wherein determining the collision zone and the collision class of the vehicle based on the hard wire collision trigger signal and the collision message comprises: when the jump of the hard wire collision triggering signal is detected, determining a collision area by combining signals of front, rear, left and right collision sensors of the vehicle and a collision direction in a collision message, wherein the collision area comprises a front side, a rear side, a left side, a right side and a composite area; Analyzing the collision message to obtain the vehicle collision deceleration, and determining the collision grade according to the vehicle collision deceleration, wherein the collision grade comprises mild, moderate and severe.
4. The method of claim 1, wherein the performing a power down operation on the high risk branch during a first time window, performing a continuous power up operation on critical loads during a second time window after the first time window, and performing a staged load down operation on non-critical loads, comprises: determining a circuit to be cut off immediately as a high-risk branch by taking a first time window as a millisecond level, and completing power-off of the high-risk branch in the millisecond level time window; And taking the second time window as a second level, executing continuous power-preserving operation on the highest security level load, executing time-limited power-preserving operation on the second highest security level load, and executing immediate power-off operation on the lowest security level load, wherein the highest security level load is a life channel load, the second highest security level load is a security auxiliary load, and the lowest security level load is an entertainment load.
5. The method of claim 4, wherein, after performing a power down operation on the high risk branch in a first time window and a continuous power up operation on the critical load in a second time window after the first time window and a staged load down operation on the non-critical load in accordance with the power distribution strategy using a dual time window control strategy, the method further comprises: Monitoring the communication state of a CAN bus, if a communication signal is lost, determining CAN interruption, and only keeping the load with the highest safety level for continuous power conservation; if the effective working current exists in the branch after the power-off operation is monitored, determining that the power-off fails, and executing a limited number of retries; If the current rises after the power-off operation is monitored and reaches a preset current threshold value, determining that the current rebounds, and executing secondary cutting-off; and monitoring the SOC value of the battery, and if the monitored SOC value of the battery is lower than a preset SOC threshold value, determining that the SOC is too low, and closing the load of the next highest safety level in advance to keep electricity.
6. The method according to claim 1, wherein the method further comprises: recording event numbers, time stamps, collision areas, collision grades, mapping table version numbers, branch actions, feedback results, voltages, currents, SOCs and diagnostic fault codes, establishing logs by adopting a tamper-proof log signature mechanism, and storing the logs.
7. A vehicle power distribution control device based on a double-time window control time sequence, the device comprising: the receiving module is used for receiving a hard wire collision triggering signal and a collision message of the vehicle; The determining module is used for determining the collision area and the collision grade of the vehicle according to the hard wire collision triggering signal and the collision message; The query module is used for querying branch action rules in a mapping table by taking the collision area and the collision grade as query conditions to obtain a power distribution strategy corresponding to the current collision scene, and the mapping table is used for storing the mapping relation among the collision area, the collision grade and the branch action rule set; And the control module is used for executing power-off operation on the high-risk branch circuits in a first time window by adopting a double-time-window control strategy according to the power distribution strategy, executing continuous power supply operation on the critical loads in a second time window after the first time window, and executing grading load reduction operation on the non-critical loads.
8. An electronic device, comprising: A memory and a processor, the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions, thereby executing the vehicle power distribution control method based on the double-time window control sequence as claimed in any one of claims 1 to 6.
9. A computer-readable storage medium having stored thereon computer instructions for causing a computer to execute the vehicle power distribution control method based on the two-time window control timing according to any one of claims 1 to 6.
10. A computer program product comprising computer instructions for causing a computer to perform the vehicle power distribution control method based on the two-time window control timing of any one of claims 1 to 6.

Description

Vehicle power distribution control method and device based on double-time-window control time sequence Technical Field The invention relates to the technical field of whole vehicle control, in particular to a vehicle power distribution control method and device based on a double-time-window control time sequence. Background At present, new energy automobiles are rapidly popularized, the intelligent level of the whole automobile is continuously improved, the power distribution of the whole automobile bears the important task of supplying power in the aspect of guaranteeing the functions of the whole automobile, in the prior art, the whole automobile main relay or the fuse is generally adopted to realize total power failure after the collision of the automobile, however, the power failure mode of one cut of the mode can lead to the unusable key functions such as double flashing, door lock unlocking, emergency call and the like. Therefore, when a collision accident occurs to the vehicle, how to reasonably manage the power distribution of the vehicle becomes an important link of the whole vehicle safety design. Disclosure of Invention The invention provides a vehicle power distribution control method and device based on a double-time window control time sequence, which are used for solving the problem of how to reasonably manage vehicle power distribution. In a first aspect, the present invention provides a vehicle power distribution control method based on a dual time window control timing, the method comprising: receiving a hard wire collision triggering signal and a collision message of a vehicle; Determining a collision area and a collision grade of the vehicle according to the hard wire collision triggering signal and the collision message; Inquiring branch action rules in a mapping table by taking the collision area and the collision grade as inquiry conditions to obtain a power distribution strategy corresponding to the current collision scene, wherein the mapping table is used for storing mapping relations among the collision area, the collision grade and a branch action rule set; and according to the power distribution strategy, a double-time window control strategy is adopted, the power-off operation is carried out on the high-risk branch circuits in a first time window, the continuous power supply operation is carried out on the critical loads in a second time window after the first time window, and the grading load reduction operation is carried out on the non-critical loads. According to the invention, the collision area and the collision grade are accurately judged according to the hard wire collision trigger signal and the collision message, the branch action rules are accurately inquired according to the collision area and the collision grade, the power distribution strategy is obtained, the double-time window control strategy is adopted, the high-risk branch is cut off at the first time window, the secondary accident is blocked from the source, the key load is continuously supplied at the second time window, the key function is ensured to be available, the non-key load is reduced in a grading manner, the electric quantity is prevented from being continuously consumed by the non-key load, and compared with the traditional one-cut power failure strategy, the power distribution management reliability of the vehicle after the collision is improved. In an alternative embodiment, after receiving the hard wire crash trigger signal and the crash message of the vehicle, the method further comprises: performing anti-shake filtering processing on the hard wire collision triggering signal and the collision message; if the hard wire collision trigger signal and the collision message are triggered successively in the same time window and all indicate that a collision event occurs, determining that the consistency check of the hard wire collision trigger signal and the collision message passes. According to the invention, the anti-shake filtering processing is carried out on the hard wire collision triggering signal and the collision message, so that the interference caused by invalid signals is avoided, and the consistency check is carried out on the hard wire collision triggering signal and the collision message, so that the situation of misjudgment caused by a single signal is avoided, and the reliability is further improved. In an alternative embodiment, determining the collision area and the collision class of the vehicle according to the hard wire collision trigger signal and the collision message includes: When the jump of the hard wire collision triggering signal is detected, determining a collision area by combining signals of front, rear, left and right collision sensors of the vehicle and a collision direction in a collision message, wherein the collision area comprises a front side, a rear side, a left side, a right side and a composite area; analyzing the collision message to obtain the vehicle c