CN-121989841-A - Light commercial vehicle power management method, equipment and medium

CN121989841ACN 121989841 ACN121989841 ACN 121989841ACN-121989841-A

Abstract

The application discloses a light commercial vehicle power management method, equipment and medium, and belongs to the technical field of automobile electronic and electric architecture. The method comprises the steps of receiving a load control instruction through a vehicle-mounted CAN communication network, analyzing the load control instruction to control a corresponding high-side switch channel to drive a corresponding external load, collecting a state feedback signal of the high-side switch channel, judging whether the load channel has a fault, monitoring the state of a power supply of the whole vehicle, executing a load scheduling strategy according to a load priority list to control the switch-off of the load channel when the power supply of the whole vehicle is judged to be required to be subjected to electric energy balance management, and sending the state feedback signal, fault information and the switch state of the load channel to a whole vehicle controller and an instrument panel through the vehicle-mounted CAN communication network to be displayed and recorded. The intelligent diagnosis and networking system realizes the intellectualization, diagnosis and networking of power management, has the advantages of small volume and capability of being cooperated with the depth of the whole vehicle, and remarkably improves the attendance rate, maintainability and energy utilization efficiency of the vehicle.

Inventors

MA YONGJIE
CHANG JIUPENG
ZHAO BO

Assignees

潍柴新能源商用车有限公司

Dates

Publication Date: 20260508
Application Date: 20260316

Claims (10)

1. A method of power management for a light commercial vehicle, the method comprising: Receiving a load control instruction of a whole vehicle controller through a vehicle-mounted CAN communication network, wherein the load control instruction at least comprises a load identifier and an expected action; analyzing the load control instruction through the microcontroller so as to control a corresponding high-side switch channel and drive a corresponding external load; Collecting state feedback signals of each high-side switch channel, and judging whether a fault exists in a load channel corresponding to the high-side switch channel according to the state feedback signals; monitoring the state of a whole vehicle power supply, and executing a load scheduling strategy according to a preset load priority list when the power balance management is judged to be required to be executed so as to control the turn-off of a load channel; And sending the state feedback signals, the judged fault information of the load channel and the switching state of the load channel to the whole vehicle controller and the instrument panel for display and recording through the vehicle-mounted CAN communication network.
2. The method according to claim 1, wherein the determining whether the load channel corresponding to the high-side switch channel has a fault according to the status feedback signal comprises: Judging whether the load current indicated in the state feedback signal is lower than a preset current threshold value, and when the load current is lower than the preset current threshold value, determining that an open circuit fault exists in a load channel corresponding to the load current; Judging whether the load current indicated in the state feedback signal is higher than a preset overcurrent threshold, triggering a hardware protection circuit inside a high-side switch to turn off a load channel corresponding to the load current when the load current is higher than the preset overcurrent threshold, and confirming that a short circuit fault exists in the load channel corresponding to the load current.
3. The method according to claim 1, wherein monitoring the power state of the whole vehicle determines that power balance management is required, and specifically comprises: receiving a system state broadcast instruction of the whole vehicle controller through the vehicle-mounted CAN communication network, and judging that electric energy balance management needs to be executed if a flag bit representing an electric power tension state exists in the system state broadcast instruction; and/or the number of the groups of groups, And monitoring the voltage of the power input end of the microcontroller, and judging that the electric energy balance management is required to be executed if the voltage is lower than a preset voltage safety threshold and reaches a preset time.
4. The method of claim 1, wherein the performing a load scheduling policy to control the load channel to be turned off according to a preset load priority list specifically comprises: dividing the scheduling hierarchy into a high scheduling hierarchy, a medium scheduling hierarchy and a low scheduling hierarchy according to the preset load priority list; when the power balance management is judged to be needed to be executed, determining all hierarchical lists which are scheduled to execute the power balance management; According to the division of the scheduling hierarchy, sequentially sending turn-off instructions to high-side switches corresponding to the load channels of all the hierarchy lists from low to high; after the turn-off operation of the high-side switch of each level is executed, the state of the whole vehicle power supply is reevaluated; if the electric balance state is not recovered, the load channel of the next level is continuously turned off from low to high until the electric balance state is recovered.
5. The method according to claim 1, wherein before receiving the load control command of the vehicle controller through the vehicle CAN communication network, the method further comprises: Receiving configuration parameters sent by the whole vehicle controller through the vehicle-mounted CAN communication network, wherein the configuration parameters at least comprise overcurrent protection thresholds of all high-side switch channels; and setting the protection function of the corresponding high-side switch channel according to the configuration parameters.
6. The method according to claim 1, wherein the parsing, by the microcontroller, of the load control command to control the corresponding high-side switch channel to drive the corresponding external load, specifically comprises: extracting the load control instruction to obtain a target load identification and a switch action command; Determining a target high-side switch channel to be controlled according to a pre-stored mapping relation between load identifications and high-side switch channel addresses; Transmitting a digital control signal to a high-side switch chip of the target side switch channel through a serial peripheral interface bus, wherein the digital control signal comprises a switch action command; And controlling the power MOSFET integrated inside the high-side switch chip to be turned on or turned off according to the digital control signal so as to drive the external load to be powered on or powered off.
7. The method of claim 2, wherein after determining that a short circuit fault exists in the load channel corresponding to the load current, the method further comprises: Starting a preset delay timer; when the delay timer expires, the high-side switch channel is controlled to be conducted again; After the high-side switch channel is conducted, collecting a state feedback signal of the high-side switch channel again, and judging whether a short circuit fault still exists or not; If the fault is eliminated, clearing a fault mark of the high-side switch channel; If the fault still exists, the high-side switch channel is turned off again, and the permanent fault requiring manual intervention is marked.
8. The method according to claim 1, wherein the step of collecting the status feedback signal of each high-side switching channel comprises: Reading an analog voltage signal output by each high-side switch chip state pin through an analog-to-digital converter pin, and sampling and digitizing the analog voltage signal to obtain a current value of a high-side switch channel; reading digital status words generated by diagnostic circuits in each high-side switch chip through a digital input pin, wherein the digital status words comprise fault zone bits for indicating short circuit, over-temperature and load open-circuit faults; And integrating the current value of the high-side switch channel with a fault zone bit in the digital status word to generate a status feedback signal of the high-side switch channel.
9. A light commercial vehicle power management apparatus, comprising: A microcontroller; The controlled end of each high-side switch is connected with the microcontroller, and the power output end of each high-side switch is used for connecting a corresponding external load; The power input and management module is used for connecting a vehicle storage battery, a first output end of the power input and management module is connected with a power end of the microcontroller to provide working voltage, and a second output end of the power input and management module is connected with a power input end of each high-side switch; The vehicle-mounted CAN communication module is connected with the microcontroller and is used for realizing the interaction of instructions and state information between the microcontroller and the whole vehicle controller; The microcontroller is configured to perform a light commercial vehicle power management method as claimed in any one of claims 1 to 8.
10. A light commercial vehicle power management storage medium storing computer executable instructions capable of performing a light commercial vehicle power management method according to any one of the preceding claims 1-8.

Description

Light commercial vehicle power management method, equipment and medium Technical Field The application relates to the technical field of automobile electronic and electric architecture, in particular to a light commercial vehicle power management method, equipment and medium. Background In the light commercial vehicle (light truck) scene, vehicle power distribution, consumer control and circuit safety protection function, the core is realized by taking electromagnetic relay, fuse as the traditional electrical apparatus box of core. However, because the protection element of the traditional electrical box is a disposable fuse, the problems of overload or short circuit breaking, shutdown and manual checking and replacement exist, so that the vehicle is broken off during attendance and the maintenance cost is high, and the operation efficiency and the economy of the commercial vehicle are greatly affected. Secondly, because the traditional electric box executive component is an electromagnetic relay, the risk that arc, oxidation and even adhesion damage are easy to occur in the mechanical action of a contact exists, so that the long-term reliability of the system is insufficient, and the failure rate is increased along with the use frequency. Furthermore, because the pure hardware architecture is solidified, the problems that the real-time monitoring and remote diagnosis of the state of the line cannot be carried out exist, so that hidden faults such as circuit breaking, high resistance and the like are difficult to find, and the pre-maintenance capability is lost. Finally, because the intelligent energy management system cannot communicate with the whole vehicle network, the problem that the intelligent energy management system cannot receive the command of the upper controller to perform cooperative energy management exists, the vehicle cannot intelligently schedule loads under the working conditions of low electric quantity and the like, and the optimization space of the energy efficiency and the safety of the whole vehicle is limited. Disclosure of Invention In order to solve the technical problems in the background art, the embodiment of the application provides a light commercial vehicle power management method, equipment and medium, wherein the method comprises the steps of receiving a load control instruction of a whole vehicle controller through a vehicle-mounted CAN communication network; the load control command at least comprises a load identification and expected actions, the load control command is analyzed through the microcontroller to control corresponding high-side switch channels to drive corresponding external loads, state feedback signals of the high-side switch channels are collected, whether faults exist in the load channels corresponding to the high-side switch channels or not is judged according to the state feedback signals, the state of a whole vehicle power supply is monitored, when electric energy balance management is judged to be required to be executed, a load scheduling strategy is executed according to a preset load priority list to control the load channels to be turned off, and the state feedback signals, the judged fault information of the load channels and the switch states of the load channels are sent to the whole vehicle controller and an instrument panel through the vehicle-mounted CAN communication network to be displayed and recorded. In one example, judging whether a fault exists in a load channel corresponding to a high-side switch channel according to the state feedback signal specifically comprises judging whether load current indicated in the state feedback signal is lower than a preset current threshold, confirming that an open circuit fault exists in the load channel corresponding to the load current when the load current is lower than the preset current threshold, judging whether the load current indicated in the state feedback signal is higher than a preset overcurrent threshold, and triggering a hardware protection circuit in the high-side switch to shut down the load channel corresponding to the load current when the load current is higher than the preset overcurrent threshold, and confirming that a short circuit fault exists in the load channel corresponding to the load current. In one example, monitoring a state of a power supply of a whole vehicle, and determining that electric energy balance management needs to be executed specifically includes: The method comprises the steps of receiving a system state broadcast command of a whole vehicle controller through the vehicle-mounted CAN communication network, judging that electric energy balance management needs to be executed if a flag bit representing an electric power tension state exists in the system state broadcast command, and/or monitoring the voltage of a power input end of the microcontroller, and judging that electric energy balance management needs to be executed if the voltage is lower than a p