Control method for realizing multi-path high-voltage up-down electric decoupling based on different scenes

Abstract

The invention relates to a control method for realizing multipath high-voltage upper and lower electric decoupling based on different scenes, and the method comprises the following steps: S1, combing different upper and lower high-voltage scenes, and formulating an upper high-voltage time sequence diagram and a lower high-voltage time sequence diagram in each scene; s2, according to the high-voltage topology, dividing the high-voltage electric appliance of the whole vehicle into a plurality of sub-state machines; dividing the state of each sub-state machine; s3, formulating an on-machine high-voltage enable signal and an off-machine high-voltage enable signal of each sub-state machine; s4, finishing a high-pressure process; s5, the whole vehicle high-pressure lowering process is achieved; the priority of the lower high pressure is higher than that of the upper high pressure, and when the upper high pressure and the lower high pressure are met at the same time, the lower high pressure is executed preferentially. According to the control method for realizing multi-path high-voltage up-down electric decoupling based on different scenes, the up-down high-voltage electric decoupling problem under the working conditions is solved, and the function of realizing multi-path high-voltage up-down electric decoupling based on different scenes is realized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of control methods, in particular to a control method for realizing multi-path high-voltage power-on and power-off decoupling based on different scenes. BACKGROUND

[0002] With the continuous progress of society, the trailer industry has developed rapidly. In the trailer industry, various different high-voltage power-on and power-off controls are usually involved. The mainstream high-voltage power-on and power-off control is the whole vehicle high-voltage power-on and power-off, and in some common working conditions, such as the charging scene under the whole vehicle high-voltage state, the control problem of high-voltage power-on and power-off cannot be reasonably solved, which brings great trouble to the operation of the whole vehicle. SUMMARY

[0003] The technical problem to be solved by the application is to solve the problems in the above background art, and to provide a control method for realizing multi-path high-voltage power-on and power-off decoupling based on different scenes, to solve the high-voltage power-on and power-off problem in the above working conditions, and to realize the function of multi-path high-voltage power-on and power-off decoupling based on different scenes.

[0004] The technical scheme adopted by the application to solve the technical problem is: a control method for realizing multi-path high-voltage power-on and power-off decoupling based on different scenes, comprising the following steps: S1, sorting different high-voltage power-on and power-off scenes, and formulating the high-voltage power-on and power-off timing diagram under each scene; S2, according to the high-voltage topology, dividing the high-voltage electrical appliances of the whole vehicle into several sub-state machines, each state machine representing the high-voltage control of the high-voltage electrical load of the current path, and the state machines running in parallel; dividing the states of each sub-state machine; S3, based on the high-voltage power-on and power-off timing diagram of different scenes sorted in the first step, formulating the high-voltage power-on and power-off enable signals of each sub-state machine; S4, when any high-voltage power-on scene condition is met, first trigger the high-voltage power-on instruction to the battery management system, when the battery management system completes the high-voltage power-on, each sub-state machine jumps based on the timing diagram defined under the current scene, and finally each sub-state machine is in standby or the drive system is ready or in a fault state; complete the high-voltage power-on process; S5, when any high-voltage power-off scene condition is met, each sub-state machine jumps based on the timing diagram defined under the current scene, when all sub-state machines are in standby state, automatically trigger the high-voltage power-off instruction to the battery management system, and realize the high-voltage power-off of the whole vehicle; the fourth step and the fifth step are performed simultaneously, the priority of the high-voltage power-off is higher than that of the high-voltage power-on, and when the high-voltage power-on and the high-voltage power-off are met at the same time, the high-voltage power-off is preferentially executed.

[0005] Further, in the above technical scheme, the state of each sub-state machine in S2 is one of standby, drive system ready or fault.

[0006] Further, in the above technical scheme, S3 is to meet the scene requirements and execute the corresponding high-voltage timing.

[0007] Further, in the above technical solution, all sub-state machines in S5 are in standby state to complete the high voltage and no high voltage request.

[0008] The beneficial effects of the present application are: the control method for realizing multi-path high voltage power-on and power-off decoupling based on different scenes proposed by the present application solves the high voltage power-on and power-off problem under the above working conditions and realizes the function of multi-path high voltage power-on and power-off decoupling based on different scenes. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0010] Figure 1 is the timing diagram of high voltage power-on and high voltage power-off under each scene in the present application; Figure 2 is a schematic diagram of the state of each sub-state machine in the present application. DETAILED DESCRIPTION

[0011] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0012] See Figure 1 Different high voltage power-on and power-off scenes are sorted out, and the high voltage power-on and power-off timing diagram under each scene is formulated. The scenes are divided into five scenes: scene one: driving power-on (electronic brake release, no charging signal, no high voltage signal, gear is neutral); scene two: charging power-on, charging gun connection signal, gear is neutral, hand brake signal is valid; scene three: fault high voltage or high voltage failure; scene four: key OFF high voltage state; scene five: parking charging, vehicle has completed high voltage; charging gun connection signal is valid, gear is neutral, hand brake signal is valid; Figure 1 In the middle, After ACC indicates after ACC; After DMCU indicates after DMCU.

[0013] See Figure 2According to the high-voltage topology, the whole vehicle high-voltage electrical appliances are divided into several sub-state machines, each state machine represents the up and down high-voltage control of the high-voltage electrical load of the current line, and each state machine runs in parallel; the states of each sub-state machine are divided, including standby, pre-charging contactor closing, main positive contactor closing, main positive contactor opening, drive system ready, down high-voltage flag, pre-charging contactor opening and motor fast discharge.

[0014] See Figure 1 and 2 As shown in the control method for realizing multi-path high-voltage power-on and power-off decoupling based on different scenes, comprising the following steps: S1, sorting different up and down high-voltage scenes, and formulating the up and down high-voltage timing diagrams under each scene; S2, according to the high-voltage topology, the whole vehicle high-voltage electrical appliances are divided into several sub-state machines, each state machine represents the up and down high-voltage control of the high-voltage electrical load of the current line, and each state machine runs in parallel; the states of each sub-state machine are divided; S3, based on the up and down high-voltage timing diagrams of different scenes sorted in the first step, the up and down high-voltage enable signals of each sub-state machine are formulated; S4, when any up high-voltage scene condition is met, first trigger the up high-voltage instruction to the battery management system, when the battery management system completes the up high-voltage, each sub-state machine jumps based on the timing diagram defined under the current scene, and finally each sub-state machine is in standby or drive system ready or fault state; complete the up high-voltage process; S5, when any down high-voltage scene condition is met, each sub-state machine jumps based on the timing diagram defined under the current scene, when all sub-state machines are in standby state, automatically trigger the down high-voltage power-on instruction to the battery management system, realize the down high-voltage of the whole vehicle; the fourth step and the fifth step are carried out at the same time, the priority of the down high-voltage is higher than that of the up high-voltage, when the up high-voltage and the down high-voltage are met at the same time, the down high-voltage is executed preferentially.

[0015] Among them, the state of each sub-state machine in S2 is one of standby, drive system ready or fault. S3 is to meet the scene requirements and execute the corresponding up and down high-voltage timing. In S5, all sub-state machines are in standby state, which means that the down high-voltage is completed and there is no up high-voltage request.

[0016] The new energy trailer according to the present application has the following advantages: the up / down high-voltage demand can be sorted based on different scenes, and the high-voltage topology can be modularly managed, which can save time and improve efficiency.

[0017] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A control method for decoupling multiple high-voltage upper and lower voltage circuits based on different scenarios, characterized in that, The process includes the following steps: S1. Analyze different high-voltage and low-voltage scenarios and develop timing diagrams for each scenario; S2. Based on the high-voltage topology, divide the vehicle's high-voltage electrical components into several sub-state machines. Each state machine represents the high-voltage and low-voltage control of its respective high-voltage load, and these state machines operate in parallel; define the states of each sub-state machine; S3. Based on the timing diagrams for different scenarios analyzed in step 1, develop high-voltage and low-voltage enable signals for each sub-state machine; S4. When any high-voltage scenario condition is met, first trigger the high-voltage command to the battery management system. When the battery management system completes the high-voltage connection, each sub-state machine jumps according to the timing diagram defined in the current scenario, and finally each sub-state machine is in standby, drive system ready, or fault state; the high-voltage connection process is completed; S5, when any high-voltage disconnection scenario condition is met, each sub-state machine jumps according to the timing diagram defined in the current scenario. When all sub-state machines are in standby state, the high-voltage disconnection command is automatically triggered to the battery management system to realize the high-voltage disconnection of the whole vehicle; the fourth and fifth steps are performed simultaneously, with the high-voltage disconnection having a higher priority than the high-voltage connection. When both the high-voltage connection and the high-voltage disconnection are met, the high-voltage disconnection is executed first.

2. The control method for decoupling multiple high-voltage upper and lower voltages based on different scenarios according to claim 1, characterized in that: The state of each sub-state machine in S2 is one of standby, drive system ready, or fault.

3. The control method for decoupling multiple high-voltage upper and lower voltages based on different scenarios according to claim 1, characterized in that: S3 is executed to meet the scenario requirements, performing the corresponding upper and lower high voltage timing sequence.

4. The control method for decoupling multiple high-voltage upper and lower voltages based on different scenarios according to claim 1, characterized in that: In S5, all sub-state machines are in standby mode because they have completed the high voltage reduction and have no high voltage increase request.

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