Control method for vehicle low-temperature rapid start based on display screen and vehicle

Abstract

The embodiment of the application provides a control method for low-temperature rapid starting of a vehicle based on a display screen and the vehicle. The method comprises the following steps: when the ignition key is located in the ACC gear, the hydraulic oil temperature is obtained; when the hydraulic oil temperature is less than or equal to a preset low-temperature threshold, a low-temperature starting function activation instruction is sent to the vehicle-mounted display screen to control the vehicle-mounted display screen to pop up a prompt pop-up window containing an operation entrance; in response to a confirmation signal input by a user through the operation entrance, the vehicle is controlled to enter a low-temperature starting mode; a pre-stored electrical element priority configuration table is called, the priority configuration table stores priority levels of each electrical element, and the priority levels are determined according to the correlation between each electrical element and high-voltage power-on and engine starting; according to the priority levels, the power supply of non-essential electrical elements in the whole high-voltage power-on process is cut off, and the vehicle is controlled to perform high-voltage power-on; in the case that the vehicle enters high-voltage power-on, the power supply of the electrical elements that are cut off is restored according to the priority levels.

Description

Technical Field

[0001] This application relates to the field of tractor operation control technology, specifically to a control method and vehicle for rapid low-temperature start-up based on a display screen. Background Technology

[0002] Hybrid tractors are a new type of agricultural machinery that uses both an engine and an electric motor as dual power sources. Their electrical system contains numerous electronic control components, resulting in a significant load on the battery when powered on. Under normal operating conditions, the battery can support the normal operation of a range of electrical components.

[0003] Extremely cold environments typically refer to frigid conditions with temperatures below -25°C. In such environments, the tractor's temperature tends to match the ambient temperature after prolonged periods of inactivity. However, in extremely cold environments, hybrid tractors experience a significant drop in power supply capacity due to reduced electrolyte activity and a substantial increase in internal resistance. Meanwhile, dozens of electronic control units in the vehicle request power almost simultaneously upon ignition, creating a transient load far exceeding the battery's actual power supply capacity at low temperatures. This causes the battery voltage to drop rapidly, failing to simultaneously and quickly power on multiple electrical components and reach a high-voltage state, resulting in tractor start-up failure at low temperatures. Summary of the Invention

[0004] The purpose of this application is to provide a control method and vehicle for rapid low-temperature starting based on a display screen, in order to solve the technical defect in the prior art that the vehicle battery cannot simultaneously power all electronic control units in extremely cold environments, resulting in the failure of vehicle low-temperature starting.

[0005] To achieve the above objectives, the first aspect of this application provides a control method for rapid vehicle start-up at low temperatures based on a display screen. The control method is applied to the vehicle's overall controller and includes: When the ignition key is in the ACC position, the hydraulic oil temperature is obtained. If the hydraulic oil temperature is less than or equal to the preset low temperature threshold, a low temperature start function activation command is sent to the vehicle display screen to control the vehicle display screen to pop up a prompt window containing the operation entry. In response to the confirmation signal input by the user through the operation interface, the vehicle is controlled to enter the low-temperature start mode; In low-temperature start-up mode, a pre-stored electrical component priority configuration table is invoked. The priority configuration table stores the priority level of each electrical component, which is determined based on the correlation between each electrical component and high-voltage power-on and engine start-up. Based on priority levels, cut off the power supply to non-essential electrical components during the entire high-voltage power-on process, and control the vehicle to perform high-voltage power-on. When a vehicle is powered on at high voltage, power is restored to the de-energized electrical components in sequence according to their priority level.

[0006] In the embodiments of this application, the electrical component priority configuration table includes electrical components with a first priority, electrical components with a second priority, electrical components with a third priority, and electrical components with a fourth priority. The electrical components with the first priority are those that continuously maintain power supply in the low-temperature start-up mode. The electrical components with the second priority are those that restore power supply sequentially according to a preset time sequence before the high-voltage power-on is completed. The electrical components with the third priority are those that restore power supply immediately after the high-voltage power-on is completed. The electrical components with the fourth priority are those that restore power supply after a delay after the high-voltage power-on is completed.

[0007] In the embodiments of this application, cutting off the power supply to non-essential electrical components during the entire high-voltage power-on process according to priority levels and controlling the vehicle to perform high-voltage power-on includes: connecting the power supply to the electrical components of the first priority and cutting off the power supply to the electrical components of the second, third, and fourth priorities according to priority levels; controlling the vehicle to perform high-voltage power-on and continuously supplying power to the electrical components of the first priority through the power supply.

[0008] In an embodiment of this application, when a vehicle is powered on at high voltage, restoring the power supply to the de-energized electrical components sequentially according to priority levels includes: when the vehicle is powered on at high voltage, determining whether all electrical components of the first priority are in a powered state according to priority levels; if all electrical components of the first priority are in a powered state, before the high voltage power-on is completed, sequentially connecting the power supply to the electrical components of the second priority according to a preset timing sequence to restore the power supply to the electrical components of the second priority sequentially.

[0009] In the embodiments of this application, the second priority includes multiple sub-priorities, wherein the electrical component with the smaller rated power or power-on surge current corresponds to a higher sub-priority level, and the electrical component with a higher sub-priority level is restored to power first. Before the high voltage power-on is completed, the power supply of the electrical components of the second priority is connected sequentially according to a preset time sequence to restore the power supply of the electrical components of the second priority in sequence. This includes: before powering to the electrical component corresponding to the next sub-priority, calculating the cumulative demand current between the total current consumed by the powered electrical components and the preset power-on surge current of the electrical component to be powered; if the cumulative demand current is less than or equal to the current maximum allowable discharge current of the battery, then power is immediately supplied to the electrical component corresponding to the next sub-priority; if the cumulative demand current is greater than the current maximum allowable discharge current of the battery, then power is delayed until the cumulative demand current is less than or equal to the maximum allowable discharge current.

[0010] In the embodiments of this application, the electrical components with the second priority include at least an electronic oil pump, a main oil pump MCU power supply, a travel motor MCU power supply, an engine preheating control circuit, a TCU power supply, an HCU power supply, and an inertial navigation receiver. The engine preheating control circuit has the lowest sub-priority level and is powered on by a pulse width modulation signal with a gradually increasing duty cycle. The slope of the gradually increasing duty cycle is dynamically determined based on the current battery temperature and / or state of charge. The lower the battery temperature or the lower the state of charge, the gentler the slope.

[0011] In an embodiment of this application, when a vehicle is powered on at high voltage, restoring the power supply to the de-energized electrical components sequentially according to priority levels includes: upon detecting a high voltage power-on completion signal, immediately connecting the power supply to the third priority electrical component after the high voltage power-on is completed, in order to restore the power supply to the third priority electrical component.

[0012] In the embodiments of this application, when the vehicle is powered on at high voltage, restoring the power supply to the de-energized electrical components in sequence according to priority levels includes: after the vehicle is powered on at high voltage, determining whether all electrical components of the third priority are in a power supply state according to priority levels; if all electrical components of the third priority are in a power supply state, sequentially connecting the power supply to the electrical components of the fourth priority according to the delay time, so as to restore the power supply to the electrical components of the fourth priority in sequence.

[0013] In the embodiments of this application, the fourth priority includes multiple sub-priorities, wherein the electrical component with the smaller rated power or power-on surge current corresponds to a higher sub-priority level, and the electrical component with a higher sub-priority level restores power supply first. The delay time of delayed restoration is determined based on the state of charge of the battery or the stability of the low-voltage bus voltage after the high-voltage power-on is completed. If the battery state of charge is lower or the time required for the low-voltage bus voltage to stabilize is longer, the delay time is longer.

[0014] A second aspect of this application provides a vehicle, comprising: The vehicle controller is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the above-described display-based vehicle low-temperature rapid start control method. The vehicle display screen is used to receive the low-temperature start function activation command and pop up a prompt window containing the operation entry; it also provides an operation entry for the user to input a confirmation signal.

[0015] The above technical solution involves acquiring the hydraulic oil temperature when the ignition key is in the ACC position. If the hydraulic oil temperature is less than or equal to a preset low-temperature threshold, a low-temperature start function activation command is sent to the vehicle display screen to control the display screen to pop up a prompt window containing the operation entry. In response to the user's confirmation signal input through the operation entry, the vehicle is controlled to enter the low-temperature start mode. In the low-temperature start mode, a pre-stored electrical component priority configuration table is invoked. The priority configuration table stores the priority level of each electrical component, which is determined based on the correlation between each electrical component and high-voltage power-on and engine start. According to the priority level, the power supply to non-essential electrical components during the high-voltage power-on process is cut off, and the vehicle is controlled to perform high-voltage power-on. When the vehicle enters the high-voltage power-on state, the power supply to the de-energized electrical components is restored sequentially according to the priority level. This invention implements hierarchical power supply control for each electrical component based on a priority configuration table. In low-temperature start-up mode, the completion of high-voltage power-up is used as the dividing line. Differentiated control is applied to electrical components of different priorities, including continuous power supply, sequential power supply before high-voltage power-up is completed, and immediate or delayed power supply restoration after high-voltage power-up is completed. This reduces the instantaneous power supply load on the battery and ensures the success rate of vehicle start-up in extremely cold environments.

[0016] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1 The illustration shows a schematic flowchart of a display-based vehicle low-temperature rapid start control method according to an embodiment of this application; Figure 2 This schematic diagram illustrates a circuit diagram according to an embodiment of the present application. Figure 3 The diagram illustrates the internal structure of a computer device according to an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0020] Figure 1 The illustration schematically shows a flow diagram of a display-based vehicle low-temperature rapid start control method according to an embodiment of this application. Figure 1 As shown in the figure, this application embodiment provides a control method for rapid vehicle start-up in low temperature based on a display screen. The control method is applied to the vehicle's overall controller and may include the following steps: Step 101: When the ignition key is in the ACC position, obtain the hydraulic oil temperature. If the hydraulic oil temperature is less than or equal to the preset low temperature threshold, send a low temperature start function activation command to the vehicle display screen to control the vehicle display screen to pop up a prompt window containing the operation entry.

[0021] In this embodiment, it should be noted that the vehicle can be a hybrid tractor or other hybrid agricultural machinery with a similar electrical architecture. The ignition key being in the ACC position can be considered the accessory energizing position of the vehicle's electrical system. In this position, the vehicle's low-voltage electrical network is powered, and the vehicle controller and various sensors enter a working state. The hydraulic oil temperature can be collected by a hydraulic oil temperature sensor installed in the tractor's hydraulic system and transmitted to the vehicle controller. The preset low-temperature threshold can be a pre-calibrated temperature judgment value stored in the vehicle controller, for example, set to -25°C. When the vehicle controller determines that the hydraulic oil temperature is less than or equal to this threshold, it can be considered that the vehicle is currently in an extremely low-temperature starting condition.

[0022] The low-temperature start function activation command can be a message signal sent by the vehicle controller to the on-board display via the CAN bus to trigger a pop-up window. The on-board display can be a touchscreen screen installed in the vehicle's cab. The pop-up window can appear as a floating window on top of the current screen interface. The pop-up window content can include a numerical display of the current hydraulic oil temperature, text informing the user that the low-temperature start conditions have been met, operating instructions, and an operation entry point for the user. The operation entry point can be a touch button area on the pop-up window interface. Clicking this button generates a confirmation signal to trigger the subsequent low-temperature start mode entry process. In an exemplary working scenario, after the tractor has been left to stand overnight in a -30℃ environment, the user turns the ignition key to the ACC position. The hydraulic oil temperature sensor detects an oil temperature of -30℃, which is lower than the preset threshold of -25℃. The vehicle controller then sends a low-temperature start function activation command to the on-board display, and the display pops up a prompt window, awaiting user operation.

[0023] Step 102: In response to the confirmation signal input by the user through the operation entry, control the vehicle to enter the low temperature start mode.

[0024] In this embodiment, it should be noted that the confirmation signal can be an input signal generated by the user through touching, clicking, or pressing the operation entry on the pop-up prompt window. After receiving the confirmation signal, the vehicle controller can switch its internal status flag from the normal start mode to the low-temperature start mode. The low-temperature start mode can be a special power supply control mode preset by the vehicle controller for extremely low temperature conditions. In an exemplary working scenario, the user clicks the "Start Low-Temperature Start" button on the pop-up interface. After receiving the touch event signal corresponding to the button, the vehicle controller immediately sets the status flag to the low-temperature start mode, and the tractor then enters the low-temperature start mode.

[0025] Step 103: In low-temperature start-up mode, the pre-stored electrical component priority configuration table is invoked. The priority configuration table stores the priority level of each electrical component, which is determined based on the correlation between each electrical component and high-voltage power-on and engine start-up.

[0026] In this embodiment, it should be noted that after the vehicle controller enters the low-temperature start-up mode, a pre-stored priority configuration table can be invoked. This priority configuration table can be a pre-set data table in the vehicle controller used to define the power supply sequence and control strategy of each electrical component in the low-temperature start-up mode. This table can associate each electrical component with a corresponding priority level. The priority levels can be pre-defined based on the correlation between each electrical component and high-voltage power-on and engine start-up. Correlation refers to whether the absence or delay in power supply to a certain electrical component will prevent the high-voltage power-on process from being completed or the engine from reaching a stable operating state. Electrical components directly related to high-voltage power-on and engine start-up can have a higher priority level; electrical components unrelated to high-voltage power-on and engine start-up or only affecting comfort or auxiliary functions can have a lower priority level. The priority configuration table can include all electrical components in the vehicle involved in low-voltage power supply. By invoking this table, the vehicle controller provides a decision-making basis for subsequently implementing differentiated power supply control for each electrical component.

[0027] In this embodiment of the application, the electrical component priority configuration table includes electrical components with first priority, electrical components with second priority, electrical components with third priority, and electrical components with fourth priority. The electrical components with first priority are those that continuously maintain power supply in low-temperature start-up mode. The electrical components with second priority are those that restore power supply sequentially according to a preset time sequence before high-voltage power-on is completed. The electrical components with third priority are those that restore power supply immediately after high-voltage power-on is completed. The electrical components with fourth priority are those that restore power supply after a delay after high-voltage power-on is completed.

[0028] In this embodiment, it should be noted that the priority levels in the electrical component priority configuration table can be specifically divided into four levels. First-priority electrical components refer to those that require continuous power supply in low-temperature start-up mode. These components can be controllers or actuators directly related to the high-voltage power-up process; their absence will prevent high-voltage power-up from being completed, therefore they are not prohibited from supplying power throughout the low-temperature start-up process. Second-priority electrical components refer to those that need to be restored to power supply sequentially according to a preset time sequence before high-voltage power-up is completed. These components can be auxiliary parts related to engine starting, which are gradually activated sequentially after the first-priority power-up is completed and before high-voltage power-up is completed, to distribute the battery load during off-peak hours. Third-priority electrical components are those that are prohibited from supplying power before high-voltage power-up is completed and immediately restored to power supply after high-voltage power-up is completed. These components can be parts that do not affect high-voltage power-up and engine starting but are related to basic vehicle control or information feedback. Fourth-priority electrical components are those that are prohibited from supplying power before high-voltage power-up is completed and restored to power supply after a delay after high-voltage power-up is completed. These components can be comfort or auxiliary operation parts unrelated to the start-up process. The four priority levels are arranged from high to low according to the correlation between each electrical component and high voltage power-on and engine start-up. The lower the correlation, the later the corresponding power restoration time.

[0029] Furthermore, in this technical solution, all electrical components that the tractor may include are shown in Tables 1 and 2 below: Table 1 Electrical Components for Vehicle Controller Output Ports

[0030] Table 2 Relay Fuse Box

[0031] Specifically, the priority configuration table for electrical components can be as shown in Table 3 below, including: Table 3. Priority Configuration of Electrical Components

[0032] Step 104: Based on the priority level, cut off the power supply to non-essential electrical components during the entire high-voltage power-on process, and control the vehicle to perform high-voltage power-on.

[0033] In this embodiment, it should be noted that the vehicle controller, after calling the priority configuration table, determines the priority level of each electrical component and identifies those electrical components that are not essential during the entire high-voltage power-on process as objects requiring power supply disconnection. It then sends a disable command to these components or controls their power supply circuit to disconnect. The entire high-voltage power-on process can refer to the time period from when the vehicle controller begins executing the high-voltage power-on procedure until the high-voltage bus voltage reaches a preset stable value. During this time period, the electrical components whose power supply is disconnected do not consume battery power, thus reducing the instantaneous load on the battery. For electrical components whose power supply is not disconnected, the vehicle controller maintains its normal power supply or supplies power according to a preset sequence to ensure the normal operation of critical controllers and actuators required for the high-voltage power-on procedure. After completing the above power supply configuration, the vehicle controller executes the high-voltage power-on procedure, controlling the vehicle to complete the high-voltage power-on.

[0034] In this embodiment of the application, cutting off the power supply to non-essential electrical components during the entire high-voltage power-on process according to priority level and controlling the vehicle to perform high-voltage power-on includes: connecting the power supply to the electrical components of the first priority and cutting off the power supply to the electrical components of the second, third, and fourth priorities according to priority level; controlling the vehicle to perform high-voltage power-on and continuously supplying power to the electrical components of the first priority through the power supply.

[0035] In this embodiment, it should be noted that after the vehicle controller calls the priority configuration table, it identifies the electrical components that are not essential during the entire high-voltage power-on process as those requiring power supply disconnection, and sends them an enable / disable command or controls their power supply circuit to disconnect. Specifically, according to the priority configuration table, the electrical components essential during the entire high-voltage power-on process are the first-priority electrical components, while the electrical components that are not essential are the second-priority, third-priority, and fourth-priority electrical components. Therefore, after the vehicle enters the temperature-controlled start-up mode, the vehicle controller can connect the power supply to the first-priority electrical components and disconnect the power supply to the second-priority, third-priority, and fourth-priority electrical components, and then control the vehicle to perform high-voltage power-on, continuously supplying power to the first-priority electrical components. The entire high-voltage power-on process can refer to the period from when the vehicle controller starts executing the high-voltage power-on process until the high-voltage bus voltage reaches a preset stable value. During this period, only the first-priority electrical components are continuously powered by the battery, while the other priority electrical components are in a de-energized state to minimize the instantaneous power supply load on the battery and ensure the smooth completion of high-voltage power-on.

[0036] Step 105: When the vehicle is powered on at high voltage, restore power to the de-energized electrical components in sequence according to priority level.

[0037] In this embodiment, it should be noted that when the vehicle enters a high-voltage power-up process, the vehicle controller needs to sequentially restore the power supply to the previously disconnected electrical components. Based on priority levels, the electrical components that are not essential during the entire high-voltage power-up process are those with second, third, and fourth priorities. Therefore, the power supply to these components needs to be restored sequentially. Specifically, for second-priority electrical components, the vehicle controller restores power according to a preset timing sequence after the high-voltage power-up process begins but before it is completed. For third-priority electrical components, the vehicle controller restores power immediately after detecting the high-voltage power-up completion signal. For fourth-priority electrical components, the vehicle controller restores power after a preset delay or in batches after the high-voltage power-up is completed.

[0038] In this embodiment of the application, when the vehicle is powered on at high voltage, restoring the power supply to the de-energized electrical components in sequence according to the priority level includes: when the vehicle is powered on at high voltage, determining whether all electrical components of the first priority are in a power supply state according to the priority level; if all electrical components of the first priority are in a power supply state, before the high voltage power-on is completed, sequentially connecting the power supply to the electrical components of the second priority according to a preset timing sequence, so as to restore the power supply to the electrical components of the second priority in sequence.

[0039] In this embodiment, it should be noted that when the vehicle is powered on at high voltage, the vehicle controller needs to restore the power supply to the previously disconnected electrical components sequentially. Specifically, the power supply to the second-priority electrical components needs to be restored first. To this end, the vehicle controller can first determine whether all first-priority electrical components are powered on. If it is confirmed that all first-priority electrical components are powered on, the vehicle controller needs to connect the power supply to the second-priority electrical components sequentially according to a preset timing sequence before the high-voltage power-on is completed, so as to restore the power supply to the second-priority electrical components sequentially. The vehicle controller can make this determination by detecting the voltage feedback signal of the power supply circuit corresponding to each first-priority electrical component, or by receiving the status report message after each electrical component has been powered on. The preset timing sequence can be a pre-defined power supply order for each second-priority electrical component, for example, arranged from smallest to largest according to the rated power or power-on surge current of each electrical component, so that the electrical components with smaller power are restored first, and the electrical components with larger power are restored later. By sequentially restoring the power supply of the second priority before the first priority power supply is completed and the high-voltage power-on is completed, the stability of the low-voltage bus voltage during the high-voltage power-on period can be ensured, and the secondary impact on the battery caused by the simultaneous operation of high-power electrical components in the second priority can be avoided.

[0040] In this embodiment, the second priority includes multiple sub-priorities, wherein the electrical component with the smaller rated power or power-on surge current corresponds to a higher sub-priority level, and the electrical component with a higher sub-priority level is restored to power first. Before the high voltage power-on is completed, the power supply of the electrical components of the second priority is connected sequentially according to a preset time sequence to restore the power supply of the electrical components of the second priority in sequence. This includes: before supplying power to the electrical component corresponding to the next sub-priority, calculating the cumulative demand current between the total current consumed by the already powered electrical components and the preset power-on surge current of the electrical component to be powered; if the cumulative demand current is less than or equal to the current maximum allowable discharge current of the battery, then immediately supplying power to the electrical component corresponding to the next sub-priority; if the cumulative demand current is greater than the current maximum allowable discharge current of the battery, then delaying the power supply until the cumulative demand current is less than or equal to the maximum allowable discharge current.

[0041] In this embodiment, it should be noted that when the vehicle controller restores power to electrical components of the second priority level, the second priority level is restored sequentially according to the sub-priorities from high to low. The sub-priority level is related to the rated power or inrush current of the electrical component; the lower the rated power or inrush current of the electrical component, the higher its sub-priority level, and the earlier its power supply is restored.

[0042] Furthermore, before supplying power to the electrical components corresponding to the next sub-priority, the vehicle controller needs to calculate the cumulative demand current between the total current consumed by the already powered electrical components and the preset surge current of the electrical component to be powered. The total current consumed by the already powered electrical components can be the sum of the steady-state operating currents of each already powered electrical component, and the preset surge current can be the maximum inrush current value of the electrical component to be powered at the moment of power-on, pre-calibrated and stored. If the cumulative demand current is less than or equal to the battery's current maximum allowable discharge current, the vehicle controller can immediately supply power to the electrical components corresponding to the next sub-priority. If the cumulative demand current is greater than the battery's current maximum allowable discharge current, the vehicle controller delays power supply until the cumulative demand current is less than or equal to the maximum allowable discharge current before supplying power. The battery's current maximum allowable discharge current can be provided in real time by the battery management module or estimated by the vehicle controller based on the battery's current temperature and internal resistance. This pre-power-on current verification avoids a voltage drop on the bus due to the cumulative current exceeding the battery's power supply capacity during the restoration of power to the second-priority electrical components, ensuring the stability of the low-voltage network during high-voltage power-on.

[0043] In this embodiment, the electrical components with the second priority include at least an electronic oil pump, a main oil pump MCU power supply, a travel motor MCU power supply, an engine preheating control circuit, a TCU power supply, an HCU power supply, and an inertial navigation receiver. The engine preheating control circuit has the lowest sub-priority level and is powered on by a pulse width modulation signal with a gradually increasing duty cycle. The slope of the gradually increasing duty cycle is dynamically determined based on the current battery temperature and / or state of charge. The lower the battery temperature or the lower the state of charge, the gentler the slope.

[0044] In this embodiment, it should be noted that the electrical components of the second priority may include at least the electronic oil pump, the main oil pump MCU power supply, the travel motor MCU power supply, the engine preheating control circuit, the TCU power supply, the HCU power supply, and the inertial navigation receiver. Among the multiple sub-priorities within the second priority, the engine preheating control circuit has the lowest sub-priority level, and therefore, it is the last electrical component of the second priority to have its power restored.

[0045] Furthermore, when supplying power to the engine preheating control circuit, the vehicle controller can control its energization via a pulse width modulation (PWM) signal with an increasing duty cycle. The increasing duty cycle refers to the PWM signal's on-time percentage gradually increasing from zero or a low value to full duty cycle, resulting in a smooth rise in current through the engine preheating control circuit and suppressing surge current impacts caused by its low-resistance characteristics in a cold state. The slope of the gradually increasing duty cycle can be dynamically determined based on the battery's current temperature and / or state of charge (SBC). A lower battery temperature and a lower SBC also result in a smoother slope. The battery's current temperature and SBC can be provided by the battery management module or obtained and estimated by the vehicle controller through sensors. By dynamically adjusting the duty cycle slope, the engine preheating control circuit can be activated more gently when the battery is in poor condition, and activated more quickly when the battery is in good condition, balancing starting efficiency and power supply safety.

[0046] In this embodiment of the application, when the vehicle is powered on at high voltage, restoring the power supply to the de-energized electrical components in sequence according to priority level includes: when a high voltage power-on completion signal is detected, immediately connecting the power supply of the third priority electrical component after the high voltage power-on is completed, so as to restore the power supply of the third priority electrical component.

[0047] In this embodiment, it should be noted that when the vehicle is powered on at high voltage, the vehicle controller needs to sequentially restore the power supply to the previously disconnected electrical components. After the second-priority electrical components have all been powered on, the power supply to the third-priority electrical components needs to be restored. The third-priority electrical components are those that require immediate power restoration after the high-voltage power-on is complete. Therefore, the controller can immediately connect the power supply to the third-priority electrical components upon detecting a high-voltage power-on completion signal, thus restoring their power supply.

[0048] In this embodiment of the application, when the vehicle is powered on at high voltage, restoring the power supply to the de-energized electrical components in sequence according to the priority level includes: after the vehicle is powered on at high voltage, determining whether all electrical components of the third priority are in a power supply state according to the priority level; if all electrical components of the third priority are in a power supply state, sequentially connecting the power supply to the electrical components of the fourth priority according to the delay time, so as to restore the power supply to the electrical components of the fourth priority in sequence.

[0049] In this embodiment, it should be noted that when the vehicle is powered on at high voltage, the vehicle controller needs to sequentially restore the power supply to the previously disconnected electrical components. After all the third-priority electrical components have been restored, the power supply to the fourth-priority electrical components needs to be restored. The fourth-priority electrical components refer to those whose power supply needs to be restored after a delay following the completion of high-voltage power-on. Therefore, the vehicle controller can first determine whether all the third-priority electrical components are powered. If it is confirmed that all the third-priority electrical components are powered, the vehicle controller can sequentially connect the power supply to the fourth-priority electrical components according to the delay duration. The vehicle controller can make this determination by detecting the voltage feedback signal of the power supply circuit corresponding to each third-priority electrical component, or by receiving the status report message after each electrical component has been powered on. The delay duration can be a pre-defined fixed duration or a duration dynamically determined based on the current state of charge of the battery or the stability of the low-voltage bus voltage. Sequential connection can refer to restoring the power supply to each fourth-priority electrical component in batches or one by one according to a preset order. By first confirming that all power has been restored to the third priority level before delaying the restoration of the fourth priority level, comfort and auxiliary electrical components can be put into operation in an orderly manner, ensuring that the basic vehicle control functions have been restored to normal. This avoids secondary impacts on the low-voltage network caused by the concentrated restoration of larger power loads in the fourth priority level.

[0050] In this application embodiment, the fourth priority includes multiple sub-priorities, wherein the electrical component with the smaller rated power or power-on surge current corresponds to a higher sub-priority level, and the electrical component with a higher sub-priority level restores power supply first. The delay time of delayed restoration is determined based on the state of charge of the battery or the stability of the low-voltage bus voltage after the high-voltage power-on is completed. If the battery state of charge is lower or the time required for the low-voltage bus voltage to stabilize is longer, the delay time is longer.

[0051] In this embodiment, it should be noted that when the vehicle controller restores power to the fourth-priority electrical components, the fourth priority is restored sequentially according to the sub-priorities from high to low. The sub-priority level is related to the rated power or inrush current of the electrical component; the lower the rated power or inrush current, the higher the sub-priority level of the electrical component, and the earlier its power is restored. The delay duration for delayed restoration can be determined based on the battery's state of charge (SOC) or the stability of the low-voltage bus voltage after high-voltage power-on. The SOC can be provided by the battery management module, and the stability of the low-voltage bus voltage can be determined by the vehicle controller by detecting the bus voltage fluctuation amplitude or the time required to recover to a stable value. A lower SOC allows for a longer delay; conversely, a longer time requires for the low-voltage bus voltage to stabilize also allows for a longer delay. By dynamically determining the delay duration based on the actual state of the battery, the recovery speed of the fourth-priority electrical components can be accelerated when the battery is in good condition, and a longer buffer time can be provided when the battery is in poor condition, thus avoiding the premature activation of larger power loads in the fourth priority and causing secondary impact on the low-voltage network.

[0052] Furthermore, after the vehicle completes a cold start, the vehicle controller can respond to a user-inputted shutdown command, exiting the cold start mode and resuming normal power supply and control mode. User input can be via touch operation of the mode shutdown button on the in-vehicle display, or via physical buttons or voice commands. Upon receiving the shutdown command, the vehicle controller switches its internal status flags from cold start mode to normal mode. In normal mode, the vehicle controller no longer performs tiered power supply control based on cold start for each electrical component; each component is powered normally according to its regular power-on process, and components that were previously delayed or disabled due to the cold start mode are restored to normal power supply status. By providing a manual shutdown function, users can actively exit the cold start mode after confirming that the vehicle is running stably, improving operational flexibility and control over the vehicle.

[0053] The above technical solution involves acquiring the hydraulic oil temperature when the ignition key is in the ACC position. If the hydraulic oil temperature is less than or equal to a preset low-temperature threshold, a low-temperature start function activation command is sent to the vehicle display screen to control the display screen to pop up a prompt window containing the operation entry. In response to the user's confirmation signal input through the operation entry, the vehicle is controlled to enter the low-temperature start mode. In the low-temperature start mode, a pre-stored electrical component priority configuration table is invoked. The priority configuration table stores the priority level of each electrical component, which is determined based on the correlation between each electrical component and high-voltage power-on and engine start. According to the priority level, the power supply to non-essential electrical components during the high-voltage power-on process is cut off, and the vehicle is controlled to perform high-voltage power-on. When the vehicle enters the high-voltage power-on state, the power supply to the de-energized electrical components is restored sequentially according to the priority level. This invention implements hierarchical power supply control for each electrical component based on a priority configuration table. In low-temperature start-up mode, the completion of high-voltage power-up is used as the dividing line. Differentiated control is applied to electrical components of different priorities, including continuous power supply, sequential power supply before high-voltage power-up is completed, and immediate or delayed power supply restoration after high-voltage power-up is completed. This reduces the instantaneous power supply load on the battery and ensures the success rate of vehicle start-up in extremely cold environments.

[0054] In one embodiment, to verify the effect of this solution on improving the stability of the vehicle's low-voltage bus voltage in extremely low temperature environments, a system using this solution is compared and analyzed with a traditional system that does not employ any load management measures.

[0055] Furthermore, the power supply path at the moment of vehicle startup is abstracted into an equivalent circuit model. Assuming the battery's state of equilibrium (SOH) is 100%, its SOH and state of charge (SOC) will not change at -18℃ and -29℃. In this case, only the battery's internal resistance changes, but since the change in internal resistance is small and not linearly related to temperature, it is temporarily disregarded. Based on the above conditions, the battery terminal voltage can be considered to be 12V at this time. Wire resistance: R=ρ

[0056] Resistance of the electrical control wires in the new energy motor: R1 = 0.112Ω Resistance of the electrical control wires for the driver's cab motor: R5 = 0.078Ω Abstract this part of the control circuit into a circuit diagram as follows: Figure 2 As shown.

[0057] Wherein: power supply voltage E = 12 V, battery internal resistance r = 0.005 Ω at -29℃. R1: high-power components, total rated power P1 = 3413.14 W (operating at 12V); R2: wire resistance, R2 = 0.19 Ω; R3: motor control, rated power P3 = 3 W (operating at 12V).

[0058] Convert the power of R1 and R3 at their rated voltage of 12V to their equivalent resistance:

[0059]

[0060] Therefore, R2 + R3 = 0.19 + 48 = 48.19 Ω.

[0061] When R1 is normally connected: Parallel equivalent resistance:

[0062] Total current and bus (terminal) voltage:

[0063]

[0064] Current in branches R2 and R3, and voltage and power of R3:

[0065]

[0066]

[0067] Therefore, when R1 is turned on, due to its large operating current, a voltage drop of approximately 0.005 × 254.49 ≈ 1.27V is generated across the battery's internal resistance, pulling the bus voltage down from 12V to approximately 10.73V. As a result, R3 can only actually obtain approximately 2.38W, which is equivalent to 79.3% of the rated 3W, indicating a significant underpowering.

[0068] When the power supply to R1 is cut off: After the R1 branch is disconnected, only the R2 and R3 series branch is working in the circuit, and the battery internal resistance is directly connected in series with (R2+R3).

[0069] Current and bus voltage:

[0070]

[0071] Voltage and power of R3:

[0072]

[0073] Therefore, we can conclude that:

[0074] In a traditional system not employing this approach, the equivalent parallel resistance Rp of branch R1 and branch R2 plus R3 is approximately 0.042Ω. The total battery output current is approximately 254.49A, resulting in a voltage drop of approximately 1.27V across the battery's internal resistance, causing the low-voltage bus voltage V to drop to approximately 10.73V. At this time, the current in the branch containing the core control load R3 is approximately 0.223A, and the voltage across R3 is approximately 10.69V. The actual power received by R3 is approximately 2.38W, only 79.3% of its rated power of 3W, indicating a significant undervoltage state that could easily lead to controller undervoltage reset.

[0075] In the system employing this approach, the vehicle controller, based on the priority configuration table, assigns the electrical components corresponding to the high-power load R1 to the second priority level and disconnects their power supply circuit before the high-voltage power-on is complete. During the period when R1 is disconnected from the power supply, only the core control branch operates in the circuit. At this time, only the battery internal resistance r is connected in series with R2 and R3, with a total current of approximately 0.249A. The voltage drop across the internal resistance is negligible, and the low-voltage bus voltage remains at approximately 11.999V. The voltage across the core control load R3 is approximately 11.95V, and the actual power obtained is approximately 2.98W, reaching 99.2% of its rated power.

[0076] As can be seen from the comparison, this solution increases the actual power supply of the core control load from 79.3% to 99.2% of the rated value by prioritizing and timing the power supply of electrical components during low-temperature startup, effectively avoiding the bus voltage drop and controller undervoltage reset problems caused by the simultaneous input of high-power loads.

[0077] This application provides a vehicle, including: The vehicle controller is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the above-described display-based vehicle low-temperature rapid start control method. The vehicle display screen is used to receive the low-temperature start function activation command and pop up a prompt window containing the operation entry; it also provides an operation entry for the user to input a confirmation signal.

[0078] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 3As shown. The computer device includes a processor A01, a network interface A02, memory (not shown), and a database (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02, and a database (not shown). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A04. The database stores data related to a display-based vehicle low-temperature rapid start control method. The network interface A02 communicates with external terminals via a network connection. When the processor A01 executes the computer program B02, it implements a display-based vehicle low-temperature rapid start control method.

[0079] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0080] This application provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps: when the ignition key is in the ACC position, it acquires the hydraulic oil temperature; if the hydraulic oil temperature is less than or equal to a preset low-temperature threshold, it sends a low-temperature start function activation command to the vehicle display screen to control the display screen to pop up a prompt window containing an operation entry; in response to a confirmation signal input by the user through the operation entry, it controls the vehicle to enter the low-temperature start mode; in the low-temperature start mode, it calls a pre-stored electrical component priority configuration table, which stores the priority level of each electrical component, determined based on the correlation between each electrical component and high-voltage power-on and engine start; according to the priority level, it cuts off the power supply to non-essential electrical components during the high-voltage power-on process and controls the vehicle to perform high-voltage power-on; when the vehicle enters high-voltage power-on mode, it sequentially restores the power supply to the de-energized electrical components according to the priority level.

[0081] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program with the following steps: when the ignition key is in the ACC position, the hydraulic oil temperature is acquired; if the hydraulic oil temperature is less than or equal to a preset low temperature threshold, a low-temperature start function activation command is sent to the vehicle display screen to control the vehicle display screen to pop up a prompt window containing an operation entry; in response to a confirmation signal input by the user through the operation entry, the vehicle is controlled to enter the low-temperature start mode; in the low-temperature start mode, a pre-stored electrical component priority configuration table is invoked, the priority configuration table storing the priority level of each electrical component, the priority level being determined based on the correlation between each electrical component and high-voltage power-on and engine start; according to the priority level, the power supply to non-essential electrical components during the entire high-voltage power-on process is cut off, and the vehicle is controlled to perform high-voltage power-on; when the vehicle enters high-voltage power-on mode, the power supply to the de-energized electrical components is restored sequentially according to the priority level.

[0082] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0084] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0085] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0086] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0087] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0088] Computer-readable media include both permanent and non-permanent, removable and non-removable media that can store information by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0089] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0090] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A control method for rapid vehicle start-up at low temperatures based on a display screen, characterized in that, The control method is applied to the vehicle controller of the vehicle, and the control method includes: When the ignition key is in the ACC position, the hydraulic oil temperature is obtained. If the hydraulic oil temperature is less than or equal to a preset low temperature threshold, a low temperature start function activation command is sent to the vehicle display screen to control the vehicle display screen to pop up a prompt window containing the operation entry. In response to a confirmation signal input by the user through the operation interface, the vehicle is controlled to enter a low-temperature start mode; In the low-temperature start-up mode, a pre-stored electrical component priority configuration table is invoked. The priority configuration table stores the priority level of each electrical component, which is determined based on the correlation between each electrical component and high-voltage power-on and engine start-up. According to the priority level, the power supply to non-essential electrical components during the entire high-voltage power-on process is cut off, and the vehicle is controlled to perform high-voltage power-on. When the vehicle is powered on at high voltage, the power supply to the de-energized electrical components is restored sequentially according to the priority level.

2. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 1, characterized in that, The electrical component priority configuration table includes electrical components with a first priority, electrical components with a second priority, electrical components with a third priority, and electrical components with a fourth priority. The electrical components with the first priority are those that continuously maintain power supply in the low-temperature start-up mode. The electrical components with the second priority are those that restore power supply sequentially according to a preset time sequence before the high-voltage power-on is completed. The electrical components with the third priority are those that restore power supply immediately after the high-voltage power-on is completed. The electrical components with the fourth priority are those that restore power supply after a delay after the high-voltage power-on is completed.

3. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 1, characterized in that, The step of cutting off the power supply to non-essential electrical components during the entire high-voltage power-on process according to the priority level, and controlling the vehicle to perform high-voltage power-on, includes: According to the priority level, connect the power supply to the electrical components of the first priority and disconnect the power supply to the electrical components of the second, third and fourth priorities. The vehicle is controlled to perform high-voltage power-on and continuously supply power to the electrical components of the first priority through the power supply.

4. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 1, characterized in that, When the vehicle is powered on at high voltage, restoring power to the de-energized electrical components sequentially according to the priority level includes: When the vehicle is powered on at high voltage, it is determined whether all electrical components of the first priority are in a power supply state according to the priority level. When all electrical components of the first priority are in a powered state, the power supply of the electrical components of the second priority is connected in sequence according to a preset timing before the high voltage is powered on, so as to restore the power supply of the electrical components of the second priority in sequence.

5. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 4, characterized in that, The second priority includes multiple sub-priorities, wherein the electrical component with the smaller rated power or power-on surge current corresponds to a higher sub-priority level, and the electrical component with a higher sub-priority level is restored to power first. Before the high-voltage power-on is completed, the power supply of the electrical components of the second priority is connected sequentially according to a preset time sequence to restore the power supply of the electrical components of the second priority in sequence, including: Before supplying power to the electrical components corresponding to the next sub-priority, calculate the cumulative demand current between the total current consumed by the already powered electrical components and the preset power-on surge current of the electrical components to be powered. If the cumulative demand current is less than or equal to the current maximum allowable discharge current of the battery, then power is immediately supplied to the electrical component corresponding to the next sub-priority. If the cumulative demand current is greater than the current maximum allowable discharge current of the battery, the power supply will be delayed until the cumulative demand current is less than or equal to the maximum allowable discharge current.

6. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 4, characterized in that, The second priority electrical components include at least an electronic oil pump, a main oil pump MCU power supply, a travel motor MCU power supply, an engine preheating control circuit, a TCU power supply, an HCU power supply, and an inertial navigation receiver. The engine preheating control circuit has the lowest sub-priority and is powered on by a pulse width modulation signal with a gradually increasing duty cycle. The slope of the gradually increasing duty cycle is dynamically determined based on the current battery temperature and / or state of charge. The lower the battery temperature or the lower the state of charge, the gentler the slope.

7. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 1, characterized in that, When the vehicle is powered on at high voltage, restoring power to the de-energized electrical components sequentially according to the priority level includes: Upon detecting a high-voltage power-on completion signal, the power supply to the third-priority electrical component is immediately connected after the high-voltage power-on is completed, according to the priority level, to restore the power supply to the third-priority electrical component.

8. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 1, characterized in that, When the vehicle is powered on at high voltage, restoring power to the de-energized electrical components sequentially according to the priority level includes: After the vehicle completes high-voltage power-on, it is determined, according to the priority level, whether all electrical components of the third priority are in a power supply state; When all electrical components in the third priority are powered, the power supply to the electrical components in the fourth priority is sequentially connected according to the delay time, so as to restore the power supply to the electrical components in the fourth priority in sequence.

9. The control method for rapid vehicle start-up at low temperatures based on a display screen according to claim 8, characterized in that, The fourth priority includes multiple sub-priorities, where electrical components with smaller rated power or smaller power-on surge current have higher sub-priority levels, and electrical components with higher sub-priority levels are restored to power first. The delay time for delayed restoration is determined based on the state of charge of the battery or the stability of the low-voltage bus voltage after the high-voltage power-on is completed. If the battery state of charge is lower or the time required for the low-voltage bus voltage to stabilize is longer, the delay time will be longer.

10. A vehicle, characterized in that, include: A vehicle controller is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the display-based vehicle low-temperature rapid start control method according to any one of claims 1 to 9; The vehicle display screen is used to receive the low-temperature start function activation command and pop up a prompt window containing the operation entry; Provide an operation entry point for users to input confirmation signals.

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