Vehicle power control method, vehicle system and storage medium

Abstract

The invention relates to a vehicle power control method, a vehicle system and a storage medium, when a vehicle is in a running state, battery parameters of the vehicle are collected in real time, and the battery parameters comprise battery voltage and / or battery current; comparing the battery parameters with a preset threshold value, determining a parameter interval in which the battery parameters fall, and triggering an alarm signal of a corresponding grade according to the parameter interval in which the battery parameters fall; wherein the preset threshold value comprises a voltage threshold value and / or a current threshold value, and the parameter interval is determined based on the preset threshold value; generating a power limit instruction according to the alarm signal, and correspondingly controlling different function execution subsystems in the vehicle based on the power limit instruction; and the user experience and the driving safety are improved.

Description

Technical Field

[0001] The present application relates to the field of automobile driving, and in particular to a vehicle power control method, a vehicle system and a storage medium. Background Art

[0002] In new energy vehicles, the direct current-direct current converter (DCDC) is responsible for converting the voltage of the high-voltage battery into the voltage required by the low-voltage system, and powering low-voltage electrical equipment (such as air conditioning, infotainment system, lights, etc.). When the DCDC is overloaded or the low-voltage battery voltage is insufficient, if power limiting measures are not taken in time, it may cause battery over-discharge, system failure, and even safety hazards. At present, the solutions for DCDC overload in related technologies are mostly single power limiting strategies, such as using a fixed threshold to trigger an alarm and directly shutting down the air conditioner or infotainment system to reduce power consumption. This "all or nothing" load cutoff that is triggered by only a single threshold can quickly reduce the load, but directly cutting off the load causes the function to fail suddenly, the user experience drops sharply, and it may affect driving safety (such as turning off the lights), resulting in insufficient system safety.

[0003] Currently, there is no effective solution to the problems of low user experience and safety in vehicle power control in related technologies. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle power control method, vehicle system and storage medium that can improve user experience and driving safety in response to the above technical problems.

[0005] In a first aspect, the present application provides a vehicle power control method, comprising:

[0006] When the vehicle is in operation, real-time acquisition of battery parameters of the vehicle, the battery parameters including battery voltage and / or battery current;

[0007] Comparing the battery parameter with a preset threshold value, determining a parameter interval into which the battery parameter falls, and triggering an alarm signal of a corresponding level according to the parameter interval into which the battery parameter falls; wherein the preset threshold value includes a voltage threshold value and / or a current threshold value, and the parameter interval is determined based on the preset threshold value;

[0008] A power limit command is generated according to the warning signal, and different function execution subsystems in the vehicle are controlled accordingly based on the power limit command.

[0009] In some embodiments, the battery parameter is compared with a preset threshold value to determine the parameter interval within which the battery parameter falls, and an alarm signal of a corresponding level is triggered according to the parameter interval within which the battery parameter falls, including:

[0010] If the battery current is less than the current threshold, and the battery voltage is less than a first voltage threshold and greater than a second voltage threshold, it is determined that the battery current falls into a first current interval, the battery voltage falls into a first voltage interval, and a medium-level alarm signal is triggered according to the first current interval and the first voltage interval;

[0011] If the battery voltage is less than the second voltage threshold, it is determined that the battery voltage falls into a second voltage interval, and a high-level alarm signal is triggered according to the second voltage interval.

[0012] In some embodiments, the method further comprises:

[0013] determining whether the battery voltage is less than the first voltage threshold and greater than the second voltage threshold for a first time, and if so, determining that the battery voltage falls within the first voltage interval; or

[0014] determining whether the battery voltage is less than the second voltage threshold for a second time, and if so, determining that the battery voltage falls within the second voltage interval;

[0015] The first time is shorter than the second time.

[0016] In some embodiments, the function execution subsystem includes a power subsystem and a non-power subsystem, generates a power limit instruction according to the alarm signal, and controls different function execution subsystems in the vehicle accordingly based on the power limit instruction, including:

[0017] generating an intermediate power limit instruction according to the intermediate alarm signal, and sending the intermediate power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each non-power subsystem; or,

[0018] An advanced power limitation instruction is generated according to the advanced alarm signal, and the advanced power limitation instruction is sent to the power subsystem and the non-power subsystem, the power of the power subsystem is controlled according to the power limitation strategy corresponding to the power subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limitation strategy corresponding to each non-power subsystem.

[0019] In some embodiments, the non-power subsystem includes at least one of the following: an air conditioning control subsystem, an infotainment subsystem, a suspension subsystem, and an external lighting subsystem; sending the intermediate power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each of the non-power subsystems, including:

[0020] In the air conditioning control subsystem, the power of the front blower is limited to a first preset power range, and the rear blower and the seat ventilation and massage functions are turned off;

[0021] In the infotainment subsystem, limiting the audio current to within a preset current range, and turning off the passenger display screen, the rear seat entertainment display screen, and the wireless charging module;

[0022] In the suspension subsystem, limiting the suspension adjustment function;

[0023] In the exterior lighting subsystem, during daytime and when the combination switch is in the AUTO position, the position lights or the daytime running lights are turned off.

[0024] In some embodiments, the non-power subsystem includes at least one of the following: an air conditioning control subsystem, an infotainment subsystem, a suspension subsystem, and an external lighting subsystem; sending the advanced power limitation instruction to the power subsystem and the non-power subsystem, controlling the power of the power subsystem according to the power limitation strategy corresponding to the power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limitation strategy corresponding to each of the non-power subsystems, including:

[0025] In the power subsystem, limiting the power output to within a second preset power range;

[0026] In the air conditioning control subsystem, the wind speed of the front blower is limited to a preset gear, and the rear blower and the seat ventilation and massage functions are turned off;

[0027] In the infotainment subsystem, limiting the audio current to within a preset current range, and turning off the passenger display screen, the rear seat entertainment display screen, and the wireless charging module;

[0028] In the suspension subsystem, limiting the suspension adjustment function;

[0029] In the exterior lighting subsystem, during daytime and when the combination switch is in the AUTO position, the position lights or the daytime running lights are turned off.

[0030] In some embodiments, after triggering an alarm signal of a corresponding level according to the parameter interval into which the battery parameter falls, the method further includes:

[0031] The display subsystem is triggered to display a corresponding warning prompt according to the alarm signal.

[0032] In some embodiments, after generating a power limit instruction according to the alarm signal and controlling the power of a function execution subsystem in the vehicle based on the power limit instruction, the method further includes:

[0033] Continue to monitor the battery parameters of the vehicle to determine whether the battery parameters have returned to a preset normal range;

[0034] When it is determined that the battery parameter is restored to the normal range, a power limit release signal is triggered and sent to each of the function execution subsystems;

[0035] After the third delay time, the power restrictions on the function execution subsystems are lifted one by one in a predetermined order.

[0036] In a second aspect, the present application provides a vehicle system, including: a low-voltage power management subsystem, a vehicle mode management subsystem and a function execution subsystem; wherein:

[0037] The low-voltage power management subsystem is used to collect battery parameters of the vehicle in real time and trigger an alarm signal according to a preset threshold; wherein the preset threshold includes a voltage threshold and / or a current threshold, and the parameter interval is determined based on the preset threshold;

[0038] The vehicle mode management subsystem is used to generate a corresponding power limit instruction according to the alarm signal;

[0039] The function execution subsystem is used to execute the power limiting instruction.

[0040] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the vehicle power control method described in the first aspect are implemented.

[0041] The above-mentioned vehicle power control method, vehicle system and storage medium trigger multi-level alarm signals by real-time monitoring of battery parameters, and generate power limitation instructions of corresponding levels according to the alarm signals of corresponding levels, thereby achieving the effect of hierarchical response to optimize user experience; by sending power limitation instructions of the same level to multiple functional execution subsystems, each subsystem synchronously executes differentiated limitation strategies based on power limitation instructions of the same level, ensuring priority protection of key functions, while reducing non-essential load power, realizing coordinated control of multiple subsystems and improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a flow chart of a vehicle power control method in one embodiment;

[0043] Figure 2 is a flow chart of a vehicle power control method in another embodiment;

[0044] Figure 3 A schematic diagram of the architecture of a vehicle system in one embodiment;

[0045] Figure 4 is a schematic diagram of the architecture of a vehicle system in another embodiment;

[0046] Figure 5 for Figure 4 Schematic diagram of vehicle power control principle of vehicle system. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0049] The solution to DCDC overload in related technologies lacks hierarchical control and only triggers an "all or nothing" load cut-off through a single threshold. It cannot adapt to different fault levels and directly cuts off the load, causing sudden functional failure, poor user experience, and insufficient system security. In addition, in related technologies, each functional module responds independently and lacks unified coordination.

[0050] To solve the above problem, in one embodiment, Figure 1 A flow chart of a vehicle power control method is provided. Figure 1 As shown, the process includes the following steps:

[0051] Step S101, when the vehicle is in operation, the battery parameters of the vehicle are collected in real time, the battery parameters including the battery voltage and / or the battery current.

[0052] The vehicle is in a running state, including the vehicle is started but is relatively stationary with respect to the ground, or the vehicle is started and is in a driving state.

[0053] Step S102, compare the battery parameters with preset thresholds, determine the parameter range in which the battery parameters fall, and trigger an alarm signal of a corresponding level according to the parameter range in which the battery parameters fall; wherein the preset thresholds include voltage thresholds and / or current thresholds, and the parameter range is determined based on the preset thresholds.

[0054] For example, if the battery current (BattSftySig.SysSftyBattI) is less than the current threshold (e.g., 0A), and the battery voltage (BattSftySig.SysSftyBattU) is less than the first voltage threshold (e.g., 13.2V) and greater than the second voltage threshold (13V), it is determined that the battery current falls into the first current interval, the battery voltage falls into the first voltage interval, and a medium-level alarm signal is triggered according to the first current interval and the first voltage interval (e.g., setting ULoWarn=3). In some embodiments, it can be further determined whether the state in which the battery voltage is less than the first voltage threshold and greater than the second voltage threshold lasts for a first time (e.g., 30s). If so, it is determined that the battery voltage falls into the first voltage interval to improve the reliability of the judgment result.

[0055] If the battery voltage is less than the second voltage threshold, it is determined that the battery voltage falls into the second voltage interval, and a high-level alarm signal is triggered according to the second voltage interval (for example, LVPwrSplyErrSts is set to 2). In some embodiments, it can be further determined whether the state in which the battery voltage is less than the second voltage threshold lasts for a second time (for example, 60s). If so, it is determined that the battery voltage falls into the second voltage interval to improve the reliability of the determination result.

[0056] In some embodiments, it is also possible to determine whether the battery voltage meets the first condition: the battery voltage is less than the second voltage threshold (e.g., 13V) and lasts for 60 seconds. If the battery voltage meets the first determination condition, a high-level alarm signal is triggered. Otherwise, it is further determined whether the battery voltage meets the second condition: the battery voltage is less than the first voltage threshold (13.2V) and lasts for 30 seconds. If the battery voltage meets the second determination condition, a medium-level alarm signal is triggered.

[0057] When the intermediate alarm signal or the high alarm signal is triggered, it means that the vehicle DCDC is overloaded (or the low-voltage battery voltage is insufficient), wherein the high alarm signal indicates a more serious DCDC overload than the intermediate alarm signal.

[0058] Step S103 : generating a power limit instruction according to the alarm signal, and controlling different function execution subsystems in the vehicle accordingly based on the power limit instruction.

[0059] The functional execution subsystem includes the power subsystem and the non-power subsystem. The power subsystem involves the power generation, transmission and management of the vehicle, and is mainly used to control the speed of the vehicle. It is a relatively core subsystem. The non-power subsystem includes other systems besides power generation and transmission, which are mainly used to improve the driving experience and ensure the safety and comfort of passengers. The non-power subsystem includes at least one of the following:

[0060] Air conditioning control subsystem: responsible for adjusting the temperature, humidity and air quality in the car to ensure a comfortable riding environment.

[0061] Infotainment subsystem: includes functions such as audio playback, navigation, and phone connection, and is designed to provide information and entertainment services to drivers and passengers.

[0062] Suspension subsystem: ensures vehicle stability and ride comfort by absorbing the impact caused by uneven roads.

[0063] External lighting subsystem: includes headlights, taillights, turn signals, etc., used to improve the visibility of the vehicle under different lighting conditions and ensure driving safety.

[0064] When the car is overloaded and the power of certain subsystems needs to be limited, the power output of the power subsystem needs to be prioritized. At this time, power limitation of the non-power subsystem can be prioritized to ensure that key functions are prioritized while reducing the power of non-essential loads without affecting the safe driving of the vehicle.

[0065] The smaller the parameter interval is, the higher the level of the corresponding alarm signal is. The higher the level of the alarm signal is, the greater the restriction degree of the power limit instruction is.

[0066] When the intermediate alarm signal is triggered, an intermediate power limit instruction (e.g., setting ElPowerLevel=53) is generated according to the intermediate alarm signal, and then the intermediate power limit instruction is sent to the non-power subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limit strategy corresponding to each non-power subsystem. Wherein, ElPowerLevel represents the electrical power level.

[0067] When an advanced alarm signal is triggered, an advanced power limitation instruction (for example, setting ElPowerLevel=51) is generated according to the advanced alarm signal, and then the advanced power limitation instruction is sent to the power subsystem and the non-power subsystem, and the power of the power subsystem is controlled according to the power limitation strategy corresponding to the power subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limitation strategy corresponding to each non-power subsystem.

[0068] In some embodiments, the ULoWarn trigger threshold can be adjusted according to the vehicle model, for example, the voltage threshold for setting ULoWarn=3 is adjusted from 13.2 V to 13.5 V. ElPowerLevel can add a new level, for example, ElPowerLevel=52 for intermediate level limit.

[0069] In the above steps S101 to S103, multi-level alarm signals are triggered by real-time monitoring of battery parameters, and power limit instructions of corresponding levels are generated according to the alarm signals of corresponding levels, thereby achieving the effect of hierarchical response to optimize user experience; by sending power limit instructions of the same level to multiple functional execution subsystems, each subsystem synchronously executes differentiated limit strategies based on the power limit instructions of the same level, ensuring priority protection of key functions, while reducing non-essential load power, achieving coordinated control of multiple subsystems and improving driving safety.

[0070] In one embodiment, when the intermediate alarm signal is triggered, an intermediate power limit instruction (e.g., setting ElPowerLevel=53) is generated according to the intermediate alarm signal, and then the intermediate power limit instruction is sent to at least two non-power subsystems among the air conditioning control subsystem, the infotainment subsystem, the suspension subsystem, and the external lighting subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limit strategy corresponding to each non-power subsystem. The control methods are as follows:

[0071] In the air conditioning control subsystem, the power of the front blower is limited to a first preset power range (for example, the power is limited to 50%), and the rear blower and the seat ventilation and massage functions are turned off. In the infotainment subsystem, the audio current is limited to a preset current range (for example, the audio current is limited to less than 3.3A), and the co-pilot display, rear seat entertainment display, and wireless charging module are turned off. In the suspension subsystem, the suspension adjustment function is limited. In the exterior lighting subsystem, during the day and when the combination switch is in the AUTO position, the position lights or daytime running lights are turned off.

[0072] In one embodiment, when the advanced alarm signal is triggered, an advanced power limiting instruction (e.g., setting ElPowerLevel=51) is generated according to the advanced alarm signal, and then the advanced power limiting instruction is sent to the power subsystem, and any non-power subsystem among the air conditioning control subsystem, the infotainment subsystem, the suspension subsystem, and the external lighting subsystem, and the power of the power subsystem is controlled according to the power limiting strategy corresponding to the power subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limiting strategy corresponding to each non-power subsystem. The control methods are as follows:

[0073] In the power subsystem, limit the power output to within the second preset power range (for example, limit the power output to 70% of the maximum power). In the air conditioning control subsystem, limit the wind speed of the front blower to a preset gear (for example, limit the front blower to 1st gear), and turn off the rear blower as well as the seat ventilation and massage functions. In the infotainment subsystem, limit the audio current to within the preset current range (for example, limit the audio current to below 3.3A), and turn off the co-pilot display, rear seat entertainment display, and wireless charging module. In the suspension subsystem, limit the suspension adjustment function. In the external lighting subsystem, turn off the position lights or daytime running lights during the day when the combination switch is in AUTO gear.

[0074] In some embodiments, after triggering an alarm signal of a corresponding level according to the parameter interval that the battery parameter falls into, the display subsystem may also be triggered to display a corresponding warning prompt according to the alarm signal.

[0075] The display subsystem displays corresponding warnings according to the ULoWarn signal level, as follows:

[0076] ULoWarn=0:Do not display low voltage power system warning prompt;

[0077] ULoWarn=1:display “Battery voltage is too low”;

[0078] ULoWarn=3: Displays "System load is high, functions are limited";

[0079] LVPwrSplyErrSts=2: Displays “12V charging failure, please stop immediately”.

[0080] In some embodiments, after generating a power limit instruction according to an alarm signal and controlling the power of the function execution subsystem in the vehicle based on the power limit instruction, the battery parameters of the vehicle can continue to be monitored to determine whether the battery parameters have returned to a preset normal range; when it is determined that the battery parameters have returned to a normal range, the power limit on the function execution subsystem is released. Specifically, a power limit release signal is triggered, sent to each function execution subsystem, and after a delay of a third time (for example, a delay of 10s), the power limit is released one by one for each function execution subsystem in a predetermined order. In this way, a delay mechanism is introduced when the load is restored to reduce the risk of instantaneous current shocks, improve system reliability, and prevent secondary failures. In some embodiments, the third time can be adjusted dynamically, for example, the third time can be shortened or extended according to the ambient temperature.

[0081] For example, when it is detected that the battery voltage has returned to the normal range (such as ≥13.5V), a power limit release signal is generated. When each restricted subsystem receives the power limit release signal, the delayed recovery process (default 10 seconds) will be started. Among them, the power subsystem is restored first, the power limit is released, and it is restored to the normal output mode, and then other subsystems are gradually restored. For example, in the air conditioning control subsystem, the front blower is restored to 50%, the seat ventilation and massage are restored, and the rear blower is restored. After a delay of 10s, the front blower power is restored to 100%. In the infotainment subsystem, the co-pilot screen is turned on first, and then the entertainment screen is turned on. After a delay of 10s, the audio and wireless charging modules are turned on. In the suspension system, the suspension adjustment function is delayed for 10s to recover. In the external lighting subsystem, the daytime running lights and position lights are gradually started according to the current environment. Finally, the HMI synchronously updates the warning status to "low voltage power system is normal".

[0082] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0083] Figure 2 A flow chart of another vehicle power control method is provided, such as Figure 2 As shown, the process includes the following steps:

[0084] Step S201, when the vehicle is in operation, the battery parameters of the vehicle are collected in real time, the battery parameters including the battery voltage and / or the battery current.

[0085] Step S202, compare the battery parameters with the preset threshold. There are the following situations:

[0086] If the battery current is less than the current threshold, and the battery voltage is less than the first voltage threshold and greater than the second voltage threshold and continues in this state for a first time, it is determined that the battery current falls into the first current interval and the battery voltage falls into the first voltage interval, and step S203 is executed; if the battery voltage is less than the second voltage threshold and continues in this state for a second time, it is determined that the battery voltage falls into the second voltage interval, and step S206 is executed.

[0087] Step S203: triggering an intermediate alarm signal according to the first current interval and the first voltage interval, and displaying it on the HMI display subsystem.

[0088] Step S204: generating a medium power limit instruction according to the medium alarm signal.

[0089] Step S205, sending the intermediate power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each non-power subsystem. The steps include:

[0090] In the air conditioning control subsystem, the power of the front blower is limited to a first preset power range, and the rear blower and the seat ventilation and massage functions are turned off;

[0091] In the infotainment subsystem, the audio current is limited to a preset current range, and the passenger display, rear seat entertainment display, and wireless charging module are turned off;

[0092] In the suspension subsystem, limiting the suspension adjustment function;

[0093] In the exterior lighting subsystem, turn off the position lights or daytime running lights during daytime and when the combination switch is in the AUTO position.

[0094] After completing the above power synchronization control, go to step S209.

[0095] Step S206 , triggering a high-level alarm signal according to the second voltage interval, and displaying it on the HMI display subsystem.

[0096] Step S207: generating a high-level power limit instruction according to the high-level alarm signal.

[0097] Step S208, sending the high-level power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each non-power subsystem. The steps include:

[0098] In the power subsystem, limiting the power output to within a second preset power range;

[0099] In the climate control subsystem, the wind speed of the front blower is limited to a preset gear, and the rear blower and seat ventilation and massage functions are turned off;

[0100] In the infotainment subsystem, the audio current is limited to a preset current range, and the passenger display, rear seat entertainment display, and wireless charging module are turned off;

[0101] In the suspension subsystem, limit the suspension adjustment function;

[0102] In the exterior lighting subsystem, during daytime, when the combination switch is in the AUTO position, turn off the position lights or daytime running lights;

[0103] After completing the above power synchronization control, go to step S209.

[0104] Step S209, continue monitoring the battery parameters of the vehicle.

[0105] Step S210 determines whether the battery parameters are restored to a preset normal range; if so, executing step S211.

[0106] Step S211: trigger a power limit release signal and send it to each function execution subsystem.

[0107] Step S212: after a delay of a third time, the power restrictions on each function execution subsystem are lifted one by one in a predetermined order.

[0108] In this embodiment, the load is gradually limited through graded alarms from ULoWarn=1 (warning) to ULoWarn=3 (emergency limit), avoiding sudden failure of functions, and optimizing the user experience through graded response. Each subsystem is adjusted synchronously based on a unified command to prevent functional conflicts (such as coordinated load reduction of the power system and air conditioning), and collaborative control improves safety. The gradual recovery function avoids instantaneous current peaks, prolongs equipment life, and delayed recovery enhances reliability.

[0109] In one embodiment, Figure 3 A schematic diagram of the architecture of a vehicle system is provided, such as Figure 3As shown, the vehicle system includes: a low voltage electrical energy management subsystem (Low Voltage Electrical Energy Management, referred to as LVEEM), a vehicle mode management subsystem (Vehicle Mode Management, referred to as VMM), and a function execution subsystem.

[0110] The low-voltage power management subsystem is used to collect the battery parameters of the vehicle in real time and trigger an alarm signal based on a preset threshold; wherein the preset threshold includes a voltage threshold and / or a current threshold, and the parameter interval is determined based on the preset threshold. The smaller the parameter interval, the higher the level of the corresponding alarm signal.

[0111] The vehicle mode management subsystem is used to generate a corresponding power limit instruction according to the alarm signal; wherein, the higher the level of the alarm signal, the greater the restriction degree of the power limit instruction.

[0112] The function execution subsystem is used to execute power limiting instructions.

[0113] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0114] In one embodiment, Figure 4 Another schematic diagram of the vehicle system architecture is provided, such as Figure 4 As shown, the low voltage power management subsystem includes a voltage sensor, a current sensor and a first logic control unit. The voltage sensor is used to monitor the battery voltage in real time (BattSftySig.SysSftyBattU), the current sensor is used to monitor the battery current in real time (BattSftySig.SysSftyBattI), and the first logic control unit is used to trigger a graded alarm signal (ULoWarn=0 / 1 / 2 / 3, LVPwrSplyErrSts) according to a preset threshold.

[0115] The vehicle mode management subsystem includes a CAN communication unit and a second logic control unit, wherein the CAN communication unit is used to receive an alarm signal based on a CAN message protocol, and the second logic control unit is used to generate a power limit instruction of a corresponding level (ElPowerLevel=51 / 53) based on the alarm signal.

[0116] The function execution subsystem includes an air-conditioning control subsystem, an infotainment subsystem, a suspension subsystem, an external lighting subsystem, and a power subsystem. The second logic control unit sends power limit instructions to each function execution subsystem through the CAN communication unit to achieve synchronous control of air-conditioning control, infotainment, human-machine interaction display, suspension system, external lighting system, and power system, and execute differential restriction strategies (such as reducing the power of the air conditioner and turning off non-core devices of the infotainment).

[0117] The vehicle system also includes a display subsystem (Human Machine Interface, abbreviated as HMI), and the display subsystem includes a display unit and a communication interface. Among them, the communication interface is used to receive alarm signals based on the CAN message protocol, and the display unit is used to display corresponding warning information according to the ULoWarn signal level (such as "ULoWarn = 1 reports that the battery voltage is too low" or "ULoWarn = 3 reports that the system load is high, and power-consuming devices such as the air conditioner are restricted, and normal driving is possible").

[0118] In this embodiment, Figure 5 For Figure 4 the schematic diagram of the vehicle power control principle of the vehicle system, and its operation principle is as follows:

[0119] 1. Implement battery parameter monitoring

[0120] The low-voltage electrical energy management subsystem (LVEEM) collects the battery voltage (BattSftySig.SysSftyBattU) and current (BattSftySig.SysSftyBattI) in real time. When the vehicle is in the Driving mode, the first logic control unit makes a threshold judgment (the requested DCDC output voltage of the system is 13.6V):

[0121] (1) When it is monitored that BattSftySig.SysSftyBattI < 0A AND BattSftySig.SysSftyBattU < 13.2V for 30s, set ULoWarn = 3 for 6min;

[0122] (2) When it is monitored that BattSftySig.SysSftyBattU < 13V continuously for 60s, set LVPwrSplyErrSts = 2;

[0123] (3) When it is monitored that BattSftySig.SysSftyBattU > 13.5V, set ULoWarn = 0 and LVPwrSplyErrSts ≠ 2

[0124] 3. Generate and propagate instructions

[0125] The vehicle mode management subsystem (VMM) receives the warning signal (ULoWarn or LVPwrSplyErrSts) from LVEEM, and generates corresponding instructions according to the signal: ULoWarn=3→ElPowerLevel=53 (intermediate limit), LVPwrSplyErrSts=2→ElPowerLevel=51 (high limit), and transmits the instructions to each function execution subsystem through the CAN bus.

[0126] 4. Subsystem response

[0127] Each functional execution subsystem limits some comfort loads without affecting the safe driving of the vehicle. The details are as follows:

[0128] Air conditioning control subsystem:

[0129] ElPowerLevel=53: The front blower power is limited to 50%, and the rear blower and seat ventilation and massage functions are turned off.

[0130] ElPowerLevel=51: The front blower is limited to 1st gear, and the rear blower, seat ventilation and massage are turned off.

[0131] Infotainment Subsystem:

[0132] When ElPowerLevel=53or51: limit the audio current to below 3.3A, turn off the co-pilot screen, rear entertainment screen and wireless charging module (WPC).

[0133] Suspension subsystem:

[0134] When ElPowerLevel=53or 51: limit the suspension adjustment function;

[0135] External lighting subsystem:

[0136] When ElPowerLevel=53or51: During the day and when the combination switch is in AUTO position, turn off the position lights or daytime running lights.

[0137] Power subsystem:

[0138] When ElPowerLevel=51, the power output is limited to 70% of the maximum power.

[0139] 5.HMI warning display

[0140] The display subsystem displays corresponding warnings according to the ULoWarn signal level, as follows:

[0141] ULoWarn=0:Do not generate low voltage power system warning display;

[0142] ULoWarn=1; Display "Battery voltage is too low";

[0143] ULoWarn=3: Displays "System load is high, functions are limited".

[0144] LVPwrSplyErrSts=2: Displays “12V charging failure, please stop immediately”.

[0145] 6. Recovery Phase

[0146] When the battery voltage is detected to be restored to the normal range (such as ≥13.5V), the VMM sends a recovery signal to each restricted subsystem and starts the delayed recovery logic (default 10 seconds). The power subsystem is restored first, the power restriction is lifted, and the normal output mode is restored. Then other subsystems are gradually restored, as follows:

[0147] Air conditioning control subsystem: front blower restored to 50%, seat ventilation and massage restored, rear blower restored, and after a delay of 10s, the front blower power reached 100%.

[0148] Infotainment subsystem: turn on the co-pilot screen first, then the entertainment screen, and after a delay of 10 seconds, turn on the audio and wireless charging modules.

[0149] Suspension system: The suspension adjustment function is restored after a delay of 10 seconds;

[0150] Exterior lighting system: gradually start turning on daytime running lights and position lights according to the current environment;

[0151] The HMI synchronously updates the warning status to "low voltage power system normal".

[0152] In this embodiment, the voltage sensor monitors the battery voltage in real time (BattSftySig.SysSftyBattU), and the current sensor monitors the battery current in real time (BattSftySig.SysSftyBattI). Both input the battery voltage and battery current into the first logic control unit, and the first logic control unit triggers the graded alarm signal (ULoWarn=0 / 1 / 2 / 3, LVPwrSplyErrSts) according to the preset threshold. On the one hand, the communication interface of the display subsystem receives the alarm signal based on the CAN message protocol, and the display unit displays the corresponding warning information according to the ULoWarn signal level (such as "ULoWarn=1 reports that the battery voltage is too low" or "ULoWarn=3 reports that the system load is high, the air conditioner and other electrical equipment are restricted, and the vehicle can be driven normally"). On the other hand, the CAN communication unit of the vehicle mode management subsystem receives the alarm signal to the second logic control unit, and the second logic control unit generates the corresponding level of power limitation instructions (ElPowerLevel=51 / 53) based on the alarm signal. This setting makes it possible to dynamically adjust the limitation strategy according to the severity of the fault to avoid excessive limitation or insufficient response. The second logic control unit sends the power limit instruction to each functional execution subsystem through the CAN communication unit to achieve synchronous control of air conditioning control, infotainment, human-computer interaction display, suspension system, exterior lighting system, and power system, and implements differentiated restriction strategies (such as reducing air conditioning power and shutting down non-core equipment for infotainment). This setting ensures that key functions (such as power systems) are prioritized while reducing the power of non-essential loads. In addition, after the power limit is lifted, each subsystem gradually restores its function through delayed processing (for example, the power system is restored first, and the air conditioning power is restored after a delay of 10 seconds) to avoid instantaneous current shocks. This setting improves system reliability and prevents secondary failures.

[0153] In addition, in combination with the vehicle power control method provided in the above embodiments, a storage medium may be provided in this embodiment to implement the vehicle power control method. The storage medium stores a computer program, and when the computer program is executed by a processor, any vehicle power control method in the above embodiments is implemented.

[0154] In one embodiment, the computer program implements the following steps when executed by a processor:

[0155] When the vehicle is in operation, the battery parameters of the vehicle are collected in real time, the battery parameters including battery voltage and / or battery current;

[0156] Compare the battery parameter with a preset threshold value, determine the parameter interval within which the battery parameter falls, and trigger an alarm signal of a corresponding level according to the parameter interval within which the battery parameter falls; wherein the preset threshold value includes a voltage threshold value and / or a current threshold value, and the parameter interval is determined based on the preset threshold value, and the smaller the parameter interval is, the higher the level of the corresponding alarm signal is;

[0157] A power limit instruction is generated according to the alarm signal, and different function execution subsystems in the vehicle are controlled accordingly based on the power limit instruction; wherein, the higher the level of the alarm signal, the greater the restriction degree of the power limit instruction.

[0158] In one embodiment, the computer program implements the following steps when executed by a processor:

[0159] If the battery current is less than the current threshold, and the battery voltage is less than the first voltage threshold and greater than the second voltage threshold, it is determined that the battery current falls into the first current interval and the battery voltage falls into the first voltage interval, and a medium-level alarm signal is triggered according to the first current interval and the first voltage interval;

[0160] If the battery voltage is less than the second voltage threshold, it is determined that the battery voltage falls into a second voltage interval, and a high-level alarm signal is triggered according to the second voltage interval.

[0161] In one embodiment, the computer program implements the following steps when executed by a processor:

[0162] Determine whether the battery voltage is less than the first voltage threshold and greater than the second voltage threshold for a first time, and if so, determine that the battery voltage falls into the first voltage interval; or,

[0163] Determine whether the battery voltage is less than a second voltage threshold for a second time, and if so, determine that the battery voltage falls into a second voltage interval;

[0164] Among them, the first time is less than the second time.

[0165] In one embodiment, the computer program implements the following steps when executed by a processor:

[0166] generating an intermediate power limit instruction according to the intermediate alarm signal, and sending the intermediate power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each non-power subsystem; or,

[0167] An advanced power limitation instruction is generated according to the advanced alarm signal, and the advanced power limitation instruction is sent to the power subsystem and the non-power subsystem, the power of the power subsystem is controlled according to the power limitation strategy corresponding to the power subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limitation strategy corresponding to each non-power subsystem.

[0168] In one embodiment, the computer program implements the following steps when executed by a processor:

[0169] In the air conditioning control subsystem, the power of the front blower is limited to a first preset power range, and the rear blower and the seat ventilation and massage functions are turned off;

[0170] In the infotainment subsystem, the audio current is limited to a preset current range, and the passenger display, rear seat entertainment display, and wireless charging module are turned off;

[0171] In the suspension subsystem, limit the suspension adjustment function;

[0172] In the exterior lighting subsystem, turn off the position lights or daytime running lights during daytime when the combination switch is in the AUTO position.

[0173] In one embodiment, the computer program implements the following steps when executed by a processor:

[0174] In the power subsystem, limiting the power output to within a second preset power range;

[0175] In the climate control subsystem, the wind speed of the front blower is limited to a preset gear, and the rear blower and seat ventilation and massage functions are turned off;

[0176] In the infotainment subsystem, the audio current is limited to a preset current range, and the passenger display, rear seat entertainment display, and wireless charging module are turned off;

[0177] In the suspension subsystem, limit the suspension adjustment function;

[0178] In the exterior lighting subsystem, turn off the position lights or daytime running lights during daytime when the combination switch is in the AUTO position.

[0179] In one embodiment, the computer program implements the following steps when executed by a processor:

[0180] The display subsystem is triggered to display corresponding warning prompts according to the alarm signal.

[0181] In one embodiment, the computer program implements the following steps when executed by a processor:

[0182] Continue to monitor the vehicle's battery parameters to determine whether the battery parameters have returned to the preset normal range;

[0183] When it is determined that the battery parameters have returned to the normal range, a power limit release signal is triggered and sent to each function execution subsystem;

[0184] After the third delay time, the power restrictions on the function execution subsystems are lifted one by one in a predetermined order.

[0185] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0186] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0187] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0188] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A vehicle power control method, characterized in that: include: When the vehicle is in operation, real-time acquisition of battery parameters of the vehicle, the battery parameters including battery voltage and / or battery current; Comparing the battery parameter with a preset threshold value, determining a parameter interval into which the battery parameter falls, and triggering an alarm signal of a corresponding level according to the parameter interval into which the battery parameter falls; wherein the preset threshold value includes a voltage threshold value and / or a current threshold value, and the parameter interval is determined based on the preset threshold value; A power limit command is generated according to the warning signal, and different function execution subsystems in the vehicle are controlled accordingly based on the power limit command.

2. The vehicle power control method according to claim 1, characterized in that: Comparing the battery parameter with a preset threshold value, determining the parameter interval within which the battery parameter falls, and triggering an alarm signal of a corresponding level according to the parameter interval within which the battery parameter falls, including: If the battery current is less than the current threshold, and the battery voltage is less than a first voltage threshold and greater than a second voltage threshold, it is determined that the battery current falls into a first current interval, the battery voltage falls into a first voltage interval, and a medium-level alarm signal is triggered according to the first current interval and the first voltage interval; If the battery voltage is less than the second voltage threshold, it is determined that the battery voltage falls into a second voltage interval, and a high-level alarm signal is triggered according to the second voltage interval.

3. The vehicle power control method according to claim 2, characterized in that: The method further comprises: determining whether the battery voltage is less than the first voltage threshold and greater than the second voltage threshold for a first time, and if so, determining that the battery voltage falls within the first voltage interval; or determining whether the battery voltage is less than the second voltage threshold for a second time, and if so, determining that the battery voltage falls within the second voltage interval; The first time is shorter than the second time.

4. The vehicle power control method according to claim 2, characterized in that: The function execution subsystem includes a power subsystem and a non-power subsystem, generates a power limit instruction according to the alarm signal, and controls different function execution subsystems in the vehicle accordingly based on the power limit instruction, including: generating an intermediate power limit instruction according to the intermediate alarm signal, and sending the intermediate power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each non-power subsystem; or, An advanced power limitation instruction is generated according to the advanced alarm signal, and the advanced power limitation instruction is sent to the power subsystem and the non-power subsystem, the power of the power subsystem is controlled according to the power limitation strategy corresponding to the power subsystem, and the power of the corresponding non-power subsystem is controlled according to the power limitation strategy corresponding to each non-power subsystem.

5. The vehicle power control method according to claim 4, characterized in that: The non-power subsystem includes at least one of the following: an air conditioning control subsystem, an infotainment subsystem, a suspension subsystem, and an external lighting subsystem; sending the intermediate power limit instruction to the non-power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limit strategy corresponding to each of the non-power subsystems, including: In the air conditioning control subsystem, the power of the front blower is limited to a first preset power range, and the rear blower and the seat ventilation and massage functions are turned off; In the infotainment subsystem, limiting the audio current to within a preset current range, and turning off the passenger display screen, the rear seat entertainment display screen, and the wireless charging module; In the suspension subsystem, limiting the suspension adjustment function; In the exterior lighting subsystem, during daytime and when the combination switch is in the AUTO position, the position lights or the daytime running lights are turned off.

6. The vehicle power control method according to claim 4, characterized in that: The non-power subsystem includes at least one of the following: an air conditioning control subsystem, an infotainment subsystem, a suspension subsystem, and an external lighting subsystem; sending the advanced power limitation instruction to the power subsystem and the non-power subsystem, controlling the power of the power subsystem according to the power limitation strategy corresponding to the power subsystem, and controlling the power of the corresponding non-power subsystem according to the power limitation strategy corresponding to each of the non-power subsystems, including: In the power subsystem, limiting the power output to within a second preset power range; In the air conditioning control subsystem, the wind speed of the front blower is limited to a preset gear, and the rear blower and the seat ventilation and massage functions are turned off; In the infotainment subsystem, limiting the audio current to within a preset current range, and turning off the passenger display screen, the rear seat entertainment display screen, and the wireless charging module; In the suspension subsystem, limiting the suspension adjustment function; In the exterior lighting subsystem, during daytime and when the combination switch is in the AUTO position, the position lights or the daytime running lights are turned off.

7. The vehicle power control method according to claim 2, characterized in that: After triggering an alarm signal of a corresponding level according to the parameter interval into which the battery parameter falls, the method further includes: The display subsystem is triggered to display a corresponding warning prompt according to the alarm signal.

8. The vehicle power control method according to claim 1, characterized in that: After generating a power limit instruction according to the alarm signal and controlling the power of a function execution subsystem in the vehicle based on the power limit instruction, the method further includes: Continue to monitor the battery parameters of the vehicle to determine whether the battery parameters have returned to a preset normal range; When it is determined that the battery parameter is restored to the normal range, a power limit release signal is triggered and sent to each of the function execution subsystems; After the third delay time, the power restrictions on the function execution subsystems are lifted one by one in a predetermined order.

9. A vehicle system, characterized in that: include: Low-voltage power management subsystem, vehicle mode management subsystem and function execution subsystem; among them, The low-voltage power management subsystem is used to collect battery parameters of the vehicle in real time and trigger an alarm signal according to a preset threshold; wherein the preset threshold includes a voltage threshold and / or a current threshold, and the parameter interval is determined based on the preset threshold; The vehicle mode management subsystem is used to generate a corresponding power limit instruction according to the alarm signal; The function execution subsystem is used to execute the power limiting instruction.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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