Vehicle control method and device, vehicle and medium

Abstract

The invention relates to a vehicle control method and device, a vehicle and a medium. The method comprises the steps that the output current of a direct-current converter in a power supply system of the vehicle is obtained; under the condition that the output current is abnormal, the vehicle state and the abnormity type of the vehicle are determined; the vehicle is controlled based at least on the vehicle state and the anomaly type. According to the scheme, under the condition that the output current of the direct-current converter is abnormal, the vehicle control requirements of various scenes can be met based on different vehicle states and abnormal types, and the user experience is high.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a vehicle control method, device, vehicle and medium. Background Art

[0002] With the development of automobile intelligence, hybrid vehicles and pure electric vehicles need to use a direct current converter (Direct Current-Direct Current, DCDC) to supply power to the low-voltage load and battery of the vehicle after the high voltage is applied to the vehicle.

[0003] With the development of vehicle intelligence, low-voltage loads are increasing, and the demand for DCDC conversion power is increasing. In practice, abnormal DCDC output current in the power supply system is prone to occur.

[0004] How to achieve vehicle control when the output current is abnormal has become a problem that needs to be solved urgently. Summary of the invention

[0005] One of the purposes of the present application is to provide a vehicle control method, device, vehicle and medium. The solution can meet the vehicle control requirements for various scenarios based on different vehicle states and abnormality types when the output current of the DC converter in the power supply system is abnormal, and the user experience is high.

[0006] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] In a first aspect, the present application provides a vehicle control method, the method comprising: obtaining the output current of a DC converter in a power supply system of the vehicle; in the event of an abnormal output current, determining a vehicle state and an abnormality type of the vehicle; and controlling the vehicle at least based on the vehicle state and the abnormality type.

[0008] Based on the above technical means, the output current of the DC converter in the power supply system can be continuously obtained. When the output current is abnormal, the current vehicle state and abnormality type are determined, and then the vehicle is controlled in a manner corresponding to the current vehicle state and abnormality type. In this way, the control method may be the same or different for different vehicle states, and the control method may be the same or different for different abnormality types. This solution can meet the vehicle control requirements under various vehicle states and abnormal scenarios, reduce the impact of current abnormalities on user experience, and improve user experience.

[0009] In one possible implementation, when the abnormality type includes a first type, the vehicle is controlled at least based on the vehicle state and the abnormality type, including: if the vehicle state is a parking state, power is supplied to the vehicle's low-voltage load through the vehicle's battery, a first prompt message is output, and the vehicle is controlled to enter a sleep state after a first period of time; the first prompt message is used to indicate that the vehicle's power system is abnormal; if the vehicle state is a driving state, the output voltage of the battery is obtained, and the vehicle is controlled based on the output voltage of the battery; wherein, under the first type, the output current of the DC converter is zero.

[0010] Based on the above technical means, for the first type of abnormality, since the output current of the DC converter is zero under the first type, the battery is used for low-voltage power supply to ensure the basic power supply demand of the vehicle, and then for the parking state, the vehicle is directly controlled to enter the dormant state after the first time length of the first prompt information is output, thereby reducing the power demand; for the driving state, the specific control method needs to be determined according to the output voltage value of the battery. It can be seen that this embodiment can meet the control requirements of various vehicle states under the first type of abnormality.

[0011] In one possible implementation, controlling a vehicle based on the output voltage of a battery includes: if the output voltage of the battery falls within a first voltage range, supplying power to a low-voltage load of the vehicle through the battery to control normal driving and operation of the vehicle; if the output voltage of the battery falls within a second voltage range, supplying power to a low-voltage load of the vehicle through the battery to control normal driving and operation of the vehicle; and outputting a second prompt message; the second prompt message is used to characterize that the battery voltage is low; if the output voltage of the battery falls within a third voltage range, supplying power to a low-voltage load of the vehicle through the battery, limiting the vehicle's driving speed, and outputting a third prompt message; the third prompt message is used to characterize that the vehicle's power system is abnormal, and the driver please stop the vehicle safely; wherein, the voltage value of the first voltage range is greater than the voltage value of the second voltage range, and the voltage value of the second voltage range is greater than the voltage value of the third voltage range.

[0012] Based on the above technical means, for the first type of abnormal and driving state of the vehicle, this embodiment classifies the output voltage of the battery, and adopts different control methods for different voltage ranges, which can meet the vehicle control requirements while not affecting the performance of the battery. When the battery voltage is in the first voltage range, the battery power is sufficient, so there is no function restriction. When the battery voltage is in the second voltage range, the battery power is not sufficient, so it is necessary to remind that the battery power is low. When the battery voltage is in the third voltage range, the battery power is low, so the speed is limited and the power system is abnormal. Please stop safely. In this way, the battery will not be fed, and the vehicle control requirements will be met as much as possible according to the power, and the user experience is high.

[0013] In one possible implementation, when the abnormality type includes the second type, the vehicle is controlled at least based on the vehicle state and the abnormality type, including: monitoring the output voltage of the vehicle's battery; if the output voltage falls within a fourth voltage range, limiting a first target function of the vehicle based on the vehicle state; supplying power to the vehicle via a DC converter and a battery to control the vehicle; wherein, under the second type, the output current of the DC converter is greater than an upper limit of the output current.

[0014] Based on the above technical means, for the second type of abnormality, since the output current of the DC converter under the second type is greater than the output current upper limit, that is, the demand is large, it is necessary to supply power through the DC converter and the battery together, so as to meet the power supply demand as much as possible, and detect the output voltage of the battery in real time. If the output voltage of the battery belongs to the fourth voltage range, it is necessary to limit some vehicle functions to meet the power supply demand. This avoids the situation where the vehicle control abnormality caused by the large demand cannot be met, and improves the user experience.

[0015] In one possible implementation, if the output voltage falls within the fourth voltage range, the first target function of the vehicle is limited based on the vehicle state, including: if the time for which the output voltage falls within the fourth voltage range is less than or equal to a second duration, the first function of the vehicle is limited based on the vehicle state; if the time for which the output voltage falls within the fourth voltage range is greater than the second duration and less than a third duration, the second function of the vehicle is limited based on the vehicle state; the first function is different from the second function, and the third duration is greater than the second duration.

[0016] Based on the above technical means, the duration of the output voltage in the fourth voltage range is monitored in real time, and the duration is divided into two duration ranges. If the duration is less than or equal to the first duration, the first function is restricted, and if it is greater than the first duration and less than the second duration, the second function is restricted. In this way, the first function and the second function can be restricted in stages for different durations, thereby ensuring the functions of the vehicle as much as possible to improve the user experience.

[0017] In a possible implementation, if the vehicle is in a driving state, the first function includes an AC discharge function; the second function includes: a non-power-controlled low-voltage load control function; if the vehicle is in a parking state, the first function includes a non-power-controlled low-voltage load control function; the second function includes: an AC discharge function.

[0018] Based on the above technical means, for the AC discharge function and the non-power-controlled low-voltage load control function, since the driving state may have a stronger demand for the non-power-controlled low-voltage load control function, the AC discharge function is limited first, and then the non-power-controlled low-voltage load control function is further limited; since the parking state may have a weaker demand for the non-power-controlled low-voltage load control function, the non-power-controlled low-voltage load control function is limited first, and then the AC discharge function is further limited. This restriction method is more in line with actual needs, so the user experience is higher.

[0019] In one possible implementation, if the output voltage falls within the second voltage range, the second target function of the vehicle is limited; the vehicle is powered by a DC converter and a battery, and a second prompt message is output; the second prompt message is used to indicate that the battery voltage is low; if the output voltage falls within the third voltage range, the second target function of the vehicle is limited; the vehicle is powered by a DC converter and a battery, the vehicle's driving speed is limited, and a third prompt message is output; the third prompt message is used to indicate that the vehicle's power system is abnormal and please stop safely; wherein, the voltage value of the third voltage range is less than the voltage value of the second voltage range; the voltage value of the second voltage range is less than the voltage value of the fourth voltage range.

[0020] Based on the above technical means, for the second type of abnormality, since the output current of the DC converter under the second type is greater than the output current upper limit, that is, the demand is large, it is necessary to supply power through the DC converter and the battery together, so as to meet the power supply demand as much as possible, and detect the output voltage of the battery in real time. If the output voltage of the battery belongs to the second voltage range, it is necessary to limit some vehicle functions to meet the power supply demand, and it is also necessary to remind that the battery voltage is low. If the output voltage of the battery belongs to the third voltage range, it is necessary to limit some vehicle functions to meet the power supply demand, and it is also necessary to remind the power system to stop safely. In this way, the needs of various voltage scenarios are met, and the user experience is high.

[0021] In a second aspect, the present application provides a vehicle control device, the device comprising:

[0022] An acquisition unit, used for acquiring an output current of a DC converter in a power supply system of a vehicle;

[0023] a determination unit, for determining a vehicle state and an abnormality type of the vehicle in case of an abnormal output current;

[0024] The control unit is used to control the vehicle based on at least the vehicle state and the abnormality type.

[0025] In a third aspect, the present application further provides a vehicle, comprising a processor and a memory, wherein the memory stores a computer program or instructions, and the computer program or instructions, when executed by the processor, implement the method provided in the first aspect.

[0026] In a fourth aspect, the present application further provides a storage medium having a computer program or instruction stored thereon, and the computer program or instruction, when executed by a processor, implements the method provided in the first aspect above.

[0027] In a fifth aspect, the present application also provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed by a processor, the method provided in the first aspect is implemented.

[0028] It should be noted that the technical effects of the second to fifth aspects can refer to the detailed description of the first aspect above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An optional structural schematic diagram of a vehicle charging and discharging system provided in an embodiment of the present application;

[0030] Figure 2 A first optional flow chart of a vehicle control method provided in an embodiment of the present application;

[0031] Figure 3 A second optional flow chart of the vehicle control method provided in the embodiment of the present application;

[0032] Figure 4 A third optional flow chart of the vehicle control method provided in the embodiment of the present application;

[0033] Figure 5 A fourth optional flow chart of the vehicle control method provided in the embodiment of the present application;

[0034] Figure 6 A fifth optional flow chart of the vehicle control method provided in the embodiment of the present application;

[0035] Figure 7 A sixth optional flow chart of the vehicle control method provided in the embodiment of the present application;

[0036] Figure 8 Another optional structural diagram of the charging and discharging system provided in the embodiment of the present application;

[0037] Fig. 9 An optional flow chart of a low voltage power supply management strategy provided in an embodiment of the present application;

[0038] Fig.10 An optional structural schematic diagram of a vehicle control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0040] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0041] In the following description, the terms "first\second\third" are used only as examples to distinguish different objects, and do not represent a specific order for the objects, nor do they have a limitation on the order of precedence. It is understandable that "first\second\third" can be interchanged with a specific order or order of precedence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0043] The embodiments of the present application provide a vehicle control method, device, vehicle, medium and product. The vehicle control method is executed by a vehicle control device, and the vehicle control device can be deployed in the vehicle. Below, various embodiments of the vehicle control method, device, vehicle, medium and product provided in the embodiments of the present application are described.

[0044] To facilitate understanding, the structure of the vehicle's charging and discharging system is first described.

[0045] refer to Figure 1 As shown, the system includes: a power battery 101, a power supply system 102, an AC discharge socket 103, a charge and discharge interface 104, a low-voltage load 105, a storage battery 106 and a controller 107.

[0046] The charge and discharge interface 104 can receive electrical energy and supply power to the power battery 101 through the power supply system 102 .

[0047] The power battery 101 can supply power to the AC discharge socket 103 through the power supply system 102 .

[0048] The power battery 101 can supply power to the low-voltage load 105 through the power supply system 102 .

[0049] The power battery 101 can supply power to the storage battery 106 through the power supply system 102 .

[0050] The battery 106 can supply power to the low voltage load 105 .

[0051] The controller 107 can be used for power management and distribution of the power supply system 102 .

[0052] The embodiment of the present application does not limit the voltage of the low-voltage load and the battery, and can be configured according to actual needs. For example, the voltage of the low-voltage load and the battery here can be 14.5 volts (volt, V).

[0053] In a first aspect, an embodiment of the present application provides a method for controlling a vehicle, and the method is described by taking a vehicle as an execution subject.

[0054] refer to Figure 2 As shown in the content, the process may include but is not limited to S201 to S203.

[0055] S201. Obtain an output current of a DC converter in a power supply system of a vehicle.

[0056] The vehicle here is an electric vehicle with a charging function. The embodiment of the present application does not limit the specific type of the electric vehicle, and can be configured according to actual needs. For example, the vehicle may include a hybrid vehicle or a pure electric vehicle.

[0057] The power supply system includes: a bidirectional on-board charger (OBC) and a DC / DC converter (Direct Current-Direct Current, DCDC).

[0058] The on-board charger is used to power the high-voltage battery.

[0059] The output current of the DC converter in the power supply system can be used for at least one of the following: supplying power to a low-voltage load, or charging a battery.

[0060] The factors affecting the output current of the DC converter in the power supply system include: the working power of the bidirectional on-board charger. The influencing factors may also include: the power supply demand of the low-voltage load, the voltage of the battery, etc.

[0061] In a possible implementation, the vehicle directly reads the current to be output calculated by the DC converter, or the current value output in real time.

[0062] In another possible implementation, the vehicle detects the output current of the DC converter through a current detection device. The detection here can be direct detection or indirect detection.

[0063] S202: When the output current is abnormal, determine the vehicle state and abnormality type of the vehicle.

[0064] The output current is abnormal, which means that the output current is 0A or exceeds the upper limit of the output current.

[0065] The embodiment of the present application does not limit the specific division method of the vehicle status and can be configured according to actual needs.

[0066] In a possible implementation, the vehicle status may include, but is not limited to: a driving status and a parking status.

[0067] In another possible implementation, the vehicle state may include, but is not limited to: a parking state, a low-speed driving state, a high-speed driving state, and the like.

[0068] The embodiment of the present application does not limit the method of determining the vehicle state, and can be configured according to actual needs. For example, the vehicle state can be determined by reading the current gear information of the vehicle, or by reading or detecting the current vehicle speed and other information to determine the vehicle state.

[0069] The embodiment of the present application does not limit the specific classification method of the exception types and can be configured according to actual needs.

[0070] In a possible implementation, the abnormal type may include a first type and a second type. In the first type, the output current of the DC converter is zero; in the second type, the output current of the DC converter is greater than the output current upper limit.

[0071] In another possible implementation, the abnormal type may include: a first type, a second type, a third type, and a fourth type, etc. In the third type, the output current of the DC converter is greater than zero and less than the output current upper limit; in the fourth type, the output current of the DC converter is greater than the output current upper limit.

[0072] After obtaining the output current of the DC converter, the vehicle matches the output current with pre-configured conditions of various abnormal types to determine the abnormal type.

[0073] S203: Control the vehicle based on at least the vehicle state and the abnormality type.

[0074] In a possible implementation, the vehicle may be controlled based on the vehicle state and the abnormality type. For example, for a first type of abnormality in the parking state, the vehicle may be controlled to sleep after a first time period.

[0075] In another possible implementation, the vehicle can be controlled based on parameters such as the vehicle state, the abnormality type, and the duration. For example, for a first type of abnormality in the parking state, after the abnormality time reaches a threshold, the vehicle is controlled to sleep after a first duration. This effectively prevents abnormalities caused by short-term turbulence, which can sometimes recover on their own without special processing.

[0076] The vehicle is pre-configured with processing methods for different types of exceptions under different vehicle states, and then after determining the current vehicle state and exception type, the corresponding processing method is called to control the vehicle.

[0077] The control of the vehicle here may include one or more of the following: power supply to low-voltage loads in the vehicle, the vehicle's driving speed, whether the vehicle is in sleep mode, whether the vehicle needs to limit certain functions, the vehicle's reminder information, etc.

[0078] It can be seen that in this embodiment, the method includes: detecting the output current of the DC converter of the vehicle; in the case of abnormal output current, determining the vehicle state and abnormality type of the vehicle; and controlling the vehicle at least based on the vehicle state and abnormality type.

[0079] Based on the above technical means, the output current of the DC converter can be continuously detected. When the output current is detected to be abnormal, the current vehicle state and the abnormality type are determined, and then the vehicle is controlled in a manner corresponding to the current vehicle state and the abnormality type. In this way, the control method may be the same or different for different vehicle states, and the control method may be the same or different for different abnormality types. This solution can meet the vehicle control requirements under various vehicle states and abnormal scenarios, reduce the impact of current abnormalities on user experience, and improve user experience.

[0080] The following describes how to handle different exception types.

[0081] In some embodiments, the abnormal type includes a first type, in which the output current of the DC converter is zero.

[0082] refer to Figure 3 As shown in the content, the process may include but is not limited to the following S301 and S302.

[0083] S301: If the vehicle is in a parking state, power is supplied to a low-voltage load of the vehicle through the vehicle's battery, a first prompt message is output, and the vehicle is controlled to enter a dormant state after a first period of time.

[0084] The first prompt information is used to prompt that the vehicle's power system is abnormal.

[0085] The embodiment of the present application does not limit the expression form of the first prompt information, and can be configured according to actual needs. For example, the first prompt information can be a voice prompt or a text prompt or a fault light prompt, etc. Of course, in order to improve the level and effect of the reminder, the prompt can also be performed in multiple ways.

[0086] Since the output current of the DC converter is zero in the first type, the low-voltage load of the vehicle can only be powered by the battery. However, the power supply capacity of the battery is limited, and the vehicle is in a parking state, so the vehicle is controlled to enter a dormant state after the first time period to save power. At the same time, the user is reminded of the current power system abnormality through the first prompt information, so that the user can perceive it as soon as possible.

[0087] The first duration can be configured according to actual conditions. For example, the first duration can be 30 seconds.

[0088] In sleep mode, unnecessary functions of the vehicle (such as high-energy-consuming devices) are restricted, and only the wake-up function is retained, so that it can be woken up at any time.

[0089] S302: If the vehicle is in a driving state, the output voltage of the battery is obtained, and the vehicle is controlled based on the output voltage of the battery.

[0090] If the vehicle is in a driving state, the vehicle state cannot be changed quickly, so the vehicle is controlled by the output voltage of the battery. Specifically, different voltage levels can be divided, and the power supply capacity of the battery can be measured by the voltage level, and the vehicle can be controlled based on different power supply capacities.

[0091] In practice, if a fault occurs in the DCDC, or the DCDC is in operation but the connection between the output terminal and the 12V battery is broken, and no current flows to the battery, a first type of abnormality will occur.

[0092] Based on the above technical means, for the first type of abnormality, since the output current of the DC converter is zero under the first type, the battery is used for low-voltage power supply to ensure the basic power supply demand of the vehicle, and then for the parking state, the vehicle is directly controlled to enter the dormant state after the first time length of the first prompt information is output, thereby reducing the power demand; for the driving state, the specific control method needs to be determined according to the output voltage value of the battery. It can be seen that this embodiment can meet the control requirements of various vehicle states under the first type of abnormality.

[0093] Next, the process of obtaining the output voltage of the battery if the vehicle state is the running state in S302 and controlling the vehicle based on the output voltage of the battery will be described.

[0094] refer to Figure 4As shown in the content, the process may include but is not limited to the following S401 to S403.

[0095] S401: If the output voltage of the battery belongs to the first voltage range, the low-voltage load of the vehicle is powered by the battery to control normal driving and operation of the vehicle.

[0096] The first voltage range refers to the operating voltage range of the battery. For example, the first voltage range here may be greater than 11.5V.

[0097] In the first voltage range, the battery supplies power to all low-voltage loads of the vehicle to maintain the current driving state and operating parameters of the vehicle. In this case, the current vehicle state and operating parameters can be maintained, thereby ensuring user experience.

[0098] S402: If the output voltage of the battery belongs to the second voltage range, the low-voltage load of the vehicle is powered by the battery to control the normal driving and operation of the vehicle; and a second prompt message is output.

[0099] The second prompt information is used to indicate that the battery voltage is low.

[0100] The voltage value in the first voltage range is greater than the voltage value in the second voltage range.

[0101] For example, the second voltage range may be 9.5V to 11.5V.

[0102] Compared with the first voltage range, in the second voltage range, the battery can maintain the vehicle's driving status and working parameters for a period of time, but cannot maintain it for a long time, so it is necessary to increase the output of the second prompt information to remind the user that the battery voltage is low and to remind the user to deal with it as soon as possible.

[0103] The embodiment of the present application does not limit the reminder method of the second reminder information, and can be configured according to actual needs. For example, the second reminder information can be reminded in one or more ways such as voice, text or indicator light.

[0104] S403: If the output voltage of the battery belongs to the third voltage range, the low-voltage load of the vehicle is powered by the battery, the driving speed of the vehicle is limited, and a third prompt message is output.

[0105] The third prompt message is used to indicate that the vehicle's power system is abnormal. Please stop the vehicle safely.

[0106] The voltage value of the second voltage range is greater than the voltage value of the third voltage range.

[0107] In the third voltage range, the battery cannot maintain the current operating parameters of the vehicle, so the vehicle speed needs to be limited and the third reminder message is output. The third reminder message is used to remind the vehicle's power system to be abnormal, please stop safely. You can also further remind customer service.

[0108] For example, the third voltage range may be less than 9.5V.

[0109] Based on the above technical means, for the first type of abnormal and driving state of the vehicle, this embodiment classifies the output voltage of the battery, and adopts different control methods for different voltage ranges, which can meet the vehicle control requirements while not affecting the performance of the battery. When the battery voltage is in the first voltage range, the battery power is sufficient, so there is no function restriction. When the battery voltage is in the second voltage range, the battery power is not sufficient, so it is necessary to remind that the battery power is low. When the battery voltage is in the third voltage range, the battery power is low, so the speed is limited and the power system is abnormal. Please stop safely. In this way, the battery will not be fed, and the vehicle control requirements will be met as much as possible according to the power, and the user experience is high.

[0110] In some embodiments, the abnormal type includes a second type, in which the output current of the DC converter is greater than the output current upper limit.

[0111] refer to Figure 5 As shown in the content, the control process under the second type may include but is not limited to the following S501 and S502. Wherein, under the second type, the output current of the DC converter is greater than the output current upper limit.

[0112] S501 . Monitor the output voltage of the battery of the vehicle.

[0113] The vehicle uses a voltage detection device to detect the output voltage of the battery in real time. The detection here can be direct detection or indirect detection.

[0114] S502: If the output voltage belongs to the fourth voltage range, limiting the first target function of the vehicle based on the vehicle state; and supplying power to the vehicle through the DC converter and the battery to control the vehicle.

[0115] The fourth voltage range here may be 11.5V to 12.7V.

[0116] The output voltage belongs to the fourth voltage range. At present, the battery is not charged but discharged to consume electricity, causing the voltage to start to drop. In the second type, the actual current demand is greater than the output current of the DC converter, that is, the demand is large. At this time, on the one hand, the DC converter and the battery are used to supply power to the low-voltage load of the vehicle to control the vehicle; on the other hand, the first target function is limited to reduce the power demand by limiting the first function.

[0117] The embodiment of the present application does not limit the function type of the first target function and can be configured according to actual needs.

[0118] In a possible implementation manner, the restricted first target function may be a configured fixed function.

[0119] In another possible implementation, the first target function of the restriction can be adjusted according to different conditions, that is, it can also be a dynamically changing function.

[0120] The limitation here can be to limit the output gear, reduce the output power, or to shut down the power supply to achieve the shutdown of the function.

[0121] If the low-voltage load is short-circuited or the internal hardware of the DCDC is damaged, the second type of abnormality will occur. Under normal circumstances, when the 12V load demand exceeds the DCDC capacity, the DCDC outputs according to its maximum capacity and supplies power to the low-voltage load together with the 12V battery.

[0122] Based on the above technical means, for the second type of abnormality, since the output current of the DC converter under the second type is greater than the output current upper limit, that is, the demand is large, it is necessary to supply power through the DC converter and the battery together, so as to meet the power supply demand as much as possible, and detect the output voltage of the battery in real time. If the output voltage of the battery belongs to the fourth voltage range, it is necessary to limit some vehicle functions to meet the power supply demand. This avoids the situation where the vehicle control abnormality caused by the large demand cannot be met, and improves the user experience.

[0123] Next, the process of limiting the first target function of the vehicle based on the vehicle state and supplying power to the vehicle through the DC converter and the battery to control the vehicle in S502 if the output voltage belongs to the fourth voltage range will be described.

[0124] refer to Figure 6 As shown in the content, the process may include but is not limited to the following S601 and S602.

[0125] S601: If the time during which the output voltage is within the fourth voltage range is less than or equal to a second time period, limit a first function of the vehicle based on a vehicle state.

[0126] The embodiment of the present application does not limit the value of the second duration, and can be configured according to actual needs. For example, the second duration can be 5 minutes.

[0127] The first function may be a function that is not particularly necessary for the vehicle at present.

[0128] S602: If the time for which the output voltage is within the fourth voltage range is greater than the second time period and less than the third time period, limit the second function of the vehicle based on the vehicle state.

[0129] The first function is different from the second function, and the third duration is greater than the second duration.

[0130] The embodiment of the present application does not limit the value of the third duration, and can be configured according to actual needs. For example, the third duration can be 10 minutes.

[0131] Compared with the first function, the second function has a smaller demand for the vehicle at present, so it can be restricted first, and the second function has a slightly larger demand, so it can be restricted later.

[0132] The first function and the second function can be pre-configured fixed functions, or adjusted values ​​determined in real time based on certain parameters. Fixed values ​​are easy to implement, and adjusted values ​​can meet current needs and are more in line with expectations.

[0133] Based on the above technical means, the duration of the output voltage in the fourth voltage range is monitored in real time, and the duration is divided into two duration ranges. If the duration is less than or equal to the first duration, the first function is restricted, and if it is greater than the first duration and less than the second duration, the second function is restricted. In this way, the first function and the second function can be restricted in stages for different durations, thereby ensuring the functions of the vehicle as much as possible to improve the user experience.

[0134] In practice, time can be divided into three or more stages, with each stage corresponding to the restriction of a part of the functions. The finer the division, the less impact on users and the better the experience.

[0135] Next, the first function and the second function are described.

[0136] If the vehicle is in a driving state, the first function includes an AC discharge function; the second function includes a non-power-controlled low-voltage load control function; if the vehicle is in a parking state, the first function includes a non-power-controlled low-voltage load control function; the second function includes an AC discharge function.

[0137] The control function of the low-voltage load limited here does not include the power control function, so as not to affect the power system of the vehicle.

[0138] For example, the non-power-controlled low-voltage load control functions may include: seat heating function gear, aromatherapy gear, air conditioning gear, etc.

[0139] The vehicle can limit the output power or gear of the function by limiting the current of the power supply, or it can turn off these functions by stopping the power supply.

[0140] Based on the above technical means, for the AC discharge function and the non-power-controlled low-voltage load control function, since the driving state may have a stronger demand for the non-power-controlled low-voltage load control function, the AC discharge function is limited first, and then the non-power-controlled low-voltage load control function is further limited; since the parking state may have a weaker demand for the non-power-controlled low-voltage load control function, the non-power-controlled low-voltage load control function is limited first, and then the AC discharge function is further limited. This restriction method is more in line with actual needs, so the user experience is higher.

[0141] The control process under the second type may also include but is not limited to Figure 7 S503 and S504 are shown. Wherein, in the second type, the output current of the DC converter is greater than the output current upper limit.

[0142] S503: If the output voltage belongs to the second voltage range, limiting the second target function of the vehicle; supplying power to the vehicle through the DC converter and the battery, and outputting a second prompt message.

[0143] The second prompt information is used to indicate that the battery voltage is low.

[0144] Compared with the fourth voltage range, the voltage in the second voltage range will be lower, indicating that the battery voltage has dropped a lot. Therefore, on the basis of limiting the second target function of the vehicle and powering the vehicle through the DC converter and the battery, it is also necessary to output a second prompt message to remind that the battery power is low.

[0145] S504: If the output voltage belongs to the third voltage range, the second target function of the vehicle is limited; the vehicle is powered by the DC converter and the battery, the driving speed of the vehicle is limited, and a third prompt message is output.

[0146] The third prompt message is used to indicate that the vehicle's power system is abnormal. Please stop the vehicle safely.

[0147] Among them, the voltage value of the third voltage range is smaller than the voltage value of the second voltage range; the voltage value of the second voltage range is smaller than the voltage value of the fourth voltage range.

[0148] Compared with the second voltage range, the voltage in the third voltage range will be lower, indicating that the battery voltage is already low. Therefore, on the basis of limiting the second target function of the vehicle and powering the vehicle through the DC converter and the battery, the vehicle speed is limited and the third reminder information is output.

[0149] Based on the above technical means, for the second type of abnormality, since the output current of the DC converter under the second type is greater than the output current upper limit, that is, the demand is large, it is necessary to supply power through the DC converter and the battery together, so as to meet the power supply demand as much as possible, and detect the output voltage of the battery in real time. If the output voltage of the battery belongs to the second voltage range, it is necessary to limit some vehicle functions to meet the power supply demand, and it is also necessary to remind that the battery voltage is low. If the output voltage of the battery belongs to the third voltage range, it is necessary to limit some vehicle functions to meet the power supply demand, and it is also necessary to remind the power system to stop safely. In this way, the needs of various voltage scenarios are met, and the user experience is high.

[0150] It should be noted that in the process of handling the second type of abnormality, the output current of the DC converter and the output voltage of the battery are still detected in real time. If the processing conditions of the first type are met, the processing of the first type is switched to the processing process at any time. That is, in this application, each processing process is dynamically adjusted to meet real-time control requirements.

[0151] Below, taking a pure electric vehicle as an example, the vehicle control process provided by this embodiment of the present application is explained.

[0152] After the high voltage is applied to the whole vehicle, hybrid vehicles and pure electric vehicles need to use the DC converter assembly (DCDC) to power the 12V low-voltage load and 12V battery of the whole vehicle. With the development of vehicle intelligence, the 12V load is increasing, and the demand for DCDC conversion power is increasing. Considering the hardware cost, the DCDC power will not increase indefinitely; and when selecting DCDC, in order to achieve the ultimate cost, DCDC is integrated with the on-board bidirectional charger (OBC) to become a power supply system (PDU), sharing the power tube, resulting in the maximum power of DCDC being limited when the PDU uses the charging or discharging function. Therefore, it is very important to reasonably select DCDC based on the balance between cost and vehicle power consumption.

[0153] Considering the hardware cost of DCDC and the power balance of the whole vehicle, under some working conditions, the 12V battery is allowed to supply power to the 12V low-voltage load together with the DCDC, and even the 12V load of the whole vehicle is limited to ensure that the voltage cannot be lower than the protection value when the 12V battery is balanced. The low-voltage energy management method and device with patent number CN116533902A: adjust the 12V load power according to the available power of DCDC and the 12V battery, and adjust the 12V load differently according to different thresholds to avoid user discomfort caused by sudden changes in functional status. However, the battery power calculation is complicated, and there may be virtual electricity in the battery, resulting in inaccurate calculations. The single means of limiting the 12V load does not analyze the situation where the demand is still not met after dynamic adjustment, and there are no countermeasures in the event of system failure.

[0154] This embodiment uses the DCDC output current and the 12V battery voltage to decide whether to limit the 12V load of the vehicle or stop the discharge function to ensure that the 12V power system load is not affected, the vehicle can operate normally, and the customer experience is improved; or in the event of a fault, the 12V battery can retain power and wait for rescue.

[0155] The purpose of this embodiment is to allow the 12V battery to continue discharging for a certain period of time to meet the 12V load demand and ensure that the power of the vehicle is not limited when the maximum output power of the DCDC does not meet the 12V load power of the vehicle. According to the working conditions of the vehicle, it is determined whether to stop the discharge function to increase the DCDC power or to limit the 12V load to reduce the impact on the customer's experience.

[0156] The low voltage management system includes: system controller VIU, 12V battery, power supply system assembly PDU, and vehicle 12V load. The vehicle interface unit (VIU) limits the discharge function or 12V load power according to the detected battery voltage and the output current fed back by the DCDC to ensure that the 12V battery is not fed.

[0157] The control strategy is as follows:

[0158] After VIU detects high voltage on the vehicle, it sends a work instruction to DCDC, and DCDC enters the working mode. VIU continuously detects the 12V battery voltage and receives the output current signal of DCDC and makes judgments. When the DCDC output current is 0A, if the vehicle is in the parking state, the text prompt on the central control display screen of the vehicle: "Power system abnormality, please stop safely" lasts for 30S, and the vehicle lowers the high voltage and enters sleep mode; if the vehicle is in the driving state, the 12V battery voltage is judged. When the 12V battery voltage is lower than 11.5V and higher than 9.5V, the battery fault light is on, and the text prompt "12V battery voltage is too low"; when the 12V battery voltage is lower than 9.5V, the system fault light is on, and the text prompt "Power system abnormality, please stop safely, contact customer service" is displayed, and the vehicle speed is limited.

[0159] When the DCDC output current exceeds the design value I1 or the 12V battery voltage is between 11.5V and 12.7V for a certain period of time T1, VIU determines that the vehicle is in driving state, and the in-vehicle discharge function is turned off first; if the DCDC output current is still greater than I1 or the 12V battery voltage is between 11.5V and 12.7V for a certain period of time T2, the 12V low-voltage load of the vehicle is limited (limiting the seat heating function gear, aromatherapy gear, air conditioning gear and other loads that are less perceived by customers). During the T1 and T2 time periods, the DCDC output current and 12V battery voltage are detected in real time: if the 12V battery voltage is lower than 11.5V and higher than 9.5V, the battery fault light is on, and the text prompt "12V battery voltage is too low"; if the 12V battery voltage is lower than 9.5V, the system fault light is on, the text prompt "Power system abnormality, please stop safely and contact customer service", and the vehicle speed is limited.

[0160] When the DCDC output current exceeds the design value I1 or the 12V battery voltage is between 11.5V and 12.7V for a certain period of time T1, the VIU determines that the vehicle is in the parking state, and then prioritizes limiting the vehicle's 12V low-voltage load (limiting the seat heating function gear, aromatherapy gear, air conditioning gear and other loads that are less perceived by customers); if it continues for a certain period of time T2, the DCDC output current is still greater than I1 or the 12V battery voltage is between 11.5V and 12.7V, then the discharge function is turned off. During the T1 and T2 time periods, the DCDC output current and 12V battery voltage are detected in real time: if the DCDC output current is 0A, the vehicle's central control display screen will display a text prompt: "12V battery voltage is too low" for 30S, and then the vehicle will reduce the high voltage and enter sleep. If the 12V battery voltage is lower than 11.5V and higher than 9.5V, the battery fault light will be on, and a text prompt will be displayed saying "12V battery voltage is too low"; if the 12V battery voltage is lower than 9.5V, the system fault light will be on, and a text prompt will be displayed saying "Power system abnormality, please stop safely and contact customer service", and the vehicle speed will be limited.

[0161] The charging and discharging system can refer to Figure 8 As shown in the content, this embodiment is applied to a pure electric vehicle or a plug-in hybrid vehicle, including an in-vehicle discharge socket 801, an out-vehicle charge and discharge port 802, a 12V load 803, a power supply system assembly 804, a 12V battery 805, a system controller VIU 806, and a high-voltage DC battery 807.

[0162] The PDU has four ports. Port 1 is connected to the high-voltage DC battery, port 2 is connected to the charging and discharging port outside the vehicle and the discharge socket inside the vehicle, port 3 is connected to the 12V battery and 12V load, and port 4 is connected to the VIU for low-voltage communication. The VIU is connected to the high-voltage DC battery for low-voltage communication.

[0163] refer to Fig. 9 The content shown is that the low-voltage power management strategy of this embodiment may include but is not limited to the following S9-1 to S9-18.

[0164] S9-1. High voltage on the whole vehicle.

[0165] The whole vehicle is high voltage and DCDC enters working mode.

[0166] S9-2, determine whether the DCDC output current is 0A.

[0167] The system controller VIU receives the output current signal of the DCDC and determines whether the DCDC output current value is 0A. If so, it enters S9-3, otherwise it enters S9-8.

[0168] S9-3, determining whether the vehicle is in a parking state.

[0169] Confirm whether the vehicle is in the parking state. If so, enter S9-4, otherwise enter S9-5.

[0170] S9-4, text prompt: "Power system abnormality, please stop safely" lasts for 30 seconds, then the vehicle lowers the high voltage and enters sleep mode.

[0171] The text prompt on the central control display screen: "Power system abnormality, please stop safely" lasts for 30 seconds, and then the whole vehicle automatically reduces the high voltage and enters sleep mode.

[0172] S9-5. Determine whether 9.5V≤battery voltage≤11.5V is satisfied for 5s.

[0173] The system controller VIU detects the 12V battery voltage. If the 12V battery voltage is between 9.5V and 11.5V and lasts for a certain period of time, it enters S9-6, otherwise it enters S9-7.

[0174] S9-6: The battery fault light on the central control display screen is on and the text prompt is: "12V battery voltage is too low".

[0175] S9-7, battery voltage ≤ 9.5V for 5s, the system fault indicator light is on; text prompt: "Power system abnormality, please stop safely and contact customer service"; and the speed is limited.

[0176] The system controller VIU detects the 12V battery voltage. If the 12V battery voltage is less than or equal to 9.5V and lasts for a certain period of time, the system fault indicator light on the central control display screen lights up, and the text prompt says: "Power system abnormality, please stop safely and contact customer service", and the vehicle speed is limited.

[0177] When the vehicle is connected to high voltage, DCDC works normally and the output current is not 0A, then enter S9-8.

[0178] S9-8, determine whether 0<DCDC output current ≤ design value I1; and battery voltage>12.7V.

[0179] The system controller VIU determines the range of the DCDC output current and the 12V battery voltage, and determines whether the condition "the DCDC output current is between 0A and the design value I1 and the 12V battery voltage is greater than 12.7V" is met. If so, it goes to S9-9, otherwise it goes to S9-10.

[0180] S9-9. Determine whether the vehicle is under high voltage.

[0181] The system controller VIU determines whether the whole vehicle is normally on high voltage. If the whole vehicle is on high voltage, it returns to S9-2, otherwise the process ends.

[0182] S9-10, determine whether the DCDC output current > design value I1; or 11.5V ≤ battery voltage < 12.7V "continues for 5 minutes.

[0183] During this time, (1) if the DCDC output current is 0A, transfer to step S9-3; (2) if the DCDC output current is not 0A and 9.5V≤battery voltage≤11.5V, enter step S9-5; (3) if the DCDC output current is not 0A and the battery voltage is ≤9.5V, enter step S9-7.

[0184] The system controller VIU determines the range of the DCDC output current and the 12V battery voltage. If the DCDC output current is greater than the design value I1 or the 12V battery voltage is between 11.5V and 12.7V and lasts for 5 minutes, it enters S9-11, otherwise it returns to S9-5. Within 5 minutes, if the DCDC output current is 0A, it transfers to S9-3; if the DCDC output current is not 0A and the battery voltage is 9.5V≤battery voltage≤11.5V, it enters S9-5; if the DCDC output current is not 0A and the battery voltage is ≤9.5V, it enters S9-7.

[0185] S9-11. Determine whether the vehicle is in a driving state.

[0186] The system controller VIU confirms the status of the vehicle. If the vehicle is in driving state, it enters S9-12; if the vehicle is in parking state, it enters S9-16.

[0187] S9-12, stop the DCAC discharge function and start timing. During the timing process, the DCDC output current and the 12V battery voltage are detected in real time: (1) If the DCDC output current is 0A, transfer to step S9-3; (2) If the DCDC output current is not 0A and the battery voltage is 9.5V≤11.5V, enter step S9-5; (3) If the DCDC output current is not 0A and the battery voltage is ≤9.5V, enter step S9-7.

[0188] Stop the DCAC discharge function and start timing. During the timing process, the DCDC output current and the 12V battery voltage are detected in real time: if the DCDC output current is 0A, transfer to S9-3; if the DCDC output current is not 0A and the battery voltage is 9.5V≤11.5V, enter S9-5; if the DCDC output current is not 0A and the battery voltage is ≤9.5V, enter S9-7.

[0189] S9-13. After 5 minutes of timing, is the DCDC output current greater than the design value I1 or the battery voltage less than 12.7V?

[0190] After a certain time has passed, if the condition of "DCDC output current > design value I1; or 11.5V≤battery voltage <12.7V" is met, then enter S9-14, otherwise enter S9-15.

[0191] S9-14, limit 12V load power and return to step S9-9.

[0192] S9-15. Return to step S9-9.

[0193] When the S9-11 system controller determines that the vehicle is in a non-driving state, it enters S9-16.

[0194] S9-16, limit the 12V load power and start timing. During the timing process, the DCDC output current and the 12V battery voltage are detected in real time: (1) If the DCDC output current is 0A, transfer to step S9-3; (2) If the DCDC output current is not 0A and the battery voltage is 9.5V≤11.5V, enter step S9-5; (3) If the DCDC output current is not 0A and the battery voltage is ≤9.5V, enter step S9-7.

[0195] Limit the 12V load power, reduce the vehicle load and start timing. During the timing process, the DCDC output current and 12V battery voltage are detected in real time: if the DCDC output current is 0A, transfer to S9-3; if the DCDC output current is not 0A, 9.5V≤battery voltage≤11.5V, enter S9-5; if the DCDC output current is not 0A and the battery voltage is ≤9.5V, enter S9-7.

[0196] S9-17, after 5 minutes of timing, whether the DCDC output current is greater than the design value I1; or the battery voltage is 11.5V≤<12.7V.

[0197] After a certain time has passed, if the condition of "DCDC output current > design value I1; or 11.5V≤battery voltage < 12.7V" is met, then enter S9-18, otherwise return to S9-9.

[0198] S9-18, stop the DCAC discharge function.

[0199] In a second aspect, an embodiment of the present application provides a vehicle control device. The vehicle control device can be deployed in a vehicle. Fig.10 As shown in the content, the vehicle control device 100 may include but is not limited to: an acquisition unit 1001, a determination unit 1002 and a control unit 1003.

[0200] An acquisition unit 1001 is used to acquire an output current of a power distribution unit PDU of a vehicle;

[0201] The determination unit 1002 is used to determine the vehicle state and abnormality type of the vehicle when the output current is abnormal;

[0202] The control unit 1003 is used to control the vehicle based on at least the vehicle state and the abnormality type.

[0203] In some embodiments, when the abnormality type includes the first type, the control unit 1003 is used to: if the vehicle is in a parking state, power is supplied to the low-voltage load of the vehicle through the vehicle's battery, a first prompt message is output, and the vehicle is controlled to enter a sleep state after a first period of time; the first prompt message is used to prompt that the vehicle's power system is abnormal; if the vehicle is in a driving state, the output voltage of the battery is obtained, and the vehicle is controlled based on the output voltage of the battery; wherein, under the first type, the output current of the DC converter is zero.

[0204] In some embodiments, the control unit 1003 is further configured to:

[0205] If the output voltage of the battery belongs to the first voltage range, the low-voltage load of the vehicle is powered by the battery to control the normal driving and operation of the vehicle; if the output voltage of the battery belongs to the second voltage range, the low-voltage load of the vehicle is powered by the battery to control the normal driving and operation of the vehicle; and a second prompt message is output; the second prompt message is used to indicate that the battery voltage is low; if the output voltage of the battery belongs to the third voltage range, the low-voltage load of the vehicle is powered by the battery, the vehicle's driving speed is limited, and a third prompt message is output; the third prompt message is used to indicate that the vehicle's power system is abnormal, please stop the car safely; wherein, the voltage value of the first voltage range is greater than the voltage value of the second voltage range, and the voltage value of the second voltage range is greater than the voltage value of the third voltage range.

[0206] In some embodiments, when the exception type includes the second type, the control unit 1003 is configured to:

[0207] Monitor the output voltage of the battery of the vehicle; if the output voltage falls within a fourth voltage range, limit the first target function of the vehicle based on the vehicle state; supply power to the vehicle through a DC converter and a battery to control the vehicle; wherein, under the second type, the output current of the DC converter is greater than the output current upper limit.

[0208] In some embodiments, the control unit 1003 is further configured to:

[0209] If the time during which the output voltage belongs to the fourth voltage range is less than or equal to the second time duration, the first function of the vehicle is limited based on the vehicle status; if the time during which the output voltage belongs to the fourth voltage range is greater than the second time duration and less than the third time duration, the second function of the vehicle is limited based on the vehicle status; the first function is different from the second function, and the third time duration is greater than the second time duration.

[0210] In some embodiments, the control unit 1003 is further configured to:

[0211] If the vehicle is in a driving state, the first function includes an AC discharge function; the second function includes a non-power-controlled low-voltage load control function; if the vehicle is in a parking state, the first function includes a non-power-controlled low-voltage load control function; the second function includes an AC discharge function.

[0212] In some embodiments, the control unit 1003 is further configured to:

[0213] If the output voltage belongs to the second voltage range, the second target function of the vehicle is limited; the vehicle is powered by a DC converter and a battery, and a second prompt message is output; the second prompt message is used to indicate that the battery voltage is low; if the output voltage belongs to the third voltage range, the second target function of the vehicle is limited; the vehicle is powered by a DC converter and a battery, the vehicle's driving speed is limited, and a third prompt message is output; the third prompt message is used to indicate that the vehicle's power system is abnormal and please stop safely; wherein, the voltage value of the third voltage range is less than the voltage value of the second voltage range; the voltage value of the second voltage range is less than the voltage value of the fourth voltage range.

[0214] In a third aspect, the present application further provides a vehicle, comprising a processor and a memory, wherein the memory stores a computer program or instructions, and the computer program or instructions, when executed by the processor, implement the method provided in the first aspect.

[0215] In a fourth aspect, an embodiment of the present application provides a storage medium, that is, a computer-readable storage medium, on which a computer program or instructions are stored. When the computer program or instructions are executed by a processor, the method provided in the first aspect above is implemented.

[0216] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed by a processor, the method provided in the first aspect is implemented.

[0217] It should be noted here that the description of the above storage medium, device, and program product embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium, device, apparatus, and program product embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0218] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in some embodiments" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0219] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0220] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0221] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0222] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0223] A person skilled in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, etc., various media that can store program codes.

[0224] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can essentially or in other words, the part that contributes to the relevant technology can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0225] The above description is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A vehicle control method, characterized in that: The method comprises: Obtaining the output current of the DC converter in the vehicle's power supply system; In case the output current is abnormal, determining a vehicle state and an abnormality type of the vehicle; Based at least on the vehicle state and the abnormality type, the vehicle is controlled.

2. The method according to claim 1, characterized in that In the case where the abnormality type includes the first type, controlling the vehicle based at least on the vehicle state and the abnormality type comprises: If the vehicle is in a parking state, power is supplied to the low-voltage load of the vehicle through the storage battery of the vehicle, a first prompt message is output, and the vehicle is controlled to enter a dormant state after a first time period; the first prompt message is used to prompt that the power system of the vehicle is abnormal; If the vehicle state is a driving state, obtaining the output voltage of the battery, and controlling the vehicle based on the output voltage of the battery; Wherein, in the first type, the output current of the DC converter is zero.

3. The method according to claim 2, characterized in that The controlling the vehicle based on the output voltage of the battery comprises: If the output voltage of the battery belongs to the first voltage range, the low-voltage load of the vehicle is powered by the battery to control the normal driving and operation of the vehicle; If the output voltage of the battery belongs to the second voltage range, the low-voltage load of the vehicle is powered by the battery to control the normal driving and operation of the vehicle; and a second prompt information is output; the second prompt information is used to indicate that the battery voltage is low; If the output voltage of the battery is within the third voltage range, the low-voltage load of the vehicle is powered by the battery, the driving speed of the vehicle is limited, and a third prompt message is output; the third prompt message is used to indicate that the power system of the vehicle is abnormal, and the vehicle is requested to stop safely; The voltage value in the first voltage range is greater than the voltage value in the second voltage range, and the voltage value in the second voltage range is greater than the voltage value in the third voltage range.

4. The method according to any one of claims 1 to 3, characterized in that: In the case where the abnormality type includes the second type, controlling the vehicle based at least on the vehicle state and the abnormality type comprises: monitoring an output voltage of a battery of the vehicle; If the output voltage belongs to a fourth voltage range, limiting a first target function of the vehicle based on the vehicle state; supplying power to the vehicle through the DC converter and the battery to control the vehicle; Wherein, in the second type, the output current of the DC converter is greater than the output current upper limit.

5. The method according to claim 4, characterized in that If the output voltage belongs to a fourth voltage range, limiting the first target function of the vehicle based on the vehicle state includes: If the time for which the output voltage belongs to the fourth voltage range is less than or equal to a second time period, limiting a first function of the vehicle based on the vehicle state; If the time during which the output voltage belongs to the fourth voltage range is greater than the second time period and less than the third time period, limiting the second function of the vehicle based on the vehicle state; The first function is different from the second function, and the third duration is greater than the second duration.

6. The method according to claim 5, characterized in that If the vehicle state is a driving state, the first function includes an AC discharge function; the second function includes: a low-voltage load control function of non-power control; If the vehicle state is a parking state, the first function includes a low-voltage load control function of non-power control; the second function includes: an AC discharge function.

7. The method according to claim 4, characterized in that The method further comprises: If the output voltage belongs to the second voltage range, the second target function of the vehicle is limited; the vehicle is powered by the DC converter and the battery, and a second prompt message is output; the second prompt message is used to indicate that the battery voltage is low; If the output voltage belongs to the third voltage range, the second target function of limiting the vehicle is performed; the vehicle is powered by the DC converter and the battery, the driving speed of the vehicle is limited, and a third prompt message is output; the third prompt message is used to indicate that the power system of the vehicle is abnormal and please stop safely; Among them, the voltage value of the third voltage range is smaller than the voltage value of the second voltage range; the voltage value of the second voltage range is smaller than the voltage value of the fourth voltage range.

8. A vehicle control device, characterized in that: The device comprises: An acquisition unit, used for acquiring an output current of a power distribution unit PDU of a vehicle; a determination unit, configured to determine a vehicle state and an abnormality type of the vehicle when the output current is abnormal; A control unit is used to control the vehicle based on at least the vehicle state and the abnormality type.

9. A vehicle, characterized in that: The vehicle comprises a processor and a memory, wherein a computer program or instructions are stored in the memory, and when the computer program or instructions are executed by the processor, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed by the processor, the method according to any one of claims 1 to 7 is implemented.

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