Low-voltage power mode management method, device, vehicle and storage medium

Abstract

The present invention provides a low-voltage power mode management method, device, vehicle, and storage medium, belonging to the field of vehicle positioning technology. The method comprises: obtaining the power mode of the entire vehicle power supply, where the power mode is any one of OFF mode, ON mode, READY mode, and RUNNING mode; obtaining the operating status of the DCDC system, and determining a low-voltage power mode management strategy based on the operating status of the DCDC system and the power mode. The low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp-home control management strategy. The present invention determines the low-voltage power mode management strategy based on the power mode and the operating status of the DCDC system, implementing power management in any power mode, preventing low-voltage battery depletion, ensuring normal power consumption of low-voltage electrical equipment when the next high-voltage power-up is applied, thereby ensuring normal vehicle startup and improving the driver's experience.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power control, and in particular to a low-voltage power mode management method, device, vehicle and storage medium. Background Art

[0002] With the development of intelligent electrification of vehicles, there are more and more electrical devices on vehicles, and the power consumption of low-voltage loads on vehicles is also increasing. If the electric energy is excessively consumed, it will lead to insufficient power of the low-voltage battery. If the low-voltage battery is insufficient, it will cause some controllers to be unable to obtain sufficient low-voltage power source when the vehicle is powered on at high voltage due to the low-voltage battery being low in power, which will eventually lead to failure of high-voltage power-on and affect the normal start-up of the vehicle.

[0003] Therefore, there is an urgent need to provide a low-voltage power mode management method, device, vehicle and storage medium to ensure the power consumption of low-voltage electrical equipment in various power modes of the vehicle, thereby ensuring the successful power-on of the vehicle's high voltage. Summary of the Invention

[0004] In view of this, it is necessary to provide a low-voltage power mode management method, device, vehicle and storage medium to solve the technical problem in the existing technology that it is impossible to ensure that the power of the low-voltage battery can meet the power consumption of the low-voltage electrical equipment when the high voltage is powered on, resulting in failure of high-voltage power-on and the inability to start the vehicle.

[0005] On the one hand, in order to solve the above technical problems, the present invention provides a low-voltage power mode management method, comprising:

[0006] Obtain the power mode of the vehicle power supply, which can be any one of OFF mode, ON mode, READY mode and RUNNING mode;

[0007] The operating status of the DCDC system is obtained, and a low-voltage power mode management strategy is determined based on the operating status of the DCDC system and the power mode, wherein the low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp home control management strategy.

[0008] In a possible implementation, if the operating state of the DCDC system is a normal state or a fault state, determining the low-voltage power mode management strategy based on the operating state of the DCDC system and the power mode includes:

[0009] When the power mode is OFF mode, the low voltage power mode management strategy is switched to the static current management strategy;

[0010] When the power mode is ON mode, the low voltage power mode management strategy is switched to the load classification management strategy;

[0011] When the power mode is READY mode or RUNNING mode, and the operating state of the DCDC system is normal, the low-voltage power mode management strategy is switched to the DCDC management strategy;

[0012] When the power mode is the RUNNING mode and the operating state of the DCDC system is a fault state, the low-voltage power mode management strategy is switched to the limp home control management strategy.

[0013] In a possible implementation, the static current management strategy is:

[0014] Obtaining a first state of charge value of the low-voltage battery when the power mode is OFF mode and a required state of charge value required for the next vehicle power-on;

[0015] determining a first ratio of the first state of charge value to the state of charge requirement, and determining whether the first ratio is greater than a first threshold;

[0016] If the value is greater than a first threshold, detecting the real-time state of charge of the low-voltage battery at first intervals;

[0017] If it is less than or equal to the first threshold, determining whether the first ratio is greater than a second threshold; the second threshold is less than the first threshold;

[0018] If it is greater than a second threshold, detecting the real-time state of charge value of the low-voltage battery every second time period; the second time period is less than the first time period;

[0019] If it is less than or equal to the second threshold, determining whether the DCDC condition is met;

[0020] If the condition is satisfied, the DCDC system is controlled to connect the high-voltage system to charge the low-voltage battery. When the power level of the low-voltage battery exceeds the first threshold, the high-voltage system is disconnected, the vehicle goes into hibernation, and the real-time state of charge of the low-voltage battery is detected every first period.

[0021] If not, a low-voltage battery power alarm message will be sent to the client.

[0022] In a possible implementation, the load classification management strategy is:

[0023] Obtaining a second state of charge value of the low-voltage battery when the power mode is ON mode and a state of charge requirement value required for the next vehicle power-on;

[0024] determining a second ratio of the second state of charge value to the state of charge requirement, and determining whether the second ratio is less than a first threshold;

[0025] If the battery level is less than the first threshold, a low battery reminder message is sent to the client;

[0026] If no feedback is received from the client, cutting off part of the load based on the second ratio and a preset load cutoff mapping relationship;

[0027] If feedback from the client is received, the DC / DC converter is turned on to charge the low-voltage battery until the real-time state of charge of the low-voltage battery is greater than the first threshold, and the partial load is turned on.

[0028] In a possible implementation, the DCDC management strategy is:

[0029] Obtaining a third state of charge of the low-voltage battery when the power mode is the READY mode and a state of charge requirement value required for the next vehicle power-on;

[0030] determining a third ratio of the third state of charge value to the state of charge requirement, and determining whether the third ratio is greater than a first threshold;

[0031] When the voltage is greater than the first threshold, the DCDC system does not output, and the low-voltage battery is used to supply power to the low-voltage electrical equipment;

[0032] When the voltage is less than or equal to a second threshold, the DCDC system is used to supply power to the low-voltage battery and the low-voltage electrical equipment at the same time; and the second threshold is less than the first threshold.

[0033] In a possible implementation, the DCDC management strategy is:

[0034] Obtaining a fourth state of charge of the low-voltage battery and a required state of charge value required for the next vehicle power-on when the power mode is the RUNNING mode and the low-voltage battery and the DCDC system are simultaneously supplying power to the low-voltage electrical equipment at full power;

[0035] determining a fourth ratio of the fourth state of charge value to the state of charge requirement, and determining whether the fourth ratio is greater than a second threshold and less than a first threshold;

[0036] If the fourth ratio is greater than the second threshold and less than the first threshold, switch to the load classification management strategy.

[0037] In a possible implementation, the limp control management strategy is:

[0038] When the operating state of the DCDC system is a fault state, determining whether the level of the fault state is a high level;

[0039] If so, cut off the output of the DCDC system and cut off all low-voltage electrical equipment that is not related to driving and safety.

[0040] On the other hand, the present invention also provides a low-voltage power mode management device, comprising:

[0041] A power mode acquisition unit, used to acquire the power mode of the vehicle power supply, wherein the power mode is any one of OFF mode, ON mode, READY mode and RUNNING mode;

[0042] A management strategy determination unit is used to obtain the operating status of the DCDC system and determine a low-voltage power mode management strategy based on the operating status of the DCDC system and the power mode, wherein the low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp home control management strategy.

[0043] In another aspect, the present invention further provides a vehicle, comprising a memory and a processor, wherein:

[0044] The memory is used to store programs;

[0045] The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the low-voltage power mode management method described in any one of the possible implementations above.

[0046] On the other hand, the present invention also provides a computer-readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps in the low-voltage power mode management method described in any one of the above possible implementation methods are implemented.

[0047] The beneficial effects of the present invention are as follows: the low-voltage power mode management method provided by the present invention first obtains the power mode of the entire vehicle power supply, and then determines the low-voltage power mode management strategy based on the power mode and the operating status of the DCDC system, thereby realizing power management in any power mode, avoiding low-voltage power supply, that is, low-voltage battery power loss, ensuring normal power consumption of low-voltage electrical equipment when the high voltage is powered on next time, thereby ensuring normal vehicle startup and improving the driver's experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 A schematic flow chart of an embodiment of the low-voltage power supply mode management method provided by the present invention;

[0050] Figure 2 A schematic diagram of an embodiment of the low-voltage power mode management strategy switching / jumping strategy provided by the present invention;

[0051] Figure 3 A schematic diagram of an embodiment of the static current management strategy provided by the present invention;

[0052] Figure 4 A schematic diagram of an embodiment of the load classification management strategy provided by the present invention;

[0053] Figure 5 A schematic diagram of an embodiment of the DCDC management strategy provided by the present invention;

[0054] Figure 6 A schematic structural diagram of an embodiment of a low-voltage power supply mode management device provided by the present invention;

[0055] Figure 7 This is a schematic structural diagram of an embodiment of a vehicle provided by the present invention. DETAILED DESCRIPTION

[0056] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0057] It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in the present invention illustrate operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps that have no logical contextual relationship can be reversed in order or implemented simultaneously. In addition, those skilled in the art, guided by the content of the present invention, can add one or more other operations to the flowcharts or remove one or more operations from the flowcharts. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0058] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] The present invention provides a low-voltage power mode management method, device, vehicle and storage medium, which are described below respectively.

[0060] Before presenting specific embodiments, the basic structure of the vehicle is first introduced. Specifically, the vehicle includes low-voltage electrical equipment, a low-voltage battery, a high-voltage system and a DCDC system. The low-voltage battery is used to power the low-voltage electrical equipment. One end of the DCDC system is connected to the high-voltage system, and the other end is connected between the low-voltage electrical equipment and the low-voltage battery. When the low-voltage battery is low on power, the high-voltage system performs voltage conversion through the DCDC system to power the low-voltage electrical equipment and charge the low-voltage battery.

[0061] Figure 1 A flow chart of an embodiment of the low voltage power mode management method provided by the present invention is shown as follows: Figure 1 As shown, the low voltage power mode management method includes:

[0062] S101, obtaining the power mode of the vehicle power supply, which can be any one of OFF mode, ON mode, READY mode and RUNNING mode;

[0063] S102: Obtain the operating status of the DCDC system, and determine a low-voltage power mode management strategy based on the operating status of the DCDC system and the power mode. The low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp-home control management strategy.

[0064] Among them, the OFF mode in step S101 is the mode when the power switch is in the OFF position, the ON mode is the mode when the ignition switch is in the ON position but the high voltage is not powered on, the READY mode is the mode when the ignition switch is in the ON position and the high voltage is powered on, and the RUNNING state is the mode when the vehicle is running.

[0065] The operating state of the DCDC system can be determined based on the diagnostic instrument. Specifically, the operating state of the DCDC system is a normal state or a fault state.

[0066] Compared with the prior art, the low-voltage power mode management method provided in the embodiment of the present invention first obtains the power mode of the vehicle power supply, and then determines the low-voltage power mode management strategy based on the power mode and the operating status of the DCDC system, thereby realizing power management in any power mode, avoiding low-voltage power supply, i.e., low-voltage battery power loss, and ensuring normal power consumption of low-voltage electrical equipment when the high voltage is powered on next time, thereby ensuring normal vehicle startup and improving the driver's experience.

[0067] In some embodiments of the present invention, the low voltage power mode management strategy is determined based on the operating state and power mode of the DCDC system in step S102, specifically:

[0068] When the power mode is OFF, the low voltage power mode management strategy switches to the static current management strategy;

[0069] When the power mode is ON, the low-voltage power mode management strategy switches to the load classification management strategy;

[0070] When the power mode is READY mode or RUNNING mode, and the operating status of the DCDC system is normal, the low-voltage power mode management strategy is switched to the DCDC management strategy;

[0071] When the power mode is RUNNING mode and the operating state of the DCDC system is a fault state, the low voltage power mode management strategy is switched to the limp home control management strategy.

[0072] Specifically, the switching / jumping strategies between different low voltage power mode management strategies are as follows: Figure 2As shown, if the current low-voltage power mode management strategy is the quiescent current management strategy or the DCDC management strategy, and the power mode is switched to the ON mode, the low-voltage power mode management strategy is switched to the load classification management strategy; if the current low-voltage power mode management strategy is the DCDC management strategy, the load classification management strategy or the limp home control strategy, and the power mode is switched to the OFF mode, the low-voltage power mode management strategy is switched to the quiescent current management strategy; if the current low-voltage power mode management strategy is the quiescent current management strategy, the load classification management strategy or the limp home control strategy, and the power mode is switched to the READY mode or the RUNNING mode, and the DCDC has no fault, the low-voltage power mode management strategy is switched to the DCDC management strategy; if the current low-voltage power mode management strategy is the quiescent current management strategy or the DCDC management strategy, and the operating state of the DCDC system is a fault state, the strategy is switched to the limp home control strategy.

[0073] In a specific embodiment of the present invention, Figure 3 As shown, the static current management strategy is:

[0074] Obtain the first state of charge (SOC) value of the low-voltage battery when the power mode is OFF and the required SOC value required for the next vehicle power-on;

[0075] determining a first ratio of the first state of charge value to the state of charge requirement, and determining whether the first ratio is greater than a first threshold;

[0076] If it is greater than the first threshold, detecting the real-time state of charge value of the low-voltage battery every first time period;

[0077] If it is less than or equal to the first threshold, determining whether the first ratio is greater than a second threshold; the second threshold is less than the first threshold;

[0078] If it is greater than the second threshold, the real-time state of charge value of the low-voltage battery is detected every second time period; the second time period is less than the first time period;

[0079] If it is less than or equal to the second threshold, determining whether the DCDC condition is met;

[0080] If the condition is satisfied, the DCDC system is controlled to connect the high-voltage system to charge the low-voltage battery. When the power level of the low-voltage battery is greater than a first threshold, the high-voltage system is disconnected, the vehicle goes into hibernation, and the real-time state of charge of the low-voltage battery is detected at a first interval.

[0081] If not, a low-voltage battery power alarm message will be sent to the client.

[0082] The embodiment of the present invention sets different wake-up detection strategies based on the different first ratios, which can ensure that the first state of charge value meets the requirements for the next vehicle power-on and ensure that the next vehicle power-on is successful.

[0083] In a specific embodiment of the present invention, the first threshold is 2, the second threshold is 1, the first duration is 3 days, and the second duration is 1 day.

[0084] Among them, the DCDC condition refers to whether the current high-voltage battery power status and the high-voltage safety status of other equipment meet the requirements.

[0085] It should be noted that: after the client receives the low-voltage battery power alarm prompt information, it can generate a DCDC connection request, and based on the DCDC connection request, control the high-voltage system to charge the low-voltage battery through the DCDC system until the ratio of the low-voltage battery power to the charge state requirement value is greater than the first threshold.

[0086] In a specific embodiment of the present invention, Figure 4 As shown in the figure, the load classification management strategy is:

[0087] Obtaining a second state of charge value of the low-voltage battery when the power mode is ON and a required state of charge value required for the next vehicle power-on;

[0088] determining a second ratio of the second state of charge value to the state of charge requirement, and determining whether the second ratio is less than a first threshold;

[0089] If the battery level is less than the first threshold, a low battery reminder message is sent to the client;

[0090] If no feedback is received from the client, cutting off part of the load based on the second ratio and the preset load cutoff mapping relationship;

[0091] If feedback is received from the client, the DCDC is turned on to charge the low-voltage battery until the real-time state of charge value of the low-voltage battery is greater than the first threshold, and part of the load is turned on.

[0092] The mapping relationship between the second ratio and the preset load shutdown is shown in Table 1:

[0093] Table 1 Mapping relationship between the second ratio and load shutdown

[0094]

[0095] Table 1 shows that low-voltage loads are divided into multiple load functions with a disablement level of I and multiple load functions with a disablement level of II. When the second ratio is greater than 1 and less than 2, multimedia, seat massage, heating, and berth heating are disabled. When the second ratio is less than or equal to 1, multimedia, seat massage, heating, berth heating, warm air, and air conditioning are disabled.

[0096] The embodiment of the present invention can more effectively utilize the energy of the low-voltage battery by cutting off different loads until all disabling functions are disabled.

[0097] It should be noted that the load shutdown is controlled by the message sent through the CAN network.

[0098] The low battery reminder information may be in the form of sound and / or text.

[0099] In a specific embodiment of the present invention, Figure 5 As shown, the DCDC management strategy is:

[0100] Obtain the third state of charge of the low-voltage battery when the power mode is READY mode and the state of charge requirement value required for the next vehicle power-on;

[0101] determining a third ratio of the third state of charge value to the state of charge requirement, and determining whether the third ratio is greater than a first threshold;

[0102] When the voltage is greater than the first threshold, the DCDC system does not output power, and the low-voltage battery is used to supply power to the low-voltage electrical equipment;

[0103] When it is less than or equal to a second threshold, the DCDC system is used to supply power to the low-voltage battery and the low-voltage electrical equipment at the same time; the second threshold is less than the first threshold.

[0104] In the embodiment of the present invention, when the third ratio is less than or equal to the second threshold value, the DCDC system is used to power the low-voltage battery and the low-voltage electrical equipment at the same time. Under the premise of ensuring the normal use of the low-voltage electrical equipment, the power of the low-voltage battery can be increased, thereby ensuring that the vehicle is successfully powered on next time.

[0105] To prevent excessive power consumption of low-voltage electrical equipment, in a specific embodiment of the present invention, the DCDC management strategy is further as follows:

[0106] Obtain the fourth state of charge of the low-voltage battery and the state of charge requirement value required for the next vehicle power-on when the power mode is RUNNING mode and the low-voltage battery and DCDC system are simultaneously supplying power to low-voltage electrical equipment at full power;

[0107] determining a fourth ratio of the fourth state of charge value to the state of charge requirement, and determining whether the fourth ratio is greater than the second threshold and less than the first threshold;

[0108] If the fourth ratio is greater than the second threshold and less than the first threshold, the load classification management strategy is switched to.

[0109] In the embodiment of the present invention, when the low-voltage battery and the DCDC system are simultaneously supplying power to the low-voltage electrical equipment at full power, the fourth ratio is less than the first threshold value, and the load classification management strategy is started, which can shut down unnecessary low-voltage electrical equipment and improve the effective utilization of the low-voltage battery energy.

[0110] In other words, if Figure 2 As shown, the DCDC management strategy and the load classification management strategy also include a switching process, namely: when the DCDC system supplies power to low-voltage electrical equipment at full power at the same time, the fourth ratio is less than the first threshold, and the low-voltage power mode management strategy is switched from the DCDC management strategy to the load classification management strategy.

[0111] In a specific embodiment of the present invention, the lameness control management strategy is:

[0112] When the operating state of the DCDC system is a fault state, it is determined whether the level of the fault state is a high level; if so, the output of the DCDC system is cut off, and all low-voltage electrical equipment not related to driving and safety is cut off.

[0113] The fault status level can be divided based on the fault type, such as overvoltage, undervoltage, no output, etc.

[0114] Specifically, when the fault state is no output, the level of the fault state is a high level.

[0115] When the fault status level is not a high level, it can be executed based on the pre-set control measures without cutting off the output of the DCDC system, ensuring the normal operation of low-voltage electrical equipment to a certain extent.

[0116] In order to better implement the low-voltage power mode management method in the embodiment of the present invention, based on the low-voltage power mode management method, the embodiment of the present invention also provides a low-voltage power mode management device, the vehicle includes a transmission controller and a vehicle controller, such as Figure 6 As shown, the low voltage power mode management device 600 includes:

[0117] The power mode acquisition unit 601 is used to acquire the power mode of the vehicle power supply, where the power mode is any one of the OFF mode, ON mode, READY mode and RUNNING mode;

[0118] The management strategy determination unit 602 is used to obtain the operating status of the DCDC system and determine the low-voltage power mode management strategy based on the operating status of the DCDC system and the power mode. The low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp home control management strategy.

[0119] It should be noted that the low-voltage power mode management device 600 provided in the above embodiment can implement the technical solution described in the above low-voltage power mode management method embodiment. The specific implementation principles or specific implementation details of the above modules or units can be found in the corresponding contents in the above low-voltage power mode management method embodiment, and will not be described one by one here.

[0120] like Figure 7 As shown, the present invention also provides a vehicle 700. The vehicle 700 includes a processor 701, a memory 702 and a display 703. Figure 7 Only some of the components of vehicle 700 are shown, but it should be understood that implementing all of the shown components is not a requirement, and more or fewer components may alternatively be implemented.

[0121] In some embodiments, the processor 701 may be a central processing unit (CPU), a microprocessor, or other data processing chip, configured to execute program codes or process data stored in the memory 702, such as the low-voltage power mode management method of the present invention.

[0122] In some embodiments of the present invention, processor 701 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, processor 701 may be local or remote. In some embodiments, processor 701 may be implemented on a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, multiple clouds, or any combination thereof.

[0123] In some embodiments, the memory 702 may be an internal storage unit of the vehicle 700 , such as a hard drive or memory of the vehicle 700 .

[0124] Furthermore, the memory 702 may include both an internal storage unit of the vehicle 700 and an external storage device. The memory 702 is used to store application software installed in the vehicle 700 and various data.

[0125] In some embodiments, display 703 can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 703 is used to display information about vehicle 700 and to present a visual user interface. Components 701-703 of vehicle 700 communicate with each other via a system bus.

[0126] In some embodiments of the present invention, when the processor 701 executes the low voltage power mode management program in the memory 702, the following steps may be implemented:

[0127] Get the vehicle power mode, which can be any of OFF, ON, READY, and RUNNING modes.

[0128] The operating status of the DCDC system is obtained, and a low-voltage power mode management strategy is determined based on the operating status of the DCDC system and the power mode. The low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp-home control management strategy.

[0129] It should be understood that, when the processor 701 executes the low voltage power mode management program in the memory 702 , in addition to the above functions, it can also implement other functions. For details, please refer to the description of the corresponding method embodiment above.

[0130] The vehicle 700 in the embodiment of the present invention may be any one of a fuel vehicle, an electric vehicle or a hybrid vehicle.

[0131] Accordingly, an embodiment of the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, it can implement the steps or functions in the low-voltage power mode management method provided in the above-mentioned method embodiments.

[0132] Those skilled in the art will appreciate that all or part of the process flow of the above-described method embodiment can be implemented by instructing related hardware (such as a processor, controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0133] The above is a detailed introduction to a low-voltage power mode management method, device, vehicle and storage medium provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A low voltage power supply mode management method, characterized in that: include: Obtain the power mode of the vehicle power supply, which can be any one of OFF mode, ON mode, READY mode and RUNNING mode; Obtaining an operating state of a DCDC system, and determining a low-voltage power mode management strategy based on the operating state of the DCDC system and the power mode, wherein the low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp-home control management strategy; The DCDC management strategy is: Obtaining a third state of charge value of the low-voltage battery when the power mode is the READY mode and a state of charge requirement value required for the next vehicle power-on; determining a third ratio of the third state of charge value to the state of charge requirement, and determining whether the third ratio is greater than a first threshold; When the voltage is greater than the first threshold, the DCDC system does not output, and the low-voltage battery is used to supply power to the low-voltage electrical equipment; When the voltage is less than or equal to a second threshold, the DCDC system is used to supply power to the low-voltage battery and the low-voltage electrical equipment at the same time; the second threshold is less than the first threshold; The DCDC management strategy is: Obtaining a fourth state of charge value of the low-voltage battery and a required state of charge value required for the next vehicle power-on when the power mode is the RUNNING mode and the low-voltage battery and the DCDC system are simultaneously supplying power to the low-voltage electrical equipment at full power; determining a fourth ratio of the fourth state of charge value to the state of charge requirement, and determining whether the fourth ratio is greater than a second threshold and less than a first threshold; If the fourth ratio is greater than the second threshold and less than the first threshold, switch to the load classification management strategy.

2. The low voltage power mode management method according to claim 1, characterized in that: If the operating state of the DCDC system is a normal state or a fault state, then determining the low-voltage power mode management strategy based on the operating state of the DCDC system and the power mode includes: When the power mode is OFF mode, the low voltage power mode management strategy is switched to the static current management strategy; When the power mode is ON mode, the low voltage power mode management strategy is switched to the load classification management strategy; When the power mode is READY mode or RUNNING mode, and the operating state of the DCDC system is normal, the low-voltage power mode management strategy is switched to the DCDC management strategy; When the power mode is the RUNNING mode and the operating state of the DCDC system is a fault state, the low-voltage power mode management strategy is switched to the limp home control management strategy.

3. The low voltage power mode management method according to claim 1, characterized in that: The static current management strategy is: Obtaining a first state of charge value of the low-voltage battery when the power mode is OFF mode and a required state of charge value required for the next vehicle power-on; determining a first ratio of the first state of charge value to the state of charge requirement, and determining whether the first ratio is greater than a first threshold; If the value is greater than a first threshold, detecting the real-time state of charge of the low-voltage battery at first intervals; If it is less than or equal to the first threshold, determining whether the first ratio is greater than a second threshold; The second threshold is less than the first threshold; If it is greater than a second threshold, detecting the real-time state of charge value of the low-voltage battery every second time period; the second time period is less than the first time period; If it is less than or equal to the second threshold, determining whether the DCDC condition is met; If the condition is satisfied, the DCDC system is controlled to connect the high-voltage system to charge the low-voltage battery. When the power level of the low-voltage battery exceeds the first threshold, the high-voltage system is disconnected, the vehicle goes into hibernation, and the real-time state of charge of the low-voltage battery is detected every first period. If not, a low-voltage battery power alarm message will be sent to the client.

4. The low voltage power mode management method according to claim 1, characterized in that: The load classification management strategy is: Obtaining a second state of charge value of the low-voltage battery when the power mode is the ON mode and a state of charge requirement value required for the next vehicle power-on; determining a second ratio of the second state of charge value to the state of charge requirement, and determining whether the second ratio is less than a first threshold; If the battery level is less than the first threshold, a low battery reminder message is sent to the client; If no feedback is received from the client, cutting off part of the load based on the second ratio and a preset load cutoff mapping relationship; If feedback from the client is received, the DC / DC converter is turned on to charge the low-voltage battery until the real-time state of charge of the low-voltage battery is greater than the first threshold, and the partial load is turned on.

5. The low voltage power mode management method according to claim 2, characterized in that: The lameness control management strategy is: When the operating state of the DCDC system is a fault state, determining whether the level of the fault state is a high level; If so, cut off the output of the DCDC system and cut off all low-voltage electrical equipment that is not related to driving and safety.

6. A low voltage power mode management device, characterized in that: The low-voltage power mode management method according to any one of claims 1 to 5, wherein the device comprises: A power mode acquisition unit, used to acquire the power mode of the vehicle power supply, wherein the power mode is any one of OFF mode, ON mode, READY mode and RUNNING mode; A management strategy determination unit is used to obtain the operating status of the DCDC system and determine a low-voltage power mode management strategy based on the operating status of the DCDC system and the power mode, wherein the low-voltage power mode management strategy includes a quiescent current management strategy, a load classification management strategy, a DCDC management strategy, and a limp home control management strategy.

7. A vehicle, characterized in that: comprising a memory and a processor, wherein, The memory is used to store programs; The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the low-voltage power mode management method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the low-voltage power mode management method according to any one of claims 1 to 5 are implemented.

Images