A power supply control method, apparatus, power supply system, vehicle, and storage medium

Abstract

This application discloses a power supply control method, device, power supply system, vehicle, and storage medium. The method includes: acquiring a first real-time output power provided by a power supply system to a load unit and the real-time total power demand of the load unit in the current operating mode; when the first real-time output power and the real-time total power demand are unbalanced, determining a target power supply management strategy based on the current operating mode of the power supply system; wherein the target power supply management strategy includes a first strategy and a second strategy, the first strategy including a strategy for regulating the power supply system, and the second strategy including a strategy for regulating the power supply system and the load unit according to a preset sequence; regulating the power supply system according to the target power supply management strategy until the supply and demand of the load unit reach a balance. By reasonably limiting the load power or increasing the power supply capacity of the power supply system, efficient utilization of power supply resources is achieved.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a power supply control method, device, power supply system, vehicle, and storage medium. Background Technology

[0002] With the continuous development of new energy vehicle technology, the types and numbers of low-voltage loads configured on new energy vehicles are increasing, placing higher power output requirements on the power supply system. As an important component of vehicle energy management, the power supply system needs to dynamically adjust its power supply strategy according to different operating conditions to ensure the normal operation of each low-voltage load.

[0003] Currently, power supply systems with fixed power designs are typically used to meet the maximum power consumption requirements of the vehicle's low-voltage loads. This means that during the design phase, the power supply system is designed based on the maximum power consumption of all low-voltage loads operating simultaneously. However, in actual operation, low-voltage loads do not always operate at their maximum power consumption simultaneously. Therefore, this design philosophy leads to resource waste. Furthermore, to achieve higher power output from the power supply system, larger components are required, resulting in increased component costs and size, which is detrimental to optimizing the vehicle's space layout. Summary of the Invention

[0004] This application proposes a power supply control method, device, power supply system, vehicle, and storage medium, which achieves efficient utilization of power supply resources by reasonably limiting the load power or increasing the power supply capacity of the power supply system.

[0005] The technical solution of this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a power supply control method applied to a power supply system, the power supply system including a power supply system and a load unit. The method includes: acquiring a first real-time output power provided by the power supply system to the load unit in a current operating mode and the real-time total power demand of the load unit; when the first real-time output power and the real-time total power demand are unbalanced, determining a target power supply management strategy based on the current operating mode of the power supply system; wherein the target power supply management strategy includes a first strategy and a second strategy, the first strategy including a strategy for regulating the power supply system, and the second strategy including switching the current operating mode of the power supply system to a DC power supply mode, determining the output power of the power supply system in the DC power supply mode, and obtaining a second real-time output power; regulating the real-time total power demand of the load unit based on the second real-time output power; and regulating the power supply system according to the target power supply management strategy until the supply and demand of the load unit reach a balance.

[0007] Based on the aforementioned technical methods, the system first determines whether a supply-demand imbalance exists by acquiring the output power of the power supply system and the total power demand of the load, thereby triggering the corresponding control process. Furthermore, the control strategy is dynamically selected based on the operating mode of the power supply system, making the control process more targeted and adaptable. When using the first strategy, the power supply system is adjusted first to quickly respond to power changes, while when using the second strategy, load units are controlled sequentially according to the priority of load subsets, thus achieving more refined and hierarchical load management. This not only improves the response speed of the power supply system but also avoids functional interruptions caused by indiscriminate power outages, enhancing the safety and stability of the entire vehicle operation.

[0008] In some embodiments, determining a target power supply management strategy based on the current operating mode of the power supply system includes: acquiring the current operating mode of the power supply system; wherein the operating mode includes one of the following: charging mode, discharging mode, and DC power supply mode; if the current operating mode of the power supply system is charging mode and / or discharging mode, and the maximum output power of the power supply system is greater than or equal to the real-time total power demand, determining the target power supply management strategy as a first strategy; if the current operating mode of the power supply system is charging mode and / or discharging mode, and the maximum output power of the power supply system is less than the real-time total power demand, determining the target power supply management strategy as a second strategy; if the current operating mode of the power supply system is DC power supply mode, determining the target power supply management strategy as the second strategy.

[0009] Based on the aforementioned technical means, by identifying the current operating mode of the power supply system and comparing its maximum output power with the total power demand of the load, it is possible to accurately determine whether the power supply system or load unit needs to be adjusted. This operating mode-based judgment mechanism makes the adjustment logic more reasonable, avoids unnecessary resource waste and interference, and ensures that supply and demand balance can be maintained under different operating conditions, thereby improving overall power supply efficiency and system robustness.

[0010] In some embodiments, determining a target power supply management strategy based on the current operating mode of the power supply system includes: acquiring the current operating mode of the power supply system; if the current operating mode of the power supply system is charging mode and the maximum output power of the power supply system is greater than or equal to the real-time total power demand, acquiring the current state of charge (SOC) of the battery cells of the power supply system; determining whether the current SOC is greater than a preset SOC threshold; if the current SOC is greater than the preset SOC threshold, determining the target power supply management strategy as a first strategy; if the current SOC is less than or equal to the preset SOC threshold, determining the target power supply management strategy as a second strategy.

[0011] Based on the aforementioned technical methods, the State of Charge (SOC) of the battery cells is introduced as the basis for selecting the control strategy. This allows for a comprehensive consideration of the relationship between the battery's state of charge and load demand when the power supply system is in charging mode, thereby determining whether to prioritize adjusting the power supply side or the load side. This approach effectively prevents high-energy-consuming loads from being executed when the battery charge is low, helping to extend battery life and ensure the reliability of the entire vehicle operation.

[0012] In some embodiments, the target power supply strategy is a first strategy, which regulates the power supply system according to the target power supply management strategy, including: switching the current working mode of the power supply system to DC power supply mode.

[0013] Based on the aforementioned technical means, under the first strategy, by switching to DC power supply mode, the output capacity of the power supply system can be maximized, the energy loss caused by mode conversion can be reduced, and the response speed and stability of the power supply system can be improved, thereby restoring the supply and demand balance more quickly.

[0014] In some embodiments, regulating the real-time total power demand of the load unit based on the second real-time output power includes: determining the difference between the real-time total power demand of the load unit and the second real-time output power; and regulating the real-time total power demand of the load unit based on the difference.

[0015] Based on the aforementioned technical means, under the second strategy, by switching to DC power supply mode, optimizing the output configuration on the power supply side, and further implementing tiered load control based on the supply-demand difference, precise control of power distribution is achieved. This method can gradually limit non-critical loads while ensuring basic functions, thereby effectively alleviating pressure on the power supply side and improving the flexibility and controllability of the overall power supply system.

[0016] In some embodiments, the load unit includes a first load subset, a second load subset, a third load subset, and a fourth load subset arranged in priority order, wherein the first load subset includes touch switch type electronically controlled loads, the second load subset includes gear or load adjustable type electronically controlled loads, the third load subset includes mechanically controlled loads, and the fourth load subset includes driving safety type loads; the real-time total power demand of the load unit is regulated according to the difference, including: when the difference is less than or equal to the real-time total power demand of the first load subset, traversing and controlling the loads in the first load subset that are in operation to shut down, until the supply and demand of the load unit are balanced.

[0017] Based on the aforementioned technical methods, by setting the priority order of load subsets and prioritizing the shutdown of lower-priority touch switch-type loads when the difference is small, load demand can be rapidly reduced with minimal impact on the overall vehicle operation, thereby restoring supply and demand balance. This on-demand, tiered control method ensures the continuous operation of core functions while avoiding user dissatisfaction or operational inconvenience caused by excessive intervention.

[0018] In some embodiments, adjusting the real-time total power demand of the load unit based on the difference includes: when the difference is greater than the real-time total power demand of the first load subset and less than or equal to the sum of the real-time total power demand of the first load subset and the second load subset, traversing and controlling the shutdown of the loads in the first load subset that are in operation, and traversing and adjusting the duty cycle or level of the loads in the second load subset that are in operation, until the supply and demand of the load unit are balanced.

[0019] Based on the aforementioned technical means, when the difference exceeds the control range of the first load subset, the duty cycle or level adjustment of the second type of adjustable load is introduced to further reduce load power consumption. This approach achieves precise control over power consumption without affecting critical functions, improves energy utilization, and enhances the system's adaptability to complex operating conditions.

[0020] In some embodiments, adjusting the real-time total power demand of the load units based on the difference includes: when the difference is greater than the sum of the real-time total power demand of the first load subset and the second load subset, and less than or equal to the sum of the real-time total power demand of the first load subset, the second load subset, and the third load subset, traversing and controlling the shutdown of the loads in the first load subset that are in operation, traversing and adjusting the duty cycle or level of the loads in the second load subset that are in operation, and controlling the relays in the third load subset to disconnect, until the supply and demand of the load units reach a balance.

[0021] Based on the aforementioned technical methods, when the difference further increases, the relay disconnection operation of the third type of load is introduced to further reduce the total power consumption of the load. This approach, while ensuring safety and basic functions, releases as much power as possible, thereby more effectively alleviating the pressure on the power supply side and improving the stability and reliability of the entire power supply system.

[0022] In some embodiments, adjusting the real-time total power demand of the load units based on the difference includes: determining that the vehicle is in an abnormal operating state when the difference is greater than the sum of the real-time total power demand of the first load subset, the second load subset, and the third load subset.

[0023] Based on the aforementioned technical methods, when the difference exceeds the total power consumption of all adjustable loads, it indicates that the current power supply system can no longer meet the load demand and may enter an abnormal operating state. In this case, timely prompting of the user to conduct an inspection or take emergency measures helps avoid potential safety risks and improves the safety and controllability of the entire vehicle operation.

[0024] Secondly, embodiments of this application provide a power supply control device applied to a vehicle power supply system. The power supply system includes a power replenishment system and a load unit. The device includes: an acquisition module, used to acquire a first real-time output power provided by the power replenishment system to the load unit in the current operating mode and the real-time total power demand of the load unit; a strategy determination module, used to determine a target power supply management strategy based on the current operating mode of the power replenishment system when the first real-time output power and the real-time total power demand are unbalanced; wherein the target power supply management strategy includes a first strategy and a second strategy, the first strategy including a strategy for regulating the power replenishment system, and the second strategy including switching the current operating mode of the power replenishment system to a DC power supply mode, determining the output power of the power replenishment system in the DC power supply mode, and obtaining a second real-time output power; regulating the real-time total power demand of the load unit based on the second real-time output power; and a regulation module, used to regulate the power supply system according to the target power supply management strategy until the supply and demand of the load unit reach a balance.

[0025] Thirdly, embodiments of this application provide a power supply system, including a power supply system, a load unit, and a vehicle controller. The vehicle controller is connected to the power supply system and the load unit, respectively. The power supply system is used to supply power to the load unit. The vehicle controller is used to execute the method as described in any one of the first aspects above to regulate the power supply system, or to regulate the power supply system and the load unit, until the supply and demand of the load unit reach a balance.

[0026] Fourthly, embodiments of this application provide a vehicle including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the method as described in any one of the first aspects above.

[0027] Fifthly, embodiments of this application provide a computer storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of the first aspects above.

[0028] It should be understood that the above general description and the following detailed description are illustrative and explanatory only, and are not intended to limit the technical solutions of this application. Attached Figure Description

[0029] Figure 1 This is an exemplary structural diagram of a power supply system provided in an embodiment of this application;

[0030] Figure 2 This is an exemplary structural diagram of a load unit provided in an embodiment of this application;

[0031] Figure 3 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 1 ;

[0032] Figure 4 This is a flowchart illustrating a method for determining a target power supply management strategy provided in an embodiment of this application;

[0033] Figure 5 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 2 ;

[0034] Figure 6 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 3 ;

[0035] Figure 7 This is a flowchart illustrating a power management method provided in an embodiment of this application. Figure 4 ;

[0036] Figure 8 This is a schematic diagram of the logical architecture of a vehicle controller provided in an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure of a power supply management device provided in an embodiment of this application. Figure 1 ;

[0038] Figure 10 This is a schematic diagram of the structure of a power supply management device provided in an embodiment of this application. Figure 2 ;

[0039] Figure 11 This is a schematic diagram of the hardware structure of a vehicle provided in an embodiment of this application. Detailed Implementation

[0040] In order to gain a more detailed understanding of the features and technical content of the embodiments of this application, the implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0042] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is 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.

[0043] It should also be noted that the terms "first, second, and third" used in the embodiments of this application are only used to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, and third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0044] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] With the continuous development of new energy vehicle technology, the types and numbers of low-voltage loads configured on new energy vehicles are increasing, placing higher power output requirements on the power supply system. As an important component of vehicle energy management, the power supply system needs to dynamically adjust its power supply strategy according to different operating conditions to ensure the normal operation of each low-voltage load.

[0046] In existing technologies, power supply systems with fixed power designs are typically used to meet the maximum power consumption requirements of the vehicle's low-voltage loads. That is, during the design phase, the power parameters of the power supply system are configured according to the maximum power consumption of all low-voltage loads operating simultaneously. While this method ensures power supply stability, it does not consider the actual power variation characteristics of low-voltage loads during operation. For example, low-voltage loads do not always operate at maximum power consumption simultaneously. Therefore, power supply systems designed using this approach suffer from excessive redundancy, leading to resource waste.

[0047] In addition, in order to achieve higher power output of the power supply system, larger-sized components are required, which will increase the cost and size of the components and is not conducive to the optimization of the overall vehicle space layout.

[0048] To address this technical problem, this application provides a power supply control method. First, it acquires the operating parameters of the power supply system and, based on these parameters, determines whether the first real-time output power provided by the power supply system to the load unit meets the load unit's real-time total power demand. If the real-time total power demand exceeds the first real-time output power, a target power supply management strategy is executed. This allows for timely adjustments to the power supply strategy based on the actual capacity of the power supply system, avoiding overload risks. Furthermore, it enables the reasonable limitation or enhancement of the power supply capacity to the load unit's real-time total power demand. This solution reduces hardware design redundancy, decreases product size and cost, and simultaneously improves the stability and adaptability of the power supply system through efficient utilization of power resources.

[0049] The power supply control method provided in this application acquires the operating parameters of the power supply system in real time and dynamically adjusts the power supply management strategy according to the supply / demand relationship. This enables intelligent limitation of the power demand of the load unit or enhancement of the output power of the power supply system, thereby optimizing power supply efficiency, reducing hardware specification requirements, and extending product lifespan. It solves the problems of low power supply efficiency, high hardware cost, and limited layout space caused by the mismatch between the power demand of low-voltage loads and the power supply capacity of the power supply system in the prior art.

[0050] The power supply control method, device, and vehicle provided in this application, while adapting to the development pace and application maturity of DC-OBC (Distributed Electric Vehicle-On-Board) power supply systems, rationally plan the low-voltage load power distribution control strategy for the entire vehicle. This maximizes the real-time, dynamic, adaptive, and intelligent adjustment of low-voltage load power distribution using mature industry technologies and performance applications of DC-OBC systems. It achieves power supply / demand balance for the low-voltage power supply system across all time domains and scenarios, effectively avoiding serious malfunctions caused by battery depletion due to low-voltage power supply system overload, which could render the vehicle unusable. This not only maximizes the expansion of product compatibility and extends product lifespan but also effectively controls product cost and size, thereby meeting the power requirements of the vehicle's low-voltage power supply system, significantly reducing overall vehicle development costs, and saving vehicle layout space.

[0051] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0052] Please refer to Figure 1 , Figure 1This is an exemplary structural diagram of a power supply system provided in an embodiment of this application. The power supply system refers to the electrical system in a vehicle that provides DC power to the load units. In this embodiment, the power supply system 10 includes, but is not limited to, a power battery 13, a power replenishment system 12, a storage battery 15, a load unit 16, and a vehicle control unit (VCU) 14.

[0053] The power supply system, namely the DC-AC / DC converter (DC-OBC), is a core component of the power supply system. It is responsible for charging and discharging the battery and converting the high-voltage DC input from the power battery 13 into a low-voltage DC output for use by the load unit 16 or the storage battery 15. The power supply system 12 has various circuit modules, such as... Figure 1 As shown, the power supply system 12 includes a charging module (AC / DC) 1201, a discharging module (DC / AC) 1203 and a DC power supply module (DC / DC) 1202.

[0054] The power supply system 12 operates in different modes corresponding to different circuit modules depending on the different usage scenarios of the vehicle. For example, in a charging scenario, the power supply system 12 operates in charging mode based on AC / DC1201. In scenarios such as discharging inside or outside the vehicle, the power supply system 12 operates in discharging mode based on DC / AC1203. In a driving scenario, the power supply system operates in DC power supply mode based on DC / DC1202.

[0055] It should be noted that when the power supply system 12 is in AC / DC1201 and DC / AC1203 operating modes, the DC / DC1202 operating mode is also running simultaneously.

[0056] In this embodiment, the power supply system 12 is connected to the charging facility 11, the power battery 13, the storage battery 15, the load unit 16, the external electrical appliance 17, and the vehicle controller VCU 14 via high-voltage wiring harnesses (including charging guns / discharge connectors, etc.) and low-voltage wiring harnesses. Through CAN network communication with the VCU 14, it enables functions such as charging the power battery 13, providing simultaneous external / in-vehicle / in-vehicle / external discharge to the external electrical appliance 17, and providing low-voltage power to the storage battery 15 and the load unit 16. The power supply system 12 can receive and respond to the operating commands of the VCU 14, outputting low-voltage power according to the commands to replenish the storage battery 15 and provide low-voltage power to the load unit 16.

[0057] It should be noted that, due to the different hardware electrical topology schemes adopted by the power supply system 12 (such as the magnetic integration topology scheme with a shared transformer and the board integration topology scheme with an independent transformer, etc.), the DC power supply capability of the power supply system 12 may be limited when the power supply system 12 is in AC / DC1201 or DC / AC1203 operating mode in order to achieve the best charging or discharging performance.

[0058] For example, when the power supply system 12 adopts a magnetically integrated topology with a shared transformer, the output power (DC output power) of the DC / DC1202 will be affected and reduced during charging or discharging modes. However, when the power supply system 12 is in DC power supply mode, the output power of the DC / DC1202 can reach its maximum output power.

[0059] Please refer to Figure 2 , Figure 2 This is an exemplary structural diagram of a load unit provided in an embodiment of this application. The load unit refers to all low-voltage electrical equipment in a vehicle powered by the power supply system. The load unit 16 includes multiple low-voltage loads. In this embodiment, based on the control method and importance of each low-voltage load, the load unit 16 can be divided into multiple load subsets, such as a first load subset 1601, a second load subset 1602, a third load subset 1603, and a fourth load subset 1604. The low-voltage loads included in the first load subset 1601 are, for example, touch switch type loads. The low-voltage loads included in the second load subset 1602 are, for example, gear-adjustable or load-adjustable type loads. The low-voltage loads included in the third load subset 1603 are, for example, mechanically controlled type loads, such as… Figure 2 As shown, the third load subset is connected to relay S1. The fourth load subset 1604 includes low-voltage loads such as driving safety loads. It should be noted that, in summary of the embodiments of this application, the power demand of the low-voltage loads included in the fourth load subset 1604 is prohibited from being reduced.

[0060] It should be noted that the division and classification of the load units 16 mentioned above are determined by a comprehensive review based on the actual load type and quantity configured in the vehicle, and the specific electrical circuit design is as follows: the embodiment in this application is only one possible implementation method, and not the only implementation method of this solution. Figure 2 The division method shown does not constitute a limitation on the electrical division type and the number of load subsets in this scheme.

[0061] like Figure 2As shown, a voltage sensor is connected in parallel on the battery 15 side to monitor the real-time voltage V0 of the load unit 16. At the same time, the real-time currents I0, I1, I2, I3, and I4 of the battery 15, the first load subset 1601, the second load subset 1602, the third load subset 1603, and the fourth load subset 1604 are monitored by the first current sensor, the second current sensor, the third current sensor, the fourth current sensor, and the fifth current sensor connected in series in each branch.

[0062] In this embodiment, the processing steps of the power supply control method can be implemented by a processor inside the vehicle, or by a processor of an on-board device installed on the vehicle. The on-board device is, for example, a vehicle controller.

[0063] It should be noted that the power supply system provided in this application embodiment can be not only a vehicle power supply system, but also a power supply system for other facilities, such as a power supply system for a digital computer room, or a power supply system for a server cluster. This application embodiment does not limit the application scenarios of the power supply system.

[0064] For example, when the power supply system is a power supply system for a digital computer room, each computer device in the digital computer room acts as a load. One end of the power supply system is connected to the power source, and the other end is connected to each computer device. The controller of the digital computer room is connected to the power supply system, each computer device, and the power source, respectively, to implement the power supply control method provided in the embodiments of this application. When the power supply system is a server cluster, the server cluster and its supporting air conditioning equipment act as loads. One end of the power supply system is connected to the power source, and the other end is connected to the server cluster and its supporting air conditioning equipment. The controller of the server cluster is connected to the power supply system, the server cluster, its supporting air conditioning equipment, and the power source, respectively, to implement the power supply control method provided in the embodiments of this application.

[0065] Please refer to Figure 3 , Figure 3 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 1 The following explanation uses the vehicle controller as an example to illustrate this power supply control method. This method is applied to... Figure 1 The power supply system shown. (As shown) Figure 3 As shown, the method may include the following steps 301 to 303:

[0066] Step 301: Obtain the first real-time output power provided by the power supply system to the load unit and the real-time total power demand of the load unit in the current operating mode.

[0067] The first real-time output power refers to the real-time output power that the power supply system can provide under the current operating mode. The real-time total demand power refers to the sum of the total power required by all low-voltage loads in the load unit at the current moment. Monitoring the first real-time output power and the real-time total demand power can determine whether the load unit is in a state of supply and demand balance, and this determination result can serve as the basis for subsequent control strategies.

[0068] In this embodiment of the application, the operating parameters of the power supply system can be obtained, and the first real-time output power provided by the power supply system to the load unit in the current working mode can be determined based on the operating parameters of the power supply system, as well as the real-time total power demand of the load unit can be determined.

[0069] The operating parameters of a power supply system refer to the current operating status of each component in the system, as well as data such as input and output voltage and current. These operating parameters reflect the real-time output capability of the power supply system and the instantaneous power demand of the load units.

[0070] The operating parameters of the power supply system include, but are not limited to: the real-time DC-DC output voltage U of the power supply system in the current operating mode. T_DC / DC The real-time DC-DC output current I of the power supply system in the current operating mode T_DC / DC Real-time current I0 of the battery, real-time currents I1 to I4 of the first to fourth load subsets, and real-time voltage U of the load unit. DC / DC In some embodiments, the operating parameters of the power supply system may also include the operating mode of the power replenishment system.

[0071] The process of determining the first real-time output power based on the operating parameters of the power supply system includes:

[0072] First real-time output power It is the DC power output in real time by the power supply system in the power supply system, and its calculation formula is:

[0073] .

[0074] The process of determining the real-time total power demand of a load unit based on the operating parameters of the power supply system includes:

[0075] Real-time total power demand of the load unit This is the sum of the power requirements of all low-voltage loads currently in operation. In this embodiment, the load unit includes a first load subset, a second load subset, a third load subset, and a fourth load subset. Therefore, the real-time total power requirement of the load unit is... That is, the sum of the total power demand of each of the four load subsets.

[0076] The total power demand of the first load subset Total power demand of the second load subset Total power demand of the third load subset Total power demand of the fourth load subset .

[0077] Real-time total power demand of the load unit .

[0078] In one implementation, this embodiment acquires the vehicle's operating status, the power supply system's operating status, and its real-time input voltage, input current, output voltage, and output current under its current operating mode. It also monitors the real-time current of the battery and each load subset branch, as well as the operating status of each load. Based on the vehicle's and its low-voltage power supply system's operating parameters, it calculates the DC / DC output power provided by the power supply system and the real-time power demand of the low-voltage loads, thus determining the power supply / demand relationship of the low-voltage power supply system.

[0079] Step 302: When the first real-time output power is unbalanced with the real-time total demand power, determine the target power supply management strategy based on the current operating mode of the power supply system.

[0080] Step 303: Adjust the power supply system according to the target power supply management strategy until the supply and demand of the load unit are balanced.

[0081] Among them, the target power supply management strategy is a control scheme that dynamically matches the current working mode after detecting an imbalance between supply and demand in the power supply system.

[0082] In this embodiment, the corresponding intelligent power allocation sub-control strategy for low-voltage load based on the power supply system can be dynamically matched and invoked according to the power supply / demand relationship of the current low-voltage power supply system. Based on the current working mode of the power supply system and the executed intelligent power allocation sub-control strategy for low-voltage load based on the power supply system, the corresponding prompt information is sent to the vehicle controller to remind and guide the user through the vehicle system.

[0083] In this embodiment, the target power supply management strategy includes a first strategy, a second strategy, and a third strategy. The first strategy includes a strategy for regulating the power supply system, such as switching its operating mode or limiting its output capacity to reduce its output power or increase its input power. The second strategy includes a strategy for regulating the power supply system and load units according to a preset sequence. The second strategy further regulates the load units based on the first strategy, such as shutting down certain non-critical loads or reducing their operating efficiency to reduce overall power demand. The third strategy includes a strategy for directly regulating the load units.

[0084] when This indicates a supply shortage in the power supply system, necessitating appropriate measures to restore balance. The selection of the target power supply management strategy depends on the operating mode of the current power supply system's supplementary power supply system and the limitations of its power supply capacity.

[0085] It should be noted that when the first real-time output power is unbalanced with the real-time total demand power, the first real-time output power can be considered as the maximum power that the power supply system can output in the current operating mode.

[0086] In the embodiments of this application, when At this time, the VCU can obtain the current operating mode of the power supply system, which includes charging mode, discharging mode, and DC power supply mode. It should be noted that in charging and discharging modes, the power supply system still supplies DC power to the load unit. However, in DC power supply mode, the power supply system does not charge or discharge externally.

[0087] The terms "charging mode" and " / or discharging mode" refer to the fact that the power supply system may be in charging mode, discharging mode, or a mode in which charging and discharging occur simultaneously, such as charging outside the vehicle and discharging inside the vehicle. Discharging inside the vehicle could be, for example, charging a mobile phone. Discharging modes include discharging inside the vehicle, discharging outside the vehicle, and discharging both inside and outside the vehicle simultaneously.

[0088] In one implementation, when the power supply system is currently operating in charging mode and / or discharging mode, the VCU can obtain the DC power output of the power supply system in charging mode and compare the magnitude of the DC power output of the power supply system in charging mode and / or discharging mode with the magnitude of the DC power output of the power supply system in DC power supply mode.

[0089] If the DC power output of the power supply system in charging mode is less than the DC power output of the power supply system in DC power supply mode (i.e., the maximum DC-DC output power), it means that when the power supply system is in charging mode and / or discharging mode, the DC power output of the power supply system is less than that of the DC power supply system in DC power supply mode. Limited by the current operating mode. In this case, the VCU can send an operating command to the power supply system, which then switches its current operating mode to DC power supply mode (DCDC mode) in response to the command, so that the real-time output power of the power supply system reaches the maximum DC-DC output power, thereby improving the power supply capacity.

[0090] It should be noted that, in this embodiment, after switching the current operating mode of the power supply system to DC power supply mode, the second real-time output power provided by the power supply system to the load unit in DC power supply mode is still monitored in real time, and the load unit is adjusted according to the second real-time output power. As an example, it can be determined whether the second real-time output power is less than the total real-time demand power. If the second real-time output power is less than the total real-time demand power, it indicates that the load unit is still in a state of supply-demand imbalance, and therefore further measures are needed to restore balance. In this case, the load unit needs to be adjusted to reduce the total real-time demand power. The strategy for adjusting the load unit is described below. If the second real-time output power is greater than or equal to the total real-time demand power, it indicates that the load unit has already achieved supply-demand balance, and therefore no adjustment of the load unit is required.

[0091] If the DC power output of the power supply system in charging mode is greater than or equal to the DC power output of the power supply system in DC power supply mode, it indicates that when the power supply system is in charging mode and / or discharging mode, the DC power output P of the power supply system is greater than or equal to the DC power output of the power supply system in DC power supply mode. E_DC / DC Since there are no restrictions, there is no need to regulate the power supply system. In this case, the target power management strategy is determined to be the third strategy, which includes strategies that directly regulate the load units.

[0092] In another implementation, when the first real-time output power is unbalanced with the real-time total power demand, the VCU can obtain the relationship between the maximum output power of the power supply system and the real-time total power demand. Here, the maximum output power of the power supply system refers to the maximum DC output power that the power supply system can provide to the load unit. The operating mode corresponding to the maximum output power of the power supply system may be a DC power supply mode or other modes; this application does not impose any restrictions on this.

[0093] If the maximum output power of the power supply system is greater than or equal to the real-time total demand power, it means that the demand of the load unit can be met by adjusting the power supply system. In this case, the target power supply management strategy is determined as the first strategy, which includes the strategy of adjusting the power supply system.

[0094] For example, the first strategy is to adjust the current operating mode of the power supply system to the operating mode corresponding to the maximum output power of the power supply system. The operating mode corresponding to the maximum output power of the power supply system may be a DC power supply mode or other modes, which are not limited here.

[0095] In this embodiment, the power supply system is adjusted to a mode that can provide maximum output power, thereby meeting the real-time total power demand of the load unit.

[0096] If the maximum output power of the power supply system is less than the real-time total power demand, it means that even if the power supply system is adjusted to its maximum output power, the load unit still cannot achieve supply and demand balance. In this case, the target power supply management strategy is determined to be the second strategy. The second strategy includes a strategy of adjusting the power supply system and the load unit according to a preset sequence.

[0097] In this embodiment, the preset sequence refers to the order in which the power supply system is regulated first, followed by the load unit. Regulating the power supply system, for example, involves switching its current operating mode to the operating mode corresponding to its maximum output power. The process of regulating the load unit is described below.

[0098] For example, if the current operating mode of the power supply system is charging mode, and the operating mode corresponding to the maximum output power of the power supply system is DC power supply mode, then the VCU can send an operating command to the power supply system, instructing the voltage supply system to switch to DC power supply mode.

[0099] In another implementation, in this embodiment of the application, when the current operating mode of the power supply system is DC power supply mode, the target power supply management strategy is determined to be the second strategy or the third strategy.

[0100] In this embodiment, when the power supply system is currently operating in DC power supply mode, it can be considered that the first real-time output power provided by the power supply system to the load unit in DC power supply mode is already the maximum output power of the power supply system. In this case, the power supply system has no adjustable margin, therefore the target power supply management strategy is determined to be the second strategy or the third strategy.

[0101] The process of regulating the power supply system according to the second strategy can be referred to the foregoing description, and the process of regulating the load unit can be referred to the following description.

[0102] It should be noted that the second strategy includes adjusting the power supply system and load unit according to a preset sequence. Specifically, if the DC power supply mode is detected as the operating mode corresponding to the maximum output power of the power supply system, then there is no need to adjust the power supply system further; instead, the load unit can be adjusted directly.

[0103] The power supply control method provided in this invention maximizes the use of mature power supply systems with advanced industry technology and performance. It is compatible with the increasing power demands of DC-DC converters due to the growing low-voltage loads in vehicles. By rationally planning the power distribution control strategy for the vehicle's low-voltage load while adapting to product development pace and application maturity, it not only maximizes product compatibility and extends product lifespan but also effectively controls product cost and size. This meets the power requirements of the vehicle's low-voltage power supply system, significantly reducing vehicle development costs and saving space. Through real-time, dynamic, and adaptive intelligent control of low-voltage load power distribution, it achieves power supply / demand balance for the low-voltage power supply system across all time domains and scenarios, effectively preventing serious malfunctions such as battery depletion due to low-voltage power supply system overload, which could render the vehicle unusable.

[0104] In another implementation, as described in the embodiments of this application, please refer to... Figure 4 , Figure 4 This is a flowchart illustrating a method for determining a target power management strategy according to an embodiment of this application. The method includes:

[0105] Step 401: When the power supply system is currently in charging mode and the maximum output power of the power supply system is greater than or equal to the real-time total power demand, obtain the current state of charge (SOC) of the battery cells of the power supply system.

[0106] The current state of charge (SOC) of a battery cell is defined as the ratio of the battery's remaining charge to its full capacity, and is typically expressed as a percentage. SOC is a crucial indicator for assessing whether a battery can continue discharging or requires recharging. In this embodiment, SOC is used to determine whether the battery has sufficient energy reserves to support subsequent power supply strategy decisions.

[0107] In this embodiment, the VCU can obtain the SOC information of the battery cell by reading data provided by the battery management system through the controller.

[0108] Step 402: Determine whether the current SOC is greater than the preset SOC threshold.

[0109] If the current SOC is greater than the preset SOC threshold, then proceed to step 403.

[0110] If the current SOC is not greater than the preset SOC threshold, proceed to step 404.

[0111] The preset SOC threshold is a reference value set according to requirements, used to determine whether the current SOC of the battery cell meets the execution conditions of subsequent power management strategies. For example, when the current SOC is higher than the preset SOC threshold, the VCU may determine that the battery has sufficient energy storage, thus ensuring a sufficient and continuous supply of power to the load cell. When the current SOC is lower than the preset SOC threshold, the VCU may determine that the battery has insufficient energy storage, which is insufficient to continuously and stably supply the required power to the load cell. Therefore, the VCU can provide a clear logical basis for switching power supply strategies based on the above determination results, to prevent battery over-discharge.

[0112] Setting the preset SOC threshold needs to consider several factors, including but not limited to the battery's maximum depth of discharge, load fluctuation range, and response time. For example, in some scenarios, to extend battery life, the preset SOC threshold may be set to 50%, meaning when the battery SOC is below 50%.

[0113] By comparing the current SOC with a preset SOC threshold, the VCU can quickly determine whether the battery is in the optimal power supply state and determine the appropriate target power supply management strategy accordingly.

[0114] Step 403: Determine the target power supply management strategy as the first strategy.

[0115] In this embodiment, when the power supply system is currently in charging mode and its maximum output power is greater than or equal to the real-time total power demand, it is demonstrated that the load unit's needs can be met simply by adjusting the power supply system. Furthermore, by determining that the current State of Charge (SOC) is greater than a preset SOC threshold, it is ensured that sufficient and continuous power can be provided to the load unit even when the power supply system stops charging. Based on this, the target power management strategy is determined as the first strategy.

[0116] In other words, the first strategy is a power management scheme based on sufficient power supply capacity, suitable for scenarios with high battery SOC. Under the first strategy, all low-voltage loads of the load unit can operate according to their normal needs, prioritizing the stable power supply to the low-voltage loads of the entire vehicle, while maximizing the output capacity of the power supply system to improve overall energy efficiency.

[0117] When the battery SOC is high, the first strategy can fully leverage the performance advantages of the power supply system, ensure the continuous and stable operation of the vehicle under low-voltage load, and improve user experience and system energy efficiency.

[0118] Step 404: Determine the target power supply management strategy as the second strategy.

[0119] In this embodiment, when the power supply system is currently operating in charging mode and its maximum output power is greater than or equal to the real-time total power demand, it is demonstrated that adjusting the power supply system alone can meet the load unit's requirements. However, when the current SOC is less than or equal to a preset SOC threshold, there may be a risk of insufficient power supply due to the low current SOC of the battery unit. Considering this situation, the VCU determines the target power supply management strategy as the second strategy.

[0120] As one possible implementation, if the power supply system is currently in charging mode and its maximum output power is greater than or equal to the real-time total power demand, and the current SOC is less than or equal to the preset SOC threshold, the VCU can set the target power management strategy to the third strategy.

[0121] Under the third strategy, the power supply system does not switch its operating mode and remains in charging mode to ensure power supply capacity. Based on this, the load units are regulated through the third strategy to reduce the real-time total power demand.

[0122] The second strategy can be implemented in ways including, but not limited to: switching the operating mode of the power supply system and adjusting the load units to reduce the real-time total power demand. Specifically, it involves switching the power supply system from charging mode to DC power supply mode to ensure that the power supply system can provide maximum output power in DC power supply mode. Simultaneously, it reduces the real-time total power demand of the load units by methods such as shutting down, reducing the power level, or reducing the load.

[0123] Under the second or third strategy, when regulating the load unit, some non-critical loads can be gradually restricted or shut down according to the priority and importance of the multiple low-voltage loads included in the load unit, so as to reduce the overall power consumption, ensure the normal operation of critical low-voltage loads (such as safety loads), and slow down the battery discharge rate.

[0124] When the battery SOC is low, the second strategy can effectively control power supply risks. The second strategy prevents the battery from being over-discharged, which helps to extend the battery life and improve the reliability and safety of the power supply system.

[0125] It should be noted that in this embodiment, when the power supply system is currently in charging mode and its maximum output power is greater than or equal to the real-time total power demand, the load unit's needs can be met simply by adjusting the power supply system. However, due to the low current SOC of the battery unit, there may be a risk of insufficient power supply. In this case, the VCU can also check if there is an engine and determine if it is running. If there is an engine and it is running, it means that the engine can continuously charge the battery unit. In this case, although the current SOC of the battery unit is low, after switching the power supply system from charging mode to DC power supply mode, the battery unit can still obtain power from the engine for replenishment, thereby ensuring a continuous and stable power supply to the load unit. Therefore, the target power management strategy can be determined as the first strategy.

[0126] In this embodiment of the application, by real-time calculation and comparison and This is to determine whether there is a supply / demand imbalance in the power supply system, thereby enabling timely detection of power shortages and triggering corresponding control measures to prevent system overload.

[0127] Based on the above embodiments, the process of regulating the load unit in the embodiments of this application is described below. This application also provides a power supply control method; please refer to [link / reference]. Figure 5 , Figure 5 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 2 The method includes:

[0128] Step 501: Obtain the first real-time output power provided by the power supply system to the load unit and the real-time total power demand of the load unit in the current operating mode.

[0129] Step 502: When the first real-time output power is unbalanced with the real-time total demand power, the target power supply management strategy is determined as the second strategy based on the current working mode of the power supply system.

[0130] In one implementation, when the power supply system is currently operating in charging mode and / or discharging mode, and the maximum output power of the power supply system is less than the real-time total power demand, the target power supply management strategy is determined to be the second strategy.

[0131] In another implementation, when the power supply system is currently operating in DC power supply mode, the target power supply management strategy is determined to be the second strategy.

[0132] In another implementation, when the power supply system is currently in charging mode and its maximum output power is greater than or equal to the real-time total power demand, but the current SOC of the battery cell is less than a preset SOC threshold, the target power supply management strategy is determined to be the second strategy.

[0133] Step 503: According to the second strategy, switch the current working mode of the power supply system to DC power supply mode.

[0134] In this embodiment, the operating mode corresponding to the maximum output power that the power supply system can provide to the load unit is the DC power supply mode. In this embodiment, when the target power management strategy is confirmed to be the second strategy, the VCU first regulates the power supply system according to the second strategy.

[0135] The VCU can send a working command to the power supply system to switch the working mode. In response to the working command, the power supply system switches the current working mode to DC power supply mode.

[0136] Step 504: Determine the output power of the power supply system in DC power supply mode to obtain the second real-time output power.

[0137] In this embodiment of the application, after the power supply system is regulated, the real-time output power provided by the power supply system to the load unit is defined as the second real-time output power (DC / DC output power).

[0138] It should be noted that the second real-time output power is the maximum output power that the power supply system can provide to the load unit. The second real-time output power may be the same as or greater than the first real-time output power.

[0139] Step 505: Determine the difference between the real-time total power demand and the second real-time output power, and adjust the real-time total power demand of the load unit according to the difference.

[0140] In this embodiment, after obtaining the second real-time output power, the real-time total power demand of the load unit can be adjusted based on the second real-time output power. This is achieved by: determining the difference between the real-time total power demand and the second real-time output power, and adjusting the real-time total power demand of the load unit based on the difference.

[0141] In this embodiment of the application, the load unit includes a first load subset, a second load subset, a third load subset, and a fourth load subset arranged in priority order. The first load subset includes touch switch type electronically controlled loads, the second load subset includes gear or load adjustable type electronically controlled loads, the third load subset includes mechanically controlled loads, and the fourth load subset includes driving safety type loads.

[0142] Among them, the real-time total power demand of the load unit This refers to the sum of the total power demand of each of the four load subsets.

[0143] In this embodiment, the VCU can determine multiple preset intervals based on the real-time total power demand of the first load subset, the second load subset, and the third load subset. Different preset intervals correspond to different control methods. Then, it determines which preset interval the difference between the real-time total power demand and the second real-time output power falls into, and controls the corresponding load subset according to the control method corresponding to the preset interval in which the difference falls.

[0144] The difference between the real-time total power demand and the second real-time output power reflects the gap between the maximum output power that the power supply system can provide in DC power supply mode and the real-time total power demand, used to determine whether there is a supply shortage. If the difference is positive, it indicates that the output power of the power supply system is insufficient, and measures need to be taken to adjust the load; if the difference is zero, it indicates that the supply and demand are balanced, and no further intervention is needed; if the difference is negative, it indicates that the output power of the power supply system is excessive, and it may be necessary to consider optimizing the load distribution or energy storage scheme.

[0145] In this embodiment, the power supply system can be regulated in the following ways: first, shutting down the touch-switch type loads in operation within the first load subset; second, reducing the duty cycle or speed of the adjustable loads in the second load subset; and third, disconnecting the physical control circuit of the third load subset. However, if the load units remain in a state of supply-demand imbalance after reducing the loads in the first, second, and third load subsets, this embodiment will not continue to regulate the low-voltage loads in the fourth load subset. This is because the fourth load subset is related to driving safety, and to ensure driving safety, the power supply needs of the low-voltage loads in the fourth load subset must be guaranteed.

[0146] In this embodiment of the application, the low-voltage loads in the fourth load subset are prohibited from being used for power regulation.

[0147] The following section describes the control process for each load subset in the load unit, using specific implementation details.

[0148] In this embodiment, the process of adjusting the real-time total power demand of the load unit based on the difference between the real-time total power demand and the second real-time output power includes, but is not limited to, the following methods:

[0149] The first method is to iterate through the loads in the first load subset that are in operation and shut down when the difference is less than or equal to the real-time total power demand of the first load subset until the supply and demand of the load units are balanced.

[0150] The first load subset includes touch switch type electronically controlled loads. Touch switch type electronically controlled loads are usually non-critical loads actively controlled by the user. Turning off the touch switch type electronically controlled loads in the first load subset will not affect the basic operating functions of the vehicle, and at the same time can quickly reduce the overall load power demand, thereby achieving a supply and demand balance.

[0151] Touch switch type electronically controlled loads include, for example, in-vehicle navigation systems, multimedia entertainment systems, and window control modules. Touch switch type electronically controlled loads are characterized by fast response speed, the ability to be turned on or off at any time, and generally do not involve complex mechanical structures.

[0152] In this system, the multiple low-voltage loads included in the first load subset are typically arranged according to a pre-set priority order. Traversal control refers to shutting down the loads in operation within the first load subset one by one according to their priority order. During the shutdown process, the real-time output power of the power supply system and the real-time total power demand of the load units are monitored in real time to determine whether the load units have achieved supply-demand balance. If so, the shutdown of the remaining loads is stopped.

[0153] The second approach is as follows: If the difference is greater than the real-time total power demand of the first load subset and less than or equal to the sum of the real-time total power demand of the first and second load subsets, the loads in the first load subset that are in operation are shut down, and the duty cycle or speed of the loads in the second load subset that are in operation is adjusted until the supply and demand of the load units are balanced.

[0154] In this embodiment, when the difference falls within a preset range that is greater than the total real-time power demand of the first load subset but less than or equal to the sum of the total real-time power demand of the first and second load subsets, it indicates that regulating only the first load subset is insufficient to achieve supply-demand balance for the load units. Therefore, after controlling the shutdown of the loads in the first load subset that are currently in operation, it is also necessary to iterate and adjust the duty cycle or speed of the loads in the second load subset that are currently in operation.

[0155] Duty cycle, in periodic switching control, refers to the proportion of time a device is in operation within a cycle. It is typically used to control loads with continuous speed regulation capabilities, such as fans and motors. For example, a fan with a 50% duty cycle will run for half the time of each cycle and stop for the other half, thus regulating the average power under periodic switching control. This control method effectively reduces power consumption while avoiding user experience issues caused by completely shutting down certain loads.

[0156] The "speed setting" refers to the operating level or grade of certain adjustable loads (such as air conditioner compressors and water pumps), with different speed settings corresponding to different output power. For example, an air conditioner compressor may have three speed settings: low, medium, and high, corresponding to lower, medium, and higher cooling capacities, respectively. During the adjustment process, the instantaneous power consumption of the adjustable load can be reduced by gradually decreasing its operating speed, thereby helping the system to restore power balance more quickly.

[0157] In this embodiment, as all loads in the first load subset are turned off and the load levels in the second load subset are lowered, the load decreases, causing the real-time total power demand of the load unit to continuously decrease. Based on this, the real-time output power of the power supply system and the real-time total power demand of the load unit are monitored in real time to determine whether the load unit has reached a supply-demand balance. If it has, the regulation is stopped.

[0158] The third method: When the difference is greater than the sum of the real-time total power demand of the first load subset and the second load subset, and less than or equal to the sum of the real-time total power demand of the first load subset, the loads in the first load subset that are in operation are shut down, and the duty cycle or speed of the loads in the second load subset that are in operation is adjusted, and the relays in the third load subset are disconnected, until the supply and demand of the load units are balanced.

[0159] In this embodiment, relay disconnection refers to cutting off the current path of the load branch connected to the relay element in the control circuit, thereby forcibly shutting down the load. In this embodiment, when a supply-demand imbalance of the load unit is detected and other control measures are insufficient to restore balance, a portion of the load in the third load subset will be further disconnected by relay disconnection to further reduce the total power demand of the load unit, with the expectation that the supply and demand of the load unit will reach balance.

[0160] In this embodiment, as all loads in the first load subset are turned off, the load levels in the second load subset are lowered, reducing the load. The relays in the loads of the third load subset are disconnected, causing the real-time total power demand of the load unit to continuously decrease. This results in the difference between the real-time total power demand and the second real-time output power becoming smaller and smaller until the difference reaches 0, meaning the load unit achieves supply-demand balance. In this case, regulation can be stopped.

[0161] In the above steps, there is a hierarchical relationship and synergistic effect among the first, second, and third load subsets. The first load subset, as a low-priority load, is prioritized for shutdown; the second load subset is controlled more flexibly by adjusting the duty cycle or gear; the third load subset, as a high-priority load, is finally rigidly limited by relay disconnection. The fourth load subset has the highest priority and is prohibited from being shut down. This hierarchical control strategy maximizes the use of available power in the power supply system while ensuring normal vehicle operation, avoiding functional limitations due to insufficient power.

[0162] The fourth method: If the difference is greater than the sum of the real-time total power demand of the first load subset, the second load subset, and the third load subset, the vehicle is determined to be in an abnormal operating state.

[0163] In this embodiment, when the difference between the second real-time output power provided by the power supply system and the real-time total demand power of the load unit exceeds the sum of the real-time total demand power of the first load subset, the second load subset, and the third load subset, it indicates that the power supply / demand relationship of the current system is severely unbalanced, possibly due to hardware failure, communication interruption, abnormal load startup, or other reasons. Continuing to operate in this state may lead to greater system problems or safety hazards. Therefore, when the difference falls within the range greater than the sum of the real-time total demand power of the first load subset, the second load subset, and the third load subset, the VCU determines that the vehicle is in an abnormal operating state.

[0164] In this scenario, the VCU can generate a notification message and send it to the user.

[0165] In this embodiment, the system determines that the vehicle is in an abnormal operating state when the difference is greater than the sum of the real-time total power demand of the first, second, and third load subsets. The system can promptly detect and respond to potential faults or abnormalities in the system, prevent further deterioration or damage, and ensure the safety and stability of the vehicle operation.

[0166] Based on the above embodiments, this application also provides a power supply management method, which explains the specific logic strategy of a low-voltage load power intelligent allocation control method based on a power supply system. Please refer to... Figure 6 As shown, Figure 6 This is a flowchart illustrating a power supply control method provided in an embodiment of this application. Figure 3 The method includes:

[0167] Step 601: Determine if the current vehicle is operating normally.

[0168] In this embodiment of the application, the normal operation of the vehicle can be determined by the vehicle's CAN bus communication signal.

[0169] If the vehicle is operating normally, proceed to step 602; if the vehicle is not operating normally, proceed to step 617.

[0170] Step 602: Read the vehicle's operating status.

[0171] In this embodiment, the VCU can read the vehicle's operating status, which includes, but is not limited to, the status and operating mode of the power supply system, the current SOC of the battery cells, the real-time current I0 of the battery, the real-time currents I1 to I4 of the first to fourth load subsets, and the real-time voltage of the load cells. Real-time DC-DC output voltage of the power supply system in the current operating mode Real-time DC-DC output current of the power supply system in the current operating mode Real-time DC-DC output power of the power supply system Real-time total power demand of the load unit Total power demand of the first load subset Total power demand of the second load subset Total power demand of the third load subset Total power demand of the fourth load subset and the first overload factor Second overload factor Parameters such as these.

[0172] Among them, the first overload factor

[0173] Second overload factor

[0174] Step 603: Determine whether the supply and demand of the low-voltage load power of the whole vehicle are in a balanced state.

[0175] In this embodiment of the application, based on the real-time DC-DC output voltage (i.e., the first real-time output power), output current and real-time current of the battery and each load subset branch of the power supply system obtained in step 602, it is verified and determined whether the power supply / demand of the vehicle's low-voltage load (i.e., the load unit) is in a balanced state.

[0176] If the supply and demand of the low-voltage load power of the whole vehicle are in a balanced state, proceed to step 604; if the supply and demand of the low-voltage load power of the whole vehicle are unbalanced, proceed to step 605.

[0177] Step 604: Maintain the current default low-voltage load power intelligent allocation first sub-control strategy based on the power supply system.

[0178] In this embodiment of the application, when it is confirmed that the power supply / demand of the vehicle's low-voltage load is in a balanced state, the current power allocation method is maintained unchanged. The first sub-control strategy is the strategy of maintaining the current power allocation method to the low-voltage load unchanged.

[0179] Step 605: Determine the current operating mode of the power supply system based on the vehicle's operating status.

[0180] The current operating modes of the power supply system include: charging mode, external discharge mode, internal discharge mode, simultaneous internal and external discharge mode, and DC power supply mode (i.e., DCDC mode).

[0181] Step 606: Confirm whether the power supply system is currently in charging mode.

[0182] If the power supply system is currently in charging mode, proceed to step 611.

[0183] If the power supply system is not currently in charging mode, proceed to step 607.

[0184] Step 607: Confirm whether the power supply system is currently in discharge mode.

[0185] Among them, external discharge mode, internal discharge mode, and simultaneous internal and external discharge mode are all discharge modes.

[0186] If the power supply system is currently in discharge mode, proceed to step 608.

[0187] If the power supply system is not currently in discharge mode, proceed to step 609.

[0188] Step 608: Determine whether the DC-DC capability of the power supply system is limited in discharge mode.

[0189] Among them, DC-DC capability refers to the DC power supply capability of the power supply system.

[0190] If the DC power output of the power supply system in discharge mode is less than the DC power output of the power supply system in DC power supply mode, then the DC-DC capability is considered limited.

[0191] If the DC power output of the power supply system in discharge mode is greater than or equal to the DC power output of the power supply system in DC power supply mode, then the DC-DC capability is determined to be unrestricted.

[0192] If DC-DC capability is limited, proceed to step 615.

[0193] If the DC-DC capability is not limited, proceed to step 609.

[0194] Step 609: Based on the current power supply and demand relationship of the low-voltage power supply system, and combined with the real-time current of the battery and each load subset branch and the operating status of each load, dynamically call the appropriate low-voltage load power distribution control strategy.

[0195] Step 610: Based on the current operating mode of the power supply system and the low-voltage load power intelligent distribution sub-control strategy implemented by the power supply system, send corresponding prompt information to the vehicle controller, and remind and guide the user through the vehicle's infotainment system.

[0196] Step 611: Determine whether the DC-DC capability of the power supply system is limited in charging mode.

[0197] If the DC power output of the power supply system in charging mode is less than the DC power output of the power supply system in DC power supply mode, then the DC-DC capability is determined to be limited.

[0198] If the DC power output of the power supply system in charging mode is greater than or equal to the DC power output of the power supply system in DC power supply mode, then the DC-DC capability is determined to be unrestricted.

[0199] If DC-DC capability is limited, proceed to step 612.

[0200] If the DC-DC capability is not limited, proceed to step 609.

[0201] Step 612: Determine whether the current SOC of the power battery is below the lower threshold.

[0202] The lower limit threshold is the preset SOC threshold.

[0203] If the current SOC is below the lower threshold, proceed to step 613.

[0204] If the current SOC is not lower than the lower threshold, proceed to step 615.

[0205] Step 613: Confirm whether there is an engine.

[0206] If an engine is present, proceed to step 614.

[0207] If there is no engine, proceed to step 615.

[0208] Step 614: Confirm whether the engine charging has started.

[0209] In this embodiment, engine charging start indicates that the engine can replenish the battery cell. Engine charging not start indicates that the engine cannot replenish the battery cell.

[0210] If the engine starts charging, proceed to step 615.

[0211] If the engine charging does not start, proceed to step 609.

[0212] Step 615: The power supply system switches its current operating mode from charging mode or discharging mode to DC power supply mode.

[0213] By switching the operating mode of the power supply system, the DC power output power of the power supply system can be ensured to be at its maximum.

[0214] Step 616: Determine whether the current load power supply and demand relationship has been restored to balance.

[0215] If the current load power supply and demand are balanced, proceed to step 610.

[0216] If the current load power supply and demand relationship is not balanced, proceed to step 609.

[0217] Step 617: The vehicle is detected to be in an abnormal state. Troubleshooting and repair are then carried out.

[0218] Based on the above embodiments, this application also provides a power supply management method, please refer to... Figure 7 , Figure 7 This is a flowchart illustrating a power supply management method provided in an embodiment of this application. The method includes:

[0219] Step 701: Determine the vehicle's operating status.

[0220] The vehicle's power-on action serves as the start of the cycle, and the vehicle's operating status is determined by reading CAN communication signals.

[0221] Vehicle operating status includes, but is not limited to, the status and operating mode of the power supply system, the current SOC of the battery cells, the real-time current I0 of the battery, the real-time currents I1 to I4 of the first to fourth load subsets, and the real-time voltage of the load cells. Real-time DC-DC output voltage of the power supply system in the current operating mode Real-time DC-DC output current of the power supply system in the current operating mode Real-time DC-DC output power of the power supply system Real-time total power demand of the load unit Total power demand of the first load subset Total power demand of the second load subset Total power demand of the third load subset Total power demand of the fourth load subset and the first overload factor Second overload factor Parameters, maximum output power of the DC-DC converter when the power supply system is operating in DC-DC mode The maximum output power of the DC-DC power supply system in charging mode. The maximum output power of the DC-DC converter when the power supply system is operating in external discharge or simultaneous internal and external discharge modes is... The maximum output power of the DC-DC power supply system operating in in-vehicle discharge mode. The lower limit of the available margin of the power battery .

[0222] in,

[0223] .

[0224] Step 702: Determine if the vehicle is currently in a faulty state.

[0225] Determine whether the vehicle is currently in a faulty state based on its operating status.

[0226] If the vehicle is in a faulty state, proceed to step 709.

[0227] If the vehicle is not in a faulty state, proceed to step 703.

[0228] Step 703: Determine if .

[0229] like If successful, proceed to step 704.

[0230] like If not, the current default low-voltage load power intelligent allocation first sub-control strategy based on the power supply system (DC-OBC) will continue to be executed: maintain the power supply system in normal operation in response to the working instructions of the vehicle controller (VCU) according to the current working mode.

[0231] Step 704: Determine whether the power supply system is in charging mode.

[0232] If the power supply system is not in charging mode, proceed to step 705.

[0233] If the power supply system is in charging mode, then continue to determine whether... .

[0234] like If the condition is not met, proceed to step 706.

[0235] like If true, then continue to determine whether the current condition is met. ,in That is, the preset SOC threshold.

[0236] like If the condition is met, the DC-OBC switches from charging mode to DC-DC mode; simultaneously, a corresponding prompt message is sent. The prompt message might be something like, "The vehicle has entered low-voltage load power intelligent distribution mode, temporarily disabling plug-in charging. Please wait for automatic recovery!" Then, the process returns to step 703 to continue the loop.

[0237] like If this is not the case, then continue to determine whether the engine charging has started.

[0238] If the engine charging does not start, proceed to step 706.

[0239] If engine charging starts, the power supply system switches from charging mode to DC-DC mode. Simultaneously, a message is sent: "Vehicle has entered low-voltage load power intelligent distribution mode, temporarily disabling plug-in charging and temporarily activating engine charging mode. Please wait for automatic recovery!" The system then returns to step 703 to continue the loop judgment.

[0240] It should be noted that the presence or absence of this engine charging mode depends on the actual power type of the vehicle. If it is not present, no judgment will be made regarding this function.

[0241] Step 705: Determine whether the power supply system is in discharge mode.

[0242] The discharge mode includes any one of the following: external discharge, simultaneous internal and external discharge, or internal discharge.

[0243] If the power supply system is not in discharge mode, proceed to step 706.

[0244] If the power supply system is in discharge mode, then determine whether... Or whether .

[0245] like It is not true, and If the condition is not met, proceed to step 706.

[0246] like Established, or If successful, the DC-OBC will switch from discharge mode to DC-CDC mode; simultaneously, a corresponding prompt message will be sent. The prompt message may be something like, "The vehicle has entered low-voltage load power intelligent distribution mode, temporarily disabling the discharge function. Please wait for automatic recovery!", and the process will return to step 703 to continue the loop judgment.

[0247] Step 706: Determine if .

[0248] like If successful, the second sub-control strategy for intelligent low-voltage load power allocation based on DC-OBC (Power Supply System) is executed: Loads 1n in operation of the first load subset branch are traversed and shut down according to usage priority until the low-voltage load power supply / demand is balanced; simultaneously, a corresponding prompt message is sent. The prompt message may be, for example, "The vehicle has entered the intelligent low-voltage load power allocation mode. Some low-voltage loads have been temporarily disabled. Please wait for automatic recovery!", and the process returns to step 703 to continue the loop judgment.

[0249] like If not, proceed to step 707.

[0250] In this application embodiment, the control method for the first load subset branch of the low-voltage load power intelligent allocation second sub-control strategy based on the power supply system (DC-OBC) includes: as shown in Table 1, Table 1 exemplarily shows a priority sorting of low-voltage loads and its real-time working flag bit correspondence table.

[0251] According to the low-voltage load shown in Table 1 below Priority sorting and its real-time working flags Determine the priority Rank of the load to be controlled 1n. ), and traverse the shutdown of control load 1n in priority order.

[0252] Table 1

[0253]

[0254] Step 707: Determine if .

[0255] like If successful, the third sub-control strategy of intelligent low-voltage load power allocation based on DC-OBC is executed: all loads 1n in the first load subset branch that are in operation are shut down; the load / level of loads 2j in the second load subset branch that are in operation are traversed and adjusted according to usage priority until the supply / demand of low-voltage load power is balanced; at the same time, a corresponding prompt message is sent. The prompt message is, for example, "The vehicle has entered the intelligent low-voltage load power allocation mode. Some low-voltage loads have been temporarily disabled and restricted. Please wait for automatic recovery!", and the process returns to step 703 to continue the loop judgment.

[0256] like If the condition is not met, proceed to step 708.

[0257] In this embodiment of the application, the control method for the second load subset branch of the third sub-control strategy for intelligent power allocation of low-voltage load based on DC-OBC includes: as shown in Table 2, Table 2 exemplarily shows a power consumption-gear / duty cycle relationship table for a low-voltage load.

[0258] According to the low-voltage load shown in Table 1 Priority sorting and its real-time working flags Determine the priority Rank of the load to be controlled 2j. The specific method is as follows: (The following text appears to be a separate, unrelated section and is not translated:)

[0259] Based on the current load 2j's operating gear / duty cycle Corresponding power consumption Calculate its target controlled power consumption According to Table 2, the target power consumption can be adjusted. The corresponding target control level / duty cycle (following the principle of power consumption being the closest to less).

[0260] Table 2

[0261]

[0262] It should be noted that Tables 1 and 2 shown in the embodiments of this application are only used to illustrate the specific control method of this scheme, and do not represent the actual design parameters of the corresponding loads. The parameters should be determined according to their actual calibration results. Tables 1 and 2 do not constitute unique limitations. In particular, load 2j has its own corresponding power consumption-level / duty cycle Map table. The correspondence shown in Table 2 is only an example and not a unique limitation.

[0263] Step 708: Determine if

[0264] like If successful, the fourth sub-control strategy of intelligent low-voltage load power allocation based on DC-OBC is executed: all loads 1n in the first load subset branch that are in operation are turned off; the load / level of all loads 2j in the second load subset branch that are in operation is adjusted; and relay S1 in the third load subset branch is disconnected until the supply / demand of low-voltage load power is balanced. Simultaneously, a corresponding prompt message is sent. The prompt message may be, for example, "The vehicle has entered the intelligent low-voltage load power allocation mode. Some low-voltage loads have been temporarily disabled and restricted. Please wait for automatic recovery!", and the process returns to step 703 to continue the loop judgment.

[0265] like If the condition is not met, proceed to step 709.

[0266] The control method for the second load subset branch of the fourth sub-control strategy for intelligent power distribution of low-voltage loads based on DC-OBC is as follows: According to the low-voltage load shown in Table 1... Priority sorting and its real-time working flags Determine the priority Rank of the load to be controlled 2j. ), and traverse the gears / duty cycles of the load 2j in priority order.

[0267] The specific method is as follows: based on the current load 2j's operating gear / duty cycle. Corresponding power consumption Calculate its target controlled power consumption According to Table 2, the target power consumption can be adjusted. The corresponding target control level / duty cycle (following the principle of power consumption being the closest to less).

[0268] Step 709: Determine that the vehicle is in an abnormal operating state.

[0269] Check and confirm the operating status of the vehicle and low-voltage power supply system; at the same time, send a prompt message "The current vehicle is operating abnormally. Please check and confirm the operating status of the vehicle and low-voltage power supply system!", and this cycle ends.

[0270] In the embodiments of this application, abnormal operating states include, but are not limited to, high voltage failure on the vehicle, abnormal power battery or storage battery, abnormal CAN communication, poor line connection, and fault reporting modes.

[0271] The power supply control method provided in this application is based on an innovative mechanism that dynamically allocates various components of the vehicle's low-voltage system for adaptive and lean energy management, thereby improving the system robustness and cost-effectiveness of the low-voltage DC power network. Furthermore, this power supply control method and power supply system can be easily extended to other fields, or applied only to any structural variant with DC-DC conversion capabilities, and can serve as a useful reference for other components / systems requiring energy management.

[0272] It should be understood that the steps in the accompanying drawings of the above embodiments are not necessarily executed in the order indicated in the drawings. Unless otherwise expressly stated herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in these drawings may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0273] Please refer to Figure 8 , Figure 8 This is a schematic diagram of the logical architecture of a vehicle controller provided in an embodiment of this application. The vehicle controller 800 includes a low-voltage power supply system energy management unit 801 based on a DC-OBC. This unit can acquire the vehicle's operating status, power source supply status, and load demand status. The vehicle's operating status can be obtained by monitoring parameters such as vehicle speed, temperature, handling, and SOC. The power source supply status can be obtained by monitoring the DC-OBC's operating status and power parameters, as well as the battery status and voltage and current parameters. The load demand status can be obtained by monitoring the battery status and voltage and current parameters, as well as the low-voltage load's operating status and power parameters.

[0274] The vehicle controller 800 also includes a low-voltage load power intelligent distribution control unit 802 based on DC-OBC. The low-voltage load power intelligent distribution control unit based on DC-OBC is used to match appropriate target management strategies according to the vehicle operating status, power source supply status and load demand status, and to perform regulation of DC-OBC and regulation of load units according to the target management strategies.

[0275] like Figure 8As shown, the low-voltage load power intelligent distribution control unit based on DC-OBC can control touch-switch type electronically controlled loads such as audio equipment, LED ambient lighting, and seat heaters; control adjustable-speed / load type electronically controlled loads such as blowers, fans, and water pumps; control loads that can only be operated via physical buttons / switches, such as high beams and interior lighting / reading lights; and control loads related to driving safety and other types, such as brake lights, windshield wipers, radar, and EPS.

[0276] In addition, the low-voltage load power intelligent distribution control unit based on DC-OBC can also send corresponding prompts to the vehicle controller, reminding and guiding the user through the vehicle's infotainment system.

[0277] Corresponding to the intelligent low-voltage load power distribution system and control method based on the power supply system in the above embodiments, this embodiment also provides an intelligent low-voltage load power distribution control device based on the power supply system, applied to the vehicle controller (VCU). The control device for intelligent low-voltage load power distribution based on the power supply system is configured as follows: Figure 8 Designed and developed based on the intended logical architecture. Please refer to... Figure 9 , Figure 9 This is a schematic diagram of the structure of a power supply management device provided in an embodiment of this application. Figure 1 The power supply management device includes a data acquisition module 910, a status monitoring module 920, a strategy control module 930, and an information prompting module 940. The functions of each module are described in detail below.

[0278] The data acquisition module 910 is used to acquire the vehicle's operating status, the working status of the power supply system and its real-time input voltage, input current, output voltage and output current under the current working mode, and to monitor the real-time current of the battery and each load subset branch and the operating status of each load.

[0279] The data acquisition module 910 includes:

[0280] The first data acquisition submodule 911 is used to read vehicle operating data such as vehicle speed, temperature, control, and power battery SOC.

[0281] The second data acquisition submodule 912 is used to read the working status of the power supply system and the real-time input voltage, input current, output voltage and output current and other parameters in its current working mode.

[0282] The third data acquisition submodule 913 is used to read real-time current of the battery and each load subset branch, as well as the operating status of each load and other data.

[0283] In this embodiment, the status monitoring module 920 is used to calculate the DC / DC output power provided by the power supply system and the real-time power demand of the low-voltage load based on the operating parameters of the vehicle and its low-voltage power supply system, and to determine the power supply / demand relationship of the low-voltage power supply system.

[0284] In this embodiment, the strategy control module 930 is used to dynamically match and call the corresponding low-voltage load power distribution sub-control strategy according to the power supply / demand relationship of the current low-voltage power supply system.

[0285] The strategy control module 930 includes:

[0286] The first strategy control submodule 931 defaults to the first sub-control strategy of intelligent power allocation of low-voltage load based on the power supply system. This strategy is used to maintain the power supply system (DC-OBC) in normal operation according to the current working mode in response to the working instructions of the vehicle controller VCU when the power supply / demand relationship of the current low-voltage power supply system is confirmed to be in a balanced state.

[0287] The second strategy control submodule 932 is used to dynamically match and call the corresponding second / third / fourth sub-control strategies for intelligent power allocation of low-voltage loads based on the power supply system when the power supply / demand relationship of the current low-voltage power supply system is confirmed to be unbalanced.

[0288] In this embodiment, the information prompting module 940 is used to send corresponding prompt information to the vehicle controller when the power supply / demand of the low-voltage load is in an unbalanced state, and according to the current working mode of the power supply system and the low-voltage load power intelligent distribution sub-control strategy based on the power supply system, so as to remind and guide the user through the vehicle system.

[0289] Specifically: When the data acquisition module 910 confirms that the vehicle is in an abnormal operating state, the power supply system sends a prompt message to the vehicle controller: "The current vehicle is operating abnormally. Please check and confirm the operating status of the vehicle and the low-voltage power supply system!"

[0290] When the data acquisition module 910 confirms that the power supply system is in charging mode and determines that the DC-DC (maximum output power) capability is limited in charging mode, and at the same time, the power battery SOC is lower than the lower limit and the engine charging mode is not activated, the power supply system sends a prompt message to the vehicle controller: "The vehicle has entered the low-voltage load power intelligent distribution mode, and the plug-in charging function is temporarily disabled. Please wait for automatic recovery!"

[0291] When the data acquisition module 910 confirms that the power supply system is in charging mode and determines that the DC-DC (maximum output power) capability is limited in charging mode, and the engine charging mode has been activated, the power supply system sends a prompt message to the vehicle controller: "The vehicle has entered the low-voltage load power intelligent distribution mode, temporarily disabling the plug-in charging function and temporarily activating the engine charging mode. Please wait for automatic recovery!"

[0292] When the data acquisition module 910 confirms that the power supply system is in discharge mode and determines that the DC-DC (maximum output power) capability is limited in discharge mode, the power supply system sends a prompt message to the vehicle controller: "The vehicle has entered the low-voltage load power intelligent distribution mode, and the discharge function is temporarily disabled. Please wait for automatic recovery!"

[0293] When the strategy control module 930 confirms that the second sub-control strategy for intelligent low-voltage load power allocation based on the power supply system has been dynamically matched and invoked, the power supply system sends a prompt message to the vehicle controller: "The vehicle has entered the intelligent low-voltage load power allocation mode. Some low-voltage loads have been temporarily disabled. Please wait for automatic recovery!"

[0294] When the strategy control module 930 confirms that the third or fourth sub-control strategy of intelligent low-voltage load power allocation based on the power supply system has been dynamically matched and called, the power supply system sends a prompt message to the vehicle controller: "The vehicle has entered the intelligent low-voltage load power allocation mode. Some low-voltage loads have been temporarily disabled and restricted. Please wait for automatic recovery!"

[0295] In another embodiment of this application, a power supply control device is provided, please refer to... Figure 10 , Figure 10 This is a schematic diagram of the structure of a power supply control device provided in an embodiment of this application. Figure 2 The power supply control device 1000 is applied to the power supply system of a vehicle. The power supply system includes a power replenishment system and a load unit, and may include: an acquisition module 1001, a strategy determination module 1002, and a control module 1003.

[0296] The acquisition module 1001 is used to acquire the first real-time output power provided by the power supply system to the load unit and the real-time total power demand of the load unit in the current working mode.

[0297] The strategy determination module 1002 is used to determine a target power supply management strategy based on the current working mode of the power supply system when the first real-time output power is unbalanced with the real-time total demand power. The target power supply management strategy includes a first strategy and a second strategy. The first strategy includes a strategy for regulating the power supply system, and the second strategy includes a strategy for regulating the power supply system and the load unit in a preset order.

[0298] The control module 1003 is used to control the power supply system according to the target power supply management strategy until the supply and demand of the load unit are balanced.

[0299] In one embodiment, the strategy determination module 1002 is specifically used for:

[0300] Obtain the current operating mode of the power supply system; the operating mode includes one of the following: charging mode, discharging mode, and DC power supply mode;

[0301] If the power supply system is currently in charging mode and / or discharging mode, and the maximum output power of the power supply system is greater than or equal to the real-time total power demand, the target power supply management strategy is determined as the first strategy.

[0302] When the current operating mode of the power supply system is charging mode and / or discharging mode, and the maximum output power of the power supply system is less than the real-time total power demand, the target power supply management strategy is determined to be the second strategy.

[0303] Given that the power supply system is currently operating in DC power supply mode, the target power supply management strategy is determined to be the second strategy.

[0304] In one embodiment, the strategy determination module 1002 is specifically used for:

[0305] When the power supply system is currently in charging mode and its maximum output power is greater than or equal to the real-time total power demand, the current state of charge (SOC) of the battery cells in the power supply system is obtained.

[0306] Determine whether the current SOC is greater than the preset SOC threshold;

[0307] If the current SOC is greater than the preset SOC threshold, the target power supply management strategy is determined as the first strategy;

[0308] If the current SOC is less than or equal to the preset SOC threshold, the target power supply management strategy is determined to be the second strategy.

[0309] In one embodiment, the target power supply strategy is the first strategy, and the control module 1003 is specifically used to switch the current working mode of the power supply system to the DC power supply mode.

[0310] In one embodiment, the target power supply strategy is the second strategy, and the control module 1003 is specifically used to: switch the current working mode of the power supply system to the DC power supply mode; determine the output power of the power supply system in the DC power supply mode to obtain the second real-time output power; determine the difference between the real-time total demand power and the second real-time output power; and control the real-time total demand power of the load unit according to the difference.

[0311] In one embodiment, the load unit includes a first load subset, a second load subset, a third load subset, and a fourth load subset arranged in priority order, wherein the first load subset includes touch switch type electronically controlled loads, the second load subset includes gear or load adjustable type electronically controlled loads, the third load subset includes mechanically controlled loads, and the fourth load subset includes driving safety type loads; the control module 1003 is specifically used for:

[0312] If the difference is less than or equal to the real-time total power demand of the first load subset, the loads in the first load subset that are in operation are shut down until the supply and demand of the load units are balanced.

[0313] In one embodiment, the control module 1003 is specifically used to: when the difference is greater than the real-time total demand power of the first load subset and less than or equal to the sum of the real-time total demand power of the first load subset and the second load subset, traversely control the loads in the first load subset that are in operation to shut down, and traversely control the duty cycle or level of the loads in the second load subset that are in operation, until the supply and demand of the load units reach a balance.

[0314] In one embodiment, the control module 1003 is specifically used to: when the difference is greater than the sum of the real-time total demand power of the first load subset and the second load subset, and less than or equal to the sum of the real-time total demand power of the first load subset, the second load subset and the third load subset, traversely control the loads in the first load subset that are in the running state to turn off, traversely control the duty cycle or level of the loads in the second load subset that are in the running state, and control the relays in the third load subset to disconnect, until the supply and demand of the load units reach a balance.

[0315] In one embodiment, the control module 1003 is specifically used to determine that the vehicle is in an abnormal operating state when the difference is greater than the sum of the real-time total power demand of the first load subset, the second load subset and the third load subset.

[0316] Each module in the aforementioned power supply control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0317] Please refer to Figure 11 , Figure 11 This is a schematic diagram of the hardware structure of a vehicle provided in an embodiment of this application. The vehicle includes a processor, a memory, and a communication bus. The vehicle may include a communication interface 1101, a memory 1102, and a processor 1103; the various components are coupled together through a bus system 1104. It is understood that the bus system 1104 is used to realize the connection and communication between these components. In addition to a data bus, the bus system 1104 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 11 The general designated all buses as Bus System 1104.

[0318] In this embodiment, the communication interface 1101 is used for receiving and sending signals during the process of sending and receiving information with other external devices; the memory 1102 is used for storing a computer program that can run on the processor 1103; the processor 1103 is used to execute the steps of any of the power supply control methods described in the foregoing embodiments when running the computer program.

[0319] It is understood that the communication interface 1101 in this embodiment includes an input unit, such as a keyboard or mouse; an output unit, such as various types of displays or speakers; a storage unit, such as a disk or optical disk; and a communication unit, such as a network card, modem, or wireless transceiver. The communication unit allows the vehicle to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0320] The memory 1102 in this embodiment can be volatile memory or non-volatile memory, or it can include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1102 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory. The memory 1102 stores various programs and data required to perform the power supply control methods provided in the embodiments of this application.

[0321] The processor 1103 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 1103 or by instructions in software form. The processor 1103 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 1102. Processor 1103 reads the information in memory 1102 and completes the steps of the above method in conjunction with its hardware.

[0322] It is also understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or combinations thereof.

[0323] For software implementation, the techniques described herein can be implemented through modules (e.g., procedures, functions, etc.) that perform the functions described herein. Software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or externally. Wherein, if implemented as a software functional module and not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in this embodiment. The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, and various other media capable of storing program code.

[0324] Therefore, this embodiment provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the power supply control method described in the foregoing embodiment.

[0325] In yet another embodiment of this application, a computer program product is also provided, including a computer program or instructions that, when executed by a processor, implement the steps of the power supply control method as described in the foregoing embodiments.

[0326] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0327] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0328] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0329] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method or device embodiments.

[0330] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A power supply control method characterized by, The power supply control method is applied to a power supply system including a power supply system and a load unit, and comprises the following steps: obtaining a first real-time output power provided by the power supply system to the load unit in a current working mode and a real-time total demand power of the load unit; in a case where the first real-time output power is not balanced with the real-time total demand power, determining a target power supply management strategy according to a working mode in which the power supply system currently locates; wherein the target power supply management strategy includes a first strategy and a second strategy, the first strategy includes a strategy of regulating the power supply system, and the second strategy includes a strategy of regulating the power supply system and the load unit in a preset order; regulating the power supply system according to the target power supply management strategy until the supply and demand of the load unit are balanced.

2. The power supply control method according to claim 1, wherein The target power supply management strategy is determined according to the working mode in which the power supply system currently locates, and comprises the following steps: obtaining the working mode in which the power supply system currently locates; wherein the working mode includes one of the following: a charging mode, a discharging mode and a direct current power supply mode; in a case where the working mode in which the power supply system currently locates is the charging mode and / or the discharging mode, and the maximum output power of the power supply system is greater than or equal to the real-time total demand power, determining that the target power supply management strategy is the first strategy; in a case where the working mode in which the power supply system currently locates is the charging mode and / or the discharging mode, and the maximum output power of the power supply system is less than the real-time total demand power, determining that the target power supply management strategy is the second strategy; in a case where the working mode in which the power supply system currently locates is the direct current power supply mode, determining that the target power supply management strategy is the second strategy.

3. The power supply control method according to claim 2, wherein The target power supply management strategy is determined according to the working mode in which the power supply system currently locates, and comprises the following steps: in a case where the working mode in which the power supply system currently locates is the charging mode, and the maximum output power of the power supply system is greater than or equal to the real-time total demand power, obtaining a current state of charge (SOC) of a battery unit of the power supply system; determining whether the current SOC is greater than a preset SOC threshold value; in a case where the current SOC is greater than the preset SOC threshold value, determining that the target power supply management strategy is the first strategy; in a case where the current SOC is less than or equal to the preset SOC threshold value, determining that the target power supply management strategy is the second strategy.

4. The power supply control method according to any one of claims 1 to 3, characterized by, The target power supply management strategy is the second strategy, and the power supply system is regulated according to the target power supply management strategy, comprising the following steps: switching the working mode in which the power supply system currently locates to the direct current power supply mode; determining an output power of the power supply system in the direct current power supply mode to obtain a second real-time output power; determining a difference between the real-time total demand power and the second real-time output power; The real-time total demand power of the load unit is regulated according to the difference.

5. The power supply control method according to claim 4, wherein The load unit comprises a first load subset, a second load subset, a third load subset and a fourth load subset arranged in order of priority, wherein the first load subset comprises touch switch type electrically controlled loads, the second load subset comprises gear or load adjustable type electrically controlled loads, the third load subset comprises mechanically controlled loads, and the fourth load subset comprises driving safety type loads. The regulation of the real-time total demand power of the load unit according to the difference comprises: In the case that the difference is less than or equal to the real-time total demand power of the first load subset, the loads in the running state in the first load subset are controlled to be turned off one by one until the supply and demand of the load unit reaches balance.

6. The power supply control method according to claim 5, wherein The regulation of the real-time total demand power of the load unit according to the difference comprises: In the case that the difference is greater than the real-time total demand power of the first load subset and less than or equal to the sum of the real-time total demand power of the first load subset and the second load subset, the loads in the running state in the first load subset are controlled to be turned off one by one, and the duty cycle or gear of the loads in the running state in the second load subset is regulated one by one, until the supply and demand of the load unit reaches balance.

7. The power supply control method according to claim 5, wherein The regulation of the real-time total demand power of the load unit according to the difference comprises: In the case that the difference is greater than the sum of the real-time total demand power of the first load subset and the second load subset and less than or equal to the sum of the real-time total demand power of the first load subset, the second load subset and the third load subset, the loads in the running state in the first load subset are controlled to be turned off one by one, the duty cycle or gear of the loads in the running state in the second load subset is regulated one by one, and the relays in the third load subset are controlled to be turned off one by one, until the supply and demand of the load unit reaches balance.

8. The power supply control method according to claim 5, wherein The regulation of the real-time total demand power of the load unit according to the difference comprises: In the case that the difference is greater than the sum of the real-time total demand power of the first load subset, the second load subset and the third load subset, it is determined that the vehicle is in an abnormal running state.

9. A power supply control device characterized by comprising: The power supply control device is applied to a power supply system comprising a power supply system and a load unit, and comprises: An acquisition module is configured to acquire a first real-time output power provided by the power supply system to the load unit in a current working mode and a real-time total demand power of the load unit; A strategy determination module is configured to determine a target power supply management strategy according to the working mode of the power supply system in the case that the first real-time output power and the real-time total demand power are unbalanced, wherein the target power supply management strategy comprises a first strategy and a second strategy, the first strategy comprises a strategy of regulating the power supply system, and the second strategy comprises a strategy of regulating the power supply system and the load unit in a preset order. The regulation module is configured to regulate the power supply system according to the target power supply management strategy until the supply and demand of the load unit reach balance.

10. A power supply system characterized by comprising: The vehicle control device is connected with the power supply system and the load unit, and is configured to execute the power supply control method according to any one of claims 1 to 8 to regulate the power supply system or regulate the power supply system and the load unit until the supply and demand of the load unit reach balance. The power supply system is configured to supply power to the load unit. The vehicle control device is connected with the power supply system and the load unit, and is configured to execute the power supply control method according to any one of claims 1 to 8 to regulate the power supply system or regulate the power supply system and the load unit until the supply and demand of the load unit reach balance.

11. A vehicle characterized by comprising: The computer program is stored in the memory and executable on the processor, and when executed by the processor, the computer program implements the power supply control method according to any one of claims 1 to 8.

12. A computer storage medium, characterized in that The computer storage medium stores computer execution instructions, and when the computer execution instructions are executed by the processor, the computer execution instructions are configured to implement the power supply control method according to any one of claims 1 to 8.

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