Power supply management method for low-voltage system of vehicle and related device
By constructing a low-voltage management system and optimizing the power supply method using relays and power components, the problem of high energy consumption in vehicle low-voltage systems was solved, achieving more efficient power management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-04-14
Smart Images
Figure CN121849066A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage power supply technology for vehicles, and in particular to a method and related apparatus for low-voltage system power supply management of vehicles. Background Technology
[0002] Regarding the power supply issue of intelligent electric vehicles, the energy consumption management of the vehicle's low-voltage system is often overlooked. In existing energy management solutions, as soon as the vehicle is activated, it outputs power from the high-voltage system to the low-voltage system via a DC-DC converter, keeping the high-voltage system powered. While this solution effectively maintains the low-voltage system's state, it inevitably leads to unnecessary energy consumption and loss. This results in a significant daily drain on the battery pack, even when the vehicle is not in motion. Therefore, existing management solutions suffer from high energy consumption. Summary of the Invention
[0003] To address the aforementioned issues, embodiments of this application provide a low-voltage system power supply management method and related apparatus for vehicles, which can effectively reduce the energy consumption of existing low-voltage systems and thus provide more sufficient power to the entire vehicle.
[0004] According to one aspect of the embodiments of this application, a low-voltage system power supply management method for a vehicle is proposed, applied to a low-voltage management system of the vehicle. The low-voltage management system includes a first relay, a second relay, a main power supply, a battery, a supercapacitor, a load unit, and a control unit. The method is executed in the control unit, and the method includes: The vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status are obtained. The opening and closing states of the first relay and the second relay are determined based on the bus network status of the vehicle, the energy status of the battery, and the energy status of the supercapacitor. When the first relay is in the off state and the second relay is in the off state, the battery supplies power to the load unit; When the first relay is in the open state and the second relay is in the closed state, the supercapacitor supplies power to the load unit. When the first relay is in the closed state and the second relay is in the open state, the battery and the main power supply provide power to the load unit; When the first relay is closed and the second relay is closed, the main power supply, the supercapacitor, and the battery together provide low-voltage power to the load unit.
[0005] In the above scheme, determining the opening / closing state of the first relay and the second relay based on the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status includes: If the vehicle's bus network is in a wake-up state, and the battery's power status is fault-free and the supercapacitor's power status is fault-free, then the first relay's open / closed state is determined to be closed, and the second relay's open / closed state is determined to be closed. If the vehicle's bus network is in a dormant state, then the first relay is determined to be closed, and the second relay is determined to be open.
[0006] In the above scheme, determining the opening / closing state of the first relay and the second relay based on the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status further includes: If the battery's electrical state is a short circuit fault, then the first relay's open / closed state is determined to be open, and the second relay's open / closed state is determined to be closed. If the supercapacitor's electrical state is a short-circuit fault, then the first relay's open / closed state is determined to be closed, and the second relay's open / closed state is determined to be open. If the battery is in a depleted state and / or the supercapacitor is in a depleted state, then the first relay is determined to be in a closed state, and the second relay is determined to be in a closed state.
[0007] In the above scheme, the method further includes: If the main power supply experiences a line fault with no power output, then the opening and closing state of the first relay is determined to be the open state, and the opening and closing state of the second relay is determined to be the open state. If a short circuit fault occurs in the load unit, the first relay is determined to be in the open state, and the second relay is determined to be in the closed state.
[0008] In the above scheme, the method further includes: If the vehicle's bus network is in a wake-up state and the vehicle is in an unlocked high-voltage state, the output voltage of the main power supply is determined based on the battery's energy state and the ambient temperature of the vehicle. If the vehicle's bus network is in a wake-up state and the vehicle enters a low-power load mode, the output voltage of the main power supply will be reduced to a preset output voltage.
[0009] In the above scheme, the conditions for the vehicle to enter the low-power consumption mode include: If an active command for entering the low-power load mode is received from the vehicle, it is determined that the vehicle meets the conditions for entering the low-power load mode. If the power battery of the vehicle is lower than a preset power threshold, then the vehicle is determined to meet the conditions for entering the low power consumption mode. If the vehicle's remaining driving range is lower than the preset range, then the vehicle is determined to meet the conditions for entering the low-power consumption mode. If the main power supply experiences an interruption in output power, then the vehicle is determined to meet the conditions for entering the low power consumption mode.
[0010] In the above scheme, the method further includes: If the vehicle's bus network is in a dormant state and the vehicle is locked, then the output of the main power supply is stopped so that the battery can supply power to the load unit. If the battery is in a depleted state, it will be recharged by the main power supply.
[0011] According to one aspect of the embodiments of this application, a low-voltage system power supply management device for a vehicle is provided, applied to the low-voltage management system of the vehicle. The low-voltage management system includes a first relay, a second relay, a main power supply, a battery, a supercapacitor, a load unit, and a control unit. The device includes: The acquisition unit is used to acquire the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status. The determining unit is used to determine the opening and closing states of the first relay and the second relay based on the bus network status of the vehicle, the energy status of the battery and the energy status of the supercapacitor. When the first relay is in the off state and the second relay is in the off state, the battery supplies power to the load unit; When the first relay is in the open state and the second relay is in the closed state, the supercapacitor supplies power to the load unit. When the first relay is in the closed state and the second relay is in the open state, the battery and the main power supply provide power to the load unit; When the first relay is closed and the second relay is closed, the main power supply, the supercapacitor, and the battery together provide low-voltage power to the load unit.
[0012] According to one aspect of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the low-voltage system power supply management method for a vehicle as described above. According to one aspect of the embodiments of this application, a computer program product is provided, the computer program product including a computer program, the computer program being read and executed by a processor of an electronic device, causing the electronic device to perform the low-voltage system power supply management method for a vehicle as described above.
[0013] The beneficial effects of this application are as follows: This application innovatively constructs a low-voltage management system for vehicles, which consists of a first relay, a second relay, a main power supply, a battery, a supercapacitor, a load unit, and a control unit. The control unit is mainly used for signal transmission and reception and function control. Based on the vehicle's bus network status, combined with the battery's energy status and the supercapacitor's energy status, the opening and closing states of the first relay and the second relay are comprehensively determined. Based on this, the opening and closing states of the first relay and the second relay can be flexibly determined to adjust the low-voltage power supply mode of the load unit, thereby adjusting different power supply modes for different states. Overall, this can greatly reduce the energy consumption of the low-voltage management system. Attached Figure Description
[0014] Figure 1 This is a system architecture diagram of the low-voltage system power supply management method for vehicles provided in this application embodiment; Figure 2 A flowchart illustrating the low-voltage system power supply management method for a vehicle provided in this application embodiment; Figure 3 An architecture diagram of a low-pressure management system for a vehicle provided in an embodiment of this application; Figure 4 A block diagram of a low-voltage system power supply management device for a vehicle provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a server provided in an embodiment of this application. Detailed Implementation
[0015] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0016] It should be noted that while some processes described in the specification, claims, and accompanying drawings include multiple steps appearing in a specific order, it should be clearly understood that these steps may not be performed in the order they appear herein, or may be performed in parallel. The step numbers are merely used to distinguish different steps and do not themselves represent any execution order. Furthermore, descriptions such as "first," "second," or "objective" in this document are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. "Multiple" in this document refers to at least two.
[0017] It is worth noting that, in the specific embodiments of this application, data related to the vehicle's bus network status, battery power status, and supercapacitor power status are involved. When the above embodiments of this application are applied to specific products or technologies, permission or consent from the target entity is required, and the collection, use, and processing of related data must comply with relevant laws, regulations, and standards. For example, when this application requires obtaining data related to the vehicle's bus network status, battery power status, and supercapacitor power status, separate permission or consent from the target entity can be obtained through pop-up windows or redirection to a confirmation page. After obtaining the target entity's separate permission or consent, the relevant data such as the vehicle's bus network status, battery power status, and supercapacitor power status required for the normal operation of this application's embodiments can then be obtained.
[0018] Please see Figure 1 , Figure 1 This is a system architecture diagram of the low-voltage system power supply management method for vehicles provided in this application embodiment. It includes a terminal 140, an Internet connection 130, a gateway 120, a server 110, etc.
[0019] Terminal 140 can take various forms, including desktop computers, laptops, PDAs (personal digital assistants), mobile phones, vehicle terminals, and dedicated terminals. Furthermore, it can be a single device or a collection of multiple devices. For example, multiple desktop computers can be interconnected via a local area network, sharing a single monitor to work collaboratively, forming a single terminal 140. Terminal 140 can communicate with the Internet 130 via wired or wireless means to exchange data.
[0020] Server 110 refers to a computer system capable of providing certain services to terminal 140. Compared to ordinary terminal 140, server 110 has higher requirements in terms of stability, security, and performance. Server 110 can be a single high-performance computer in a network platform, a cluster of multiple high-performance computers, a portion of a single high-performance computer (e.g., a virtual machine), or a combination of portions of multiple high-performance computers (e.g., virtual machines). Server 110 can also communicate with the Internet 130 via wired or wireless means to exchange data.
[0021] Gateway 120, also known as an internetwork connector or protocol converter, is a computer system or device that acts as a translator, enabling network interconnection at the transport layer. It bridges the gap between two systems using different communication protocols, data formats, languages, or even completely different architectures. Gateways can also provide filtering and security functions. Messages sent from terminal 140 to server 110 are forwarded to the corresponding server 110 via gateway 120. Messages sent from server 110 to terminal 140 are also forwarded to the corresponding terminal 140 via gateway 120.
[0022] The following provides a detailed description of the specific implementation methods of the embodiments of this application: Please see Figure 2 , Figure 2 This is a flowchart illustrating the low-voltage system power supply management method for a vehicle provided in this application embodiment. The low-voltage system power supply management method for a vehicle can be implemented by server 110 and / or terminal 140. Figure 2 The low-voltage system power supply management method for the vehicle shown includes: Step 210: Obtain the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status; Step 220: Determine the opening and closing states of the first relay and the second relay based on the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status. When the first relay is in the off state and the second relay is in the off state, the battery supplies power to the load unit; When the first relay is in the open state and the second relay is in the closed state, the supercapacitor supplies power to the load unit. When the first relay is in the closed state and the second relay is in the open state, the battery and the main power supply provide power to the load unit; When the first relay is closed and the second relay is closed, the main power supply, the supercapacitor, and the battery together provide low-voltage power to the load unit.
[0023] The complete embodiments of this application are explained in detail below: In step 210, the vehicle's bus network status includes a wake-up state and a sleep state, the battery's energy status includes various states, such as a fault state with no voltage output, a fault state with too low voltage output, a low-charge state, etc., and the supercapacitor's energy status also includes, for example, a fault state with no voltage output, a fault state with too low voltage output, a low-charge state, etc.
[0024] In step 220, the opening and closing states of the first relay and the second relay are determined comprehensively based on the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status. Based on this, the opening and closing states of the first relay and the second relay can be flexibly determined to adjust the low-voltage power supply mode of the load unit. In this way, different power supply modes can be adjusted for different states, which can greatly reduce the energy consumption of the low-voltage management system.
[0025] First, the control unit room described in this application is used for signal transmission and reception and function control, for example... Figure 3 The gateway in the application can serve as the control unit proposed in this application, as detailed below. Figure 3 Further explanation of the embodiments of this application: Figure 3 S1 in this application refers to the first relay, and the main power supply is also known as... Figure 3 The high-voltage power supply network in the middle, the load unit is Figure 3 The system consists of redundant backup load 1, redundant backup load 2, driving safety load, autonomous driving load, and a collection of general loads.
[0026] The control strategy of the low-voltage management system mainly consists of three parts: relay control strategy, DC-DC generator control strategy, and load power consumption reduction control strategy. These are described in detail below: 1. Relay control strategy 1) The vehicle bus network is in the wake-up state, there is no abnormal fault in the vehicle power grid, and during normal vehicle use, S1 and S2 are closed, the whole vehicle forms a unified low-voltage power grid, and the supercapacitor and battery dual power supply are connected to the vehicle's low-voltage management system. 2) After the vehicle is normally turned off and the whole vehicle is in sleep mode (the vehicle bus network status is sleep mode), S2 is open and S1 is closed. The lead-acid battery provides the dark current consumption of the whole vehicle and supplies power to the load unit. 3) During the normal vehicle shutdown and vehicle hibernation period (the vehicle bus network status is hibernation state), the gateway wakes up the LIN bus every 5 hours to check the power status of the battery and supercapacitor. If a low power status is found, the vehicle is woken up and S1 and S2 are closed to replenish power. 4) When a short circuit occurs in the lead-acid battery while driving, S1 is disconnected and S2 is closed. The supercapacitor serves as the system power source, and the DC-DC converter provides the power input for the entire vehicle, ensuring that the driver can take over the vehicle and make emergency decisions. 5) When a short circuit fault occurs in the supercapacitor while driving, S2 is disconnected and S1 is closed. The lead-acid battery serves as the system power source, and the DC-DC converter provides the power input for the entire vehicle to ensure that the driver can take over the vehicle and make emergency decisions. 6) When the DC-DC output fails while driving, S1 and S2 are both disconnected. At this time, there is no external power source and the capacitor has less energy stored. In order to maintain the state of the capacitor, the battery is the power source to supply power to the vehicle's low-voltage management system, so as to ensure that the driver can take over the vehicle and make emergency decisions. 7) When the DC-DC output fails while driving and the supercapacitor short-circuit, S1 / S2 will disconnect. At this time, the battery will become the power source and supply power to the power network to ensure that the driver can take over the vehicle and take emergency measures. 8) When the DC-DC output fails while driving and the lead-acid battery experiences a short circuit, S1 opens and S2 closes. At this time, there is no external power source, and the supercapacitor provides power to the redundant power loads related to driving safety and autonomous driving, so as to ensure that the driver can take over the vehicle and make emergency decisions. 9) When a load unit of the vehicle fails or a short circuit occurs in the wiring (including ordinary loads, driving safety loads, autonomous driving loads, and redundant backup loads), S1 is opened and S2 is closed. At this time, the battery network and the supercapacitor network form two independent low-voltage power network systems (red network and green network in the figure above). If the red network fails, the supercapacitor serves as the system power source, and the DC-DC converter supplies power to the redundant power loads related to driving safety and autonomous driving. If the green network fails, the battery serves as the system power source and supplies power to the power network to ensure that the driver can take over the vehicle and make emergency decisions.
[0027] 2. DC-DC power generation control strategy 1) When the vehicle's bus network is in the wake-up state, under the IG On (vehicle in the unlocked high voltage state) state, in order to maintain the low voltage management system state of the whole vehicle, the DC-DC continuously outputs to power the low voltage management system. The output voltage is determined by the battery status and ambient temperature. When the battery SOC>90% and the ambient temperature is greater than 0 degrees Celsius, the DC-DC output voltage decreases to reduce the low voltage load power consumption of the whole vehicle. 2) When the vehicle's bus network is in the wake-up state, under the IG On state, when the vehicle enters the low-power load mode, the output voltage of the DC-DC converter is reduced (that is, the input voltage of the main power supply is reduced) to reduce the low-voltage load power consumption of the whole vehicle. 3) The vehicle's bus network is in a wake-up state. When the charging gun is plugged in, the DC-DC converter continuously outputs power to the low-voltage management system. The output voltage is determined by the battery status and the ambient temperature. 4) When the vehicle's bus network is in a wake-up state and IG Off (vehicle is locked), to reduce excess power consumption, the vehicle's high voltage is reduced, and the DC-DC converter output is turned off. At this time, the vehicle load is powered by the battery, and the battery status is monitored in real time. If there is a risk of battery depletion, the instrument panel will alert the user. If the user does not respond, the vehicle will automatically send a charging request after a period of time, the vehicle will return to high voltage, and the DC-DC converter output will power the low-voltage system. The prerequisites for automatic charging are: the battery sensor has completed self-learning, the battery level is accurately read, and the vehicle's hood is closed (maintenance safety is considered after the vehicle returns to high voltage). The conditions for automatic charging to exit are: the battery level reaches a limit, the charging duration reaches a limit, the hood is open, or there is a higher priority request to return to high voltage via DC-DC converter output, such as IG On or plug-in charging. 5) After the vehicle's bus network enters sleep mode, to reduce the vehicle's dark current consumption, the gateway only wakes up the LIN bus every 5 hours to check the status of the battery and supercapacitor. If neither is depleted, the vehicle continues to remain in sleep mode. If the supercapacitor is depleted, the vehicle is woken up, the relay is closed, and the supercapacitor is recharged through the battery. If the battery is depleted, the vehicle is woken up, the relay is closed, a recharge request is sent, the vehicle connects to high voltage, and the DC-DC output recharges the battery, following the same process as in c). The aforementioned power replenishment strategy fully considers the energy consumption reduction requirements of the vehicle under low-voltage loads. In addition, combined with the development of active power replenishment function, the capacity requirements of the battery can be appropriately reduced, further reducing weight and cost.
[0028] 3. Load power consumption reduction control strategy This section mainly explains the conditions that must be met for a vehicle to enter low-power consumption mode: 1) The driver can actively select and enter this mode by using the driving mode selection switch. The driver can also enter this low power consumption mode by sending an active command from the vehicle.
[0029] 2) This feature automatically activates when the vehicle's battery charge falls below a set threshold (preset charge threshold). The default preset charge threshold is 10%, but users can adjust it between 5% and 20% according to their personal usage habits.
[0030] 3) Based on the user's navigation settings, the system will automatically enter the navigation mode when the vehicle's remaining driving range is lower than the distance between the vehicle and the destination (preset mileage).
[0031] 4) Automatically enters the vehicle on-board DC-DC fault (interrupted output), that is, when the main power supply experiences an interruption in output power.
[0032] When a vehicle enters this mode, either the driver subjectively chooses to prioritize ensuring the vehicle's driving range, or the vehicle's objective operating conditions dictate that prioritizing the vehicle's driving range is necessary. In this case, it is essential to sacrifice some driving comfort and entertainment to minimize the vehicle's power consumption and further increase the driving range, while ensuring basic driving operations and driving safety.
[0033] The main implementation logic of the low-voltage management system is as follows: A DC-DC converter transforms high-voltage electrical energy from the vehicle's power battery pack (mainline power network) into low-voltage electrical energy, supplying power to the vehicle's low-voltage load units and charging the battery and supercapacitor. Its output and voltage level can be controlled via bus communication signals. A small-capacity lead-acid battery and battery sensor are also included. The battery sensor monitors battery status parameters such as voltage, current, state of charge (SOC), temperature, health, and aging. A supercapacitor (with an internal integrated controller) monitors its status parameters, including voltage, temperature, and internal balance. Compared to batteries or other energy storage components, supercapacitors have significant advantages in several aspects, including high safety, high power, long lifespan, lightweight design, high environmental adaptability, and high charging efficiency, except for lower energy density and self-discharge performance. Furthermore, its terminal voltage directly reflects its residual charge, and its internal resistance remains largely unchanged with the depth of discharge, which is beneficial for control system development. Therefore, it is selected as a redundant backup power source in this architecture. Two relays are used to form a low-voltage power network. One power source consists of the vehicle's conventional loads, one source of redundant power supply for autonomous driving / driving safety-related loads, one of the redundant backup loads, and a lead-acid battery. The other power source consists of the redundant power supply for autonomous driving / driving safety-related loads, the other redundant backup load, and a supercapacitor. The supercapacitor can be isolated from this power network via a second relay S2. The two power networks are connected or disconnected via a first relay S1. The vehicle's low-voltage power management system software is integrated into the gateway. It interacts with the battery sensors and supercapacitor via the LIN bus to obtain battery and supercapacitor status information, and interacts with the DC-DC converter via the CAN bus to control the DC-DC output voltage.
[0034] In summary, this application can adjust the low-voltage power supply mode of the load unit by flexibly determining the opening and closing states of the first and second relays, thereby adjusting different power supply modes for different states. Overall, this can greatly reduce the energy consumption of the low-voltage management system.
[0035] Please see Figure 4 , Figure 4This is a schematic diagram of the structure of a low-voltage system power supply management device for a vehicle provided in an embodiment of this application. The low-voltage system power supply management device is applied to computer equipment, and may include: The acquisition unit 401 is used to acquire the bus network status of the vehicle, the power status of the battery, and the power status of the supercapacitor. The determining unit 402 is used to determine the opening and closing states of the first relay and the second relay based on the bus network status of the vehicle, the power status of the battery and the power status of the supercapacitor. When the first relay is in the off state and the second relay is in the off state, the battery supplies power to the load unit; When the first relay is in the open state and the second relay is in the closed state, the supercapacitor supplies power to the load unit. When the first relay is in the closed state and the second relay is in the open state, the battery and the main power supply provide power to the load unit; When the first relay is closed and the second relay is closed, the main power supply, the supercapacitor, and the battery together provide low-voltage power to the load unit.
[0036] Reference Figure 5 , Figure 5 To implement the structural block diagram of a portion of the terminal 140 in this application embodiment, the terminal 140 includes: a radio frequency (RF) circuit 710, a memory 715, an input unit 730, a display unit 740, a sensor 750, an audio circuit 760, a wireless fidelity (WiFi) module 770, a processor 780, and a power supply 790, among other components. Those skilled in the art will understand that... Figure 5 The terminal 140 structure shown does not constitute a limitation on a mobile phone or computer, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.
[0037] The RF circuit 710 can be used to receive and transmit signals during information transmission or calls. In particular, it receives downlink information from the base station and processes it with the processor 780; in addition, it transmits uplink data to the base station.
[0038] The memory 715 can be used to store software programs and modules. The processor 780 executes various functional applications of the terminal and low-voltage system power supply management processing of the vehicle by running the software programs and modules stored in the memory 715.
[0039] The input unit 730 can be used to receive input numeric or character information, and to generate key signal inputs related to the terminal's settings and function control. Specifically, the input unit 730 may include a touch panel 731 and other input devices 732.
[0040] The display unit 740 can be used to display input or provided information, as well as various menus of the terminal. The display unit 740 may include a display panel 741.
[0041] Audio circuitry 760, speaker 761, and microphone 762 provide an audio interface.
[0042] In this embodiment, the processor 780 included in the terminal 140 can execute the low-voltage system power supply management method for vehicles described in the previous embodiment.
[0043] The terminal 140 in this application embodiment includes, but is not limited to, mobile phones, computers, intelligent voice interaction devices, smart home appliances, vehicle terminals, and aircraft. This application embodiment can be applied to various scenarios, including but not limited to cloud technology, artificial intelligence, smart transportation, and assisted driving.
[0044] Figure 6 This is a partial structural block diagram of a server 110 implementing an embodiment of this application. The server 110 can vary significantly due to different configurations or performance characteristics, and may include one or more central processing units (CPUs) 822 (e.g., one or more processors) and memory 832, and one or more storage media 830 (e.g., one or more mass storage devices) for storing application programs 842 or data 844. The memory 832 and storage media 830 can be temporary or persistent storage. The program stored in the storage media 830 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the server 110. Furthermore, the CPU 822 may be configured to communicate with the storage media 830 and execute the series of instruction operations in the storage media 830 on the server 110.
[0045] Server 110 may also include one or more power supplies 826, one or more wired or wireless network interfaces 850, one or more input / output interfaces 858, and / or one or more operating systems 841, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, etc.
[0046] The central processing unit 822 in server 110 can be used to execute the low-voltage system power supply management method for vehicles according to embodiments of this application.
[0047] This application also provides a computer-readable storage medium for storing program code for executing the low-voltage system power supply management method for vehicles in the foregoing embodiments.
[0048] This application also provides a computer program product, which includes a computer program. A processor of a computer device reads and executes the computer program, causing the computer device to perform the aforementioned low-voltage system power supply management method for a vehicle.
[0049] Furthermore, the terms “comprising” and “including”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.
[0050] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0051] It should be understood that in the description of the embodiments of this application, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.
[0052] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.
[0053] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application, depending on actual needs.
[0054] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0055] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution 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.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0056] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.
[0057] In the embodiments of this application, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.
[0058] The above is a detailed description of the embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A low-voltage system power supply management method for a vehicle, characterized by, A low-voltage management system for vehicles, comprising a first relay, a second relay, a main power supply, a battery, a supercapacitor, a load unit, and a control unit, wherein the method is executed in the control unit, and the method includes: The vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status are obtained. The opening and closing states of the first relay and the second relay are determined based on the bus network status of the vehicle, the energy status of the battery, and the energy status of the supercapacitor. When the first relay is in the off state and the second relay is in the off state, the battery supplies power to the load unit; The first relay is in the open state and the second relay is in the closed state, and the supercapacitor supplies power to the load unit; When the first relay is in the closed state and the second relay is in the open state, the battery and the main power supply provide power to the load unit; When the first relay is closed and the second relay is closed, the main power supply, the supercapacitor, and the battery together provide low-voltage power to the load unit.
2. The low voltage system power supply management method of a vehicle according to claim 1, characterized by, Determining the opening / closing state of the first relay and the second relay based on the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status includes: If the vehicle's bus network is in a wake-up state, and the battery's power status is fault-free and the supercapacitor's power status is fault-free, then the first relay's open / closed state is determined to be closed, and the second relay's open / closed state is determined to be closed. If the vehicle's bus network is in a dormant state, then the first relay is determined to be closed, and the second relay is determined to be open.
3. The low voltage system power supply management method of a vehicle according to claim 2, characterized by, The step of determining the opening / closing state of the first relay and the second relay based on the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status further includes: If the battery's electrical state is a short circuit fault, then the first relay's open / closed state is determined to be open, and the second relay's open / closed state is determined to be closed. If the supercapacitor's electrical state is a short-circuit fault, then the first relay's open / closed state is determined to be closed, and the second relay's open / closed state is determined to be open. If the battery is in a depleted state and / or the supercapacitor is in a depleted state, then the first relay is determined to be in a closed state, and the second relay is determined to be in a closed state.
4. The low voltage system power supply management method of a vehicle according to claim 1, characterized by, The method further includes: If the main power supply experiences a line fault with no power output, then the opening and closing state of the first relay is determined to be the open state, and the opening and closing state of the second relay is determined to be the open state. If a short circuit fault occurs in the load unit, the first relay is determined to be in the open state, and the second relay is determined to be in the closed state.
5. The low voltage system power supply management method of a vehicle according to claim 1, characterized by, The method further includes: If the vehicle's bus network is in a wake-up state and the vehicle is in an unlocked high-voltage state, the output voltage of the main power supply is determined based on the battery's energy state and the ambient temperature of the vehicle. If the vehicle's bus network is in a wake-up state and the vehicle enters a low-power load mode, the output voltage of the main power supply will be reduced to a preset output voltage.
6. The low voltage system power supply management method of a vehicle according to claim 5, characterized by, The conditions for the vehicle to enter the low-power consumption mode include: If an active command for entering the low-power load mode is received from the vehicle, it is determined that the vehicle meets the conditions for entering the low-power load mode. If the power battery charge of the vehicle is lower than a preset charge threshold, then the vehicle is determined to meet the conditions for entering the low power consumption mode. If the vehicle's remaining driving range is lower than the preset range, then the vehicle is determined to meet the conditions for entering the low-power consumption mode. If the main power supply experiences an interruption in output power, then the vehicle is determined to meet the conditions for entering the low power consumption mode.
7. The low voltage system power supply management method of a vehicle according to claim 1, characterized by, The method further includes: If the vehicle's bus network is in a dormant state and the vehicle is locked, then the output of the main power supply is stopped so that the battery can supply power to the load unit; If the battery is in a depleted state, it will be recharged by the main power supply.
8. A low-voltage system power supply management device of a vehicle, characterized by comprising: A low-voltage management system for vehicles, comprising a first relay, a second relay, a main power supply, a battery, a supercapacitor, a load unit, and a control unit, wherein the device includes: The acquisition unit is used to acquire the vehicle's bus network status, the battery's energy status, and the supercapacitor's energy status. The determining unit is used to determine the opening and closing states of the first relay and the second relay based on the bus network status of the vehicle, the energy status of the battery and the energy status of the supercapacitor. When the first relay is in the off state and the second relay is in the off state, the battery supplies power to the load unit; The first relay is in the open state and the second relay is in the closed state, and the supercapacitor supplies power to the load unit; When the first relay is in the closed state and the second relay is in the open state, the battery and the main power supply provide power to the load unit; When the first relay is closed and the second relay is closed, the main power supply, the supercapacitor, and the battery together provide low-voltage power to the load unit.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the low-voltage system power supply management method for the vehicle as described in any one of claims 1 to 7.
10. A computer program product, the computer program product comprising a computer program, characterized in that, The computer program is read and executed by the processor of the electronic device, causing the electronic device to perform the low-voltage system power supply management method for a vehicle as described in any one of claims 1 to 7.