Power supply control method for vehicle, vehicle, and electronic device

Abstract

The application relates to a power supply method of a vehicle, the vehicle and an electronic device, and belongs to the technical field of power batteries, and comprises the following steps: in response to the vehicle entering a parking state, the power generation power of a solar power supply module and the power of a whole vehicle load are acquired; when the power generation power is lower than a preset working threshold, a high-voltage battery pack is controlled to supply power to the whole vehicle load; when the power generation power is not lower than the preset working threshold, according to a comparison result of the power generation power and the power of the whole vehicle load, the solar power supply module is controlled to supply power or the solar power supply module and a low-voltage storage battery are controlled to supply power jointly; when the solar power supply module and the low-voltage storage battery supply power jointly, the discharge current of the low-voltage storage battery is acquired, and when the discharge current is greater than a preset current threshold, the high-voltage battery pack and the solar power supply module are controlled to supply power to the whole vehicle load jointly. Through the above power supply method, the energy utilization rate is improved, and meanwhile, the power supply reliability of the vehicle is ensured.

Description

Technical Field

[0001] This application relates to the technical field of power batteries, and more particularly to a power supply control method for a vehicle, a vehicle, and electronic equipment. Background Technology

[0002] With the development of new energy vehicles and intelligent connected vehicle technologies, vehicle parking functions are becoming increasingly sophisticated, such as sentry mode, parking air conditioning, and parking refrigerators. These functions need to continue operating even when the vehicle is powered off, placing a continuous power supply requirement on the vehicle's low-voltage power supply system.

[0003] In existing technologies, the power supply scheme for parking functions uses a high-voltage battery pack to continuously power the low-voltage system to avoid low-voltage battery depletion. This leads to excessive consumption of the high-voltage battery pack's charge, affecting the vehicle's range after starting. Although some solutions incorporate solar panels as supplementary energy, these are typically only simply connected in parallel or used for auxiliary charging, resulting in low clean energy utilization and still making frequent reliance on the high-voltage battery pack difficult to avoid. Therefore, existing technologies cannot achieve a balance between energy efficiency and maintaining vehicle range. Summary of the Invention

[0004] This application at least partially solves the technical problem in related technologies where energy efficiency and vehicle range cannot be balanced when power is supplied while the vehicle is parked.

[0005] Therefore, this application aims to provide a power supply control method for a vehicle, a vehicle, and electronic equipment.

[0006] To achieve the above objectives, in a first aspect, this application provides a power supply method for a vehicle, applicable to a vehicle having a solar power module, a low-voltage battery, and a high-voltage battery pack, the power supply method comprising: In response to the vehicle entering the parking state, the power generation of the solar power module and the power of the vehicle load are obtained; When the power generation is lower than the preset operating threshold, the high-voltage battery pack is controlled to supply power to the vehicle load. When the power generation is not lower than the preset working threshold, the solar power supply module is controlled to supply power or the solar power supply module and the low-voltage battery are controlled to supply power together, based on the comparison result between the power generation and the power of the vehicle load. When the solar power module and the low-voltage battery work together to supply power, the discharge current of the low-voltage battery is obtained, and when the discharge current is greater than a preset current threshold, the high-voltage battery pack and the solar power module are controlled to work together to supply power to the vehicle load.

[0007] In this technical solution, the present application obtains the solar power generation power and the vehicle load power. Based on the comparison results of the solar power with the preset operating threshold and load power, it prioritizes controlling the independent power supply of solar energy or the power supply in conjunction with the low-voltage battery. It also monitors the discharge current of the low-voltage battery in real time, and only activates the high-voltage battery pack to provide power when the discharge current is too high. Thus, this application achieves a three-level progressive power supply management system: clean energy priority, low-voltage buffer, and high-voltage backup. This maximizes the use of solar energy to save high-voltage battery pack power, while avoiding excessive discharge of the low-voltage battery leading to power depletion. This ensures the continuity and reliability of power supply for the parking function, improving the balance between energy utilization efficiency and vehicle range maintenance.

[0008] In some embodiments of this application, controlling the solar power module to supply power or the solar power module and the low-voltage battery to supply power together based on the comparison result of the power generation power and the power of the vehicle load includes: When the power generation is not lower than the power of the vehicle load, the solar power module is controlled to supply power to the vehicle load separately. When the power generation is lower than the power of the vehicle load, the solar power module and the low-voltage battery are controlled to jointly supply power to the vehicle load.

[0009] In this technical solution, the precise selection of the power supply mode is achieved by monitoring the relationship between the solar power generation and the vehicle load power. When the solar power is sufficient, it is controlled to supply power to the load solely, avoiding the consumption of the low-voltage battery and thus extending its lifespan. When the solar power is insufficient, it is promptly activated to supply power to both the solar power and the low-voltage battery, ensuring uninterrupted power supply to the load. Therefore, this application, while prioritizing the use of clean energy, dynamically matches the power supply mode according to power output, improving energy efficiency and avoiding unnecessary discharge of the low-voltage battery, further enhancing the reliability and energy-saving effect of the parking power supply system.

[0010] In some embodiments of this application, it further includes: The power level of the low-voltage battery is obtained. When the power level is lower than a first power threshold, the high-voltage battery pack is given priority to supply power to the vehicle load, and at the same time, the high-voltage battery pack charges the low-voltage battery.

[0011] In this technical solution, by monitoring the low-voltage battery's charge level, when the charge level falls below a first threshold, the high-voltage battery pack is prioritized to supply power to the vehicle load while simultaneously charging the low-voltage battery. Therefore, this application intervenes promptly when the low-voltage battery charge is too low, forcing the high-voltage battery pack to assume the power supply task and actively replenishing the low-voltage charge. This avoids the risk of the vehicle failing to start due to the low-voltage battery running out of power, achieving over-discharge protection for the low-voltage battery and further improving the reliability and safety of the parking power supply system. Simultaneously, this charging process does not affect the continuous power supply to the vehicle load, ensuring the normal operation of the parking function.

[0012] In some embodiments of this application, it further includes: During the period when the high-voltage battery pack supplies power to the vehicle load and simultaneously charges the low-voltage battery, when the charge of the low-voltage battery recovers to a level higher than the second charge threshold, the charging of the high-voltage battery pack is stopped, and the power supply is restored to either solely powered by the solar power module or jointly powered by the solar power module and the low-voltage battery, based on the comparison between the power generation of the solar power module and the power of the vehicle load.

[0013] In this technical solution, the low-voltage battery charge is continuously monitored during forced charging, and charging of the high-voltage battery pack is stopped promptly when the charge recovers to above a second charge threshold. This avoids damage to the low-voltage battery from overcharging and extends its lifespan. Simultaneously, based on a comparison of the current solar power generation capacity and the vehicle's load power, this application intelligently reverts to either solar power alone or a combined solar and low-voltage battery power supply mode. This achieves a smooth switching of power supply modes, minimizing the high-voltage battery pack's usage time, further conserving its power, and optimizing the vehicle's energy management.

[0014] In some embodiments of this application, it further includes: In response to the vehicle exiting the parking state, the power level of the low-voltage battery is obtained; If the power level is lower than the second power threshold, the solar power module will charge the low-voltage battery until the preset charging stop condition is met. If the battery level is not lower than the second battery level threshold, the vehicle is controlled to enter a sleep state.

[0015] In this technical solution, after the vehicle exits the parking state, the remaining charge of the low-voltage battery is detected to determine subsequent operations. If the charge is below a second threshold, the solar power module charges the battery until preset conditions are met, thus fully utilizing solar energy to replenish the charge and preventing the low-voltage battery from remaining in a low-charge state for extended periods, extending battery life and ensuring reliable vehicle starting next time. If the charge has reached the threshold, the vehicle is directly put into a sleep state, reducing unnecessary energy consumption. This solution achieves seamless and automated power replenishment management after the parking function is exited, balancing the health maintenance of the low-voltage battery with the optimization of the vehicle's static power consumption.

[0016] In some embodiments of this application, both the solar power module and the high-voltage battery pack supply power to the vehicle load and / or charge the low-voltage battery via a DC-DC converter.

[0017] In this technical solution, by using a DC-DC converter to power both the solar power module and the high-voltage battery pack to supply power to the vehicle load and / or charge the low-voltage battery, unified management of power access and centralized control of voltage conversion are achieved. On one hand, the DC-DC converter, as a shared voltage regulation interface, can convert electrical energy from different power sources into voltage levels suitable for the vehicle load and the low-voltage battery, avoiding the need for separate conversion circuits for each power source, simplifying the vehicle's electrical architecture, and reducing hardware costs and space requirements. On the other hand, the DC-DC converter can flexibly switch input sources and adjust outputs under controller commands, providing reliable hardware support for a progressive power supply strategy of solar priority, low-voltage supplementation, and high-voltage backup, improving the integration of energy dispatch and system reliability.

[0018] In a second aspect, this application provides a vehicle for implementing a power supply method for the vehicle as described in the first aspect, comprising: The controller is electrically connected to the solar power module, the low-voltage battery, the high-voltage battery pack and the vehicle load respectively. The controller is configured to acquire the power generation of the solar power module, the charge and discharge current of the low-voltage battery and the power of the vehicle load, and generate control commands based on the acquired signals to control the power supply switching between the solar power module, the low-voltage battery and the high-voltage battery pack. A DC-DC converter is electrically connected to the solar power module, the low-voltage battery, the high-voltage battery pack, and the vehicle load, respectively. It is used to receive control commands from the controller and convert the electrical energy of the solar power module, the low-voltage battery, or the high-voltage battery pack into voltages according to the control commands, so as to output a voltage adapted to the vehicle load and / or the low-voltage battery. A solar power module is electrically connected to the vehicle load and / or the low-voltage battery via the DC-DC converter. A high-voltage battery pack, which is electrically connected to the vehicle load and / or the low-voltage battery via the DC-DC converter; A low-voltage battery is electrically connected to the vehicle load via the DC-DC converter.

[0019] In this technical solution, a unified power dispatching architecture is constructed by setting up a controller and a DC-DC converter, and electrically connecting the solar power module, low-voltage battery, high-voltage battery pack, and vehicle load to the DC-DC converter. The controller acquires the status information of each component and generates control commands. The DC-DC converter converts the input electrical energy according to the commands and outputs it to the vehicle load and / or low-voltage battery. Therefore, the vehicle can flexibly select from multiple modes, such as solar power alone, solar power and low-voltage battery power combined, or high-voltage battery pack power supply. This achieves a three-level progressive power supply management system: clean energy priority, low-voltage buffer, and high-voltage backup. This effectively avoids low-voltage battery depletion, maximizes the conservation of high-voltage battery pack power, and improves the reliability, energy efficiency, and range maintenance capability of the parking function power supply. Simultaneously, the DC-DC converter, as a centralized voltage conversion node, simplifies electrical connections and reduces system costs.

[0020] In some embodiments of this application, the DC-DC converter is provided with a switching circuit, and the controller controls the switching circuit to switch on and off through the control command, so as to control the power supply switching between the solar power module, the low-voltage battery and the high-voltage battery pack.

[0021] In this technical solution, a switching circuit is set inside the DC-DC converter, and its on / off state is directly controlled by the controller, eliminating the need for additional switching devices, thus reducing costs and wiring complexity. At the same time, the power supply mode can be flexibly switched according to the real-time status, quickly responding to changes in light and load, ensuring reliable execution of the power supply strategy, and improving response speed and integration.

[0022] In some embodiments of this application, it further includes: A battery sensor, electrically connected to the low-voltage battery and the controller, is used to detect the charge and discharge current of the low-voltage battery and transmit the charge and discharge current of the low-voltage battery to the controller.

[0023] In the technical solution, the battery sensor detects the charge and discharge current of the low-voltage battery in real time and transmits the data to the controller. This enables the controller to accurately determine when to force charging or intervene with high voltage, thereby achieving refined monitoring and over-discharge protection of the battery, ensuring the reliable execution of the power supply strategy, improving system reliability, and extending battery life.

[0024] In a third aspect, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the power supply method for a vehicle as described in the first aspect.

[0025] As can be seen from the above technical solutions, additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the power supply method for a vehicle according to an embodiment of this application; Figure 2 This is a schematic flowchart of a vehicle power supply method according to an embodiment of this application; Figure 3 This is a schematic diagram of a low-voltage battery power management process according to an embodiment of this application; Figure 4 This is a schematic diagram of the power replenishment management process after exiting the parking state according to the embodiments of this application; Figure 5 A schematic diagram of a computer device according to an embodiment of this application.

[0027] In the above figures: 40. Bus; 41. Processor; 42. Memory; 43. Communication interface. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0029] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0030] In this application, the reference to "embodiment" means that a specific 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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0031] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0032] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments. It should be noted that in the automotive industry, with the improvement of vehicle intelligence, parking functions are becoming increasingly sophisticated, such as sentry mode, parking air conditioning, parking refrigerator, and parking charging. These functions need to continue operating even when the vehicle's ignition switch is off, i.e., after the vehicle's power is turned off, placing long-term and stable power supply demands on the vehicle's low-voltage power supply system.

[0033] In existing technologies, relying solely on low-voltage batteries for power can easily lead to battery depletion during prolonged operation, preventing the vehicle from starting and even shortening battery life. While using a high-voltage battery pack to continuously power the low-voltage system can avoid low-voltage depletion, it continuously consumes the high-voltage battery pack's charge, significantly impacting the vehicle's range after startup. This is especially true in long-term parking scenarios, such as parking for several days or weeks, where the high-voltage battery pack's charge loss can reach several percentage points, severely limiting the vehicle's usable driving range.

[0034] To address the parking power supply issue, some solutions attempt to incorporate solar panels as supplementary energy. However, these solutions typically only connect solar panels in parallel with low-voltage batteries or use them as auxiliary charging devices, lacking intelligent and refined energy scheduling and management for different lighting conditions and battery states. The inability to achieve smooth switching and power distribution between solar energy, low-voltage batteries, and high-voltage battery packs forces the system to frequently rely on the high-voltage battery pack for power supply, resulting in excessive consumption of its power. Therefore, existing technologies struggle to balance clean energy efficiency with vehicle range maintenance while ensuring reliable power supply for parking functions, necessitating a more intelligent and efficient parking power supply management solution.

[0035] Based on this, this application proposes a power supply method for a vehicle, a vehicle, and electronic equipment. By acquiring the solar power generation power and the vehicle load power in real time, when solar energy is available, the system prioritizes the independent power supply of solar energy or its coordinated power supply with the low-voltage battery based on the power comparison results. When the discharge current of the low-voltage battery is too large, the high-voltage battery pack is activated to provide power together. This achieves a three-level progressive power supply management system of prioritizing clean energy, buffering low voltage, and providing high-voltage backup. It effectively saves the power of the high-voltage battery pack and avoids the low-voltage battery from running out of power, solving the problem of balancing energy utilization efficiency and vehicle range in the prior art.

[0036] First, let's define the parking status. In this application, parking status refers to a vehicle being stationary and parked with specific parking functions activated by the user, such as Sentry Mode (parking monitoring), parking air conditioning, parking refrigerator, and parking charging.

[0037] When these functions are activated, the vehicle is usually in a power-off state, that is, the ignition switch is in the OFF position, the engine or drive motor does not work, but some low-voltage loads still need to continue to run to perform tasks such as monitoring, temperature regulation or refrigeration.

[0038] The characteristics of the parked state are long power supply duration, dynamic changes in load power, and inability to rely on generators or energy recovery systems during driving for supplemental power. Therefore, it is necessary to rely on on-board energy storage devices and static energy sources such as solar energy for power supply.

[0039] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the overall structure of the power supply method for a vehicle according to an embodiment of this application, as shown below. Figure 1 As shown in an illustrative embodiment of the power supply method, vehicle, and electronic equipment of the vehicle in this application, the vehicle power supply system of this application includes a controller, a solar power module, a low-voltage battery, a high-voltage battery pack, a DC-DC converter, a battery sensor, and a vehicle load.

[0041] The solar power module, high-voltage battery pack, and low-voltage battery are electrically connected to the vehicle load via DC-DC converters. The controller is communicatively connected to the DC-DC converters and each power module to control the power supply switching between each power module and the vehicle load.

[0042] Preferably, the vehicle load refers to the components that require power to perform their functions in the parking mode.

[0043] Specifically, when the user activates Sentinel Mode, the vehicle load includes a camera and related image processing module for monitoring the vehicle's surroundings; when the user activates the parking refrigerator function, the vehicle load includes a compressor and its control circuit for maintaining the refrigeration temperature; and when the user activates the parking air conditioning function, the vehicle load includes a fan, compressor, and damper actuator for regulating the air inside the vehicle.

[0044] In addition, the vehicle load may also include other electrical equipment that needs to operate continuously or intermittently while the vehicle is parked, such as in-vehicle air quality sensors and anti-theft alarm devices. These loads need to continue to supply power after the vehicle is powered off, and their power demand will fluctuate dynamically with changes in operating status, such as the start and stop of the parking air conditioning compressor and the alternate wake-up of multiple cameras in sentry mode. Therefore, high requirements are placed on the response speed, stability and energy dispatching capabilities of the power supply system.

[0045] Preferably, the solar power module is used to convert light energy into electrical energy to supply power to the vehicle load or to charge the low-voltage battery when the vehicle is parked.

[0046] Furthermore, the solar power module includes solar panels and integrates a Maximum Power Point Tracking (MPPT) controller.

[0047] The MPPT controller can monitor the voltage, current, and power output of the solar panels in real time and transmit this status information to the controller via a communication bus. Solar panels are typically installed in the vehicle's sunroof or roof to maximize sunlight exposure. When sunlight is abundant, the solar power module can independently power the entire vehicle load; when sunlight is insufficient, it can serve as an auxiliary energy source, reducing reliance on high-voltage battery packs.

[0048] Preferably, the low-voltage battery can be a 12V battery, typically a 12V lead-acid battery or a 12V lithium battery, used to provide basic power for the low-voltage components of the vehicle. The nominal voltage of the low-voltage battery is 12 volts, and its operating voltage range is generally between 9 volts and 16 volts. The capacity is typically between 40 Ah and 100 Ah, depending on the vehicle model. The low-voltage battery is electrically connected to the vehicle load via a DC-DC converter, and also receives charging energy from the solar power module or high-voltage battery pack via the DC-DC converter.

[0049] In some embodiments, the battery sensor is electrically connected to the low-voltage battery and the controller to detect the charge and discharge current of the low-voltage battery and transmit the charge and discharge current of the low-voltage battery to the controller.

[0050] Furthermore, the positive and negative terminals of the low-voltage battery are connected to an Electronic Battery Sensor (EBS). The battery sensor is used to collect real-time data on the low-voltage battery's charge level, i.e., state of charge (SOC), voltage, discharge current, and other status information, and transmits this information to the controller via a communication bus.

[0051] Furthermore, the aforementioned low-voltage battery and its connected battery sensors can be replaced with a 12V lithium battery and its built-in Battery Management System (BMS). The 12V lithium battery BMS is also used to monitor the battery's state of charge, voltage, charging and discharging current, temperature, and cell balancing in real time, and transmits this status information to the controller via a communication bus.

[0052] Compared with lead-acid batteries, 12V lithium batteries have advantages such as high energy density, long cycle life and low self-discharge rate, but they are more sensitive to overcharging, over-discharging and low temperature, so they require precise management by a BMS.

[0053] In the power supply control method of this application, regardless of whether a combination of 12V lead-acid battery and EBS or a combination of 12V lithium battery and BMS is used, the controller can acquire the corresponding battery status information to achieve a three-level progressive power supply management system of solar priority, low-voltage buffer, and high-voltage backup. When using a 12V lithium battery solution, since lithium batteries typically allow a larger discharge current, the preset current threshold can be increased accordingly, thereby further reducing the frequency of high-voltage battery pack intervention.

[0054] Preferably, the high-voltage battery pack serves as the vehicle's primary energy storage unit, providing driving power to the entire vehicle and, when parked, supplying power to the vehicle's loads and / or charging the low-voltage battery via a DC-DC converter. The high-voltage battery pack typically consists of multiple lithium-ion cells connected in series, with a nominal voltage of 400 volts, 800 volts, or other high-voltage levels depending on the vehicle model, and its capacity designed according to range requirements.

[0055] The high-voltage battery pack integrates a Battery Management System (BMS), which monitors the status of the high-voltage battery pack in real time, including remaining charge, voltage, current, temperature, and cell balance, and transmits the monitored status information to the controller.

[0056] The output of the high-voltage battery pack is connected to the high-voltage input of the DC-DC converter via a high-voltage wiring harness. The DC-DC converter converts its high-voltage electrical energy into a voltage suitable for the vehicle load and the low-voltage battery, thereby enabling the high-voltage battery pack to supply power to the low-voltage system.

[0057] In some embodiments, the controller is electrically connected to the solar power module, the low-voltage battery, the high-voltage battery pack, and the vehicle load, respectively. The controller is configured to acquire the power generation of the solar power module, the charge and discharge current of the low-voltage battery, and the power of the vehicle load, and generate control commands based on the acquired signals to control the power supply switching between the solar power module, the low-voltage battery, and the high-voltage battery pack.

[0058] Preferably, the controller is a Central Electronic Module (CEM), deployed in the central console area or dashboard of the vehicle, serving as the control core for the vehicle's low-voltage electrical system. The controller integrates a microcontroller, memory, digital signal processing unit, and multiple communication transceivers, including controller area network transceivers and local interconnect network transceivers, for data exchange with various subsystems. The controller is powered by a low-voltage battery, converted to the required operating voltage by an internal power management module.

[0059] Preferably, the controller is communicatively connected to the maximum power point tracking controller of the solar power module, the battery sensor, the battery management system of the high-voltage battery pack, the DC-DC converter, and the vehicle load via a controller area network bus or a local interconnection network bus, respectively, to receive status information reported by each module and issue control commands. Simultaneously, the controller is also hardwired to the enable pin and switch control pin of the DC-DC converter to directly drive and control the internal switching circuitry of the DC-DC converter.

[0060] Through the above deployment and connection, the controller can obtain real-time information on solar power generation, low-voltage battery charge and discharge current, high-voltage battery pack status, and vehicle load power. It can also generate precise control commands based on preset logic algorithms to achieve a three-level progressive power supply management system that prioritizes solar power, buffers low-voltage power, and provides high-voltage backup.

[0061] In some embodiments, the DC-DC converter is electrically connected to the solar power module, the low-voltage battery, the high-voltage battery pack, and the vehicle load, respectively, and is used to receive control commands from the controller and convert the electrical energy of the solar power module, the low-voltage battery, or the high-voltage battery pack into voltages according to the control commands, so as to output a voltage adapted to the vehicle load and / or the low-voltage battery.

[0062] Preferably, the DC-DC converter is also called a DC-DC converter (DCDC), which converts the DC voltage received at the input terminal into a DC voltage that is adapted to the load requirements at the output terminal.

[0063] In this application, the DC-DC converter has a voltage reduction function. On the one hand, it reduces the high-voltage DC power provided by the high-voltage battery pack to 12 volts, and on the other hand, it regulates the wide-range DC power provided by the solar power module to 12 volts to match the rated voltage of the vehicle load and the low-voltage battery.

[0064] In some embodiments, the DC-DC converter is provided with a switching circuit, and the controller controls the switching circuit to switch between the solar power module, the low-voltage battery and the high-voltage battery pack by controlling the switching circuit through control commands.

[0065] Preferably, the DC-DC converter includes a power switching transistor, a high-frequency transformer or power inductor, a rectifier and filter circuit, and a pulse width modulation (PWM) control circuit. The PWM control circuit receives a command signal from the controller and controls the stability of the output voltage by adjusting the duty cycle of the power switching transistor.

[0066] Furthermore, the switching circuit inside the DC-DC converter can employ a bidirectional switching array composed of multiple metal-oxide-semiconductor field-effect transistors (MOSFETs), or a combination of relays and MOSFETs. The controller controls the on and off of each switch by outputting a pulse-width modulation (PWM) signal or a high / low level signal.

[0067] For example, when the solar power module needs to supply power independently, the controller turns on the switch connected to the solar input terminal while simultaneously disconnecting the switches connected to the high-voltage battery pack and the low-voltage battery input terminals. When both solar and low-voltage battery power are needed, the controller turns on the switches at both the solar and low-voltage battery input terminals and controls the supplementary current by adjusting the duty cycle of the low-voltage battery side switch, achieving precise power distribution. When the high-voltage battery pack needs to be involved, the controller turns on the switch at the high-voltage input terminal and can selectively turn on other switches simultaneously to achieve shared power supply. This circuit structure based on a switch array enables arc-free switching between multiple power sources, with fast response speed and low conduction loss, which helps improve system efficiency and reliability.

[0068] Furthermore, the low-voltage output terminal of the DC-DC converter is simultaneously connected to the positive bus of the vehicle load and the positive terminal of the low-voltage battery, while its negative terminal is connected to the common ground. The high-voltage input terminal of the DC-DC converter is connected to the output terminal of the high-voltage battery pack, and its low-voltage input terminal is connected to the output terminal of the solar power module. In addition, the DC-DC converter is equipped with a communication interface and hardwired control pins, which interact with the controller and receive enable and switch control signals to achieve flexible control over input source selection and output on / off.

[0069] Figure 2 The following is a flowchart illustrating the power supply method for a vehicle according to an embodiment of this application, in conjunction with... Figure 2 The specific steps of the vehicle power supply method according to the embodiments of this application are described in detail. The power supply method includes the following steps S1-S4.

[0070] S1: In response to the vehicle entering the parking state, obtain the power generation of the solar power module and the power of the vehicle load.

[0071] Preferably, the parking state refers to a state where the vehicle is stationary and the user has activated at least one parking function, including Sentry Mode, Parking Air Conditioning, Parking Refrigerator, or Parking Charger, and the vehicle is powered off, i.e., the ignition switch is in the OFF position, and the drive motor or engine is not working. The controller confirms whether the parking state has been entered by detecting the ignition lock signal, the vehicle network status, and the parking function flag set by the user.

[0072] Furthermore, the specific method for obtaining the power generation of the solar power module is as follows: the solar power module integrates a maximum power point tracking controller, which calculates the real-time power generation by detecting the output voltage and output current of the solar panel, and sends the power generation information to the controller through the communication bus.

[0073] Furthermore, the specific methods for obtaining the power of the vehicle load are as follows: the controller collects the load current through the current sensor at the output end of the DC-DC converter and calculates the real-time power of the vehicle load in combination with the output voltage of the DC-DC converter; or, the controller estimates the power based on the rated power of each parked load and the current operating status, such as compressor start / stop, camera operating frequency, etc.

[0074] In addition, the controller periodically acquires the aforementioned power information at a preset sampling period, such as 100 milliseconds or 1 second, and triggers a fast response when it detects that the power change exceeds the preset fluctuation threshold, so as to ensure timely switching of the power supply mode.

[0075] S2: When the power generation is lower than the preset operating threshold, control the high-voltage battery pack to supply power to the vehicle load.

[0076] Preferably, the preset operating threshold represents the minimum power limit at which the solar power module can effectively output electricity. When the solar power generation is lower than this threshold, it indicates that the current sunlight conditions are insufficient, such as at night, on a cloudy day, under tree shade, in a tunnel, or at dusk. In such environments, the solar power module cannot provide stable and reliable power to the vehicle load. Therefore, the controller controls the high-voltage battery pack to step down the voltage via a DC-DC converter to supply power to the vehicle load, ensuring the continuous operation of the parking function.

[0077] Furthermore, the preset operating threshold value is pre-calibrated based on the area of ​​the solar panel, the photoelectric conversion efficiency, the starting power of the DC converter, and the vehicle's common operating conditions, and is usually set to a fixed value between 10 watts and 50 watts.

[0078] Furthermore, the controller can dynamically adjust this threshold based on weather information, geographical location, season, and local sunrise and sunset times obtained from vehicle networking. For example, when continuous rainy weather is detected, the controller can appropriately increase the preset operating threshold to reduce unnecessary attempts at solar power generation; in sunny summer weather, the threshold can be lowered to make full use of weak sunlight.

[0079] Furthermore, to prevent frequent switching of power supply modes due to brief fluctuations in solar power generation caused by momentary cloud cover, the controller can be configured with hysteresis comparison logic: switching to high-voltage battery pack power supply only occurs when the power generation is continuously below a preset operating threshold and confirmed for a certain period of time; once the power generation recovers and stabilizes above the threshold, it switches back to solar power supply mode. Thus, this application ensures power supply reliability while avoiding frequent switching of power supply modes and reducing system losses.

[0080] S3: When the power generation is not lower than the preset working threshold, the solar power module is controlled to supply power or the solar power module and the low-voltage battery are controlled to supply power together, based on the comparison between the power generation and the power of the vehicle load.

[0081] In some embodiments, when the power generation is not lower than the power of the vehicle load, the solar power module is controlled to supply power to the vehicle load separately. When the power generation is lower than the power of the vehicle load, the solar power module and the low-voltage battery are controlled to supply power to the vehicle load together.

[0082] Preferably, the controller compares the acquired solar power generation with the real-time power of the vehicle load. When the solar power generation is not lower than the vehicle load power, it indicates that the output capacity of the solar power module is sufficient to independently cover the load demand. In this case, the solar power module supplies power to the vehicle load independently, avoiding the consumption of low-voltage battery power, thereby extending the service life of the low-voltage battery and maximizing the use of clean energy.

[0083] Furthermore, when the solar power output is lower than the vehicle's load power, it indicates that the output capacity of the solar power module is insufficient to independently meet the load demand. In this case, relying solely on solar power will cause the load supply voltage to drop and malfunction. If the high-voltage battery pack is activated directly, it will consume the high-voltage battery pack's power, affecting the vehicle's range. Therefore, the controller controls the solar power module and the low-voltage battery to jointly supply power to the vehicle load, with the low-voltage battery supplementing the insufficient power from the solar power.

[0084] This combined power supply method, which primarily uses solar power and secondarily uses low-voltage batteries, maintains the stability of power supply to the load while avoiding frequent use of high-voltage battery packs, achieving a balance between clean energy utilization and high-voltage power conservation. On the one hand, the short-term supplementary power supply from low-voltage batteries smooths out the impact of solar power fluctuations on the load, improving power supply continuity; on the other hand, it reduces reliance on high-voltage battery packs, thereby reducing the impact of parking functions on vehicle range, making it particularly suitable for scenarios with short-term power shortages, such as cloud cover or tree shade.

[0085] In addition, since the low-voltage battery only assists in discharging when solar energy is insufficient, and the discharge current is monitored and controlled by subsequent steps, the risk of over-discharge of the low-voltage battery is avoided.

[0086] S4: When the solar power module and the low-voltage battery work together to supply power, the discharge current of the low-voltage battery is obtained, and when the discharge current is greater than the preset current threshold, the high-voltage battery pack and the solar power module are controlled to work together to supply power to the vehicle load.

[0087] Preferably, the discharge current is collected in real time by an Electronic Battery Sensor (EBS) and reported to the controller at preset intervals.

[0088] The preset current threshold represents the upper limit of the safe continuous discharge current allowed for a low-voltage battery. Its value is pre-calibrated based on the battery type, capacity, ambient temperature, and health status. For example, for a 12V / 60Ah lead-acid battery, the safe discharge current is typically set to 30 to 50 amps; for a 12V lithium battery, a higher value can be set. When the discharge current exceeds the preset current threshold, it indicates that the supplementary load on the low-voltage battery has exceeded its safe discharge capacity. Continuing to rely solely on the low-voltage battery for supplementation may lead to battery overheating, a sudden drop in terminal voltage, accelerated capacity decay, or even damage.

[0089] Furthermore, the preset current threshold is not fixed. The controller can dynamically adjust the preset current threshold based on real-time data collected by the battery sensors, including the low-voltage battery temperature, battery state of health (SOH), and historical discharge data. For example, when the battery temperature is below 0°C, the allowable safe discharge current of the lead-acid battery will decrease significantly, and the controller will correspondingly lower the preset current threshold to avoid sulfation of the battery plates or capacity decay caused by high-current discharge at low temperatures; similarly, when the battery temperature is above 40°C, the threshold will be appropriately lowered to prevent thermal runaway.

[0090] Furthermore, as the battery ages and its internal resistance increases, the controller gradually lowers the threshold based on the SOH value. Simultaneously, the controller records the cumulative discharge of the battery during the current parking cycle. If the cumulative discharge exceeds a set value, even if the discharge current does not exceed the threshold, it can proactively trigger the high-voltage battery pack to replenish the charge in advance. This adaptive threshold management mechanism further enhances the precision of battery over-discharge protection and the system's intelligence level.

[0091] Furthermore, during the period when the solar power module and the low-voltage battery are supplying power together, the controller continuously monitors the discharge current of the low-voltage battery. When the discharge current exceeds a preset current threshold, the controller determines that the current solar power generation is severely insufficient and the load power is high. Relying solely on the low-voltage battery for supplementation is already close to its discharge limit, and continuing high-current discharge will endanger the battery life or cause a voltage drop that affects the load operation. At this time, the controller issues a command to start the high-voltage battery pack, connecting it through a DC-DC converter to jointly supply power to the vehicle load together with the solar power module.

[0092] The intervention of the high-voltage battery pack can share some or all of the load power, thereby rapidly reducing the discharge current of the low-voltage battery to a safe range and achieving over-discharge protection for the low-voltage battery. Simultaneously, since the solar power module is still operating, the high-voltage battery pack only needs to supplement the remaining power difference, effectively saving power compared to a system where the high-voltage battery pack provides power entirely independently.

[0093] This application establishes a dynamic high-voltage intervention mechanism based on a discharge current threshold to promptly activate backup energy when the low-voltage battery approaches overload. This ensures the continuity of power supply to the load, avoids deep discharge of the low-voltage battery, extends battery life, and minimizes the energy consumption of the high-voltage battery pack while ensuring reliability.

[0094] Figure 3 This is a schematic diagram of a low-voltage battery power management process according to an embodiment of this application. The following is in conjunction with... Figure 3 The battery power management steps are described in detail. The low-voltage battery power management steps include the following steps S51-S52.

[0095] S51: Obtain the power of the low-voltage battery. When the power is lower than the first power threshold, the high-voltage battery pack will prioritize powering the vehicle load and simultaneously charge the low-voltage battery.

[0096] Preferably, the first charge threshold represents the critical low charge value of the low-voltage battery. When the charge level is below the first charge threshold, the battery is already in an undervoltage state. If discharge continues, the vehicle may not be able to start or the battery may be permanently damaged.

[0097] The first charge threshold is usually set to 30% to 50% of the rated state of charge of the low-voltage battery, for example, the first charge threshold is set to 40% of the SOC.

[0098] The controller obtains the state of charge of the low-voltage battery in real time through the battery sensor. When the battery level is detected to be lower than the first power threshold, regardless of the current power supply mode or the level of solar power generation, it immediately forces a switch to the high-voltage battery pack power supply mode. At the same time, the power of the high-voltage battery pack is used to charge the low-voltage battery after being stepped down by the DC-DC converter.

[0099] Furthermore, the triggering priority of this step is higher than the aforementioned power supply switching logic based on power and discharge current. When the low-voltage battery charge is too low, the system no longer considers whether solar energy is available or whether the discharge current is too large, but directly activates the high-voltage battery pack to undertake the power supply task for the entire vehicle load, and simultaneously replenishes the low-voltage battery with energy.

[0100] The low-voltage battery power management mechanism avoids the risk of the vehicle failing to start due to low battery power, ensuring the basic reliability of the vehicle. Secondly, during forced charging, the power supply to the vehicle load is not affected, and parking functions such as Sentry Mode and Parking Refrigerator can continue to operate. Furthermore, the high-voltage battery pack supplies power simultaneously during charging, eliminating the need for additional charging circuits and allowing the use of existing DC-DC converters, thus reducing system costs.

[0101] S52: During the period when the high-voltage battery pack supplies power to the vehicle load and simultaneously charges the low-voltage battery, when the low-voltage battery charge recovers to above the second charge threshold, the charging of the high-voltage battery pack is stopped, and the power supply is restored to either the solar power module alone or the solar power module and the low-voltage battery together, based on the comparison between the power generation of the solar power module and the power of the vehicle load.

[0102] Preferably, the second power threshold represents the safe recovery power value of the low-voltage battery, and its value is higher than the first power threshold. For example, the second power threshold can be set to 60% to 80% of the rated state of charge of the low-voltage battery. By setting the hysteresis between the first power threshold and the second power threshold, the frequent switching in and out of the high-voltage battery pack caused by repeated fluctuations in power around the threshold can be avoided, thereby reducing the switching losses of the high-voltage relay and DC-DC converter and extending the service life of the system.

[0103] Furthermore, while the high-voltage battery pack supplies power to the vehicle load and simultaneously charges the low-voltage battery, the battery sensors continuously monitor the state of charge of the low-voltage battery and report the charge information to the controller in real time. When the controller detects that the charge has recovered to above the second charge threshold, it determines that the low-voltage battery has left the undercharge danger zone and is capable of resuming its power supply function.

[0104] At this point, the controller issues a command to stop the charging output of the high-voltage battery pack, that is, to control the DC converter to cut off the charging circuit from the high-voltage battery pack to the low-voltage battery. However, whether the high-voltage battery pack continues to supply power to the vehicle load is decided again based on the comparison between the current power generation of the solar power module and the power of the vehicle load.

[0105] Specifically, the controller reacquires the solar power generation and load power. If the solar power generation is not lower than the load power, the system will resume supplying power to the vehicle load solely by the solar power module. If the solar power generation is lower than the load power, the system will resume supplying power jointly by the solar power module and the low-voltage battery.

[0106] Through the aforementioned recovery mechanism, this application can immediately switch back to a clean energy-priority power supply mode after the low-voltage battery power returns to normal, minimizing the usage time of the high-voltage battery pack, thereby reducing the power consumption of the high-voltage battery pack and optimizing the vehicle's range. Simultaneously, because charging is only stopped without disconnecting the high-voltage battery pack's power supply to the load during the charging process, uninterrupted power supply to the load is ensured during the recovery switch, enhancing the user's seamless experience.

[0107] Figure 5 This is a schematic diagram of the power replenishment management process after exiting the parking state according to the implementation method of this application. The following is in conjunction with... Figure 5 The battery power management steps are explained in detail. The battery charging management steps after exiting the parking state include the following steps S61-S63.

[0108] S61: In response to the vehicle exiting the parking state, obtain the power of the low-voltage battery.

[0109] Preferably, exiting the parking state includes at least one of the following situations: the user manually disables the parking function, such as disabling the sentry mode or parking air conditioning via the vehicle's infotainment system or mobile app; the vehicle is remotely woken up and started; the low-voltage battery charge causes the system to forcibly exit; or the user unlocks the vehicle to prepare for driving. The controller determines whether to exit the parking state by detecting user operation signals, vehicle network status, and ignition switch status.

[0110] Furthermore, when the controller detects that the vehicle has exited the parking state, it first reads the real-time state of charge of the low-voltage battery via the battery sensor. This reading operation is completed the instant the vehicle exits the parking state to obtain the final battery charge level during the parking function's operation. The controller compares the obtained charge level with a preset second charge threshold to determine whether to subsequently enter charging management or directly enter sleep mode.

[0111] This step allows the applicant to promptly ascertain the low-voltage battery charge status after the parking function is used, providing a basis for subsequent decisions on solar power replenishment or hibernation, and avoiding difficulties in starting the vehicle next time due to unknown battery charge.

[0112] S62: If the battery level is lower than the second battery level threshold, the solar power module will charge the low-voltage battery until the preset charging stop condition is met.

[0113] Preferably, the preset charging stop condition includes the low-voltage battery reaching a preset full-charge threshold, such as a state of charge of 95% or 100%, or a set threshold higher than full charge. The controller stops charging when the battery level meets this condition to ensure that the low-voltage battery is fully replenished and to prevent subsequent power loss due to insufficient charging.

[0114] Furthermore, when the vehicle exits the parking state and the low-voltage battery power is detected to be lower than the second power threshold, the controller first determines whether the solar power module is available, that is, whether the solar power generation is higher than the preset operating threshold.

[0115] If available, the controller controls the DC converter to convert the electrical energy from the solar power module to charge the low-voltage battery; if the solar power module is unavailable, the controller can choose not to charge or delay until the solar energy is restored before starting charging.

[0116] During charging, the controller continuously monitors the charge level of the low-voltage battery and only stops charging when the charge level reaches a preset full charge or higher threshold. This charging process does not involve power supply to the vehicle's load; it only replenishes the low-voltage battery, resulting in low power consumption and allowing it to continue for extended periods after the user has left the vehicle.

[0117] Through this mechanism, this application makes full use of solar energy to replenish the low-voltage battery, restoring it to a fully charged state. This avoids the user being unable to start the vehicle due to a depleted battery the next time they use it, and achieves automatic energy replenishment after the parking function is used, thereby improving the user experience and vehicle reliability.

[0118] S63: If the battery level is not lower than the second battery level threshold, control the vehicle to enter a sleep state.

[0119] Preferably, the hibernation state refers to the vehicle's various control systems entering a low-power mode, including the controller stopping its main computing tasks, the DC-DC converter shutting down its output, and the battery sensors entering a periodic wake-up detection mode. In hibernation state, the vehicle's static current is reduced to the milliampere level to minimize the power consumption of the low-voltage battery and extend the parking time.

[0120] Furthermore, when the low-voltage battery charge is not lower than the second charge threshold, it indicates that the battery charge is at a healthy level and does not require immediate replenishment. The controller then sends a sleep command to the vehicle network, notifying each electronic control unit to enter sleep mode.

[0121] During hibernation, the battery sensor periodically wakes up to detect low-voltage battery power, for example, once every 24 hours. If the detected power level drops to a preset hibernation wake-up threshold, the system can be triggered to reassess and initiate solar power replenishment.

[0122] In addition, the solar power module can still maintain standby monitoring in the dormant state. If the power generation continues to be higher than the preset threshold and the battery power shows a downward trend, the system can be woken up and perform a power replenishment operation.

[0123] Through the aforementioned hibernation management, this application minimizes vehicle static energy consumption and extends vehicle parking time while ensuring sufficient battery power, and retains the ability to automatically replenish power when necessary, thus achieving a balance between energy consumption management and battery maintenance.

[0124] Combination Figure 5 As shown, this embodiment discloses a specific implementation of a computer device. The computer device may include a processor 41 and a memory 42 storing computer program instructions.

[0125] Specifically, the processor 41 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0126] The memory 42 may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory 42 may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 42 may include removable or non-removable (or fixed) media. Where appropriate, the memory 42 may be internal or external to the data processing device. In a particular embodiment, the memory 42 is non-volatile. Volatile memory. In a particular embodiment, memory 42 includes read-only memory. ROM (ROM-only memory) and RAM (Random Access Memory). Where appropriate, the ROM can be a mask-programmed ROM or a programmable ROM. Only Memory (PROM) and Erasable Programmable Read-Only Memory (EPRROM) The RAM can be a type of RAM, such as EPROM (Electrically Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), EAROM (Electrically Alterable Read-Only Memory), or FLASH (Flash Memory), or a combination of two or more of these. Where appropriate, the RAM can be a Static Random Access Memory (SRAM). Access Memory (SRAM) or Dynamic Random Access Memory (DRAM) can be Fast Page Mode Dynamic Random Access Memory (FPMDRAM), Extended Data Out Dynamic Random Access Memory (EDODRAM), Synchronous Dynamic Random-Access Memory (SDRAM), etc.

[0127] The memory 42 can be used to store or cache various data files that need to be processed and / or used for communication, as well as possible computer program instructions executed by the processor 41.

[0128] The processor 41 implements the vehicle control method in the above embodiments by reading and executing computer program instructions stored in the memory 42.

[0129] In some embodiments, the computer device may further include a communication interface 43 and a bus 40. For example, Figure 4 As shown, the processor 41, memory 42, and communication interface 43 are connected through bus 40 and complete communication with each other.

[0130] Communication interface 43 is used to enable communication between modules, devices, units and / or equipment in the embodiments of this application.

[0131] Communication port 43 can also enable data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0132] Bus 40 includes hardware, software, or both, that couples components of a computer device together. Bus 40 includes, but is not limited to, at least one of the following: a data bus, an address bus, a control bus, an expansion bus, and a local bus. For example, and not as a limitation, bus 40 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, and a PCI bus. Express (PCI X) bus, Serial Advanced Technology Accessory (Seria l Advanced) The bus may be a Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 40 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, this application contemplates any suitable bus or interconnect.

[0133] Furthermore, in conjunction with the vehicle control methods in the above embodiments, this application embodiment can provide a computer-readable storage medium for implementation. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the vehicle control methods in the above embodiments.

[0134] The present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described vehicle control method.

[0135] The present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described vehicle control method.

[0136] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A power supply method for a vehicle, applied to a vehicle equipped with a solar power module, a low-voltage battery, and a high-voltage battery pack, characterized in that, The power supply method includes: In response to the vehicle entering the parking state, the power generation of the solar power module and the power of the vehicle load are obtained; When the power generation is lower than the preset operating threshold, the high-voltage battery pack is controlled to supply power to the vehicle load. When the power generation is not lower than the preset working threshold, the solar power supply module is controlled to supply power or the solar power supply module and the low-voltage battery are controlled to supply power together, based on the comparison result between the power generation and the power of the vehicle load. When the solar power module and the low-voltage battery work together to supply power, the discharge current of the low-voltage battery is obtained, and when the discharge current is greater than a preset current threshold, the high-voltage battery pack and the solar power module are controlled to work together to supply power to the vehicle load.

2. The power supply method for the vehicle according to claim 1, characterized in that, The step of controlling the solar power module to supply power or the solar power module and the low-voltage battery to supply power together based on the comparison result of the power generation power and the power of the vehicle load includes: When the power generation is not lower than the power of the vehicle load, the solar power module is controlled to supply power to the vehicle load separately. When the power generation is lower than the power of the vehicle load, the solar power module and the low-voltage battery are controlled to jointly supply power to the vehicle load.

3. The power supply method for the vehicle according to claim 1, characterized in that, Also includes: The power level of the low-voltage battery is obtained. When the power level is lower than a first power threshold, the high-voltage battery pack is given priority to supply power to the vehicle load, and at the same time, the high-voltage battery pack charges the low-voltage battery.

4. The method according to claim 3, characterized in that, Also includes: During the period when the high-voltage battery pack supplies power to the vehicle load and simultaneously charges the low-voltage battery, when the charge of the low-voltage battery recovers to a level higher than the second charge threshold, the charging of the high-voltage battery pack is stopped, and the power supply is restored to either solely powered by the solar power module or jointly powered by the solar power module and the low-voltage battery, based on the comparison between the power generation of the solar power module and the power of the vehicle load.

5. The method according to claim 4, characterized in that, Also includes: In response to the vehicle exiting the parking state, the power level of the low-voltage battery is obtained; If the power level is lower than the second power threshold, the solar power module will charge the low-voltage battery until the preset charging stop condition is met. If the battery level is not lower than the second battery level threshold, the vehicle is controlled to enter a sleep state.

6. The method according to claim 1, characterized in that, Both the solar power module and the high-voltage battery pack supply power to the vehicle load and / or charge the low-voltage battery via a DC-DC converter.

7. A vehicle for implementing the power supply method for the vehicle as described in any one of claims 1-6, characterized in that, include: The controller is electrically connected to the solar power module, the low-voltage battery, the high-voltage battery pack and the vehicle load respectively. The controller is configured to acquire the power generation of the solar power module, the charge and discharge current of the low-voltage battery and the power of the vehicle load, and generate control commands based on the acquired signals to control the power supply switching between the solar power module, the low-voltage battery and the high-voltage battery pack. A DC-DC converter is electrically connected to the solar power module, the low-voltage battery, the high-voltage battery pack, and the vehicle load, respectively. It is used to receive control commands from the controller and convert the electrical energy of the solar power module, the low-voltage battery, or the high-voltage battery pack into voltages according to the control commands, so as to output a voltage adapted to the vehicle load and / or the low-voltage battery. A solar power module is electrically connected to the vehicle load and / or the low-voltage battery via the DC-DC converter. A high-voltage battery pack, which is electrically connected to the vehicle load and / or the low-voltage battery via the DC-DC converter; A low-voltage battery is electrically connected to the vehicle load via the DC-DC converter.

8. A vehicle according to claim 7, characterized in that, The DC-DC converter has an internal switching circuit. The controller controls the switching circuit to switch on and off via the control command, thereby controlling the power supply switching between the solar power module, the low-voltage battery, and the high-voltage battery pack.

9. A vehicle according to claim 7, characterized in that, Also includes: A battery sensor, electrically connected to the low-voltage battery and the controller, is used to detect the charge and discharge current of the low-voltage battery and transmit the charge and discharge current of the low-voltage battery to the controller.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the power supply method for the vehicle as described in any one of claims 1 to 6.

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