Electric vehicle charging system and method

Abstract

The present invention relates to the technical field of electric vehicle charging. Disclosed are an electric vehicle charging system and method. The system comprises: a vehicle body control unit configured to control the operating state of a solar power generation device on the basis of a vehicle state and an environmental condition; the solar power generation device configured to convert solar energy into electric energy during operation; an energy control unit configured to charge an energy storage device by using the electric energy converted from the solar energy; and the energy storage device configured to store the electric energy. In this way, dependence of electric vehicles on traditional charging facilities can be reduced, and especially in remote areas, solar charging provides an additional power replenishment method, thereby alleviating the problem of insufficient charging facilities; moreover, as a sustainable energy source, solar charging extends the driving range of the vehicles, and reduces the charging frequency and charging duration, thereby effectively alleviating the range and charging anxiety of users, and improving the use convenience and promotion potential of electric vehicles.

Description

A charging system and method for electric vehicles Technical Field

[0001] This invention relates to the field of electric vehicle charging technology, and specifically to an electric vehicle charging system and method. Background Technology

[0002] With the advancement of science, environmental and energy issues have become a focal point, leading to the emergence of electric vehicles. However, traditional electric vehicles rely solely on batteries as their power source, a design with numerous limitations. Firstly, battery capacity is limited, failing to meet the demands of long-distance travel. Secondly, long charging times significantly reduce vehicle efficiency. More seriously, in remote areas, inadequate charging infrastructure can prevent owners from timely recharging, directly impacting normal driving and causing widespread range anxiety and charging anxiety among consumers, hindering the promotion and use of electric vehicles. Therefore, existing technologies urgently need improvement to address these issues. Summary of the Invention

[0003] In view of this, the present invention provides an electric vehicle charging system and method that can solve the problems of limited battery capacity, long charging time, and inability to charge in remote areas in a timely manner in the prior art.

[0004] This invention provides the following technical solutions:

[0005] An electric vehicle charging system includes a solar power generation device, an energy control unit, an energy storage device, and a vehicle body control unit; wherein:

[0006] The vehicle body control unit is used to control the operating status of the solar power generation device according to the vehicle status and environmental conditions.

[0007] The solar power generation device is used to convert solar energy into electrical energy during operation;

[0008] The energy control unit is used to charge the energy storage device using electrical energy converted from solar energy.

[0009] The energy storage device is used to store electrical energy.

[0010] Preferably, it also includes a power generation controller;

[0011] The power generation controller is connected to the solar power generation device and is used to output a power generation signal to the energy control unit when the solar power generation device is working, so that the energy control unit can realize the charging function.

[0012] Preferably, it also includes a DC / DC converter; wherein:

[0013] The energy control unit is also used to control the conduction of the corresponding high-voltage circuit so as to transmit the electrical energy converted from solar energy to the DC / DC converter.

[0014] The DC / DC converter is used to convert the received electrical energy into low-voltage DC power to output low-voltage power to the vehicle.

[0015] Preferably, it also includes a DC / AC converter; wherein:

[0016] The vehicle body control unit is also used to output an external discharge signal to the energy control unit;

[0017] The energy control unit is also used to control the conduction of the corresponding charging and discharging circuits to transmit the electrical energy converted from solar energy to the DC / AC converter;

[0018] The DC / AC converter is used to convert received electrical energy into high-voltage AC power and provide high-voltage AC power charging function through a corresponding interface.

[0019] Preferably, the solar power generation device includes a double-layer solar panel adapted to the shape of the vehicle roof. The lower solar panel is fixedly installed on the vehicle roof, and the upper solar panel is retractably installed on top of the lower solar panel. When retracted, it covers the lower solar panel, and when extended, it forms a larger solar panel with the lower solar panel.

[0020] Preferably, it also includes a light sensor and an ultrasonic radar installed around the upper solar panel; wherein:

[0021] The light sensor is used to collect light information;

[0022] The ultrasonic radar is used to detect surrounding obstacles and obtain obstacle information;

[0023] The vehicle body control unit is also used to control the upper solar panel to retract or extend based on the illumination information and the obstacle information.

[0024] Preferably, the vehicle body control unit is also used to automatically adjust the angle of the double-layer solar panel so that the double-layer solar panel is perpendicular to the sunlight.

[0025] Preferably, the double-layer solar panel is a solar panel made of a spectrally selective material. The vehicle control unit is further configured to determine, based on the illumination information and the spectrally selective material, the optimal spectral response that enables the double-layer solar panel to achieve maximum energy conversion efficiency, determine a target voltage based on the optimal spectral response, and apply the target voltage to the double-layer solar panel.

[0026] Preferably, the energy control unit is specifically used to determine whether the energy storage device has reached the charging condition. If it has, the energy storage device is charged; otherwise, it is determined that the energy storage device does not need to be charged.

[0027] A method for charging an electric vehicle, characterized in that it is applied to an electric vehicle charging system as described in any of the preceding claims, the method comprising:

[0028] The vehicle body control unit controls the operating status of the solar power generation device based on the vehicle status and environmental conditions;

[0029] The solar power generation device starts working under the control of the vehicle body control unit, converting solar energy into electrical energy;

[0030] The energy control unit uses the electrical energy converted from solar energy to charge the energy storage device;

[0031] The energy storage device stores the received electrical energy.

[0032] In this invention, the vehicle body control unit controls the operation of the solar power generation device based on the vehicle status and environmental conditions. The solar power generation device converts solar energy into electrical energy, which the energy control unit then uses to charge the energy storage device. This reduces the reliance of electric vehicles on traditional charging infrastructure. Especially in remote areas, solar charging provides an additional way to supplement electricity, alleviating the problem of insufficient charging facilities. Simultaneously, as a sustainable energy source, solar charging extends the vehicle's driving range, reduces charging frequency and time, effectively alleviating users' range and charging anxiety, and improving the convenience and promotion potential of electric vehicles. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 is a schematic diagram of an electric vehicle charging system according to an embodiment of the present invention;

[0035] Figure 2 is a flowchart of an electric vehicle charging method according to an embodiment of the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please refer to Figure 1, which shows a schematic diagram of the structure of an electric vehicle charging system provided in an embodiment of the present invention, which may include a solar power generation device 11, an energy control unit 12, an energy storage device 13, and a vehicle body control unit 14; wherein:

[0038] The vehicle body control unit 14 is used to control the operating status of the solar power generation device 11 according to the vehicle status and environmental conditions.

[0039] A solar power generation device 11 is used to convert solar energy into electrical energy during operation;

[0040] Energy control unit 12 is used to charge energy storage device 13 using electrical energy converted from solar energy;

[0041] Energy storage device 13 is used to store electrical energy.

[0042] A solar power generation device is a device that converts solar energy into electrical energy, typically including solar panels, such as flexible solar panels. An energy control unit is a device used to manage and control energy flow, ensuring the efficient transmission and storage of electrical energy. Energy storage devices are used to store electrical energy, typically including power batteries such as lithium-ion batteries and nickel-metal hydride batteries. A vehicle body control unit is a device used to manage and control various parts of the vehicle, including automatically adjusting the operating status of the solar power generation device based on vehicle status and environmental conditions to ensure normal vehicle operation. Additionally, when the solar panel is flexible, controlling its operation involves deploying the flexible solar panel.

[0043] The vehicle control unit can determine whether the vehicle status and environmental conditions are suitable for solar charging. If so, it will control the solar power generation device to work; otherwise, it will control the solar power generation device to not work. When the solar power generation device works under the control of the vehicle control unit, it will convert solar energy into electrical energy. The energy control power supply uses the electrical energy converted from solar energy to charge the energy storage device. The energy storage device receives and stores the electrical energy, thereby using solar energy to charge the electric vehicle.

[0044] It should be noted that the vehicle control unit can determine whether solar charging is suitable based on the vehicle status and environmental conditions. For example, if the sunlight is suitable and driving is safe, then solar charging is considered suitable; otherwise, it is considered unsuitable. Suitable sunlight may include strong light intensity, i.e., reaching a corresponding intensity threshold; driving safety may include the vehicle being parked or in a stable driving state. Of course, other settings can be made according to actual needs, all of which are within the scope of this invention.

[0045] In this invention, the vehicle body control unit controls the operation of the solar power generation device based on the vehicle status and environmental conditions. The solar power generation device converts solar energy into electrical energy, which the energy control unit then uses to charge the energy storage device. This reduces the reliance of electric vehicles on traditional charging infrastructure. Especially in remote areas, solar charging provides an additional way to supplement electricity, alleviating the problem of insufficient charging facilities. Simultaneously, as a sustainable energy source, solar charging extends the vehicle's driving range, reduces charging frequency and time, effectively alleviating users' range and charging anxiety, and improving the convenience and promotion potential of electric vehicles.

[0046] The electric vehicle charging system provided in this embodiment of the invention may further include a power generation controller; the power generation controller is connected to a solar power generation device and is used to output a power generation signal to the energy control unit when the solar power generation device is working, so that the energy control unit can realize the charging function.

[0047] When the solar power generation device is a solar panel, the power generation controller (or photovoltaic controller) outputs a power generation signal to the energy control unit to ensure that the energy control unit can respond to the signal and perform the charging function.

[0048] The power generation controller can be implemented in various ways. For example, it may include a microprocessor to process signals from the solar power generation device and generate corresponding power generation signals. The controller may also include a communication module for communicating with the energy control unit to ensure timely transmission of the power generation signals. As a preferred embodiment, the controller may further include a power management module for managing and regulating the output voltage and current of the power generation signals to adapt to the needs of different energy control units.

[0049] This application introduces a power generation controller that can output a power generation signal to the energy control unit in real time while the solar power generation device is operating, thereby ensuring that the energy control unit can perform the charging function in a timely manner. Compared with existing technologies, this application provides a more reliable and efficient solution that can effectively improve the charging efficiency and ease of use of electric vehicles, solve the problem of traditional electric vehicles being unable to charge in remote areas in a timely manner, and reduce consumers' range anxiety and charging anxiety.

[0050] The electric vehicle charging system provided in this embodiment of the invention may further include a DC / DC converter; wherein:

[0051] The energy control unit is also used to control the conduction of the corresponding high-voltage circuits to transmit the electrical energy converted from solar energy to the DC / DC converter.

[0052] A DC / DC converter is used to convert received electrical energy into low-voltage DC power to provide low-voltage power to the vehicle.

[0053] In this embodiment of the invention, the energy control unit controls the high-voltage circuit to transmit the electrical energy converted from solar energy to the DC / DC converter. The DC / DC converter converts the received high-voltage electrical energy into low-voltage DC power to provide low-voltage power to the vehicle. Thus, through the cooperation of the energy control unit and the DC / DC converter, the electrical energy converted from solar energy can be efficiently transmitted and converted into low-voltage DC power, thereby achieving efficient energy utilization.

[0054] Specifically, the energy control unit can receive a wake-up signal from the generator controller and control the high-voltage circuit to conduct according to a pre-set charging and discharging strategy, thereby realizing the transmission of electrical energy converted from solar energy. The DC / DC converter can employ high-efficiency conversion technologies, such as synchronous rectification, to convert the obtained electrical energy (high-voltage DC) into low-voltage DC (e.g., 12V), improving the energy conversion efficiency. As a preferred embodiment, the DC / DC converter can include multi-stage conversion circuits. These circuits process electrical energy in stages, optimizing the voltage and current matching of each stage to reduce energy loss. Simultaneously, through inter-stage filtering and voltage regulation design, voltage fluctuations are suppressed, thereby improving overall conversion efficiency and stability. The cooperation between the energy control unit and the DC / DC converter, through reasonable circuit design and control strategies, can achieve efficient energy transmission and conversion.

[0055] In addition, when the solar power generation device is not working, the energy control unit can control the high-voltage circuit to be connected through the vehicle's start-up self-reset switch. The DC / DC converter then converts the high-voltage electricity output from the energy storage device into low-voltage electricity, enabling the vehicle's low-voltage system to be powered by a constant-fire power supply and realizing the auxiliary function of the low-voltage battery.

[0056] Therefore, this application, by introducing an energy control unit and a DC / DC converter, achieves efficient transmission and conversion of electrical energy obtained from solar energy conversion, solving the problems of low power transmission efficiency and unstable conversion in existing technologies. Simultaneously, this application can provide a stable low-voltage power supply for the entire vehicle, eliminating the need for a low-voltage auxiliary battery, reducing vehicle weight, improving vehicle energy utilization, and facilitating vehicle layout while reducing overall vehicle cost. Thus, in this way, this application not only improves electrical energy utilization efficiency but also optimizes the vehicle's power system configuration.

[0057] The electric vehicle charging system provided in this embodiment of the invention may further include a DC / AC converter; wherein:

[0058] The body control unit is also used to output external discharge signals to the energy control unit;

[0059] The energy control unit is also used to control the conduction of the corresponding charging and discharging circuits to transmit the electrical energy converted from solar energy to the DC / AC converter;

[0060] A DC / AC converter is used to convert received electrical energy into high-voltage AC power and provide charging functionality for the high-voltage AC power through a corresponding interface.

[0061] In this embodiment of the invention, the vehicle body control unit is responsible for outputting an external discharge signal, and the energy control unit controls the conduction of the charging and discharging circuit to transmit the electrical energy converted from solar energy to the DC / AC converter. The DC / AC converter then converts the electrical energy into high-voltage AC power. In this way, through the corresponding interface, a high-voltage AC charging function can be provided to external devices, enabling the efficient supply of electrical energy converted from solar energy to external devices.

[0062] Specifically, the vehicle control unit can detect vehicle status and environmental conditions through sensors to determine whether to activate the external discharge switch to output an external discharge signal. Upon receiving the signal, the energy control unit controls the charging and discharging circuit to conduct according to a preset charging and discharging strategy, transmitting the solar-converted electrical energy to the DC / AC converter. The DC / AC converter, upon receiving the electrical energy, converts the DC power into high-voltage AC power (220V) through its internal circuitry and outputs it through a corresponding interface. This method can not only power internal vehicle equipment but also provide power to other devices via external interfaces, meeting low-power electricity needs, improving user experience, and reducing energy consumption of the power battery.

[0063] Therefore, by adding a DC / AC converter, this embodiment of the invention realizes the function of converting solar power into high-voltage AC power, which meets the charging needs of external devices, provides the utilization of solar power, reduces the energy consumption of energy storage devices, improves the user experience, solves the problem of electric vehicles not being able to charge in remote areas in a timely manner, and further promotes the promotion and application of electric vehicles.

[0064] It should also be noted that the charging and discharging strategies involved in the embodiments of the present invention can be any of the relevant strategies in the prior art, or other strategies set according to actual needs. In practical applications, the use of solar-converted electrical energy (excluding the electrical energy already stored in the energy storage device) can be realized in the order of priority: charging the energy storage device, providing the vehicle's low-voltage power supply, and outputting high-voltage AC power. For example, if the energy storage device does not need to be charged, then the vehicle's low-voltage power supply and high-voltage AC power output will be performed. If the energy storage device does not need to be charged and the vehicle's low-voltage power supply does not need to be provided, then the high-voltage AC power output will be performed. Thus, the use of solar-converted electrical energy is realized in order of importance from high to low.

[0065] In an electric vehicle charging system provided by this invention, the solar power generation device may include a double-layer solar panel adapted to the shape of the vehicle roof. The lower solar panel of the double solar panel is fixedly installed on the vehicle roof, and the upper solar panel of the double solar panel is retractable and installed on the lower solar panel. When retracted, it covers the lower solar panel, and when extended, it forms a larger solar panel with the lower solar panel.

[0066] In this embodiment, the upper solar panel in the double-layer solar panel can extend and retract via an electrically operated telescopic mechanism. Specifically, the upper solar panel can be controlled by an electric slide rail or a hydraulic system, allowing it to automatically extend or retract as needed. When extended, the upper solar panel combines with the lower solar panel to form a panel with a total effective power generation area equal to the sum of the two solar panels. When retracted, it covers the lower solar panel, and the total effective power generation area is equal to the effective power generation area of ​​the upper solar panel. Furthermore, the solar panel is adapted to the shape of the vehicle roof to improve its compatibility with the vehicle. The surface of the solar panel can also be made of waterproof and dustproof materials to improve its durability and lifespan.

[0067] This embodiment features a dual-layer solar panel system. The lower solar panel is fixed to the vehicle roof to ensure stability and basic power generation. The upper solar panel is retractable and mounted on top of the lower panel, expanding the solar panel area. This significantly increases the effective power generation area of ​​the solar panels without increasing the roof area, thus improving solar power generation efficiency. Simultaneously, the retractable design allows the upper solar panel to retract when not in use, protecting the lower panel and reducing wind resistance. Therefore, through this embodiment's technical solution, electric vehicles can more effectively utilize solar energy for charging, alleviating range anxiety and charging anxiety associated with electric vehicles.

[0068] The electric vehicle charging system provided in this embodiment of the invention may further include a light sensor and an ultrasonic radar installed around the upper solar panel; wherein:

[0069] A light sensor is used to collect light information;

[0070] Ultrasonic radar is used to detect surrounding obstacles and obtain obstacle information;

[0071] The vehicle body control unit is also used to control the retraction or extension of the upper solar panels based on lighting and obstacle information.

[0072] A light sensor can be installed on the roof to collect light information; an ultrasonic radar can be installed around the upper solar panel (such as at the front) to detect surrounding obstacles; based on this information, the vehicle control unit controls the extension and retraction of the upper solar panel. The extension and retraction of the upper solar panel can be automatically controlled by the vehicle control unit based on signals from the light sensor and ultrasonic radar, ensuring that it unfolds under optimal lighting conditions and retracts in time when an obstacle is detected to avoid collision.

[0073] Specifically, light sensors can be implemented using commonly available components such as photoresistors and photodiodes. These components can monitor light intensity in real time and transmit the data to the vehicle control unit. Ultrasonic radar can use a combination of ultrasonic transmitters and receivers, emitting ultrasonic waves and receiving reflected waves to detect the distance and position of surrounding obstacles. The installation locations of these sensors should be kept as unobstructed as possible to ensure data accuracy. The vehicle control unit can process the light and obstacle information and then control the extension and retraction of the upper solar panels based on this information. For example, if the current light intensity is insufficient and there are no obstacles nearby, the upper solar panels can be extended to effectively increase the effective power generation area.

[0074] This embodiment achieves intelligent control of the solar panel by adding a light sensor and ultrasonic radar. It can automatically adjust the effective area of ​​the solar panel according to real-time lighting conditions and the surrounding environment, which not only improves the energy conversion efficiency of the solar panel, but also effectively avoids damage caused by obstacles, ensuring the safety and reliability of the system.

[0075] In an electric vehicle charging system provided by this invention, the vehicle body control unit is also used to automatically adjust the angle of the double-layer solar panel so that the double-layer solar panel is perpendicular to the sunlight.

[0076] The vehicle control unit adjusts the angle of the solar panels according to the direction of sunlight to keep them in the optimal position, thereby improving the efficiency of power generation. As a result, electric vehicles can achieve higher energy conversion efficiency during charging, reduce charging time, and improve driving range.

[0077] Specifically, the vehicle body control unit can automatically adjust the angle of the dual-layer solar panels in several ways. For example, the control unit can combine sunlight information collected by a light sensor to calculate the direction of sunlight in real time and adjust the angle of the solar panels accordingly, ensuring that the power-generating surface is perpendicular to the sunlight. As a preferred implementation, the control unit can use an electric motor or hydraulic system to achieve precise adjustment of the solar panel angle. Furthermore, the control unit can utilize ultrasonic radar installed around the upper solar panel to detect surrounding obstacles in real time, ensuring safety during the adjustment process.

[0078] In an electric vehicle charging system provided by this invention, the double-layer solar panel is a solar panel made of spectrally selective material. The vehicle control unit is also used to determine the optimal spectral response that maximizes the energy conversion efficiency of the double-layer solar panel based on illumination information and spectrally selective material, determine the target voltage based on the optimal spectral response, and apply the target voltage to the double-layer solar panel.

[0079] Both sides of the double-layer solar panels can utilize spectrally selective materials. These materials selectively absorb light of specific wavelengths. By introducing spectrally selective materials, the solar panels can automatically adjust their absorption efficiency for different wavelengths of light according to illumination conditions. For example, they enhance the absorption of blue light on cloudy days and enhance the absorption of red light on sunny days, thereby improving energy conversion efficiency. The vehicle control unit collects illumination information and, combined with the characteristics of the spectrally selective materials, determines the optimal spectral response. Then, based on this optimal spectral response, it determines the target voltage and applies this target voltage to the double-layer solar panels. Based on this, the system can automatically adjust the operating state of the solar panels under different illumination conditions to ensure they are always at their optimal energy conversion efficiency, thus effectively solving the problem of how to improve the energy conversion efficiency of solar panels.

[0080] The advantage of spectrally selective materials lies in their ability to selectively absorb light of specific wavelengths, thereby maximizing the utilization of solar energy. Specifically, the vehicle control unit first collects current illumination information, and, combined with the characteristics of the spectrally selective material, calculates the optimal spectral response that achieves the maximum energy conversion efficiency under the current conditions. Based on this optimal spectral response, the corresponding target voltage is further determined and applied to the double-layer solar panels.

[0081] This process can be achieved in the following ways: First, a spectral analyzer can be used to monitor the current lighting conditions in real time, and the optimal spectral response can be calculated based on the monitored data. Second, a series of correspondences between spectral responses and target voltages can be pre-set, and the vehicle body control unit can select the most suitable combination of response and voltage according to the current lighting conditions. As a preferred implementation, the vehicle body control unit can continuously adjust the target voltage through a feedback mechanism to cope with dynamic changes in lighting conditions.

[0082] The above process can also be achieved in another way: Illumination condition monitoring collects a large amount of data on illumination conditions (including light intensity, spectral distribution, and ambient temperature) and spectral responses (including absorption peak wavelength and absorptivity) as a training set. Machine learning algorithms such as neural networks and support vector machines are used to train a model based on the training set. When needed, illumination conditions are input into the model to predict the corresponding optimal spectral response. After obtaining the optimal spectral response, the target voltage is obtained according to the following formula:

[0083] Among them, V target Let h represent the target voltage, c represent Planck's constant, and λ represent the speed of light. target Indicates the wavelength of the absorption peak in the optimal spectral response. α represents the initial band (the band width of a spectrally selective material when no voltage is applied), and α represents the electrochromic coefficient (the band change caused by a unit voltage).

[0084] This application utilizes a double-layer solar panel made of spectrally selective materials and combines it with the intelligent adjustment function of the vehicle control unit to automatically optimize the energy conversion efficiency of the solar panel under different lighting conditions. Therefore, the technical solution of this application can significantly improve the energy conversion efficiency of the solar panel, especially under changing lighting conditions, and can maintain a high energy output, thus solving the problem of unstable efficiency of traditional solar panels under different lighting conditions.

[0085] In an electric vehicle charging system provided by this invention, the energy control unit is specifically used to determine whether the energy storage device has reached the charging condition. If it has, the energy storage device is charged; otherwise, it is determined that the energy storage device does not need to be charged.

[0086] The energy control unit detects the energy storage device's power status and determines whether to charge it based on whether the power level meets charging requirements. This ensures timely charging when the energy storage device's power level falls below a predetermined level, preventing insufficient power. Simultaneously, it avoids unnecessary charging operations when the power level is sufficient, improving energy utilization efficiency. This judgment and control mechanism, through real-time monitoring and intelligent judgment of the energy storage device's power level, effectively solves the problem of whether the energy storage device needs charging, ensuring the normal operation of electric vehicles.

[0087] Furthermore, the energy control unit can determine the energy storage device's power level in various ways. For example, it can monitor the device's voltage level in real time using a voltage sensor, triggering a charging operation when the voltage falls below a preset value; alternatively, it can monitor the charging and discharging current of the device using a current sensor, determining the device's power status based on current changes. Additionally, the energy control unit can combine data from a temperature sensor to monitor the device's temperature, ensuring charging operations occur within a safe temperature range. As a preferred implementation, the energy control unit can integrate data from multiple sensors, comprehensively analyzing parameters such as voltage, current, and temperature to achieve more accurate power level determination and charging control.

[0088] Therefore, by monitoring and intelligently judging the power status of the energy storage device in real time, the energy control unit can effectively avoid overcharging or undercharging of the energy storage device, ensuring the normal operation of the electric vehicle and preventing overcharging when the power is sufficient. Thus, this application, through the intelligent control of the energy control unit, significantly improves energy utilization efficiency, extends the service life of the energy storage device, and enhances the driving range and user experience of the electric vehicle.

[0089] The electric vehicle charging system provided by this invention can directly charge the battery and supply power to the vehicle's low-voltage equipment. It can also operate the external discharge switch through the body control unit to send the external discharge signal to the energy control unit. The energy control unit controls the conduction of the charging and discharging circuit according to the charging and discharging strategy, and converts the high-voltage DC power to AC 220V output through a corresponding converter. It can connect to the AC charging port to meet the low-power power demand, improve the user experience, and reduce the energy consumption of the power battery.

[0090] In addition, the energy control unit in this embodiment of the invention can integrate intelligent control algorithms and monitoring technology, so as to realize comprehensive monitoring and management of the vehicle system, charge the power battery and supply power to low-voltage components, and control the system components in an orderly and precise manner. At the same time, it can also monitor the system status in real time, so as to issue a timely warning when a component fails.

[0091] As shown in Figure 2, this embodiment of the invention also provides an electric vehicle charging method, applied to the electric vehicle charging system of any of the above embodiments of this application, specifically including:

[0092] S11: The vehicle body control unit controls the operating status of the solar power generation device according to the vehicle status and environmental conditions;

[0093] S12: The solar power generation device starts working under the control of the vehicle control unit, converting solar energy into electrical energy;

[0094] S13: The energy control unit uses the electrical energy converted from solar energy to charge the energy storage device;

[0095] S14: Energy storage device stores received electrical energy.

[0096] The vehicle body control unit controls the operation of the solar power generation device based on the vehicle status and environmental conditions to ensure that power generation occurs under suitable conditions. Under the control of the vehicle body control unit, the solar power generation device converts solar energy into electrical energy, providing a clean energy source. The energy control unit is responsible for using the converted electrical energy to charge the energy storage device, ensuring the effective storage of electrical energy. The energy storage device stores the received electrical energy, ensuring that the vehicle can use this electrical energy when needed.

[0097] This method allows electric vehicles to be charged using solar energy even in remote areas or other places where timely charging is not possible. It solves the problem of electric vehicles not being able to charge in remote areas, alleviates consumers' range anxiety and charging anxiety, and promotes the adoption and use of electric vehicles.

[0098] Furthermore, the vehicle control unit can acquire information about vehicle status and environmental conditions through various sensors. For example, vehicle status can include battery level and vehicle location, while environmental conditions can include sunlight intensity and weather conditions. The solar power generation device can utilize high-efficiency solar panels to improve solar energy conversion efficiency. The energy control unit can integrate various power electronic devices to achieve precise control of the charging process. The energy storage device can employ high-energy-density batteries to enhance energy storage capacity.

[0099] In a preferred embodiment, the vehicle body control unit can further dynamically adjust the angle of the solar power generation device based on sunlight intensity and vehicle position to maximize solar energy utilization efficiency. The energy control unit may include multi-stage converters to effectively manage electrical energy at different voltage levels. The energy storage device can be modularly designed for ease of maintenance and replacement.

[0100] This application achieves self-charging capability for electric vehicles in remote areas by employing a combination of solar power generation devices, energy control units, and energy storage devices. Compared with existing technologies, this application effectively solves the problem of electric vehicles being unable to charge in remote areas in a timely manner, providing a clean and renewable energy source and reducing dependence on traditional power grids.

[0101] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electric vehicle charging system, characterized in that, This includes solar power generation devices, energy control units, energy storage devices, and vehicle body control units; among which: The vehicle body control unit is used to control the operating status of the solar power generation device according to the vehicle status and environmental conditions. The solar power generation device is used to convert solar energy into electrical energy during operation; The energy control unit is used to charge the energy storage device using electrical energy converted from solar energy. The energy storage device is used to store electrical energy.

2. The electric vehicle charging system of claim 1, wherein, It also includes the power generation controller; The power generation controller is connected to the solar power generation device and is used to output a power generation signal to the energy control unit when the solar power generation device is working, so that the energy control unit can realize the charging function.

3. The electric vehicle charging system of claim 2, wherein, It also includes DC / DC converters; wherein: The energy control unit is also used to control the conduction of the corresponding high-voltage circuit so as to transmit the electrical energy converted from solar energy to the DC / DC converter. The DC / DC converter is used to convert the received electrical energy into low-voltage DC power to output low-voltage power to the vehicle.

4. The electric vehicle charging system of claim 3, wherein, It also includes a DC / AC converter; wherein: The vehicle body control unit is also used to output an external discharge signal to the energy control unit; The energy control unit is also used to control the conduction of the corresponding charging and discharging circuits to transmit the electrical energy converted from solar energy to the DC / AC converter. The DC / AC converter is used to convert received electrical energy into high-voltage AC power and provide high-voltage AC power charging function through a corresponding interface.

5. The electric vehicle charging system according to any one of claims 1 to 4, characterized in that, The solar power generation device includes a double-layer solar panel adapted to the shape of the vehicle roof. The lower solar panel is fixedly installed on the vehicle roof, and the upper solar panel is retractable and installed on top of the lower solar panel. When retracted, it covers the lower solar panel, and when extended, it forms a larger solar panel with the lower solar panel.

6. The electric vehicle charging system of claim 5, wherein, It also includes a light sensor and an ultrasonic radar installed around the upper solar panel; wherein: The light sensor is used to collect light information; The ultrasonic radar is used to detect surrounding obstacles and obtain obstacle information; The vehicle body control unit is also used to control the upper solar panel to retract or extend based on the illumination information and the obstacle information.

7. The electric vehicle charging system of claim 6, wherein, The vehicle body control unit is also used to automatically adjust the angle of the double-layer solar panel so that the double-layer solar panel is perpendicular to the sunlight.

8. The electric vehicle charging system according to claim 7, characterized in that, The double-layer solar panel is a solar panel made of spectrally selective material. The vehicle control unit is also used to determine the optimal spectral response that maximizes the energy conversion efficiency of the double-layer solar panel based on the illumination information and the spectrally selective material, determine the target voltage based on the optimal spectral response, and apply the target voltage to the double-layer solar panel.

9. The electric vehicle charging system according to claim 8, characterized in that, The energy control unit is specifically used to determine whether the energy storage device has reached the charging condition. If it has, the energy storage device is charged; otherwise, it is determined that the energy storage device does not need to be charged.

10. An electric vehicle charging method, characterized by, The method, applied to an electric vehicle charging system as described in any one of claims 1 to 9, comprises: The vehicle body control unit controls the operating status of the solar power generation device based on the vehicle status and environmental conditions; The solar power generation device starts working under the control of the vehicle body control unit, converting solar energy into electrical energy; The energy control unit uses the electrical energy converted from solar energy to charge the energy storage device; The energy storage device stores the received electrical energy.

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