Electric vehicle charging system and method

Abstract

The invention relates to an electric vehicle charging system and method in the technical field of electric vehicle charging, and the system comprises a vehicle body control unit which is used for controlling the working state of a solar power generation device according to the vehicle state and the environment condition; the solar power generation device is used for converting solar energy into electric energy during working; the energy control unit is used for charging the energy storage device by utilizing electric energy obtained by converting solar energy; and the energy storage device is used for storing electric energy. Therefore, dependence of the electric vehicle on traditional charging facilities can be reduced, especially in remote areas, solar charging provides an extra electric quantity supplementing mode, and the problem that charging facilities are insufficient is solved; meanwhile, solar charging serves as a sustainable energy source, the endurance mileage of the vehicle is prolonged, the charging frequency is reduced, the charging time is shortened, and therefore the mileage and charging anxiety of a user are effectively relieved, and the use convenience and the popularization potential of the electric vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging, and in particular to an electric vehicle charging system and method. Background Art

[0002] With the progress and development of science, environmental and energy issues have become the focus, and electric vehicles have come into being. However, traditional electric vehicles only use power batteries as a power source, and this design has many limitations; first, the battery capacity is limited and cannot meet the needs of long-distance driving; second, the charging time is long, which greatly reduces the efficiency of vehicle use. What is more serious is that in remote areas, due to imperfect charging facilities, car owners may not be able to replenish the battery of the vehicle in time, which directly affects the normal driving of the vehicle, resulting in widespread mileage and charging anxiety among consumers, affecting the promotion and use of electric vehicles. In view of the above problems, the existing technology needs to be improved urgently. Summary of the invention

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

[0004] The present 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 working state of the solar power generation device according to the vehicle state and environmental conditions;

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

[0008] The energy control unit is used to charge the energy storage device using the electric 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, a DC / DC converter is also included; wherein:

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

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

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

[0016] The vehicle body control unit is further 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 electric energy converted from solar energy to the DC / AC converter;

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

[0019] Preferably, the solar power generation device includes a double-layer solar panel adapted to the shape of the roof, wherein the lower solar panel of the double-layer solar panel is fixedly mounted on the roof, and the upper solar panel of the double-layer solar panel is retractably mounted on the lower solar panel, covering the lower solar panel when retracted, and forming a solar panel with a larger area together with the lower solar panel when extended.

[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 further used to control the upper solar cell 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 spectrally selective materials, and the vehicle body control unit is further used to determine, based on the illumination information and the spectrally selective materials, an optimal spectral response for maximizing energy conversion efficiency of the double-layer solar panel, 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 power level of the energy storage device reaches the charging condition, and if so, the energy storage device is charged; otherwise, it is determined that there is no need to charge the energy storage device.

[0027] A method for charging an electric vehicle, characterized in that it is applied to the electric vehicle charging system as described in any one of the above items, and the method comprises:

[0028] The body control unit controls the working state of the solar power generation device according to the vehicle state and environmental conditions;

[0029] The solar power generation device starts to work under the control of the vehicle body control unit to convert solar energy into electrical energy;

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

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

[0032] In the scheme of the present invention, the vehicle body control unit controls the working state of the solar power generation device according to the vehicle state and environmental conditions. The solar power generation device converts solar energy into electrical energy, and the energy control unit uses this electrical energy to charge the energy storage device. This can reduce the dependence of electric vehicles on traditional charging facilities. Especially in remote areas, solar charging provides an additional way to supplement power and alleviates the problem of insufficient charging facilities. At the same time, solar charging, as a sustainable energy source, extends the vehicle's cruising range, reduces charging frequency and charging time, thereby effectively alleviating users' mileage and charging anxiety, and improving the convenience of use and promotion potential of electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0035] Figure 2 is a flow chart of an electric vehicle charging method provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1 , which shows a schematic structural diagram of an electric vehicle charging system provided by 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 working state of the solar power generation device 11 according to the vehicle state and environmental conditions;

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

[0040] An energy control unit 12 is used to charge an energy storage device 13 using electric energy converted from solar energy;

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

[0042] A solar power generation device refers to a device that can convert solar energy into electrical energy, and usually includes solar panels, such as flexible solar panels. An energy control unit refers to a device used to manage and control the flow of energy, which can ensure that electrical energy can be effectively transmitted and stored. An energy storage device is a device used to store electrical energy, and usually includes a power battery, such as a lithium-ion battery, a nickel-metal hydride battery, etc. A body control unit refers to a device used to manage and control various parts of a vehicle, including the ability to automatically adjust the working state of a solar power generation device according to the vehicle status and environmental conditions, to ensure that the vehicle can operate normally. In addition, when the solar panel is a flexible solar panel, the control of the solar panel operation can be to unfold the flexible solar panel.

[0043] The body control unit can control the solar power generation device to work according to the vehicle status and environmental conditions. When it is determined that it is currently suitable to use solar energy for charging, the body control unit controls the solar power generation device to work. Otherwise, the body control unit controls the solar power generation device not to work. When the solar power generation device works under the control of the body control unit, it converts 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. Thus, the electric vehicle can be charged using solar energy.

[0044] It should be noted that the body control unit determines whether it is suitable to use solar energy for charging according to the vehicle state and environmental conditions. If the light is suitable and the vehicle is safe to use, it can be considered that it is suitable to use solar energy for charging. Otherwise, it is considered that it is not suitable to use solar energy for charging. Among them, suitable light can include strong light intensity, that is, it reaches the corresponding intensity threshold; vehicle safety can include the vehicle being in a parking state or a stable driving state; of course, other settings can be made according to actual needs, all of which are within the protection scope of the present invention.

[0045] In the scheme of the present invention, the vehicle body control unit controls the working state of the solar power generation device according to the vehicle state and environmental conditions. The solar power generation device converts solar energy into electrical energy, and the energy control unit uses this electrical energy to charge the energy storage device. This can reduce the dependence of electric vehicles on traditional charging facilities. Especially in remote areas, solar charging provides an additional way to supplement power and alleviates the problem of insufficient charging facilities. At the same time, solar charging, as a sustainable energy source, extends the vehicle's cruising range, reduces charging frequency and charging time, thereby effectively alleviating users' mileage and charging anxiety, and improving the convenience of use and promotion potential of electric vehicles.

[0046] An electric vehicle charging system provided by an embodiment of the present invention may also include a 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.

[0047] The power generation controller (when the solar power generation device is a solar panel, the power generation controller can be a photovoltaic controller) outputs a power generation signal to the energy control unit when the solar power generation device is working, ensuring that the energy control unit can respond to the signal to realize the charging function.

[0048] The power generation controller can be implemented in a variety of ways. For example, the power generation controller can include a microprocessor for processing signals from the solar power generation device and generating corresponding power generation signals. The power generation controller can also include a communication module for communicating with the energy control unit to ensure that the power generation signal can be transmitted in a timely manner. As a preferred embodiment, the power generation controller can also include a power management module for managing and adjusting the output voltage and current of the power generation signal to adapt to different energy control unit requirements.

[0049] This application introduces a power generation controller, which can output a power generation signal to the energy control unit in real time when the solar power generation device is working, thereby ensuring that the energy control unit can realize the charging function in time. Compared with the prior art, this application provides a more reliable and efficient solution, which can effectively improve the charging efficiency and convenience of electric vehicles, solve the problem that traditional electric vehicles cannot be charged in time in remote areas, and reduce consumers' mileage and charging anxiety.

[0050] An electric vehicle charging system provided by an embodiment of the present 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 circuit to transmit the electric energy converted from solar energy to the DC / DC converter;

[0052] The DC / DC converter is used to convert the received electrical energy into low-voltage DC power and output low-voltage power for the entire vehicle.

[0053] The function of the energy control unit in the embodiment of the present invention is to control the conduction of the high-voltage circuit and transmit the electric energy converted from solar energy to the DC / DC converter; the function of the DC / DC converter is to convert the received high-voltage electric energy into low-voltage DC power and provide low-voltage power for the whole vehicle. Therefore, through the cooperation of the energy control unit and the DC / DC converter, the electric energy converted from solar energy can be efficiently transmitted and converted into low-voltage DC power, thereby realizing efficient electric energy utilization.

[0054] Specifically, the energy control unit can receive the wake-up signal of the power generation controller and control the conduction of the high-voltage circuit according to the pre-set charging and discharging strategy to realize the transmission of the electric energy obtained by solar energy conversion; the DC / DC converter can adopt high-efficiency conversion technology, such as synchronous rectification technology, etc., to convert the obtained electric energy (high-voltage DC) into low-voltage DC (such as 12V low-voltage electricity) to improve the efficiency of electric energy conversion. As a preferred embodiment, the DC / DC converter can include a multi-stage conversion circuit, which processes the electric energy in stages, optimizes the voltage and current matching of each stage, reduces energy loss, and suppresses voltage fluctuations through inter-stage filtering and voltage stabilization design, thereby improving the overall conversion efficiency and stability. The cooperation between the energy control unit and the DC / DC converter can achieve efficient electric energy transmission and conversion through reasonable circuit design and control strategy.

[0055] In addition, when the solar power generation device is not working, the vehicle's starting self-reset switch can be used to control the high-voltage circuit to be connected, and the DC / DC converter can convert the high-voltage electricity output by the energy storage device into low-voltage electricity, thereby realizing the normal power supply of the low-voltage system of the entire vehicle and realizing the auxiliary function of the low-voltage battery.

[0056] It can be seen that this application realizes the efficient transmission and conversion of electric energy obtained from solar energy conversion by introducing an energy control unit and a DC / DC converter, and solves the problems of low power transmission efficiency and unstable conversion in the prior art. At the same time, this application can provide a stable low-voltage power supply for the whole vehicle, eliminate the low-voltage auxiliary battery, reduce the weight of the whole vehicle, improve the energy utilization rate of the whole vehicle, and facilitate the layout of the whole vehicle, reducing the cost of the whole vehicle. Therefore, in this way, this application not only improves the efficiency of electric energy utilization, but also optimizes the power system configuration of the whole vehicle.

[0057] An electric vehicle charging system provided by an embodiment of the present invention may further include a DC / AC converter; wherein:

[0058] The body control unit is also used to output an external discharge signal 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 electric energy converted from solar energy to the DC / AC converter;

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

[0061] In the embodiment of the present invention, the vehicle body control unit is responsible for outputting the external discharge signal, and the energy control unit controls the charging and discharging circuit to conduct, and transmits the electric energy converted from solar energy to the DC / AC converter, and the DC / AC converter converts the electric energy into high-voltage AC. In this way, the high-voltage AC charging function can be provided to external devices through the corresponding interface, and the electric energy converted from solar energy can be efficiently provided to external devices.

[0062] Specifically, the body control unit can detect the vehicle status and environmental conditions through sensors, and decide whether to operate the external discharge switch to output an external discharge signal; after receiving the signal, the energy control unit controls the charging and discharging circuit to be turned on according to the preset charging and discharging strategy, and transmits the electric energy converted from solar energy to the DC / AC converter; after receiving the electric energy, the DC / AC converter converts the DC power into high-voltage AC power (220V voltage) through the internal circuit, and outputs it through the corresponding interface. This method can not only power the internal equipment of the vehicle, but also provide power support for other equipment through the external interface, meet the small power demand, improve the user experience, and reduce the energy consumption of the power battery.

[0063] Therefore, the embodiment of the present invention realizes the function of converting solar power into high-voltage AC power by adding a DC / AC converter, meets the charging needs of external devices, provides utilization of solar power, reduces the energy consumption of the energy storage device, improves user experience, solves the problem that electric vehicles cannot be charged in time in remote areas, and further promotes the promotion and application of electric vehicles.

[0064] It should also be noted that the charging and discharging strategy involved in the embodiments of the present invention may be any relevant strategy in the prior art, or may be other strategies set according to actual needs; in actual applications, the electric energy obtained by solar energy conversion (excluding the electric energy already stored in the energy storage device) may be used in sequence according to the priority order of charging the energy storage device, providing the low-voltage power supply of the whole vehicle, and outputting high-voltage AC power. For example, when the energy storage device does not need to be charged, the low-voltage power supply of the whole vehicle and the high-voltage AC power output are provided. When the energy storage device does not need to be charged and the low-voltage power supply of the whole vehicle does not need to be provided, the high-voltage AC power is output, thereby realizing the use of the electric energy obtained by solar energy conversion in descending order of importance.

[0065] In an electric vehicle charging system provided by an embodiment of the present invention, a solar power generation device may include a double-layer solar panel adapted to the shape of a roof, wherein a lower solar panel of the double-layer solar panel is fixedly mounted on the roof, and an upper solar panel of the double-layer solar panel is retractably mounted on top of the lower solar panel, covering the lower solar panel when retracted, and forming a solar panel of a larger area together with the lower solar panel when extended.

[0066] In an embodiment, the upper solar panel in the double-layer solar panel can achieve a telescopic function through an electric telescopic mechanism. Specifically, the upper solar panel can be controlled by an electric slide rail or a hydraulic system so that it can automatically extend or retract as needed; after the upper solar panel is extended, it is combined 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, and after retracting, it covers the lower solar panel, and the total effective power generation area is the effective power generation area of ​​the upper solar panel. In addition, the solar panel is adapted to the shape of the roof to improve its compatibility with the vehicle, and the surface of the solar panel can also be made of waterproof and dustproof materials to improve its durability and service life.

[0067] This embodiment is provided with a double-layer solar panel. The lower solar panel is fixed on the roof to ensure stability and basic power generation function. The upper solar panel can be retracted and installed on the lower solar panel, providing the function of expanding the area of ​​the solar panel, thereby significantly increasing the effective power generation area of ​​the solar panel without increasing the roof area, and improving the efficiency of solar power generation; at the same time, the retractable design allows the upper solar panel to be retracted when not needed, protecting the lower solar panel and reducing wind resistance. Therefore, through the technical solution of this embodiment, electric vehicles can use solar energy for charging more effectively, alleviating the mileage and charging anxiety of electric vehicles.

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

[0069] Light sensor, used to collect light information;

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

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

[0072] The light sensor can be installed on the roof to collect light information; the ultrasonic radar can be installed around the upper solar panel (such as the front end) to detect surrounding obstacle information; the body control unit controls the extension and retraction of the upper solar panel based on this information. The extension and retraction of the upper solar panel can be automatically controlled by the body control unit according to the signals of the light sensor and ultrasonic radar to ensure that it is deployed under the best light conditions and retracted in time when an obstacle is detected to avoid collision.

[0073] Specifically, the light sensor can be implemented using common components such as photoresistors and photodiodes on the market. These components can monitor the light intensity in real time and transmit data to the body control unit. Ultrasonic radar can use a combination of ultrasonic transmitters and receivers to detect the distance and position of surrounding obstacles by emitting ultrasonic waves and receiving reflected waves. The installation location of these sensors should be avoided as much as possible to ensure the accuracy of the data. The body control unit can process the light information and obstacle information, and then control the extension and retraction of the upper solar cells based on the light information and obstacle information. For example, if the current light intensity is insufficient and there are no obstacles around, the upper solar panel can be controlled to extend to effectively increase the effective power generation area.

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

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

[0076] The body control unit adjusts the angle of the solar panel according to the direction of the sunlight, so that it always remains in the optimal position, thereby improving the efficiency of electricity generation; as a result, electric vehicles can achieve higher energy conversion efficiency during the charging process, reduce charging time, and improve endurance.

[0077] Specifically, the body control unit can realize automatic adjustment of the angle of the double-layer solar panel in a variety of ways. For example, the body control unit can combine the light information collected by the light sensor to calculate the direction of the sun's rays in real time, and adjust the angle of the solar panel accordingly so that the power generation surface is perpendicular to the sun's rays; as a preferred embodiment, the body control unit can realize precise adjustment of the angle of the solar panel through an electric motor or a hydraulic system. In addition, the body control unit can also use the ultrasonic radar installed around the upper solar panel to detect the surrounding obstacle information in real time to ensure safety during the adjustment process.

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

[0079] The power generation surface of the double-layer solar panel can all use spectrally selective materials, which can selectively absorb light of a specific spectrum. By introducing spectrally selective materials, the solar panel can automatically adjust the absorption efficiency of light of different wavelengths according to the lighting conditions, such as enhancing the absorption of blue light on cloudy days and enhancing the absorption of red light on sunny days, thereby improving energy conversion efficiency. The body control unit determines the optimal spectral response by collecting lighting information and combining the characteristics of spectrally selective materials, and then determines the target voltage based on the optimal spectral response and applies the target voltage to the double-layer solar panel. Based on this, the system can automatically adjust the working state of the solar panel under different lighting conditions to ensure that it is always at the optimal energy conversion efficiency, thereby effectively solving the problem of how to improve the energy conversion efficiency of solar panels.

[0080] The advantage of spectrally selective materials is that they can selectively absorb light of specific wavelengths, thereby maximizing the use of solar energy. Specifically, the body control unit first collects the current light information, combines the characteristics of the spectrally selective material, calculates the optimal spectral response that can achieve maximum energy conversion efficiency under current conditions, and based on this optimal spectral response, further determines the corresponding target voltage and applies it to the double-layer solar panel.

[0081] This process can be achieved in the following ways: first, a spectrum 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 corresponding relationships between spectral responses and target voltages can be pre-set, and the body control unit selects the most suitable response and voltage combination according to the current lighting conditions. As a preferred embodiment, the body control unit can continuously adjust the target voltage through a feedback mechanism to cope with the dynamic changes in lighting conditions.

[0082] The above process can also be achieved in another way: light condition monitoring collects a large amount of light condition (which may include light intensity, spectral distribution, ambient temperature) and spectral response (which may include absorption peak wavelength and absorptivity) data as a training set, uses machine learning algorithms such as neural networks and support vector machines, trains the model based on the training set, and inputs the light condition into the model to predict the corresponding optimal spectral response when necessary; after obtaining the optimal spectral response, the target voltage is obtained according to the following formula:

[0083]

[0084] Among them, V target represents the target voltage, h represents Planck's constant, c represents the speed of light, and λ target represents the absorption peak wavelength in the optimal spectral response, represents the initial energy band (the energy band width of the spectrally selective material when no voltage is applied), and α represents the electrochromic coefficient (the energy band change caused by unit voltage).

[0085] The present application realizes automatic optimization of the energy conversion efficiency of the solar panel under different lighting conditions by adopting a double-layer solar panel made of spectrally selective materials and combining it with the intelligent adjustment function of the vehicle body control unit; therefore, the technical solution of the present 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.

[0086] In an electric vehicle charging system provided by an embodiment of the present invention, an energy control unit is specifically used to determine whether the power of an energy storage device meets the charging condition. If so, the energy storage device is charged; otherwise, it is determined that there is no need to charge the energy storage device.

[0087] The energy control unit is used to detect the power status of the energy storage device and decide whether to charge by judging whether the power reaches the charging condition. This ensures that the energy storage device is charged in time when the power is lower than the predetermined level, thereby avoiding the situation of insufficient power. At the same time, it avoids unnecessary charging operations when the power is sufficient, thereby improving the efficiency of electric energy utilization. This judgment and control mechanism can effectively solve the problem of whether the energy storage device needs to be charged through real-time monitoring and intelligent judgment of the power of the energy storage device, and ensure the normal operation of the electric vehicle.

[0088] Furthermore, the energy control unit can realize the judgment of the power of the energy storage device in a variety of ways. For example, the voltage level of the energy storage device can be monitored in real time by a voltage sensor, and the charging operation is triggered when the voltage is lower than the preset value; the charging and discharging current of the energy storage device can also be monitored by a current sensor, and the power state of the energy storage device can be judged according to the current change. In addition, the energy control unit can also monitor the temperature of the energy storage device in combination with the data of the temperature sensor to ensure that the charging operation is performed within a safe temperature range. As a preferred embodiment, the energy control unit can integrate multiple sensor data and realize more accurate power judgment and charging control by comprehensively analyzing parameters such as voltage, current and temperature.

[0089] Therefore, the energy control unit can effectively avoid overcharging or insufficient power of the energy storage device by real-time monitoring and intelligently judging the power status of the energy storage device, ensuring the normal operation of the electric vehicle and avoiding overcharging when the power is sufficient. Therefore, the application significantly improves the efficiency of electric energy utilization, extends the service life of the energy storage device, and improves the endurance and user experience of the electric vehicle through the intelligent control of the energy control unit.

[0090] The electric vehicle charging system provided by the present invention can directly charge the battery and power the low-voltage equipment of the whole vehicle. 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 direct current into an alternating current of 220V output through the corresponding converter. The device can be connected 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.

[0091] In addition, the energy control unit in the embodiment of the present invention can integrate intelligent control algorithms and monitoring technologies to achieve comprehensive monitoring and management of the vehicle system, charge the power battery and power the low-voltage components, and can control the system components in an orderly and precise manner. At the same time, it can also monitor the system status in real time, thereby being able to issue a timely warning when a component fails.

[0092] like Figure 2 As shown, an embodiment of the present invention further provides an electric vehicle charging method, which is applied to an electric vehicle charging system as in any one of the above embodiments of the present application, and specifically may include:

[0093] S11: The vehicle body control unit controls the working state of the solar power generation device according to the vehicle state and environmental conditions;

[0094] S12: The solar power generation device starts to work under the control of the vehicle body control unit, converting solar energy into electrical energy;

[0095] S13: The energy control unit uses the electric energy converted from solar energy to charge the energy storage device;

[0096] S14: The energy storage device stores the received electrical energy.

[0097] The body control unit controls the working state of the solar power generation device according to the vehicle status and environmental conditions to ensure power generation under appropriate conditions; the solar power generation device converts solar energy into electrical energy under the control of the body control unit to provide a clean energy source; the energy control unit is responsible for using the converted electrical energy to charge the energy storage device to ensure effective storage of electrical energy; the energy storage device stores the received electrical energy to ensure that the vehicle can use this electrical energy when needed.

[0098] Through this method, electric vehicles can still use solar energy to charge in remote areas or other situations where they cannot be charged in time, solving the problem of electric vehicles being unable to charge in time in remote areas, alleviating consumers' mileage and charging anxiety, and promoting the promotion and use of electric vehicles.

[0099] Furthermore, the vehicle body control unit can obtain information about the vehicle status and environmental conditions through a variety of sensors. For example, the vehicle status may include information such as battery power and vehicle location, and the environmental conditions may include information such as light intensity and weather conditions. The solar power generation device can use high-efficiency solar panels to improve the efficiency of solar energy conversion. The energy control unit can integrate a variety of power electronic devices to achieve precise control of the charging process. The energy storage device can use a high-energy density battery to improve the storage capacity of electrical energy.

[0100] As a preferred embodiment, the vehicle body control unit can further dynamically adjust the angle of the solar power generation device based on the light intensity and the vehicle position to maximize the utilization efficiency of solar energy. The energy control unit can include a multi-level converter to achieve effective management of electric energy of different voltage levels. The energy storage device can adopt a modular design to facilitate maintenance and replacement.

[0101] This application realizes the self-charging function of electric vehicles in remote areas by using a combination of solar power generation devices, energy control units and energy storage devices. Compared with the prior art, this application can effectively solve the problem that electric vehicles cannot be charged in time in remote areas, provides a clean and renewable energy source, and reduces dependence on traditional power grids.

[0102] For detailed descriptions of the electronic lesson preparation platform, device, and storage medium provided by the embodiments of the present invention, please refer to the corresponding parts of the electronic lesson preparation method embodiment described above. Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the attached claims.

Claims

1. An electric vehicle charging system, characterized in that: It includes a solar power generation device, an energy control unit, an energy storage device and a vehicle body control unit; wherein: The vehicle body control unit is used to control the working state of the solar power generation device according to the vehicle state and environmental conditions; The solar power generation device is used to convert solar energy into electrical energy when in operation; The energy control unit is used to charge the energy storage device using the electric energy converted from solar energy; The energy storage device is used to store electrical energy.

2. The electric vehicle charging system according to claim 1, characterized in that: Also included is a 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 according to claim 2, characterized in that: Also included is a DC / DC converter; wherein: The energy control unit is also used to control the conduction of the corresponding high-voltage circuit to transmit the electric energy converted from solar energy to the DC / DC converter; The DC / DC converter is used to convert the received electric energy into low-voltage DC power and output low-voltage power for the whole vehicle.

4. The electric vehicle charging system according to claim 3, characterized in that: Also includes a DC / AC converter; wherein: The vehicle body control unit is further 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 electric energy converted from solar energy to the DC / AC converter; The DC / AC converter is used to convert the received electric energy into high-voltage AC power and provide a charging function of the high-voltage AC power 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 cell panel adapted to the shape of the roof, wherein the lower solar cell panel of the double-layer solar cell panel is fixedly installed on the roof, and the upper solar cell panel of the double-layer solar cell panel is retractably installed on the lower solar cell panel, covering the lower solar cell panel when retracted, and forming a solar cell panel with a larger area together with the lower solar cell panel when extended.

6. The electric vehicle charging system according to claim 5, characterized in that: 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 further used to control the upper solar cell panel to retract or extend based on the illumination information and the obstacle information.

7. The electric vehicle charging system according to claim 6, characterized in that: 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 materials. The vehicle body control unit is further used to determine, based on the illumination information and the spectrally selective materials, an optimal spectral response for maximizing energy conversion efficiency of the double-layer solar panel, determine a 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 power of the energy storage device reaches the charging condition. If so, the energy storage device is charged; otherwise, it is determined that there is no need to charge the energy storage device.

10. A method for charging an electric vehicle, characterized in that: Applied to an electric vehicle charging system according to any one of claims 1 to 9, the method comprises: The body control unit controls the working state of the solar power generation device according to the vehicle state and environmental conditions; The solar power generation device starts to work under the control of the vehicle body control unit to convert solar energy into electrical energy; The energy control unit uses the electric energy converted from solar energy to charge the energy storage device; The energy storage device stores the received electrical energy.

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