Photovoltaic power generation device, new energy vehicle and control method, equipment and medium thereof

Abstract

The application discloses a photovoltaic power generation device, a new energy vehicle and a control method, equipment and a medium thereof, and relates to the technical field of new energy vehicles.The photovoltaic power generation device comprises a photoelectric conversion module, a photovoltaic controller, a storage battery and a direct current converter which are electrically connected in sequence.The photoelectric conversion module is used for converting light energy into electric energy.The photovoltaic controller is used for supplying power to the heating load and the low-voltage load of the new energy vehicle by the electric energy output by the photoelectric conversion module.The storage battery is used for storing the electric energy output by the photoelectric conversion module after the current power generation power of the photoelectric conversion module is higher than the first demand power of the heating load and the low-voltage load.The direct current converter is used for performing voltage boosting processing on the electric energy output by the photoelectric conversion module to supply power to the high-voltage circuit of the new energy vehicle under a preset high-voltage power supply condition.The application solves the technical problem of low electric energy utilization rate of the existing photovoltaic power generation device.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a photovoltaic power generation device, a new energy vehicle and its control method, equipment and medium. Background Technology

[0002] With the rapid development of new energy vehicle technology, the range of new energy vehicles has become a key concern. To improve the range of new energy vehicles, photovoltaic power generation devices can be added to them.

[0003] Currently, vehicles equipped with photovoltaic (PV) power generation devices typically use these devices to convert solar energy into electrical energy to charge the vehicle's battery. However, the electricity generated by PV devices is low-voltage and needs to be boosted before it can charge the vehicle's high-voltage battery. Then, when the battery supplies power to low-voltage loads, it needs to be stepped down, resulting in significant energy loss. This leads to low utilization of the PV power generated by these devices, resulting in a waste of PV power. Summary of the Invention

[0004] The main purpose of this application is to provide a photovoltaic power generation device, a new energy vehicle and its control method, equipment and medium, which aims to solve the technical problem of low power utilization rate of existing photovoltaic power generation devices.

[0005] To achieve the above objectives, in a first aspect, this application provides a photovoltaic power generation device for use in new energy vehicles, the photovoltaic power generation device comprising: a photoelectric conversion module, a photovoltaic controller, a battery, and a DC converter connected in sequence;

[0006] Photoelectric conversion module, used to convert light energy into electrical energy;

[0007] A photovoltaic controller is used to supply power to the heating load and low-voltage load of the new energy vehicle through the electrical energy output from the photoelectric conversion module;

[0008] A storage battery is used to store the electrical energy output by the photoelectric conversion module after the current power generation of the photoelectric conversion module exceeds the first power demand of the heating load and the low-voltage load.

[0009] A DC-DC converter is used to boost the electrical energy output from the photoelectric conversion module to power the high-voltage circuit of the new energy vehicle under preset high-voltage power supply conditions.

[0010] According to the first aspect, the heating load is connected in series at the water inlet end of the cooling circuit of the new energy vehicle.

[0011] According to the first aspect, or any implementation of the first aspect above, the photovoltaic power generation device further includes: a power distribution unit;

[0012] One end of the power distribution unit is electrically connected to the DC-DC converter, and the other end is electrically connected to the power battery in the high-voltage circuit of the vehicle.

[0013] Secondly, this application also provides a new energy vehicle, which includes a photovoltaic power generation device as described in any of the preceding claims.

[0014] Thirdly, this application provides a control method for a new energy vehicle, applied to the new energy vehicle described above, the control method for the new energy vehicle comprising:

[0015] The photovoltaic power generation device provides energy to the heating load and / or the low-voltage load.

[0016] After the current power generation of the photovoltaic power generation device exceeds the first required power of the heating load and the low-voltage load, the battery of the photovoltaic power generation device is charged based on the photovoltaic power generation device;

[0017] After the power battery in the storage battery and the high voltage circuit of the vehicle meets the preset high voltage power supply conditions, the photovoltaic power generation device supplies power to the power battery through the DC converter.

[0018] According to the third aspect, before the step of supplying power to the power battery via the DC converter based on the photovoltaic power generation device after the storage battery and the power battery in the vehicle high-voltage circuit meet the preset high-voltage power supply conditions, the method includes:

[0019] Obtain the current voltage of the storage battery and the allowable charging power of the power battery;

[0020] When the current voltage of the battery is higher than a first preset voltage threshold and the allowable charging power is higher than a first preset power threshold, it is determined that the battery and the power battery meet the preset high-voltage power supply conditions.

[0021] According to the third aspect, or any implementation of the third aspect above, after the power battery in the storage battery and the high-voltage circuit of the vehicle meets the preset high-voltage power supply conditions, the step of supplying power to the power battery through the DC converter based on the photovoltaic power generation device includes:

[0022] When the current voltage of the battery is lower than the second preset voltage threshold, or the allowable charging power is lower than the second preset power threshold, the DC-DC converter is controlled to stop working.

[0023] The photovoltaic power generation device is used to charge the storage battery.

[0024] According to the third aspect, or any implementation of the third aspect above, in the step of providing low-voltage power supply to the heating load and the low-voltage load based on the photovoltaic power generation device, the control method further includes:

[0025] Obtain the inlet and outlet water temperatures of the power battery;

[0026] The heating load is activated after the inlet water temperature falls below a preset water temperature threshold.

[0027] Once the outlet water temperature is not lower than the preset water temperature threshold, the heating load is turned off.

[0028] Fourthly, this application provides a control device for a new energy vehicle, the control device for the new energy vehicle comprising: a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the computer program is configured to implement the steps of the control method for the new energy vehicle as described above.

[0029] Fifthly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform a control method for a new energy vehicle as described in any one of the first aspects or possible implementations thereof.

[0030] In a sixth aspect, embodiments of this application provide a computer program that includes instructions for executing the control method for a new energy vehicle in the first aspect and any possible implementation thereof.

[0031] This application proposes a photovoltaic power generation device, a new energy vehicle, and its control method, equipment, and medium. The photovoltaic power generation device includes: a photoelectric conversion module, a photovoltaic controller, a storage battery, and a DC-DC converter connected in sequence. The photoelectric conversion module is used to convert light energy into electrical energy. The photovoltaic controller is used to supply power to the heating load and low-voltage load of the new energy vehicle through the electrical energy output by the photoelectric conversion module. Therefore, in this application, on the one hand, the low-voltage electricity generated by the photovoltaic power generation device directly powers the heating load and low-voltage load, avoiding the energy loss caused by the photovoltaic power supply strategy of first boosting the low-voltage electricity generated by the photovoltaic power generation device to charge the power battery, and then stepping down the voltage of the power battery to power the heating load and low-voltage load, thus improving the energy utilization rate of the photovoltaic power generation device. On the other hand, heating the power battery through the heating load also avoids the poor charging and discharging performance of the power battery at low temperatures, ensuring the charging and discharging performance of the power battery. The storage battery is used to store the electrical energy output by the photoelectric conversion module after the current power generation of the photoelectric conversion module exceeds the first power demand of the heating load and the low-voltage load. Therefore, excess electrical energy after the current power generation of the photoelectric conversion module exceeds the first power demand of the heating load and the low-voltage load can be stored in the battery. A DC-DC converter is used to boost the electrical energy output from the photoelectric conversion module to power the high-voltage circuit of the new energy vehicle under preset high-voltage power supply conditions. Thus, the low-voltage electricity output from the photoelectric conversion module can be boosted again after the preset high-voltage power supply conditions are met to power the high-voltage circuit of the vehicle. This application achieves the gradual utilization of the low-voltage electricity output from the photoelectric conversion module by the heating load, low-voltage load, battery, and high-voltage circuit of the vehicle through the sequential satisfaction of the power supply needs of the heating load, low-voltage load, battery, and high-voltage circuit of the vehicle. This effectively reduces the energy loss caused by multiple voltage adjustments of the low-voltage electricity output from the photoelectric conversion module and improves the energy utilization rate of the photovoltaic power generation device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the new energy vehicle of this application;

[0033] Figure 2 This is a schematic diagram of the structure of a photovoltaic power generation device involved in the embodiments of this application;

[0034] Figure 3 This is another structural schematic diagram of the photovoltaic power generation device involved in the embodiments of this application;

[0035] Figure 4 This is a flowchart illustrating an embodiment of the control method for new energy vehicles according to this application;

[0036] Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.

[0037] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0040] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.

[0041] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0042] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0043] The control method for the new energy vehicle of this application is explained below with reference to some existing technologies:

[0044] In recent years, diverse new energy vehicle technologies have emerged, such as pure electric, range-extended, hybrid, fuel cell, and solar cell powertrains. Range-extended electric vehicles, especially methanol-powered range-extended vehicles, face challenges when starting in cold regions. If the battery charge is insufficient, the range extender needs to generate a small amount of electricity. However, the range extender also requires battery power to supply electricity to the generator (acting as an electric motor) to drive the engine. The poor low-temperature discharge and charging performance of batteries, coupled with the low volatility of methanol, all contribute to the difficulty of cold-starting methanol engines. Solar energy is the most abundant renewable energy source, widely distributed, green, pollution-free, and inexhaustible. Applying solar photovoltaic technology to methanol-powered range-extended vehicles can help solve the problem of low-temperature starting, contributing to energy conservation and emission reduction. While solar photovoltaic technology has already been applied in many automotive applications, all have some limitations.

[0045] Vehicles equipped with photovoltaic (PV) power generation devices typically use these devices to convert solar energy into electrical energy to charge the vehicle's battery. However, the electricity generated by PV devices is low-voltage and requires voltage boosting before it can charge the vehicle's high-voltage battery. Then, when the battery supplies power to low-voltage loads, it needs to be stepped down. This multiple voltage regulation process results in significant energy loss, leading to low utilization of the PV power generated and a waste of PV energy.

[0046] The low-voltage electricity output by the photoelectric conversion module of this application sequentially meets the power supply needs of the heating load and the low-voltage load on the vehicle's low-voltage circuit, the energy storage needs of the battery, and the power supply needs of the vehicle's high-voltage circuit. This enables the gradual utilization of the low-voltage electricity output by the photoelectric conversion module by the heating load, low-voltage load, battery, and vehicle high-voltage circuit, effectively reducing the energy loss caused by multiple voltage adjustments of the low-voltage electricity output by the photoelectric conversion module and improving the energy utilization rate of the photovoltaic power generation device.

[0047] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of an embodiment of a new energy vehicle according to this application. The first embodiment of this application provides a photovoltaic power generation device applied to a new energy vehicle. The photovoltaic power generation device includes: a photoelectric conversion module, a photovoltaic controller, a battery, and a DC-DC converter connected in sequence.

[0048] Photoelectric conversion module, used to convert light energy into electrical energy;

[0049] A photovoltaic controller is used to supply power to the heating load and low-voltage load of the new energy vehicle through the electrical energy output from the photoelectric conversion module;

[0050] A storage battery is used to charge the photovoltaic conversion module by the electrical energy output from the photovoltaic conversion module after the current power generation of the photovoltaic conversion module exceeds the first power demand of the heating load and the low-voltage load.

[0051] A DC-DC converter is used to boost the electrical energy output from the photoelectric conversion module to power the high-voltage circuit of the new energy vehicle under preset high-voltage power supply conditions.

[0052] In this embodiment, it should be noted that the new energy vehicle can be a pure electric vehicle, a range-extended vehicle, a fuel cell vehicle, etc.

[0053] In this embodiment, it should also be noted that the heating load can be a PTC (Positive Temperature Coefficient) heater, a resistance heater, or other loads suitable for heating. For example, the heating load can be used to heat the water inlet of the power battery, or it can be used directly to heat the power battery itself. The low-voltage load is a load in the low-voltage circuit of the new energy vehicle that requires low-voltage power supply, such as a water pump or sensor. The battery can be a low-voltage battery shared by the photovoltaic power generation device and the new energy vehicle, or it can be a separately connected external energy storage battery. The first required power is the sum of the required power of the heating load and the required power of the low-voltage load.

[0054] like Figure 1 As shown, Figure 1The new energy vehicles described herein take methanol-powered range-extended vehicles as an example. A methanol-powered range-extended vehicle comprises a power battery, a range extender, an electric drive system, a differential, a charging plug, and a heating circuit, among other components. These components communicate via CAN (Controller Area Network) to exchange information. The range extender consists of a methanol engine and a generator. The methanol engine drives the generator to generate electricity, which is then connected to the vehicle's high-voltage system. This electricity can charge the power battery or directly power the electric drive system. A photovoltaic conversion module (such as a photovoltaic panel) receives sunlight and converts light energy into electrical energy. The heating load of the power battery is connected to a photovoltaic controller in the photovoltaic power generation device via a heating circuit. The electrical energy output from the photovoltaic conversion module can power the heating load through the photovoltaic controller to heat the power battery. When the current power output of the photovoltaic conversion module exceeds the initial power requirements of the heating load and the low-voltage load, it indicates that there is excess electrical energy remaining after the photovoltaic conversion module outputs enough power to supply the heating load and the low-voltage load. This excess energy can then be charged to the battery through the photovoltaic controller to store it. Under the condition that the preset high-voltage power supply conditions are met (such as sufficient battery power and / or the power battery having a charging requirement), the voltage can be boosted by a DC-DC converter to convert the electrical energy output from the photoelectric conversion module into high-voltage electricity before it is connected to the high-voltage network of the new energy vehicle. Of course, it is understandable that when the electrical energy output from the photoelectric conversion module is insufficient to power the heating load, low-voltage load, or battery, the DC-DC converter can also step down the high-voltage electricity in the vehicle's high-voltage network for use by the heating load, low-voltage load, or battery.

[0055] The heating load is connected in series at the water inlet of the cooling circuit of the new energy vehicle. The photovoltaic power generation device also includes a power distribution unit.

[0056] One end of the power distribution unit is electrically connected to the DC-DC converter, and the other end is electrically connected to the power battery in the high-voltage circuit of the vehicle.

[0057] See Figure 2 , Figure 2 This is a schematic diagram of the structure of a photovoltaic power generation device involved in the embodiments of this application. Figure 2 The electrical connections of the photovoltaic power generation device and the cooling circuit of the power battery are described. For example... Figure 2As shown in the diagram, the thin solid line represents low-voltage electricity, the thick solid line represents high-voltage electricity, and the dashed line represents the cooling circuit of the power battery. Regarding the electrical connections of the photovoltaic power generation device, the photoelectric conversion module, photovoltaic controller, battery, DC converter, and current distribution unit are sequentially and electrically connected, with the power battery electrically connected to the current distribution unit. Furthermore, the power battery can also be electrically connected to the heating load, the loop water pump of the cooling circuit, the first water temperature sensor at the power battery inlet, the second water temperature sensor at the power battery outlet, and the photovoltaic controller. The cooling circuit of the power battery includes a first water temperature sensor, an expansion tank, a heat exchanger, a heating load, a three-way valve, a loop water pump, and a second water temperature sensor. The expansion tank is connected to the power battery's cooling circuit for degassing and simultaneously connected to the first valve port of the three-way valve to replenish water to the cooling circuit. A first water temperature sensor and a second water temperature sensor are respectively installed at the inlet and outlet of the power battery. The second water temperature sensor is connected to a heat exchanger, which is connected to the second valve port of a three-way valve. A heating load is connected in series between the heat exchanger and the three-way valve. The third valve port of the three-way valve is connected to the loop water pump of the cooling circuit, and then connected to the inlet of the power battery together with the first water temperature sensor. Unlike conventional power battery cooling water circuits, this embodiment connects a heating load for heating in series at the inlet of the power battery so that the low-voltage electricity output from the photovoltaic power generation device can be used to heat the cooling water in the cooling circuit at low temperatures, thereby increasing the temperature of the power battery. The electricity generated by the photovoltaic conversion module is output as low-voltage electricity (e.g., 24V) for the whole vehicle through the photovoltaic controller to power the battery, heating load, loop water pump, water temperature sensor, and other low-voltage loads. The battery is connected to a DC-DC converter, which is connected to a power distribution unit, which is connected to the power battery to boost the voltage of the electricity output from the photovoltaic conversion module to power the power battery under preset high-voltage power supply conditions.

[0058] like Figure 3 As shown, Figure 3 This is another structural schematic diagram of the photovoltaic power generation device involved in the embodiments of this application. Figure 3 The communication connections of the photovoltaic power generation device and the cooling circuit of the power battery are described. For example... Figure 3 As shown, the photovoltaic controller in the photovoltaic power generation device can also be connected to the vehicle's CAN bus to communicate with the photoelectric conversion module, battery, water temperature sensor, and power battery to obtain power generation information of the photoelectric conversion module, battery voltage information, water temperature information collected by the water temperature sensor, and power battery voltage information, etc.

[0059] In one embodiment of this application, the photovoltaic power generation device includes: a photoelectric conversion module, a photovoltaic controller, a storage battery, and a DC-DC converter, which are connected in sequence. The photoelectric conversion module converts light energy into electrical energy. The photovoltaic controller supplies power to the heating load and low-voltage load of the new energy vehicle using the electrical energy output from the photoelectric conversion module. Thus, in this embodiment, on the one hand, the low-voltage electricity generated by the photovoltaic power generation device directly powers the heating load and low-voltage load, avoiding the energy loss caused by the photovoltaic power supply strategy where the low-voltage electricity generated by the photovoltaic power generation device is first boosted to charge the power battery, and then the power battery is de-energized to power the heating load and low-voltage load, thereby improving the energy utilization rate of the photovoltaic power generation device. On the other hand, heating the power battery through the heating load also avoids the poor charging and discharging performance of the power battery at low temperatures, ensuring the charging and discharging performance of the power battery. The storage battery stores the electrical energy output by the photoelectric conversion module after the current power generation of the photoelectric conversion module exceeds the first power demand of the heating load and the low-voltage load. Therefore, excess electrical energy after the current power generation of the photoelectric conversion module exceeds the first power demand of the heating load and the low-voltage load can be stored in the battery. A DC-DC converter is used to boost the electrical energy output from the photoelectric conversion module to power the high-voltage circuit of the new energy vehicle under preset high-voltage power supply conditions. Thus, the low-voltage electricity output from the photoelectric conversion module can be boosted again after the preset high-voltage power supply conditions are met to power the high-voltage circuit of the vehicle. In this embodiment, the low-voltage electricity output from the photoelectric conversion module sequentially meets the power supply needs of the heating load and the low-voltage load on the vehicle's low-voltage circuit, the battery's energy storage needs, and the vehicle's high-voltage circuit's power supply needs. This achieves the gradual utilization of the low-voltage electricity output from the photoelectric conversion module by the heating load and low-voltage load, the battery, and the vehicle's high-voltage circuit, effectively reducing energy loss caused by multiple voltage adjustments of the low-voltage electricity output from the photoelectric conversion module and improving the energy utilization rate of the photovoltaic power generation device.

[0060] Furthermore, this application also provides a new energy vehicle, which includes the photovoltaic power generation device as described in any of the above embodiments. It is understood that the new energy vehicle may also include energy storage devices, drive devices, and other devices to ensure the normal operation of the vehicle.

[0061] Reference Figure 4 , Figure 4 This is a flowchart illustrating an embodiment of the control method for new energy vehicles according to this application. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0062] One embodiment of this application provides a control method for a new energy vehicle, applied to the new energy vehicle described above, the control method comprising:

[0063] Step S100: Power is supplied to the heating load and / or the low-voltage load based on the photovoltaic power generation device;

[0064] In this embodiment, it should be noted that the heating load can be a PTC (Positive Temperature Coefficient) heater, a resistance heater, or other loads suitable for heating. For example, the heating load can be used to heat the water inlet of the power battery, or it can be used directly to heat the power battery itself. The low-voltage load refers to loads in the low-voltage circuit of the new energy vehicle that require low-voltage power supply, such as water pumps and sensors.

[0065] In this embodiment, the heating load and the low-voltage load can be connected to the photovoltaic controller in the photovoltaic power generation device, respectively. The heating load of the power battery is connected to the photovoltaic controller in the photovoltaic power generation device via a heating circuit. Thus, after the photoelectric conversion module in the photovoltaic power generation device converts light energy into electrical energy, the low-voltage electricity output by the photoelectric conversion module can be output to the heating load and the low-voltage load through the photovoltaic controller. Since the power battery's charging and discharging performance is poor at low temperatures, this embodiment uses a heating load to heat the power battery, ensuring its charging and discharging performance. Furthermore, this embodiment directly supplies energy to the heating load and the low-voltage load from the photovoltaic power generation device, avoiding the energy loss caused by the photovoltaic power supply strategy where the low-voltage electricity generated by the photovoltaic power generation device is first boosted to charge the power battery, and then the power battery is stepped down to supply energy to the heating load and the low-voltage load. This improves the energy utilization rate of the photovoltaic power generation device.

[0066] In this embodiment, it can be understood that if the power battery does not require heating, the photovoltaic power generation device can supply energy only to the low-voltage load. If the current power generation of the photovoltaic power generation device is not higher than the first required power of the heating load and the low-voltage load, it can supply energy only to the heating load, and the low-voltage load can be supplemented by the power battery.

[0067] In step S100, the step of providing low-voltage power to the heating load and the low-voltage load based on the photovoltaic power generation device, the control method further includes:

[0068] Step S110: Obtain the inlet water temperature and outlet water temperature of the power battery;

[0069] Step S120: After the inlet water temperature is lower than the preset water temperature threshold, the heating load is turned on;

[0070] Step S130: After the outlet water temperature is not lower than the preset water temperature threshold, the heating load is turned off.

[0071] In this embodiment, the inlet and outlet water temperatures of the power battery can be acquired by a water temperature sensor. It can then be determined whether the inlet water temperature is lower than a preset water temperature threshold (e.g., 20°C, 23°C, 25°C, etc.). If the inlet water temperature is lower than the preset threshold, it indicates that the ambient temperature of the new energy vehicle is low, and the heating load can be activated to heat the power battery, reducing the difficulty of cold starting the new energy vehicle. Under the heating load, the temperature of the power battery gradually rises. It can then be determined whether the outlet water temperature is lower than the preset threshold to determine whether the power battery has been heated to a suitable temperature. If the outlet water temperature is lower than the preset threshold, it indicates that the temperature of the power battery is still too low, and heating can continue using the heating load. Once the outlet water temperature is not lower than the preset threshold, it indicates that the power battery has been heated to a suitable temperature, and the heating load can be turned off to prevent the power battery temperature from becoming too high and affecting its performance.

[0072] Step S200: After the current power generation of the photovoltaic power generation device is higher than the first required power of the heating load and the low-voltage load, the battery of the photovoltaic power generation device is charged based on the photovoltaic power generation device.

[0073] In this embodiment, it should be noted that the battery can be a low-voltage battery shared by the photovoltaic power generation device and the new energy vehicle, or it can be a separately connected external energy storage battery. The first required power is the sum of the required power of the heating load and the required power of the low-voltage load.

[0074] This embodiment obtains the current power output of the photovoltaic conversion module in the photovoltaic power generation device and compares it with the first power requirements of the heating load and the low-voltage load. If the current power output of the photovoltaic power generation device is higher than the first power requirements of the heating load and the low-voltage load, it indicates that there is excess power after the photovoltaic conversion module outputs enough power to supply the heating load and the low-voltage load. In this case, the photovoltaic power generation device's battery can be charged to store the excess power. If the current power output of the photovoltaic power generation device is not higher than the first power requirements of the heating load and the low-voltage load, then the photovoltaic power generation device's battery does not need to be charged.

[0075] Step S300: After the storage battery and the power battery in the vehicle high-voltage circuit meet the preset high-voltage power supply conditions, the photovoltaic power generation device supplies power to the power battery through the DC converter.

[0076] In this embodiment, it should be noted that the preset high-voltage power supply condition is a condition where the current power generation of the photovoltaic power generation device is high (i.e., the current power generation of the photovoltaic power generation device is higher than the first required power of the heating load and the low-voltage load), and the battery has sufficient charge and / or the power battery has a charging demand. For example, the current voltage of the battery is higher than a first preset voltage threshold (e.g., 25V, 30V, etc.) and / or the allowable charging power of the power battery is higher than a first preset power threshold (e.g., 8kW, 10kW, etc.). The first preset voltage threshold represents the voltage value at which the battery has sufficient charge and can be set according to specific needs and battery type. The first preset power threshold represents the allowable charging power of the power battery when it has a charging demand and can be set according to specific needs and power battery type.

[0077] After the power battery in the storage battery and the high-voltage circuit of the vehicle meets the preset high-voltage power supply conditions, this embodiment can use the photovoltaic power generation device to boost the low-voltage electricity output by the photovoltaic conversion module through the DC converter and then connect it to the high-voltage circuit of the new energy vehicle. Then, the boosted electrical energy is used to charge the power battery through the power distribution unit.

[0078] The step S300, after the storage battery and the power battery in the vehicle's high-voltage circuit meet the preset high-voltage power supply conditions, before the step of supplying power to the power battery through the DC-DC converter based on the photovoltaic power generation device, includes:

[0079] Step A10: Obtain the current voltage of the storage battery and the allowable charging power of the power battery;

[0080] Step A20: After the current voltage of the storage battery is higher than the first preset voltage threshold and the allowable charging power is higher than the first preset power threshold, it is determined that the storage battery and the power battery meet the preset high voltage power supply conditions.

[0081] In this embodiment, the current voltage of the storage battery and the allowable charging power of the power battery are obtained. It is then determined whether the current voltage of the storage battery is higher than a first preset voltage threshold and whether the allowable charging power is higher than a first preset power threshold. If the current voltage of the storage battery is higher than the first preset voltage threshold and the allowable charging power is higher than the first preset power threshold, it indicates that the storage battery has sufficient charge and the power battery has a charging demand. Therefore, it can be determined that the storage battery and the power battery meet the preset high-voltage power supply conditions. Then, the photovoltaic power generation device supplies power to the power battery through the DC-DC converter. If the current voltage of the storage battery is not higher than the first preset voltage threshold and / or the allowable charging power is not higher than the first preset power threshold, it can be determined that the storage battery and the power battery do not meet the preset high-voltage power supply conditions.

[0082] The step following the process of supplying power to the battery via the DC-DC converter based on the photovoltaic power generation device after the S300 battery and the power battery in the vehicle's high-voltage circuit meet the preset high-voltage power supply conditions includes:

[0083] Step B10: After the current voltage of the battery is lower than the second preset voltage threshold, or the allowable charging power is lower than the second preset power threshold, control the DC converter to stop working;

[0084] Step B20: Charge the battery using the photovoltaic power generation device.

[0085] In this embodiment, it should be noted that the second preset voltage threshold is lower than the first preset voltage threshold, such as 21V, 18V, etc. The second preset power threshold is lower than the first preset power threshold, such as 5kW, 6kW, etc.

[0086] In this embodiment, after the photovoltaic power generation device supplies power to the power battery through the DC-DC converter, the current voltage of the photovoltaic power generation device's battery is still obtained. It then determines whether the current battery voltage is lower than a second preset voltage threshold and whether the allowed charging power is lower than a second preset power threshold. If the current battery voltage is lower than the second preset voltage threshold, or the allowed charging power is lower than the second preset power threshold, it indicates that the battery's charge is insufficient, or the power battery's charge is sufficient. In this case, the DC-DC converter can be controlled to stop working. Then, the photovoltaic power generation device charges the battery. This embodiment ensures sufficient battery charge and avoids energy loss caused by continuously boosting the voltage to power the vehicle's high-voltage circuit even when the power battery has sufficient charge.

[0087] In one embodiment of the control method of this application, energy is supplied to the heating load and / or the low-voltage load based on the photovoltaic power generation device. Therefore, in this embodiment, on the one hand, the low-voltage electricity generated by the photovoltaic power generation device directly supplies energy to the heating load and the low-voltage load, avoiding the energy loss caused by the photovoltaic power supply strategy where the low-voltage electricity generated by the photovoltaic power generation device is first boosted to charge the power battery, and then the power battery is de-energized to supply energy to the heating load and the low-voltage load, thus improving the energy utilization rate of the photovoltaic power generation device. On the other hand, heating the power battery through the heating load also avoids the poor charging and discharging performance of the power battery at low temperatures, ensuring the charging and discharging performance of the power battery. After the current power generation of the photovoltaic power generation device exceeds the first required power of the heating load and the low-voltage load, the battery of the photovoltaic power generation device is charged based on the photovoltaic power generation device, thereby storing excess electrical energy in the battery. After the battery and the power battery in the vehicle's high-voltage circuit meet the preset high-voltage power supply conditions, the power battery is supplied with energy through the DC-DC converter based on the photovoltaic power generation device. Therefore, the low-voltage electricity output from the photoelectric conversion module can be boosted to power the battery after the preset high-voltage power supply conditions are met. In this embodiment, the low-voltage electricity output from the photoelectric conversion module sequentially meets the power supply needs of the heating load and the low-voltage load on the vehicle's low-voltage circuit, the battery's energy storage needs, and the vehicle's high-voltage circuit's power supply needs. This achieves the gradual utilization of the low-voltage electricity output from the photoelectric conversion module by the heating load and low-voltage load, the battery, and the vehicle's high-voltage circuit, effectively reducing the energy loss caused by multiple voltage adjustments of the low-voltage electricity output from the photoelectric conversion module and improving the energy utilization rate of the photovoltaic power generation device.

[0088] like Figure 5 As shown, Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application. This application also proposes a control device for new energy vehicles to implement the aforementioned control method for new energy vehicles.

[0089] Specifically, the control equipment for the new energy vehicle can be a VCU (Vehicle Control Unit), PC (Personal Computer), tablet computer, portable computer, or server, etc.

[0090] like Figure 5As shown, the control equipment of the new energy vehicle may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0091] Those skilled in the art will understand that Figure 5 The device structure shown does not constitute a limitation on the control device of the new energy vehicle, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0092] like Figure 5 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a control application for new energy vehicles.

[0093] exist Figure 5 In the device shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with the backend server; the user interface 1003 is mainly used to connect to the client and communicate data with the client; and the processor 1001 can be used to call the control program of the new energy vehicle stored in the memory 1005 to implement the operation in the control method of the new energy vehicle provided in the above embodiment.

[0094] Furthermore, this application also proposes a computer storage medium storing a computer program. When the computer program is executed by a processor, it implements the operations in the control method for new energy vehicles provided in the above embodiments. The specific steps will not be described in detail here.

[0095] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity / operation / object from another, and do not necessarily require or imply any such actual relationship or order between these entities / operations / objects; the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0096] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and relevant details can be found in the description of the method embodiments. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate. Some or all of the modules can be selected according to actual needs to achieve the purpose of this application. Those skilled in the art can understand and implement this without creative effort.

[0097] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0098] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, vehicle, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0099] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A photovoltaic power generation device, applied to new energy vehicles, characterized in that, The photovoltaic power generation device includes: a photoelectric conversion module, a photovoltaic controller, a storage battery, and a DC-DC converter connected in sequence; Photoelectric conversion module, used to convert light energy into electrical energy; A photovoltaic controller is used to supply power to the heating load and low-voltage load of the new energy vehicle through the electrical energy output from the photoelectric conversion module; A storage battery is used to store the electrical energy output by the photoelectric conversion module after the current power generation of the photoelectric conversion module exceeds the first power demand of the heating load and the low-voltage load. A DC-DC converter is used to boost the electrical energy output from the photoelectric conversion module to power the high-voltage circuit of the new energy vehicle under preset high-voltage power supply conditions. Wherein, after the current voltage of the battery is higher than the first preset voltage threshold and the allowable charging power of the power battery is higher than the first preset power threshold, it is determined that the battery and the power battery meet the preset high voltage power supply conditions. The new energy vehicle, after the power battery in the storage battery and the high-voltage circuit of the vehicle meets the preset high-voltage power supply conditions, supplies power to the power battery through the DC converter based on the photovoltaic power generation device. When the current voltage of the storage battery is lower than the second preset voltage threshold, or the allowable charging power is lower than the second preset power threshold, the DC converter is controlled to stop working; and the storage battery is charged based on the photovoltaic power generation device.

2. The photovoltaic power generation device as described in claim 1, characterized in that, The heating load is connected in series at the water inlet of the cooling circuit of the new energy vehicle.

3. The photovoltaic power generation device as described in claim 2, characterized in that, The photovoltaic power generation device also includes: a power distribution unit; One end of the power distribution unit is electrically connected to the DC-DC converter, and the other end is electrically connected to the power battery in the high-voltage circuit of the vehicle.

4. A new energy vehicle, characterized in that, The new energy vehicle includes a photovoltaic power generation device as described in any one of claims 1 to 3.

5. A control method for a new energy vehicle, applied to the new energy vehicle as described in claim 4, the control method comprising: The photovoltaic power generation device provides energy to the heating load and / or the low-voltage load. After the current power generation of the photovoltaic power generation device exceeds the first required power of the heating load and the low-voltage load, the battery of the photovoltaic power generation device is charged based on the photovoltaic power generation device; After the power battery in the storage battery and the high voltage circuit of the vehicle meets the preset high voltage power supply conditions, the photovoltaic power generation device supplies power to the power battery through the DC converter.

6. The control method as described in claim 5, characterized in that, In the step of providing low-voltage power to the heating load based on the photovoltaic power generation device, the control method further includes: Obtain the inlet and outlet water temperatures of the power battery; The heating load is activated after the inlet water temperature falls below a preset water temperature threshold. Once the outlet water temperature is not lower than the preset water temperature threshold, the heating load is turned off.

7. A control device for a new energy vehicle, characterized in that, The control device for the new energy vehicle includes a memory and a processor. The memory stores a computer program that can run on the processor. When the computer program is executed by the processor, it implements the steps of the control method for the new energy vehicle as described in any one of claims 5 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for a new energy vehicle, which, when executed by a processor, implements the steps of the control method for a new energy vehicle as described in any one of claims 5 to 6.

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