Photovoltaic power supply system of vehicle, control method and equipment of photovoltaic power supply system and storage medium

Abstract

The invention discloses a photovoltaic power supply system of a vehicle, a control method and equipment of the photovoltaic power supply system and a computer readable storage medium. The photovoltaic power supply system comprises a photovoltaic panel, a photovoltaic controller, a bidirectional direct-current converter and a power battery heating device. Photovoltaic power generation of the photovoltaic panel is connected to the photovoltaic controller, the photovoltaic controller is used for supplying power to a load through photovoltaic power generation, charging a storage battery of the vehicle and connecting the photovoltaic power generation to a whole vehicle high-voltage network of the vehicle after boosting the photovoltaic power generation through the bidirectional direct-current converter, and the load comprises a power battery heating device; the power battery heating device is used for heating a power battery of the vehicle. According to the efficient photovoltaic power supply system for the vehicle and the control scheme of the efficient photovoltaic power supply system, the photovoltaic power generation amount is fully utilized, and the utilization rate of photovoltaic power generation is increased.

Description

Technical Field

[0001] The present invention relates to the field of vehicle photovoltaic technology, and in particular to a vehicle photovoltaic power supply system and a control method, device and computer-readable storage medium thereof. Background Art

[0002] In recent years, cars have become one of the indispensable means of transportation in people's lives. While people enjoy the convenience brought by cars to our lives, the environmental pollution caused by cars has become more and more prominent. As one of the most abundant renewable energy sources, solar energy is green, pollution-free, and inexhaustible. Its combination with new energy vehicles provides support for energy conservation and emission reduction. At present, there are some photovoltaic application solutions in automobiles, but the existing photovoltaic automobile solutions have the problem of low utilization rate of photovoltaic power generation, resulting in waste of photovoltaic power generation. Summary of the invention

[0003] The main purpose of the present invention is to provide a photovoltaic power supply system for a vehicle and a control method, device and computer-readable storage medium thereof, aiming to provide an efficient photovoltaic power supply system for a vehicle and a control scheme thereof, so as to make full use of photovoltaic power generation and improve the utilization rate of photovoltaic power generation.

[0004] To achieve the above object, a photovoltaic power supply system for a vehicle is provided, the photovoltaic power supply system for the vehicle comprising:

[0005] Photovoltaic panels, photovoltaic controllers, bidirectional DC converters and power battery heating devices;

[0006] The photovoltaic power generation of the photovoltaic panel is connected to the photovoltaic controller, and the photovoltaic controller is used to power the load and charge the battery of the vehicle through photovoltaic power generation, and to connect the photovoltaic power generation to the vehicle's whole vehicle high voltage network after boosting it through the bidirectional DC converter, and the load includes the power battery heating device;

[0007] The power battery heating device is used to heat the power battery of the vehicle.

[0008] Optionally, the power battery heating device comprises a heat preservation box with a heating function and a temperature sensor group, the water outlet of the heat preservation box is connected to the water inlet of the power battery, the water inlet of the heat preservation box is connected to the water outlet of the power battery, and the temperature sensor group comprises a first temperature sensor for detecting the water inlet temperature of the power battery, a second temperature sensor for detecting the water outlet temperature of the power battery, and a third temperature sensor for detecting the water outlet temperature of the heat preservation box;

[0009] The photovoltaic controller is used to control the opening and closing of the heating function of the thermal insulation box according to the temperature values ​​measured by each temperature sensor in the temperature sensor group.

[0010] Optionally, the power battery heating device also includes a switching component, the thermal insulation box is connected in parallel with a heat exchanger on a cooling circuit in a power battery cooling system of the vehicle, and is used to replace the heat exchanger to form a heating circuit, and the switching component is used to control the connection of the cooling circuit or the heating circuit; the load also includes a battery circuit water pump in the cooling circuit.

[0011] In addition, the present invention also provides a control method, which is applied to a photovoltaic power supply system of a vehicle, wherein the photovoltaic power supply system includes a photovoltaic panel, a photovoltaic controller, a bidirectional DC converter and a power battery heating device, and the control method includes:

[0012] Powering a load connected to the photovoltaic controller through photovoltaic power generation of the photovoltaic panel;

[0013] When the power generated by the photovoltaic panel is greater than the power of the load connected to the photovoltaic controller and the battery meets the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the battery of the vehicle is charged by photovoltaic power generation;

[0014] When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle's whole vehicle high-voltage network.

[0015] Optionally, the control method further includes:

[0016] When the vehicle is not in operation, after receiving a power battery preheating instruction, the power battery heating device is controlled to heat the power battery.

[0017] Optionally, the power battery heating device further comprises a heat preservation box with a heating function, a temperature sensor group and a switching component, the temperature sensor group comprises a second temperature sensor, the heat preservation box is connected in parallel with a heat exchanger on a cooling circuit in a power battery cooling system of the vehicle, and is used to replace the heat exchanger to form a heating circuit;

[0018] The step of controlling the power battery heating device to heat the power battery comprises:

[0019] Controlling the switching component to connect the heating circuit;

[0020] If the temperature value measured by the second temperature sensor is greater than or equal to a first preset threshold, controlling to shut down a battery circuit water pump in the cooling circuit;

[0021] If the temperature value measured by the second temperature sensor is less than the first preset threshold, controlling to start the battery circuit water pump;

[0022] The control method further comprises:

[0023] When the vehicle is in a running state, the switching assembly is controlled to switch on the cooling circuit.

[0024] Optionally, the control method further includes:

[0025] The temperature data measured by the temperature sensors in the temperature sensor group are monitored, and the opening and closing of the heating function of the incubator are controlled according to the temperature data, so as to control the water temperature of the incubator within a set range.

[0026] Optionally, the temperature sensor group further includes a first temperature sensor and a third temperature sensor, and the step of monitoring the temperature data measured by the temperature sensors in the temperature sensor group and controlling the start and stop of the heating function of the incubator according to the temperature data includes:

[0027] When the vehicle is not in operation, monitoring the temperature values ​​respectively measured by the first temperature sensor, the second temperature sensor and the third temperature sensor;

[0028] If the first temperature value measured by the first temperature sensor is less than the second preset threshold value and the third temperature value measured by the third temperature sensor is less than the third preset threshold value, control to turn on the heating function of the incubator;

[0029] If the first temperature value is greater than or equal to the second preset threshold, or the third temperature value is greater than or equal to the third preset threshold, determining whether the second temperature value measured by the second temperature sensor is greater than or equal to the second preset threshold;

[0030] If the second temperature value is greater than or equal to the second preset threshold, controlling to turn off the heating function of the incubator;

[0031] If the second temperature value is less than the second preset threshold, the heating function of the incubator is controlled to be turned on.

[0032] Optionally, the control method further includes:

[0033] When the vehicle is not in operation, the first temperature sensor, the second temperature sensor, the third temperature sensor, the switching assembly, the battery circuit water pump and the incubator are connected to the photovoltaic controller to supply power through the photovoltaic power generation;

[0034] When the vehicle is in operation, the first temperature sensor, the second temperature sensor, the switching component, and the battery circuit water pump are switched to be powered and controlled by the vehicle's low-voltage network.

[0035] Optionally, the control method further includes:

[0036] If the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the first preset voltage, it is determined that the battery does not meet the preset charging condition;

[0037] If the photovoltaic power generation is not connected to the vehicle high-voltage network after being stepped up by the bidirectional DC converter, and the voltage of the battery is less than the first preset voltage, it is determined that the battery meets the preset charging condition;

[0038] If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than a second preset voltage, it is determined that the battery meets the preset charging condition, wherein the second preset voltage is less than the first preset voltage;

[0039] If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the second preset voltage, it is determined that the battery does not meet the preset charging condition.

[0040] Optionally, the control method further includes:

[0041] When the vehicle is in operation, if the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than the third preset voltage, the bidirectional DC converter is controlled to step down the high voltage of the vehicle high-voltage network and then charge the battery, and the third preset voltage is less than the second preset voltage.

[0042] Optionally, when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging condition, the steps of supplying power to the load connected to the photovoltaic controller through photovoltaic power generation and boosting the photovoltaic power generation through the bidirectional DC converter and then connecting it to the vehicle high-voltage network include:

[0043] When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the storage battery does not meet the preset charging condition, obtaining the allowable charging power of the power battery;

[0044] If the allowable charging power of the power battery is greater than the preset power, the load connected to the photovoltaic controller is powered by photovoltaic power generation, and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle high-voltage network to charge the power battery.

[0045] To achieve the above objectives, the present invention also provides a control device, which includes: a memory, a processor, and a control program stored in the memory and executable on the processor, and the control program implements the steps of the above control method when executed by the processor.

[0046] In addition, to achieve the above-mentioned purpose, the present invention further proposes a computer-readable storage medium, on which a control program is stored, and when the control program is executed by a processor, the steps of the above-mentioned control method are implemented.

[0047] In the present invention, a photovoltaic power supply system for a vehicle is provided, comprising: a photovoltaic panel, a photovoltaic controller, a bidirectional DC converter and a power battery heating device; the photovoltaic power generation of the photovoltaic panel is connected to the photovoltaic controller, the photovoltaic controller is used to supply power to the load and charge the vehicle's battery through photovoltaic power generation, and to connect the photovoltaic power generation to the vehicle's whole vehicle high-voltage network after boosting it through a bidirectional DC converter, the load includes a power battery heating device; the power battery heating device is used to heat the vehicle's power battery.

[0048] Through the proposed photovoltaic power supply system of the above-mentioned vehicle, photovoltaic power generation can be used to heat the power battery, charge the storage battery in the vehicle, and supply power to the high-voltage network of the entire vehicle, so as to make full use of the photovoltaic power generation and improve the utilization rate of photovoltaic power generation. In addition, the power generated by photovoltaics is used to reduce the power output of the power battery to the low voltage of the entire vehicle or battery heating, reduce the burden on the power battery, and indirectly increase the cruising range of the vehicle, achieving the purpose of extending the range. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A feasible new energy vehicle system diagram involved in an embodiment of the present invention;

[0050] Figure 2 A physical connection structure diagram of a photovoltaic power supply system and a vehicle power system according to an embodiment of the present invention;

[0051] Figure 3 A communication signal diagram between a photovoltaic power supply system and a vehicle power system according to an embodiment of the present invention;

[0052] Figure 4 It is a flow chart of the third embodiment of the control method of the present invention;

[0053] Figure 5A schematic diagram of a power battery heating control process according to an embodiment of the present invention;

[0054] Figure 6 A schematic diagram of a control flow of opening and closing a heat preservation box when a vehicle is not in operation according to an embodiment of the present invention;

[0055] Figure 7 A schematic diagram of a control flow of opening and closing a heat preservation box in a vehicle running state according to an embodiment of the present invention;

[0056] Figure 8 A schematic diagram of a photovoltaic power supply control process involved in an embodiment of the present invention;

[0057] Fig. 9 It is a schematic diagram of the structure of the hardware operating environment involved in the embodiment of the present invention.

[0058] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0059] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0060] A first embodiment of the photovoltaic power supply system for a vehicle of the present invention is proposed. In this embodiment, the photovoltaic power supply system for a vehicle includes:

[0061] Photovoltaic panels, photovoltaic controllers, bidirectional DC converters and power battery heating devices;

[0062] The photovoltaic power generation of the photovoltaic panel is connected to the photovoltaic controller, and the photovoltaic controller is used to power the load and charge the battery of the vehicle through photovoltaic power generation, and to connect the photovoltaic power generation to the vehicle's whole vehicle high voltage network after boosting it through the bidirectional DC converter, and the load includes the power battery heating device;

[0063] The power battery heating device is used to heat the power battery of the vehicle.

[0064] The electricity generated by the photovoltaic panel can be connected to the input end of the photovoltaic controller through a line. The output end of the photovoltaic controller can be connected to the load through a line, and the output voltage supplies power to the load. The power battery heating device can be used as a load connected to the output end of the photovoltaic controller, so that the electricity generated by the photovoltaic panel can be used to heat the power battery heating device, thereby reducing the amount of power output by the power battery for battery heating, reducing the burden on the power battery, and indirectly improving the vehicle's cruising range, achieving the purpose of extending the range. The vehicle's power battery is used to drive the vehicle. The parts of the photovoltaic controller's load can use low voltage or high voltage, which is not limited in this embodiment.

[0065] The output end of the photovoltaic controller can also be connected to the battery in the vehicle through a line to charge the battery. The battery in the vehicle can be used to power the low-voltage electrical appliances in the vehicle. In this embodiment, the battery is connected through the photovoltaic controller so that the electricity generated by the photovoltaic panel can be used to charge the battery, thereby reducing the amount of power battery output to the low-voltage network of the entire vehicle, reducing the burden on the power battery, and indirectly improving the vehicle's cruising range, achieving the purpose of extending the range. In one feasible implementation, the output end of the photovoltaic controller can be connected to the battery, and the battery is connected to the low-voltage electrical appliance. The power output of the photovoltaic controller charges the battery, and then the low-voltage electrical appliance is powered by the battery. In one feasible implementation, the output end of the photovoltaic controller can be connected to the low-voltage network of the entire vehicle, and the output power can be used to charge the battery in the low-voltage network of the entire vehicle, or it can directly power the low-voltage electrical appliances in the low-voltage network of the entire vehicle.

[0066] The photovoltaic controller can also connect the photovoltaic power generation to the vehicle's whole vehicle high-voltage network after boosting it through a bidirectional DC converter, so that it can be used to charge the power battery in the whole vehicle high-voltage network, so that the photovoltaic power generation can be fully utilized. In a specific implementation, the output end of the photovoltaic controller can be directly connected to the bidirectional DC converter through a line, or the output end of the photovoltaic controller can be connected to the battery through a line, and the battery is connected to the bidirectional DC converter. In a feasible implementation, the bidirectional DC converter can be directly implemented using the original bidirectional DC converter in the vehicle, that is, the bidirectional DC converter can also be used to charge the battery, power low-voltage electrical appliances, and power the load of the photovoltaic controller after the high-voltage electricity in the whole vehicle high-voltage network is stepped down. Thereby, on the one hand, the complexity of the implementation of the vehicle photovoltaic power supply system is reduced, and on the other hand, the normal operation of the vehicle can be guaranteed when the photovoltaic power generation is low due to weather, night, etc.

[0067] There are many specific implementations of the power battery heating device, which are not limited in this embodiment.

[0068] In this embodiment, through the proposed photovoltaic power supply system of the above-mentioned vehicle, photovoltaic power generation can be used to heat the power battery, charge the storage battery in the vehicle, and supply power to the high-voltage network of the entire vehicle, so that the photovoltaic power generation can be fully utilized and the utilization rate of photovoltaic power generation can be improved. In addition, the power generated by photovoltaics is used to reduce the power output of the power battery to the low voltage of the entire vehicle or the battery heating output, reduce the burden on the power battery, and indirectly increase the cruising range of the vehicle, thereby achieving the purpose of extending the range.

[0069] Based on the above first embodiment, a second embodiment of the photovoltaic power supply system for a vehicle of the present invention is proposed. In this embodiment, the power battery heating device may include a heat preservation box with a heating function and a temperature sensor group, the water outlet of the heat preservation box is connected to the water inlet of the power battery, the water inlet of the heat preservation box is connected to the water outlet of the power battery, and the temperature sensor group includes a first temperature sensor for detecting the water inlet temperature of the power battery, a second temperature sensor for detecting the water outlet temperature of the power battery, and a third temperature sensor for detecting the water outlet temperature of the heat preservation box;

[0070] The photovoltaic controller is used to control the opening and closing of the heating function of the thermal insulation box according to the temperature values ​​measured by each temperature sensor in the temperature sensor group.

[0071] There are many ways to implement the heating function of the incubator, which is not limited in the present embodiment. For example, it can be implemented through PTC (Positive Temperature Coefficient). The incubator can be located on the vehicle chassis, cargo box or above the power battery, and the location is not limited. The water outlet of the incubator is connected to the water inlet of the power battery, and the water inlet of the incubator is connected to the water outlet of the power battery, so that a loop can be formed, and the warm water in the incubator can heat the power battery through the loop. The incubator can be filled with water or coolant, which can be set as needed in the specific implementation. The temperature value detected by the temperature sensor group can be used to provide to the photovoltaic controller, so as to meet the requirements of temperature control and constant temperature. In the present embodiment, the control strategy of the photovoltaic controller to start and close the heating function of the incubator based on the measured temperature value is not limited. In the specific implementation, it can be set according to the needs of the actual application scenario.

[0072] In a feasible implementation, each temperature sensor in the temperature sensor group can be implemented by using the original temperature sensor in the power battery cooling system of the vehicle, thereby reducing the implementation complexity of the vehicle photovoltaic power supply system.

[0073] In a feasible implementation, the power battery heating device can be connected to the original power battery cooling system of the vehicle, so as to make full use of the original structure of the vehicle and reduce the complexity of integrating the photovoltaic power supply system into the original system of the vehicle. Specifically, the power battery heating device also includes a switching component, the insulation box is connected in parallel with the heat exchanger on the cooling circuit of the power battery cooling system of the vehicle, and is used to replace the heat exchanger to form a heating circuit, and the switching component is used to control the connection of the cooling circuit or the heating circuit; the load also includes a battery circuit water pump in the cooling circuit.

[0074] There are many ways to implement the switching component, which are not limited in this embodiment. For example, in one feasible implementation, it can be implemented by a three-way valve. The water outlet of the power battery is connected to the water inlet of the heat exchanger, the water outlet of the heat exchanger is connected to the water inlet of the battery circuit water pump, and the water outlet of the battery circuit water pump is connected to the water inlet of the power battery, thus forming a cooling circuit. In addition to the cooling circuit, the power battery cooling system may also include other parts, which are not limited in this embodiment. For example, it may also include an expansion kettle, the water inlet of the expansion kettle is connected to the water outlet of the power battery, and the water outlet of the expansion kettle is connected to the water inlet of the battery circuit water pump to achieve the functions of degassing and water replenishment.

[0075] In one possible implementation, if Figure 1 As shown in the figure, a new energy vehicle system diagram is given. Some new energy vehicles do not have a range extender, while some new energy vehicles have a range extender. The range extender can be any form of range extender such as a fuel cell or a range extender. The electric energy generated by the range extender is connected to the high-voltage network, which can charge the power battery or directly drive the vehicle. The power of the power battery can be used to drive the vehicle, and can also be used to supply power to the battery and the low-voltage electrical appliances of the whole vehicle through the step-down function of the bidirectional DCDC (bidirectional DC converter). The photovoltaic panel receives sunlight and converts solar energy into electrical energy. Photovoltaic power generation can heat the power battery and supply power to the battery and the low-voltage electrical appliances of the whole vehicle through the photovoltaic controller. It can also be connected to the high-voltage network of the whole vehicle through the step-up function of the bidirectional DCDC.

[0076] In one possible implementation, if Figure 2 As shown in the figure, a physical connection structure diagram of a photovoltaic power supply system and a vehicle power system is given. The figure is divided into two parts. The left part is connected by a water pipe ( Figure 2 The parts on the right are connected through the circuit ( Figure 2The power battery is connected to the high-voltage PDU (Power Distribution Unit), and the three-way valve, temperature sensor group, incubator, battery circuit water pump, high-voltage PDU and bidirectional DCDC are connected together through a circuit. The expansion kettle is connected to the power battery for degassing, and is connected to the upper three-way to replenish water in the cooling circuit. The first temperature sensor (T1) and the second temperature sensor (T2) are added to the water inlet and outlet of the power battery. The second temperature sensor is connected to the heat exchanger, and the heat exchanger is connected to the lower three-way, with a three-way valve in series in the middle. The lower three-way outlet is connected to the battery circuit water pump, and then connected to the power battery together with the first temperature sensor. The a port of the three-way valve is connected to the incubator, and the third temperature sensor (T3) is set at the water outlet of the incubator. The inlet of the incubator is connected to the upper three-way and merged into the water outlet of the power battery. Different from the conventional power battery cooling water circuit, in this embodiment, a three-way valve and the upper three-way are connected in series in the water inlet of the power battery. By controlling the opening and closing of the three-way valve, a heating water circuit is connected in parallel to the power battery water circuit. The insulation box integrates the water heating structure and the insulation structure, and the photovoltaic controller can be integrated with a remote app control and monitoring module. The electricity generated by the photovoltaic panel on the right is connected to the photovoltaic controller through the line. The photovoltaic controller can output 24V low-voltage electricity for the whole vehicle to power the battery and the load. The battery is connected to the two-way DCDC, the two-way DCDC is connected to the high-voltage PDU, and the high-voltage PDU is connected to the power battery.

[0077] In one possible implementation, if Figure 3 As shown in FIG. 1 , a communication signal diagram between a photovoltaic power supply system and a vehicle power system is given. The photovoltaic controller can be connected to the vehicle CAN (Controller Area Network) to read the temperature value measured by the temperature sensor group, the power battery voltage, the battery voltage, the photovoltaic panel voltage and other data.

[0078] Based on the photovoltaic power supply system of the vehicle in the first and / or second embodiments above, a third embodiment of the control method of the present invention is proposed. Figure 4 , Figure 4 1 is a flow chart of the third embodiment of the control method of the present invention. It should be noted that although the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than that shown here. In this embodiment, the control method may be applied to a photovoltaic controller in the photovoltaic power supply system of the above-mentioned vehicle. In this embodiment, the control method includes:

[0079] Step S10, supplying power to a load connected to the photovoltaic controller through photovoltaic power generation of the photovoltaic panel.

[0080] In this embodiment, in order to further fully utilize the power generated by photovoltaic panels and improve the utilization rate of photovoltaic power generation, a photovoltaic power supply control strategy is proposed, which can not only achieve the purpose of gradually and fully utilizing the photovoltaic power generation, but also heat the power battery, shorten the time for the power battery to heat to the optimal temperature, and improve the starting performance of the vehicle.

[0081] The photovoltaic power generation of the photovoltaic panel is connected to the photovoltaic controller. When the photovoltaic controller is connected to a load, the photovoltaic controller first supplies power to the load connected to the photovoltaic controller through photovoltaic power generation, for example, to the power battery heating device. Thus, when the power battery needs to be heated, the power battery can be heated through photovoltaic power generation, thereby reducing the amount of power output by the power battery to the low-voltage network of the entire vehicle, reducing the burden on the power battery, and indirectly increasing the vehicle's cruising range, achieving the purpose of extending the range.

[0082] It should be noted that the load connected to the photovoltaic controller refers to a load that is connected to the output end of the photovoltaic controller through a line and is in an on state. The on and off of each load can be controlled by the photovoltaic controller. In this embodiment, the specific control strategy is not limited and can be preset as needed.

[0083] Step S20, when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery meets the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the battery of the vehicle is charged by photovoltaic power generation.

[0084] The photovoltaic controller can obtain the power generated by the photovoltaic panel and the load power connected to the photovoltaic controller, and compare the two. If the power generated is greater than the load power, it means that there is still some power left after the photovoltaic power generation supplies power to the load connected to the photovoltaic controller. In order to make full use of the power generated by the photovoltaic panel, in this case, if it is detected that the battery meets the preset charging conditions, the load connected to the photovoltaic controller can be powered by photovoltaic power generation, and the vehicle's battery can also be charged by photovoltaic power generation.

[0085] The preset charging condition can be preset as needed, and is not limited in the present embodiment. For example, in one feasible implementation, the preset charging condition may be that the voltage of the battery is less than a certain voltage.

[0086] Step S30, when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging condition, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle's whole vehicle high voltage network.

[0087] If the generated power is greater than the load power, but the battery does not meet the preset charging conditions, in order to avoid wasting excess power, photovoltaic power generation can be used to power the load connected to the photovoltaic controller, and the photovoltaic power generation can be boosted by a bidirectional DC converter and connected to the vehicle's high-voltage network, thereby further making full use of the power generated by the photovoltaic panels and improving the utilization rate of photovoltaic power generation.

[0088] The control strategy for the photovoltaic power generation system proposed in this embodiment can realize the gradual utilization of photovoltaic power generation. First, it is used to heat the power battery to ensure the function of the vehicle, reduce the heating power output from the power battery, and save the energy loss of the power battery during the voltage conversion process. Secondly, the remaining photovoltaic power generation is used to charge the battery, which can be used for low-voltage electrical components of the whole vehicle, reducing the power input from the power battery to the low-voltage system through voltage reduction, and saving the energy loss of the power battery during the voltage conversion process. Finally, there is still abundant photovoltaic power generation to charge the power battery through the boost function of the bidirectional DC / DC. Step by step, make full use of photovoltaic power generation, improve the utilization rate of photovoltaic power generation, shorten the recovery period of the vehicle due to the increase of photovoltaic and other related parts costs, bring benefits to users as soon as possible, and reduce vehicle costs.

[0089] In one feasible implementation, the control method further includes:

[0090] Step S40, when the vehicle is not in operation, after receiving a power battery preheating instruction, controlling the power battery heating device to heat the power battery.

[0091] When the vehicle is not in operation, there is often a need to preheat the power battery. In this case, after receiving the power battery preheating instruction, the photovoltaic controller can control the power battery heating device to heat the power battery. The power battery preheating instruction can be sent remotely by the user or the user can set the start time according to his / her habits, which is not limited here.

[0092] In one feasible implementation, the step of controlling the power battery heating device to heat the power battery in step S40 includes:

[0093] Step S401, controlling the switching component to connect the heating circuit.

[0094] Step S402: If the temperature value measured by the second temperature sensor is greater than or equal to a first preset threshold, control to close the battery circuit water pump in the cooling circuit.

[0095] Step S403: If the temperature value measured by the second temperature sensor is less than the first preset threshold, control the battery circuit water pump to start.

[0096] After receiving the power battery preheating instruction when the vehicle is not in operation, the photovoltaic controller can control the switching component to connect the heating circuit and monitor the temperature value measured by the second temperature sensor. If the temperature value measured by the second temperature sensor is greater than or equal to the first preset threshold value, it means that the temperature of the power battery is high and no further heating is required. At this time, the battery circuit water pump can be controlled to be turned off. The first preset threshold value can be pre-set as needed, and is not limited in this embodiment. For example, it can be set to 20°C. If the temperature value measured by the second temperature sensor is less than the first preset threshold value, it means that the temperature of the power battery is low and needs to be heated. At this time, the battery circuit water pump can be controlled to start to drive the warm water in the insulation box into the power battery water circuit to heat the power battery.

[0097] The control method further comprises:

[0098] Step S50, when the vehicle is in operation, controlling the switching component to connect the cooling circuit.

[0099] When the vehicle is in operation, the photovoltaic controller can control the switching component to connect the cooling circuit, thereby executing a control strategy for cooling the power battery through the vehicle's original power battery cooling system.

[0100] In a feasible implementation manner, after receiving the battery preheating instruction, the following steps may be performed: Figure 5 The process shown controls the power battery heating device to heat the power battery. If the photovoltaic controller receives the power battery preheating instruction, the photovoltaic controller drives the three-way valve and the battery circuit water pump to operate, the three-way valve closes the cb circuit, opens the ab circuit, and the battery circuit water pump drives the coolant to heat the power battery with the warm water in the insulation box to increase the water temperature of the power battery circuit and shorten the heating time of the power battery. Until the temperature value of the second temperature sensor is ≥20℃ (can be calibrated according to actual conditions), stop driving the three-way valve and the battery circuit water pump.

[0101] In one feasible implementation, the control method further includes:

[0102] Step S60, monitoring the temperature data measured by the temperature sensors in the temperature sensor group, and controlling the start and stop of the heating function of the incubator according to the temperature data, so as to control the water temperature of the incubator within a set range.

[0103] The photovoltaic controller can monitor the temperature data measured by one or more temperature sensors in the temperature sensor group, and then control the opening and closing of the incubator heating function according to the temperature data. The control strategy for controlling the opening and closing function of the incubator is not limited in this embodiment, and can be set in advance as needed, as long as the water temperature of the incubator can be controlled within a certain range, so as to avoid spending a long time heating the water in the incubator when the power battery needs to be heated, that is, the efficiency of preheating the power battery can be improved. For example, in a feasible embodiment, the temperature value measured by the third temperature sensor can be monitored. If the temperature value measured by the third temperature sensor is greater than a certain threshold, the incubator heating function is controlled to be turned off. If it is less than or equal to the threshold, the incubator heating function is controlled to be turned on, so that the water temperature of the incubator is always maintained within a certain temperature range.

[0104] In one feasible implementation, step S60 includes:

[0105] Step S601: When the vehicle is not in operation, monitor the temperature values ​​respectively measured by the first temperature sensor, the second temperature sensor, and the third temperature sensor.

[0106] In this embodiment, a control strategy for the photovoltaic controller to control the heating function of the insulated box when the vehicle is not in operation is proposed. The photovoltaic controller can monitor the temperature values ​​measured by the first temperature sensor, the second temperature sensor, and the third temperature sensor, respectively. Hereinafter, the temperature value measured by the first temperature sensor is referred to as the first temperature value, the temperature value measured by the second temperature sensor is referred to as the second temperature value, and the temperature value measured by the third temperature sensor is referred to as the third temperature value for distinction.

[0107] Step S602: If the first temperature value measured by the first temperature sensor is less than the second preset threshold and the third temperature value measured by the third temperature sensor is less than the third preset threshold, control to turn on the heating function of the incubator.

[0108] The photovoltaic controller compares the first temperature value with the second preset threshold value, and compares the third temperature value with the third preset threshold value. The second preset threshold value and the third preset threshold value can be set as needed, and the second preset threshold value can be set to be smaller than the third preset threshold value. For example, the second preset threshold value is set to 20°C, and the third preset threshold value can be set to 30°C. If the first temperature value is smaller than the second preset threshold value and the third temperature value is smaller than the third preset threshold value, it means that the water temperature in the incubator is low and the temperature of the power battery is also low. In this case, the heating function of the incubator can be turned on so that when there is a need to preheat the power battery, the power battery can be heated in time by the warm water in the incubator.

[0109] Step S603: if the first temperature value is greater than or equal to the second preset threshold, or the third temperature value is greater than or equal to the third preset threshold, determine whether the second temperature value measured by the second temperature sensor is greater than or equal to the second preset threshold.

[0110] If the first temperature value is greater than or equal to the second preset threshold, it means that the temperature of the water inlet end of the power battery has not reached the level that requires heating; if the third temperature value is greater than or equal to the third preset threshold, it means that the water temperature in the insulation box is high enough to heat the power battery, and there is no need to continue heating and waste electricity; when any of these two situations occurs, it can be further determined whether the second temperature value is greater than or equal to the second preset threshold.

[0111] Step S604: if the second temperature value is greater than or equal to the second preset threshold, control to turn off the heating function of the incubator.

[0112] If the second temperature value is greater than or equal to the second preset threshold, it means that the temperature of the water outlet of the power battery has not reached the level that requires heating. At this time, the photovoltaic controller can control to turn off the heating function of the incubator to avoid the incubator from heating all the time and wasting photovoltaic power generation, and to avoid the incubator temperature from rising all the time and overheating the power battery, causing damage to the power battery.

[0113] Step S605: If the second temperature value is less than the second preset threshold, the heating function of the incubator is controlled to be turned on.

[0114] If the second temperature value is less than the second preset threshold, it means that the temperature of the water outlet of the power battery is low. At this time, the photovoltaic controller can control the heating function of the insulation box to start, thereby heating the power battery through the heating circuit.

[0115] In a feasible implementation manner, when the vehicle is not in operation, the following steps can be followed: Figure 6 The process shown controls the opening and closing of the incubator. The temperature signal of the temperature sensor group is transmitted to the photovoltaic controller. When the photovoltaic controller reads the temperature value of the first temperature sensor <20°C (can be calibrated according to actual conditions) and the temperature value of the third temperature sensor <30°C (can be calibrated according to actual conditions), the switch of the incubator is turned on to heat the coolant in the incubator.

[0116] In one feasible implementation, when the vehicle is in operation, the photovoltaic controller can monitor the temperature value of the vehicle through a third temperature sensor. When the temperature value of the third temperature sensor is less than a third preset threshold, the heating function of the incubator is controlled to be turned on; otherwise, the control function of the incubator is controlled to be turned off.

[0117] In one feasible implementation, the control method further includes:

[0118] Step S70, when the vehicle is not in operation, the first temperature sensor, the second temperature sensor, the third temperature sensor, the switching component, the battery circuit water pump and the insulation box are connected to the photovoltaic controller to supply power through the photovoltaic power generation.

[0119] Step S80, when the vehicle is in operation, the first temperature sensor, the second temperature sensor, the switching component, and the battery circuit water pump are switched to be powered and controlled by the vehicle's low-voltage network.

[0120] When the vehicle is not in operation, the temperature sensor group, the switching component, the battery circuit water pump and the insulation box can be connected to the photovoltaic controller, and the photovoltaic controller can be used for power supply and control to ensure that the power battery can be heated by photovoltaic power generation when the vehicle is not in operation. When the vehicle is in operation, the first temperature sensor, the second temperature sensor, the switching component and the battery circuit water pump can be switched to the vehicle's low-voltage network for power supply and control. Since the first temperature sensor, the second temperature sensor and the battery circuit water pump were originally powered and controlled by the vehicle's low-voltage network, when the vehicle is not in operation, in order to achieve heating of the power battery by photovoltaic power generation and make full use of photovoltaic power generation, the temperature sensor group, the switching component, the battery circuit water pump and the insulation box are all powered and controlled by the photovoltaic controller; after the vehicle is started, the first temperature sensor, the second temperature sensor and the battery circuit water pump are switched back to the low-voltage network of the vehicle for power supply and control, and the control logic can adopt the control logic of the original system of the vehicle, thereby ensuring the normal operation of the original function of the vehicle.

[0121] In a feasible implementation manner, when the vehicle is in operation, the following Figure 7 The process shown controls the opening and closing of the incubator. The photovoltaic controller closes the three-way valve, the battery circuit water pump, the first temperature sensor and the second temperature sensor according to the vehicle operation signal, and the low-voltage network of the vehicle is used for power supply and control; the three-way valve closes the ab circuit and opens the cb circuit. The photovoltaic controller drives the third temperature sensor and the incubator, and the temperature signal of the third temperature sensor is transmitted to the photovoltaic controller. When the photovoltaic controller reads the temperature value of the third temperature sensor <30℃ (can be calibrated according to the actual situation), the switch of the load incubator is turned on to heat the coolant in the incubator.

[0122] Based on the third embodiment above, a fourth embodiment of the control method of the present invention is proposed. In this embodiment, the control method further includes:

[0123] Step A10: If the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the first preset voltage, it is determined that the battery does not meet the preset charging condition.

[0124] In this embodiment, a feasible implementation method for determining whether a battery meets a preset charging condition is proposed.

[0125] It should be noted that in the two cases, when photovoltaic power generation is connected to the high-voltage network of the whole vehicle after being boosted by a bidirectional DC converter, and when it is connected to the high-voltage network of the whole vehicle without being boosted by a bidirectional DC converter, different judgment conditions can be set for the battery. In the case where photovoltaic power generation is connected to the high-voltage network of the whole vehicle after being boosted by a bidirectional DC converter, the photovoltaic controller can determine whether the voltage of the battery is greater than or equal to the first preset voltage. The first preset voltage can be pre-set as needed, and is not limited in this embodiment. For example, it can be set to 25V. If the voltage of the battery is greater than or equal to the first preset voltage, it means that the battery has sufficient power and does not need to be charged. That is, it can be determined that the battery does not meet the preset charging conditions, so that the remaining power after powering the load can be boosted and connected to the high-voltage network of the whole vehicle, making full use of the photovoltaic power generation.

[0126] Step A20: If the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than the first preset voltage, it is determined that the battery meets the preset charging condition.

[0127] If the battery voltage is less than the first preset voltage, it means that the battery power is insufficient. At this time, it can be determined that the battery meets the preset charging conditions, so that the battery can be charged through photovoltaic power generation to fully utilize the photovoltaic power generation.

[0128] Step A30: If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than the second preset voltage, it is determined that the battery meets the preset charging condition, wherein the second preset voltage is less than the first preset voltage.

[0129] When photovoltaic power generation is connected to the high-voltage network of the whole vehicle without being boosted by a bidirectional DC converter, the photovoltaic controller can determine whether the voltage of the battery is less than the second preset voltage. The second preset voltage can be preset as needed, and the second preset voltage is set to be less than the first preset voltage, for example, it can be set to 23V. If the voltage of the battery is less than the second preset voltage, it means that in the process of connecting to the high-voltage network of the whole vehicle after photovoltaic power generation boost, the low-voltage electrical appliances in the vehicle have consumed the power in the battery, causing the power in the battery to be reduced to a level that needs to be charged. At this time, it can be determined that the battery meets the preset charging conditions, so that photovoltaic power generation is turned to give priority to powering the battery. Since photovoltaic power generation has losses in the boosting process, by giving priority to charging the battery when the battery meets the charging conditions, the photovoltaic power generation can be fully utilized, and the battery power loss is also avoided, thereby extending the service life of the battery.

[0130] Step A40: If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the second preset voltage, it is determined that the battery does not meet the preset charging condition.

[0131] If the battery voltage is greater than or equal to the second preset voltage, it means that the battery power has not yet dropped to a level that requires charging. At this time, it can be determined that the battery does not meet the preset charging conditions, and the battery continues to be connected to the vehicle high-voltage network after boosting. The second preset voltage is less than the first preset voltage to avoid frequent switching between the two output paths of supplying power to the battery and connecting to the vehicle high-voltage network after boosting, thereby ensuring the stability of the system.

[0132] In one feasible implementation, the control method further includes:

[0133] Step A50, when the vehicle is in operation, if the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than a third preset voltage, the bidirectional DC converter is controlled to step down the high voltage of the vehicle high-voltage network and charge the battery, and the third preset voltage is less than the second preset voltage.

[0134] When the vehicle is in operation, if the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, it is possible to first determine whether the battery voltage is less than the third preset voltage. The third preset voltage can be preset as needed, and the third preset voltage is set to be less than the second preset voltage, for example, it can be set to 21V. When the battery voltage is less than the third preset voltage, it means that the power generation power of the photovoltaic panel is low and insufficient to charge the battery. At this time, the photovoltaic controller can control the bidirectional DC converter to step down the high voltage of the vehicle high-voltage network and charge the battery, thereby avoiding the battery power being too low. It can be understood that if the battery voltage is greater than or equal to the third preset voltage, it is determined whether the battery voltage is greater than or equal to the first preset voltage.

[0135] In one feasible implementation, step S30 includes:

[0136] Step S30, when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging condition, the allowable charging power of the power battery is obtained.

[0137] In this embodiment, in order to avoid overcharging the power battery, the photovoltaic controller can obtain the allowable charging power of the power battery when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging conditions. The allowable charging power can be obtained from the power battery.

[0138] Step S40, if the allowable charging power of the power battery is greater than the preset power, the load connected to the photovoltaic controller is powered by photovoltaic power generation, and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle high-voltage network to power the power battery.

[0139] The preset power can be preset as needed, and is not limited in the present embodiment. For example, it can be set to 8KW.

[0140] In one feasible implementation, when the allowable charging power of the power battery is less than or equal to the preset power, the photovoltaic controller no longer boosts the photovoltaic power generation through the bidirectional DC converter to supply power to the power battery, so as to avoid overcharging the power battery and causing battery damage.

[0141] In a feasible implementation, when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging conditions, if the photovoltaic controller connects the photovoltaic power generation to the vehicle high-voltage network without boosting, it is determined whether the allowable charging power of the power battery is greater than the first preset power; if it is greater than the first preset power, the photovoltaic power generation is connected to the vehicle high-voltage network after boosting, otherwise, it is connected to the vehicle network without boosting; when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging conditions, if the photovoltaic controller has connected the photovoltaic power generation to the vehicle high-voltage network through boosting, it is determined whether the allowable charging power of the power battery is less than the second preset power; if it is less than the second preset power, it is no longer connected to the vehicle network after boosting, and if it is greater than or equal to the second preset power, it is connected to the vehicle network after continuing to boost. The first preset power and the second preset power can be set as needed, and the second preset power can be set to be less than the first preset power, for example, the first preset power is set to 8KW and the second preset power is set to 6KW.

[0142] In one possible implementation, the following Figure 8The photovoltaic power supply control logic shown is used for control. When the vehicle is not running, when the photovoltaic power generation is greater than the power of the temperature sensor group, the incubator, the battery circuit water pump, the three-way valve and other loads, the excess power passes through the energy storage circuit. If the battery voltage is less than 25V (can be calibrated according to actual conditions), the photovoltaic will charge the battery. If the battery voltage is ≥25V (can be calibrated according to actual conditions) and the power battery can be charged with an allowable charging power of ≥8kW (can be calibrated according to actual conditions), it is considered that the photovoltaic power is sufficient and the power battery is allowed to be charged. The two-way DCDC works in a low-voltage to high-voltage mode to charge the power battery until the power battery can be charged with an allowable charging power of less than 6kW (can be calibrated according to actual conditions) or the battery voltage is less than 23V (can be calibrated according to actual conditions), the two-way DCDC stops working, and the photovoltaic system charges the battery instead. When the vehicle is running, when the photovoltaic power generation is greater than the power of the third temperature sensor and the incubator, the excess power passes through the energy storage circuit. If the battery voltage is less than 21V (can be calibrated according to actual conditions), the photovoltaic system power is insufficient, and the bidirectional DCDC starts to work in the high-voltage to low-voltage mode, and together with the excess power of the photovoltaic system, supplies power to the vehicle low-voltage network and charges the battery until the battery voltage is ≥25V (can be calibrated according to actual conditions), and the bidirectional DCDC stops the high-voltage to low-voltage working mode. If the battery voltage is ≥25V (can be calibrated according to actual conditions) and the power battery can be charged with an allowable charging power of ≥8kW (can be calibrated according to actual conditions), it is considered that the photovoltaic system power is sufficient and the power battery can be charged, and the bidirectional DCDC works in the low-voltage to high-voltage mode to charge the power battery until the power battery can be charged with an allowable charging power of <6kW (can be calibrated according to actual conditions) or the battery voltage is <23V (can be calibrated according to actual conditions), and the bidirectional DCDC stops working, and the photovoltaic system charges the battery instead.

[0143] In addition, the embodiment of the present invention also provides a control device, such as Fig. 9 As shown, Fig. 9 It is a schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present invention. It should be noted that the control device in the embodiment of the present invention can be a photovoltaic controller of the photovoltaic power supply system of the vehicle in the above embodiment.

[0144] like Fig. 9As shown, the control device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0145] Those skilled in the art will understand that Fig. 9 The device structure shown in the figure does not constitute a limitation on the control device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0146] like Fig. 9 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a control program. The operating system is a program that manages and controls the hardware and software resources of the device and supports the operation of the control program and other software or programs. Fig. 9 In the device shown, the user interface 1003 is mainly used for data communication with the client; the network interface 1004 is mainly used for establishing a communication connection with the server; and the processor 1001 can be used to call the control program stored in the memory 1005 and perform the following operations:

[0147] Powering a load connected to the photovoltaic controller through photovoltaic power generation of the photovoltaic panel;

[0148] When the power generated by the photovoltaic panel is greater than the power of the load connected to the photovoltaic controller and the battery meets the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the battery of the vehicle is charged by photovoltaic power generation;

[0149] When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle's whole vehicle high-voltage network.

[0150] In one feasible implementation, the processor 1001 may also be used to call the control program stored in the memory 1005 to perform the following operations:

[0151] When the vehicle is not in operation, after receiving a power battery preheating instruction, the power battery heating device is controlled to heat the power battery.

[0152] In a feasible implementation manner, the power battery heating device further includes a heat preservation box with a heating function, a temperature sensor group and a switching component, the temperature sensor group includes a second temperature sensor, and the heat preservation box is connected in parallel with a heat exchanger on a cooling circuit of a power battery cooling system of the vehicle, and is used to replace the heat exchanger to form a heating circuit;

[0153] The operation of controlling the power battery heating device to heat the power battery includes:

[0154] Controlling the switching component to connect the heating circuit;

[0155] If the temperature value measured by the second temperature sensor is greater than or equal to a first preset threshold, controlling to shut down a battery circuit water pump in the cooling circuit;

[0156] If the temperature value measured by the second temperature sensor is less than the first preset threshold, controlling to start the battery circuit water pump;

[0157] The processor 1001 may also be used to call the control program stored in the memory 1005 to perform the following operations:

[0158] When the vehicle is in a running state, the switching assembly is controlled to switch on the cooling circuit.

[0159] In one feasible implementation, the processor 1001 may also be used to call the control program stored in the memory 1005 to perform the following operations:

[0160] The temperature data measured by the temperature sensors in the temperature sensor group are monitored, and the opening and closing of the heating function of the incubator are controlled according to the temperature data, so as to control the water temperature of the incubator within a set range.

[0161] In a feasible implementation manner, the temperature sensor group further includes a first temperature sensor and a third temperature sensor, and the operation of monitoring the temperature data measured by the temperature sensors in the temperature sensor group and controlling the start and stop of the heating function of the incubator according to the temperature data includes:

[0162] When the vehicle is not in operation, monitoring the temperature values ​​respectively measured by the first temperature sensor, the second temperature sensor and the third temperature sensor;

[0163] If the first temperature value measured by the first temperature sensor is less than the second preset threshold value and the third temperature value measured by the third temperature sensor is less than the third preset threshold value, control to turn on the heating function of the incubator;

[0164] If the first temperature value is greater than or equal to the second preset threshold, or the third temperature value is greater than or equal to the third preset threshold, determining whether the second temperature value measured by the second temperature sensor is greater than or equal to the second preset threshold;

[0165] If the second temperature value is greater than or equal to the second preset threshold, controlling to turn off the heating function of the incubator;

[0166] If the second temperature value is less than the second preset threshold, the heating function of the incubator is controlled to be turned on.

[0167] In one feasible implementation, the processor 1001 may also be used to call the control program stored in the memory 1005 to perform the following operations:

[0168] When the vehicle is not in operation, the first temperature sensor, the second temperature sensor, the third temperature sensor, the switching assembly, the battery circuit water pump and the incubator are connected to the photovoltaic controller to supply power through the photovoltaic power generation;

[0169] When the vehicle is in operation, the first temperature sensor, the second temperature sensor, the switching component, and the battery circuit water pump are switched to be powered and controlled by the vehicle's low-voltage network.

[0170] In one feasible implementation, the processor 1001 may also be used to call the control program stored in the memory 1005 to perform the following operations:

[0171] If the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the first preset voltage, it is determined that the battery does not meet the preset charging condition;

[0172] If the photovoltaic power generation is not connected to the vehicle high-voltage network after being stepped up by the bidirectional DC converter, and the voltage of the battery is less than the first preset voltage, it is determined that the battery meets the preset charging condition;

[0173] If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than a second preset voltage, it is determined that the battery meets the preset charging condition, wherein the second preset voltage is less than the first preset voltage;

[0174] If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the second preset voltage, it is determined that the battery does not meet the preset charging condition.

[0175] In one feasible implementation, the processor 1001 may also be used to call the control program stored in the memory 1005 to perform the following operations:

[0176] When the vehicle is in operation, if the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than the third preset voltage, the bidirectional DC converter is controlled to step down the high voltage of the vehicle high-voltage network and then charge the battery, and the third preset voltage is less than the second preset voltage.

[0177] In a feasible implementation manner, when the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging condition, the operation of supplying power to the load connected to the photovoltaic controller through photovoltaic power generation and boosting the photovoltaic power generation through the bidirectional DC converter and then connecting it to the vehicle high-voltage network includes:

[0178] When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the storage battery does not meet the preset charging condition, obtaining the allowable charging power of the power battery;

[0179] If the allowable charging power of the power battery is greater than the preset power, the load connected to the photovoltaic controller is powered by photovoltaic power generation, and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle high-voltage network to charge the power battery.

[0180] In addition, an embodiment of the present invention further provides a computer-readable storage medium, on which a control program is stored. When the control program is executed by a processor, the steps of the control method described above are implemented.

[0181] The various embodiments of the control device and computer-readable storage medium of the present invention may refer to the various embodiments of the control method of the present invention, and will not be described in detail here.

[0182] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0183] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0184] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0185] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A photovoltaic power supply system for a vehicle, characterized in that: The photovoltaic power supply system of the vehicle comprises: Photovoltaic panels, photovoltaic controllers, bidirectional DC converters and power battery heating devices; The photovoltaic power generation of the photovoltaic panel is connected to the photovoltaic controller, and the photovoltaic controller is used to power the load and charge the battery of the vehicle through photovoltaic power generation, and to connect the photovoltaic power generation to the vehicle's whole vehicle high voltage network after boosting it through the bidirectional DC converter, and the load includes the power battery heating device; The power battery heating device is used to heat the power battery of the vehicle.

2. The photovoltaic power supply system for a vehicle according to claim 1, characterized in that: The power battery heating device comprises a heat preservation box with a heating function and a temperature sensor group, the water outlet of the heat preservation box is connected to the water inlet of the power battery, the water inlet of the heat preservation box is connected to the water outlet of the power battery, and the temperature sensor group comprises a first temperature sensor for detecting the water inlet temperature of the power battery, a second temperature sensor for detecting the water outlet temperature of the power battery, and a third temperature sensor for detecting the water outlet temperature of the heat preservation box; The photovoltaic controller is used to control the opening and closing of the heating function of the thermal insulation box according to the temperature values ​​measured by each temperature sensor in the temperature sensor group.

3. The photovoltaic power supply system for a vehicle as claimed in claim 2, characterized in that: The power battery heating device also includes a switching component. The thermal insulation box is connected in parallel with a heat exchanger on a cooling circuit in a power battery cooling system of a vehicle to replace the heat exchanger to form a heating circuit. The switching component is used to control the connection of the cooling circuit or the heating circuit. The load also includes a battery circuit water pump in the cooling circuit.

4. A control method, characterized in that: A photovoltaic power supply system applied to a vehicle, the photovoltaic power supply system comprising a photovoltaic panel, a photovoltaic controller, a bidirectional DC converter and a power battery heating device, the control method comprising: Powering a load connected to the photovoltaic controller through photovoltaic power generation of the photovoltaic panel; When the power generated by the photovoltaic panel is greater than the power of the load connected to the photovoltaic controller and the battery meets the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the battery of the vehicle is charged by photovoltaic power generation; When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging conditions, the load connected to the photovoltaic controller is powered by photovoltaic power generation and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle's whole vehicle high-voltage network.

5. The control method according to claim 4, characterized in that: The control method further comprises: When the vehicle is not in operation, after receiving a power battery preheating instruction, the power battery heating device is controlled to heat the power battery.

6. The control method according to claim 5, characterized in that: The power battery heating device further includes a heat preservation box with a heating function, a temperature sensor group and a switching component, the temperature sensor group includes a second temperature sensor, the heat preservation box is connected in parallel with a heat exchanger on a cooling circuit in a power battery cooling system of the vehicle, and is used to replace the heat exchanger to form a heating circuit; The step of controlling the power battery heating device to heat the power battery comprises: Controlling the switching component to connect the heating circuit; If the temperature value measured by the second temperature sensor is greater than or equal to a first preset threshold, controlling to shut down a battery circuit water pump in the cooling circuit; If the temperature value measured by the second temperature sensor is less than the first preset threshold, controlling to start the battery circuit water pump; The control method further comprises: When the vehicle is in a running state, the switching assembly is controlled to switch on the cooling circuit.

7. The control method according to claim 6, characterized in that: The control method further comprises: The temperature data measured by the temperature sensors in the temperature sensor group are monitored, and the opening and closing of the heating function of the incubator are controlled according to the temperature data, so as to control the water temperature of the incubator within a set range.

8. The control method according to claim 7, characterized in that: The temperature sensor group further includes a first temperature sensor and a third temperature sensor, and the step of monitoring the temperature data measured by the temperature sensors in the temperature sensor group and controlling the start and stop of the heating function of the incubator according to the temperature data includes: When the vehicle is not in operation, monitoring the temperature values ​​respectively measured by the first temperature sensor, the second temperature sensor and the third temperature sensor; If the first temperature value measured by the first temperature sensor is less than the second preset threshold value and the third temperature value measured by the third temperature sensor is less than the third preset threshold value, control to turn on the heating function of the incubator; If the first temperature value is greater than or equal to the second preset threshold, or the third temperature value is greater than or equal to the third preset threshold, determining whether the second temperature value measured by the second temperature sensor is greater than or equal to the second preset threshold; If the second temperature value is greater than or equal to the second preset threshold, controlling to turn off the heating function of the incubator; If the second temperature value is less than the second preset threshold, the heating function of the incubator is controlled to be turned on.

9. The control method according to claim 7, characterized in that: The control method further comprises: When the vehicle is not in operation, the first temperature sensor, the second temperature sensor, the third temperature sensor, the switching assembly, the battery circuit water pump and the incubator are connected to the photovoltaic controller to supply power through the photovoltaic power generation; When the vehicle is in operation, the first temperature sensor, the second temperature sensor, the switching component, and the battery circuit water pump are switched to be powered and controlled by the vehicle's low-voltage network.

10. The control method according to claim 4, characterized in that: The control method further comprises: If the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the first preset voltage, it is determined that the battery does not meet the preset charging condition; If the photovoltaic power generation is not connected to the vehicle high-voltage network after being stepped up by the bidirectional DC converter, and the voltage of the battery is less than the first preset voltage, it is determined that the battery meets the preset charging condition; If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than a second preset voltage, it is determined that the battery meets the preset charging condition, wherein the second preset voltage is less than the first preset voltage; If the photovoltaic power generation is connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is greater than or equal to the second preset voltage, it is determined that the battery does not meet the preset charging condition.

11. The control method according to claim 10, characterized in that: The control method further comprises: When the vehicle is in operation, if the photovoltaic power generation is not connected to the vehicle high-voltage network after being boosted by the bidirectional DC converter, and the voltage of the battery is less than the third preset voltage, the bidirectional DC converter is controlled to step down the high voltage of the vehicle high-voltage network and then charge the battery, and the third preset voltage is less than the second preset voltage.

12. The control method according to claim 4, characterized in that: When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the battery does not meet the preset charging condition, the steps of supplying power to the load connected to the photovoltaic controller through photovoltaic power generation and boosting the photovoltaic power generation through the bidirectional DC converter and then connecting it to the vehicle high-voltage network include: When the power generation power of the photovoltaic panel is greater than the load power connected to the photovoltaic controller and the storage battery does not meet the preset charging condition, obtaining the allowable charging power of the power battery; If the allowable charging power of the power battery is greater than the preset power, the load connected to the photovoltaic controller is powered by photovoltaic power generation, and the photovoltaic power generation is boosted by the bidirectional DC converter and connected to the vehicle high-voltage network to charge the power battery.

13. A control device, characterized in that: The control device comprises: a memory, a processor, and a control program stored in the memory and executable on the processor, wherein the control program implements the steps of the control method according to any one of claims 4 to 12 when executed by the processor.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a control program, and when the control program is executed by a processor, the steps of the control method according to any one of claims 4 to 12 are implemented.

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