Photovoltaic high voltage charging system, method and vehicle for a vehicle

Abstract

The application provides a photovoltaic high-voltage charging system, method and vehicle of a vehicle, and relates to the technical field of vehicles.The photovoltaic high-voltage charging system comprises a power battery system, a high-voltage power distribution unit and a photovoltaic control device; the power battery system comprises a power battery, the power battery system is connected with the high-voltage power distribution unit through first and second connection ends, the photovoltaic control device comprises a boost module connected with a photovoltaic panel, fifth and sixth connection ends of the boost module are connected with the first and second connection ends through a photovoltaic contactor, the photovoltaic control device can send a charging request signal to the power battery system under the condition that a photovoltaic charging condition is met, and if an allow photovoltaic charging instruction fed back by the power battery system based on the charging request signal is received, the photovoltaic contactor is closed to perform photovoltaic charging on the power battery system; during the photovoltaic charging process, if the photovoltaic charging condition is not met, the photovoltaic contactor is disconnected, and thus the effective controllability of photovoltaic high-voltage charging of the vehicle can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a photovoltaic high-voltage charging system, method and vehicle of a vehicle. BACKGROUND

[0002] With the rapid development of electric vehicles, electric vehicle charging technology has also attracted more and more attention. For example, photovoltaic charging is used to charge vehicles. Photovoltaic power generation is a technology that converts solar energy into electrical energy, and has the characteristics of green environmental protection.

[0003] In related technologies, photovoltaic power generation is usually used to charge electric vehicles. After the photovoltaic power generation is integrated into the power grid, the electric vehicle needs to be parked at a fixed point and connected to the power grid through a charging interface to charge the power battery of the vehicle. Photovoltaic power generation is less used directly on vehicles, and is often used for low-voltage charging of low-voltage storage batteries. Low-voltage storage batteries serve as auxiliary low-voltage systems of vehicles, such as power supply for lighting, window lifting, audio entertainment and other electrical equipment.

[0004] Therefore, there is an urgent need to provide a photovoltaic high-voltage charging system for a vehicle to improve the effective controllability of photovoltaic high-voltage charging of the power battery of the vehicle. SUMMARY

[0005] Therefore, the embodiments of the present application are committed to providing a photovoltaic high-voltage charging system, method and vehicle of a vehicle to improve the effective controllability of photovoltaic high-voltage charging of the vehicle.

[0006] The embodiments of the present application provide a photovoltaic high-voltage charging system for a vehicle, which comprises a power battery system, a high-voltage power distribution unit and a photovoltaic control device. The power battery system comprises a power battery, and the power battery system is provided with a first connection end and a second connection end for electric energy transmission with the high-voltage power distribution unit. The positive electrode end of the power battery is connected to the first connection end, and the negative electrode end of the power battery is connected to the second connection end. The high-voltage power distribution unit is provided with a third connection end and a fourth connection end for electric energy transmission with the power battery system. The third connection end is connected to the first connection end, and the fourth connection end is connected to the second connection end. The photovoltaic control device can perform photovoltaic charging on the power battery system. The photovoltaic control device comprises a boost module electrically connected to a photovoltaic panel. The boost module comprises a fifth connection end and a sixth connection end for electric energy transmission. The fifth connection end is connected to the first connection end, and the sixth connection end is connected to the second connection end.

[0007] In some embodiments, the high-voltage power distribution unit comprises a high-voltage power distribution contactor and an electrical component, the high-voltage power distribution contactor and the electrical component are connected in series between the third connection end and the fourth connection end; the power battery system further comprises at least one power battery contactor; wherein the positive terminal of the power battery is connected to the first connection end through the power battery contactor, and / or the negative terminal of the power battery is connected to the second connection end through the power battery contactor; the fifth connection end is connected to the first connection end through a photovoltaic contactor, and / or the sixth connection end is connected to the second connection end through the photovoltaic contactor.

[0008] In some embodiments, the at least one power battery contactor comprises a main positive contactor and a main negative contactor, the positive terminal of the power battery is connected to the first connection end through the main positive contactor, and the negative terminal of the power battery is connected to the second connection end through the main negative contactor; the power battery system further comprises a pre-charge circuit, the pre-charge circuit is connected in parallel to the main positive contactor, and the pre-charge circuit comprises a pre-charge contactor and a pre-charge resistor connected in series.

[0009] In some embodiments, one end of the high-voltage power distribution contactor is connected to the third connection end, and the electrical component is connected between the fourth connection end and the other end of the high-voltage power distribution contactor; the high-voltage power distribution unit further comprises a bus capacitor, a main resistance module and a backup resistance; wherein the bus capacitor is connected in parallel to the electrical component, the main resistance module is connected in parallel to the bus capacitor, and the backup resistance is connected in parallel to the bus capacitor; the main resistance module comprises a main resistance and a discharge switch connected in series.

[0010] In some embodiments, the photovoltaic high-voltage charging system further comprises a photovoltaic power distribution box, the photovoltaic power distribution box is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface; the first connection end, the third connection end and the fifth connection end are connected to a first connection point in the photovoltaic power distribution box through the first interface, the third interface and the fifth interface respectively; the second connection end, the fourth connection end and the sixth connection end are connected to a second connection point in the photovoltaic power distribution box through the second interface, the fourth interface and the sixth interface respectively; wherein the photovoltaic control device is provided with a seventh interface and an eighth interface, the fifth connection end is connected to the fifth interface through the seventh interface, and the sixth connection end is connected to the sixth interface through the eighth interface; wherein the first connection point and the fifth connection end are provided with the photovoltaic contactor, and / or the second connection point and the sixth connection end are provided with the photovoltaic contactor.

[0011] In some embodiments, the photovoltaic control device is provided with a ninth interface, a tenth interface, an eleventh interface and a twelfth interface; the first connection end and the third connection end are connected to a third connection point in the photovoltaic control device through the ninth interface and the eleventh interface respectively; the second connection end and the fourth connection end are connected to a fourth connection point in the photovoltaic control device through the tenth interface and the twelfth interface respectively; the fifth connection end is connected to the third connection point, and the sixth connection end is connected to the fourth connection point; wherein the photovoltaic contactor is arranged between the third connection point and the fifth connection end, and / or the photovoltaic contactor is arranged between the fourth connection point and the sixth connection end.

[0012] The photovoltaic high-voltage charging method of the vehicle provided in the embodiments of the present application is applied to a photovoltaic control device in a photovoltaic high-voltage charging system, and the photovoltaic high-voltage charging system further comprises a power battery system; the method comprises the following steps: in the case that a photovoltaic charging condition is met, sending a charging request signal to the power battery system; if an allow photovoltaic charging instruction fed back by the power battery system based on the charging request signal is received, closing a photovoltaic contactor to perform photovoltaic charging on at least the power battery system; in the process of performing photovoltaic charging on the power battery system, if the photovoltaic charging condition is not met, opening the photovoltaic contactor.

[0013] In some embodiments, before the step of sending the charging request signal to the power battery system, the method further comprises the following steps: acquiring power gear information of the vehicle; wherein the power gear information is used to represent an ON gear or an OFF gear of the vehicle; in the case that the power gear information is the OFF gear, sending a wake-up signal to the power battery system; wherein the wake-up signal is used to adjust the power battery system from a dormant state to a wake-up state capable of performing photovoltaic charging.

[0014] In some embodiments, the charging request signal is used to request the power battery system in the wake-up state to close the power battery contactor.

[0015] The embodiments of the present application provide a computer device, comprising a memory and a processor, the memory stores a computer program, and the processor implements the photovoltaic high-voltage charging method of any of the above-mentioned embodiments when executing the computer program.

[0016] The embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the photovoltaic high-voltage charging method of any of the above-mentioned embodiments.

[0017] The vehicle includes the photovoltaic high-voltage charging system.

[0018] In the embodiments, the photovoltaic high-voltage charging system includes a power battery system, a high-voltage power distribution unit, and a photovoltaic control device. The power battery system includes a power battery. The power battery system is provided with a first connection end and a second connection end for power transmission with the high-voltage power distribution unit. A positive electrode end of the power battery is connected to the first connection end, and a negative electrode end of the power battery is connected to the second connection end. The high-voltage power distribution unit is provided with a third connection end and a fourth connection end for power transmission with the power battery system. The third connection end is connected to the first connection end, and the fourth connection end is connected to the second connection end. The photovoltaic control device can perform photovoltaic charging on the power battery system. The photovoltaic control device includes a boost module electrically connected to a photovoltaic panel. The boost module includes a fifth connection end and a sixth connection end for power transmission. The fifth connection end is connected to the first connection end, and the sixth connection end is connected to the second connection end. The fifth connection end is connected to the first connection end through a photovoltaic contactor, and / or the sixth connection end is connected to the second connection end through a photovoltaic contactor. In this way, the effective controllability of photovoltaic high-voltage charging of the power battery of the vehicle can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A schematic diagram of the photovoltaic high-voltage charging system provided by the embodiments of the present application is shown.

[0020] Figure 2 A schematic diagram of the photovoltaic high-voltage charging system provided by the embodiments of the present application is shown.

[0021] Figure 3 A flowchart of the photovoltaic high-voltage charging method provided by the embodiments of the present application is shown.

[0022] Figure 4 A flowchart of the photovoltaic high-voltage charging method provided by the embodiments of the present application is shown.

[0023] Figure 5 A flowchart of the photovoltaic high-voltage charging method provided by the embodiments of the present application is shown.

[0024] Figure 6 A flowchart of the photovoltaic high-voltage charging method provided by the embodiments of the present application is shown.

[0025] Figure 7 A schematic diagram of the photovoltaic control module provided by the embodiments of the present application is shown.

[0026] Figure 8 A schematic diagram of the computer device provided by the embodiments of the present application is shown. DETAILED DESCRIPTION

[0027] In order to enable the person skilled in the art to better understand the technical solutions in the specification, the technical solutions in the embodiments of the specification will be clearly and completely described in the specification below in combination with the drawings in the embodiments of the specification. Obviously, the described embodiments are only part of the embodiments of the specification, not all the embodiments. Based on the embodiments in the specification, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the specification.

[0028] In the related art, when applying photovoltaic power generation to vehicle charging, photovoltaic power generation is often integrated into the power grid, and then the vehicle power battery system is charged through the power grid charging interface of the vehicle, or the electric energy provided by photovoltaic power generation is directly used for low-voltage charging of the low-voltage storage battery of the vehicle, so that the low-voltage storage battery can supply low-voltage electric energy to electrical equipment such as lighting, window lifting, and audio entertainment on the vehicle.

[0029] Therefore, it is necessary to provide a photovoltaic high-voltage charging system for a vehicle, which can effectively and controllably charge the power battery system with photovoltaic high-voltage when the vehicle is driving or parked, thereby improving the reliability of photovoltaic high-voltage charging of the vehicle.

[0030] The embodiments of the specification provide a photovoltaic high-voltage charging system for a vehicle, which can include a power battery system, a high-voltage power distribution unit, and a photovoltaic control device.

[0031] The power battery system can be an electric energy storage device for providing electric energy to the vehicle. The power battery system can include a power battery and a power battery contactor. The power battery contactor is a contactor, a relay, or a switch arranged in the power battery system. The power battery system can provide electric energy to high-voltage electrical components of the vehicle based on the power battery.

[0032] The high-voltage power distribution unit, i.e., a power distribution unit (PDU), a high-voltage distribution unit, or a vehicle high-voltage PDU, can be used to distribute and manage electric energy for electrical components such as electrical equipment of the vehicle. The photovoltaic control device, i.e., a solar charge unit (SCU) or a solar controller unit (SCU), can realize the conversion of solar energy into electric energy by being connected to the vehicle-mounted photovoltaic panel, and can perform photovoltaic charging of the electric energy provided by the photovoltaic panel to the power battery system.

[0033] Specifically, please refer to Figure 1 , Figure 1A schematic diagram of a photovoltaic high-voltage charging system is provided for the embodiments of the present disclosure. The power battery system can include a power battery, and the power battery system is provided with a first connection end 110 and a second connection end 120 for electric energy transmission with the high-voltage power distribution unit. The positive electrode end of the power battery is connected to the first connection end 110, and the negative electrode end of the power battery is connected to the second connection end 120.

[0034] Please continue to refer to Figure 1 The high-voltage power distribution unit is provided with a third connection end 130 and a fourth connection end 140 for electric energy transmission with the power battery system. The third connection end 130 is connected to the first connection end 110, and the fourth connection end 140 is connected to the second connection end 120.

[0035] Please continue to refer to Figure 1 The photovoltaic control device can perform photovoltaic charging on the power battery system. The photovoltaic control device includes a boost module electrically connected to a photovoltaic panel and a plurality of photovoltaic contactors. The boost module includes a fifth connection end 150 and a sixth connection end 160 for electric energy transmission. The fifth connection end 150 is connected to the first connection end 110, and the sixth connection end 160 is connected to the second connection end 120. The fifth connection end 150 is connected to the first connection end 110 through the photovoltaic contactor 2, and / or the sixth connection end 160 is connected to the second connection end 120 through the photovoltaic contactor 1.

[0036] In the above embodiments, by providing the photovoltaic control device in the vehicle high-voltage architecture including the power battery system and the high-voltage power distribution unit, when the vehicle needs to be charged, the power battery system and / or the high-voltage power distribution unit in the vehicle high-voltage architecture can be charged by photovoltaic high-voltage charging through the corresponding connection end.

[0037] In some embodiments, the high-voltage power distribution unit PDU can include a high-voltage power distribution contactor and an electrical component. The high-voltage power distribution contactor and the electrical component are connected in series between the third connection end 130 and the fourth connection end 140. For example, please continue to refer to Figure 1 The high-voltage power distribution contactor can be a main positive contactor provided in the high-voltage power distribution unit PDU. Specifically, one end of the high-voltage power distribution contactor is connected to the third connection end 130, and the electrical component is connected between the fourth connection end 140 and the other end of the high-voltage power distribution contactor. As an example, the electrical component can be an output end or an electrical end of high-voltage electric energy, such as a vehicle microcontroller (MCU), a driving motor, etc. Of course, it can be understood that the type and number of electrical components can include multiple.

[0038] In the present embodiment, the high-voltage power distribution unit PDU can further include a bus capacitor, a main resistance module, and a backup resistance. For example, please continue to refer to Figure 1The main resistance module includes a main resistance and a discharge switch connected in series, C represents a bus capacitor, Rmain represents the main resistance, and Rback represents a backup resistance. The bus capacitor is connected in parallel with the electrical component, the main resistance module is connected in parallel with the bus capacitor, and the backup resistance is connected in parallel with the bus capacitor.

[0039] In some embodiments, please refer to Figure 1 The power battery system can further include at least one power battery contactor. Specifically, the positive terminal of the power battery is connected to the first connection end 110 through one power battery contactor, or the negative terminal of the power battery is connected to the second connection end 120 through one power battery contactor, or the positive terminal of the power battery is connected to the first connection end 110 through one power battery contactor and the negative terminal of the power battery is connected to the second connection end 120 through another power battery contactor.

[0040] Specifically, the at least one power battery contactor in the power battery system can include a main positive contactor and a main negative contactor, please refer to Figure 1 The positive terminal of the power battery is connected to the first connection end 110 through the main positive contactor, and the negative terminal of the power battery is connected to the second connection end 120 through the main negative contactor.

[0041] Illustratively, please refer to Figure 1 The power battery system can further include a pre-charge circuit connected in parallel with the main positive contactor, and the pre-charge circuit includes a pre-charge contactor and a pre-charge resistance connected in series.

[0042] In the above embodiments, on the basis of the power battery system and the high-voltage power distribution unit in the vehicle high-voltage architecture, the photovoltaic control device is connected through the corresponding connection end and connection port, so that photovoltaic high-voltage charging can be performed through the photovoltaic control device.

[0043] Illustratively, the power battery system can further include a power battery management system (BMS), a power battery distribution unit (BDU), a power battery manual service disconnect (MSD), etc. Among them, the BMS and the BDU can distribute, protect and manage the electrical energy of the power battery, and ensure the safe and efficient operation of the power battery system. The MSD can serve as an insurance device for the entire photovoltaic high-voltage charging system.

[0044] In some embodiments, please refer to Figure 1The photovoltaic high-voltage charging system can further include a photovoltaic distribution box, which can be provided with a first interface 201, a second interface 202, a third interface 203, a fourth interface 204, a fifth interface 205, and a sixth interface 206.

[0045] The first connection end 110, the third connection end 130, and the fifth connection end 150 are connected to the first connection point in the photovoltaic distribution box through the first interface 201, the third interface 203, and the fifth interface 205, respectively. The second connection end 120, the fourth connection end 140, and the sixth connection end 160 are connected to the second connection point in the photovoltaic distribution box through the second interface 202, the fourth interface 204, and the sixth interface 206, respectively.

[0046] The photovoltaic control device is provided with a seventh interface 207 and an eighth interface 208. The fifth connection end 150 is connected to the fifth interface 205 through the seventh interface 207, and the sixth connection end 160 is connected to the sixth interface 206 through the eighth interface 208. Exemplarily, the first interface 201, the second interface 202, the third interface 203, the fourth interface 204, the fifth interface 205, the sixth interface 206, the seventh interface 207, and the eighth interface 208 can be physical interfaces for electrical connection.

[0047] Exemplarily, the first connection point and the second connection point can be the convergence points or connection points between the connection ends, which can be located on the interfaces or on the copper bars, connection lines, wires, or high-voltage lines between the interfaces.

[0048] Specifically, a photovoltaic contactor is arranged between the first connection point and the fifth connection end 150, or a photovoltaic contactor is arranged between the second connection point and the sixth connection end 160, or a photovoltaic contactor is arranged between the first connection point and the fifth connection end 150 and a photovoltaic contactor is arranged between the second connection point and the sixth connection end 160. As an example, please continue to refer to Figure 1 A photovoltaic contactor 2 can be arranged between the first connection point and the fifth connection end 150, and a photovoltaic contactor 1 can be arranged between the second connection point and the sixth connection end 160.

[0049] In the above embodiment, on the basis of the power battery system and the high-voltage power distribution unit of the vehicle high-voltage architecture, the photovoltaic power distribution box is arranged between the power battery system and the high-voltage power distribution unit, and the photovoltaic control device is connected to the photovoltaic power distribution box. In this way, the high-voltage power of the photovoltaic control device can be connected to the high-voltage power loop of the vehicle through the photovoltaic power distribution box, the utilization of photovoltaic power is realized, and the generalization and platformization of the vehicle parts used for photovoltaic high-voltage charging are improved. At the same time, in the embodiment, the high-voltage architecture between the power battery system and the high-voltage power distribution unit is not changed, and the photovoltaic high-voltage charging is realized by changing only the high-voltage circuit in the photovoltaic power distribution box, so that the arrangement is more convenient and the cost is lower.

[0050] In some embodiments, the photovoltaic high-voltage charging system can not be configured with a photovoltaic power distribution box, but the photovoltaic control device is arranged between the power battery system and the high-voltage power distribution unit in the vehicle high-voltage architecture through a corresponding interface. Specifically, please refer to Figure 2 , the photovoltaic control device can be provided with a ninth interface 209, a tenth interface 210, an eleventh interface 211 and a twelfth interface 212. Exemplarily, the ninth interface 209, the tenth interface 210, the eleventh interface 211 and the twelfth interface 212 can be physical interfaces for electrical connection.

[0051] The first connection end 110 and the third connection end 130 are connected to the third connection point in the photovoltaic control device through the ninth interface 209 and the eleventh interface 211 respectively. The fifth connection end 150 is connected to the third connection point. The second connection end 120 and the fourth connection end 140 are connected to the fourth connection point in the photovoltaic control device through the tenth interface 210 and the twelfth interface 212 respectively. The sixth connection end 160 is connected to the fourth connection point.

[0052] Exemplarily, the third connection point and the fourth connection point can refer to the convergence point or connection point between the connection ends, which can be located on the interface or on the copper bar, connection line, wire or high-voltage line between the interfaces.

[0053] Specifically, the third connection point and the fifth connection end 150 are provided with a photovoltaic contactor, or the fourth connection point and the sixth connection end 160 are provided with a photovoltaic contactor, or the third connection point and the fifth connection end 150 are provided with a photovoltaic contactor and the fourth connection point and the sixth connection end 160 are provided with a photovoltaic contactor. As an example, please continue to refer to Figure 2 , the third connection point and the fifth connection end 150 can be provided with a photovoltaic contactor 2 and the fourth connection point and the sixth connection end 160 can be provided with a photovoltaic contactor 1.

[0054] In the above embodiment, the photovoltaic control device is directly connected between the power battery system and the high-voltage power distribution unit of the vehicle high-voltage architecture, so that the high-voltage power of the photovoltaic control device can be connected to the high-voltage power loop of the vehicle. Compared with the photovoltaic power distribution box connected to the high-voltage power loop of the vehicle, the photovoltaic control device SCU has higher integration, simpler and more compact structure. Therefore, the photovoltaic high-voltage charging can be realized by only changing the high-voltage line without changing the high-voltage architecture between the power battery system and the high-voltage power distribution unit, which is convenient and low in cost.

[0055] For example, in the high-voltage architecture between the power battery system and the high-voltage power distribution unit, or in the high-voltage power loop between the power battery system and the high-voltage power distribution unit, when the high-voltage power loop is connected, each electrical component in the high-voltage power loop is powered on. Please continue to refer to Figure 1 or Figure 2 When the photovoltaic control device SCU is not connected to the high-voltage power loop between the power battery system and the high-voltage power distribution unit, the power-on process can be: closing the main positive contactor in the high-voltage power distribution unit PDU and closing the main negative contactor in the power battery system, then closing the pre-charging contactor, so that the power battery charges the bus capacitor C, and after being fully charged, the main positive contactor in the power battery system is closed, and then the pre-charging contactor is disconnected, and the vehicle electrical components work normally. In this way, by closing the pre-charging contactor before closing the main positive contactor in the power battery system, the electrical components in the high-voltage power loop can be buffered and protected based on the pre-charging resistor. The power-off process is: disconnecting the main positive contactor in the high-voltage power distribution unit PDU and the main positive contactor in the power battery system, then disconnecting the main negative contactor, and then closing the discharge switch. The electrical energy in the bus capacitor C is discharged through the main resistor module, and the discharge duration is about 2 seconds. If the main resistor module is damaged, the discharge can be performed through the backup resistor, and the duration is about 5 minutes. In this way, the charging and discharging of the bus capacitor can buffer and protect the high-voltage electrical components.

[0056] For example, since the photovoltaic charging power may be small, in some cases, the photovoltaic charging can only be auxiliary charging. For example, the power battery system can be provided with a vehicle-mounted charging port for grid charging, so that when the photovoltaic charging cannot meet the power demand of the vehicle, the vehicle can be charged through the vehicle-mounted charging port.

[0057] The photovoltaic high-voltage charging method of the vehicle provided in the embodiments of the present application is described below with reference to Figure 3 , Figure 3is a flowchart of a photovoltaic high-voltage charging method of a vehicle provided by the embodiment. The embodiment provides the method operation steps as shown in the flowchart, but more or fewer operation steps can be included based on conventional or non-inventive labor. The order of steps listed in the embodiment is only one of the many execution manners of the execution order of the steps, and does not represent the only execution order. In actual system or server product execution, the method order shown in the embodiment can be executed in sequence or in parallel (for example, in a parallel processor or multi-thread processing environment). The photovoltaic high-voltage charging method can be applied to a photovoltaic control device in a photovoltaic high-voltage charging system, specifically as shown in Figure 3 The photovoltaic high-voltage charging method can include the following steps.

[0058] Step S310: If the photovoltaic charging condition is met, a charging request signal is sent to the power battery system.

[0059] In some cases, please refer to Figure 1 and Figure 2 In the photovoltaic high-voltage charging system, the photovoltaic control device SCU can interact with the vehicle high-voltage PDU and the power battery management system BMS in the power battery system.

[0060] Specifically, please refer to Figure 4 The photovoltaic control device SCU can determine whether the photovoltaic charging condition is met based on its own state, interaction information with the vehicle high-voltage PDU and the power battery management system BMS. If the photovoltaic charging condition is met, a charging request signal can be sent to the power battery management system BMS in the power battery system to prepare for photovoltaic high-voltage charging. Illustratively, when determining whether the photovoltaic charging condition is met, the own state can include but is not limited to photovoltaic power generation power, light intensity, etc., and the interaction information with the battery management system BMS can include the power of the power battery. Of course, it can be understood that the types of the above-mentioned interaction information for determining whether the photovoltaic charging condition is met can be determined according to actual conditions.

[0061] Step S320: If the power battery management system BMS in the power battery system receives the photovoltaic charging permission instruction fed back by the power battery system based on the charging request signal, the photovoltaic contactor is closed to at least charge the power battery system with photovoltaic power.

[0062] In some cases, please refer to Figure 4 The power battery management system BMS in the power battery system can determine whether the photovoltaic high-voltage charging can be performed based on the charging request signal after receiving the charging request signal sent by the photovoltaic control device SCU. If it is determined that the photovoltaic high-voltage charging can be performed based on the charging request signal, the photovoltaic control device SCU can send a photovoltaic charging permission instruction.

[0063] Specifically, please refer to Figure 4 , the photovoltaic control device SCU can close the photovoltaic contactor to at least enable photovoltaic high-voltage charging to the power battery system in the case of receiving the photovoltaic charging permission instruction sent by the power battery management system BMS. Illustratively, please refer to Figure 1 or Figure 2 , the photovoltaic contactor 1 and the photovoltaic contactor 2 can be closed to connect the photovoltaic contactor into the high-voltage power loop to at least enable photovoltaic high-voltage charging to the power battery system.

[0064] Step S330: In the process of photovoltaic charging to the power battery system, if the photovoltaic charging condition is not met, the photovoltaic contactor is disconnected.

[0065] Specifically, please refer to Figure 4 , the photovoltaic control device SCU judges in real time whether the photovoltaic charging condition is met in the process of photovoltaic charging to the power battery system. If the photovoltaic charging condition is met, photovoltaic high-voltage charging is continued. If the photovoltaic charging condition is not met, the photovoltaic contactor in the SCU is disconnected to stop photovoltaic high-voltage charging. Illustratively, please refer to Figure 1 or Figure 2 , if the photovoltaic charging condition is not met, the photovoltaic contactor 1 and the photovoltaic contactor 2 can be disconnected to stop photovoltaic high-voltage charging.

[0066] In the above-mentioned embodiments, based on the photovoltaic high-voltage charging system, the photovoltaic control device SCU judges whether the photovoltaic charging condition is met. In the case that the photovoltaic charging condition is met, a charging request signal is sent to the power battery system. In the case that the photovoltaic charging permission instruction fed back by the power battery system based on the charging request signal is received, the photovoltaic contactor is closed to at least enable photovoltaic charging to the power battery system. In the process of photovoltaic charging to the power battery system, if the photovoltaic charging condition is not met, the photovoltaic contactor is disconnected. In this way, the effective controllability of photovoltaic high-voltage charging of the vehicle is improved.

[0067] In some embodiments, please refer to Figure 5 , before the charging request signal is sent to the power battery system, the photovoltaic high-voltage charging method can further include the following steps S510-S520.

[0068] Step S510: Obtain power gear information of the vehicle; wherein the power gear information is used for ON gear or OFF gear of the vehicle.

[0069] In some cases, the ON gear represents the unscrewed state of the vehicle key, and the OFF gear represents the closed state of the vehicle key. When the vehicle is in the ON gear, the power battery contactor and the high-voltage power distribution contactor are in the closed state. When the vehicle is in the OFF gear, the power battery contactor and the high-voltage power distribution contactor are in the disconnected state.

[0070] In some cases, the BMS in the power battery system is in the wake-up state when the vehicle is running, and the BMS in the power battery system can be in the sleep state or the wake-up state when the vehicle is in the parking or stopping state. Therefore, in order to enable the photovoltaic high-voltage charging to the power battery system when the vehicle is in the parking or stopping state, it is necessary to determine the power gear information of the vehicle and the sleep or wake-up state of the power battery system, and whether the photovoltaic high-voltage charging can be performed.

[0071] Specifically, referring to Figure 6 Before the SCU sends the charging request signal to the power battery system, the SCU can obtain the power gear information of the vehicle, and determine whether the power battery system needs to be woken up based on the power gear information.

[0072] For example, when the vehicle is in the ON gear, the high-voltage distribution contactor and the power battery contactor are both closed. At this time, if the photovoltaic contactor is closed, the high-voltage power loop between the SCU and the power battery system is connected, and at this time, the BMS in the power battery system is in the wake-up state, and the photovoltaic high-voltage charging can be performed.

[0073] For example, when the vehicle is in the OFF gear, the high-voltage distribution contactor and the power battery contactor are disconnected, and the BMS in the power battery system can be in the sleep state. At this time, the BMS needs to be woken up, and after the BMS is woken up, the power battery contactor of the power battery system is closed through the BMS. In this way, when the photovoltaic contactor is closed, the high-voltage power loop between the SCU and the power battery system is connected.

[0074] Step S520: In the case that the power gear information is in the OFF gear, a wake-up signal is sent to the power battery system; wherein the wake-up signal is used to adjust the power battery system from the sleep state to the wake-up state capable of photovoltaic charging.

[0075] Specifically, in the case that the photovoltaic charging condition is met, if the power gear information is in the OFF gear, the SCU can send a wake-up signal to the BMS in the power battery system to instruct the BMS in the power battery system to adjust from the sleep state to the wake-up state, and send a charging request signal to the BMS after sending the wake-up signal. For example, the charging request signal can be used to request the BMS in the wake-up state of the power battery system to close the power battery contactor.

[0076] Exemplarily, when the power gear information is ON gear, it indicates that the BMS is in the wake-up state, and the photovoltaic control device SCU can directly send a charging request signal to the BMS.

[0077] In the above embodiment, the photovoltaic control device adjusts the BMS in the power battery system from the sleep state to the wake-up state capable of photovoltaic charging by obtaining the power gear information representing the ON gear or the OFF gear of the vehicle and sending a wake-up signal to the power battery system when the power gear information is the OFF gear. In this way, the photovoltaic high-voltage charging of the vehicle can be realized when the vehicle is in the OFF gear, and the effective controllability of the photovoltaic high-voltage charging of the vehicle is improved.

[0078] The embodiment of the present specification provides a photovoltaic high-voltage charging method which can be applied to a photovoltaic high-voltage charging system. Please continue to refer to Figure 4 The photovoltaic high-voltage charging method can include the following steps.

[0079] Step S601: Determine whether the photovoltaic charging condition is met.

[0080] Step S602: If the photovoltaic charging condition is met, when the vehicle gear information is the ON gear, the photovoltaic control device SCU sends a charging request signal to the BMS of the power battery management system.

[0081] Exemplarily, when the vehicle gear information is the ON gear, the power battery contactor and the high-voltage power distribution contactor are in the closed state.

[0082] Step S603: After receiving the charging request signal, the power battery management system BMS sends a photovoltaic charging permission instruction to the photovoltaic control device.

[0083] Step S604: After receiving the photovoltaic charging permission instruction, the photovoltaic control device SCU closes the photovoltaic contactor in the SCU, so that the photovoltaic control device accesses the high-voltage power loop and performs photovoltaic high-voltage charging on the power battery in the power battery system.

[0084] Exemplarily, when the vehicle gear information is the ON gear, the high-voltage power distribution unit PDU is also connected with the photovoltaic control device SCU, and at this time, the photovoltaic control device can perform photovoltaic high-voltage power supply for the high-voltage power distribution unit.

[0085] Exemplarily, during the photovoltaic high-voltage charging process, if the photovoltaic charging condition is not met, the SCU can disconnect the photovoltaic contactor in the SCU, and can send a stop charging request signal to the BMS, and the photovoltaic high-voltage charging is ended.

[0086] The embodiments of the present specification provide a photovoltaic high-voltage charging method, which can be applied to a photovoltaic high-voltage charging system. Please continue to refer to Figure 6 The photovoltaic high-voltage charging method can include the following steps.

[0087] Step S701: Determine whether the photovoltaic charging condition is met.

[0088] Step S702: If the photovoltaic charging condition is met, and the vehicle gear information is in the OFF gear, the SCU sends a wake-up signal to the BMS.

[0089] Exemplarily, when the vehicle gear information is in the OFF gear, the power battery contactor and the high-voltage power distribution contactor are in a disconnected state, and the BMS can be in a sleep state.

[0090] Step S703: If the BMS in the sleep state receives the wake-up signal sent by the SCU, the BMS is adjusted to a wake-up state.

[0091] Step S704: The SCU sends a charging request signal to the BMS.

[0092] Step S705: After receiving the charging request signal, the BMS closes the power battery contactor in the power battery system and sends a photovoltaic charging permission instruction to the photovoltaic control device.

[0093] Exemplarily, since the power battery contactor is disconnected when the power gear information is in the OFF gear, the BMS can close the power battery contactor after receiving the charging request signal.

[0094] Step S706: After receiving the photovoltaic charging permission instruction, the SCU closes the photovoltaic contactor in the SCU, so that the photovoltaic control device accesses the high-voltage power loop and performs photovoltaic high-voltage charging on the power battery in the power battery system.

[0095] Exemplarily, when the vehicle gear information is in the OFF gear, the high-voltage power distribution unit PDU and the photovoltaic control device SCU are not connected, at this time, the photovoltaic control device can only perform photovoltaic high-voltage charging for the power battery system.

[0096] Step S707: During the photovoltaic high-voltage charging process, if the photovoltaic charging condition is not met, the SCU can disconnect the photovoltaic contactor in the SCU and send a stop charging request signal to the BMS.

[0097] Step S708: After receiving the stop charging request signal, the BMS can disconnect the power battery contactor, and the photovoltaic high-voltage charging is completed.

[0098] Exemplarily, since the power battery contactor of the power battery system in the power gear information OFF gear is disconnected when the photovoltaic high-voltage charging is not performed, the power battery contactor can be disconnected when the BMS receives the stop charging request signal in the power gear information OFF gear.

[0099] In the above embodiment, in the case of the power gear information OFF gear, since the high-voltage distribution contactor of the high-voltage distribution unit PDU is disconnected, the electrical components in the high-voltage power loop are not connected to high-voltage power, so that the safety of each high-voltage electrical component can be ensured when the vehicle performs photovoltaic high-voltage charging in the power gear information OFF gear, and the effective controllability of the photovoltaic high-voltage charging of the vehicle is further improved.

[0100] The embodiment of the present specification provides a photovoltaic control module, please refer to Figure 7 , applied to a photovoltaic high-voltage charging system, the photovoltaic high-voltage charging system further comprises a power battery system; the photovoltaic control module can comprise a charging request submodule 810, a first control submodule 820 and a second control submodule 830.

[0101] The charging request submodule 810 is configured to send a charging request signal to the power battery system when the photovoltaic charging condition is met;

[0102] The first control submodule 820 is configured to close the photovoltaic contactor to at least perform photovoltaic charging on the power battery system if the photovoltaic contactor is closed to at least perform photovoltaic charging on the power battery system if the photovoltaic charging permission instruction based on the charging request signal is received from the power battery system;

[0103] The second control submodule 830 is configured to disconnect the photovoltaic contactor if the photovoltaic charging condition is not met during the photovoltaic charging on the power battery system.

[0104] In some embodiments, the charging request submodule is further configured to: obtain power gear information of the vehicle before sending the charging request signal to the power battery system; wherein the power gear information is used to represent the ON gear or the OFF gear of the vehicle; send a wake-up signal to the power battery system in the case of the power gear information OFF gear; wherein the wake-up signal is used to adjust the wake-up state capable of performing photovoltaic charging when the power battery system is in the sleep state.

[0105] For specific functions and effects realized by the photovoltaic control module, please refer to the explanation of other embodiments of the present specification, which will not be repeated here. Each submodule in the photovoltaic control module can be realized by software, hardware and their combination in whole or in part. Each submodule can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0106] The embodiment of the present specification also provides a computer readable storage medium, which stores a computer program. The computer program is executed by a computer to make the computer execute the photovoltaic high-voltage charging method in any of the above embodiments.

[0107] The embodiment of the present specification also provides a computer program product comprising instructions which, when executed by a computer, perform the photovoltaic high-voltage charging method in any of the above embodiments.

[0108] The embodiment of the present specification also provides a computer device comprising a memory and a processor. The memory stores a computer program. The processor executes the computer program to implement the photovoltaic high-voltage charging method in any of the above embodiments.

[0109] The embodiment of the present specification also provides a vehicle comprising the photovoltaic high-voltage charging system and / or device in any of the above embodiments.

[0110] In some embodiments, referring to Figure 8 , the computer device can be a terminal, and its internal structure diagram can be as shown in Figure 8 . The computer device comprises a processor, a memory, and a communication interface connected through a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The communication interface of the computer device is used to communicate with external terminals in wired or wireless mode. The wireless mode can be achieved through WIFI, operator network, NFC (near field communication) or other technologies. The computer program is executed by the processor to implement the photovoltaic high-voltage charging method.

[0111] It can be understood that the specific examples herein are only to help those skilled in the art better understand the embodiments of the present specification, and not to limit the scope of the present application.

[0112] It can be understood that in various embodiments of the present specification, the size of the serial number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present specification.

[0113] It can be understood that the various embodiments described in the present specification can be implemented alone or in combination, and the embodiments of the present specification do not limit this.

[0114] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. As used in this specification, the terms "may" and "can" include any one of, or a combination of, the corresponding inexcitables. As used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0115] It can be understood that the processor in the embodiments of the present specification can be an integrated circuit chip with processing capability of signals. In the implementation process, each step of the method embodiments described above can be completed by integrated logic circuits or instructions in the form of software in the processor. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Each method, step and logic block diagram disclosed in the embodiments of the present specification can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present specification can be directly embodied as a hardware coding processor to execute, or a combination of hardware and software modules in the coding processor. The software module can be located in a storage medium in the art such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, register, etc. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0116] It can be understood that the memory in the embodiments of the present specification can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be read only memory (ROM), programmable read only memory (PROM), erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM) or flash memory. The volatile memory can be random access memory (RAM). It should be noted that the memory of the system and method described herein is intended to include but not limited to these and any other suitable type of memory.

[0117] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software manner depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present specification.

[0118] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0119] The above is only a specific implementation of the present specification, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present specification, which should be covered within the protection scope of the present specification. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A photovoltaic high-voltage charging system for a vehicle, characterized in that, The photovoltaic high-voltage charging system includes: a power battery system, a high-voltage power distribution unit, and a photovoltaic control device; The power battery system includes a power battery, and the power battery system is provided with a first connection terminal and a second connection terminal for transmitting electrical energy with the high-voltage power distribution unit. The positive terminal of the power battery is connected to the first connection terminal, and the negative terminal of the power battery is connected to the second connection terminal. The high-voltage power distribution unit is provided with a third connection terminal and a fourth connection terminal for transmitting electrical energy to the power battery system. The third connection terminal is connected to the first connection terminal, and the fourth connection terminal is connected to the second connection terminal. The photovoltaic control device is capable of photovoltaic charging the power battery system. The photovoltaic control device includes a boost module electrically connected to the photovoltaic panel. The boost module includes a fifth connection terminal and a sixth connection terminal for power transmission. The fifth connection terminal is connected to the first connection terminal, and the sixth connection terminal is connected to the second connection terminal. The photovoltaic high-voltage charging system also includes a photovoltaic distribution box, which is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface. The first connection terminal, the third connection terminal, and the fifth connection terminal are respectively connected to the first connection point inside the photovoltaic distribution box through the first interface, the third interface, and the fifth interface; The second connection terminal, the fourth connection terminal, and the sixth connection terminal are respectively connected to the second connection point inside the photovoltaic distribution box through the second interface, the fourth interface, and the sixth interface; The photovoltaic control device is provided with a seventh interface and an eighth interface. The fifth connection terminal is connected to the fifth interface through the seventh interface, and the sixth connection terminal is connected to the sixth interface through the eighth interface. A photovoltaic contactor is provided between the first connection point and the fifth connection terminal, and / or the photovoltaic contactor is provided between the second connection point and the sixth connection terminal.

2. The system according to claim 1, characterized in that, The high-voltage power distribution unit includes a high-voltage power distribution contactor and an electrical component, wherein the high-voltage power distribution contactor and the electrical component are connected in series between the third connection terminal and the fourth connection terminal; The power battery system further includes at least one power battery contactor; wherein, the positive terminal of the power battery is connected to the first connection terminal through the power battery contactor, and / or, the negative terminal of the power battery is connected to the second connection terminal through the power battery contactor; The fifth connection terminal is connected to the first connection terminal via a photovoltaic contactor, and / or the sixth connection terminal is connected to the second connection terminal via the photovoltaic contactor.

3. The system according to claim 2, characterized in that, The at least one power battery contactor includes a main positive contactor and a main negative contactor. The positive terminal of the power battery is connected to the first connection terminal through the main positive contactor, and the negative terminal of the power battery is connected to the second connection terminal through the main negative contactor. The power battery system also includes a pre-charging circuit, which is connected in parallel with the main positive contactor. The pre-charging circuit includes a pre-charging contactor and a pre-charging resistor connected in series.

4. The system according to claim 2, characterized in that, One end of the high-voltage power distribution contactor is connected to the third connection terminal, and the electrical component is connected between the fourth connection terminal and the other end of the high-voltage power distribution contactor; The high-voltage power distribution unit also includes a bus capacitor, a main resistor module, and a backup resistor; wherein the bus capacitor is connected in parallel with the power-consuming component, the main resistor module is connected in parallel with the bus capacitor, and the backup resistor is connected in parallel with the bus capacitor; the main resistor module includes a main resistor and a discharge switch connected in series.

5. The system according to any one of claims 1-4, characterized in that, The photovoltaic control device is equipped with a ninth interface, a tenth interface, an eleventh interface, and a twelfth interface; The first connection end and the third connection end are respectively connected to the third connection point in the photovoltaic control device through the ninth interface and the eleventh interface; The second connection terminal and the fourth connection terminal are respectively connected to the fourth connection point in the photovoltaic control device through the tenth interface and the twelfth interface; The fifth connection end is connected to the third connection point, and the sixth connection end is connected to the fourth connection point; The photovoltaic contactor is provided between the third connection point and the fifth connection end, and / or the photovoltaic contactor is provided between the fourth connection point and the sixth connection end.

6. A photovoltaic high-voltage charging method for a vehicle, characterized in that, The photovoltaic control device is applied to the photovoltaic high-voltage charging system described in claim 1, wherein the photovoltaic high-voltage charging system further includes a power battery system; the method includes: When the photovoltaic charging conditions are met, a charging request signal is sent to the power battery system; If a photovoltaic charging permission instruction is received from the power battery system based on the charging request signal, the photovoltaic contactor is closed to at least perform photovoltaic charging on the power battery system. If the photovoltaic charging conditions are not met during the photovoltaic charging process of the power battery system, the photovoltaic contactor is disconnected.

7. The method according to claim 6, characterized in that, Before sending a charging request signal to the power battery system, the method further includes: Obtain the power supply status information of the vehicle; wherein the power supply status information is used to indicate whether the vehicle is in the ON or OFF position. When the power level information is OFF, a wake-up signal is sent to the power battery system; wherein, the wake-up signal is used to adjust the power battery system to a wake-up state capable of photovoltaic charging when the power battery system is in a dormant state.

8. The method according to claim 7, characterized in that, The charging request signal is used to request the power battery system, which is in the awakened state, to close the power battery contactor.

9. A vehicle, characterized in that, Includes the photovoltaic high-voltage charging system according to any one of claims 1-5.

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