Photovoltaic high-voltage charging system and method for vehicle and vehicle

Abstract

The invention provides a photovoltaic high-voltage charging system and method of a vehicle and the 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 a first connecting end and a second connecting end, the photovoltaic control device comprises a boosting module connected with a photovoltaic panel, and a fifth connecting end and a sixth connecting end of the boosting module are connected with the first connecting end and the second connecting end 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 a photovoltaic charging permission instruction fed back by the power battery system based on the charging request signal is received, a photovoltaic contactor is closed to carry out photovoltaic charging on the power battery system; in the photovoltaic charging process, if the photovoltaic charging condition is not met, the photovoltaic contactor is switched off, and therefore the effective controllability of photovoltaic high-voltage charging of the vehicle can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a photovoltaic high-voltage charging system, method and vehicle for a vehicle. Background Art

[0002] With the rapid development of electric vehicles, electric vehicle charging technology has 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 is green and environmentally friendly.

[0003] In the related technologies, electric vehicles are usually charged based on fixed photovoltaic power generation. After photovoltaic power generation is connected to the power grid, electric vehicles need to park at a fixed point and connect to the power grid through the power grid charging interface to charge the vehicle's power battery. Photovoltaic power generation is rarely used directly on vehicles, and is often low-voltage charging for low-voltage batteries. Low-voltage batteries serve the auxiliary low-voltage systems of vehicles, such as lighting, window lifting, audio and entertainment and other electrical equipment power supply.

[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 vehicle's power battery. Summary of the invention

[0005] In view of this, multiple embodiments of the present specification are directed to providing a photovoltaic high-voltage charging system, method and vehicle for a vehicle, so as to improve the effective controllability of photovoltaic high-voltage charging of the vehicle.

[0006] An embodiment of the present specification provides a photovoltaic high-voltage charging system for a vehicle, the photovoltaic high-voltage charging system comprising: a power battery system, a high-voltage distribution unit and a photovoltaic control device; the power battery system comprises a power battery, the power battery system is provided with a first connection terminal and a second connection terminal for transmitting electric energy with the high-voltage 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 distribution unit is provided with a third connection terminal and a fourth connection terminal for transmitting electric energy with 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 photovoltaically charging 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 terminal and a sixth connection terminal for electric energy transmission, the fifth connection terminal is connected to the first connection terminal, and the sixth connection terminal is connected to the second connection terminal.

[0007] In some embodiments, the high-voltage distribution unit includes a high-voltage distribution contactor and electrical components, and the high-voltage distribution contactor and the electrical components are connected in series between the third connection terminal and the fourth connection terminal; the power battery system also 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 through a photovoltaic contactor, and / or the sixth connection terminal is connected to the second connection terminal through the photovoltaic contactor.

[0008] In some embodiments, 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, and the pre-charging circuit includes a pre-charging contactor and a pre-charging resistor connected in series.

[0009] In some embodiments, one end of the high-voltage 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 distribution contactor; the high-voltage distribution unit also includes a bus capacitor, a main resistance module and a backup resistor; wherein 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 resistor is connected in parallel with the bus capacitor; the main resistance module includes a main resistor and a discharge switch connected in series.

[0010] In some embodiments, 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 end, the third connection end and the fifth connection end are respectively connected to the first connection point in the photovoltaic distribution box through the first interface, the third interface and the fifth interface; the second connection end, the fourth connection end and the sixth connection end are respectively connected to the second connection point in the photovoltaic distribution box through the second interface, the fourth interface and the sixth interface; 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 photovoltaic contactor is provided between the first connection point and the fifth connection end, and / or the photovoltaic contactor is provided between the second connection point and the sixth connection end.

[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 the 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 the 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 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.

[0012] The embodiment of the present specification provides a method for photovoltaic high-voltage charging of a vehicle, which is applied to a photovoltaic control device in a photovoltaic high-voltage charging system, wherein the photovoltaic high-voltage charging system also includes a power battery system; the method includes: when photovoltaic charging conditions are met, sending a charging request signal to the power battery system; if a photovoltaic charging permission instruction based on the charging request signal feedback from the power battery system is received, closing the photovoltaic contactor to at least perform photovoltaic charging on the power battery system; during the process of photovoltaic charging of the power battery system, if the photovoltaic charging conditions are not met, disconnecting the photovoltaic contactor.

[0013] In some embodiments, before sending a charging request signal to the power battery system, the method further includes: obtaining power gear information of the vehicle; wherein the power gear information is used to characterize the ON gear or OFF gear of the vehicle; when the power gear information is 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 to a wake-up state capable of photovoltaic charging when it is in a dormant state.

[0014] In some implementations, the charging request signal is used to request the power battery system in the awake state to close the power battery contactor.

[0015] An embodiment of the present specification provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the photovoltaic high-voltage charging method described in any of the above embodiments is implemented.

[0016] The embodiments of this specification provide a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the photovoltaic high-voltage charging method described in any of the above embodiments is implemented.

[0017] An embodiment of the present specification provides a vehicle, comprising the photovoltaic high-voltage charging system described in the above embodiment.

[0018] In multiple embodiments provided in this specification, the photovoltaic high-voltage charging system includes a power battery system, a high-voltage 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 terminal and a second connection terminal for transmitting electric energy with the high-voltage 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 distribution unit is provided with a third connection terminal and a fourth connection terminal for transmitting electric energy with 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 can perform photovoltaic charging on 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; wherein the fifth connection terminal is connected to the first connection terminal through a photovoltaic contactor, and / or the sixth connection terminal is connected to the second connection terminal through a photovoltaic contactor. In this way, the effective controllability of photovoltaic high-voltage charging of the vehicle power battery can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a photovoltaic high-voltage charging system provided in an embodiment of this specification;

[0020] Figure 2 A schematic diagram of a photovoltaic high-voltage charging system provided in an embodiment of this specification;

[0021] Figure 3 A schematic diagram of the process of the photovoltaic high-voltage charging method provided in the embodiment of this specification;

[0022] Figure 4 A schematic diagram of the process of the photovoltaic high-voltage charging method provided in the embodiment of this specification;

[0023] Figure 5 A schematic diagram of the process of the photovoltaic high-voltage charging method provided in the embodiment of this specification;

[0024] Figure 6 A schematic diagram of the process of the photovoltaic high-voltage charging method provided in the embodiment of this specification;

[0025] Figure 7 A schematic diagram of a photovoltaic control module provided for an embodiment of this specification;

[0026] Figure 8 A schematic diagram of a computer device provided for embodiments of the present specification. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of this specification, the technical solution in the implementation of this specification will be clearly and completely described below in conjunction with the drawings in the implementation of this specification. Obviously, the described implementation is only a part of the implementation of this specification, not all of the implementations. Based on the implementation in this specification, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0028] In the related technology, when photovoltaic power generation is applied to vehicle charging, photovoltaic power generation is often integrated into the power grid, and then the vehicle's power battery system is charged through the vehicle's power grid charging interface. Alternatively, the electric energy provided by photovoltaic power generation is directly used to charge the vehicle's low-voltage battery at a low voltage, so that the low-voltage battery can supply low-voltage electricity to electrical equipment such as lighting, window lifting, audio and 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 perform photovoltaic high-voltage charging on the power battery system when the vehicle is driving or parked, thereby improving the reliability of the vehicle's photovoltaic high-voltage charging.

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

[0031] Among them, the power battery system may refer to an energy storage device used to provide electrical energy to the vehicle. The power battery system may include a power battery and a power battery contactor. The power battery contactor is a contactor, relay or switch provided in the power battery system. The power battery system can provide electrical energy to the high-voltage electrical components of the vehicle based on the power battery.

[0032] Among them, the high-voltage distribution unit, also known as the power distribution unit (PDU), the high-voltage distribution unit or the vehicle high-voltage PDU, can be used to distribute and manage electrical energy for the electrical equipment and other electrical components of the vehicle. The photovoltaic control device, also known as the solar charge unit (SCU) or the solar controller unit (SCU), can realize the conversion of solar energy into electrical energy by connecting to the on-board photovoltaic panel, and charge the power battery system with the electrical energy provided by the photovoltaic panel.

[0033] Specifically, see Figure 1 , Figure 1A schematic diagram of a photovoltaic high-voltage charging system provided in an embodiment of the present specification, wherein the power battery system may include a power battery, and the power battery system is provided with a first connection terminal 110 and a second connection terminal 120 for transmitting electric energy with a high-voltage distribution unit, the positive terminal of the power battery is connected to the first connection terminal 110, and the negative terminal of the power battery is connected to the second connection terminal 120.

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

[0035] Please continue reading 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 the photovoltaic panel and a plurality of photovoltaic contactors. The boost module includes a fifth connection terminal 150 and a sixth connection terminal 160 for power transmission. The fifth connection terminal 150 is connected to the first connection terminal 110, and the sixth connection terminal 160 is connected to the second connection terminal 120. The fifth connection terminal 150 is connected to the first connection terminal 110 through the photovoltaic contactor 2, and / or the sixth connection terminal 160 is connected to the second connection terminal 120 through the photovoltaic contactor 1.

[0036] In the above-mentioned embodiment, by setting a photovoltaic control device in the vehicle high-voltage architecture including a power battery system and a high-voltage distribution unit, when the vehicle needs to be charged, photovoltaic high-voltage charging can be performed for the power battery system and / or the high-voltage distribution unit in the vehicle high-voltage architecture through the corresponding connection terminals.

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

[0038] In this embodiment, the high voltage power distribution unit PDU may further include a bus capacitor, a main resistor module and a backup resistor. Figure 1The main resistance module includes a main resistance and a discharge switch connected in series, C represents the bus capacitor, R represents the main resistance, and R represents the standby resistance. The bus capacitor is connected in parallel with the electrical components, the main resistance module is connected in parallel with the bus capacitor, and the standby resistance is connected in parallel with the bus capacitor.

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

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

[0041] For example, please refer to Figure 1 The power battery system may further include a pre-charging circuit, which is connected in parallel with the main positive contactor, and the pre-charging circuit includes a pre-charging contactor and a pre-charging resistor connected in series.

[0042] In the above implementation, based on the power battery system and the high-voltage distribution unit in the vehicle high-voltage architecture, the photovoltaic control device is connected through the corresponding connection terminals and connection ports, so that photovoltaic high-voltage charging can be performed through the photovoltaic control device.

[0043] For example, the power battery system may also include a power battery management system (Battery Management System, BMS), a power battery distribution unit (Battery Distribution Unit, BDU), a power battery manual service disconnect (Manual Service Disconnect, MSD), etc. Among them, BMS and BDU can distribute, protect and manage the power energy of the power battery to ensure the safe and efficient operation of the power battery system. MSD can serve as a safety device for the entire photovoltaic high-voltage charging system.

[0044] In some embodiments, please refer to Figure 1The photovoltaic high-voltage charging system may further include a photovoltaic distribution box, which may 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 terminal 110, the third connection terminal 130 and the fifth connection terminal 150 are respectively 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. The second connection terminal 120, the fourth connection terminal 140 and the sixth connection terminal 160 are respectively 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.

[0046] The photovoltaic control device is provided with a seventh interface 207 and an eighth interface 208, the fifth connection terminal 150 is connected to the fifth interface 205 through the seventh interface 207, and the sixth connection terminal 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 may refer to physical interfaces for electrical connection.

[0047] Exemplarily, the first connection point and the second connection point may refer to a busbar or a connection point between a plurality of connection terminals, which may be located on an interface or may be located on a copper bus, a connection line, a conductor or a high-voltage line between interfaces.

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

[0049] In the above embodiment, on the basis of the power battery system and the high-voltage distribution unit of the vehicle's high-voltage architecture, a photovoltaic distribution box is arranged between the power battery system and the high-voltage distribution unit, and the photovoltaic distribution box is connected to the photovoltaic control device. In this way, the high-voltage electricity of the photovoltaic control device can be connected to the high-voltage power circuit of the whole vehicle through the photovoltaic distribution box, thereby realizing the utilization of photovoltaic power and improving the degree of commonality and platformization of parts for vehicle application of photovoltaic high-voltage charging. At the same time, this embodiment can realize photovoltaic high-voltage charging by only changing the high-voltage line in the photovoltaic distribution box without changing the high-voltage architecture between the power battery system and the high-voltage distribution unit, making the layout more convenient and the cost lower.

[0050] In some embodiments, the photovoltaic high-voltage charging system may not be equipped with a photovoltaic distribution box, but the photovoltaic control device is set between the power battery system and the high-voltage distribution unit in the vehicle high-voltage architecture through a corresponding interface. Figure 2 The photovoltaic control device may 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 may refer to physical interfaces for electrical connection.

[0051] The first connection terminal 110 and the third connection terminal 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 terminal 150 is connected to the third connection point. The second connection terminal 120 and the fourth connection terminal 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 terminal 160 is connected to the fourth connection point.

[0052] Exemplarily, the third connection point and the fourth connection point may refer to a busbar or a connection point between a plurality of connection terminals, which may be located on an interface or may be located on a copper bus, a connection line, a conductor or a high-voltage line between interfaces.

[0053] Specifically, a photovoltaic contactor is provided between the third connection point and the fifth connection terminal 150, or a photovoltaic contactor is provided between the fourth connection point and the sixth connection terminal 160, or a photovoltaic contactor is provided between the third connection point and the fifth connection terminal 150 and a photovoltaic contactor is provided between the fourth connection point and the sixth connection terminal 160. As an example, please continue to refer to Figure 2 A photovoltaic contactor 2 may be disposed between the third connection point and the fifth connection terminal 150 , and a photovoltaic contactor 1 may be disposed between the fourth connection point and the sixth connection terminal 160 .

[0054] In the above embodiment, on the basis of the power battery system and the high-voltage distribution unit of the vehicle's high-voltage architecture, the photovoltaic control device is directly connected between the power battery system and the high-voltage distribution unit, so that the high-voltage electricity of the photovoltaic control device can be connected to the high-voltage power circuit of the whole vehicle. Compared with being connected to the high-voltage power circuit of the whole vehicle through a photovoltaic distribution box, the photovoltaic control device SCU of this embodiment has a higher degree of integration and a simpler and more compact structure. In this way, this embodiment can achieve photovoltaic high-voltage charging by only changing the high-voltage line without changing the high-voltage architecture between the power battery system and the high-voltage distribution unit, making the layout more convenient and the cost lower.

[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 circuit between the power battery system and the high-voltage power distribution unit, when the high-voltage power circuit is connected, each power-consuming component in the high-voltage power circuit is powered on. Figure 1 or Figure 2 , when the photovoltaic control device SCU is not connected to the high-voltage power circuit between the power battery system and the high-voltage distribution unit, its power-on process can be: close the main positive contactor in the high-voltage distribution unit PDU and close the main negative contactor in the power battery system, and then close the pre-charge contactor, so that the power battery charges the bus capacitor C. After it is full, close the main positive contactor in the power battery system, and then disconnect the pre-charge contactor, and the electrical components of the whole vehicle work normally. In this way, by closing the pre-charge contactor before closing the main positive contactor in the power battery system, the electrical components in the high-voltage power circuit can be buffered and protected based on the pre-charge resistance. The power-off process is: disconnect the main positive contactor in the high-voltage distribution unit PDU and the main positive contactor in the power battery system, then disconnect the main negative contactor, and then close the discharge switch, and the electric energy in the bus capacitor C is discharged through the main resistance module. The discharge duration is about 2 seconds. If the main resistance module is damaged, it can be discharged through the backup resistance, which lasts about 5 minutes. In this way, the high-voltage electrical components can be buffered and protected by charging and discharging the bus capacitor.

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

[0057] This specification provides a method for photovoltaic high-voltage charging of a vehicle. Figure 3 , Figure 3It is a flow chart of a photovoltaic high-voltage charging method for a vehicle provided in this embodiment. This embodiment provides method operation steps as shown in the flow chart, but may include more or fewer operation steps based on conventional or non-creative labor. The sequence of steps listed in the embodiment is only one execution method among many step execution sequences, and does not represent the only execution sequence. When the actual system or server product is executed, it can be executed sequentially or in parallel according to the method shown in the embodiment (for example, a parallel processor or a multi-threaded processing environment). The photovoltaic high-voltage charging method can be applied to a photovoltaic control device in a photovoltaic high-voltage charging system, such as Figure 3 As shown, the photovoltaic high-voltage charging method may include the following steps.

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

[0059] In some cases, please continue to see Figure 1 and Figure 2 In the photovoltaic high-voltage charging system, the photovoltaic control unit SCU can exchange information with the vehicle's high-voltage PDU and the power battery management system BMS in the power battery system.

[0060] Specifically, see Figure 4 , the photovoltaic control unit SCU can determine whether the photovoltaic charging conditions are met based on its own state, the interactive information with the vehicle high-voltage PDU and the power battery management system BMS. If the photovoltaic charging conditions are 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. Exemplarily, when determining whether the photovoltaic charging conditions are met, its own state may include but is not limited to photovoltaic power generation power, light intensity, etc., and the interactive information with the battery management system BMS may include the power of the power battery. Of course, it is understandable that, according to actual conditions, the type of interactive information used to determine whether the photovoltaic charging conditions are met can be determined according to actual conditions.

[0061] Step S320: If a photovoltaic charging permission instruction based on the charging request signal feedback from the power battery system is received, the photovoltaic contactor is closed to perform photovoltaic charging on at least the power battery system.

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

[0063] For details, please continue to see Figure 4 , the photovoltaic control unit SCU can close the photovoltaic contactor to at least enable photovoltaic high-voltage charging to the power battery system when receiving the photovoltaic charging permission instruction sent by the power battery management system BMS. For example, please continue to refer to Figure 1 or Figure 2 , photovoltaic contactor 1 and photovoltaic contactor 2 can be closed, and the photovoltaic contactor can be connected to the high-voltage power circuit to at least realize photovoltaic high-voltage charging of the power battery system.

[0064] Step S330: During photovoltaic charging of the power battery system, if the photovoltaic charging condition is not met, disconnect the photovoltaic contactor.

[0065] For details, please continue to see Figure 4 In the process of photovoltaic charging the power battery system, the photovoltaic control device SCU determines in real time whether the photovoltaic charging conditions are met. If the photovoltaic charging conditions are met, the photovoltaic high-voltage charging continues. If the photovoltaic charging conditions are not met, the photovoltaic contactor in the SCU is disconnected to stop the photovoltaic high-voltage charging. For example, please continue to refer to Figure 1 or Figure 2 If the photovoltaic charging conditions are not met, photovoltaic contactor 1 and photovoltaic contactor 2 can be disconnected to stop photovoltaic high-voltage charging.

[0066] In the above-mentioned embodiment, based on the photovoltaic high-voltage charging system, a photovoltaic control device SCU is used to determine whether the photovoltaic charging conditions are met. When the photovoltaic charging conditions are met, a charging request signal is sent to the power battery system, and when a photovoltaic charging permission instruction based on the charging request signal feedback from the power battery system is received, the photovoltaic contactor is closed to at least perform photovoltaic charging on the power battery system. During the process of photovoltaic charging of the power battery system, if the photovoltaic charging conditions are not met, the photovoltaic contactor is disconnected. In this way, the effective controllability of the vehicle's photovoltaic high-voltage charging is improved.

[0067] In some embodiments, see Figure 5 Before sending a charging request signal to the power battery system, the photovoltaic high-voltage charging method may further include the following steps S510-S520.

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

[0069] In some cases, the ON position indicates that the vehicle key is turned on, and the OFF position indicates that the vehicle key is turned off. When the vehicle is in the ON position, the power battery contactor and the high-voltage distribution contactor are in a closed state, and when the vehicle is in the OFF position, the power battery contactor and the high-voltage distribution contactor are in a disconnected state.

[0070] In some cases, when the vehicle is driving, the power battery management system BMS in the power battery system is in an awake state, and when the vehicle is parked or in a parking state, the power battery management system BMS in the power battery system may be in a dormant state or an awake state. Therefore, in order to enable photovoltaic high-voltage charging to the power battery system when the vehicle is parked or in a parking state, it is necessary to determine the power gear information of the vehicle and the dormant or awake state of the power battery system to determine whether photovoltaic high-voltage charging can be performed.

[0071] Specifically, see Figure 6 Before the photovoltaic control device SCU sends a charging request signal to the power battery system, the photovoltaic control device SCU can obtain the power level information of the vehicle and determine whether the power battery system needs to be awakened based on the power level 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. If the photovoltaic contactor is closed at this time, the high-voltage power circuit between the photovoltaic control unit SCU and the power battery system is connected, and the power battery management system BMS in the power battery system is in the awake state, and 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 power battery management system BMS in the power battery system may be in a dormant state. At this time, it is necessary to wake up the power battery management system BMS, and after waking up the power battery management system BMS, the power battery contactor of the power battery system is closed through the power battery management system BMS. In this way, when the photovoltaic contactor is closed, the high-voltage power circuit between the photovoltaic control unit SCU and the power battery system is connected.

[0074] Step S520: When the power gear 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.

[0075] Specifically, when the photovoltaic charging conditions are met, if the power gear information is OFF, the photovoltaic control device 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 dormant state to the awakened state when it is in the dormant state, and send a charging request signal to the BMS after sending the wake-up signal. Exemplarily, the charging request signal can be used to request the BMS in the power battery system that is in the awakened state to close the power battery contactor.

[0076] For example, when the photovoltaic charging conditions are met, if the power gear information is ON, it means that the BMS is in the awake state. At this time, the photovoltaic control device SCU can directly send a charging request signal to the BMS.

[0077] In the above embodiment, the photovoltaic control device obtains the power gear information representing the ON gear or OFF gear of the vehicle, and sends a wake-up signal to the power battery system when the power gear information is OFF gear, so that the BMS in the power battery system is adjusted to a wake-up state capable of photovoltaic charging when it is in a dormant state. In this way, photovoltaic high-voltage charging of the vehicle can be realized when the vehicle is in the OFF gear, thereby improving the effective controllability of photovoltaic high-voltage charging of the vehicle.

[0078] This specification provides a photovoltaic high-voltage charging method, which can be applied to a photovoltaic high-voltage charging system. Figure 4 , the photovoltaic high-voltage charging method may include the following steps.

[0079] Step S601: Determine whether photovoltaic charging conditions are met.

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

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

[0082] Step S603: After receiving the charging request signal, the power battery management system BMS sends a response instruction to allow photovoltaic charging 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 is connected to the high-voltage power circuit and performs photovoltaic high-voltage charging on the power battery in the power battery system.

[0084] Exemplarily, when the vehicle gear position information is ON, the high-voltage power distribution unit PDU and the photovoltaic control device SCU are also connected. At this time, the photovoltaic control device can provide photovoltaic high-voltage power supply to the high-voltage power distribution unit.

[0085] For example, during the photovoltaic high-voltage charging process, if the photovoltaic charging conditions are not met, the SCU can disconnect the photovoltaic contactor in the SCU and send a stop charging request signal to the BMS, and the photovoltaic high-voltage charging ends.

[0086] This specification provides a photovoltaic high-voltage charging method, which can be applied to a photovoltaic high-voltage charging system. Figure 6 , the photovoltaic high-voltage charging method may include the following steps.

[0087] Step S701: Determine whether photovoltaic charging conditions are met.

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

[0089] For example, when the vehicle gear information is OFF, the power battery contactor and the high-voltage distribution contactor are in a disconnected state, and the BMS may be in a dormant state.

[0090] Step S703: If the BMS in the sleep state receives a wake-up signal sent by the SCU, the BMS is adjusted to the 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 response instruction to allow photovoltaic charging to the photovoltaic control device.

[0093] For example, since the power battery contactor is disconnected when the power gear information is OFF, the BMS may close the power battery contactor after receiving the charging request signal.

[0094] Step S706: After receiving the instruction to allow photovoltaic charging, the SCU closes the photovoltaic contactor in the SCU, so that the photovoltaic control device is connected to the high-voltage power circuit and performs photovoltaic high-voltage charging on the power battery in the power battery system.

[0095] For example, when the vehicle gear information is OFF, the high-voltage power distribution unit PDU is disconnected from the photovoltaic control device SCU. 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 conditions are not met, the SCU may disconnect the photovoltaic contactor in the SCU and may send a stop charging request signal to the BMS.

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

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

[0099] In the above implementation, when the power gear information is OFF, since the high-voltage distribution contactor of the high-voltage power distribution unit PDU is disconnected, the electrical components in the high-voltage power circuit are not powered by high-voltage electricity. In this way, when the vehicle is charged with photovoltaic high voltage when the power gear information is OFF, the safety of various high-voltage electrical components can be guaranteed, further improving the effective controllability of the vehicle's photovoltaic high-voltage charging.

[0100] This specification provides a photovoltaic control module. Figure 7 , a photovoltaic control device applied to a photovoltaic high-voltage charging system, the photovoltaic high-voltage charging system also includes a power battery system; the photovoltaic control module may include a charging request submodule 810, a first control submodule 820 and a second control submodule 830.

[0101] The charging request submodule 810 is used to send a charging request signal to the power battery system when the photovoltaic charging conditions are 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 a photovoltaic charging permission instruction based on the charging request signal feedback from the power battery system is received;

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

[0104] In some embodiments, the charging request submodule is also used to: obtain the power gear information of the vehicle before sending a charging request signal to the power battery system; wherein the power gear information is used to characterize the ON gear or OFF gear of the vehicle; when the power gear information is OFF gear, send a wake-up signal 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 it is in a dormant state.

[0105] The specific functions and effects achieved by the photovoltaic control module can be explained in other embodiments of this specification, and will not be repeated here. Each submodule in the photovoltaic control module can be implemented in whole or in part by software, hardware, or a combination thereof. Each submodule can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0106] The embodiments of the present specification also provide a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a computer, the computer executes the photovoltaic high-voltage charging method in any of the above embodiments.

[0107] The embodiments of this specification also provide a computer program product including instructions, and when the instructions are executed by a computer, the photovoltaic high-voltage charging method in any of the above embodiments is executed.

[0108] The embodiments of the present specification also provide a computer device, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the photovoltaic high-voltage charging method in any of the above embodiments is implemented.

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

[0110] In some embodiments, see Figure 8 The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 8 As shown. The computer device includes a processor, a memory, and a communication interface connected via a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes 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 operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a photovoltaic high-voltage charging method is implemented.

[0111] It should be understood that the specific examples herein are only intended to help those skilled in the art to better understand the embodiments of the present specification, rather than to limit the scope of the present invention.

[0112] It can be understood that in the various implementations of this specification, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation methods of this specification.

[0113] It can be understood that the various embodiments described in this specification can be implemented individually or in combination, and the embodiments of this specification are not limited to this.

[0114] Unless otherwise specified, all technical and scientific terms used in the embodiments of this specification have the same meaning as those generally understood by those skilled in the art of the technical field of this specification. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the scope of this specification. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. The singular forms of "a", "above", and "the" used in the embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0115] It can be understood that the processor of the embodiment of this specification can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method implementation can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiment of this specification can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of this specification can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

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

[0117] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this specification.

[0118] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method implementation methods and will not be repeated here.

[0119] The above is only a specific implementation of this specification, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this specification, which should be included in the protection scope of this specification. Therefore, the protection scope of the present invention should be based on 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 comprises a power battery, and the power battery system is provided with a first connection terminal and a second connection terminal for transmitting electric 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 electric energy with 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 performing photovoltaic charging on 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 electric energy transmission. The fifth connection terminal is connected to the first connection terminal, and the sixth connection terminal is connected to the second connection terminal.

2. The system according to claim 1, characterized in that The high-voltage power distribution unit comprises 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 comprises 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 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.

3. The system according to claim 2, characterized in that 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 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 further includes a pre-charging circuit, which is connected in parallel with the main positive contactor, and 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 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 also includes a bus capacitor, a main resistor module and a backup resistor; wherein the bus capacitor is connected in parallel with the electrical 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 to 4, characterized in that: The photovoltaic high-voltage charging system further 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 end, the third connection end and the fifth connection end are connected to the first connection point in the photovoltaic 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 the second connection point in the photovoltaic 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 photovoltaic contactor is provided between the first connection point and the fifth connection end, and / or the photovoltaic contactor is provided between the second connection point and the sixth connection end.

6. The system according to any one of claims 1 to 4, characterized in that: 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.

7. A photovoltaic high-voltage charging method for a vehicle, characterized in that: A photovoltaic control device applied to a photovoltaic high-voltage charging system, wherein the photovoltaic high-voltage charging system also includes a power battery system; the method includes: When the photovoltaic charging conditions are met, sending a charging request signal to the power battery system; If a photovoltaic charging permission instruction is received from the power battery system based on the charging request signal, closing the photovoltaic contactor to at least perform photovoltaic charging on the power battery system; During photovoltaic charging of the power battery system, if the photovoltaic charging condition is not met, the photovoltaic contactor is disconnected.

8. The method according to claim 7, characterized in that Before sending a charging request signal to the power battery system, the method further includes: Acquire power gear information of the vehicle; wherein the power gear information is used to represent the ON gear or OFF gear of the vehicle; When the power gear 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.

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

10. A vehicle, characterized in that: A photovoltaic high-voltage charging system comprising any one of claims 1-6.

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