Direct-current charging high-voltage circuit and control method thereof, land vehicle and land-air split type flying vehicle

Abstract

The application provides a DC charging high-voltage circuit, a control method thereof, a land vehicle and a land-air split type flying vehicle. The DC charging high-voltage circuit comprises a high-voltage connector, a fast charging switch circuit and a land power supply module. The land power supply module has a split switch circuit for controlling the connection or disconnection of the high-voltage connector and the fast charging switch circuit. The land power supply module is electrically connected to the high-voltage connector, and the high-voltage connector is used for plugging with an air power supply module. The fast charging switch circuit is connected in series between charging pile split switch circuits. When receiving a charging request of the air power supply module, the land power supply module controls the split switch circuit and the fast charging switch circuit to be turned on, and requests the charging pile to output a corresponding charging voltage according to the charging parameter of the air power supply module, and outputs the charging voltage to the air power supply module through the high-voltage connector. The application can realize the fast charging function of the flying vehicle in the land-air split type flying vehicle with the design goals of low cost and light weight.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a direct-current charging high-voltage circuit and a control method thereof, a land vehicle and a land-air split type flying vehicle. BACKGROUND

[0002] The land-air split type flying vehicle is composed of a flying vehicle and a land vehicle, and can operate as two independent parts or as a combination. The flying vehicle is designed to be lightweight, and the battery capacity is not too high, so there are many scenarios that require fast energy replenishment. Therefore, the fast charging function is particularly important. To achieve this function, a fast charging relay, a fast charging wire harness, a fast charging interface, etc. need to be added to the flying vehicle, which greatly increases the use cost and the weight of the whole machine. SUMMARY

[0003] The main purpose of the present application is to provide a direct-current charging high-voltage circuit and a control method thereof, a land vehicle and a land-air split type flying vehicle, which aims to realize the charging compatibility between the flying vehicle and the charging pile.

[0004] The present application provides a direct-current charging high-voltage circuit for a land vehicle of a flying vehicle. The flying vehicle includes a land vehicle and a flying vehicle. The direct-current charging high-voltage circuit includes a high-voltage connector, a fast charging switch circuit and a land power supply module. The land power supply module has a split switch circuit for controlling the connection or disconnection of the high-voltage connector and the fast charging switch circuit. The land power supply module is electrically connected to the high-voltage connector, which is used for plugging with an air power supply module. The input end of the fast charging switch circuit is connected to the first end of the charging pile, the output end of the fast charging switch circuit is connected to the first input end of the split switch circuit, and the second input end of the split switch circuit is connected to the second end of the charging pile. The land power supply module is used for controlling the split switch circuit and the fast charging switch circuit to be turned on when receiving a charging request of the air power supply module, and the battery of the land power supply module is powered down at high voltage. When the positive signal of the low-voltage auxiliary power supply of the charging pile is identified to be valid, the charging pile is charged, the charging parameter of the air power supply module is requested to output the corresponding charging voltage, and the charging voltage is output to the air power supply module through the high-voltage connector.

[0005] In an embodiment, the land power supply module is further configured to, when receiving an insulation detection signal of the charging pile, enter a closed insulation detection state, control the aerial power supply module to enter the closed insulation detection state, and control the fast charging switch circuit and the split switch circuit to be closed; when receiving an insulation detection completion signal of the charging pile, perform high-voltage power-off on the battery of the aerial power supply module; control the fast charging switch circuit and the split switch circuit to be opened, and perform pre-charging on the aerial power supply module; when the aerial power supply module completes pre-charging, control the aerial power supply module to enter an open insulation detection state; when the aerial power supply module completes insulation detection, perform the method steps of requesting the charging pile to output a corresponding charging voltage according to the charging parameters of the aerial power supply module, and outputting the charging voltage to the aerial power supply module through the high-voltage connector.

[0006] In an embodiment, the land power supply module is further configured to, when receiving a charging end request of the aerial power supply module, and when the land power supply module meets a charging condition, perform high-voltage power-off on the battery of the aerial power supply module, and control the split switch circuit to be closed; perform pre-charging on the land power supply module, when the land power supply module completes pre-charging, perform high-voltage power-on on the battery of the land power supply module, request the charging pile to output a corresponding charging voltage according to the charging parameters of the land power supply module, and output the charging voltage to the battery of the land power supply module; and / or, the land power supply module is further configured to, when receiving a charging end request of the aerial power supply module, and when the land power supply module does not meet the charging condition, control the fast charging switch circuit to be closed.

[0007] In an embodiment, the land power supply module includes a first control circuit and an automobile battery pack, and the air power supply module includes a second control circuit and an air battery pack; the first control circuit is connected with the second control circuit, a charging pile, a fast charging switch circuit and a split switch circuit respectively, the high-voltage connector is connected with the automobile battery pack and the split switch circuit respectively, and the air battery pack is connected with the split switch circuit; the first control circuit is configured to, when receiving a charging request of the second control circuit, turn off the automobile battery pack under high voltage, and when identifying that a positive signal of a low-voltage auxiliary power supply of the charging pile is valid, send a charging parameter requirement of the air power supply module to the charging pile; when receiving an insulation detection signal of the charging pile, enter an insulation detection off state, control the second control circuit to enter the insulation detection off state, and control the fast charging switch circuit and the split switch circuit to be turned off; when receiving an insulation detection completion signal of the charging pile, control the second control circuit to turn off the air battery pack under high voltage; control the fast charging switch circuit and the split switch circuit to be turned on, and control the second control circuit to pre-charge the air battery pack; when the air battery pack completes pre-charging, control the second control circuit to enter an insulation detection on state; when the second control circuit completes insulation detection, request the charging pile to output a corresponding charging voltage according to the charging parameter of the air battery pack, and output the charging voltage to the air battery pack through the high-voltage connector; when receiving a charging end request of the second control circuit, and when the automobile battery pack meets a charging condition, control the second control circuit to turn off the air battery pack under high voltage, and control the split switch circuit to be turned off; pre-charge the automobile battery pack, turn on the automobile battery pack under high voltage when the automobile battery pack completes pre-charging, and request the charging pile to output a corresponding charging voltage according to the charging parameter of the automobile battery pack, and output the charging voltage to the automobile battery pack.

[0008] In an embodiment, the fast charging switch circuit includes a fast charging relay, an input end of the fast charging relay is connected with a first end of the charging pile, an output end of the fast charging relay is connected with a first input end of the split switch circuit, the fast charging relay is connected with the first control circuit, a fast charging interface, a first end of the fast charging interface is connected with the first end of the charging pile, a second end of the fast charging interface is connected with a second end of the charging pile, a third end of the fast charging interface is connected with the input end of the fast charging relay, and a fourth end of the fast charging interface is connected with a second input end of the split switch circuit; the first control circuit is configured to, when receiving an insulation detection signal of the charging pile, control the fast charging relay to be turned off, and control the fast charging relay to be turned on when the air battery pack is turned off under high voltage.

[0009] In an embodiment, the aerial power supply module further comprises: a first DC converter, a first end of the first DC converter is connected with the positive pole of the aerial battery pack, and a second end of the first DC converter is connected with the negative pole of the aerial battery pack; the second control circuit is configured to control the second DC converter to output a DC voltage to the aerial battery pack, so as to pre-charge the aerial battery pack.

[0010] In an embodiment, the aerial power supply module further comprises: a first pre-charge relay, a first end of the first pre-charge relay is connected with the positive pole of the aerial battery pack, and a second end of the second pre-charge relay is connected with the high-voltage connector; the second control circuit is configured to control the first pre-charge relay to be closed, so as to control the aerial battery pack to pre-charge the high-voltage loop of the aerial power supply module.

[0011] In an embodiment, the aerial power supply module further comprises: a first switch circuit, the first switch circuit is connected in series between the high-voltage connector and the positive pole of the aerial battery pack; a second switch circuit, the second switch circuit is connected in series between the high-voltage connector and the negative pole of the aerial battery pack; the second control circuit is configured to control the first switch circuit and the second switch circuit to be disconnected when the aerial battery pack is powered off, and control the first switch circuit and the second switch circuit to be conducted when the aerial battery pack is powered on.

[0012] In an embodiment, the land power supply module further comprises: a second DC converter, a first end of the second DC converter is connected with the positive pole of the automobile battery pack, and a second end of the first DC converter is connected with the negative pole of the automobile battery pack; the first control circuit is configured to control the second DC converter to output a DC voltage to the automobile battery pack, so as to pre-charge the automobile battery pack.

[0013] In an embodiment, the aerial power supply module further comprises: a second pre-charge relay, a first end of the second pre-charge relay is connected with the high-voltage connector, and a second end of the second pre-charge relay is connected with the positive pole of the automobile battery pack; the first control circuit is configured to control the second pre-charge relay to be closed, so as to control the automobile battery pack to pre-charge the high-voltage loop of the land power supply module.

[0014] In an embodiment, the land power supply module further comprises: a third switch circuit connected in series between the high-voltage connector and the positive pole of the automobile battery pack; a fourth switch circuit connected in series between the high-voltage connector and the negative pole of the automobile battery pack; and the first control circuit is configured to control the third and fourth switch circuits to be disconnected when the automobile battery pack is powered off, and to control the third and fourth switch circuits to be connected when the automobile battery pack is powered on.

[0015] In an embodiment, the first control circuit is further configured to detect the front-end voltage and the back-end voltage of the first switch circuit through the second control circuit, and to determine that the first switch circuit is successfully disconnected when the difference between the front-end voltage and the back-end voltage is greater than a first preset voltage.

[0016] In an embodiment, the first control circuit is further configured to detect the front-end voltage and the back-end voltage of the third switch circuit, and to determine that the third switch circuit is successfully disconnected when the difference between the front-end voltage and the back-end voltage is greater than a second preset voltage.

[0017] In an embodiment, the land power supply module is further configured to detect the temperature of the charging pile, to limit the charging current of the charging pile when the temperature exceeds a first preset temperature, and to control the fast-charging switch circuit to be disconnected when the temperature exceeds a second preset temperature.

[0018] The application also provides a direct-current charging high-voltage circuit control method for a land automobile of a flying automobile, wherein the flying automobile comprises a land automobile and an aircraft, the direct-current charging high-voltage circuit comprises a high-voltage connector, a fast-charging switch circuit, and a land power supply module, the land power supply module has a split switch circuit for controlling the connection or disconnection of the high-voltage connector and the fast-charging switch circuit, the land power supply module is electrically connected to the high-voltage connector, the high-voltage connector is used for plugging with an air power supply module, the input end of the fast-charging switch circuit is connected to the first end of the charging pile, the output end of the fast-charging switch circuit is connected to the first input end of the split switch circuit, and the second input end of the split switch circuit is connected to the second end of the charging pile; the method comprises the following steps: when receiving a charging request of the air power supply module, controlling the split switch circuit and the fast-charging switch circuit to be turned on, and performing high-voltage power-off on the battery of the land power supply module; when identifying that the positive pole signal of the low-voltage auxiliary power supply of the charging pile is valid, performing a charging handshake with the charging pile, requesting the charging pile to output a corresponding charging voltage according to the charging parameter of the air power supply module, and outputting the charging voltage to the air power supply module through the high-voltage connector.

[0019] The application further provides a land vehicle comprising the direct-current charging high-voltage circuit.

[0020] The application further provides a land-air split type flying vehicle comprising the flying vehicle and the land vehicle.

[0021] The application provides a direct-current charging high-voltage circuit, a control method thereof, a land vehicle and a land-air split type flying vehicle. The flying vehicle comprises the land vehicle and a flying vehicle. The direct-current charging high-voltage circuit comprises a high-voltage connector, a fast charging switch circuit and a land power supply module. The land power supply module has a split switch circuit for controlling the connection or disconnection of the high-voltage connector and the fast charging switch circuit. The land power supply module is electrically connected with the high-voltage connector, and the high-voltage connector is used for plugging with an air power supply module. An input end of the fast charging switch circuit is used for connecting with a charging pile, and an output end of the fast charging switch circuit is electrically connected with the land power supply module. In actual application, when receiving an insulation detection signal of the charging pile, the land power supply module enters an insulation detection closing state, and controls the air power supply module to enter the insulation detection closing state, and controls the fast charging switch circuit and the split switch circuit to be closed. When receiving an insulation detection completion signal of the charging pile, the battery of the air power supply module is powered down under high voltage. The fast charging switch circuit and the split switch circuit are controlled to be opened, and the air power supply module is pre-charged. When the air power supply module completes the pre-charging, the air power supply module is controlled to enter an insulation detection opening state. When the air power supply module completes the insulation detection, the charging pile is requested to output a corresponding charging voltage according to the charging parameter of the air power supply module, and the charging voltage is output to the air power supply module through the high-voltage connector. The application optimizes the control logic of the flying vehicle, reduces the probability of fast charging insulation failure of the flying vehicle, and improves the fast charging experience by the closing timing of the split switch circuit and the fast charging switch circuit when the charging pile performs insulation detection. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0023] Figure 1 The circuit flow chart of the direct-current charging high-voltage circuit of the application;

[0024] Figure 2 The circuit structure diagram of the land-air split type flying vehicle of the application;

[0025] Figure 3 The circuit structure diagram of another embodiment of the land-air split type flying vehicle of the application.

[0026] The objectives, functional characteristics and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0028] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In addition, the description such as "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that the technical solutions can be realized by those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0031] The land-air split type flying car is composed of two parts of the aircraft and the car, which can run as two independent parts or as a combined whole. The aircraft considers lightweight design, and the battery capacity is not too high, so there are many scenes that need to be quickly charged. The fast charging function is particularly important, and to achieve this function, a fast charging relay, a fast charging wire harness, a fast charging interface, etc. need to be added to the aircraft end, which will greatly increase the use cost and the weight of the whole machine.

[0032] Therefore, in order to realize the fast charging function and lightweight design of the aircraft in the land-air separated type flying car, the application provides a direct current charging high voltage circuit for a land vehicle of a flying car, the flying car comprising a land vehicle and an aircraft, referring to Figure 1 , the direct current charging high voltage circuit comprises:

[0033] The high voltage connector 30, the fast charging switch circuit 10 and the land power supply module 20 have a separated switch circuit for controlling the connection or disconnection of the high voltage connector 30 and the fast charging switch circuit 10;

[0034] The land power supply module 20 is electrically connected with the high voltage connector 30, and the high voltage connector 30 is used for plugging with the air power supply module;

[0035] The input end of the fast charging switch circuit 10 is connected with the first end of the charging pile, the output end of the fast charging switch circuit 10 is connected with the first input end of the separated switch circuit, and the second input end of the separated switch circuit is connected with the second end of the charging pile;

[0036] The land power supply module 20 is used for controlling the separated switch circuit and the fast charging switch circuit 10 to be turned on when receiving the charging request of the air power supply module, and controlling the battery of the land power supply module 20 to be powered down under high voltage; when identifying that the positive signal of the low-voltage auxiliary power supply of the charging pile is valid, the land power supply module 20 performs charging handshake with the charging pile, requests the charging pile to output corresponding charging voltage according to the charging parameter of the air power supply module, and outputs the charging voltage to the air power supply module through the high voltage connector 30.

[0037] It can be understood that in the existing land-air separated type flying car, when realizing the fast charging function, the aircraft has to increase fast charging relays, fast charging wire harnesses, fast charging interfaces and the like, which greatly increases the use cost and the overall weight of the aircraft. In order to realize the fast charging function and lightweight design of the aircraft in the land-air separated type flying car, the application combines the configuration characteristics of the land-air separated type flying car, designs fast charging relays and fast charging interfaces on the vehicle side, and the aircraft shares fast charging interfaces, fast charging relays and communication interfaces with the vehicle side. When the land-air separated type flying car is fast charging, the fast charging circuit of the vehicle side is connected with the high voltage circuit of the aircraft, the aircraft and the vehicle side perform CAN communication interaction, and the vehicle side forwards the charging demand of the aircraft to the charging pile through the direct current CAN communication protocol, thereby ensuring the charging demand of the aircraft. The application can not only meet the fast charging demand of the vehicle side, but also meet the fast charging demand of the aircraft, and can automatically switch to the vehicle fast charging after the aircraft completes charging, so as to realize the fast charging function of the land-air separated type flying car with low cost and lightweight design target.

[0038] It should be noted that the direct current charging high voltage circuit includes the high voltage connector 30, the fast charging switch circuit 10 and the land power supply module 20, the land power supply module 20 is connected with the air power supply module through the high voltage connector 30. The air power supply module is used for supplying power to the aircraft; the land power supply module 20 is used for supplying power to the land vehicle, and is also used for receiving the charging request, the charging end request and the charging parameter sent by the air power supply module through the CAN communication protocol, and is also used for transmitting the charging request, the charging end request and the charging parameter sent by the air power supply module to the charging pile through the direct current CAN communication protocol, or is used for the land power supply module 20 sending its own charging parameter to the charging pile through the direct current CAN communication protocol; the high voltage connector 30 is used for connecting the high voltage loop of the air power supply module and the fast charging loop of the land power supply module 20.

[0039] In the embodiment, referring to Figure 2 , a single fast charging switch circuit 10 is used to realize fast charging connection, so that the fast charging switch circuit 10 is connected in series between the first end of the charging pile and the first input end of the split switch circuit, and the second end of the charging pile is directly connected with the split switch circuit. In actual application, when the aircraft in the flying vehicle is charged, the air power supply module sends a charging request to the land power supply module 20 through the CAN communication protocol, the land power supply module 20 receives the charging request of the air power supply module, controls the split switch circuit and the fast charging switch circuit 10 to be turned on, and the battery of the land power supply module 20 is powered off under high voltage, so as to avoid that the battery of the land vehicle interferes with the charging of the battery of the aircraft. It should be understood that the positive signal of the low-voltage auxiliary power supply of the charging pile represents the communication connection between the charging pile and the flying vehicle, and the land power supply module 20 identifies that the communication connection between the charging pile and the flying vehicle is normal when the positive signal of the low-voltage auxiliary power supply of the charging pile is effective, and performs charging handshake with the charging pile. The handshake between the flying vehicle and the charging pile refers to the process of communication and negotiation of charging parameters between the flying vehicle and the charging pile during charging, and in the charging handshake stage, the charging pile sends a charging handshake message to the land power supply module 20 to establish a communication relationship with the land power supply module 20. After the charging pile and the land power supply module 20 establish the communication relationship, the insulation detection state is turned on and the CRM=0x00 message is sent to the land power supply module 20, so that the land power supply module 20 closes the insulation detection state, and controls the air power supply module to enter the closed insulation detection state. When the air power supply module completes the insulation detection, the land power supply module 20 requests the charging pile to output the corresponding charging voltage according to the charging parameter of the air power supply module, and outputs the charging voltage to the air power supply module through the high voltage connector 30.

[0040] The application provides a DC charging high-voltage circuit for a land vehicle of a flying vehicle, the flying vehicle comprising the land vehicle and the flying vehicle, and the DC charging high-voltage circuit comprising: a high-voltage connector, a fast charging switch circuit and a land power supply module, the land power supply module having a split switch circuit for controlling the high-voltage connector to be connected or disconnected with the fast charging switch circuit; the land power supply module is electrically connected with the high-voltage connector, and the high-voltage connector is used for plugging with an air power supply module; an input end of the fast charging switch circuit is connected with a first end of a charging pile, an output end of the fast charging switch circuit is connected with a first input end of the split switch circuit, and a second input end of the split switch circuit is connected with a second end of the charging pile; the land power supply module is used for, when receiving a charging request of the air power supply module, controlling the split switch circuit and the fast charging switch circuit to be turned on, and performing high-voltage power-off on a battery of the land power supply module; when identifying that a positive signal of a low-voltage auxiliary power supply of the charging pile is valid, performing a charging handshake with the charging pile, and requesting the charging pile to output a corresponding charging voltage according to a charging parameter of the air power supply module, and outputting the charging voltage to the air power supply module through the high-voltage connector. The application can realize the fast charging function of the flying vehicle in the land-air split flying vehicle with the design goals of low cost and light weight.

[0041] In an embodiment, with reference to Figure 2 , the land power supply module is further used for, when receiving an insulation detection signal of the charging pile, entering a closed insulation detection state, and controlling the air power supply module to enter the closed insulation detection state, and controlling the fast charging switch circuit and the split switch circuit to be closed; when receiving an insulation detection completion signal of the charging pile, performing high-voltage power-off on the battery of the air power supply module; controlling the fast charging switch circuit and the split switch circuit to be turned on, and pre-charging the air power supply module; when the air power supply module completes the pre-charging, controlling the air power supply module to enter an open insulation detection state; when the air power supply module completes the insulation detection, performing the method steps of requesting the charging pile to output a corresponding charging voltage according to the charging parameter of the air power supply module, and outputting the charging voltage to the air power supply module through the high-voltage connector.

[0042] It can be understood that the land-air split type flying car is composed of two parts of an aircraft and a car, and the land-air split type flying car can run as two independent parts or in combination. Among them, the aircraft needs to be designed to be lightweight, and the power of the battery inside the aircraft cannot be set too high, so there are many scenes that need to be quickly charged, and the fast charging function is particularly important. However, the aircraft of the land-air split type flying car generally has 4 or more than 4 rotors, and is correspondingly configured with 4 or more than 4 motor drives, so the Y capacitor of the aircraft will increase with the increase of the number of motors, and the increase of the Y capacitor will affect the insulation function detection time and precision. When the land-air split type flying car is directly charged, the direct charging pile will perform insulation detection. In the process of insulation detection, the Y capacitor of the whole vehicle needs to be charged until the Y capacitor of the whole vehicle is fully charged, the sampling voltage on the insulation resistance tends to be in a stable state, and the flying car can perform charging operation. However, the Y capacitor exists in multiple loads in the flying car, and the connection of multiple Y capacitors causes the sampling voltage on the insulation resistance to be stable for a long time. Since the charging pile has a limited charging time, in the case that the sampling voltage is stable for too long, the charging pile will issue a fault warning, so that the flying car cannot be adapted to the charging pile, seriously affecting the user experience, and the flying car cannot be compatible with the charging pile, and cannot realize charging.

[0043] In the embodiment, the split switch circuit is used as an isolation component to isolate the high-voltage connection between the aircraft and the land vehicle, the fast-charging switch circuit 10 is used as a fast-charging component to realize the direct-current fast-charging function, and the control logic of the flying vehicle is optimized to reduce the probability of fast-charging insulation failure of the flying vehicle and improve the fast-charging experience. In actual application, before the aircraft in the flying vehicle is charged, the charging pile enters an open insulation detection state and sends an insulation detection signal to the land power supply module 20. In the embodiment, the insulation detection signal specifically refers to a CRM=0x00 message. When the land power supply module 20 receives the CRM=0x00 message of the charging pile, it enters a closed insulation detection state and controls the air power supply module to enter a closed insulation detection state, so that the land vehicle and the aircraft enter a closed insulation detection state when the charging pile performs insulation detection. At this time, the land vehicle and the aircraft will not perform insulation detection, thereby avoiding interference with the charging pile during insulation detection. At the same time, the land power supply module 20 controls the fast-charging switch circuit 10 and the split switch circuit to be closed, so as to disconnect the connection path between the aircraft and the charging pile through the fast-charging switch circuit 10 and the split switch circuit, thereby isolating the Y capacitor of the aircraft from the charging pile. At this time, the Y capacitor of the aircraft is not connected to the charging pile, and will not affect the insulation function detection time and accuracy of the charging pile. When the charging pile completes insulation detection, the charging pile sends an insulation detection completion signal to the land power supply module 20 to indicate that the charging pile has completed insulation detection of the flying vehicle and is ready for normal charging. When the land power supply module 20 receives the insulation detection completion signal, it starts to control the battery of the air power supply module to be pre-charged. Before pre-charging the battery of the air power supply module, the battery of the air power supply module is re-powered. Specifically, the land power supply module 20 powers down the battery of the air power supply module and controls the fast-charging switch circuit 10 and the split switch circuit to be opened. At this time, the flying vehicle is connected to the charging pile through the fast-charging switch circuit 10 and the split switch circuit, and the land power supply module 20 controls the charging module to pre-charge the air power supply module. The charging module is a direct-current converter. When the air power supply module completes pre-charging, the land power supply module 20 controls the air power supply module to enter an open insulation detection state. Since the air power supply module starts insulation detection when the charging pile has completed insulation detection, the aircraft and the charging pile will not cause interference. When the air power supply module completes insulation, the air power supply module interacts with the land power supply module 20 according to the “GB / T 27930-2015 Communication Protocol Between Non-vehicle Conductive Charger and Battery Management System of Electric Land Vehicle”. The land power supply module 20 receives the charging parameters sent by the air power supply module and forwards the charging parameters of the air power supply module to the charging pile in real time, so as to request the charging pile to output the corresponding charging voltage according to the charging parameters of the air power supply module. The charging parameters include the required current, the required voltage, and the protection parameters.At this time, the charging voltage output by the charging pile is output to the battery of the air power supply module after passing through the fast charging switch circuit 10, the split switch circuit and the high-voltage connector 30, so as to charge the battery of the air power supply module. In this embodiment, the timing of opening and closing of the fast charging switch circuit 10 and the split switch circuit is controlled, so as to disconnect the connection path between the aircraft and the charging pile through the fast charging switch circuit 10 and the split switch circuit, thereby isolating the Y capacitor of the aircraft from the charging pile. When the charging pile performs insulation detection, the Y capacitor of the aircraft is prevented from being connected to the charging pile, the probability of fast charging insulation failure of the flying car is reduced, and the fast charging function of the aircraft is realized.

[0044] In an embodiment, with reference to Figure 1 , the land power supply module 20 is further configured to, when receiving the charging end request of the air power supply module and when the land power supply module 20 meets the charging condition, perform high-voltage power-off on the battery of the air power supply module and control the split switch circuit to be closed; pre-charge the land power supply module 20, when the land power supply module 20 completes the pre-charge, perform high-voltage power-on on the battery of the land power supply module 20, request the charging pile to output a corresponding charging voltage according to the charging parameter of the land power supply module 20, and output the charging voltage to the battery of the land power supply module 20;

[0045] And / or, the land power supply module 20 is further configured to, when receiving the charging end request of the air power supply module and when the land power supply module 20 does not meet the charging condition, control the fast charging switch circuit 10 to be closed.

[0046] It can be understood that in the embodiment, when the aerial power supply module ends charging or completes charging, the aerial power supply module sends a charging end request to the land power supply module 20 through the CAN communication protocol. When the land power supply module 20 receives the charging end request, it detects whether the remaining power of the battery is less than or equal to the preset power to determine whether the battery meets the charging condition, so as to decide whether to charge according to whether the charging condition is met. It needs to be understood that the land power supply module 20 detects that the remaining power is less than or equal to 90% of the total power of the land power supply module 20, and determines that the land power supply module 20 meets the charging condition. The land power supply module 20 sends the charging parameters of the aerial power supply module to the charging pile through the direct current CAN communication protocol, and the charging parameters specifically include: the current voltage of the aerial vehicle + 5V, and the required current is 0A, so that the charging pile stops supplying power to the aerial power supply module, and controls the battery of the aerial power supply module to be powered off under high voltage, so as to avoid that when the land vehicle is charging, the battery of the aerial vehicle will cause interference. At the same time, the land power supply module 20 controls the split switch circuit to be closed, at this time the charging pile cannot form an electrical connection relationship with the aerial power supply module through the split switch circuit, and the charging pile can still form an electrical connection relationship with the land power supply module 20 through the fast charging switch circuit 10. When the battery of the aerial power supply module is powered off under high voltage, the land power supply module 20 pre-charges the battery through the direct current converter. When the battery is pre-charged, the land power supply module 20 powers on the battery under high voltage, and sends the charging parameters of the battery to the charging pile through the direct current CAN communication protocol, and the charging parameters specifically include: the charging voltage is the current voltage of the land vehicle + 5V, and the required current is the allowable current value of the land vehicle charging. The charging voltage output by the charging pile is output to the land power supply module 20 after passing through the fast charging switch circuit 10, so as to charge the battery of the land power supply module 20. The embodiment can not only meet the fast charging demand of the land vehicle, but also meet the fast charging demand of the aerial vehicle, and can automatically switch to the fast charging of the land vehicle after the aerial vehicle completes charging, so as to realize the fast charging function of the flying vehicle with the design goals of low cost and light weight.

[0047] In addition, when the land power supply module 20 receives the charging end request of the aerial power supply module, it detects whether the remaining power of the battery is less than or equal to the preset power. When the remaining power is greater than 90% of the total power of the land power supply module 20, it is determined that the land power supply module 20 does not meet the charging condition, and the remaining power is sufficient, so the charging pile does not need to charge the land power supply module 20, and the charging can be directly ended. Therefore, the land power supply module 20 controls the fast charging switch circuit 10 to be closed, so as to disconnect the connection path between the aerial vehicle in the flying vehicle and the charging pile, and disconnect the connection path between the land vehicle and the charging pile, and neither the aerial vehicle nor the land vehicle is charged.

[0048] In an embodiment, referring to Figure 2, the land power supply module 20 includes a first control circuit and an automobile battery pack, and the air power supply module includes a second control circuit and an air battery pack;

[0049] The first control circuit is connected with the second control circuit, the charging pile, the fast charging switch circuit 10 and the split switch circuit respectively, the high-voltage connector 30 is connected with the automobile battery pack and the split switch circuit respectively, and the air battery pack is connected with the split switch circuit.

[0050] The first control circuit is configured to, when receiving a charging request of the second control circuit, perform high-voltage power-off on the automobile battery pack, and when identifying that a positive signal of a low-voltage auxiliary power supply of the charging pile is valid, send a charging parameter requirement of the air power supply module to the charging pile.

[0051] When receiving an insulation detection signal of the charging pile, the first control circuit controls the second control circuit to enter an insulation detection closing state, and controls the fast charging switch circuit 10 and the split switch circuit to be closed; when receiving an insulation detection completion signal of the charging pile, the first control circuit controls the second control circuit to perform high-voltage power-off on the air battery pack; controls the fast charging switch circuit 10 and the split switch circuit to be opened, and controls the second control circuit to pre-charge the air battery pack; when the air battery pack completes pre-charging, the first control circuit controls the second control circuit to enter an insulation detection opening state; and when the second control circuit completes insulation detection, the first control circuit controls the charging pile to output a corresponding charging voltage according to a charging parameter request of the air battery pack, and outputs the charging voltage to the air battery pack through the high-voltage connector 30.

[0052] When receiving a charging end request of the second control circuit, and when the automobile battery pack meets a charging condition, the first control circuit controls the second control circuit to perform high-voltage power-off on the air battery pack, and controls the split switch circuit to be closed; pre-charges the automobile battery pack, and when the automobile battery pack completes pre-charging, performs high-voltage power-on on the automobile battery pack, and controls the charging pile to output a corresponding charging voltage according to a charging parameter request of the automobile battery pack, and outputs the charging voltage to the automobile battery pack.

[0053] It can be understood that the land power supply module 20 includes a first control circuit and an automobile battery pack, and the air power supply module includes a second control circuit and an air battery pack. The first control circuit is configured to communicate with the second control circuit through a CAN communication protocol, so as to control the air battery pack through the second control circuit; and the first control circuit and the charging pile are configured to realize communication interaction through a direct-current CAN communication protocol. The first control circuit and the second control circuit in the embodiment are both implemented by a battery management system (BMS).

[0054] In practical application, before the aircraft in the air vehicle is charged, the charging pile enters an open insulation detection state and sends an insulation detection signal to the first control circuit. The first control circuit enters a closed insulation detection state, and controls the second control circuit to enter a closed insulation detection state, so that the land vehicle and the aircraft enter the closed insulation detection state when the charging pile is performing insulation detection, and at this time, the land vehicle and the aircraft will not perform insulation detection, avoiding interference with the charging pile. At the same time, the first control circuit controls the fast charging switch circuit 10 and the split switch circuit to be closed, so as to disconnect the connection path between the aircraft and the charging pile through the fast charging switch circuit 10 and the split switch circuit, thereby isolating the Y capacitor of the aircraft from the charging pile, and avoiding affecting the insulation function detection time and accuracy of the charging pile. When the charging pile completes the insulation detection, the charging pile sends an insulation detection completion signal to the first control circuit of the land vehicle, so as to mark that the charging pile has completed the insulation detection of the air vehicle, and the charging pile is ready for the normal charging process.

[0055] When the first control circuit receives the insulation detection completion signal, the second control circuit controls the air battery pack to be pre-charged, and controls the air battery pack to be re-powered at high voltage before pre-charging the air battery pack. Specifically, the second control circuit powers down the air battery pack at high voltage, and controls the fast charging switch circuit 10 and the split switch circuit to be opened, at this time, the land vehicle is connected with the charging pile through the fast charging switch circuit 10 and the split switch circuit, and the second control circuit controls the DC converter to pre-charge the air battery pack. When the pre-charging of the air battery pack is completed, the first control circuit controls the second control circuit to enter an open insulation detection state. Since the insulation detection of the DC charging high-voltage circuit is responsible by the air vehicle at this time, the charging pile has completed the insulation detection when the second control circuit performs insulation detection, and the second control circuit and the charging pile will not interfere with each other. When the second control circuit completes the insulation, the second control circuit interacts with the first control circuit according to the "GB / T 27930-2015 Communication Protocol Between Non-vehicle Conductive Charger and Battery Management System of Electric Land Vehicle", the first control circuit receives the charging parameters sent by the second control circuit, and transmits the charging parameters of the second control circuit to the charging pile in real time, so as to request the charging pile to output the corresponding charging voltage according to the charging parameters of the second control circuit. The charging parameters include demand current, demand voltage, and protection parameters. At this time, the charging voltage output by the charging pile is output to the air battery pack through the fast charging switch circuit 10, the split switch circuit and the high-voltage plug-in piece 30, so as to charge the air battery pack.

[0056] In an embodiment, referring to Figure 2 , the fast charging switch circuit 10 comprises:

[0057] The fast charging relay has an input end connected with the first end of the charging pile, and an output end connected with the first input end of the split switch circuit.

[0058] The fast charging interface has a first end connected with the first end of the charging pile, a second end connected with the second end of the charging pile, a third end connected with the input end of the fast charging relay, and a fourth end connected with the second input end of the split switch circuit.

[0059] The first control circuit is configured to control the fast charging relay to be closed when receiving the insulation detection signal of the charging pile, and control the fast charging relay to be opened when the aerial battery pack is powered off.

[0060] It can be understood that, in the embodiment, the fast charging switch circuit 10 is composed of the fast charging relay and the fast charging interface, and the fast charging relay is the seventh relay K7 in Figure 2 The seventh relay K7 is connected with the first control circuit, the input end of the seventh relay K7 is connected with the first end of the charging pile, and the output end of the seventh relay K7 is connected with the split switch circuit; the first end of the charging pile is connected with the split switch circuit through a connecting line.

[0061] In actual application, when receiving the insulation detection signal of the charging pile, the first control circuit enters the insulation detection closing state, and controls the second control circuit to enter the insulation detection closing state. At the same time, the seventh relay K7 and the split switch circuit are controlled to be closed. In this way, the connecting path between the aerial vehicle and the charging pile is disconnected through the seventh relay K7 and the split switch circuit, so that the Y capacitor of the aerial vehicle is isolated from the charging pile, and the Y capacitor of the aerial vehicle cannot form a loop with the charging pile through the seventh relay K7. When the insulation detection of the charging pile is completed, the first control circuit controls the second control circuit to power off the aerial battery pack, and controls the seventh relay K7 and the split switch circuit to be opened. At this time, the aerial power supply module can form a loop with the charging pile through the seventh relay K7 and the split switch circuit, and the charging voltage of the charging pile can be output to the aerial power supply module through the seventh relay K7 and the split switch circuit.

[0062] In an embodiment, referring to Figure 2 , the aerial power supply module further comprises:

[0063] The first DC converter has a first end connected with the positive electrode of the aerial battery pack, and a second end connected with the negative electrode of the aerial battery pack.

[0064] The second control circuit is configured to control the first DC converter to output a DC voltage to the airborne battery pack to pre-charge the airborne battery pack.

[0065] The airborne power supply module further comprises:

[0066] The first switch circuit is connected in series between the high-voltage connector and the positive electrode of the airborne battery pack.

[0067] The second switch circuit is connected in series between the high-voltage connector and the negative electrode of the airborne battery pack.

[0068] The second control circuit is configured to control the first switch circuit and the second switch circuit to be disconnected when the airborne battery pack is powered off, and to control the first switch circuit and the second switch circuit to be connected when the airborne battery pack is powered on.

[0069] It can be understood that in the embodiment, the first DC converter is implemented by a first DC-DC converter, which is configured to output a DC voltage to the high-voltage loop in the airborne power supply module to pre-charge the airborne battery pack in the airborne power supply module, thereby replacing the existing pre-charge relay to realize the pre-charge function. The first switch circuit is implemented by a first relay K1; the second switch circuit is implemented by a second relay K2; and the split switch circuit is implemented by a fifth relay K5 and a sixth relay K6, respectively.

[0070] In actual application, when the first control circuit turns off the insulation detection function and controls the second circuit to turn off the insulation detection function, the seventh relay K7, the fifth relay K5 and the sixth relay K6 are kept in a disconnected state. When the charging pile completes the insulation detection, the airborne power supply module needs to be powered off at high voltage first, and then the first relay K1 and the second relay K2 are disconnected in sequence. Specifically, the first relay K1 is disconnected first to avoid the failure of the first relay K1 and the second relay K2 when they are closed at the same time. Within 100 ms, when the voltage difference between the front-end voltage UAA1 of the first relay K1 and the back-end voltage UBB1 of the first relay K1 is greater than 30V, i.e., |UAA1-UBB1|>30V, it is determined that the first relay K1 is successfully disconnected, and then the second relay K2 is disconnected. Otherwise, the first relay K1 is reported to be faulty, and the first control circuit ends the charging.

[0071] When the first relay K1 and the second relay K2 are both disconnected, the high voltage of the aerial power supply module is powered off, the fifth relay K5, the sixth relay K6 and the seventh relay K7 are closed in turn, after the fifth relay K5, the sixth relay K6 and the seventh relay K7 are completely closed, the second relay K2 is closed first, and the first DC-DC converter is started to pre-charge. The DC voltage output by the first DC-DC converter is output to the high voltage loop of the aerial battery pack through the second relay K2. Within 700 ms, when the back-end voltage UBB1 of the first relay K1 is greater than 98% of the front-end voltage UAA1 of the first relay K1, that is, UBB1 > 98% * UAA1, it is determined that the pre-charging of the first relay K1 is successful. The first control circuit controls the first relay K1 to be closed, and the high voltage of the aerial power supply module is powered on. At this time, the charging pile can output charging voltage to the aerial battery pack through the seventh relay K7, the fifth relay K5, the sixth relay K6, the first relay K1 and the second relay K2. After the high voltage of the aerial power supply module is powered on, the first control circuit sends the second control circuit a BRO=0xAA message, and controls the second control circuit to enter an insulation detection state. At this time, only the aerial battery pack is performing insulation detection, and the aerial battery pack itself will not be affected by the Y capacitor.

[0072] In another embodiment, within 700 ms, when the back-end voltage UBB1 of the first relay K1 is less than 98% of the front-end voltage UAA1 of the first relay K1, that is, UBB1 ≤ 98% * UAA1, it is determined that the pre-charging of the first relay K1 fails, and the first control circuit ends the charging.

[0073] In an embodiment, with reference to Figure 3 , the aerial power supply module further comprises:

[0074] A first pre-charging relay, a first end of the first pre-charging relay is connected to the positive electrode of the aerial battery pack, and a second end of the second pre-charging relay is connected to the high voltage connector;

[0075] The second control circuit is configured to control the first pre-charging relay to be closed, so as to control the aerial battery pack to pre-charge the high voltage loop of the aerial power supply module.

[0076] It can be understood that in the embodiment, the pre-charging function of the aerial battery pack in the aerial power supply module is realized by the first pre-charging relay. With reference to Figure 3, the first pre-charging relay is specifically implemented by the eighth relay K8. In actual application, in the process of charging the aircraft, the fifth relay K5, the sixth relay K6 and the seventh relay K7 need to be closed in sequence, and after the fifth relay K5, the sixth relay K6 and the seventh relay K7 are closed, the second relay K2 is closed first, and then the eighth relay K8 is closed. At this time, the eighth relay K8 conducts the path between the positive electrode of the airborne battery pack and the high-voltage plug-in part, so as to output the direct-current voltage of the airborne battery pack, so as to pre-charge the high-voltage loop of the airborne power supply module. Within 700ms, when the back-end voltage UBB1 of the first relay K1 > 98% of the front-end voltage UAA1 of the first relay K1, that is, UBB1 > 98% of UAA1, it is determined that the pre-charging of the first relay K1 is successful. The first control circuit controls the closing of the first relay K1 to complete the high-voltage power-on of the airborne power supply module.

[0077] In an embodiment, referring to Figure 2 , the land power supply module 20 further comprises:

[0078] a second direct-current converter, a first end of the second direct-current converter being connected with the positive electrode of the automobile battery pack, and a second end of the second direct-current converter being connected with the negative electrode of the automobile battery pack;

[0079] The first control circuit is configured to control the second direct-current converter to output a direct-current voltage to the automobile battery pack, so as to pre-charge the automobile battery pack.

[0080] The land power supply module 20 further comprises:

[0081] a third switch circuit, the third switch circuit being connected in series between the high-voltage plug-in part and the positive electrode of the automobile battery pack;

[0082] a fourth switch circuit, the fourth switch circuit being connected in series between the high-voltage plug-in part and the negative electrode of the automobile battery pack;

[0083] The first control circuit is configured to control the third switch circuit and the fourth switch circuit to be disconnected when the automobile battery pack is powered off, and to control the third switch circuit and the fourth switch circuit to be conducted when the automobile battery pack is powered on.

[0084] It can be understood that in the embodiment, the second direct-current converter is implemented by a second DC-DC converter, which is configured to output a direct-current voltage to the high-voltage loop in the land power supply module 20, so as to pre-charge the automobile battery pack in the land power supply module 20, thereby replacing the existing pre-charging relay to realize the pre-charging function.

[0085] In actual application, when the land power supply module 20 receives the charging end request and the automobile battery pack meets the charging condition, the first control circuit sends the charging pile parameters that the charging voltage is the current voltage of the aircraft + 5V and the required current is 0A. In order to avoid damage to the relay, the first relay K1 should be disconnected first, and then the second relay K2 is disconnected. Within 500ms, when the voltage difference between the front end voltage UAA1 of the first relay K1 and the back end voltage UBB1 of the first relay K1 is >100V, UAA1-UBB1>100V, it is determined that the first relay K1 is successfully disconnected, and then the fifth relay K5 and the sixth relay K6 are disconnected. When the voltage difference between the front end voltage UAA1 of the first relay K1 and the back end voltage UBB1 of the first relay K1 is ≤100V, the first control circuit reports that the first relay K1 is stuck and ends the charging.

[0086] After the fifth relay K5 and the sixth relay K6 are disconnected, the first control circuit sends the charging pile parameters that the charging voltage is the current voltage of the land automobile + 5V and the required current is 0A, closes the fourth relay K4 first, and turns on the second DC-DC converter to output a direct current voltage to the high-voltage loop in the land power supply module 20 to pre-charge the automobile battery pack. Within 700ms, when the back end voltage UCC1 of the third relay K3 is >98%*the front end voltage UDD1 of the third relay K3, i.e. UCC1>98%*UDD1, it is determined that the third relay K3 is successfully pre-charged, and the third relay K3 is controlled to be closed. When the third relay K3 and the fourth relay K4 are both disconnected, the high-voltage power supply of the land automobile battery is completed. At this time, the charging pile can output the charging voltage to the automobile battery pack through the seventh relay K7, the fifth relay K5, the sixth relay K6, the third relay K3 and the fourth relay K4.

[0087] In another embodiment, within 700ms, when the back end voltage UCC1 of the third relay K3 is ≤98%*the front end voltage UDD1 of the third relay K3, i.e. UCC1≤98%*UDD1, it is determined that the third relay K3 fails to pre-charge, and the first control circuit ends the charging.

[0088] In an embodiment, referring to Figure 3 , the land power supply module further comprises:

[0089] a second pre-charging relay, a first end of the second pre-charging relay is connected with the high-voltage connector, and a second end of the second pre-charging relay is connected with the positive electrode of the automobile battery pack;

[0090] the first control circuit is configured to control the second pre-charging relay to be closed to control the automobile battery pack to pre-charge the high-voltage loop of the land power supply module.

[0091] It can be understood that in the embodiment, the pre-charging function of the automobile battery group in the land power supply module 20 is realized by the second pre-charging relay. Referring to Figure 3 , the second pre-charging relay is specifically realized by the ninth relay K9. In actual application, when the land power supply module 20 receives a charging end request and the automobile battery group meets the charging condition, the land automobile can be charged. After the first control circuit controls the fifth relay K5 and the sixth relay K6 to be disconnected, the first control circuit sends a charging voltage of the current voltage of the land automobile + 5V and a demand current of 0A to the charging pile, and then closes the fourth relay K4 and the ninth relay K9. At this time, the ninth relay K9 turns on the path between the positive electrode of the automobile battery group and the high-voltage plug-in part, so that the automobile battery group outputs a direct-current voltage to pre-charge the high-voltage loop of the land power supply module 20. When the back-end voltage UCC1 of the third relay K3 > 98%*the front-end voltage UDD1 of the third relay K3, that is, UCC1 > 98%*UDD1, within 700ms, it is determined that the third relay K3 is pre-charged successfully, and then the third relay K3 is controlled to be closed. When the third relay K3 and the fourth relay K4 are both disconnected, the high-voltage power-on of the land automobile power battery is completed.

[0092] In an embodiment, referring to Figure 1 and 2 , the first control circuit is further configured to detect the front-end voltage and the back-end voltage of the first switching circuit through the second control circuit, and determine that the first switching circuit is disconnected successfully when the difference between the front-end voltage and the back-end voltage is greater than a first preset voltage.

[0093] It can be understood that by detecting the relationship between the front-end voltage and the back-end voltage of the first relay K1, it can be determined whether the first relay K1 meets the pre-charging condition, and the first relay K1 is further controlled to be closed when it is determined that the first relay K1 meets the pre-charging condition. In the embodiment, the first control circuit first closes the second relay K2, the front-end voltage of the first relay K1 is the voltage of the positive electrode of the first relay K1 close to the air battery group, and the back-end voltage of the first relay K1 is the voltage of the first relay K1 close to the first direct-current converter. The front-end voltage of the first relay K1 is defined as UAA1, and the back-end voltage of the first relay K1 is defined as UBB1. When UBB1 > 98%*UAA1 within 700ms, it is determined that the first relay K1 meets the pre-charging condition, that is, the first relay K1 is controlled to be closed, so that the first relay K1 and the second relay K2 are in a closed state, thereby completing the high-voltage power-on of the air battery group. When UBB1 ≤ 98%*UAA1 within 700ms, it is determined that the first relay K1 does not meet the pre-charging condition, and the first control circuit ends the charging.

[0094] In an embodiment, referring to Figure 1and 2 The first control circuit is further configured to detect a front-end voltage and a back-end voltage of the three-switch circuit, and determine that the three-switch circuit is successfully disconnected when a difference between the front-end voltage and the back-end voltage is greater than a second preset voltage.

[0095] It can be understood that, by detecting a relationship between the front-end voltage and the back-end voltage of the third relay K3, it can be determined whether the third relay K3 meets the pre-charging condition, and the third relay K3 is further controlled to be closed when it is determined that the third relay K3 meets the pre-charging condition. In the embodiment, the first control circuit first closes the fourth relay K4, the front-end voltage of the third relay K3 is a voltage on a positive pole side of the automobile battery pack close to the third relay K3, and the back-end voltage of the third relay K3 is a voltage on a side of the second DC converter close to the third relay K3. The front-end voltage of the third relay K3 is defined as UDD1, the back-end voltage of the third relay K3 is defined as UCC1, and when UCC1 > 98%*UDD1 within 700 ms, it is determined that the third relay K3 meets the pre-charging condition, that is, the third relay K3 is controlled to be closed, so that the third relay K3 and the fourth relay K4 are in a closed state, thereby completing high-voltage power-on of the automobile battery pack. When UCC1 ≤ 98%*UDD1 within 700 ms, it is determined that the third relay K3 does not meet the pre-charging condition, and the first control circuit ends charging.

[0096] In an embodiment, referring to Figure 1 and 2 The land power supply module 20 is further configured to detect a temperature of the charging pile, limit a charging current of the charging pile when the temperature exceeds a first preset temperature, and control the seventh relay K7 to be disconnected when the temperature exceeds a second preset temperature.

[0097] It can be understood that, in the embodiment, the first preset temperature is set as T1, and the second preset temperature is set as T2, the second preset temperature is a maximum temperature limit, and T2 is greater than T1.

[0098] In practical applications, when the flying car enters the charging state to charge the land power supply module 20 or the air charging module, the land power supply module 20 collects the temperature of the charging pile in real time. When the temperature of the charging pile exceeds the first preset temperature T1, the demand current of the land power supply module 20 or the air charging module is limited, thereby limiting the charging current output from the charging pile to the land power supply module 20 or the air charging module. For example, the demand current is set to demand current*n, where n is a coefficient, and preferably n is set to 50%, so that when the temperature of the charging pile exceeds the first preset temperature T1, the demand current is demand current*50%; when the temperature of the charging pile exceeds the second preset temperature T2, the land power supply module 20 actively ends the charging to control the seventh relay K7 to be disconnected, thereby disconnecting the path between the charging pile and the land power supply module 20.

[0099] It should be noted that, with reference to Figure 1 and 2 When the aircraft needs to be charged, the fifth relay K5, the sixth relay K6 and the seventh relay K7 are kept in the open state, and the first relay K1, the second relay K2, the third relay K3 and the fourth relay K4 are kept in the closed state, i.e. in the high voltage state. The air power supply module is connected to the land power supply module 20 through the high voltage connector 30, and the second control circuit sends the charging request of the air battery pack to the first control circuit if the air battery pack has no disallowed charging fault. The user connects the charging gun to the DC charging port of the car, and the first control circuit disconnects the third relay K3 and the fourth relay K4 when it identifies that the charging mode sent by the second control circuit is DC charging. Specifically, the first control circuit first disconnects the third relay K3, and within 200ms, detects that the voltage difference between the rear-end voltage UCC1 of the third relay K3 and the front-end voltage UDD1 of the third relay K3 is > 30V, i.e. |UCC1 - UDD1| > 30V, and determines that the third relay K3 is successfully disconnected, and then disconnects the fourth relay K4. Otherwise, report a third relay K3 fault, and the first control circuit ends the charging. After the first control circuit identifies that the charging pile A+ is valid and sends an A+ signal, it confirms that the communication connection between the charging pile and the flying car is normal, and performs a charging handshake with the charging pile. The second control circuit sends the charging parameter information to the first control circuit in real time, and the first control circuit forwards the charging parameter information of the second control circuit to the charging pile in real time through the DC CAN.

[0100] The application further provides a direct-current charging high-voltage circuit control method, which is used for a land vehicle of a flying vehicle, the flying vehicle comprising the land vehicle and the flying vehicle, the direct-current charging high-voltage circuit comprising a high-voltage connector, a fast charging switch circuit and a land power supply module, the land power supply module having a split switch circuit for controlling connection or disconnection of the high-voltage connector and the fast charging switch circuit, the land power supply module being electrically connected with the high-voltage connector, the high-voltage connector being used for plugging with an air power supply module, an input end of the fast charging switch circuit being connected with a first end of the charging pile, an output end of the fast charging switch circuit being connected with a first input end of the split switch circuit, and a second input end of the split switch circuit being connected with a second end of the charging pile.

[0101] The method comprises:

[0102] When receiving a charging request of the air power supply module, the split switch circuit and the fast charging switch circuit are controlled to be turned on, and a battery of the land power supply module is powered down under high voltage.

[0103] When identifying that a low-voltage auxiliary power supply positive signal of the charging pile is valid, the charging pile is charged with a handshake, the charging pile is requested to output a corresponding charging voltage according to a charging parameter of the air power supply module, and the charging voltage is output to the air power supply module through the high-voltage connector.

[0104] It can be understood that, in order to simultaneously realize the fast charging function and lightweight design of the flying vehicle in the land-air split flying vehicle, the application further provides a direct-current charging high-voltage circuit control method, when the land-air split flying vehicle is fast charged, the fast charging loop at the vehicle end is connected with the high-voltage loop of the flying vehicle, the flying vehicle and the vehicle end are communicated and interacted through CAN, the charging demand of the flying vehicle is forwarded to the charging pile through the direct-current CAN communication protocol by the vehicle end, so as to guarantee the charging demand of the flying vehicle. The application can meet the fast charging demand of the vehicle end, the fast charging demand of the flying vehicle, and automatically switch to the vehicle fast charging after the flying vehicle is charged, and can realize the fast charging function of the land-air split flying vehicle with the design goals of low cost and lightweight.

[0105] The application further provides a land vehicle, which comprises the direct-current charging high-voltage circuit as described above.

[0106] The land vehicle includes a direct-current charging high-voltage circuit, and the direct-current charging high-voltage circuit includes a high-voltage connector 30, a fast charging switch circuit 10, and a land power supply module 20. In actual application, the land power supply module 20 receives a charging voltage of a charging pile through the fast charging switch circuit 10, and transmits the charging voltage to a vehicle battery pack to charge the vehicle battery pack. The high-voltage connector 30 can be connected to other battery-powered equipment, and the land power supply module 20 can transmit the charging voltage received by the fast charging switch circuit 10 to other battery-powered equipment through the high-voltage connector 30 to charge other battery-powered equipment. For example, when the high-voltage connector 30 is connected to an aircraft, the land power supply module 20 can transmit the charging voltage received by the fast charging switch circuit 10 to the aircraft through the high-voltage connector 30 to charge the aircraft, so that the aircraft has a fast charging function.

[0107] The application further provides a land-air split type flying vehicle, which comprises the land vehicle described in the above content. The land-air split type flying vehicle comprises the land vehicle and an aircraft, and the specific circuit structure of the land-air split type flying vehicle refers to the above-described embodiments. The land-air split type flying vehicle can realize the fast charging function of the aircraft with the design goals of low cost and light weight, and can improve the compatibility of the flying vehicle with the charging pile, reduce the probability of fast charging insulation failure of the flying vehicle, and improve the fast charging experience by optimizing the control logic of the flying vehicle. Since the land-air split type flying vehicle adopts all the technical solutions of the above-described embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-described embodiments, which will not be described here.

[0108] The above-described only is the optional embodiment of the application, and does not limit the patent scope of the application, and any equivalent structural transformation made by using the content of the specification and drawings of the application, or direct / indirect application in other related technical fields is included in the patent protection scope of the application.

Claims

1. A direct current charging high voltage circuit for a land vehicle of an air vehicle, the air vehicle comprising the land vehicle and an aircraft, characterized in that, The direct-current charging high-voltage circuit comprises: The high-voltage connector, the fast charging switch circuit and the land power supply module, the land power supply module has a split switch circuit for controlling the high-voltage connector to be connected or disconnected with the fast charging switch circuit; The land power supply module is electrically connected with the high-voltage connector, and the high-voltage connector is used for plugging with the air power supply module; The input end of the fast charging switch circuit is connected with the first end of the charging pile, the output end of the fast charging switch circuit is connected with the first input end of the split switch circuit, and the second input end of the split switch circuit is connected with the second end of the charging pile; The land power supply module is configured to control the split switch circuit and the fast charging switch circuit to be turned on and the battery of the land power supply module to be powered down under high voltage when receiving a charging request of the air power supply module, perform charging handshake with the charging pile when identifying that a positive signal of a low-voltage auxiliary power supply of the charging pile is valid, request the charging pile to output corresponding charging voltage according to charging parameters of the air power supply module, and output the charging voltage to the air power supply module through the high-voltage connector.

2. The DC charging high voltage circuit of claim 1, wherein, The land power supply module is further configured to enter a closed insulation detection state when receiving an insulation detection signal of the charging pile, control the air power supply module to enter the closed insulation detection state, and control the fast charging switch circuit and the split switch circuit to be turned off, power down the battery of the air power supply module under high voltage when receiving an insulation detection completion signal of the charging pile, control the fast charging switch circuit and the split switch circuit to be turned on, and pre-charge the air power supply module; When the air power supply module completes pre-charging, the air power supply module is controlled to enter an open insulation detection state, and when the air power supply module completes insulation detection, the method steps of requesting the charging pile to output corresponding charging voltage according to charging parameters of the air power supply module and outputting the charging voltage to the air power supply module through the high-voltage connector are performed.

3. The DC charging high voltage circuit of claim 1, wherein, The land power supply module is further configured to power down the battery of the air power supply module under high voltage and control the split switch circuit to be turned off when receiving a charging end request of the air power supply module and when the land power supply module meets a charging condition, pre-charge the land power supply module, power up the battery of the land power supply module under high voltage when the land power supply module completes pre-charging, request the charging pile to output corresponding charging voltage according to charging parameters of the land power supply module, and output the charging voltage to the battery of the land power supply module; And / or, the land power supply module is further configured to control the fast charging switch circuit to be turned off when receiving the charging end request of the air power supply module and when the land power supply module does not meet the charging condition.

4. The DC charging high voltage circuit of claim 1, wherein, The land power supply module comprises a first control circuit and an automobile battery pack, and the air power supply module comprises a second control circuit and an air battery pack. The first control circuit is connected with the second control circuit, the charging pile, the fast charging switch circuit and the split switch circuit respectively, the high-voltage connector is connected with the automobile battery pack and the split switch circuit respectively, and the aerial battery pack is connected with the split switch circuit. The first control circuit is configured to, when receiving a charging request of the second control circuit, perform high-voltage power-off on the automobile battery pack, and when identifying that a positive signal of a low-voltage auxiliary power supply of the charging pile is valid, send a charging parameter requirement of the aerial power supply module to the charging pile. When receiving an insulation detection signal of the charging pile, the first control circuit controls the second control circuit to enter an insulation detection closing state, controls the fast charging switch circuit and the split switch circuit to be closed, and controls the second control circuit to perform high-voltage power-off on the aerial battery pack; when receiving an insulation detection completion signal of the charging pile, the first control circuit controls the second control circuit to perform high-voltage power-off on the aerial battery pack, controls the fast charging switch circuit and the split switch circuit to be opened, and controls the second control circuit to pre-charge the aerial battery pack; when the aerial battery pack completes pre-charging, the first control circuit controls the second control circuit to enter an insulation detection opening state; and when the second control circuit completes insulation detection, the first control circuit controls the charging pile to output a corresponding charging voltage according to a charging parameter request of the aerial battery pack, and controls the charging voltage to be output to the aerial battery pack through the high-voltage connector. When receiving a charging end request of the second control circuit and when the automobile battery pack meets a charging condition, the first control circuit controls the second control circuit to perform high-voltage power-off on the aerial battery pack, controls the split switch circuit to be closed, pre-charges the automobile battery pack, performs high-voltage power-on on the automobile battery pack when the automobile battery pack completes pre-charging, and controls the charging pile to output a corresponding charging voltage according to a charging parameter request of the automobile battery pack, and controls the charging voltage to be output to the automobile battery pack.

5. The DC charging high voltage circuit of claim 4, wherein, The fast charging switch circuit comprises: A fast charging relay, an input end of the fast charging relay is connected with a first end of the charging pile, an output end of the fast charging relay is connected with a first input end of the split switch circuit, and the fast charging relay is connected with the first control circuit; A fast charging interface, a first end of the fast charging interface is connected with the first end of the charging pile, a second end of the fast charging interface is connected with a second end of the charging pile, a third end of the fast charging interface is connected with the input end of the fast charging relay, and a fourth end of the fast charging interface is connected with a second input end of the split switch circuit; The first control circuit is configured to, when receiving an insulation detection signal of the charging pile, control the fast charging relay to be closed, and when the aerial battery pack is powered off, control the fast charging relay to be opened.

6. The DC charging high voltage circuit of claim 4, wherein, The aerial power supply module further comprises: A first direct current converter, a first end of the first direct current converter is connected with a positive pole of the aerial battery pack, and a second end of the first direct current converter is connected with a negative pole of the aerial battery pack; The second control circuit is configured to control the first direct current converter to output a direct current voltage to the aerial battery pack to pre-charge the aerial battery pack.

7. The DC charging high voltage circuit of claim 4, wherein, The aerial power supply module further comprises: A first pre-charging relay, a first end of the first pre-charging relay is connected with a positive pole of the aerial battery pack, and a second end of a second pre-charging relay is connected with the high-voltage connector; The second control circuit is configured to control the first pre-charging relay to be closed, so as to control the aerial battery pack to pre-charge a high-voltage loop of the aerial power supply module.

8. The DC charging high voltage circuit of claim 4, wherein, The aerial power supply module further comprises: A first switch circuit, which is connected in series between the high-voltage connector and the positive pole of the aerial battery pack; A second switch circuit, which is connected in series between the high-voltage connector and a negative pole of the aerial battery pack; The second control circuit is configured to control the first switch circuit and the second switch circuit to be disconnected when the aerial battery pack is powered off, and control the first switch circuit and the second switch circuit to be connected when the aerial battery pack is powered on.

9. The DC charging high voltage circuit of claim 4, wherein, The land power supply module further comprises: A second DC converter, a first end of the second DC converter is connected with a positive pole of the automobile battery pack, and a second end of the second DC converter is connected with a negative pole of the automobile battery pack; The first control circuit is configured to control the second DC converter to output a DC voltage to the automobile battery pack, so as to pre-charge the automobile battery pack.

10. The DC charging high voltage circuit of claim 4, wherein, The land power supply module further comprises: A second pre-charging relay, a first end of the second pre-charging relay is connected with the high-voltage connector, and a second end of the second pre-charging relay is connected with the positive pole of the automobile battery pack; The first control circuit is configured to control the second pre-charging relay to be closed, so as to control the automobile battery pack to pre-charge a high-voltage loop of the land power supply module.

11. The DC charging high voltage circuit of claim 4, wherein, The land power supply module further comprises: A third switch circuit, which is connected in series between the high-voltage connector and the positive pole of the automobile battery pack; A fourth switch circuit, which is connected in series between the high-voltage connector and the negative pole of the automobile battery pack; The first control circuit is configured to control the third switch circuit and the fourth switch circuit to be disconnected when the automobile battery pack is powered off, and control the third switch circuit and the fourth switch circuit to be connected when the automobile battery pack is powered on.

12. The DC charging high voltage circuit of claim 8, wherein, The first control circuit is further configured to detect a front-end voltage and a rear-end voltage of the first switch circuit through the second control circuit, and confirm that the first switch circuit is successfully disconnected when a difference between the front-end voltage and the rear-end voltage is greater than a first preset voltage.

13. The DC charging high voltage circuit of claim 11, wherein, The first control circuit is further configured to detect a front-end voltage and a rear-end voltage of the third switch circuit, and confirm that the third switch circuit is successfully disconnected when a difference between the front-end voltage and the rear-end voltage is greater than a second preset voltage.

14. A DC charging high voltage circuit according to any of claims 1-13, characterized in that, The land power supply module is further configured to detect a temperature of the charging pile, limit a charging current of the charging pile when the temperature exceeds a first preset temperature, and control the fast-charging switch circuit to be disconnected when the temperature exceeds a second preset temperature.

15. A method of controlling a DC charging high voltage circuit, characterized by, The direct-current charging high-voltage circuit is used for a land vehicle of a flying vehicle, the flying vehicle comprising the land vehicle and an aircraft, the direct-current charging high-voltage circuit comprising a high-voltage connector, a fast charging switch circuit and a land power supply module, the land power supply module having a split switch circuit for controlling connection or disconnection of the high-voltage connector and the fast charging switch circuit, the land power supply module being electrically connected with the high-voltage connector, the high-voltage connector being used for plugging with an air power supply module, an input end of the fast charging switch circuit being connected with a first end of a charging pile, an output end of the fast charging switch circuit being connected with a first input end of the split switch circuit, a second input end of the split switch circuit being connected with a second end of the charging pile. The method comprises: when receiving a charging request of the air power supply module, controlling the split switch circuit and the fast charging switch circuit to be turned on, and performing high-voltage power-off of a battery of the land power supply module; when identifying that a positive signal of a low-voltage auxiliary power supply of the charging pile is valid, performing charging handshake with the charging pile, and requesting the charging pile to output corresponding charging voltage according to a charging parameter of the air power supply module, and outputting the charging voltage to the air power supply module through the high-voltage connector.

16. A land vehicle, characterized by The direct-current charging high-voltage circuit as claimed in any one of claims 1-14.

17. A land-air split type air mobile, characterized by, The flying vehicle comprising an aircraft and the land vehicle as claimed in claim 16. The flying vehicle comprising an aircraft and the land vehicle as claimed in claim 16.

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