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

Abstract

The application discloses a DC charging high-voltage circuit, a land vehicle and a land-air split type flying vehicle, and relates to the technical field of automobiles.The land-air split type flying vehicle comprises a land vehicle and a flying vehicle, and the DC charging high-voltage circuit comprises a high-voltage connector, a land power supply module and a fast charging circuit.The land power supply module is electrically connected with the high-voltage connector, the high-voltage connector is connected with an air power supply module of the flying vehicle, the fast charging circuit is connected with a charging pile and the land power supply module, and the land power supply module has a split switch circuit.When the land power supply module receives a charging request of the air power supply module, the split switch circuit is controlled to be turned on, the fast charging circuit is controlled to be turned on when the air power supply module meets the charging parameter requirement, 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 can realize the fast charging function and lightweight design of the flying vehicle in the land-air split type flying vehicle.

Description

TECHNICAL FIELD

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

[0002] The land-air split type flying automobile is composed of two parts of an aircraft and a vehicle, which can run as two independent parts or as a combined whole. The aircraft is designed to be lightweight, and the battery capacity is not too high, so there are many scenarios that require fast energy replenishment, and the fast charging function is particularly important. To achieve this function, a fast charging function needs to be added to the aircraft, which requires the addition of a fast charging relay, a fast charging wire harness, a fast charging interface, etc., thereby greatly increasing 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, a land vehicle and a land-air split type flying automobile, which aims to realize the lightweight design of the land-air split type flying automobile.

[0004] To this end, the present application provides a direct-current charging high-voltage circuit for a land vehicle of a flying automobile, the flying automobile comprising the land vehicle and an aircraft, the direct-current charging high-voltage circuit comprising a high-voltage connector, a land power supply module and a fast charging 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 of the aircraft; an input end of the fast charging circuit is used for accessing a charging pile, and an output end of the fast charging circuit is electrically connected with 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 circuit; the land power supply module is used for controlling the split switch circuit to be turned on when receiving a charging request of the air power supply module, controlling the fast charging circuit to be turned on when the air power supply module meets the charging parameter requirement, and 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.

[0005] In an embodiment, the land power supply module is further used for controlling the split switch circuit to be disconnected when receiving a charging end request of the air power supply module, and requesting the charging pile to output a corresponding charging voltage according to the charging parameter of the land power supply module when the land power supply module meets the charging condition, and receiving the charging voltage through the fast charging circuit; and / or, the land power supply module is further used for controlling the split switch circuit to be disconnected when receiving the charging end request of the air power supply module, and controlling the fast charging circuit to be turned off when the land power supply module does not meet the charging condition.

[0006] In an embodiment, the land power supply module comprises a first control circuit and a land vehicle battery pack, the first control circuit is configured to be connected with a second control circuit of the air power supply module; the first control circuit is electrically connected with the charging pile and the split switch circuit respectively, and the high-voltage connector is electrically connected with the land vehicle battery pack and the air power supply module respectively; when receiving a charging request of the second control circuit, the first control circuit controls the split switch circuit to be turned on, controls the fast charging circuit to be turned on when the air power supply module meets the charging parameter requirement, 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; when receiving a charging end request of the second control circuit, the first control circuit controls the split switch circuit to be turned off, and requests the charging pile to output a corresponding charging voltage according to the charging parameter of the land vehicle battery pack when the land vehicle battery pack meets the charging condition, so as to output the charging voltage to the land vehicle battery pack through the fast charging circuit.

[0007] In an embodiment, the split switch circuit comprises a split relay connected in series between the high-voltage connector and the fast charging circuit, and the split relay is connected with the first control circuit; the first control circuit is specifically configured to control the split relay to be turned on or turned off, so that the high-voltage connector is connected with or disconnected from the fast charging circuit.

[0008] In an embodiment, the fast charging circuit comprises a fast charging relay, an input end of the fast charging relay is connected with the charging pile, an output end of the fast charging relay is connected with the split switch circuit, and the fast charging relay is connected with the first control circuit; a fast charging interface is connected in series between the charging pile and the fast charging relay; the fast charging interface is configured to establish a connection relationship between the charging pile and the fast charging relay; and the first control circuit is specifically configured to control the fast charging relay to be turned on when the second control circuit meets the charging parameter requirement.

[0009] In an embodiment, the land power supply module further comprises a first switch circuit and a second switch circuit; the first switch circuit is connected in series between the split switch circuit and a positive electrode of the land vehicle battery pack, and the second switch circuit is connected in series between a negative electrode of the land vehicle battery pack and the high-voltage connector; the first control circuit is connected with the first switch circuit and the second switch circuit respectively; and the first control circuit is specifically configured to control the first switch circuit and the second switch circuit to be turned off when receiving a charging request sent by the second control circuit, and control the split switch circuit to be turned on when confirming that the first switch circuit is turned off.

[0010] In an embodiment, the first control circuit is further configured to detect a front-end voltage and a back-end voltage of the first switch circuit, and determine that the first switch circuit is disconnected when a difference between the front-end voltage and the back-end voltage is greater than a first preset voltage.

[0011] In an embodiment, the land power supply module further comprises a pre-charge switch circuit, a first end of the pre-charge switch circuit being connected to a first end of the first switch circuit, and a second end of the pre-charge switch circuit being connected to a second end of the first switch circuit; and the first control circuit is specifically configured to control the second switch circuit and the pre-charge switch circuit to be turned on to pre-charge the land vehicle battery pack when controlling the split switch circuit to be disconnected, and turn on the first switch circuit and turn off the pre-charge switch circuit when determining that the land vehicle battery pack meets a pre-charge condition.

[0012] In an embodiment, the first control circuit is further configured to detect a front-end voltage and a back-end voltage of the first switch circuit, and determine that the land vehicle battery pack is pre-charged successfully when the front-end voltage and the back-end voltage meet a pre-charge condition.

[0013] In an embodiment, 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 circuit to be disconnected when the temperature exceeds a second preset temperature.

[0014] The application further provides a land vehicle comprising the DC charging high-voltage circuit.

[0015] The application further provides a land-air split type flying vehicle comprising the land vehicle and the aircraft.

[0016] The application provides a DC charging high-voltage circuit, a land vehicle and a land-air split type flying vehicle, and relates to the technical field of vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present 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 represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the drawings shown without any creative effort.

[0018] Figure 1 The circuit flow chart of the direct current charging high voltage circuit of the present application;

[0019] Figure 2 The circuit structure diagram of the land-air split type flying car of the present application.

[0020] Explanation of reference numerals:

[0021] 10, fast charging circuit; 20, land power supply module; 30, high voltage plug; K1, first relay; K2, second relay; K3, third relay; K4, fourth relay; K5, first fast charging relay; K6, second fast charging relay; K7, pre-charging relay; K9, split relay.

[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0025] 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 the internal connection of two elements or the 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.

[0026] In addition, the description such as "first", "second" and the like 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 defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0027] The land-air split type flying car is composed of two parts of aircraft and 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. In order to realize this function, the fast charging relay, fast charging wire harness, fast charging interface and the like need to be added to the aircraft end, which will greatly increase the use cost and the weight of the whole machine.

[0028] In order to simultaneously realize the fast charging function and lightweight design of the aircraft in the land-air split type flying car, the present 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 a high voltage connector 30, a land power supply module 20 and a fast charging circuit 10;

[0029] 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 an air power supply module of the aircraft;

[0030] The input end of the fast charging circuit 10 is used for connecting a charging pile, and the output end of the fast charging circuit 10 is electrically connected with the land power supply module 20;

[0031] The land power supply module 20 has a split switch circuit for controlling the connection or disconnection of the high voltage connector 30 and the fast charging circuit 10;

[0032] The land power supply module 20 is used for controlling the split switch circuit to be turned on when receiving a charging request of the air power supply module, and controlling the fast charging circuit 10 to be turned on when the air power supply module meets the charging parameter requirement, and 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 30.

[0033] It can be understood that in the existing land-air split type flying car, the aircraft has to increase the fast charging relay, the fast charging wire harness, the fast charging interface and the like when realizing the fast charging function, which greatly increases the use cost and the overall weight of the aircraft. In order to realize the fast charging function and the lightweight design of the aircraft in the land-air split type flying car, the application combines the configuration characteristics of the land-air split type flying car, designs the fast charging relay and the fast charging interface at the car end, and the aircraft and the car share the fast charging interface, the fast charging relay and the communication interface. When the land-air split type flying car is fast charging, the fast charging circuit at the car end is connected with the high-voltage circuit of the aircraft, the aircraft and the car end communicate with each other through CAN, and the car end forwards the charging demand of the aircraft to the charging pile through the direct current CAN communication protocol, so as to ensure the charging demand of the aircraft. The application can not only meet the fast charging demand of the car end, but also meet the fast charging demand of the aircraft, and can automatically switch to the car fast charging after the aircraft is charged, so as to realize the fast charging function of the land-air split type flying car with the design goals of low cost and lightweight.

[0034] In the embodiment, the direct current charging high-voltage circuit includes a high-voltage connector 30, an air power supply module and a land power supply module 20. The air power supply module is used to supply power to the aircraft. The land power supply module 20 is used to supply power to the land vehicle. The high-voltage connector 30 is used to connect the high-voltage circuit of the air power supply module with the fast charging circuit of the land power supply module 20. In addition, the land power supply module 20 receives the charging request, the charging end request and the charging parameter sent by the air power supply module through the CAN communication protocol. The land power supply module 20 transmits 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 the land power supply module 20 sends its own charging parameter to the charging pile through the direct current CAN communication protocol.

[0035] In practical application, when the aircraft needs to be charged, the air power supply module sends a charging request to the land power supply module 20 through the CAN communication protocol. When the land power supply module 20 receives the charging request of the air power supply module, the control split switch circuit is turned on to turn on the path between the fast charging circuit 10 and the high-voltage connector 30. Before the control split switch circuit is turned on, the land power supply module 20 controls the main positive relay and the main negative relay to be disconnected, and after determining that the main positive relay is disconnected, the control split switch circuit is turned on. The air power supply module interacts with the land power supply module 20 according to the “GB / T 27930-2015 Communication Protocol between Electric Vehicle Non-vehicle Conductive Charger and Battery Management System”, the land power supply module 20 receives the charging parameters sent by the air power supply module, and real-time forwards the charging parameters of the air power supply module to the charging pile. The charging parameters include the required current, the required voltage, and the protection parameters. Until the land power supply module 20 sends the BRO=0x00 message to the charging pile, it confirms that the charging parameters of the air power supply module meet the standard charging parameter requirements of the charging pile. The land power supply module 20 controls the fast charging circuit 10 to be turned on to turn on the path between the charging pile and the split switch circuit, and requests the charging pile to output the corresponding charging voltage according to the charging parameter of the air power supply module. The charging voltage output by the charging pile is output to the air power supply module after passing through the fast charging circuit 10, the split switch circuit and the high-voltage connector 30, so as to charge the battery pack of the air power supply module.

[0036] The present application provides a DC charging high-voltage circuit, which comprises a land vehicle for a flying vehicle, the flying vehicle comprising the land vehicle and an aircraft, and the DC charging high-voltage circuit comprising a high-voltage connector 30, a land power supply module 20 and a fast charging circuit 10. 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 an air power supply module of the aircraft. An input end of the fast charging circuit 10 is used for connecting a charging pile, and an output end of the fast charging circuit 10 is electrically connected with the land power supply module 20. In practical application, the land power supply module 20 is used for controlling the split switch circuit to be turned on when receiving a charging request of the air power supply module, and controlling the fast charging circuit 10 to be turned on when the air power supply module meets the charging parameter requirements, and requesting the charging pile to output the 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 30. The present application can realize the fast charging function of the aircraft in the land-air split flying vehicle with the design goals of low cost and light weight.

[0037] In an embodiment, reference is made to Figure 1, the land power supply module 20 is further configured to control the split switch circuit to be disconnected when receiving the charging end request of the aerial power supply module, and request the charging pile to output a corresponding charging voltage according to the charging parameter of the land power supply module 20 when the land power supply module 20 meets the charging condition, and receive the charging voltage through the fast charging circuit 10.

[0038] It can be understood that when the aerial vehicle 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, the split switch circuit is controlled to be disconnected to disconnect the path between the fast charging circuit 10 and the high-voltage connector 30. After the split switch circuit is controlled to be disconnected, the land power supply module 20 needs to first detect whether the remaining power of the land power supply module 20 is less than or equal to the preset power, so as to turn on or turn off the fast charging circuit 10 to determine whether to charge the land power supply module 20.

[0039] Preferably, the preset power is 90% of the total power of the land power supply module 20. In this embodiment, 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, at which time the land power supply module 20 meets the charging condition, and the fast charging circuit 10 is maintained in the turned-on state. The land power supply module 20 sends the charging parameter of the aerial power supply module to the charging pile through the direct-current CAN communication protocol, and the charging parameter specifically includes: 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. At this time, the aerial power supply module disconnects the main positive relay and the main negative relay of itself, and the land power supply module 20 controls the split switch circuit to be disconnected when confirming that the main positive relay of the aerial power supply module is disconnected. At this time, the land power supply module 20 first precharges the high-voltage loop of the automobile end, and charges the land automobile battery pack after the precharging is successful. Specifically, the land power supply module 20 sends its charging parameter to the charging pile through the direct-current CAN communication protocol, and the charging parameter specifically includes: the charging voltage is the current voltage of the automobile end + 5V, and the required current is the current value allowed by the automobile end to charge. When the land power supply module 20 meets the charging condition, the charging pile outputs a corresponding charging voltage according to the charging parameter of the land power supply module 20, and the charging voltage output by the charging pile is output to the land power supply module 20 through the fast charging circuit 10 to charge the battery pack of the land power supply module 20. Wherein, the land power supply module 20 meeting the charging condition means that the charging parameter (the current voltage of the automobile end + 5V, and the required current is the current value allowed by the automobile end to charge) sent by the land power supply module 20 to the charging pile meets the standard charging parameter requirement of the charging pile. This embodiment can not only meet the fast charging demand of the automobile end, but also meet the fast charging demand of the aerial vehicle, and can automatically switch to automobile fast charging after the aerial vehicle completes charging, so as to realize the fast charging function of the land-air split type flying automobile with the design goals of low cost and light weight.

[0040] In an embodiment, referring to Figure 1 , the land power supply module 20 is further configured to control the split switch circuit to be disconnected when receiving the charging end request from the aerial power supply module, and control the fast charging circuit 10 to be closed when the land power supply module 20 does not meet the charging condition.

[0041] It can be understood that, preferably, the preset power is 90% of the total power of the land power supply module 20. In this embodiment, when the aircraft 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, the land power supply module 20 controls the split switch circuit to be disconnected, so as to disconnect the path between the fast charging circuit 10 and the high-voltage connector 30. After the split switch circuit is controlled to be disconnected, the land power supply module 20 detects that the remaining power is greater than 90% of the total power of the land power supply module 20. At this time, it can be considered that the land power supply module 20 does not meet the charging condition, and the remaining power is sufficient, so that the land power supply module 20 does not need to be charged, and the charging can be directly ended, that is, the fast charging circuit 10 is disconnected.

[0042] In an embodiment, referring to Figure 1 , the land power supply module 20 is further configured to control the split switch circuit to be disconnected when receiving the charging end request from the aerial power supply module, and control the fast charging circuit 10 to be closed when the land power supply module 20 does not meet the charging condition.

[0043] and, the land power supply module 20 is further configured to control the split switch circuit to be disconnected when receiving the charging end request from the aerial power supply module, and control the fast charging circuit 10 to be closed when the land power supply module 20 does not meet the charging condition.

[0044] It can be understood that, preferably, the preset power is 90% of the total power of the land power supply module 20. In this embodiment, when the aircraft ends charging or completes charging, the air power supply module sends a charging end request to the land power supply module 20 through the CAN communication protocol, and when the land power supply module 20 receives the charging end request, the control split switch circuit is controlled to be turned off to disconnect the path between the fast charging circuit 10 and the high-voltage connector 30. After the control split switch circuit is turned off, 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, at which time the land power supply module 20 meets the charging condition, and the fast charging circuit 10 is maintained in an open state. The land power supply module 20 charges the charging pile with its own charging parameters through the DC CAN communication protocol, so as to request the charging pile to output a corresponding charging voltage according to the charging parameters of the land power supply module 20, and receive the charging voltage through the fast charging circuit 10; until the remaining power of the land power supply module 20 is greater than 90% of the total power of the land power supply module 20, at which time it can be considered that the land power supply module 20 does not meet the charging condition, and its remaining power is sufficient, so that the land power supply module 20 does not need to be charged, and the charging can be directly ended, that is, the fast charging circuit 10 is turned off.

[0045] In an embodiment, referring to Figure 2 , the land power supply module 20 comprises a first control circuit and a land vehicle battery pack, and the first control circuit is used to connect with the second control circuit of the air power supply module;

[0046] The first control circuit is electrically connected with the second control circuit, the charging pile and the split switch circuit respectively, and the high-voltage connector 30 is electrically connected with the land vehicle battery pack and the air power supply module respectively;

[0047] The first control circuit is used to control the split switch circuit to be turned on when receiving the charging request of the second control circuit, control the fast charging circuit 10 to be turned on when the air power supply module meets the charging parameter requirement, and request the charging pile to output a corresponding charging voltage according to the charging parameters of the air power supply module, and output the charging voltage to the air power supply module through the high-voltage connector 30;

[0048] When receiving the charging end request of the second control circuit, the first control circuit controls the split switch circuit to be turned off, and when the land vehicle battery pack meets the charging condition, the first control circuit requests the charging pile to output a corresponding charging voltage according to the charging parameters of the land vehicle battery pack, so as to output the charging voltage to the land vehicle battery pack through the fast charging circuit 10.

[0049] It can be understood that the aerial power supply module includes a second control circuit and an aerial vehicle battery pack, and the first control circuit is used for communicating with the second control circuit to control the aerial vehicle battery pack to be charged through the second control circuit. In the embodiment, the first control circuit and the second control circuit are both implemented by a battery management system (BMS). Preferably, the first control circuit and the second control circuit realize communication interaction through a CAN communication protocol, and the first control circuit and the charging pile realize communication interaction through a direct current CAN communication protocol.

[0050] In actual application, when the aerial vehicle needs to be charged, the second control circuit judges whether the aerial vehicle battery pack has a fault that does not allow charging, and after the judgment is completed, sends a charging request to the first control circuit through the CAN communication protocol. When the first control circuit receives the charging request of the second control circuit, the control split switch circuit is turned on to turn on the path between the fast charging circuit 10 and the high-voltage connector 30. Before the control split switch circuit is turned on, the first control circuit controls the land power supply module 20 to control the main positive relay and the main negative relay of the land power supply module 20 to be disconnected, and after it is determined that the main positive relay is disconnected, the control split switch circuit is turned on. The second control circuit interacts with the first control circuit according to the communication protocol between the non-vehicle conductive charger and the battery management system of the electric vehicle in GB / T 27930-2015 to send the charging parameters of the aerial vehicle battery pack to the first control circuit, and the first control circuit forwards the charging parameters of the aerial vehicle battery pack to the charging pile in real time. The charging parameters include the required current, the required voltage, and the protection parameters. After the first control circuit sends the BRO=0x00 message to the charging pile, it is confirmed that the charging parameters of the aerial vehicle battery pack meet the standard charging parameter requirements of the charging pile, and the first control circuit controls the fast charging circuit 10 to be turned on to turn on the path between the charging pile and the split switch circuit. The first control circuit requests the charging pile to output the corresponding charging voltage according to the charging parameters of the aerial vehicle battery pack, and the charging voltage output by the charging pile is output to the aerial vehicle battery pack through the fast charging circuit 10, the split switch circuit and the high-voltage connector 30 to charge the aerial vehicle battery pack.

[0051] When the aerial vehicle ends charging or completes charging, the second control circuit sends a charging end request to the first control circuit through the CAN communication protocol. When the first control circuit receives the charging end request of the second control circuit, the remaining power of the land vehicle battery pack is detected. When the remaining power of the land vehicle battery pack is less than or equal to 90% of the total power of the land vehicle battery pack, it is determined to charge the land power supply module 20, that is, the charging parameters (the current voltage of the aerial vehicle + 5V, and the required current is 0A) of the aerial vehicle battery pack are sent to the charging pile through the DC CAN communication protocol. The first control circuit controls the second control circuit to disconnect the main positive relay and the main negative relay of the aerial power supply module itself through the CAN communication protocol. When the first control circuit confirms that the main positive relay of the aerial power supply module is disconnected, the split switch circuit is controlled to be disconnected to disconnect the path between the fast charging circuit 10 and the high-voltage connector 30. At this time, the first control circuit first controls the land vehicle battery pack to pre-charge the high-voltage loop, and after pre-charging is successful, the land vehicle battery pack is charged. Specifically, the first control circuit obtains the charging parameters of the land vehicle battery pack, and sends the charging parameters (the charging voltage is the current voltage of the vehicle end + 5V, and the required current is the allowed current value of the vehicle end charging) of the land vehicle battery pack to the charging pile through the DC CAN communication protocol. When the land vehicle battery pack meets the standard charging parameter requirements of the charging pile, the charging pile outputs the corresponding charging voltage according to the charging parameter request of the land vehicle battery pack, and the charging voltage output by the charging pile is output to the land vehicle battery pack after passing through the fast charging circuit 10, so as to charge the land vehicle battery pack.

[0052] In an embodiment, referring to Figure 2 , the split switch circuit comprises:

[0053] A split relay K9 is connected in series between the high-voltage connector 30 and the fast charging circuit 10, and the split relay K9 is connected with the first control circuit.

[0054] The first control circuit is specifically configured to control the split relay K9 to be turned on or turned off, so as to connect or disconnect the high-voltage connector 30 and the fast charging circuit 10.

[0055] It can be understood that in the embodiment, the split switch circuit is implemented by using a split relay K9, which is connected in series between the high-voltage connector 30 and the fast charging circuit 10, and is used to turn on or turn off the path between the high-voltage connector 30 and the fast charging circuit 10. In actual application, when the first control circuit receives the charging request of the second control circuit, the split relay K9 is controlled to be closed to turn on the path between the fast charging circuit 10 and the high-voltage connector 30, and to turn on the fast charging circuit 10, at this time, the charging voltage output by the charging pile is output to the aircraft battery pack through the fast charging circuit 10, the split relay K9 and the high-voltage connector 30 in turn. When the first control circuit receives the charging end request of the second control circuit, the split relay K9 is controlled to be turned off to turn off the path between the fast charging circuit 10 and the high-voltage connector 30, at this time, the path between the charging pile and the high-voltage connector 30 is turned off, and the charging voltage output by the charging pile cannot be transmitted to the aircraft battery pack through the high-voltage connector 30.

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

[0057] a fast charging relay, an input end of the fast charging relay being connected with the charging pile, an output end of the fast charging relay being connected with the split switch circuit, the fast charging relay being connected with the first control circuit;

[0058] a fast charging interface, the fast charging interface being connected in series between the charging pile and the fast charging relay; the fast charging interface is used to establish a connection relationship between the charging pile and the fast charging relay;

[0059] the first control circuit is specifically used to control the fast charging relay to be turned on when the second control circuit meets the charging parameter requirement.

[0060] It can be understood that in the embodiment, the fast charging circuit 10 is implemented by using a fast charging relay and a fast charging interface, and the fast charging relay comprises a first fast charging relay K5 and a second fast charging relay K6. The fast charging interface is used to access the charging pile, the first end of the first fast charging relay K5 and the first end of the second fast charging relay K6 are connected with the fast charging interface respectively, the second end of the first fast charging relay K5 is connected with the positive electrode of the land vehicle battery pack and the split switch circuit respectively, and the second end of the second fast charging relay K6 is connected with the negative electrode of the land vehicle battery pack and the split switch circuit respectively.

[0061] In actual application, when the first control circuit confirms that the charging parameter of the aerial vehicle battery pack meets the standard charging parameter requirement of the charging pile, the first control circuit controls the split switch circuit to be turned on and controls the fast charging relay to be closed, so as to turn on the path between the charging pile and the split switch circuit, at this time, the charging voltage output by the charging pile is output to the aerial vehicle battery pack through the fast charging interface, the fast charging relay, the split switch circuit and the high-voltage plug-in part 30 in turn. When the first control circuit receives the charging end request of the second control circuit, the first control circuit controls the split switch circuit to be turned off, so as to turn off the path between the split switch circuit and the high-voltage plug-in part 30, and the fast charging relay remains in the closed state, at this time, the path between the fast charging relay and the high-voltage plug-in part 30 is turned off, and the charging voltage output by the charging pile is transmitted to the aerial vehicle battery pack.

[0062] In an embodiment, referring to Figure 2 , the land power supply module 20 further comprises a first switch circuit and a second switch circuit;

[0063] The first switch circuit is connected in series between the split switch circuit and the positive electrode of the land vehicle battery pack, and the second switch circuit is connected in series between the negative electrode of the land vehicle battery pack and the high-voltage plug-in part 30; the first control circuit is connected with the first switch circuit and the second switch circuit respectively;

[0064] The first control circuit is specifically configured to control the first switch circuit and the second switch circuit to be turned off when receiving the charging request sent by the second control circuit, and control the split switch circuit to be turned on when confirming that the first switch circuit is turned off.

[0065] It can be understood that before the split switch circuit is turned on, the main positive relay and the main negative relay of the land power supply module 20 need to be turned off, so as to ensure that the high-voltage connection at the vehicle end is in an off state, and the aerial power supply module can be powered. After the split switch circuit is turned off, the main positive relay and the main negative relay of the land power supply module 20 need to be turned on, so as to ensure that the high-voltage connection at the vehicle end is in an on state, and the land power supply module 20 can be powered. In this embodiment, the first switch circuit is implemented by a first relay K1, which is the main positive relay of the land power supply module 20; the second switch circuit is implemented by a second relay K2, which is the main negative relay of the land power supply module 20. The first end of the first relay K1 is connected with the first fast charging relay K5, and the second end of the first relay K1 is connected with the positive electrode of the land vehicle battery pack. The first end of the second relay K2 is connected with the negative electrode of the land vehicle battery pack, and the second end of the second relay K2 is connected with the second fast charging relay K6. The first relay K1 is used to turn on or turn off the path between the first fast charging relay K5 and the positive electrode of the land vehicle battery pack; the second relay K2 is used to turn on or turn off the path between the second fast charging relay K6 and the negative electrode of the land vehicle battery pack.

[0066] In practical application, when the first control circuit receives the charging request of the second control circuit, the current direct current charging mode for the aircraft is identified, the first control circuit controls the first switch circuit and the second switch circuit to be disconnected, so as to disconnect the path between the first fast charging relay K5 and the positive electrode of the land vehicle battery pack and the path between the second fast charging relay K6 and the negative electrode of the land vehicle battery pack. When it is confirmed that the first relay K1 is disconnected, it is confirmed that the automobile end high-voltage connection has been disconnected, that is, the split switch circuit is turned on, so that the charging voltage of the charging pile is powered by the air supply module. When the first control circuit receives the charging end request of the second control circuit, the split switch circuit is disconnected, and the first relay K1 and the second relay K2 are controlled to be turned on, so that the charging voltage of the charging pile is powered by the land supply module 20.

[0067] In an embodiment, referring to Figure 2 , the first control circuit is further configured to detect the front-end voltage and the back-end voltage of the first switch circuit, and confirm that the first switch circuit is disconnected when the difference between the front-end voltage and the back-end voltage is greater than a first preset voltage.

[0068] It can be understood that by detecting the difference between the front-end voltage and the back-end voltage of the first relay K1, it can be confirmed whether the first relay K1 is in a disconnected state, and then the split switch circuit can be further controlled to be turned on. In this embodiment, the front-end voltage of the first relay K1 is the voltage on the side of the first relay K1 close to the positive electrode of the land vehicle battery pack, and the back-end voltage of the first relay K1 is the voltage on the side of the first relay K1 close to the first pre-charging relay K7. The front-end voltage of the first relay K1 is defined as Uk11, the back-end voltage of the first relay K1 is defined as Uk12, and the first preset voltage is defined as U1, which is preferably equal to 100V. When Uk11-Uk12>U1, it is confirmed that the first relay K1 is disconnected, and then it is confirmed that the automobile end high-voltage connection has been disconnected. At this time, the split switch circuit can be turned on, so that the charging voltage of the charging pile is powered by the air supply module.

[0069] In an embodiment, referring to Figure 2 , the land supply module 20 further comprises:

[0070] a pre-charging switch circuit, a first end of the pre-charging switch circuit being connected with a first end of the first switch circuit, and a second end of the pre-charging switch circuit being connected with a second end of the first switch circuit;

[0071] The first control circuit is specifically configured to control the second switch circuit and the pre-charging switch circuit to be turned on to pre-charge the land vehicle battery pack when the split switch circuit is controlled to be turned off, and turn on the first switch circuit and turn off the pre-charging switch circuit when it is confirmed that the land vehicle battery pack meets the pre-charging condition.

[0072] It can be understood that, in order to prevent the charging current of the charging pile from damaging the main positive relay (first relay K1) of the land power supply module 20, the land vehicle battery pack is pre-charged to the high-voltage loop at the vehicle end before the first relay K1 is controlled to be turned on to charge the land vehicle battery pack. Therefore, when the first control circuit controls the split switch circuit to be turned off, the high-voltage loop at the vehicle end needs to be pre-charged first, and after the pre-charging is successful, the first control circuit sends the charging parameters of itself to the charging pile, and requests the charging pile to output the corresponding charging voltage according to the charging parameters of the land power supply module 20.

[0073] In the embodiment, the pre-charging switch circuit is implemented by using a pre-charging relay K7, and the specific process that the land vehicle battery pack pre-charges the high-voltage loop at the vehicle end is as follows: the first control circuit sends the charging parameters to the charging pile through the direct-current CAN communication protocol, and the charging parameters are specifically the current voltage at the vehicle end + 5V and the required current of 0A. At the same time, the first control circuit closes the second relay K2, and then closes the pre-charging relay K7, so that the land vehicle battery pack pre-charges the high-voltage loop. When it is confirmed that the front-end voltage and the rear-end voltage of the first relay K1 meet the pre-charging condition, it is confirmed that the pre-charging of the high-voltage loop of the land vehicle battery pack is successful, then the first relay K1 is closed, the closed state of the second relay K2 is maintained, and the pre-charging relay K7 is disconnected, so that the charging voltage of the charging pile is transmitted to the land vehicle battery pack through the fast-charging interface, the fast-charging relay and the first relay K1, to supply power to the land vehicle battery pack.

[0074] In an embodiment, with reference to Figure 2 , the first control circuit is further configured to detect the front-end voltage and the rear-end voltage of the first switch circuit, and confirm that the land vehicle battery pack is pre-charged successfully when the front-end voltage and the rear-end voltage meet the pre-charging condition.

[0075] 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 confirmed whether the first relay K1 meets the pre-charging condition, and the first relay K1 is further controlled to be closed when it is confirmed that the first relay K1 meets the pre-charging condition. In the embodiment, the front end voltage of the first relay K1 is the voltage of the positive side of the land vehicle battery pack close to the first relay K1; the back end voltage of the first relay K1 is the voltage of the side close to the first pre-charging relay K7 of the first relay K1. The front end voltage of the first relay K1 is defined as Uk11, the back end voltage of the first relay K1 is defined as Uk12, and Uk12≥m*Uk11 is set as the pre-charging condition of the first relay K1, wherein m is a coefficient, and preferably m is set to 95%. For example, when Uk12≥m*Uk11, it is confirmed that the first relay K1 meets the pre-charging condition, that is, it is confirmed that the high-voltage loop of the land vehicle battery pack is pre-charged successfully, the first control circuit closes the first relay K1, maintains the closed state of the second relay K2, and disconnects the pre-charging relay K7.

[0076] In an embodiment, with reference to Figure 2 , the over-the-air power supply module further comprises a third switch circuit and a fourth switch circuit;

[0077] The third switch circuit is connected in series between the positive pole of the aircraft battery pack and the high-voltage connector 30, and the fourth switch circuit is connected in series between the negative pole of the aircraft battery pack and the high-voltage connector 30, and the second control circuit is connected with the third switch circuit and the fourth switch circuit respectively;

[0078] The first control circuit is specifically configured to, when receiving the charging end request of the second control circuit and the land vehicle battery pack meets the charging condition, control the third switch circuit and the fourth switch circuit to be disconnected through the second control circuit, and when confirming that the third switch circuit is disconnected through the second control circuit, control the split switch circuit to be disconnected.

[0079] It can be understood that in the embodiment, the third switch circuit is implemented by a third relay K3, and the fourth switch circuit is implemented by a fourth relay K4. In actual application, when the first control circuit receives the charging end request of the second control circuit, and detects that the remaining power of the land vehicle battery pack is less than or equal to 90% of the total power of the land vehicle battery pack, the first control circuit sends the charging parameters (the current voltage of the aircraft battery pack + 5V, and the required current is 0A) of the aircraft battery pack to the charging pile through the direct current CAN communication protocol, so that the charging pile stops supplying power to the air power supply module. At the same time, the first control circuit controls the third relay K3 and the fourth relay K4 to be disconnected through the second control circuit, wherein the third relay K3 represents the main positive relay of the air power supply module, and the fourth relay K4 represents the main negative relay of the air power supply module. When the first control circuit confirms that the third relay K3 is disconnected through the second control circuit, the first control circuit controls the split switch circuit to be disconnected, so as to disconnect the path between the fast charging circuit 10 and the high-voltage connector 30.

[0080] In an embodiment, referring to Figure 2 , the second control circuit is further configured to detect the front-end voltage and the back-end voltage of the third switch circuit, and confirm that the third switch circuit is disconnected when the difference between the front-end voltage and the back-end voltage is greater than a second preset voltage.

[0081] It can be understood that by detecting the relationship between the front-end voltage and the back-end voltage of the third relay K3, it can be confirmed whether the third relay K3 is in a disconnected state, and the first control circuit can further control the split switch circuit to be disconnected. In the embodiment, the front-end voltage of the third relay K3 is the voltage on the positive side of the aircraft battery pack close to the third relay K3, and the back-end voltage of the third relay K3 is the voltage on the side close to the high-voltage connector 30. The front-end voltage of the third relay K3 is defined as Uk31, the back-end voltage of the third relay K3 is defined as Uk32, and the second preset voltage is defined as U2. Preferably, U2 is equal to 100V. When Uk31-Uk32>U2, the first control circuit confirms that the third relay K3 is disconnected, that is, the split switch circuit is disconnected.

[0082] In an embodiment, referring to Figure 2 , the land power supply module 20 is further configured to detect the temperature of the charging pile, and limit the charging current of the charging pile when the temperature exceeds a first preset temperature, and control the fast charging circuit 10 to be disconnected when the temperature exceeds a second preset temperature.

[0083] It can be understood that in the embodiment, the first preset temperature is set as T1, the second preset temperature is set as T2, the second preset temperature is the highest temperature limit, and T2 is greater than T1. In actual application, when the land-air separated type flying automobile 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, so as to limit 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 as demand current*n, wherein n is a coefficient, and preferably, n is set as 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 quick charging circuit 10 to be disconnected, so as to disconnect the path between the charging pile and the land power supply module 20.

[0084] The application further provides a land automobile, which comprises the direct-current charging high-voltage circuit as described above.

[0085] It can be understood that referring to Figure 1 , the land automobile comprises the direct-current charging high-voltage circuit, which comprises the high-voltage connector 30, the land power supply module 20 and the quick charging circuit 10. In actual application, the land power supply module 20 receives the charging voltage of the charging pile through the quick charging circuit 10, and transmits the charging voltage to the battery pack of the land automobile to charge the battery pack of the land automobile. 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 quick charging 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 quick charging circuit 10 to the aircraft through the high-voltage connector 30 to charge the aircraft, so that the aircraft has the quick charging function.

[0086] The application further provides a land-air separated type flying automobile, which comprises the land automobile and the aircraft as described above.

[0087] It can be understood that the land-air separated type flying automobile comprises the land automobile and the aircraft, and the specific circuit structure of the land-air separated type flying automobile refers to the above-mentioned embodiments. Since the land-air separated type flying automobile adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described here in detail.

[0088] The above merely describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present 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 a high-voltage connector, a land power supply module and a fast charging 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 aerial power supply module of the aircraft; An input end of the fast charging circuit is used for accessing a charging pile, and an output end of the fast charging circuit is electrically connected with 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 circuit; The land power supply module is configured to control the split switch circuit to be turned on when receiving a charging request of the aerial power supply module, control the fast charging circuit to be turned on when the aerial power supply module meets a charging parameter requirement, request a charging pile to output a corresponding charging voltage according to a charging parameter of the aerial power supply module, and output the charging voltage to the aerial 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 control the split switch circuit to be turned off when receiving a charging end request of the aerial power supply module, and request the charging pile to output a corresponding charging voltage according to a charging parameter of the land power supply module when the land power supply module meets a charging condition, and receive the charging voltage through the fast charging circuit; And / or, the land power supply module is further configured to control the split switch circuit to be turned off when receiving a charging end request of the aerial power supply module, and control the fast charging circuit to be turned off when the land power supply module does not meet the charging condition.

3. The DC charging high voltage circuit of claim 1, wherein, The land power supply module comprises a first control circuit and a land vehicle battery pack, and the first control circuit is configured to be connected with a second control circuit of the aerial power supply module; The first control circuit is electrically connected with the charging pile and the split switch circuit respectively, and the high-voltage connector is electrically connected with the land vehicle battery pack and the aerial power supply module respectively; The first control circuit is configured to control the split switch circuit to be turned on when receiving a charging request of the second control circuit, control the fast charging circuit to be turned on when the aerial power supply module meets a charging parameter requirement, request a charging pile to output a corresponding charging voltage according to a charging parameter of the aerial power supply module, and output the charging voltage to the aerial power supply module through the high-voltage connector; The first control circuit is configured to control the split switch circuit to be turned off when receiving a charging end request of the second control circuit, and request a charging pile to output a corresponding charging voltage according to a charging parameter of the land vehicle battery pack when the land vehicle battery pack meets a charging condition, so as to output the charging voltage to the land vehicle battery pack through the fast charging circuit.

4. The DC charging high voltage circuit of claim 3, wherein, The split switch circuit comprises: A split relay is connected in series between the high-voltage connector and the fast charging circuit, and the split relay is connected with the first control circuit; The first control circuit is specifically configured to control the split relay to be turned on or turned off, so as to connect or disconnect the high-voltage connector with the fast charging circuit.

5. The DC charging high voltage circuit of claim 3, wherein, The fast charging circuit comprises: The fast charging relay has an input end connected with the charging pile, an output end connected with the split switch circuit, and is connected with the first control circuit; The fast charging interface is connected in series between the charging pile and the fast charging relay, and is configured to establish a connection relationship between the charging pile and the fast charging relay. The first control circuit is specifically configured to control the fast charging relay to be turned on when the second control circuit meets the charging parameter requirement.

6. The DC charging high voltage circuit of claim 3, wherein, The land power supply module further comprises a first switch circuit and a second switch circuit. The first switch circuit is connected in series between the split switch circuit and the positive electrode of the land vehicle battery pack, and the second switch circuit is connected in series between the negative electrode of the land vehicle battery pack and the high-voltage plug connector; the first control circuit is connected with the first switch circuit and the second switch circuit respectively. The first control circuit is specifically configured to control the first switch circuit and the second switch circuit to be disconnected when receiving the charging request sent by the second control circuit, and to control the split switch circuit to be turned on when confirming that the first switch circuit is disconnected.

7. The DC charging high voltage circuit of claim 6, wherein, The first control circuit is further configured to detect the front-end voltage and the rear-end voltage of the first switch circuit, and to confirm that the first switch circuit is disconnected when the difference between the front-end voltage and the rear-end voltage is greater than a first preset voltage.

8. The DC charging high voltage circuit of claim 6, wherein, The land power supply module further comprises: A pre-charging switch circuit, a first end of the pre-charging switch circuit being connected with a first end of the first switch circuit, and a second end of the pre-charging switch circuit being connected with a second end of the first switch circuit; The first control circuit is specifically configured to control the second switch circuit and the pre-charging switch circuit to be turned on to pre-charge the land vehicle battery pack when controlling the split switch circuit to be disconnected, and to turn on the first switch circuit and disconnect the pre-charging switch circuit when confirming that the land vehicle battery pack meets the pre-charging condition.

9. The DC charging high voltage circuit of claim 8, wherein, The first control circuit is further configured to detect the front-end voltage and the rear-end voltage of the first switch circuit, and to confirm that the land vehicle battery pack is pre-charged successfully when the front-end voltage and the rear-end voltage meet the pre-charging condition.

10. A DC charging high voltage circuit according to any one of claims 1-9, characterized in that, 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 circuit to be disconnected when the temperature exceeds a second preset temperature.

11. A land vehicle, characterized by The direct-current charging high-voltage circuit comprises the land power supply module.

12. A land-air split type air mobile, characterized by, The land vehicle and the aircraft comprise the land power supply module.

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