Ground maintenance and support system

Abstract

A ground maintenance and support system. The ground maintenance and support system comprises: a movable vehicle (900), wherein a device cavity (110) is defined inside the movable vehicle (900), and the movable vehicle (900) further comprises a charging interface (111), a fluid connector (112) and an air connector (113); an external charging module (400), which is connected to the charging interface (111); a refrigerant circuit (200); an off-body air delivery pipe (300), which is in communication with the air connector (113) and is configured to deliver air into a vehicle when the air interface (113) is connected to the vehicle; and a thermal management module (500), which is in communication with the device cavity (110) to form a device heat exchange branch (501), wherein an insulating heat exchange fluid (503) of the thermal management module (500) flows in the device heat exchange branch (501) and fills the device cavity (110), and the thermal management module (500) is in communication with the fluid connector (112) and is in communication with a battery cavity (12A) of the vehicle to form a battery heat exchange branch (502), such that the insulating heat exchange fluid (503) flows in the battery heat exchange branch (502) and fills the battery cavity (12A).

Description

Ground maintenance system

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202411338524.1, filed on September 25, 2024, and Chinese Patent Application No. 202422348426.8, filed on September 25, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicle maintenance and support, in particular to a ground maintenance system. BACKGROUND

[0004] For new energy vehicles, eVTOL (Electric Vertical Takeoff and Landing), new energy ships and other vehicles powered by electricity, ground service equipment can be used to charge and perform battery thermal management before operation.

[0005] However, in the related art, during the process of the ground service equipment charging the battery pack of the vehicle and performing battery thermal management, the battery pack and the power devices of the charging module in the ground service equipment will generate a large amount of heat, thereby affecting the maintenance efficiency. SUMMARY

[0006] The main purpose of the present application is to provide a ground maintenance system, which aims to solve the technical problem of low efficiency of the ground service equipment in the process of charging the battery pack of the vehicle and performing battery thermal management in the related art.

[0007] To achieve the above-mentioned purpose, the present application provides a ground maintenance system, which comprises:

[0008] A movable carrier, a device cavity is defined in the movable carrier, and the movable carrier further comprises a charging interface, a fluid interface and an air interface;

[0009] An external charging module, the external charging module is arranged in the device cavity, and the external charging module is connected with the charging interface;

[0010] A cold and heat source module, the cold and heat source module is arranged in the movable carrier, and the cold and heat source module defines a refrigerant circuit;

[0011] An off-board air delivery pipeline is provided on the movable carrier and is in communication with the air interface, for delivering air into the vehicle when the air interface is connected to the vehicle; wherein the refrigerant in the refrigerant circuit exchanges heat with the air in the off-board air delivery pipeline; and

[0012] A thermal management module is provided on the movable carrier, the thermal management module is in communication with the device cavity to form a device heat exchange branch, so that the insulation heat exchange fluid of the thermal management module flows in the device heat exchange branch and fills into the device cavity, and the thermal management module is in communication with the fluid interface, for forming a battery heat exchange branch in communication with the battery cavity of the vehicle when the fluid interface is connected to the vehicle, so that the insulation heat exchange fluid flows in the battery heat exchange branch and fills into the battery cavity; wherein the refrigerant also exchanges heat with the insulation heat exchange fluid;

[0013] An energy storage module is provided on the movable carrier, and the cold and heat source module, the external charging module and the thermal management module are connected to the energy storage module.

[0014] In addition, in order to achieve the above-mentioned purpose, the application further provides a ground maintenance system, wherein the ground maintenance system comprises:

[0015] A machine body, which defines a device cavity therein, and further comprises a charging interface, a fluid interface and an air interface;

[0016] An external charging module is provided in the device cavity, and the external charging module is connected to the charging interface;

[0017] A cold and heat source module is provided in the machine body, and the cold and heat source module defines a refrigerant circuit;

[0018] An off-board air delivery pipeline is provided on the machine body and is in communication with the air interface, and the off-board air delivery pipeline is configured to deliver air into the vehicle when the air interface is connected to the vehicle; wherein the refrigerant in the refrigerant circuit exchanges heat with the air in the off-board air delivery pipeline; and

[0019] A thermal management module is provided on the machine body, the thermal management module is in communication with the device cavity to form a device heat exchange branch, and the insulation heat exchange fluid of the thermal management module flows in the device heat exchange branch and fills into the device cavity, and the thermal management module is in communication with the fluid interface, and when the fluid interface is connected to the vehicle, the thermal management module is in communication with the battery cavity of the vehicle to form a battery heat exchange branch, and the insulation heat exchange fluid flows in the battery heat exchange branch and fills into the battery cavity; wherein the refrigerant also exchanges heat with the insulation heat exchange fluid.

[0020] The heat management module in the technical solution of the present application not only communicates with the device cavity in which the charging power device is installed to form a device heat exchange branch, but also can communicate with the battery cavity in the vehicle to form a battery heat exchange branch, so that during charging of the vehicle, the charging power device in the device cavity is immersed and cooled by the insulating heat exchange fluid, and the battery cells in the battery pack can also be immersed and cooled, thereby providing heat management function for the battery pack and the external charging module itself, supporting higher power charging, and further improving the fast charging speed.

[0021] In addition, the ground maintenance system separately arranged from the vehicle includes a refrigerant circuit, an off-body air delivery pipeline and a heat management module in addition to the external charging module, wherein the refrigerant circuit not only exchanges heat with the air of the off-body air delivery pipeline, but also exchanges heat with the insulating heat exchange fluid of the heat management module. In this way, during maintenance of the vehicle, the ground maintenance system has the functions of charging, cabin environmental control and battery heat management, so as to pre-adjust the temperature of the immersed battery module in the vehicle during the charging process of the vehicle, thereby improving the charging efficiency, and the cabin temperature is adjusted in advance by the air conditioner air reaching the expected temperature, thereby reducing the energy consumption during operation of the vehicle and improving the energy utilization efficiency and system integration of the ground maintenance system.

[0022] In addition, the electric energy driving module for driving the movable carrier to move and the external charging module for charging the battery pack of the vehicle are connected with the energy storage module, so that the electric energy used by the two is provided by the energy storage module, thereby reducing the cost of the ground maintenance system. The detachable battery in the energy storage module is consistent with the specification of the battery pack of the vehicle, and when the battery pack of the vehicle needs to be replaced, the detachable battery on the ground maintenance system can be directly replaced as a spare part to the vehicle.

[0023] The above is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of protection of the claims. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. The drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings from the structures shown in the drawings without creating any creative labor.

[0025] Fig. 1 is a schematic diagram of the connection between the ground maintenance system provided by the present application and the eVTOL;

[0026] Fig. 2 is a schematic diagram of the refrigerant circuit of the ground maintenance system provided by the present application;

[0027] Figure 3 is a schematic diagram of the flow of the insulation heat exchange fluid in the heat management module of an embodiment of the ground maintenance system provided by the present application;

[0028] Figure 4 is a schematic diagram of the flow of the insulation heat exchange fluid in the heat management module of another embodiment of the ground maintenance system provided by the present application;

[0029] Figure 5 is a schematic diagram of the circuit of another embodiment of the ground maintenance system provided by the present application;

[0030] Figure 6 is a schematic diagram of the heat management module of another embodiment of the ground maintenance system provided by the present application; wherein the device heat exchange branch and the battery heat exchange branch are connected in series;

[0031] Figure 7 is a schematic diagram of the circuit of yet another embodiment of the ground maintenance system provided by the present application;

[0032] Figure 8 is a schematic diagram of the device heat exchange branch and the battery heat exchange branch connected in series and parallel in the ground maintenance system provided by the present application;

[0033] Figure 9 is a schematic diagram of the connection between the charging gun and the charging socket in the ground maintenance system provided by the present application;

[0034] Figure 10 is a schematic diagram of the end surface of the charging gun head in the ground maintenance system provided by the present application;

[0035] Figure 11 is a schematic diagram of the cross section of the charging gun cable in the ground maintenance system provided by the present application;

[0036] Figure 12 is a schematic diagram of the connection between the energy storage module and the rest of the functional modules in the ground maintenance system provided by the present application;

[0037] Figure 13 is a schematic diagram of the carrier of the ground maintenance system provided by the present application; wherein the movable carrier is a ground service vehicle.

[0038] Explanation of reference numerals: 10, eVTOL; 12, submerged battery module; 12A, battery cavity; 122, battery cell; 17, charging socket; 100, airframe; 110, device cavity; 1111, first device hole; 1112, second device hole; 111, charging interface; 112, fluid interface; 113, air interface; 20, cold and heat source module; 200, refrigerant circuit; 200a, main pipe; 200b, first refrigerant branch; 200c, second refrigerant branch; 201, first heat exchanger; 202, compressor; 203, air heat exchanger; 204, fluid heat exchanger; 204a, first fluid heat exchanger; 204b, second fluid heat exchanger; 205, second fan; 207, first throttling assembly; 208, second throttling assembly; 209, first PTC heater; 2041, medium pump-out pipe; 300, off-body air delivery pipe; 310, first fan; 320, air purification assembly; 400, external charging module; 410, charging power device; 500, thermal management module; 501, device heat exchange branch; 502, battery heat exchange branch; 503, insulating heat exchange fluid; 504, first tee; 505, second tee; 500a, first thermal management sub-module; 500b, second thermal management sub-module; 50, main pipe; 510, medium storage tank; 511, medium return pipe; 520, pump; 510a, first sub-medium storage tank; 520a, first sub-pump; 510b, second sub-medium storage tank; 520b, second sub-pump; 530, air charging and liquid draining assembly; 531, air storage device; 532, air pipe valve; 60, charging gun; 610, charging gun head; 620, charging gun cable; 621, wire core; 622, protective layer; 623, cable phase change module; 6231, first sub-phase change filling body; 6233, fluid pipe; 700, energy storage module; 800, electric energy driving module; 900, movable carrier.

[0039] 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

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] It should be noted that if the application embodiments involve directionality indication (such as up, down, left, right, front, back, …), the directionality indication is only used to explain the relative position relationship, motion condition, etc. between the components in a certain posture, and if the certain posture changes, the directionality indication will also change accordingly.

[0042] In addition, if the application embodiments involve descriptions such as "first", "second", etc., the "first", "second", etc. descriptions are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, "and / or" or "and / or" appears throughout the text, which means that the three parallel schemes include "A and / or B", which includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel 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, nor within the protection scope claimed by the present application.

[0043] With the popularization of new energy vehicles, eVTOL, new energy ships and other electric vehicles powered by batteries, charging equipment such as charging piles has an increasingly important role and increasingly high indicators as a battery charging device. Electric vehicles will face the challenge of generating a large amount of heat during rapid charging of battery packs during the charging process, so battery thermal management is needed during charging. That is, before the electric vehicle is running, it can be charged, battery thermal management, and other maintenance and support operations by ground service equipment.

[0044] During the rapid charging and battery thermal management of the battery pack of the ground service equipment to the vehicle, the battery pack and the power devices of the charging module itself in the ground service equipment will generate a large amount of heat, thereby affecting the maintenance efficiency.

[0045] Therefore, how to dissipate heat from the battery pack and the power devices of the charging module itself during the charging process by the ground service equipment has become a technical problem that needs to be solved by those skilled in the art.

[0046] Therefore, the present application provides a ground maintenance system, which is described in detail below in conjunction with some specific embodiments.

[0047] Referring to FIG. 1 and FIG. 2, the application proposes a ground maintenance system. The ground maintenance system is provided separately from the vehicle and is used for maintaining the vehicle. It should be noted that the vehicle includes but is not limited to new energy vehicles, eVTOLs, new energy ships, etc., and the following is described by taking the eVTOL 10 as an example.

[0048] It can be understood that the eVTOL 10 has a battery pack. The battery pack can provide power to the power unit of the eVTOL 10, or can also provide power to the on-board environmental control system and the on-board lighting system and other on-board systems. The battery pack includes a module shell having a battery cavity 12A and a battery cell 122 installed in the battery cavity 12A. The module shell has a first battery cavity hole and a second battery cavity hole in communication with the battery cavity 12A, wherein the first battery cavity hole is for the flow of the insulating heat exchange fluid 503, and the second battery cavity hole is for the flow of the insulating heat exchange fluid 503. And the first battery cavity hole and the second battery cavity hole are both arranged on the upper part of the top wall or the side wall of the module shell. In addition, the module shell is a shell structure with a sealing design, so that the battery cavity 12A inside can be used to fill the insulating heat exchange fluid 503. When the battery cavity 12A is filled with the insulating heat exchange fluid 503, the insulating heat exchange fluid 503 can completely immerse the battery cell 122, thereby contacting the battery cell 122 for heat exchange to transfer the heat of the battery cell 122 to the module shell, and the heat exchange between the module shell and the external environment is beneficial to improve the heat dissipation efficiency of the battery cell 122. It can be understood that the structure of the battery cell 122 has many forms, such as one or more of soft-pack battery cell, square battery cell and cylindrical battery cell. In addition, the battery cavity 12A can be a single battery cavity, or can also be a communication chamber formed by connecting multiple battery cavities through pipelines.

[0049] In addition, the eVTOL 10 also has a machine end interface, which includes a machine end medium inlet hole in communication with the first battery cavity hole, and a machine end medium outlet hole in communication with the second battery cavity hole. Of course, the machine end interface can be integrated into the charging socket 17 on the eVTOL 10 matched with the charging gun, thereby avoiding a substantial increase in the weight of the eVTOL, and avoiding wasting the space of the fuselage of the eVTOL.

[0050] In a possible implementation, the battery cavity 12A can also be used to fill the non-combustible gas, and when the battery cavity 12A is filled with the non-combustible gas, the battery cell 122 contacts the non-combustible gas. In this way, the contact area of the battery cell 122 with oxygen is reduced. When the battery pack is in thermal runaway, the non-combustible gas can suppress the combustion of the battery pack. It is worth mentioning that because the non-combustible gas is filled, the water vapor in the battery cavity 12A is reduced, so that the occurrence of condensate water in the battery cavity 12A is reduced, thereby avoiding the insulation failure of the battery pack.

[0051] In a possible implementation, the phase change module is further arranged in the battery cavity 12A, and the battery cell 122 can directly exchange heat with the phase change module, so that the heat dissipation efficiency of the battery cell 122 is improved. For example, a phase change module is arranged between two adjacent battery cells 122, so that the heat between the two adjacent battery cells 122 can be dissipated through the phase change module, and the heat accumulation between the two adjacent battery cells 122 is avoided, and the heat dissipation efficiency of the battery pack is improved.

[0052] In this embodiment, the ground maintenance system includes a machine body 100, an external charging module 400, a cold and heat source module 20, an off-body air conveying pipeline 300, and a thermal management module 500.

[0053] The machine body 100 defines a device cavity 110, and the machine body 100 further includes a charging interface 111, a fluid interface 112, and an air interface 113. The external charging module 400 is arranged in the device cavity 110 and connected with the charging interface 111. The cold and heat source module 20 is arranged in the machine body 100 and defines a refrigerant circuit 200. The off-body air conveying pipeline 300 is arranged in the machine body 100 and communicates with the air interface 113. The off-body air conveying pipeline is configured to convey air into a vehicle when the air interface 113 is connected with the vehicle. The refrigerant in the refrigerant circuit 200 exchanges heat with the air in the off-body air conveying pipeline 300. The thermal management module 500 is arranged in the machine body 100 and communicates with the device cavity 110 to form a device heat exchange branch 501. An insulating heat exchange fluid 503 in the thermal management module 500 flows in the device heat exchange branch 501 and fills the device cavity 110. The thermal management module 500 communicates with the fluid interface 112. When the fluid interface 112 is connected with the vehicle, the thermal management module 500 communicates with a battery cavity 12A of the vehicle to form a battery heat exchange branch 502. The insulating heat exchange fluid 503 flows in the battery heat exchange branch 502 and fills the battery cavity 12A. The refrigerant further exchanges heat with the insulating heat exchange fluid 503.

[0054] Specifically, the machine body 100 is a structural bearing part or a structural frame part of the ground maintenance system, and the remaining components of the ground maintenance system are borne or assembled in the machine body 100. The cold and heat source module 20 is arranged in the machine body 100 and is configured to generate or regulate refrigerant. The refrigerant circuit 200 for conveying the refrigerant is further defined in the cold and heat source module 20. The refrigerant flows in the refrigerant circuit 200 and is conveyed to a designed heat exchange space to exchange heat with corresponding substances, such as air or the insulating heat exchange fluid 503. Specifically, the refrigerant circuit 200 includes a compressor 202, a first heat exchanger 201, and at least one second heat exchanger.

[0055] As an option of the embodiment, the number of the second heat exchanger is one. And the one second heat exchanger is also connected in the off-body air delivery pipeline 300 and the thermal management module 500. Thus, when the refrigerant circuit 200 operates in the heating mode, the liquid refrigerant in the refrigerant circuit 200 is evaporated into gas at the first heat exchanger 201 (used as an evaporator) and absorbs the heat in the ambient air of the environment where the ground maintenance system is located, and then is compressed into high-temperature and high-pressure gas by the compressor 202. The high-temperature and high-pressure gas enters the second heat exchanger, a part of the high-temperature and high-pressure gas exchanges heat with the air in the off-body air delivery pipeline 300 to condense into low-temperature and high-pressure liquid, and another part of the high-temperature and high-pressure gas exchanges heat with the insulation heat exchange fluid 503 in the thermal management module 500 to condense into low-temperature and high-pressure gas. A large amount of heat is released in the process of condensing the high-temperature and high-pressure gas into low-temperature and high-pressure gas.

[0056] When the refrigerant circuit 200 operates in the cooling mode, the low-temperature and low-pressure gaseous refrigerant in the refrigerant circuit 200 is sucked into the compressor 202, which compresses it into high-temperature and high-pressure gas. The high-temperature and high-pressure gas enters the first heat exchanger 201 (used as a condenser) and is cooled and condensed into high-pressure liquid refrigerant, releasing a large amount of heat. These heat is dissipated to the ambient air of the environment where the ground maintenance system is located. After passing through the throttling assembly, the pressure and temperature of the high-pressure liquid refrigerant are reduced, becoming low-temperature and low-pressure gaseous-liquid mixture refrigerant. The low-temperature and low-pressure refrigerant enters the second heat exchanger and exchanges heat with the air in the off-body air delivery pipeline 300 or with the insulation heat exchange fluid 503 in the thermal management module 500 to evaporate into gas, thereby reducing the temperature of the air in the off-body air delivery pipeline 300 and the insulation heat exchange fluid 503 in the thermal management module 500. The evaporated gaseous refrigerant is again sucked into the compressor 202 to start the next cycle.

[0057] Alternatively, as another option of the embodiment, referring to FIG. 1 and FIG. 2, the refrigerant circuit 200 includes a main pipeline 200a, a first refrigerant branch 200b and a second refrigerant branch 200c connected to the main pipeline 200a. The main pipeline 200a includes the compressor 202 and the first heat exchanger 201, and the first refrigerant branch 200b and the second refrigerant branch 200c are connected in parallel and then in series to the main pipeline 200a. The refrigerant in the first refrigerant branch 200b exchanges heat with the air in the off-body air delivery pipeline 300, and the refrigerant in the second refrigerant branch 200c exchanges heat with the insulation heat exchange fluid 503.

[0058] Thus, when the refrigerant circuit 200 operates in the heating mode, the liquid refrigerant in the refrigerant circuit 200 is evaporated into gas at the first heat exchanger 201 (used as an evaporator) and absorbs heat from the ambient air of the environment where the ground maintenance system is located, and then is compressed into high-temperature and high-pressure gas by the compressor 202 in the main pipeline 200a, and the high-temperature and high-pressure gas is divided into two paths and enters the first refrigerant branch 200b and the second refrigerant branch 200c, respectively. In the first refrigerant branch 200b and the second refrigerant branch 200c, the high-temperature and high-pressure gas exchanges heat with the air of the off-body air delivery pipeline 300 and is condensed into low-temperature and high-pressure liquid, or exchanges heat with the insulation heat exchange fluid 503 in the thermal management module 500 and is condensed into low-temperature and high-pressure gas. A large amount of heat is released during the condensation of the high-temperature and high-pressure gas into the low-temperature and high-pressure gas.

[0059] When the refrigerant circuit 200 operates in the cooling mode, the low-temperature and low-pressure gaseous refrigerant in the refrigerant circuit 200 is sucked into the compressor 202, which compresses it into high-temperature and high-pressure gas. The high-temperature and high-pressure gas enters the first heat exchanger 201 (used as a condenser) and is condensed into high-pressure liquid refrigerant, and a large amount of heat is released. These heat is dissipated to the ambient air of the environment where the ground maintenance system is located. After passing through the throttling assembly, the pressure and temperature of the high-pressure liquid refrigerant are reduced, and it becomes a low-temperature and low-pressure gas-liquid mixture. The low-temperature and low-pressure refrigerant is divided into two paths and enters the first refrigerant branch 200b and the second refrigerant branch 200c, respectively, and exchanges heat with the air of the off-body air delivery pipeline 300 or with the insulation heat exchange fluid 503 in the thermal management module 500 to be evaporated into gas, thereby reducing the temperature of the air in the off-body air delivery pipeline 300 and the insulation heat exchange fluid 503 in the thermal management module 500. The gaseous refrigerant after evaporation is sucked into the compressor 202 again to start the next cycle.

[0060] In the above two options, when the refrigerant circuit 200 only includes one second heat exchanger, the circuit structure is simpler. When the refrigerant circuit 200 includes the first refrigerant branch 200b and the second refrigerant branch 200c in parallel, it can ensure that the heat exchange between the air conditioner outlet air and the refrigerant, and the heat exchange between the insulation heat exchange fluid 503 and the refrigerant do not interfere with each other, thereby ensuring that the air conditioner outlet air and the insulation heat exchange fluid 503 at the ideal temperature are prepared.

[0061] Of course, the refrigerant circuit 200 can be a single cold refrigerant circuit, a single hot refrigerant circuit, or a heat pump system, thereby having both cooling and heating modes, which is not limited by the present embodiment.

[0062] The off-board air delivery pipeline 300 is a wind pipe assembly that is off-board the eVTOL 10 and has an inlet and an outlet. The inlet can be in communication with the ambient air of the environment where the ground maintenance system is located, so that fresh air can be drawn in. In one embodiment, referring to FIG. 1, the ground maintenance system further includes a first fan 310 that is disposed at the inlet of the off-board air delivery pipeline 300. The first fan 310 continuously draws in a large amount of fresh air by rotating for the needs of the cabin of the eVTOL 10.

[0063] As the second heat exchanger exchanges heat with the air in the off-board air delivery pipeline 300, the air flowing in the off-board air delivery pipeline 300 is heated or cooled by the coolant flowing in the second heat exchanger, so as to form the air conditioning outlet air. The off-board air delivery pipeline 300 is detachably connected to the vehicle, that is, when the eVTOL 10 is ready for takeoff, the outlet of the off-board air delivery pipeline 300 is separated from the eVTOL 10. When the eVTOL 10 enters the ground maintenance stage or the pre-takeoff maintenance stage after landing, the outlet of the off-board air delivery pipeline 300 is connected to the eVTOL 10. Thus, when the eVTOL 10 enters the ground maintenance stage or the pre-takeoff maintenance stage after landing, the off-board air delivery pipeline 300 continuously delivers the air conditioning outlet air to the eVTOL 10, so as to adjust the temperature in the eVTOL to a set temperature.

[0064] As the second heat exchanger exchanges heat with the insulation heat exchange fluid 503 in the thermal management module 500. The insulation heat exchange fluid 503 is heated or cooled by the coolant flowing in the second heat exchanger, so as to change its temperature.

[0065] The body 100 has a device cavity 110 for mounting an external charging module 400 that provides charging services. It can be understood that the external charging module 400 includes but is not limited to a fast charging circuit and / or a slow charging circuit, and a charging control circuit that controls the fast charging circuit and / or the slow charging circuit to provide charging services. The fast charging circuit is used to provide fast charging services, and the slow charging circuit is used to provide ordinary charging services.

[0066] The external charging module 400 is composed of various charging power devices 410, including but not limited to DC-DC converters, AC-DC converters, batteries, capacitors, inductors, induction coils, rectifier bridges, high-voltage buses, switching tubes, fuse protectors, diodes, and various cables. It can be understood that when all the charging power devices 410 of the external charging module 400 are integrated into one chamber, the device chamber 110 can be one chamber. Alternatively, when all the charging power devices 410 of the external charging module 400 are distributed in multiple chambers, the device chamber 110 can also be a communication body composed of multiple chambers connected by pipelines, which is not limited in the present embodiment. It is worth mentioning that the device chamber 110 is a chamber with a sealed design, so as to separate the environment inside the device chamber 110 from the environment outside the device chamber 110, so as to avoid leakage of the insulation heat exchange fluid 503 flowing in the device chamber 110. In addition, the chamber structure with a sealed design of the device chamber 110 can also make the insulation heat exchange fluid 503 completely fill the device chamber 110 and completely immerse all the charging power devices 410. The device chamber 110 can be filled with insulation heat exchange fluid 503, and the insulation heat exchange fluid 503 can also immerse all the charging power devices 410. The insulation heat exchange fluid 503 exchanges heat with each charging power device 410 in the device chamber 110 to cool each charging power device 410. Referring to FIG. 4, it can be understood that the machine body 100 has a first device hole 1111 and a second device hole 1112 in communication with the device chamber 110, the first device hole 1111 is for the insulation heat exchange fluid 503 to flow in, and the second device hole 1112 is for the insulation heat exchange fluid 503 to flow out. Of course, in order to make the insulation heat exchange fluid 503 completely immerse the charging power devices 410, the first device hole 1111 and the second device hole 1112 are also arranged on the upper part of the top wall or the side wall of the device chamber 110. In addition, the machine body 100 can be provided with corresponding flow channels or flow guide structures to ensure that the insulation heat exchange fluid 503 circulates to each charging power device 410 and ensures the immersion effect.

[0067] The thermal management module 500 is used to provide thermal management functions for the ground maintenance system itself and the battery pack of the eVTOL during charging. Specifically, the thermal management module 500 is used to provide insulation heat exchange fluid 503 and has heat exchange components for driving the insulation heat exchange fluid 503 to flow in the battery heat exchange branch 502 and the device heat exchange branch 501. The insulation heat exchange fluid 503 can be a cooling liquid, which can carry away the heat generated by the heating battery cells 122 and charging power devices 410 during flow. Since the heat of the ground maintenance system itself comes from the heating of the charging power devices 410 during charging, and since the heat of the battery pack comes from the heating of the battery cells 122, the present embodiment provides immersion cooling for both the charging power devices 410 in the device chamber 110 and the battery cells 122 of the battery pack to improve the thermal management efficiency.

[0068] Specifically, referring to FIG. 3, the thermal management module 500 is in communication with the device cavity 110, thereby forming a device heat exchange branch 501. At this time, the cooled insulation heat exchange fluid 503 enters the device cavity 110 through the first device hole 1111 and directly contacts each charging power device 410 in the device cavity 110, thereby taking away the heat generated by the charging power device 410 and being heated. The heated insulation heat exchange fluid 503 exits the device cavity 110 through the second device hole 1112 and continues to move along the device heat exchange branch 501, thereby taking away the heat from the device cavity 110. Moreover, when the machine body is connected to the eVTOL 10 through the fluid interface 112, the thermal management module 500 is also in communication with the battery cavity 12A on the eVTOL 10, thereby forming a battery heat exchange branch 502, so as to flow the insulation heat exchange fluid 503 in the battery heat exchange branch 502. When the insulation heat exchange fluid 503 enters the battery cavity 12A through the first battery cavity hole, it can directly contact the battery cell 122 in the battery cavity 12A, thereby performing thermal management on the battery cell 122, and then flows out along the second battery cavity hole.

[0069] The insulation heat exchange fluid 503 is a cooling liquid that is insulation and has no flash point. It should be noted that in an embodiment, the insulation heat exchange fluid 503 is deionized water, electronic fluorinated liquid, hydrocarbon, ester or silicone oil. In this way, the insulation heat exchange fluid 503 has the characteristics of high insulation, high specific heat capacity, high thermal conductivity, non-combustion, no flash point, non-toxic and low chemical activity. In addition, even if the insulation heat exchange fluid 503 in the embodiment leaks, it can also avoid safety problems. Alternatively, in an embodiment, the electronic fluorinated liquid is configured as hydrofluoroether or hydrofluoroalkene. Alternatively, in an embodiment, the hydrocarbon is configured as mineral oil or synthetic hydrocarbon oil, such as transformer oil. Alternatively, in an embodiment, the lipid is configured as triglyceride or synthetic ester. Alternatively, in an embodiment, the silicone oil is configured as dimethyl silicone oil.

[0070] It is worth mentioning that the insulating heat exchange fluid 503 in the battery pack can also be input into the battery pack by the thermal management module 500 only when the eVTOL 10 is being charged, so that the insulating heat exchange fluid 503 is in direct contact with the battery cells 122 in the battery pack for heat exchange, thereby changing the temperature of the battery pack. Alternatively, in a feasible embodiment, the battery pack is also filled with a battery heat exchange medium, thereby forming an immersion cooling battery pack, i.e., an immersion battery module 12. In this way, the eVTOL 10 cools the battery cells 122 in the immersion battery module 12 through the battery heat exchange medium during flight. The material of the battery heat exchange medium is consistent with that of the insulating heat exchange fluid 503, so that the ground maintenance system provided by the present embodiment can be compatible with the immersion battery module 12, i.e., when the thermal management module 500 is in communication with the battery cavity 12A, the insulating heat exchange fluid 503 and the battery heat exchange medium can be directly mixed and used without the need to first empty the battery heat exchange medium in the battery cavity 12A and then input the insulating heat exchange fluid 503, thereby improving the convenience of maintenance and reducing the difficulty of maintenance.

[0071] For example, during the landing of the eVTOL 10, the power of the eVTOL 10 is large, the heat generation of the immersion battery module 12 is large, and the immersion battery module 12 is in a high temperature state, for example, the temperature of the immersion battery module 12 is greater than 40°C. Therefore, after landing, the immersion battery module 12 cannot be immediately charged to avoid over-temperature of the battery cells 122. At this time, the temperature of the immersion battery module 12 can be adjusted by using the refrigerated insulating heat exchange fluid 503 as a cooling liquid to reduce the temperature of the battery cells 122, for example, to reduce the temperature to between 25°C and 30°C, so that the battery cells 122 have high electrochemical activity. Then the immersion battery module 12 is charged. As can be seen, under the adjustment of the thermal management module 500, the maintenance time of the eVTOL on the ground is shortened, and the operation efficiency of the eVTOL is improved. Alternatively, when the ambient temperature is low, for example, the ambient temperature is less than 15°C, the temperature of the immersion battery module 12 can be increased by the thermal management module 500 to warm up the battery cells 122, for example, to increase the temperature of the immersion battery module 12 to a suitable working temperature interval, so that the battery cells 122 have high electrochemical activity. Therefore, the eVTOL 10 is charged when the temperature of the immersion battery module 12 is high. In this way, the loss of the power of the eVTOL 10 itself is reduced, and the environmental adaptation range of the eVTOL 10 is increased.

[0072] Alternatively, based on the eVTOL 10 having the submerged battery module 12, in another embodiment, the on-board air conditioning loop of the on-board environmental control system includes a battery heat exchanger and an in-cabin heat exchanger connected by a pipeline to form a circulation loop, the battery heat exchanger is arranged in the battery cavity 12A and is in heat exchange connection with the phase change medium. The phase change medium is used to absorb and store the heat generated in the cabin, or to transfer the stored heat to the refrigerant of the on-board air conditioning loop. That is, in this embodiment, the outdoor heat exchanger of the on-board air conditioning loop is cancelled and integrated into the battery pack of the eVTOL 10 to form a battery heat exchanger. The battery heat exchanger is arranged in the phase change medium to be in heat exchange connection with the phase change medium, so as to realize heat exchange between the refrigerant in the battery heat exchanger and the phase change medium. Of course, the on-board air conditioning loop of the on-board environmental control system can also not be coupled with the battery pack, and still use the outdoor heat exchanger to exchange heat with the outdoor air.

[0073] It can be understood that, in order to achieve the purpose of storing the heat transferred out of the cabin by the phase change medium, or transferring the heat stored in advance to the refrigerant, the phase change medium in the battery pack may need to be prepared on the ground in advance when the eVTOL 10 performs different tasks, that is, the operating mode and / or set temperature of the on-board air conditioning loop are determined through the flight task, then the phase state of the phase change medium is determined, and then the temperature of the insulating heat exchange fluid 503 is determined, and after the insulating heat exchange fluid 503 is introduced into the submerged battery module 12, the phase change medium is heated to store heat. Alternatively, the insulating heat exchange fluid 503 cools the phase change medium in the battery pack, so that the phase state of the phase change medium meets the requirements of the task.

[0074] As can be seen, the embodiment provides a ground maintenance system, which can control the temperature of the battery pack of the vehicle while also controlling the temperature of the external charging module 400, and can also provide air conditioning air to the eVTOL 10 and other vehicles. Among them, while controlling the temperature of the battery pack of the vehicle, the external charging module 400 can also be controlled, so that during the charging of the vehicle, the charging power device 410 in the device cavity 110 is immersed and cooled by the insulating heat exchange fluid 503, and the battery cells 122 in the battery pack can also be immersed and cooled, thereby providing heat management functions for the battery pack and the external charging module 400 itself, to support higher power charging, thereby further improving the fast charging speed.

[0075] It is easy to understand that, unlike the cabin air conditioning of traditional civil aviation passenger aircraft or helicopters, which uses air circulation refrigeration principle for refrigeration, uses air after refrigeration and dehumidification to mix with compressor air introduced from the engine to achieve temperature adjustment and dehumidification. The eVTOL 10 does not have compressor air for cabin air conditioning. According to the design requirements of refrigeration capacity and air volume demand, the compressor and heating equipment are increased to meet the regulation of cabin environment temperature. Obviously, the greater the refrigeration capacity, the greater the weight of the corresponding equipment, and the weight of the eVTOL 10 is extremely important and critical. Therefore, it is urgent to improve the comfort of passengers by quickly adjusting the temperature of the cabin air conditioning without increasing the weight and power consumption of the eVTOL 10. In addition, the ground maintenance and function recovery of the eVTOL 10 before takeoff is an important part of its operation process. How to efficiently, safely and energy-efficiently complete the ground preparation of the eVTOL during daily operation has become a key indicator under the demand of high-frequency operation in the future. Specifically, the main requirements of the eVTOL in the ground preparation state include high-rate fast charging, rapid temperature adjustment of the battery and the cabin environment, thereby improving the efficiency of the eVTOL in flight, improving the riding experience of the passengers, and improving the safety of the battery operation in flight. For this purpose, in combination with the ground maintenance requirements of the eVTOL 10 during operation, the temperature in the cabin of the eVTOL 10 and the like can be quickly adjusted to the target temperature matching the flight task during the process of quickly charging the eVTOL 10 and the like, thereby improving the energy utilization efficiency and system integration of the ground maintenance system. In addition, during the waiting and passenger boarding stage of the eVTOL 10 during operation, the temperature in the cabin is controlled by the ground maintenance system, which improves the comfort of the passengers without increasing power consumption. It can be seen that the embodiment reduces the energy consumption of the vehicle during operation and improves the overall performance of the vehicle. At the same time, during the waiting process after the passengers board, the off-body air delivery pipeline 300 is used to continuously deliver air conditioning air for temperature regulation in the cabin, so that the temperature in the cabin reaches the passenger's suitable temperature in the shortest time, which can effectively reduce the passenger's demand for temperature after takeoff, and can reduce the use demand of the on-board air conditioning system during flight. Since the off-body air delivery pipeline 300 and the thermal management module 500 are separately provided from the eVTOL 10, the ground maintenance system can be quickly disassembled and assembled in the late stage of takeoff preparation, and the takeoff condition can be reached in the shortest time.

[0076] In addition, when the same eVTOL 10 continuously performs short-distance flight tasks, the cabin air usually has an odor after the previous flight task, which will bring an uncomfortable feeling to the passengers boarding the next flight. Therefore, the ground maintenance system provided in the embodiment can optionally provide fresh air on the ground to the cockpit and / or cabin through the ex vivo air delivery pipeline 300, thereby removing dust, odor, bacteria, viruses and other pollutants in the cabin air, keeping the cabin air clean, and effectively improving passenger comfort.

[0077] In addition, in an embodiment, the refrigerant circuit 200 further comprises a second fan 205 arranged at the first heat exchanger 201. When the refrigerant circuit 200 operates in the cooling mode, the second fan 205 generates wind by rotating to drive air circulation through the surface of the first heat exchanger 201, thereby removing heat from the air heat exchanger 203, ensuring that the first heat exchanger 201 can continuously and effectively exchange heat. When the refrigerant circuit 200 operates in the heating mode, the second fan 205 helps the refrigerant to exchange heat with the outside air more quickly by increasing the air flow rate, thereby improving the heating efficiency.

[0078] In an embodiment, the first refrigerant branch 200b further comprises a first electromagnetic valve (not shown), and / or the second refrigerant branch 200c further comprises a second electromagnetic valve (not shown).

[0079] Specifically, the first refrigerant branch 200b can be provided with a first electromagnetic valve, which can be switched between an open state and a closed state. When the first electromagnetic valve is in the closed state, the first refrigerant branch 200b is cut off, so that the first refrigerant branch 200b does not cool or heat the air in the ex vivo air delivery pipeline 300. The second refrigerant branch 200c can be provided with a second electromagnetic valve, which can also be switched between an open state and a closed state. When the second electromagnetic valve is in the closed state, the second refrigerant branch 200c is cut off, i.e. the second refrigerant branch 200c does not cool or heat the insulating heat transfer fluid 503 in the thermal management module 500. Of course, in the refrigerant circuit 200, only the first refrigerant branch 200b can include a first electromagnetic valve, only the second refrigerant branch 200c can include a second electromagnetic valve, or both the first refrigerant branch 200b and the second refrigerant branch 200c can include electromagnetic valves. The embodiment is not limited in this regard.

[0080] It should be noted that the introduction of air conditioning air and insulation heat transfer fluid 503 into the vehicle does not always need to be carried out together. For example, in the case of a continuous short-haul flight mission as described above, the eVTOL may not need to be charged each time. At this time, the vehicle only needs fresh air conditioning air, and the second electromagnetic valve is switched to the closed state. Then the second refrigerant branch 200c does not work, and only the first refrigerant branch 200b works, so that the off-body air delivery pipeline 300 continuously delivers air conditioning air to the eVTOL 10. Or when the eVTOL 10 only needs to be charged, the first electromagnetic valve is switched to the closed state, then the first refrigerant branch 200b does not work, and only the second refrigerant branch 200c works, so that the thermal management module 500 continuously delivers insulation heat transfer fluid 503 of a preset temperature to the eVTOL.

[0081] As can be seen, in the embodiment, by providing electromagnetic valves on the first refrigerant branch 200b and / or the second refrigerant branch 200c, the first refrigerant branch 200b and the second refrigerant branch 200c can be controlled to work independently or together by switching the state of the electromagnetic valve, so as to adapt to the needs of various working conditions and avoid unnecessary energy consumption caused by the common operation of the first refrigerant branch 200b and the second refrigerant branch 200c.

[0082] In an embodiment, the ground maintenance system further comprises an air purification assembly 320, which is arranged at the inlet of the off-body air delivery pipeline 300.

[0083] The air purification assembly 320 is arranged at the inlet of the off-body air delivery pipeline 300 to purify the air, so that qualified air can be introduced into the cabin of the eVTOL 10 to improve the user experience. In an example, the air purification assembly 320 can include one or more of a HEPA (High Efficiency Particulate Air Filter) filter, an activated carbon filter, a negative ion generator, and an ozone generator installed at the inlet of the off-body air delivery pipeline 300.

[0084] It should be noted that the first refrigerant branch 200b and the off-body air conveying pipeline 300 can be directly contacted to facilitate heat transfer between them, or the second refrigerant branch 200c and the thermal management module 500 are directly contacted to facilitate heat transfer between them. However, the heat transfer efficiency of direct pipeline contact is low, in order to improve the heat exchange efficiency, in an embodiment, the ground maintenance system further comprises: an air heat exchanger 203 and a fluid heat exchanger 204, the first side of the air heat exchanger 203 is connected in the first refrigerant branch 200b, the second side of the air heat exchanger 203 is connected in the off-body air conveying pipeline 300, and the air heat exchanger 203 is used for heat exchange between the refrigerant in the first refrigerant branch 200b and the air in the off-body air conveying pipeline 300; the first side of the fluid heat exchanger 204 is connected in the second refrigerant branch 200c, and the second side of the fluid heat exchanger 204 is connected in the thermal management module 500, and the fluid heat exchanger 204 is used for heat exchange between the refrigerant in the second refrigerant branch 200c and the insulation heat exchange fluid 503 in the thermal management module 500.

[0085] It should be noted that the air heat exchanger 203 and the fluid heat exchanger 204 are the second heat exchanger mentioned above, and at this time the second heat exchanger includes two. It is worth mentioning that the two can be constructed as a tubular heat exchanger, a plate heat exchanger or a direct heat exchanger, and the present embodiment does not limit this.

[0086] In the present embodiment, the first refrigerant branch 200b realizes heat exchange with the air in the off-body air conveying pipeline 300 through the air heat exchanger 203, and the second refrigerant branch 200c realizes heat exchange with the insulation heat exchange fluid 503 in the thermal management module 500 through the fluid heat exchanger 204. Therefore, in the present embodiment, the first heat exchanger 201, the air heat exchanger 203 and the fluid heat exchanger 204 form a heat pump air conditioning circuit, which can utilize the heat in the environment through the first heat exchanger 201 to realize efficient heating and cooling effect with relatively low energy consumption. In addition, the heat pump air conditioning circuit is suitable for different climate conditions, and can stably operate whether in cold winter or hot summer, so as to improve the environmental adaptability of the ground maintenance system, so as to cooperate with the popularization and use of the eVTOL 10 in various regions.

[0087] In the heat pump air conditioning circuit, since the first refrigerant branch 200b and the second refrigerant branch 200c can work together, only one throttling component can be arranged in the main pipeline 200a to reduce the system complexity of the refrigerant circuit 200. However, the control accuracy of a single throttling component is low, and since the entire refrigerant circuit 200 only has one throttling point, it is difficult to accurately adjust the refrigeration / heating requirements of the first refrigerant branch 200b and the second refrigerant branch 200c respectively.

[0088] Therefore, in an embodiment, the first refrigerant branch 200b further comprises a first throttling component 207, and the second refrigerant branch 200c further comprises a second throttling component 208. In this way, the first throttling component 207 can be independently adjusted according to the actual demand of the first refrigerant branch 200b, i.e. the cabin temperature regulation demand in the cabin of the eVTOL 10, and the second throttling component 208 can be independently adjusted according to the actual demand of the second refrigerant branch 200c, i.e. the temperature regulation demand of the battery cell 122 of the immersed battery module 12, so as to realize accurate control of each branch, thereby reducing unnecessary energy consumption of each branch and improving the overall energy efficiency of the refrigerant circuit 200. The first throttling component 207 and the second throttling component 208 can be a thermal expansion valve or an electronic expansion valve, etc.

[0089] In an embodiment, the air heat exchanger 203 is provided with a first PTC (Positive Temperature Coefficient) heater 209, and / or the fluid heat exchanger 204 is provided with a second PTC heater (not shown). In this embodiment, the air heat exchanger 203 and the fluid heat exchanger 204 can each additionally be provided with a PTC heater as an auxiliary electric heating element to improve the heating effect and efficiency of the refrigerant circuit 200. In addition, since the ground maintenance system is arranged separately from the eVTOL 10 and other vehicles, such as on the ground maintenance station or the ground service vehicle at the airport, it is greatly affected by the ambient temperature of the airport. At this time, the PTC heater can stably provide the required heat in the refrigerant circuit 200, i.e. provide air conditioner outlet air and insulation heat exchange fluid 503 with small temperature fluctuations, thereby improving the user experience in the cabin and also improving the maintenance efficiency of the immersed battery module 12. In addition, in a relatively cold area, the refrigerant circuit 200 starts relatively slowly, and the PTC heater can also quickly provide the air conditioner outlet air and / or insulation heat exchange fluid 503 after heating to avoid the cabin temperature not being raised for a long time after the user enters the passenger cabin, and also to avoid the battery not being charged for a long time.

[0090] Please refer to FIG. 4, in an embodiment, the thermal management module 500 can comprise a first thermal management sub-module 500a and a second thermal management sub-module 500b, the first thermal management sub-module 500a is in communication with the device heat exchange branch 501, and the second thermal management sub-module 500b is in communication with the battery heat exchange branch 502.

[0091] The first thermal management sub-module 500a and the second thermal management sub-module 500b each independently adjust the temperature of the insulation heat exchange fluid 503 in the corresponding branch. In this way, the battery heat exchange branch 502 and the device heat exchange branch 501 independently control the temperature of each other, without affecting each other, to improve safety and reduce the complexity of the temperature control program.

[0092] Please refer to FIG. 5, in a specific example, the fluid heat exchanger 204 includes two, i.e. a first fluid heat exchanger 204a and a second fluid heat exchanger 204b. The first thermal management sub-module 500a includes a first sub-medium storage tank 510a and a first sub-pump 520a. Wherein, one end of the first sub-medium storage tank 510a is in communication with the device cavity 110, the other end is in communication with one end of the first sub-pump 520a, the other end of the first sub-pump 520a is in communication with a first side of the first fluid heat exchanger 204a, and a second side of the first fluid heat exchanger 204a is in communication with the device cavity 110 to form a circulation loop.

[0093] The second thermal management sub-module 500b includes a second sub-medium storage tank 510b and a second sub-pump 520b. Wherein, one end of the second sub-medium storage tank 510b is in communication with the fluid interface 112, the other end is in communication with one end of the second sub-pump 520b, the other end of the second sub-pump 520b is in communication with a first side of the second fluid heat exchanger 204b, and a second side of the second fluid heat exchanger 204b is in communication with the fluid interface 112 to form a circulation loop. It is worth mentioning that the second side of the second fluid heat exchanger 204b can also be directly communicated with one end of the second sub-medium storage tank 510b through a switching branch to provide an emergency switching function.

[0094] Alternatively, please refer to FIG. 6 and FIG. 7, in an embodiment, the thermal management module 500 includes a main path 50, which includes a medium storage tank 510 and a pump 520 in turn communicated through pipelines. The second side of the fluid heat exchanger 204 is connected in the main path and connected with the outlet of the pump 520 through pipelines, and the medium storage tank 510 stores an insulation heat exchange fluid 503. Wherein, the medium storage tank 510 can be configured as an expansion tank, which stores the insulation heat exchange fluid 503. The capacity of the expansion tank needs to be determined according to the fluid consumption of the device heat exchange branch 501 and the fluid consumption in the battery heat exchange branch 502, and a certain amount is reserved. The pump 520 is used to drive the insulation heat exchange fluid 503 to flow in the battery heat exchange branch 502 and / or the device heat exchange branch 501. The power of the pump is calculated according to the flow resistance. The pump 520 can be integrated into the fluid heat exchanger 204. The fluid heat exchanger 204 is used for heat exchange of the insulation heat exchange fluid 503. When the insulation heat exchange fluid 503 flows through the fluid heat exchanger 204, the temperature of the insulation heat exchange fluid 503 is lowered under the action of the fluid heat exchanger 204, so that the insulation heat exchange fluid 503 has a large temperature difference with the battery cell 122 and / or the charging power device 410, thereby enabling sufficient heat exchange.

[0095] Specifically, the expansion tank has a first tank opening and a second tank opening. The first tank opening is communicated with the pump 520 through a pipeline. The outlet of the pump 520 is communicated with the fluid heat exchanger 204 through a pipeline. The fluid heat exchanger 204 has a medium pump-out pipe 2041. The second tank opening is communicated with the medium return pipe 511. At this time, the medium return pipe 511, the expansion tank, the pump 520, the fluid heat exchanger 204 and the medium pump-out pipe 2041 are sequentially connected in series to form the main circuit of the embodiment.

[0096] As an optional implementation, the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in parallel and then connected in series to the main circuit to form a circulating loop. Specifically, referring to FIG. 8, the medium pump-out pipe 2041 is connected with a first three-way pipe 504. One interface of the first three-way pipe 504 is communicated with the fluid interface 112 through a pipeline. The other interface of the first three-way pipe 504 is communicated with the device cavity 110 through a pipeline. Similarly, the medium return pipe 511 is connected with a second three-way pipe 505. One interface of the second three-way pipe 505 is communicated with the fluid interface 112 through a pipeline. The other interface of the second three-way pipe 505 is communicated with the device cavity 110 through a pipeline. In this way, when the fluid interface 112 is connected with the aircraft interface of the eVTOL, the one interface of the first three-way pipe 504, the battery cavity 12A and the one interface of the second three-way pipe 505 are sequentially connected to form the battery heat exchange branch 502. The other interface of the first three-way pipe 504, the device cavity 110 and the other interface of the second three-way pipe 505 are sequentially connected to form the device heat exchange branch 501.

[0097] In the embodiment, when the fluid interface 112 is connected with the aircraft interface of the eVTOL, the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in parallel and then connected in series to the main circuit to form a circulating loop. At this time, the pump 520 delivers the insulation heat exchange fluid 503 to the fluid heat exchanger 204 for cooling. The cooled insulation heat exchange fluid 503 is divided into two paths at the first three-way pipe 504 after passing through the medium pump-out pipe 2041:

[0098] The device heat exchange branch 501: The insulation heat exchange fluid 503 passes through the first device hole 1111 into the device cavity 110 to directly contact with each charging power device 410 for heat exchange to be heated. The heated insulation heat exchange fluid 503 passes through the second device hole 1112 and the pipeline to return to the second three-way pipe 505, and then returns to the expansion tank through the medium return pipe 511.

[0099] The battery heat exchange branch 502: The insulation heat exchange fluid 503 enters the battery cavity 12A through the fluid interface 112 to directly contact with the battery cell 122 for heat exchange to be heated. The heated insulation heat exchange fluid 503 passes through the second battery cavity hole and the fluid interface 112 to return to the second three-way pipe 505, and then returns to the expansion tank through the medium return pipe 511.

[0100] In this embodiment, the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in parallel to the same main line, so that the insulation heat exchange fluid 503 delivered from the main line is divided into two paths to enter the device heat exchange branch 501 and the battery heat exchange branch 502, so that the insulation heat exchange fluid 503 cooled by the fluid heat exchanger 204 can enter the device heat exchange branch 501 or the battery heat exchange branch 502 as soon as possible for heat exchange, and the insulation heat exchange fluid 503 in the two branches does not affect each other, so as to ensure the cooling effect of the insulation heat exchange fluid 503 in each branch.

[0101] Alternatively, as another optional embodiment, the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in series with the main line to form a circulation loop.

[0102] Please refer to FIG. 6, as an option of this embodiment: the medium pump-out pipe 2041 is connected with the first battery cavity hole of the battery cavity 12A through the pipe, the fluid interface 112, and a return pipe is arranged at the fluid interface 112, the battery cavity 12A is connected with the first device hole 1111 of the device cavity 110 through the second battery cavity hole, the fluid interface 112 and the return pipe, and the second device hole 1112 of the device cavity 110 is connected with the medium return pipe 511. At this time, the main line, the battery heat exchange branch 502 and the device heat exchange branch 501 are connected in series, and the three form a circulation loop, and the insulation heat exchange fluid 503 pumped out of the main line first enters the battery heat exchange branch 502, then enters the device heat exchange branch 501, and finally flows into the main line.

[0103] Alternatively, as another option of this embodiment: the medium return pipe 511 is connected with the second battery cavity hole of the battery cavity 12A through the pipe, the fluid interface 112, and a delivery pipe is arranged at the fluid interface 112, the first battery cavity hole of the battery cavity 12A is connected with the second device hole 1112 of the device cavity 110 through the fluid interface 112 and the delivery pipe, and the first device hole 1111 of the device cavity 110 is connected with the medium pump-out pipe 2041. At this time, the main line, the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in series, and the three form a circulation loop, and the insulation heat exchange fluid 503 pumped out of the main line first enters the device heat exchange branch 501.

[0104] It can be seen that, compared with the parallel mode, the pipeline connection of the series mode is simpler. It should be noted that, since the temperature tolerated by the charging power device 410 is higher than the temperature tolerated by the battery cell 122 in the battery pack, the battery heat exchange branch 502 is connected in series upstream of the device heat exchange branch 501, so that the insulation heat exchange fluid 503 cooled by the fluid heat exchanger 204 first flows through the battery heat exchange branch 502 to cool the battery cell 122, and then flows through the device heat exchange branch 501 to cool various charging power devices 410. In this mode, the parameters of the insulation heat exchange fluid 503 can be designed only with the cooling demand of the battery cell 122 as the control target, without considering the cooling demand of the battery cell 122 and the cooling demand of the charging power device 410 comprehensively. In this way, not only can the cooling effect of the battery be prioritized, but also the complexity of temperature regulation of the insulation heat exchange fluid 503 can be reduced.

[0105] As can be seen, in the embodiment, the device heat exchange branch 501 and the battery heat exchange branch 502 are both temperature-controlled by the fluid heat exchanger 204 on the same main line, reducing the number of components of the thermal management module 500, and also reducing the volume and weight of the thermal management module 500, thereby facilitating the miniaturization of the ground maintenance system.

[0106] In an embodiment, the thermal management module 500 further comprises an air charging and liquid replacing assembly 530; wherein the air charging and liquid replacing assembly 530 is in communication with the battery heat exchange branch 502, and the air charging and liquid replacing assembly 530 is configured to input non-combustible gas into the battery cavity 12A to discharge the insulation heat exchange fluid 503 from the battery cavity 12A.

[0107] In this way, when the temperature of the battery pack is adjusted to the preset temperature or is fully charged, the eVTOL 10 can input non-combustible gas into the battery heat exchange branch 502 through the air charging and liquid replacing assembly 530 during the flight takeoff preparation phase. After the non-combustible gas enters the battery cavity 12A through one of the first battery cavity hole and the second battery cavity hole, it pushes the insulation heat exchange fluid 503 in the battery cavity 12A out of the battery cavity 12A through the other of the first battery cavity hole and the second battery cavity hole. On the one hand, the insulation heat exchange fluid 503 in the battery cavity 12A is discharged, and on the other hand, the eVTOL 10 fills the battery cavity 12A with non-combustible gas during flight, so as to suppress the combustion of the battery in the event of thermal runaway in the battery cavity 12A.

[0108] Alternatively, when it is necessary to repair and maintain the circuit in the device cavity 110 or for other reasons to discharge the insulation heat exchange fluid 503, the insulation heat exchange fluid 503 in the device cavity 110 also needs to be discharged. To this end, in an embodiment, the thermal management module 500 further comprises an air charging and liquid replacing assembly 530, the air charging and liquid replacing assembly 530 is in communication with the device heat exchange branch 501, and the air charging and liquid replacing assembly 530 is configured to input non-combustible gas into the device cavity 110 to discharge the insulation heat exchange fluid 503 from the device cavity 110.

[0109] Specifically, when it is necessary to discharge the insulating heat exchange fluid 503, non-combustible gas can be introduced into the heat exchange branch 501 of the device through the gas-filling liquid exchange assembly 530. After the non-combustible gas enters the device cavity 110 through one of the first device hole 1111 and the second device hole 1112, it squeezes the insulating heat exchange fluid 503 in the device cavity 110 out through the other of the first device hole 1111 and the second device hole 1112, thereby discharging the insulating heat exchange fluid 503 in the device cavity 110.

[0110] Of course, in some feasible implementations, when the battery heat exchange branch 502 and the device heat exchange branch 501 are connected in series, the insulating heat exchange fluid 503 in the battery cavity 12A and the device cavity 110 can be discharged simultaneously through a gas-filled drain assembly 530. It should be noted that when the gas-filled drain assembly 530 is working, the insulating heat exchange fluid 503 can return to the expansion tank under the action of non-combustible gas. In some examples, both the device heat exchange branch 501 and the battery heat exchange branch 502 are connected to drain branches that communicate with the outside via drain switch valves. Thus, when the insulating heat exchange fluid 503 in the battery cavity 12A or the device cavity 110 is discharged through the gas-filled drain assembly 530, the drain branch is opened and the expansion tank is closed, allowing the battery cavity 12A or the device cavity 110 to communicate with the outside, thereby providing a discharge channel for the insulating heat exchange fluid 503.

[0111] In this embodiment, non-combustible gas refers to gas other than combustible gas and oxidizing gas. In one embodiment, non-combustible gas includes one or more of inert gas, nitrogen, carbon dioxide, and sulfur hexafluoride.

[0112] Please refer to Figures 5, 6 and 7. In one example, the aeration and fluid exchange assembly 530 is configured as an aeration branch, which includes an aeration storage device 531 and an aeration valve 532 connected in sequence by a pipeline. The output end of the aeration branch is connected to the medium pump outlet pipe 2041 of the fluid heat exchanger 204, and a switch valve (not shown) is provided in the pipeline between the fluid heat exchanger 204 and the output end of the aeration branch.

[0113] Specifically, the medium pump-out pipe 2041 of the fluid heat exchanger 204 is connected to a switch valve, the switch valve is connected to a multi-way pipe (when the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in parallel, the multi-way pipe can be a four-way pipe, and when the device heat exchange branch 501 and the battery heat exchange branch 502 are connected in series, the multi-way pipe can be a three-way pipe), one port of the multi-way pipe is connected to the gas path valve 532 through a pipeline, and the gas path valve 532 is in communication with the gas storage device 531 through a pipeline. The gas storage device 531 can be a high-pressure gas storage device, and the gas path valve 532 is a pressure reducing valve. In this way, the gas pressure in the gas storage device 531 is relatively high, and under the action of high gas pressure, the non-combustible gas will pass through the fluid interface 112 along the pipeline into the battery cavity 12A in the eVTOL. After the non-combustible gas enters the battery cavity 12A, it will squeeze the insulating heat transfer fluid 503, so that the insulating heat transfer fluid 503 is discharged from the battery cavity 12A. In addition, under the action of the pressure reducing valve, the high-pressure non-combustible gas in the gas storage device 531 can be reduced and released to avoid the pipeline bearing too high a gas pressure, thereby avoiding damage to the pipeline, the battery core 122 in the battery cavity 12A, and the charging power device 410 in the device cavity 110. The switch valve arranged between the fluid heat exchanger 204 and the gas charging branch is used to switch to a closed state after the gas charging branch starts to work, thereby avoiding the non-combustible gas from entering the fluid heat exchanger 204 first, so as to improve the working efficiency of the gas charging and liquid discharging assembly.

[0114] Of course, in other embodiments, the gas charging branch can also be provided with a pump body to provide power for the flow of non-combustible gas. Alternatively, in other embodiments, the gas charging and liquid discharging assembly can also be arranged in the battery pack or at the device cavity 110.

[0115] It can be understood that after the ground maintenance system is connected to the eVTOL through the fluid interface 112, not only a charging channel for power transmission needs to be established between the ground maintenance system and the eVTOL 10, but also a medium channel for the flow of the insulating heat transfer fluid 503 needs to be established. The medium channel can be an independent medium channel cable, and at this time, when charging, not only the charging gun needs to be connected to the eVTOL, but also the independent medium channel cable needs to be connected to the eVTOL.

[0116] Alternatively, the medium channel can also be all or part of the charging gun integrated in the charging pile. For example, refer to FIG. 9, in an embodiment, the ground maintenance system further includes a charging gun 60, and the charging gun 30 includes a charging gun head 610 and a charging gun cable 620. The charging gun head 610 has a fluid interface 112 and a charging interface 111, the charging gun cable 620 is connected to the charging gun head 610, the charging gun cable 620 is provided with a plurality of wire cores 621 and a fluid pipe 6233, one end of the wire core 621 is connected to the charging interface 111, the other end of the wire core 621 is connected to the external charging module 400, one end of the fluid pipe 6233 is in communication with the fluid interface 112, and the other end of the fluid pipe 6233 is in communication with the thermal management module 500.

[0117] Please refer to FIG. 10, in the embodiment, the charging gun head 610 is provided with a fluid interface 112 in addition to the charging interface 111. Please refer to FIG. 11, the charging gun cable 620 is provided with a fluid pipeline 6233 in addition to the existing wire core. In order to avoid the volume and weight of the charging gun cable 620 being significantly increased compared with the charging gun cable 620 in the related art, the number of the fluid interface 112 and the fluid pipeline 6233 can be one each. At this time, the fluid pipeline 6233 in the charging gun cable 620 is only one of the channel through which the insulation heat exchange fluid 503 flows out of the ground maintenance system and enters the eVTOL and the channel through which the insulation heat exchange fluid 503 flows through the battery cavity 12A and returns to the ground maintenance system. The other one of the channel through which the insulation heat exchange fluid 503 flows out of the ground maintenance system and enters the eVTOL and the channel through which the insulation heat exchange fluid 503 flows through the battery cavity 12A and returns to the ground maintenance system can be provided by an additional medium channel cable arranged on the ground maintenance system.

[0118] Alternatively, in order to reduce the number of parts of the ground maintenance system and improve the operation convenience when the eVTOL is charged, the channel through which the insulation heat exchange fluid 503 flows out of the ground maintenance system and enters the eVTOL and the channel through which the insulation heat exchange fluid 503 flows through the battery cavity 12A and returns to the ground maintenance system are integrated on the charging gun cable 620. At this time, the number of the fluid interface 112 and the fluid pipeline 6233 is at least two, that is, at least one in and one out.

[0119] In addition, in order to avoid the fluid pipeline 6233 being blocked, the fluid pipeline 6233 in any direction can have a backup. Therefore, the number of the fluid interface 112 and the fluid pipeline 6233 can be greater than two. Alternatively, when the battery pack is in parallel (for example, the battery pack is arranged on both sides of the wings of the eVTOL, and the battery packs are in parallel with each other), the number of the fluid interface 112 and the fluid pipeline 6233 is greater than two, so that different fluid pipelines 6233 respectively provide medium channels for the corresponding battery packs.

[0120] It is worth mentioning that the fluid interface 112 and the fluid pipeline 6233 can be in one-to-one correspondence with each other, or one fluid interface 112 can be connected with two fluid pipelines 6233 to reduce the cross-sectional area of a single fluid pipeline 6233 and ensure the structural strength of the charging gun cable 620. Alternatively, one fluid pipeline 6233 can be connected with multiple fluid interfaces 112. For example, when the battery pack includes multiple battery packs, each battery pack is connected with a fluid interface 112, and the one fluid pipeline 6233 delivers the insulation heat exchange fluid 503 to all the battery packs.

[0121] As can be seen, in the embodiment, by integrating the medium channel for the insulation heat exchange fluid 503 into the charging gun cable 620, the charging gun has the functions of transmitting electric energy and transmitting the insulation heat exchange fluid 503, and the establishment of the electric energy channel and the medium channel is completed by one-time plugging of the charging gun and the eVTOL, thereby reducing the plugging steps of the eVTOL during charging, and further improving the charging efficiency of the eVTOL.

[0122] In addition, referring to FIG. 11, in an embodiment, cable phase change modules 623 are used to fill between the cores of the charging gun cable 620 and the protective layer of the outermost charging gun cable 620, and between adjacent cores 621. The material of the cable phase change module 623 includes a phase change material, so that during charging, compared with the related art of using plastic or high polymer material to fill the gap between the core 621 and the protective layer 622, the phase change material can absorb the heat generated by the core 621, thereby effectively reducing the temperature of the charging gun cable 620, and avoiding the phenomenon of overheating of the charging gun cable 620 during charging.

[0123] For at least part of the fluid pipe 6233, it can be configured as a variable diameter structure. In some embodiments, the cable phase change module 623 includes a plurality of first sub-phase change filling bodies 6231 arranged in sequence and spaced apart along the wiring direction of the charging gun cable 620, and the first sub-phase change filling body 6231 has a first through hole, so that the cavities between any two adjacent first sub-phase change filling bodies 6231 in the plurality of first sub-phase change filling bodies 6231 are communicated through the first through hole to form the fluid pipe 6233. It can be understood that the adjacent first sub-phase change filling bodies 6231 are communicated through the first through hole, and the flow passage cross section of the fluid pipe 6233 is contracted at each first through hole, thereby causing the flow passage cross section to change more sharply in the fluid flow direction of the fluid pipe 6233, which will effectively slow down the flow rate of the insulation heat exchange fluid 503, so that the insulation heat exchange fluid 503 can fully exchange heat with the core 621.

[0124] In addition, in some embodiments, the insulation heat exchange fluid 503 entering the eVTOL 10 does not intentionally cool the charging gun cable 620 and the charging gun head 610 when flowing through the fluid pipe 6233 in the charging gun cable 620, but the charging gun cable 620 is cooled by the first cable cooling channel and the second cable cooling channel additionally arranged in the charging gun cable 620. The first cable cooling channel and the second cable cooling channel are channels arranged in parallel with the fluid pipe 6233 in the charging gun cable 620, both extending through the charging gun cable 620 along the wiring direction of the charging gun cable 620. The first cable cooling channel and the second cable cooling channel are both used for the insulation heat exchange fluid 503 to flow through. However, unlike the fluid pipe 6233, the first cable cooling channel, the second cable cooling channel and the head cooling cavity arranged in the charging gun head jointly form a U-shaped channel in the charging gun. In addition, the head cooling cavity can also be used to cool at least part of the charging terminals of the charging gun head.

[0125] It should be noted that the above-mentioned various pipes in the machine body can be configured as hoses or hard pipes, and the present embodiment does not limit this.

[0126] In an embodiment, the ground maintenance system further comprises an energy storage module 700, and the cold and heat source module, the external charging module and the thermal management module 500 are connected with the energy storage module 700; the energy storage module 700 comprises a plurality of parallel detachable batteries, and the detachable batteries are consistent in specification with the battery packs in the battery cavity 12A.

[0127] The energy source of the ground maintenance system is the energy storage module 700, and the energy storage module 700 is connected with the cold and heat source module, the external charging module 400 and the thermal management module 500, thereby providing electric energy to each module and not affecting normal operation without power grid input. Specifically, the power grid or the power generation system is connected with the energy storage module 700, and the energy storage module 700 stores low-price power grid power or clean power generation power to provide power source for other functional modules of the ground maintenance system.

[0128] It can be understood that the use of clean power generation combined with energy storage can significantly reduce the eVTOL power operation cost and improve the operation and maintenance reliability.

[0129] In addition, the energy storage module 700 includes a plurality of detachable batteries in parallel, and the detachable batteries are consistent in specification with the battery pack in the battery cavity 12A. Specifically, the consistency in specification refers to the attributes such as model, size, product parameters, performance indicators of the detachable batteries and the battery pack being consistent with the same standards and requirements, so that the two are interchangeable. That is, the battery can be designed as a modular battery, which is of the same specification as the on-board battery. When charging and maintaining on the ground, the battery replacement mode can be selected to quickly replace the eVTOL battery, which can quickly respond to the replacement of the on-board battery of the eVTOL 10 when the battery needs to be replaced, while reducing the cost of the required reserve battery, reducing the system operation cost and improving the overall operation reliability.

[0130] In addition, referring to FIGS. 12 and 13, in an embodiment, the ground maintenance system further includes a movable carrier 900 and an electric energy driving module 800, and the airframe 100 and the energy storage module 700 are arranged on the movable carrier. The electric energy driving module 800 is arranged on the movable carrier and is used to drive the movable carrier 900 to move; and the energy storage module 700 is connected with the electric energy driving module 800.

[0131] It can be understood that the ground maintenance system can be arranged in a ground fixed facility such as a maintenance station, and can also be integrated into a movable carrier 900 such as a ground service vehicle having a moving capability. Of course, the moving capability of the movable carrier 900 is not limited to the ground moving capability, the flight capability and the water moving capability. Specifically, the movable carrier is a machine or equipment having a moving capability and being used to carry equipment and / or personnel. It can be understood that the moving capability includes but is not limited to the ground moving capability, the air moving capability, the water moving capability and the underwater moving capability. Therefore, the movable carrier 900 includes but is not limited to a vehicle, a ship and an aircraft. Hereinafter, the movable carrier is taken as a vehicle, i.e., the ground service equipment of the electric vehicle is taken as a ground service vehicle as an example for illustration.

[0132] The electric energy driving module 800 is a power assembly unit of the movable carrier. For the ground service vehicle, the electric energy driving module 800 is a key part for converting electric energy into mechanical energy to drive the ground service vehicle to move. It can be understood that the electric energy driving module 800 includes but is not limited to a motor, a reducer, an inverter and the like.

[0133] As can be seen, compared with the independent battery used for respectively supplying power to the electric energy driving module 800 and the external charging module 400, in the embodiment, the electric energy driving module 800 for driving the movable carrier to move and the external charging module 400 for charging the battery pack of the electric vehicle are both connected with the energy storage module 700, so that the electric energy used by the two is provided by the energy storage module 700, thereby reducing the cost of the ground service equipment.

[0134] In addition, the detachable battery in the energy storage module 700 is consistent in specification with the battery pack of the electric vehicle. Specifically, the consistency in specification refers to the attributes such as model, size, product parameters, performance indicators, etc. of the energy storage battery and the battery pack being consistent with the same standards and requirements, so that the two are interchangeable. When the electric vehicle needs to replace the battery pack, the detachable battery on the ground service vehicle can be directly replaced as a spare part on the electric vehicle, so that one ground service vehicle can provide multiple support capabilities, and a single ground service vehicle operation can meet the support task requirements, thereby improving the support capability of the ground service vehicle and reducing the support cost of the eVTOL. And by integrating most of the functions required for eVTOL ground support into a ground service vehicle, the eVTOL can take off and land at an airport that originally has no ground support facilities, reducing the construction cost of the airport and facilitating the promotion and operation of the eVTOL.

[0135] The above is only an exemplary embodiment of the present application, and does not limit the protection scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the protection scope of the present application.

Claims

1. A ground maintenance system, wherein, The ground maintenance system comprises: a movable carrier, which defines a device cavity inside the movable carrier, and further comprises a charging interface, a fluid interface and an air interface; an external charging module, which is arranged in the device cavity and connected with the charging interface; a cold and heat source module, which is arranged in the movable carrier and defines a refrigerant loop; an ex situ air conveying pipeline, which is arranged in the movable carrier and communicates with the air interface, and is configured to convey air into a vehicle when the air interface is connected with the vehicle; wherein the refrigerant in the refrigerant loop exchanges heat with the air in the ex situ air conveying pipeline; a thermal management module, which is arranged in the movable carrier and communicates with the device cavity to form a device heat exchange branch, and is connected with the fluid interface, so that when the fluid interface is connected with the vehicle, the thermal management module communicates with a battery cavity of the vehicle to form a battery heat exchange branch, and the insulating heat exchange fluid in the thermal management module flows in the battery heat exchange branch and fills into the battery cavity; wherein the refrigerant also exchanges heat with the insulating heat exchange fluid; and an energy storage module, which is arranged in the movable carrier and connected with the cold and heat source module, the external charging module and the thermal management module.

2. The ground maintenance system of claim 1, wherein, The refrigerant loop comprises a first refrigerant branch and a second refrigerant branch connected in parallel, the refrigerant in the first refrigerant branch exchanges heat with the air in the ex situ air conveying pipeline, and the refrigerant in the second refrigerant branch exchanges heat with the insulating heat exchange fluid.

3. The ground maintenance system of claim 2, wherein, The ground maintenance system further comprises: an air heat exchanger, which is connected in the first refrigerant branch on a first side and connected in the ex situ air conveying pipeline on a second side, and is configured to exchange heat between the refrigerant in the first refrigerant branch and the air in the ex situ air conveying pipeline; and a fluid heat exchanger, which is connected in the second refrigerant branch on a first side and connected in the thermal management module on a second side, and is configured to exchange heat between the refrigerant in the second refrigerant branch and the insulating heat exchange fluid in the thermal management module.

4. The ground maintenance system of claim 3, wherein, The thermal management module comprises a main loop, which comprises a medium storage tank and a pump connected in series through pipelines, the second side of the fluid heat exchanger is connected in the main loop and connected with an outlet of the pump through a pipeline, and the insulating heat exchange fluid is stored in the medium storage tank; wherein the device heat exchange branch and the battery heat exchange branch are connected in series to the main loop to form a circulation loop; or the device heat exchange branch, the battery heat exchange branch and the main loop are connected in series to form a circulation loop.

5. The ground maintenance system of claim 4, wherein, When the device heat exchange branch and the battery heat exchange branch are connected in series with the main line, the device heat exchange branch and the battery heat exchange branch are connected in series to the main line in turn.

6. The ground maintenance system of claim 1, wherein, The thermal management module further comprises a gas liquid replacement assembly; The gas liquid replacement assembly is in communication with the battery heat exchange branch, and the gas liquid replacement assembly is configured to input non-combustible gas into the battery cavity to discharge the insulation heat exchange fluid from the battery cavity; and / or the gas liquid replacement assembly is in communication with the device heat exchange branch, and the gas liquid replacement assembly is configured to input non-combustible gas into the device cavity to discharge the insulation heat exchange fluid from the device cavity. The non-combustible gas comprises one or more of inert gas, nitrogen, carbon dioxide and sulfur hexafluoride.

7. The ground maintenance system of claim 1, wherein, The thermal management module comprises: A first thermal management sub-module in communication with the device heat exchange branch; and A second thermal management sub-module in communication with the battery heat exchange branch.

8. The ground maintenance system of claim 1, wherein, The movable carrier comprises a charging gun, and the charging gun comprises: A charging gun head having the fluid interface and the charging interface; and A charging gun cable connected with the charging gun head, the charging gun cable being provided with a plurality of cores and a fluid pipeline therein, one end of the core being connected with the charging interface, the other end of the core being connected with the external charging module, one end of the fluid pipeline being in communication with the fluid interface, and the other end of the fluid pipeline being in communication with the thermal management module.

9. The ground maintenance system of claim 1, wherein, The energy storage module comprises a plurality of detachable batteries connected in parallel, and the detachable batteries are consistent in specification with the battery pack in the battery cavity.

10. The ground maintenance system of claim 9, wherein, The ground maintenance system further comprises an electric energy driving module, the electric energy driving module being arranged in the movable carrier and configured to drive the movable carrier to move. The energy storage module is connected with the electric energy driving module.

11. A ground maintenance system, wherein, The ground maintenance system comprises: A machine body defining a device cavity therein, the machine body further comprising a charging interface, a fluid interface and an air interface; An external charging module arranged in the device cavity and connected with the charging interface; A cold and heat source module arranged in the machine body, the cold and heat source module defining a refrigerant circuit; An ex situ air conveying pipeline arranged in the machine body and in communication with the air interface, the ex situ air conveying pipeline being configured to convey air into a vehicle when the air interface is connected with the vehicle; wherein the refrigerant in the refrigerant circuit exchanges heat with the air in the ex situ air conveying pipeline; and The ex situ air conveying pipeline is arranged in the machine body and in communication with the air interface, the ex situ air conveying pipeline being configured to convey air into a vehicle when the air interface is connected with the vehicle; wherein the refrigerant in the refrigerant circuit exchanges heat with the air in the ex situ air conveying pipeline. A thermal management module is arranged in the machine body, and the thermal management module is in communication with the device cavity to form a device heat exchange branch. An insulating heat exchange fluid in the thermal management module flows in the device heat exchange branch and fills the device cavity. The thermal management module is in communication with the fluid interface. When the fluid interface is connected with the vehicle, the thermal management module is in communication with the battery cavity of the vehicle to form a battery heat exchange branch. The insulating heat exchange fluid flows in the battery heat exchange branch and fills the battery cavity. The coolant exchanges heat with the insulating heat exchange fluid.

12. The ground maintenance system of claim 11, wherein, The coolant circuit includes a first coolant branch and a second coolant branch in parallel. The coolant in the first coolant branch exchanges heat with the air in the air delivery pipeline. The coolant in the second coolant branch exchanges heat with the insulating heat exchange fluid.

13. The ground maintenance system of claim 12, wherein, The ground maintenance system further includes: An air heat exchanger is connected to the first coolant branch on a first side and connected to the air delivery pipeline on a second side. The air heat exchanger is configured to exchange heat between the coolant in the first coolant branch and the air in the air delivery pipeline. A fluid heat exchanger is connected to the second coolant branch on a first side and connected to the thermal management module on a second side. The fluid heat exchanger is configured to exchange heat between the coolant in the second coolant branch and the insulating heat exchange fluid in the thermal management module.

14. The ground maintenance system of claim 13, wherein, The thermal management module includes a main circuit including a medium storage tank and a pump in communication through a pipeline. The second side of the fluid heat exchanger is connected to the main circuit and connected to the outlet of the pump through a pipeline. The insulating heat exchange fluid is stored in the medium storage tank. The device heat exchange branch and the battery heat exchange branch are connected in parallel and then connected in series to the main circuit to form a circulation loop. Alternatively, the device heat exchange branch, the battery heat exchange branch, and the main circuit are connected in series to form a circulation loop.

15. The ground maintenance system of claim 14, wherein, When the device heat exchange branch, the battery heat exchange branch, and the main circuit are connected in series, the device heat exchange branch and the battery heat exchange branch are connected in series to the main circuit in sequence.

16. The ground maintenance system of claim 11, wherein, The thermal management module further includes a gas liquid replacement assembly. The gas liquid replacement assembly is connected to the battery heat exchange branch and configured to input non-combustible gas into the battery cavity to discharge the insulating heat exchange fluid from the battery cavity. The gas liquid replacement assembly is also connected to the device heat exchange branch and configured to input non-combustible gas into the device cavity to discharge the insulating heat exchange fluid from the device cavity. The non-combustible gas includes one or more of inert gas, nitrogen, carbon dioxide, and sulfur hexafluoride.

17. The ground maintenance system of claim 11, wherein, The thermal management module includes: A first thermal management sub-module connected to the device heat exchange branch; and A second thermal management sub-module connected to the battery heat exchange branch.

18. The ground maintenance system of any one of claims 11 to 17, wherein, The material of the insulation heat exchange fluid is deionized water, electronic fluorination liquid, hydrocarbon, ester or silicone oil.

19. The ground maintenance system of claim 18, wherein, The machine body comprises a charging gun, and the charging gun comprises: a charging gun head having the fluid interface and the charging interface; a charging gun cable connected with the charging gun head, the charging gun cable being provided with a plurality of wire cores and a fluid pipeline, one end of the wire core being connected with the charging interface, the other end of the wire core being connected with the external charging module, one end of the fluid pipeline being in communication with the fluid interface, and the other end of the fluid pipeline being in communication with the thermal management module.

20. The ground maintenance system of claim 11, wherein, The ground maintenance system further comprises an energy storage module, and the cold and heat source module, the external charging module and the thermal management module are connected with the energy storage module. The energy storage module comprises a plurality of detachable batteries connected in parallel, and the detachable batteries are consistent in specification with the battery packs in the battery cavities.

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