Electric cable equipped with cooling means, Electric assembly, Flying vehicle and Charging platform integrating said electric cable, and Charging method using said electric cable

Abstract

The invention relates to an electric cable equipped with cooling means, an electrical assembly, a flying vehicle and a charging platform integrating said electric cable, and a charging method using said electric cable. The electric cable (10) comprises an electrical conductor and a conduit arranged circumferentially around said electrical conductor and configured to be traversed by a cooling fluid. The method for charging a rechargeable battery (102) of a flying vehicle (100) using said cable comprises a step of electrically connecting said cable to said battery, a step of recharging said battery and a step of cooling said cable during the step of recharging said battery. This cable thus has limited heating during its use. Figure 14

Description

Title of the invention: Electric cable equipped with cooling means, Electric assembly, Flying vehicle and Charging platform integrating said electric cable, and Charging method using said electric cable Technical field

[0001] The present application relates to an electrical cable, for example to a connection cable connecting two electrical devices together or to a charging cable for electrical equipment, comprising an electrical conductor and means for cooling said electrical conductor directly integrated into said electrical cable.

[0002] The present application also relates to an electrical assembly, for example to an assembly for connection to electrical equipment or to an assembly for charging electrical equipment, comprising said electrical cable, as well as a connector intended to provide the interface between said electrical cable and said electrical equipment.

[0003] The present application also relates to a flying vehicle, for example an eVTOL aircraft, comprising electrical equipment, such as a rechargeable battery and a battery management system, as well as said electrical assembly electrically and fluidically connected to said electrical equipment.

[0004] The present application further relates to a loading platform comprising said electrical assembly, as well as a device for cooling the electrical cable.

[0005] Finally, the present application relates to a method of charging electrical equipment, for example rechargeable batteries of a flying vehicle, by means of said charging platform. STATE OF THE PRIOR ART

[0006] As is known, electric vertical take-off and landing (eVTOL) aircraft are equipped with rechargeable batteries for the propulsion of said aircraft. In order to recharge their batteries during ground phases, eVTOL aircraft can land on charging platforms allowing power to be transmitted from said platform to the batteries of said eVTOL aircraft.

[0007] In order to accelerate the charging of these batteries, it is necessary to increase the power transmitted from the loading platform, installed on the ground, to the batteries of said eVTOL aircraft.

[0008] One solution for increasing the power transmitted when recharging the batteries of an eVTOL aircraft would be to increase the electrical voltage in the charging cable. However, since the batteries of an eVTOL aircraft are calibrated to operate at a predetermined electrical voltage, it would then be necessary to install an electrical voltage step-down converter in the eVTOL aircraft. This would result in an increase in the weight of the eVTOL aircraft, as well as power losses due to the conversion of the electrical voltage. This solution is therefore not optimal.

[0009] Another solution for increasing the power transmitted when recharging the batteries of an eVTOL aircraft would consist of increasing the electric current flowing in the charging cable. However, for a charging power of 1 MW, at 800 V (nominal electrical voltage of a charging platform), the electric current required to recharge a battery of an eVTOL aircraft would be at least 1250 A, which represents, for an uncooled charging cable, a copper cross-section that is too large for the charging cable to be handled by an operator. Indeed, such an electric current implies, by Joules effect, a heating of the charging cable, if the cross-section of the conductor is not increased.Taking into account the aeronautical constraints related to weight, the handling of the charging cable and the size of the connector between the charging cable and the eVTOL aircraft that this implies for ground operators on the charging platforms, the cable cross-section cannot be increased significantly. This solution is therefore not optimal as such.

[0010] There is therefore a need to limit the heating of the charging cables used to recharge the batteries of eVTOL aircraft. Summary of the invention

[0011] The present invention aims to propose a solution making it possible to limit the heating of an electric cable, for example a charging cable intended to recharge the batteries of a flying vehicle.

[0012] For this purpose, the invention relates to an electric cable, said electric cable extending in a longitudinal direction, and comprising: - an electrical conductor extending in the longitudinal direction, and - a first conduit extending in the longitudinal direction and being delimited radially to the longitudinal axis by a first internal wall and a first external wall so as to define at least a first channel between said first internal and external walls, said first conduit being arranged circumferentially around said electrical conductor, said first channel being configured to be traversed by a cooling fluid.

[0013] Advantageously, the electrical cable is cooled during operation by the cooling fluid, which makes it possible to limit heating of the electrical conductor, and therefore to improve the passage of the electric current through said electrical cable. When the electrical cable is a charging cable electrically connected to batteries of a flying vehicle, this cable makes it possible to improve the recharging of said batteries. In addition, since the electrical cable is cooled homogeneously, the parts of the cable accessible to an operator on the ground or which may be in contact with the operator on the ground have a correct surface temperature, which makes it possible to avoid any risk of bodily harm to the operator on the ground.

[0014] According to another characteristic, the first conduit is delimited radially to the longitudinal axis by said first internal and external walls so as to define at least first and second channels between said first internal and external walls, said first channel being fluidically connected to said second channel, said first channel being configured to be traversed by the cooling fluid in the longitudinal direction in a first direction, and said second channel being configured to be traversed by the cooling fluid in the longitudinal direction in a second direction opposite to said first direction.

[0015] According to another characteristic, the first conduit is delimited radially to the longitudinal axis by said first internal and external walls so as to define a plurality of first and second channels between said first internal and external walls, said first channels being alternated with said second channels circumferentially around the electrical conductor, said first channels being fluidically connected to said second channels, said first channels being configured to be traversed by the cooling fluid in the longitudinal direction in a first direction, and said second channels being configured to be traversed by the cooling fluid in the longitudinal direction in a second direction opposite to said first direction.

[0016] According to another characteristic, the electric cable also comprises a second conduit extending in the longitudinal direction and being delimited radially to the longitudinal axis by a second internal wall and a second external wall so as to define at least one second channel between said second internal and external walls, said second conduit being arranged circumferentially around said first conduit, said first channel being fluidically connected to said second channel, said first channel being configured to be traversed by the cooling fluid in the longitudinal direction in a first direction, and said second channel being configured to be traversed by the cooling fluid in the longitudinal direction in a second direction opposite to said first direction.

[0017] According to another characteristic, the first conduit is delimited radially to the longitudinal axis by said first internal and external walls so as to define a plurality of first channels between said first internal and external walls, the second conduit is delimited radially to the longitudinal axis by said second internal and external walls so as to define a plurality of second channels between said second internal and external walls, said first channels being fluidically connected to said second channels, said first channels being configured to be traversed by the cooling fluid in the longitudinal direction in a first direction, and said second channels being configured to be traversed by the cooling fluid in the longitudinal direction in a second direction opposite to said first direction.

[0018] The invention also relates to an electrical assembly comprising an electrical cable according to the invention, the or each first channel having a first inlet and a first outlet for the cooling fluid and the or each second channel having a second inlet and a second outlet for the cooling fluid, said electrical assembly also comprising a connector comprising a first electrical interface electrically connected to the electrical conductor of the electrical cable and a second fluidic interface fluidly connected to the first outlet of said or each first channel and to the second inlet of said or each second channel of the electrical cable so that the first and second channels of the electrical cable and the connector are traversed by the cooling fluid.

[0019] According to one characteristic, the second fluidic interface is configured to fluidly connect the first output of said or each first channel to the second input of said or each second channel of the electrical cable.

[0020] The invention also relates to a flying vehicle comprising at least one piece of electrical equipment and at least one electrical assembly according to the invention, the first electrical interface of the connector of the electrical assembly being electrically connected to said piece of electrical equipment.

[0021] According to one characteristic, the flying vehicle also comprises a cooling circuit, and the second fluid interface of the connector of the electrical assembly is fluidically connected to said cooling circuit.

[0022] According to one characteristic, the cooling circuit is arranged near or in contact with said batteries, or passes through said batteries, so as to optimize the cooling of said batteries.

[0023] The invention also relates to a loading platform comprising: - an electrical assembly according to the invention, - a source of electrical energy electrically connected to the conductor

[0024]

[0025]

[0026]

[0027]

[0028]

[0029] electric cable electric, - a fluid reservoir, fluidly connected to the second output of the electric cable, - cooling means fluidically connected to the reservoir and configured to cool the fluid of said reservoir so as to obtain a cooling fluid, - pressurizing means fluidly connected to the cooling means and to the first inlet of the electrical cable, and configured to pressurize the cooling fluid and to circulate the cooling fluid in the electrical cable. The invention also relates to a method for charging at least one rechargeable battery of a flying vehicle by means of a charging platform according to the invention, said method comprising: - an electrical connection step during which the connector is electrically connected to the battery of the flying vehicle, - a recharging step during which electrical energy is transmitted from the electrical energy source to said battery by means of the electrical conductor of the electrical cable, and - a cooling step during which the cooling fluid circulates in the first channel of the electric cable. According to one feature, the recharging step and the cooling step are simultaneous. The invention thus makes it possible to reduce the complexity of the work of ground operators, by limiting the section, the diameter, as well as the mass of the electric cable, while maintaining flexibility and correct maneuverability of said electric cable when connecting and disconnecting it from the flying vehicle. Recharging the batteries of the flying vehicle is thus faster than with an electric cable according to the prior art. Since the electric cable does not heat up, its use is more reliable than that of an electric cable according to the prior art. Since the electric cable cooling system is located on the ground, the flying vehicle is lighter. This therefore allows for weight savings, either by avoiding the need to carry bulky cooling systems, such as heat pumps, in the flying vehicle, or by carrying less bulky cooling systems (such as heat pumps), which are then used to optimize the condition of the batteries before, during or after a flight. Brief description of the drawings

[0030] Other characteristics and advantages will emerge from the description of the invention which follows, a description given by way of example only, with reference to the appended drawings, among which:

[0031] [Fig-1] is a schematic sectional view of an electric cable installed between two electrical equipment, which illustrates an embodiment of the invention,

[0032] [Fig.2A] is a schematic sectional view of a flying vehicle, a loading platform and an electrical assembly, which illustrates an embodiment of the invention,

[0033] [Fig.2B] is a schematic perspective view of the electric cable of [Fig.2A],

[0034] [Fig.3] is a schematic sectional view of a flying vehicle, a platform of loading and an electrical assembly, which illustrates another embodiment of the invention,

[0035] [Fig.4] is a schematic perspective view of the electric cable of [Fig.3],

[0036] [Fig.5] is a schematic perspective view of an electric cable, illustrating a another embodiment of the invention,

[0037] [Fig.6] is a schematic perspective view of an electric cable, illustrating a another embodiment of the invention,

[0038] [Fig.7] is a schematic perspective view of an electrical assembly, illustrating another embodiment of the invention,

[0039] [Fig.8] is a schematic sectional view of the electrical cable of [Fig.7],

[0040] [Fig.9] is a schematic perspective view of an electric cable, illustrating a another embodiment of the invention,

[0041] [Fig. 10] is a schematic sectional view of an electric cable, illustrating another embodiment of the invention,

[0042] [Fig. 11] is a schematic sectional view of an electrical assembly, illustrating a another embodiment of the invention,

[0043] [Fig. 12] is a schematic sectional view of a flying vehicle and an assembly electric, which illustrates another embodiment of the invention,

[0044] [Fig. 13] is a schematic sectional view of a flying vehicle and an assembly electric, which illustrates another embodiment of the invention,

[0045] [Fig. 14] is a schematic sectional view of an eVTOL aircraft, a platform charging and an electrical assembly, which illustrates another embodiment of the invention, and

[0046] [Fig. 15] is a flowchart of the different stages of a loading process of a rechargeable battery of a flying vehicle according to one embodiment of the invention.

[0047] In these figures, the different elements are not represented proportionally to each other, for reasons of clarity. DETAILED DESCRIPTION OF THE INVENTION

[0048] [Fig.l] represents an embodiment of an electrical cable 10 electrically and fluidically connected between a first electrical equipment 410 and a second electrical equipment 420, by means of connectors 300a, 300b present at each end 10a, 10b of the cable 10.

[0049] In a non-limiting manner, the electrical equipment 410, 420 can be integrated into a flying vehicle, such as an eVTOL aircraft, and correspond for example to a fuel cell (known as a “fuel cell” in English), and to an inverter (known as an “inverter” in English).

[0050] In the remainder of the description, and in a non-limiting manner, the first electrical equipment 410 will generally be represented as a source of electrical energy, and the second electrical equipment 420 will generally be represented as a rechargeable battery of an eVTOL aircraft. The electrical cable 10 will then be described as a charging cable, but may of course have other functions than an electrical energy transfer function. For example, the cable 10 may be a connection cable having the function of transmitting an electric current from one electrical equipment to another.

[0051] The cable 10 extends longitudinally in a longitudinal direction X, between its first end 10a and its second end 10b, and radially to the longitudinal direction X in the radial directions Y and vertical directions Z.

[0052] The cable 10 comprises an electrical conductor 12, which extends longitudinally in the longitudinal direction X, between a first end 12a and a second end 12b. The electrical conductor 12 is for example made of copper or aluminum. The electrical conductor 12 is surrounded by at least one, generally a plurality of, layers of electrically insulating materials 18. These layers of electrically insulating materials 18 are chosen so as to allow high thermal dissipation of the thermal calories generated by the electrical conductor 12 in use. For example, the layers of electrically insulating materials 18 are made of silicone, fluoropolymer or any other extrudable materials making it possible to maintain a continuous temperature above 200°C.

[0053] The cable 10 also comprises a first cylindrical conduit 14 arranged circumferentially around the electrical conductor 12. The first conduit 14 and the electrical conductor 12 are coaxial. The first conduit 14 extends longitudinally in the longitudinal direction X, between a first end 14a and a second end 14b. The first conduit 14 is delimited longitudinally between first and second crown-shaped partitions, and radially between a first internal wall 14i and a first external wall 14e, between which a first internal wall 14i and a first external wall 14e are formed. a first channel 16 for circulation of a cooling fluid F. The first internal wall 14i and external wall 14e are connected to each other, at the ends 14a, 14b, by the first and second partitions. The first channel 16 has a general shape of a hollow cylinder, the electrical conductor 12 being arranged in the center of the cylindrical shape of said first channel 16. At least one inlet and one outlet (not shown in [Fig.l]) of the cooling fluid are provided in the first channel 16. The first channel 16 is configured to be traversed by the cooling fluid F so as to cool the electrical conductor 12 which heats up during operation. The cooling fluid F circulates all around the electrical conductor 12 in the first channel 16 so as to capture the thermal calories of the electrical conductor 12 during operation.

[0054] Each connector 300a, 300b performs an interface function between the cable 10 and the electrical equipment 410, 420. A connector 300a, 300b is both a fluid and an electrical connector. For example, the connector 300a, 300b may be a hydraulic connector of the “quick connect” type, which does not exhibit fluid losses during connection and disconnection of the cable 10 to the electrical equipment 410, 420.

[0055] Each connector 300a, 300b has at least one electrical interface 302 and at least one fluidic interface 304.

[0056] An electrical connection is made between the electrical conductor 12 of the cable 10 and the electrical interface 302 of the connector 300a, 300b and an electrical connection is made between the electrical interface 302 of the connector 300a, 300b and an electrical conductor 412, 422 of the electrical equipment 410, 420, represented by the double arrows E in [Fig.l]. The connector 300a, 300b thus makes it possible to electrically connect the cable 10 to the electrical equipment 410, 420.

[0057] A fluid connection is made between the first conduit 14 and the fluid interface 304 of each connector 300a, 300b. More precisely, the first channel 16 is fluidly connected to the connectors 300a, 300b (for example via orifices 30), so as to allow passage of the cooling fluid F from the first channel 16 to the connectors 300a, 300b (via their fluid interface 304). A fluid connection is also made between a connector 300a, 300b and a cooling circuit 414, 424 of the electrical equipment 410, 420 (for example via the orifices 416, 426), so as to allow passage of the cooling fluid F from the connector 300a, 300b to the electrical equipment 410, 420, in order to cool the electrical conductor 412, 422 in operation.

[0058] Thus, the cooling fluid F circulates in the first equipment 410, in the cable 10, in the connector 300a arranged between the first equipment 410 and the cable 10, in the second electrical equipment 420 and in the connector 300b arranged between the second equipment 420 and the cable 10. The cooling fluid F can circulate in one direction along the electrical equipment 410, 420, the connectors 300a, 300b and the cable 10. In this case, the return loop of the cooling fluid is external to the assembly. Alternatively, the cooling fluid F can circulate in a first direction, called the forward direction, along the electrical equipment 410, 420, the connectors 300a, 300b and the cable 10, as well as in a second direction, called the return direction, along these elements. In this case, the return loop of the cooling fluid can be external to the assembly or internal to the assembly and for example produced at one of the electrical equipment 410, 420.

[0059] The use of such an electrical cable 10 between two electrical equipments 410, 420 makes it possible to increase the passage of electrical current between the two electrical equipments, while maintaining correct dimensions and mass of the cable. Indeed, the cable does not heat up or heats up little during operation, since it is cooled by means of the cooling fluid, which makes it possible to avoid overheating of the cable or the electrical equipments, and therefore to optimize the transfer of electrical energy between the electrical equipments (for example to optimize the recharging of an electrical equipment). The cooling circuit is thus partly directly integrated into the cable, and possibly into the electrical equipments, to optimize the heat dissipation of the assembly of electrical equipments and electric cable, which heat up during operation.

[0060] Of course, the cooling fluid F can circulate in the cable 10 and / or in at least one of the connectors 300a, 300b, and / or in at least one of the electrical equipment 410, 420, depending on the configuration of the system and the desired cooling requirement. These different configurations are described in more detail in the remainder of the description.

[0061] The inlet and outlet of the cooling fluid are not shown in [Fig.l], but may be located along the entire cooling circuit 414, 424 of an electrical equipment 410, 420, or on one of the connectors 300a, 300b, or along the cable 10. In a non-limiting manner, a single cooling circuit common to the cable 10, to the connectors 300a, 300b and to the electrical equipment 410, 420 is shown here, but of course separate cooling circuits may be produced.

[0062] [Fig.2A] represents an embodiment of a flying vehicle, such as an eVTOL aircraft, placed on a charging platform, with a view to recharging its rechargeable batteries by means of an electrical assembly, for example also called a charging assembly, comprising a cable, called a charging cable, and a connector having an interface function between said cable and the flying vehicle.

[0063] A flying vehicle 100 is represented very schematically in dotted lines, and comprises at least one rechargeable battery 102, as well as a battery management system 104 (also known by the acronym BMS for “Battery Management System” in English). The battery management system 104 allows the control and charging of the various elements of the batteries of the flying vehicle 100.

[0064] The flying vehicle 100 is placed on a loading platform 200, which comprises an electrical energy source 202 electrically connected to the cable 10 and intended to transmit electrical energy to the flying vehicle 100, via the cable 10.

[0065] The cable 10 is electrically and fluidically connected to the flying vehicle 100, in order to recharge the batteries 102 of said flying vehicle, by means of a connector 300. The connector 300 has an interface function between the cable 10 and the flying vehicle whose batteries are to be recharged. For example, the connector 300 may be a hydraulic connector of the “quick connect” type which does not have fluid losses during connection and disconnection to the flying vehicle. This connector 300 can thus be advantageously used to limit the interventions of operators on the ground when recharging the batteries of the flying vehicle.

[0066] [Fig.2B] shows more precisely the charging cable 10 for recharging the batteries of the flying vehicle. Of course, this cable is not limited to being used for recharging an eVTOL aircraft, but can be used for other electrical cable applications or for other types of flying vehicles. For example, the cable 10 can be a connection cable between two electrical devices.

[0067] The cable 10 extends longitudinally in a longitudinal direction X, between a first end 10a and a second end 10b, and radially to the longitudinal direction X in the radial Y and vertical Z directions. In this figure, only a part of the cable 10 is shown, said cable 10 possibly being longer in its longitudinal direction X.

[0068] The cable 10 is flexible, that is to say slightly flexible, ie non-rigid, so as to be easily connected to the flying vehicle 100 by an operator.

[0069] The cable 10 comprises an electrical conductor 12 electrically connected to the electrical energy source 202 in order to be able to transmit the electrical energy from the electrical energy source 202 to the rechargeable batteries 102 of the flying vehicle 100, and to recharge them.

[0070] The cable 10 also comprises a first cylindrical conduit 14 arranged circumferentially around the electrical conductor 12. The first and second partitions of the first conduit 14 are numbered 15a, 15b in [Fig. 3]. An inlet FE for the cooling fluid is provided at a first end 16a of the first channel 16, which is arranged substantially at the level of the first end 10a of the cable 10, for example at the level of the external wall 14e of the first conduit 14, and an outlet Fs for the cooling fluid is provided at a second end 16b of the first channel 16, which is arranged substantially at the second end 10b of the cable 10, for example at the external wall 14e of the first conduit 14. The inlet FE and outlet Fs of the cooling fluid may take the form of through-orifices between the outside and the inside of the first channel 16 (the inside of the first channel 16 being defined as the volume between the first internal and external walls 14i, 14e of the first conduit 14). Of course, the cable 10 may comprise a plurality of inlets and / or a plurality of outlets of the cooling fluid. Thus, the cooling fluid F circulates all around the electrical conductor 12 between the first and second ends 16a, 16b of the first channel 16 in a first direction only (represented by the arrows F in FIGS. 2A and 2B) so as to capture the thermal calories of the electrical conductor 12 in operation.The cooling fluid F can circulate substantially linearly in the first channel 16, or substantially helical in the first channel 16 around the electrical conductor 12. The return loop of the cooling fluid is produced outside the first conduit 14, that is to say that the cooling fluid F only travels through the first conduit 14 to capture the thermal calories of the electrical conductor 12.

[0071] According to one configuration, the cooling fluid F can also pass through the connector 300, circulating through passages 310 arranged at the fluidic interface 304 between the cable 10 and the connector 300 so as to also cool the connector 300. As an alternative to the outlet Fs of the cooling fluid which is present at the end 16b of the first channel 16, an outlet of the cooling fluid F can be provided in the connector 300.

[0072] According to another configuration, the cooling fluid F can also pass through the batteries 102 and the battery management system 104, circulating in a cooling circuit (not shown in [Fig.2A]) of the flying vehicle 100. Passages of the cooling fluid (not shown in [Fig.2A]) are then arranged at the fluid interface between the connector 300 and the cooling circuit of the flying vehicle 100. As an alternative to the outlet Fs of the cooling fluid which is present at the end 16b of the first channel 16, an outlet of the cooling fluid F can be provided on the flying vehicle 100.

[0073] The loading platform 200, shown in [Fig.2A], also comprises a cooling device 220 comprising a fluid reservoir 204 fluidically connected to cooling means 212 of the fluid contained in the reservoir 204, via a pipe 216, so as to supply the cooling fluid F. The cooling means 212 make it possible to cool the fluid which has possibly already been heated along the electrical conductor 12, before being reintroduced into the fluid reservoir 204. The cooling fluid F may be in liquid or gaseous form. The cooling device 220 also comprises means for putting under pressure 206 of the cooling fluid F, for example a pump, fluidically connected to the cooling means 212 via a pipe 208 and to the inlet Fe of the cooling fluid in the cable 10 via a pipe 210. The pressurizing means 206 have the function of pressurizing the cooling fluid, in order to send and allow the circulation of the cooling fluid F in the first channel 16 of the cable 10. After having traveled through the first conduit 14, circulating all around the electrical conductor 12, the cooling fluid, heated by the electrical conductor 12 in operation, leaves the first conduit 14 through the outlet Fs of the cable 10. The cooling fluid outlet Fs is connected to the reservoir 204 via a pipe 214, so as to allow a return of the cooling fluid to the reservoir 204 and to have a closed-loop fluid circuit.

[0074] This cable 10 is thus equipped with cooling means (the first conduit 14) configured to cool the electrical conductor 12 which heats up during the charging of the batteries 102 of the flying vehicle 100. In operation of the cable 10, the cooling fluid F, having a temperature lower than the temperature of the electrical conductor 12, has a heat exchange with the electrical conductor 12, and more precisely the cooling fluid F captures the thermal calories emitted by the electrical conductor 12, which allows it to be cooled. The cooling fluid F heated by the electrical conductor 12 is then cooled by the cooling means 212, before being sent again to the thermal contact of the electrical conductor 12 in order to cool it.

[0075] According to one configuration, the cooling fluid F is a single-phase fluid, for example in the liquid state. The single-phase cooling fluid may be water, a water-ethylene glycol mixture, a refrigerant fluid (of the R-134a or HFC-134a type (for 1,1,1,2-tetrafluoroethane) or other) or any type of fluid called “thermal fluid” (Therminol®-LT type or a fluid from the Dowtherm™ series).

[0076] According to another configuration, the cooling fluid F is a two-phase fluid, configured to gradually pass from a first state, for example from a liquid state, to a second state, for example a gaseous state, in contact with the electrical conductor 12 which heats up during operation. The reservoir 204 contains the cooling fluid in its second state and the cooling fluid passes from its first state to its second state in thermal contact with the electrical conductor 12. The cooling means 212 are then configured to pass the cooling fluid from its second state to its first state, before sending it into the cable 10.The two-phase cooling fluid can be water, a water-ethylene glycol mixture, a refrigerant (of the R-134a type or other), any type of fluid called “thermal fluid” (Therminol®-LT type or a fluid from the Dowtherm™ series) or any type of fluid that accepts repeated phase changes.

[0077] According to one configuration, the first conduit 14 is produced by extrusion, and is then inserted around the electrical conductor 12.

[0078] According to another configuration, the first conduit 14 and the electrical conductor 12 are produced by co-extrusion. More precisely, the electrical conductor 12 is extruded into the first conduit 14 in order to obtain the cable 10. The production of the cable 10 by co-extrusion advantageously makes it possible to produce several layers of said cable simultaneously.

[0079] Figures 3 and 4 represent another embodiment of a cable 10, in which the first conduit 14 comprises a first channel 16 and a second channel 26 for circulation of the cooling fluid F.

[0080] The second channel 26 comprises a first end 26a, arranged substantially at the level of the first end 10a of the cable 10, and a second end 26b, arranged substantially at the level of the second end 10b of the cable 10. At least one orifice 28 for the passage of the cooling fluid is provided between the second ends 16b, 26b of the channels 16, 26 so as to fluidly connect the first channel 16 to the second channel 16. Of course, the second ends 16b, 26b of the channels 16, 26 can be fluidly connected by means of a plurality of orifices for the passage of the cooling fluid. The outlet Fs of the cooling fluid is arranged at the first end 26a of the second channel 26, for example at the first partition 15a, so that the cooling fluid travels, after having traveled the first channel 16 over its entire length, the second channel 26 from its second end 26b to its first end 26a.

[0081] Thus, the cooling fluid circulates between the first and second ends 16a, 16b of the first channel 16 in a first direction (represented by the arrow F1 in FIGS. 3 and 4) so ​​as to capture the thermal calories of the electrical conductor 12 in operation, then circulates between the second and first ends 26b, 26a of the second channel 26 in a second direction, opposite to the first direction (represented by the arrow F2 in FIGS. 3 and 4). When the cooling fluid circulates in the second channel 26, it has already been heated by the electrical conductor 12 during its circulation in the first channel 16, but continues to cool the electrical conductor 12, even if this is done less efficiently along the second channel 26 (the cooling fluid is at a temperature which remains lower than the heating temperature of the electrical conductor).The return loop of the cooling fluid is thus produced in the cable 10, at the end 10b of the cable which is connected to the connector 300. This configuration makes it possible to have the inlet Fe and the outlet Fs of the cooling fluid close to each other, which simplifies the cooling system.

[0082] According to one configuration, the cooling fluid F can also travel through the connector 300, the return loop of the cooling fluid is thus produced in the connector 300.

[0083] According to another configuration, the cooling fluid F can also travel through a cooling circuit of the flying vehicle 100, so as to cool the batteries 102 and the battery management system 104, the return loop of the cooling fluid is thus produced in the flying vehicle 100.

[0084] [Fig. 5] shows another embodiment of a cable 10, where the cable 10 comprises a first conduit 14 in which a plurality of first channels 116 and a plurality of second channels 126 for circulating the cooling fluid F are delimited. In [Fig. 5], three first channels 116 and three second channels 126 are shown, but the first conduit can of course comprise more or less than three first and second channels. The first channels 116 are arranged adjacent to each other, and the second channels 126 are arranged adjacent to each other, so that the plurality of first channels 116 is arranged adjacent to the plurality of second channels 126. The first and second channels 116, 126 thus form a ring of channels around the electrical conductor 12.

[0085] The plurality of first channels 116 are fluidly connected to the cooling fluid inlet FE such that the cooling fluid flows through each first channel 116 simultaneously. The plurality of first channels 116 are fluidly connected to the plurality of second channels 126. The plurality of second channels 126 are fluidly connected to the cooling fluid outlet Fs, and the cooling fluid flows through each second channel 126 simultaneously.

[0086] Thus, the cooling fluid circulates in each first channel 116 in a first direction (represented by the arrow F1 in [Fig.5]) so as to capture the thermal calories of the electrical conductor 12 in operation, then circulates in each second channel 126 in a second direction, opposite to the first direction (represented by the arrow F2 in [Fig.5]).

[0087] According to one configuration, the first channels 116 are fluidically connected to each other, at the inlet FE of the cooling fluid, by a connection zone of the first channels 116, so that the cooling fluid F is sent from the inlet FE into the connection zone of said first channels 116, then circulates simultaneously in each first channel 116. The first channels 116 are fluidically connected to each other, at the second end 14b of the first conduit 14, by a receiving zone of the cooling fluid, so as to receive the cooling fluid F coming from the first channels 116. The second channels 126 are fluidically connected to each other, at the second end 14b of the first conduit 14, by a connection zone of the second channels 126, so that the cooling fluid F is sent from the receiving area of ​​the first channels 116 into the connection area of ​​the second channels 126, then circulates simultaneously in each second channel 126. The second channels 126 are fluidically connected to each other, at the level of the outlet Fs of the cooling fluid, by a receiving area of ​​the cooling fluid, so as to receive the cooling fluid from the second channels 126, before the cooling fluid is ejected from the cable 10 through the outlet Fs.

[0088] According to another configuration, at the second end 14b of the first conduit 14, each first channel 116 is fluidically connected to a second channel 126, so that the cooling fluid F circulates simultaneously in each first channel 116, then in each second channel 126. Each first channel 116 is thus fluidically connected to a second channel 126, as shown in [Fig.5]. The fluidic connection of the first channels 116 to the second channels 126 can be distributed according to an axial symmetry, or according to the distance between two channels.

[0089] [Fig. 6] represents a variant of the cable 10 of [Fig. 5]. According to this variant, the first channels 116 are arranged alternately with the second channels 126. A first channel 116 is thus fluidically connected, at the level of the second end 14b of the first conduit 14, to a second channel 126 which is adjacent to it.

[0090] Figures 7 and 8 show an embodiment of an electrical assembly comprising a cable 10 and a connector 300. The second end 10b of the cable 10 is fluidly and electrically connected to the connector 300. An electrical connection is made between the second end 12b of the electrical conductor 12 and the electrical interface 302 of the connector 300, represented by the arrow E in [Fig.8]. A fluid connection is made between the second end 14b of the first conduit 14 and the fluid interface 304 of the connector 300.

[0091] The inlet FE of the cooling fluid is arranged at the first end 16a of the first channel 16, so that the cooling fluid flows through the first channel 16 from its first end 16a to its second end 16b. The second end 16b of the first channel 16 is fluidically connected to the connector 300 (for example via an orifice 30 provided at the fluidic interface 304, shown in [Fig. 8], at the second partition 15b facing the connector 300), so as to allow passage of the cooling fluid F from the first channel 16 to the connector 300. The connector 300 is fluidically connected to the second end 26b of the second channel 26 (for example via an orifice 32 provided at the fluidic interface 304, shown in [Fig. 8], at the second partition 15b facing the connector 300), so as to allow passage of the cooling fluid F from the connector 300 to the second channel 26. The output Fs of the cooling fluid is provided at the first end 26a of the second channel 26, so that the cooling fluid travels, after having traveled the first channel 16 over its entire length and the connector 300, the second channel 26 from its second end 26b to its first end 26a. The return loop of the cooling fluid is thus produced in the connector 300.

[0092] Thus, the cooling fluid circulates in the first channel 16 in a first direction (represented by the arrow F1 in FIGS. 7 and 8) so as to capture the thermal calories of the electrical conductor 12 in operation, then circulates in the connector 300 so as to capture the thermal calories of the connector 300 resulting from heating due to the contact resistance, then circulates in the second channel 26 in a second direction, opposite to the first direction (represented by the arrow F2 in FIGS. 7 and 8).

[0093] [Fig. 9] shows another embodiment of a cable 10, in which the cable 10 also comprises a second cylindrical conduit 24 arranged circumferentially around the first conduit 14. The first conduit 14 and the second conduit 24 are coaxial. The second conduit 24 extends longitudinally in the longitudinal direction X, between a first end 24a and a second end 24b. The second conduit 24 is delimited longitudinally between a first partition 25a and a second partition 25b in the form of rings, and radially between a second internal wall 24i and a second external wall 24e, between which a second channel 26 for circulating a cooling fluid F is formed. The second internal 24i and external 24e walls are connected to each other, at the ends 24a, 24b, by the first and second partitions 25a, 25b.The second channel 26 has a general shape of a hollow cylinder, the first channel 16 being arranged in the center of the cylindrical shape of said second channel 26.

[0094] An inlet FE of the cooling fluid is provided at a first end 16a of the first channel 16, for example at the first partition 15a of the first conduit 14, and an outlet Fs of the cooling fluid is provided at the first end 26a of the second channel 26, for example at the first partition 25a of the second conduit 24 or at the external wall 24e of the second conduit 24. The inlet FE of the cooling fluid may take the form of one or more through-orifices between the outside and the inside of the first channel 16. The outlet Fs of the cooling fluid may take the form of one or more through-orifices between the outside and the inside of the second channel 26 (the inside of the second channel 26 being defined as the volume between the second internal and external walls 24i, 24e of the second conduit 24).

[0095] One or more orifices 34 (two orifices 34 are shown in [Fig.9]) are provided between the external wall 14e of the first conduit 14 and the internal wall 24i of the second conduit 24, so as to fluidly connect the first channel 16 and the second channel 26. Thus, the cooling fluid F circulates all around the electrical conductor 12 along the length (along the longitudinal direction X) of the first channel 16 in a first direction (represented by the arrows F1 in [Fig.9]) so as to capture the thermal calories of the electrical conductor 12 in operation, then circulates around the first conduit 14, in the second channel 26 in a second direction opposite to the first direction (represented by the arrows F2 in [Fig.9]). The return loop of the cooling fluid is thus produced in the cable 10. The first channel 16 forms a first cooling ring around the electrical conductor 12, and the second channel 26 forms a second cooling ring around the electrical conductor 12.The cooling fluid which circulates in the first channel 16 thus forms a “cold” loop, while the cooling fluid which circulates in the second forms a “hot” loop (the fluid having been heated during its circulation in the first channel 16 by the electrical conductor 12 in operation).

[0096] Of course, the inlet FE and outlet Fs of the cooling fluid can be reversed so that the cooling fluid circulates firstly in the second conduit 26 (conduit radially furthest from the electrical conductor 12), then in the first conduit 14 (conduit radially closest to the electrical conductor 12).

[0097] [Fig. 10] shows another embodiment of a cable 10, in which the cable 10 comprises a first conduit 14 having a plurality of first channels 116 and a second conduit 24 having a plurality of second channels 126 for circulating the cooling fluid F. In [Fig. 10], eight first channels 116 and twelve second channels 126 are shown, but the first conduit may of course comprise more or less than eight first channels and the second conduit may comprise more or less than twelve second channels. The first and second conduits 14, 24 may comprise a different number of channels, as shown in [Fig. 10], or the same number of channels. The first channels 116 thus form a first ring for circulating the cooling fluid around the electrical conductor 12, while the second channels 126 form a second ring for circulating the cooling fluid around said first ring..

[0098] The plurality of first channels 116 of the first conduit 14 is fluidically connected to a cooling fluid inlet FE such that the cooling fluid passes through each first channel 116 simultaneously. The plurality of first channels 116 is fluidically connected to the plurality of second channels 126 such that the cooling fluid having passed through each first channel 116 passes then each second channel 126. The plurality of second channels 126 of the second conduit 24 is fluidically connected to a cooling fluid outlet Fs so that the cooling fluid passes through each second channel 126 simultaneously before exiting the cable 10.

[0099] According to one configuration, the first and second conduits 14, 24 of the cable 10 are produced by co-extrusion. More precisely, the first conduit 14 (as well as the first channels 116) is extruded into the second conduit 24 (and therefore in the center of the second channels 126) in order to obtain the cooling means of the cable 10. The first and second conduits 14, 24 thus co-extruded are then inserted around the electrical conductor 12. The co-extrusion makes it possible to obtain the first and second conduits 14, 24 arranged coaxially with each other, as well as with the electrical conductor 12, and optionally with materials different from each other. When producing the cable by co-extrusion, and therefore by depositing several layers simultaneously, the nature of the polymer used for the first and second conduits is similar.However, for one and / or the other of the first and second conduits, fillers may be added to the polymer so as to improve the thermal conductivity for example. A non-limiting example of cable 10 produced by co-extrusion comprises a layer of fluoropolymer loaded with carbon black (semiconductor layer), an insulating layer of fluoropolymer and a final semiconductor layer.

[0100] [Fig. 11] shows another embodiment of an electrical assembly comprising a cable 10 and a connector 300. The second end 10b of the cable 10 is electrically and fluidically connected to the connector 300. An electrical connection is made between the second end 12b of the electrical conductor 12 and the electrical interface 302 of the connector 300, represented by the arrow E in [Fig.l 1]. A fluidic connection is made between the second end 14b of the first conduit 14 and the fluidic interface 304 of the connector 300, as well as between the fluidic interface 304 of the connector 300 and the second end 24b of the second conduit 24.

[0101] The inlet FE of the cooling fluid is arranged at the first end 16a of the first channel 16, so that the cooling fluid flows through the first channel 16 from its first end 16a to its second end 16b. The second end 16b of the first channel 16 is fluidically connected to the connector 300 (for example via orifices 30 arranged at the fluidic interface 304, shown in [Fig. 11], at the second partition 15b opposite the connector 300), so as to allow passage of the cooling fluid F from the first channel 16 to the connector 300. The connector 300 is fluidically connected to the second end 26b of the second channel 26 (for example via orifices 32 arranged at the fluidic interface 304, shown in [Fig. 11], at the level of the second partition 25b opposite the connector 300), so as to allow passage of the cooling fluid F from the connector 300 to the second channel 26. The outlet Fs of the cooling fluid is arranged at the level of the first end 26a of the second channel 26, so that the cooling fluid flows through the second channel 26 from its second end 26b to its first end 26a. The return loop of the cooling fluid is thus produced in the connector 300.

[0102] The cooling fluid then circulates in the first channel 16 in a first direction (represented by the arrows F1 in [Fig. 11]) so as to capture the thermal calories of the electrical conductor 12 in operation, then circulates in the connector 300 so as to capture the thermal calories of the connector 300 resulting from heating due to the contact resistance, then circulates in the second channel 26 in a second direction, opposite to the first direction (represented by the arrows F2 in [Fig. 11]).

[0103] [Fig. 12] shows an embodiment of a cable 10, a connector 300 and a cooling circuit 106 of the batteries 102 and a battery management system 104 of a flying vehicle 100.

[0104] The cable 10 is electrically and fluidically connected to the connector 300, which is electrically and fluidically connected to the flying vehicle 100. An electrical connection is made between the electrical conductor 12 of the cable 10 and a first electrical interface 302a of the connector 300, then between a second electrical interface 302b of the connector 300 and the batteries 102 and the battery management system 104 of the flying vehicle 100, represented by the arrows E in [Fig. 12].

[0105] A fluid connection is made between the first channel 16 of the first conduit 14 and a first fluid interface 304a of the connector 300, between a second fluid interface 304b of the connector 300 and the cooling circuit 106, and between the first fluid interface 304a of the connector 300 and the second channel 26 of the first conduit 14.

[0106] The cooling fluid F circulates in the first channel 16 from the inlet FE of the cooling fluid to the connector 300 (fluid connection between the first channel and the connector made via an orifice 30 of the first fluid interface 304a, shown in [Fig. 12]). The cooling fluid then circulates in the connector 300 between the first and second fluid interfaces 304a, 304b. The connector 300 is fluidically connected to an inlet 106a of the cooling circuit 106 of the flying vehicle 100, for example via an orifice 36 of the second fluid interface 304b, so that the connector 300 is crossed by the cooling fluid F. The cooling fluid then circulates in the cooling circuit 106 of the flying vehicle 100, around the batteries 102 and the cooling system battery management system 104, or between said batteries or through said batteries, so as to cool them. The cooling circuit 106 is arranged in contact with, or near, or passes through said batteries 102 and the battery management system 104, so as to optimize the cooling of the latter by limiting the distance between the cooling source and the element to be cooled. An outlet 106b of the cooling circuit 106 of the flying vehicle 100 is fluidically connected to the connector 300 (for example via an orifice 38 of the second fluidic interface 304b, shown in [Fig. 12]), so as to allow a return of the cooling fluid F from the cooling circuit 106 to the connector 300. The connector 300 is again passed through by the cooling fluid F.The connector 300 is fluidically connected to the second end 26b of the second channel 26 (for example via orifices 32 of the first fluidic interface 304a, shown in [Fig. 12]), so as to allow passage of the cooling fluid F from the connector 300 to the second channel 26. The cooling fluid then circulates in the second channel 16 to the cooling fluid outlet Fs. The return loop of the cooling fluid is thus produced in the cooling circuit 106 of the flying vehicle 100. The loop of the cooling fluid F is extended to the flying vehicle 100, to include the batteries 102 and the battery management system 104. The cooling fluid F thus also circulates in the batteries 102 to be recharged, which makes it possible to optimize the recharging of said batteries by avoiding heating of the cells composing said batteries.

[0107] According to one configuration, the flying vehicle may incorporate a preconditioning function for its batteries. This function consists of preheating the batteries to a predetermined temperature allowing faster charging than without preheating, without prematurely destroying said batteries. This battery preconditioning function, as well as the recharging of the batteries, imposes strong sizing constraints on the cooling systems of said batteries. The cooling fluid loop being extended to the flying vehicle, to include the batteries and the battery management system, makes it possible not to oversize the heat exchangers and the scoops of the flying vehicle, which makes it possible to reduce the weight of said flying vehicle.

[0108] [Fig. 13] shows another embodiment of a fluidly connected cable 10 electrically and electrically to a connector 300, itself fluidically connected to a cooling circuit 106 of the batteries 102 and of a battery management system 104 of a flying vehicle 100 and electrically to said batteries 102 and to said battery management system 104.

[0109] An electrical connection is made between the electrical conductor 12 of the cable 10, the connector 300 and the batteries 102 and the battery management system 104 of the flying vehicle 100, represented by the arrows E in [Fig. 12].

[0110] A fluid connection is made between the first channel 16 of the first conduit 14 and the connector 300 and the cooling circuit 106, as well as between the cooling circuit 106, the connector 300 and the second channel 26 of the second conduit 24.

[0111] The cooling fluid flows through the first channel 16 of the first conduit 14 from the inlet FE to the second end 16b of the first channel. The second end 16b of the first channel 16 is fluidically connected to the connector 300 (for example via an orifice 30 of the first fluidic interface 304a, shown in [Fig. 13]), so as to allow passage of the cooling fluid F from the first channel 16 to the connector 300. The connector 300 is fluidically connected to an inlet 106a of the cooling circuit 106 of the flying vehicle 100, for example via an orifice 36 of the second fluidic interface 304b, so that the connector 300 is crossed by the cooling fluid F. The cooling fluid then circulates in the cooling circuit 106 of the flying vehicle 100, around the batteries 102 and the battery management system 104, so as to cool them.An outlet 106b of the cooling circuit 106 of the flying vehicle 100 is fluidically connected to the connector 300 (for example via an orifice 38 of the second fluidic interface 304b, shown in [Fig. 13]), so as to allow a return of the cooling fluid F from the cooling circuit 106 to the connector 300. The connector 300 is fluidically connected to the second end 26b of the second channel 26 (for example via orifices 32 of the first fluidic interface 304a, shown in [Fig. 13]), so as to allow a passage of the cooling fluid F from the connector 300 to the second channel 26, and up to the outlet Fs of the cooling fluid.

[0112] The cooling fluid circulates in a “forward” direction (represented by the arrows F1 in [Fig. 13]) in the first channel 16 of the cable 10, and in the connector 300, and in a “return” direction (represented by the arrows F2 in [Fig. 13]) in the connector 300 and in the second channel 26 of the cable 10. The return loop of the cooling fluid is produced in the cooling circuit 106 of the flying vehicle 100.

[0113] According to an application shown in [Fig. 14], a flying vehicle 100, of the eVTOL aircraft type, comprises at least one rechargeable battery 102 (two batteries 102 are shown in [Fig. 14]) and a battery management system 104 configured to regulate the charging of the batteries 102.

[0114] The charging platform 200, also called a charging base, is configured to recharge the rechargeable batteries 102 of the flying vehicle 100. The charging platform 200 comprises a cable 10 electrically connected to the electrical power source 202 (which may not be incorporated in the charging platform 200). The electrical connection of the cable 10 to the flying vehicle 100 is carried out by means of the connector 300.

[0115] In order to compensate for the heating of the electrical conductor 12 of the cable 10, the latter is equipped with means for cooling said electrical conductor 12. Thus, the loading platform 200 comprises the cooling device 220, configured to cool the cooling fluid and send it into the cable 10 to circulate around the electrical conductor 12, so as to capture the thermal calories from the electrical conductor 12.

[0116] Of course, the invention is not limited to this application.

[0117] [Fig. 15] represents the different steps of a method for charging at least one rechargeable battery 102 of a flying vehicle 100 by means of a charging platform 200 described previously, and in particular a charging cable 10 as described previously.

[0118] Once the flying vehicle 100 is placed on the loading platform 200, a ground operator proceeds to electrically connect the cable 10 to the flying vehicle 100 (step E10), using the connector 300 which is electrically and fluidically connected to the cable 10 so as to electrically connect the electrical energy source 202 to the batteries 102. The connector 300 is electrically connected, directly or indirectly, to the batteries 102 of the flying vehicle 100 so as to recharge them. The battery management system 104 controls the charge level of the batteries while they are being charged.

[0119] During the charging of the batteries 102 of the flying vehicle 100 (step E20), electrical energy is transmitted from the electrical energy source 202 to the batteries 102 via the electrical conductor 12 of the cable 10 and the connector 300.

[0120] In parallel with the step E20 of recharging the batteries, the method comprises a cooling step E30 during which the electrical conductor 12 of the cable 10, which heats up during the charging of the batteries 102, is cooled by a cooling fluid F, which circulates in the first channel 16, and possibly in the second channel 26, of the cable 10. This cooling step E30 is carried out simultaneously with the step E20 of recharging the batteries 102. Indeed, during operation, the electrical conductor 12 heats up and the thermal calories generated by the electrical conductor 12 are then captured by the cooling fluid F.

[0121] The various embodiments and configurations presented here can of course be combined, but have not all been described in combination for reasons of brevity.

[0122] The choice of one or other of these configurations or one or other of these embodiments can be made according to the levels of electrical power to be transferred via the electrical cable, the compactness, the flexibility and the bending radius of the electrical cable desired.

Claims

Claims

1. Electrical cable (10), said electrical cable (10) extending in a longitudinal direction (X), and comprising: - an electrical conductor (12) extending in the longitudinal direction (X), and - a first conduit (14) extending in the longitudinal direction (X) and being delimited radially to the longitudinal axis (X) by a first internal wall (14i) and a first external wall (14e) so as to define at least a first channel (16) between said first internal and external walls, said first conduit (14) being arranged circumferentially around said electrical conductor (12), said first channel (16) being configured to be traversed by a cooling fluid (F).

2. An electrical cable (10) according to claim 1, wherein the first conduit (14) is delimited radially to the longitudinal axis (X) by said first inner and outer walls (14i, 14e) so as to define at least first and second channels (16, 26) between said first inner and outer walls, said first channel (16) being fluidically connected to said second channel (26), said first channel (16) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a first direction (F1), and said second channel (26) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a second direction (F2) opposite to said first direction (F1).

3. An electrical cable (10) according to one of claims 1 or 2, wherein the first conduit (14) is delimited radially to the longitudinal axis (X) by said first inner and outer walls (14i, 14e) so as to define a plurality of first and second channels (116, 126) between said first inner and outer walls, said first channels (116) being alternated with said second channels (126) circumferentially around the electrical conductor (12), said first channels (116) being fluidically connected to said second channels (126), said first channels (116) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a first direction (Fl), and said second channels (126) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a second direction (F2) opposite to said first direction (Fl).

4. An electrical cable (10) according to claim 1, also comprising a second conduit (24) extending in the longitudinal direction (X) and being delimited radially to the longitudinal axis (X) by a second inner wall (24i) and a second outer wall (24e) so as to define at least one second channel (26) between said second inner and outer walls, said second conduit (24) being arranged circumferentially around said first conduit (14), said first channel (16) being fluidically connected to said second channel (26), said first channel (16) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a first direction (F1), and said second channel (26) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a second direction (F2) opposite to said first direction (F1).

5. An electrical cable (10) according to claim 4, wherein the first conduit (14) is delimited radially to the longitudinal axis (X) by said first inner and outer walls (14i, 14e) so as to define a plurality of first channels (116) between said first inner and outer walls, the second conduit (24) is delimited radially to the longitudinal axis (X) by said second inner and outer walls (24i, 24e) so as to define a plurality of second channels (126) between said second inner and outer walls, said first channels (116) being fluidically connected to said second channels (126), said first channels (116) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a first direction (Fl),and said second channels (126) being configured to be traversed by the cooling fluid (F) in the longitudinal direction (X) in a second direction (F2) opposite to said first direction (F1).,

6. Electrical assembly comprising an electrical cable (10) according to one of claims 2 to 5, the or each first channel (16, 116) having a first inlet (FE) and a first outlet (30) for the cooling fluid (F) and the or each second channel (26, 126) having a second inlet (32) and a second outlet (Fs) for the cooling fluid, said electrical assembly also comprising a connector (300, 300a, 300b) comprising a first electrical interface (302, 302a, 302b) electrically connected to the electrical conductor (12) of the electrical cable (10) and a second fluidic interface (304, 304a, 304b) fluidically connected to the first outlet (30) of said or each first channel (16, 116) and to the second inlet (32) of said or each second channel (26, 126) of the electrical cable (10) so that the first and second channels (16, 116, 26, 126) of the electrical cable (10) and the connector (300, 300a, 300b) are traversed by the cooling fluid (F).

7. Electrical assembly according to the preceding claim, wherein the second fluidic interface (304, 304a, 304b) is configured to fluidically connect the first output (30) of said or each first channel (16, 116) to the second input (32) of said or each second channel (26, 126) of the electrical cable (10).

8. Flying vehicle (100) comprising at least one electrical equipment (410, 420, 102) and at least one electrical assembly according to one of claims 6 or 7, the first electrical interface (302, 302a, 302b) of the connector (300, 300a, 300b) of the electrical assembly being electrically connected to said electrical equipment (410, 420, 102).

9. A flying vehicle (100) according to claim 8, also comprising a cooling circuit (106), and wherein the second fluidic interface (304, 304a, 304b) of the connector (300, 300a, 300b) of the electrical assembly is fluidically connected to said cooling circuit (106).

10. A loading platform (200) comprising: - an electrical assembly according to claim 6, - an electrical energy source (202) electrically connected to the electrical conductor (12) of the electrical cable (10), - a fluid reservoir (204), fluidly connected to the second output (Fs) of the electrical cable (10), - cooling means (212) fluidly connected to the reservoir (204) and configured to cool the fluid of said reservoir (204) so ​​as to obtain a cooling fluid (F), - pressurizing means (206) fluidly connected to the cooling means (212) and to the first inlet (FE) of the electric cable (10), and configured to pressurize the cooling fluid (F) and to send the cooling fluid (F) into circulation in the electric cable (10).

11. A method of charging at least one rechargeable battery (102) of a flying vehicle (100) by means of a charging platform (200) according to claim 10, said method comprising: - an electrical connection step (E10) during which the connector (300) is electrically connected to the battery (102) of the flying vehicle (100), - a recharging step (E20) during which electrical energy is transmitted from the electrical energy source (202) to said battery (102) by means of the electrical conductor (12) of the electrical cable (10), and - a cooling step (E30) during which the cooling fluid (F) circulates in the first channel (16) of the electric cable (10).

12. Charging method according to the preceding claim, in which the recharging step (E20) and the cooling step (E30) are simultaneous.

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