Isolated high-voltage liquid-cooled charging harness

Abstract

The application belongs to the field of new energy liquid charging equipment, and specifically discloses an isolated high-voltage liquid cooling charging wire harness, which comprises a high-voltage connector and a charging seat, and a liquid cooling wire is arranged between the high-voltage connector and the charging seat; the liquid cooling wire comprises a first liquid cooling wire and a second liquid cooling wire; the first liquid cooling wire and the second liquid cooling wire are of the same structure and each comprises an insulating layer, a conductor arranged on the inner side of the insulating layer, and a flow guide pipe arranged on the inner side of the conductor; the first liquid cooling wire is internally provided with a first liquid cooling pipe, the second liquid cooling wire is internally provided with a second liquid cooling pipe, the first liquid cooling pipe and the second liquid cooling pipe are connected at one end of the charging seat, one end of the first liquid cooling pipe close to the high-voltage connector is connected with a first liquid cooling flow guide pipe, one end of the second liquid cooling pipe close to the high-voltage connector is connected with a second liquid cooling flow guide pipe, and the first liquid cooling pipe and the second liquid cooling pipe are internally filled with liquid cooling medium; the liquid cooling directly conducts heat to cooling liquid, has high heat dissipation efficiency, remarkable cooling, and prolongs the service life of the charging system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of charging wires, and particularly relates to an isolated high-voltage liquid-cooled charging wire harness. BACKGROUND

[0002] With the promotion of electrification, the endurance mileage of new energy vehicles has become a key concern of users. The methods to improve the endurance mileage include expanding the battery pack and improving the charging efficiency to shorten the charging time. Improving the charging efficiency has become one of the important means of economy.

[0003] To improve the charging efficiency and shorten the charging time, the charging current needs to be improved. The improvement of the current will cause the increase of the wire diameter of the charging wire harness, and a large amount of heat will be generated in the cable and the connecting joint, resulting in the increase of the temperature. It is easy to cause the failure of the conductor and the surrounding connecting parts and fixing parts due to high temperature, thereby affecting the normal use of various devices in the vehicle shell. At present, the liquid cooling technology for the charging wire is not mature, and only the cooling medium is simply combined with the wire, but the fixed wire harness from the charging seat to the battery pack is bundled with the vehicle frame. However, when charging, different charging piles with different charging powers are used. When a fast charging pile with a large power charger is used, more heat is generated in the wire harness, and the wire harness needs to be cooled more efficiently. The ordinary liquid-cooled wire harness cannot achieve the purpose of rapid cooling. When the ordinary charging pile is used for charging, the use of the fast liquid cooling method and the increase of the liquid cooling flow rate will increase the driving energy consumption of the cooling medium. Therefore, a high-voltage liquid-cooled wire harness capable of charging according to different charging powers is needed.

[0004] At present, simple liquid cooling has been realized between the charging pile and the charging gun. The present scheme is a liquid-cooled charging wire harness from the charging seat to the battery pack. The two are combined together to form a complete liquid-cooled charging circuit to improve the charging efficiency. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide an isolated high-voltage liquid-cooled charging wire harness. The liquid cooling system in the liquid-cooled charging wire harness can quickly take away heat to realize fast charging. The liquid cooling directly conducts heat to the cooling liquid, has high heat dissipation efficiency, significantly reduces the temperature, prolongs the service life of the charging system, and at least solves one of the problems in the background art.

[0006] The present application provides the following technical scheme:

[0007] An isolated high-voltage liquid-cooled charging wire harness comprises a high-voltage connector and a charging seat, and a liquid-cooled wire is arranged between the high-voltage connector and the charging seat.

[0008] The liquid-cooled wire comprises a first liquid-cooled wire and a second liquid-cooled wire.

[0009] The first liquid-cooled conductor and the second liquid-cooled conductor are structurally identical, each comprising an insulating layer, a conductor arranged inside the insulating layer, and a flow guide pipe arranged inside the conductor;

[0010] The first liquid-cooled conductor is internally provided with a first liquid-cooled pipe, and the second liquid-cooled conductor is internally provided with a second liquid-cooled pipe; the first liquid-cooled pipe and the second liquid-cooled pipe are connected at one end of the charging base; the first liquid-cooled pipe is connected at one end close to the high-voltage connector with a first liquid-cooled flow guide pipe; the second liquid-cooled pipe is connected at one end close to the high-voltage connector with a second liquid-cooled flow guide pipe; the first liquid-cooled pipe and the second liquid-cooled pipe are internally provided with liquid-cooled medium;

[0011] The inner walls of the first liquid-cooled pipe and the second liquid-cooled pipe are uniformly arrayed with a plurality of deformation baffles along the length direction; the deformation baffles are annularly distributed in the same radial section.

[0012] The first liquid-cooled pipe and the second liquid-cooled pipe are internally provided with flow-increasing members; the flow-increasing members increase the flow speed of the liquid-cooled medium.

[0013] The flow-increasing members comprise helical blades; the helical blades are connected with a pressing plate; the pressing plate is arranged perpendicularly to the flow direction of the liquid-cooled medium; when the pressing plate is subjected to increased pressure of the liquid-cooled medium, the helical blades rotate to increase the flow speed of the liquid-cooled medium.

[0014] Preferably, the high-voltage connector comprises a shell; the other end of the shell is provided with a waterproof plug and a rear cover; the rear cover is sealingly connected with the shell through the waterproof plug; the shell is internally provided with a first liquid-cooled terminal and a second liquid-cooled terminal; the outer side of the first liquid-cooled terminal is provided with a first upper insulating shell and a first lower insulating shell; the outer side of the second liquid-cooled terminal is provided with a second upper insulating shell and a second lower insulating shell; the first lower insulating shell, the first upper insulating shell, the second lower insulating shell, and the second upper insulating shell are assembled into a closed structure; after assembly, the closed structure is assembled with the first liquid-cooled connector and the second liquid-cooled connector, the waterproof plug, and the rear cover; the rear cover is provided with a through hole for the liquid-cooled conductor to pass through; the first liquid-cooled conductor and the second liquid-cooled conductor are pre-assembled on the rear cover to form an integrated structure with the waterproof plug and the rear cover.

[0015] Preferably, the conductor of the first liquid-cooled conductor is connected with the first liquid-cooled terminal; the conductor of the second liquid-cooled conductor is connected with the second liquid-cooled terminal; the first liquid-cooled pipe is connected with the interface end one of the first liquid-cooled connector; the first liquid-cooled pipe is connected with the interface end two of the first liquid-cooled connector; the second liquid-cooled pipe is connected with the connection end one of the second liquid-cooled connector; and the second liquid-cooled pipe is connected with the connection end two of the second liquid-cooled connector.

[0016] Preferably, the charging base comprises a charging base body, a terminal support provided on one side of the charging base body, a fastener provided on the terminal support, the fastener being a screw, the terminal support being connected to the charging base body by the screw, a third liquid cooling connector provided on the side of the terminal support away from the charging base body, the third liquid cooling connector being of a "U" shape, a first terminal and a second terminal respectively assembled on the two side faces of the terminal support, the first terminal being connected to a conductor of a first liquid cooling wire, the second liquid cooling terminal being connected to a conductor of a second liquid cooling wire, the third liquid cooling connector comprising two connectors, a first connector and a second connector, the first connector being connected to the other end of a first liquid cooling pipe, the second connector being connected to the other end of a second liquid cooling pipe, the charging base further comprising a waterproof cover member, the first liquid cooling wire and the second liquid cooling wire penetrating through the waterproof cover member, a convex groove being provided on the inner circumferential side of the waterproof cover member, a concave groove being provided on the circumferential side of the charging base body, the waterproof cover being assembled by the convex groove and the concave groove.

[0017] Preferably, an insulating connecting body is provided between the first liquid cooling wire and the second liquid cooling wire, the insulating connecting body being of rubber material, a fixing member being provided on the outer side wall of the liquid cooling wire along the length direction, a through hole being provided on the fixing member, the liquid cooling wire being fixed to the vehicle frame by a cable tie penetrating through the through hole of the fixing member, a hard layer being provided on the side of the fixing frame close to the liquid cooling wire, the hard layer being of metal or plastic material.

[0018] Preferably, a pipe wall is provided on the inner side of the first liquid cooling pipe and the second liquid cooling pipe, a plurality of deformation baffles being connected to the pipe wall, the deformation baffles being made of temperature memory alloy, a plurality of deformation baffles being provided on the same radial section of the liquid cooling pipe, the plurality of deformation baffles forming a ring structure, a middle through cavity being provided on the inner side of the plurality of deformation baffles, a side through cavity being provided between two adjacent deformation baffles, when the temperature of the liquid cooling wire increases to the deformation temperature of the deformation baffle, the deformation baffle deforms in the upstream direction of the liquid cooling medium, the acute angle between the deformation baffle and the pipe wall increases, and the diameter of the middle through cavity decreases.

[0019] Preferably, a heat-conducting silica gel layer is provided on the inner side of the pipe wall, a plurality of layers of lamellas are provided on the surface of the heat-conducting silica gel layer, gaps are provided between the lamellas, the lamellas and the heat-conducting silica gel layer are of an integral structure, the lamellas are of silica gel material, a plurality of temperature deformation members are connected to the side of the heat-conducting silica gel layer close to the pipe wall, the temperature deformation members are provided with connecting apexes, the connecting apexes are connected to the heat-conducting silica gel layer, the temperature deformation members lift up the heat-conducting silica gel layer after deformation, a plurality of fixing points are further provided between the heat-conducting silica gel layer and the pipe wall, the fixing points fixedly connect the heat-conducting silica gel layer and the pipe wall by screws, a plurality of fixing points are arranged around each connecting apex, the heat-conducting silica gel layer forms a wavy structure after the plurality of temperature deformation members lift up the heat-conducting silica gel layer after deformation.

[0020] Preferably, the flow-increasing member is arranged at the position of the hard layer of the liquid-cooled wire, and the hard layer is arranged to prevent the liquid-cooled wire from being pressed by bending deformation; the flow-increasing member further comprises a fixed block, the two ends of the fixed block are connected to the inner side of the pipe wall of the liquid-cooled pipe one through the arranged connecting rods, and the fixed block is provided with helical blades.

[0021] Preferably, the inner side of the fixed block is provided with a cylindrical cavity, the inner side wall of the cavity is provided with an annular clamping block, and the clamping block is provided with a plurality of insertion holes on one side; the helical blades are connected to the connecting disc at one end in the cavity in a gap connection mode, the connecting disc is symmetrically connected with two "L"-shaped insertion rods, the insertion rods can be inserted into the insertion holes; the other side of the connecting disc is rotatably connected with a connecting rod, the connecting rod penetrates through the fixed block and is arranged in a gap sliding mode with the fixed block, the other end of the connecting rod is connected with a pressing plate, a deformation spring is arranged on the connecting rod and between the pressing plate and the fixed block; the connecting rod and the helical blades can vertically slide in the fixed block; the pressing plate is arranged close to the middle through cavity formed by the deformation stopper.

[0022] Preferably, the temperature deformation member is arranged in the cavity of the pipe wall, the pipe wall has a hollow structure, and the temperature deformation member comprises a cylinder body, one end of the cylinder body is connected with the pipe wall, a temperature memory spring is arranged in the cylinder body, one end of the temperature memory spring is connected with a heat-conducting rod, the heat-conducting rod is made of metal, the other end of the temperature memory spring is connected with a top rod, the top rod penetrates through the cylinder body, and the top rod is provided with a connecting top point connected with a heat-conducting silica gel layer.

[0023] Preferably, the insulating layer is one or more of silica gel, cross-linked polyolefin, and PVC insulating material, the conductor is copper or aluminum conductive metal, and the liquid-cooled pipe is one or more of polyimide, silica gel, and thermoplastic polyurethane material.

[0024] Preferably, the first liquid-cooled wire and the second liquid-cooled wire are stripped of the insulating layer at both ends of the liquid-cooled wire to expose the conductor and the liquid-cooled pipe, and the conductor is connected to the first liquid-cooled terminal, the second liquid-cooled terminal, the first terminal of the liquid-cooled fast-charging charging seat, and the second terminal of the liquid-cooled fast-charging charging seat of the high-voltage connector, respectively; and the connector is one of ultrasonic welding, plasma welding, friction welding, and pressure welding.

[0025] Preferably, the connection mode of the liquid-cooled pipe one and the liquid-cooled pipe two with the first liquid-cooled connector, the second liquid-cooled connector, and the third liquid-cooled connector is one of interference fit, gluing, and ultrasonic welding; the high-voltage connector first liquid-cooled connector, the high-voltage connector second liquid-cooled connector, and the liquid-cooled fast-charging charging seat third liquid-cooled connector are respectively installed on the first liquid-cooled terminal of the liquid-cooled high-voltage connector, the second liquid-cooled terminal of the high-voltage connector, the first terminal of the liquid-cooled fast-charging charging seat, and the second terminal of the liquid-cooled fast-charging charging seat; and the connection structure is one of interference fit, gluing, and ultrasonic welding.

[0026] The first liquid cooling connector, the second liquid cooling connector and the third liquid cooling connector are preferably hollow structures, and the materials can be copper, aluminum, ceramic materials outside metals with excellent heat conduction performance, glass fiber reinforced plastic, mica sheet, polyimide film and hard anodized aluminum material; ceramic materials, glass fiber reinforced plastic, mica sheet, polyimide film and hard anodized aluminum material can also be used for forming.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] The present application is a high-voltage liquid cooling charging harness, which can quickly take away heat and realize fast charging.

[0029] The cooling is significant, and the service life of the charging system is prolonged. The low-temperature operating environment slows down the aging of the harness, improves the reliability of the harness, reduces the failure rate, and ensures the safety of charging. The liquid cooling system is small in size and light in weight, which reduces the weight of the harness and improves the endurance. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0031] Figure 1 is a schematic diagram of the overall structure of the harness of the present application.

[0032] Figure 2 is a schematic diagram of the structure of the high-voltage connector of the present application.

[0033] Figure 3 is a schematic diagram of the structure of the charging base of the present application.

[0034] Figure 4 is a schematic diagram of the structure of the liquid cooling wire of the present application.

[0035] Figure 5 is a schematic diagram of the circulation flow of the liquid cooling medium of the present application.

[0036] Figure 6 is a schematic diagram of the structure of the third liquid cooling connector of the present application.

[0037] Figure 7 is a schematic diagram of the structure of the first liquid cooling connector and the second liquid cooling connector of the present application.

[0038] Figure 8 is a schematic diagram of the structure of the liquid cooling wire of the present application.

[0039] Figure 9 Figure 1 is a schematic diagram of a partial structure of a liquid cooling wire fixing member according to the present application.

[0040] Figure 10 Figure 2 is a schematic diagram of a position of a flow increasing member according to the present application.

[0041] Figure 11 Figure 3 is a schematic diagram of a cross-sectional structure of a deformation baffle according to the present application.

[0042] Figure 12 Figure 4 is a schematic diagram of a partial enlarged structure of A according to the present application.

[0043] Figure 13 Figure 5 is a schematic diagram of a partial enlarged structure of B according to the present application.

[0044] Figure 14 Figure 6 is a schematic diagram of a partial enlarged structure of C according to the present application.

[0045] Figure 15 Figure 7 is a schematic diagram of a structure of a clamping block according to the present application.

[0046] Figure 16 Figure 8 is a schematic diagram of a partial enlarged structure of D according to the present application.

[0047] Figure 17 Figure 9 is a schematic diagram of a structure of a deformation baffle and a temperature deformation member after deformation according to the present application.

[0048] Figure 18 Figure 10 is a schematic diagram of a layout structure of a connecting vertex and a fixing point according to the present application. DETAILED DESCRIPTION

[0049] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0050] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0051] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and do not mean to particularly indicate the order or sequence, nor to limit the present application, which are merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features among various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0052] Embodiment one:

[0053] Reference Figures 1-7The utility model provides an isolated high pressure liquid cooling charging harness, including high pressure connector 1, charging seat 2, be equipped with liquid cooling wire between high pressure connector 1 and charging seat 2, liquid cooling wire includes first liquid cooling wire 3 and second liquid cooling wire 4, first liquid cooling wire 3 and second liquid cooling wire 4 same structure, all include insulating layer 301, the inside of insulating layer 301 is equipped with conductor 302, the inside of conductor 302 is equipped with flow guide pipe, first liquid cooling pipe one 303 is equipped with in first liquid cooling wire 3, second liquid cooling pipe two 403 is equipped with in second liquid cooling wire 4, and first liquid cooling pipe one 303 is connected with second liquid cooling pipe two 403 at one end of charging seat 2, and first liquid cooling flow guide pipe 5 is connected to the one end of first liquid cooling pipe one 303 close to high pressure connector 1, and second liquid cooling flow guide pipe 6 is connected to the one end of second liquid cooling pipe two 403 close to high pressure connector 1, and there is liquid cooling medium in first liquid cooling pipe one 303 and second liquid cooling pipe two 403, and the inside wall of first liquid cooling pipe one 303 and second liquid cooling pipe two 403 is evenly arranged with multiple deformation baffle 10 along the length direction, and the deformation baffle 10 is annularly distributed in the same radial section, and the inside of first liquid cooling pipe one 303 and second liquid cooling pipe two 403 is equipped with flow increasing piece, and the flow increasing piece promotes the flow speed of liquid cooling medium, high pressure connector 1 includes shell 101, and the other end of shell 101 is equipped with waterproof plug 107 and back cover 106, and back cover 106 is sealedly connected with the shell through waterproof plug 107, and the inside of shell 101 is equipped with first liquid cooling terminal 102 and second liquid cooling terminal 111, and the outside of first liquid cooling terminal 102 is equipped with first insulating shell upper 104 and first insulating shell lower 103, and the outside of second liquid cooling terminal 111 is equipped with second insulating shell upper 109 and second insulating shell lower 110, and first insulating shell lower 103, first insulating shell lower 103, second insulating shell upper 109 and second insulating shell lower 110 are assembled into closed structure, and are assembled after with first liquid cooling connector 105 and second liquid cooling connector 108, waterproof plug 107, back cover 106 are assembled, and back cover 106 is equipped with through -hole, and liquid cooling wire is crossed, and first liquid cooling wire 3 and second liquid cooling wire 4 are preassembled on back cover 106, and are assembled into integral structure with waterproof plug 107, back cover 106.

[0054] The conductor 302 of first liquid cooling wire 3 is connected with first liquid cooling terminal 102, and the conductor 302 of second liquid cooling wire 4 is connected with second liquid cooling terminal 111, and the interface end one 105a of first liquid cooling connector 105 is connected with first liquid cooling pipe one 303, and the interface end two 105b of first liquid cooling connector 105 is connected with first liquid cooling pipe, and the connection end one 108a of second liquid cooling connector 108 is connected with second liquid cooling pipe two 403, and the connection end two 108b of second liquid cooling connector 108 is connected with second liquid cooling pipe.

[0055] The charging base 2 comprises a charging base body 201, a terminal support 204 provided on one side of the charging base body 201, a fastener 203 provided on the terminal support 204, the fastener 203 being in the form of a screw, the terminal support 204 being connected to the charging base body 201 by the screw, a third liquid cooling connector 205 provided on the side of the terminal support 204 away from the charging base body 201, the third liquid cooling connector 205 being in the form of a "U" structure, a first terminal 202 and a second terminal 207 respectively assembled on the two side faces of the terminal support 204, the first terminal 202 being connected to a conductor 302 of the first liquid cooling wire 3, and the second liquid cooling terminal 111 being connected to a conductor 302 of the second liquid cooling wire 4, the third liquid cooling connector 205 comprising two connectors, a first connector 205a and a second connector 205b, the first connector 205a being connected to the other end of the first liquid cooling pipe 303, and the second connector 205b being connected to the other end of the second liquid cooling pipe 403, the charging base 2 further comprising a waterproof cover integrated piece 206, the first liquid cooling wire 3 and the second liquid cooling wire 4 penetrating through the waterproof cover integrated piece 206, a convex groove being provided on the inner circumferential side of the waterproof cover integrated piece 206, and a concave groove being provided on the circumferential side of the charging base body 201, the waterproof cover being assembled by the convex groove and the concave groove of the charging base body 201.

[0056] The insulating layer 301 is one or more of silica gel, cross-linked polyolefin, and PVC insulating material, the conductor 302 is a conductive metal such as copper or aluminum, and the liquid cooling pipe is one or more of polyimide, silica gel, and thermoplastic polyurethane material. The first liquid cooling wire 3 and the second liquid cooling wire 4 are stripped of the insulating layer 301 at the two ends of the liquid cooling wire, so as to expose the conductor 302 and the liquid cooling pipe, the conductor 302 being connected to the first liquid cooling terminal 102, the second liquid cooling terminal 111, the first terminal 202 of the liquid cooling fast charging charging base 2, and the second terminal 207 of the liquid cooling fast charging charging base 2 of the high-voltage connector 1 respectively, the connector being in the form of one of ultrasonic welding, plasma welding, friction welding, and pressure welding. The connection between the first liquid cooling pipe 303 and the second liquid cooling pipe 403 and the first liquid cooling connector, the second liquid cooling connector 108, and the third liquid cooling connector 205 is in the form of one of interference fit, gluing, and ultrasonic welding; the first liquid cooling connector 105 of the high-voltage connector 1, the second liquid cooling connector 108 of the high-voltage connector 1, and the third liquid cooling connector 205 of the liquid cooling fast charging charging base 2 are respectively installed on the first liquid cooling terminal 102 of the liquid cooling high-voltage connector 1, the second liquid cooling terminal 111 of the high-voltage connector 1, the first terminal 202 of the liquid cooling fast charging charging base 2, and the second terminal 207 of the liquid cooling fast charging charging base 2; and the connection structure is in the form of one of interference fit, gluing, and ultrasonic welding.

[0057] The first liquid cooling connector 105, the second liquid cooling connector 108, and the third liquid cooling connector 205 are hollow structures, and the materials can be copper, aluminum, metal with excellent heat conduction performance, ceramic material outside the metal, glass fiber reinforced plastic, mica sheet, polyimide film, and hard anodized aluminum material; ceramic material, glass fiber reinforced plastic, mica sheet, polyimide film, and hard anodized aluminum material can also be used for molding.

[0058] Embodiment two:

[0059] Reference Figures 8-12 On the basis of embodiment one, the first liquid cooling wire 3 and the second liquid cooling wire 4 are provided with an insulating connecting body 7, the insulating connecting body 7 is made of rubber material, the liquid cooling wire is provided with a fixed part 8 at the outer side wall in the length direction, the fixed part 8 is provided with a through hole, and a cable tie is used to pass through the through hole of the fixed part 8 to fix the liquid cooling wire on the frame; the side of the fixed frame close to the liquid cooling wire is provided with a hard layer 9, and the hard layer 9 is made of metal or plastic material. The inner side of the liquid cooling pipe one 303 and the liquid cooling pipe two 403 is provided with a pipe wall 3031, a plurality of deformation baffles 10 are connected to the pipe wall 3031, the deformation baffles 10 are made of temperature memory alloy 30332, the same radial section of the liquid cooling pipe is provided with a plurality of deformation baffles 10, the plurality of deformation baffles 10 form a ring structure, and the inner side of the plurality of deformation baffles 10 is provided with a middle through cavity 11, and the side of two adjacent deformation baffles 10 is provided with a side through cavity 12; when the temperature of the liquid cooling wire rises and reaches the deformation temperature of the deformation baffle 10, the deformation baffle 10 deforms in the upstream direction of the liquid cooling medium, the acute angle between the deformation baffle 10 and the pipe wall 3031 increases, and the diameter of the middle through cavity 11 decreases.

[0060] The inner side of the pipe wall 3031 is provided with a heat-conducting silica gel layer 3032, the surface of the heat-conducting silica gel layer 3032 is provided with multiple layers of lamellas, gaps are arranged between the lamellas, the lamellas and the heat-conducting silica gel layer 3032 are of an integral structure, and the lamellas are made of silica gel; a plurality of temperature deformation pieces 3033 are connected to the side of the heat-conducting silica gel layer 3032 close to the pipe wall 3031, the temperature deformation pieces 3033 are provided with connecting apexes 30335, the connecting apexes 30335 are connected with the heat-conducting silica gel layer, the temperature deformation pieces 3033 are deformed to lift the heat-conducting silica gel layer 3032, and a plurality of fixing points 30336 are further arranged between the heat-conducting silica gel layer 3032 and the pipe wall 3031, the fixing points 30336 are used to fixedly connect the heat-conducting silica gel layer 3032 and the pipe wall 3031 through screws; a plurality of fixing points 30336 are arranged around each connecting apex 30335, and after the plurality of temperature deformation pieces 3033 are deformed to lift the heat-conducting silica gel layer 3032, the fixing points 30336 are used to make the heat-conducting silica gel layer 3032 form a wave-shaped structure. The flow-increasing piece is arranged at a position corresponding to the hard layer 9 of the liquid-cooled wire, and the hard layer 9 is arranged to prevent the liquid-cooled wire from being bent and deformed to press the flow-increasing piece; the flow-increasing piece further comprises a fixed block 3034, the two ends of the fixed block 3034 are connected with the inner side of the pipe wall 3031 of the liquid-cooled pipe 1 through arranged connecting rods, and the fixed block 3034 is provided with helical blades 3036.

[0061] The inner side of the fixed block 3034 is provided with a cylindrical cavity, the inner side wall of the cavity is provided with an annular clamping block 3035, and one side of the clamping block 3035 is provided with a plurality of insertion holes 3042; the helical blades 3036 are connected with the fixed block 3034 in a clearance, one end of the helical blades 3036 located in the cavity is connected with a connecting disc 3037, two “L”-shaped insertion rods 3038 are symmetrically connected to the connecting disc 3037, the insertion rods 3038 can be inserted into the insertion holes 3042; the other side of the connecting disc 3037 is rotatably connected with a connecting rod 3039, the connecting rod 3039 penetrates through the fixed block 3034 and is arranged in a clearance sliding mode with the fixed block 3034, the other end of the connecting rod 3039 is connected with a pressing plate 3040, a deformation spring 3041 is arranged on the connecting rod 3039 and located between the pressing plate 3040 and the fixed block 3034; the connecting rod 3039 and the helical blades 3036 can vertically slide in the fixed block 3034; the pressing plate 3040 is arranged close to the middle through cavity 11 formed by the temperature deformation piece 10.

[0062] The temperature deformation piece 3033 is arranged in the cavity of the pipe wall 3031, the pipe wall 3031 has a hollow structure, the temperature deformation piece 3033 comprises a cylinder body 30331, one end of the cylinder body 30331 is connected with the pipe wall 3031, a temperature memory spring is arranged in the cylinder body 30331, one end of the temperature memory spring is connected with a heat conduction rod 30333, the heat conduction rod 30333 is made of metal, the other end of the temperature memory spring is connected with a top rod 30334, the top rod 30334 penetrates through the cylinder body 30331, and the top rod 30334 is provided with a connecting top point 30335, and the connecting top point 30335 is connected with the heat conduction silica gel layer 3032.

[0063] Embodiment three:

[0064] Reference Figures 13-18 On the basis of embodiment two, when the first liquid cooling wire 3 is used, the free end of the first liquid cooling wire 3 is connected with the input end of the cooling medium, the cooling medium is cooling liquid, enters the liquid cooling pipe one 303 through the first liquid cooling joint 105, flows to the liquid cooling pipe two 403 through the third liquid cooling joint 205, and then flows out through the second liquid cooling joint 108, and circulates to the cooling liquid system of the vehicle body, so that the cooling of the charging circuit of the charging seat 2 to the battery pack is realized; when the ordinary power electric gun is used for charging, because the charging power is low, the heat generated by the charging wire harness is low, at this time, the temperature memory alloy 30332 of the deformation baffle 10 and the temperature memory spring of the temperature deformation piece 3033 do not reach the deformation temperature, and do not deform, the deformation baffle 10 is in the state of adhering to the liquid cooling pipe wall 3031, and the liquid cooling medium in the liquid cooling pipe one 303 and the liquid cooling pipe two 403 is in the condition of normal flow rate, and can meet the heat absorption; and it should be understood that because the diameter of the liquid cooling pipe is large under the condition of normal flow rate of the liquid cooling medium, the pressure plate 3040 in the liquid cooling pipe is subjected to small pressure, the connecting disc 3037 and the plug rod 3038 are subjected to the action of tension force through the elastic force of the deformation spring 3041, the plug rod 3038 is inserted into the plug hole 3042, so that the spiral blade 3036 is limited, and rotation of the spiral blade 3036 is prevented; when the cooling medium passes through the spiral blade 3036, the path of the cooling medium changes from a straight line to a spiral curve structure, the residence time of the cooling medium in the liquid cooling pipe is prolonged, so that the heat generated by the conductor 302 can be completely absorbed, the conductor 302 is in a good temperature working condition, and damage to the battery caused by unstable charging voltage due to high temperature of the wire harness is prevented.

[0065] When charging with a fast-charging gun, the charging power is high, the heat generated by the charging harness is high, and the cooling medium at a normal flow rate is not sufficient to fully remove the heat generated by the conductor 302, the cooling efficiency is reduced, and the charging harness cannot reach the best charging working condition; At this time, because the conductor 302 generates more heat, when the generated heat accumulates and is transmitted to the deformation baffle 10, the deformation baffle 10 reaches the phase change temperature, the deformation baffle 10 deforms, the state of the pipe wall 3031 changes from close to perpendicular to the pipe wall 3031, and after the deformation baffle 10 deforms, the diameter of the middle through cavity 11 becomes smaller, forming a cavity between the two groups of deformation baffles 10 along the length direction of the liquid cooling pipe. When the cooling medium flows into the cavity, because the diameter of the pipe wall 3031 is larger than the diameter of the middle through cavity 11, the liquid cooling medium will flow to the pipe wall 3031 to fill the entire cavity, and when the liquid cooling medium close to the pipe wall 3031 is blocked by the deformation baffle 10, it will flow in the opposite direction, and the cooling medium flowing in the opposite direction collides with the subsequent cooling medium entering the cavity from the upstream,

[0066] The convection effect makes the cooling medium rotate, the flow rate increases during the rotation process, the residence time of the liquid cooling medium in the cavity increases, the contact time between the cooling medium and the pipe wall 3031 is indirectly increased, thereby helping the heat generated by the conductor 302 to be quickly transmitted to the cooling medium, improving the heat transfer efficiency, and achieving the effect of quickly cooling the conductor 302; However, in the above process, the deformation of the deformation baffle 10 blocks the cooling medium in the liquid cooling pipe, slows down the flow rate of the liquid cooling medium, and is not conducive to quickly removing heat by the liquid cooling medium, so the flow increasing member is arranged at the place where the liquid cooling pipe one 303 and the liquid cooling pipe two 403 are located in the hard layer 9, to increase the flow rate of the cooling medium and prevent the flow rate from being too slow to affect the cooling of the conductor 302; When the diameter of the middle through cavity 11 becomes smaller, the diameter of the middle through cavity 11 is smaller than the diameter of the liquid cooling pipe, the pressing plate 3040 is arranged at a position close to the middle through cavity 11 and downstream of the middle through cavity 11, when the diameter of the liquid flow decreases, the pressure of the water flow increases, the pressing plate 3040 is subjected to increased pressure, the pressing plate 3040 drives the connecting rod 3039 and the connecting disc 3037 to move, the plug rod 3038 is separated from the plug hole 3042, and the spiral blade 3036 is rotated under the action of the water flow, thereby increasing the flow of the cooling liquid in the cavity between the two groups of deformation baffles 10 to the downstream, thereby ensuring that the cooling medium fully absorbs heat and ensuring the flow rate of the cooling medium to a certain extent, and better realizing the cooling effect of the conductor 302.

[0067] In order to prevent the deformation baffle 10 from affecting the flow rate of the cooling medium, prevent the diameter of the middle through cavity 11 from being too small, and cause the flow rate in the liquid cooling pipe to decrease, affect the cooling of the conductor 302, the radius of the middle through cavity 11 is d1, the width of the deformation baffle after deformation is d2, and d1 / d2 satisfies the value range of 1.8-3.2; if the radius of the middle through cavity 11 is too large, the flow resistance of the deformation baffle is weakened, which is not conducive to the formation of the vortex flow in the cavity formed between the two groups of deformation baffles, cannot effectively prolong the contact time of the cooling medium and the pipe wall 3031, and cannot achieve good heat dissipation effect; if the width of the deformation baffle after deformation is too wide, the radius of the middle through cavity 11 will be too small, which limits the flow rate of the cooling medium in the liquid cooling pipe and affects the heat exchange efficiency of the liquid cooling medium. The liquid cooling pipe is provided with three deformation baffles 10 in the same radial section, and the three deformation baffles 10 are provided with a side through cavity 12 therebetween, the central angle of the side through cavity 12 is θa, and the range of θa satisfies 10°-15°, and the central angle of a single deformation baffle 10 is θb, and the angle range of θb is 60°-80°; the side through cavity 12 is arranged between the deformation baffles, according to the principle of fluid mechanics momentum conservation, when the cooling medium passes through the side through cavity 12, the cooling medium will be affected by the shape and width of the side through cavity 12, so that the flow direction and speed of the cooling medium change, and this change will form a rotating force in the cavity between the two groups of deformation baffles 10, and form a vortex flow; by limiting the central angle of the small side through cavity 12, the vortex flow is more stable, and the vortex flow is more dense, and by limiting the central angle of the side through cavity 12, the speed and distribution of the vortex flow are limited, which is more conducive to the cooling medium to fully contact with the pipe wall 3031 in the cavity between the two groups of deformation baffles 10, take away the heat generated by the conductor 302, and the small side through cavity 12 can reduce the flow resistance of the liquid cooling medium, if the side through cavity 12 is large, then excessive cooling medium will pass through the side through cavity 12, affect the formation of the vortex flow in the cavity between the two groups of deformation baffles 10, cannot increase the residence time of the liquid cooling medium in the cavity, and cannot fully absorb the heat generated by the conductor 302, thereby affecting the cooling effect.

[0068] When the heat generated by the charging harness is high, the temperature in the liquid cooling pipe rises, and if it reaches the phase transition temperature of the temperature memory spring of the temperature deformation piece 3033, the temperature memory spring is elongated, pushing the top rod 30334 and the connecting top 30335 to lift the heat-conducting silica gel layer 3032. The heat-conducting silica gel layer 3032 has an elastic property, and when it is stretched and lifted, a protrusion is formed on the inner wall of the liquid cooling pipe. Through the reticular structure layout of the connecting top 30335 and the fixed point 30336, the heat-conducting silica gel layer 3032 forms a wave-shaped protrusion on the inside of the pipe wall 3031. The specific surface area of the heat-conducting silica gel layer 3032 increases, and the multiple layers of the layer near the wall-hanging side are unfolded, fully contacting the cooling medium, increasing the contact area of the heat-conducting silica gel layer 3032 with the cooling medium. The conductor 302 transfers heat to the heat-conducting silica gel layer 3032, improving the heat conduction efficiency between the conductor 302, the heat-conducting silica gel layer 3032, and the cooling medium. Combined with the joint action of the deformation baffle 10 and the flow-increasing piece, the heat dissipation efficiency is high, and the cooling is significant.

[0069] Other technical solutions not described in detail in the present application are existing technologies in the art, and will not be described here.

[0070] The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. An isolated high-voltage liquid-cooled charging harness, characterized in that, It includes a high-voltage connector (1) and a charging base (2), with a liquid-cooled wire between the high-voltage connector (1) and the charging base (2); The liquid-cooled wire includes a first liquid-cooled wire (3) and a second liquid-cooled wire (4); The first liquid-cooled wire (3) and the second liquid-cooled wire (4) have the same structure, both including an insulation layer (301), a conductor (302) is provided inside the insulation layer (301), and a flow guide tube is provided inside the conductor (302); The first liquid-cooled wire (3) is provided with a liquid-cooled tube 1 (303) inside, and the second liquid-cooled wire (4) is provided with a liquid-cooled tube 2 (403) inside. The liquid-cooled tube 1 (303) and the liquid-cooled tube 2 (403) are connected at one end of the charging base (2). The end of the liquid-cooled tube 1 (303) near the high-voltage connector (1) is connected to the first liquid-cooled guide tube (5), and the end of the liquid-cooled tube 2 (403) near the high-voltage connector (1) is connected to the second liquid-cooled guide tube (6). The liquid-cooled tube 1 (303) and the liquid-cooled tube 2 (403) contain liquid-cooling medium inside. Multiple deformation baffles (10) are uniformly arrayed along the length direction on the inner sidewalls of liquid cooling pipe one (303) and liquid cooling pipe two (403), and the deformation baffles (10) are distributed in a ring in the same radial section; Liquid cooling pipe 1 (303) and liquid cooling pipe 2 (403) are equipped with flow boosters, which increase the flow rate of the liquid cooling medium. The flow booster includes a spiral blade (3036), which is connected to a pressure plate (3040). The pressure plate (3040) is arranged perpendicular to the flow direction of the liquid cooling medium. When the pressure of the liquid cooling medium on the pressure plate (3040) increases, the spiral blade (3036) rotates to increase the flow velocity of the liquid cooling medium. Liquid cooling pipe 1 (303) and liquid cooling pipe 2 (403) are provided with pipe wall (3031) on the inner side. Multiple deformation baffles (10) are connected on the pipe wall (3031). The deformation baffles (10) are made of temperature memory alloy (30332). Multiple deformation baffles (10) are provided on the same radial section of the liquid cooling conduit. Multiple deformation baffles (10) form a ring structure. A middle conduction cavity (11) is provided on the inner side of multiple deformation baffles (10). A side conduction cavity (12) is provided between two adjacent deformation baffles (10). When the temperature of the liquid cooling wire rises and reaches the deformation temperature of the deformation baffle (10), the deformation baffle (10) deforms in the upstream direction of the liquid cooling medium. The acute angle between the deformation baffle (10) and the pipe wall (3031) increases, and the diameter of the middle conduction cavity (11) decreases. The inner side of the tube wall (3031) is provided with a thermally conductive silicone layer (3032), and the surface of the thermally conductive silicone layer (3032) is provided with multiple layers of sheets with gaps between them. The sheets and the thermally conductive silicone layer (3032) are an integral structure, and the sheets are made of silicone. Multiple temperature deformation elements (3033) are connected to the side of the thermally conductive silicone layer (3032) near the pipe wall (3031). Each temperature deformation element (3033) has a connecting vertex (30335), which is connected to the thermally conductive silicone layer (3032). After the temperature deformation element (3033) deforms, it lifts up the thermally conductive silicone layer (3032). Multiple [other components] are also provided between the thermally conductive silicone layer (3032) and the pipe wall (3031). Fixing point (30336) is used to fix the thermally conductive silicone layer (3032) to the pipe wall (3031) by screws; multiple fixing points (30336) are arranged around each connection vertex (30335); after multiple temperature deformation elements (3033) deform and lift the thermally conductive silicone layer (3032), the thermally conductive silicone layer (3032) forms a wave-shaped structure through the fixed points (30336); The flow booster is positioned on the hard layer (9) of the liquid cooling wire. The hard layer (9) is provided to prevent the liquid cooling wire from bending and deforming, which could cause pressure on the flow booster. The flow booster also includes a fixing block (3034). The two ends of the fixing block (3034) are connected to the inner side of the pipe wall (3031) of the liquid cooling pipe (303) through connecting rods. The fixing block (3034) is provided with spiral blades (3036).

2. The isolated high-voltage liquid-cooled charging harness according to claim 1, characterized in that, The high-voltage connector (1) includes a housing (101), and a waterproof plug (107) and a rear cover (106) are provided at the other end of the housing (101). The rear cover (106) is sealed to the housing through the waterproof plug (107). The housing (101) is provided with a first liquid-cooled terminal (102) and a second liquid-cooled terminal (111) inside. The first liquid-cooled terminal (102) is provided with a first insulating housing upper (104) and a first insulating housing lower (103) on the outside. The second liquid-cooled terminal (111) is provided with a second insulating housing upper (109) and a second insulating housing lower (113) on the outside. 0); The first insulating shell lower (103), the first insulating shell lower (103), the second insulating shell upper (109) and the second insulating shell lower (110) are assembled into a closed structure. After assembly, they are assembled with the first liquid cooling connector (105) and the second liquid cooling connector (108), the waterproof plug (107) and the back cover (106). The back cover (106) is provided with a through hole for the liquid cooling wire to pass through. The first liquid cooling wire (3) and the second liquid cooling wire (4) are pre-installed on the back cover (106) and assembled with the waterproof plug (107) and the back cover (106) into an integrated structure.

3. The isolated high-voltage liquid-cooled charging harness according to claim 2, characterized in that, The conductor (302) of the first liquid cooling wire (3) is connected to the first liquid cooling terminal (102), and the conductor (302) of the second liquid cooling wire (4) is connected to the second liquid cooling terminal (111); the first liquid cooling pipe (303) is connected to the first interface end (105a) of the first liquid cooling connector (105), the first liquid cooling guide pipe (5) is connected to the second interface end (105b) of the first liquid cooling connector (105), the second liquid cooling pipe (403) is connected to the first connection end (108a) of the second liquid cooling connector (108), and the second liquid cooling guide pipe (6) is connected to the second connection end (108b) of the second liquid cooling connector (108).

4. The isolated high-voltage liquid-cooled charging harness according to claim 1, characterized in that, The charging base (2) includes a charging base body (201). A terminal bracket (204) is provided on one side of the charging base body (201). A fastener (203) is provided on the terminal bracket (204). The fastener (203) is a screw, which connects the terminal bracket (204) to the charging base body (201). A third liquid cooling connector (205) is provided on the side of the terminal bracket (204) away from the charging base body (201). The third liquid cooling connector (205) has a "U" shaped structure. A first terminal (202) and a second terminal (207) are respectively mounted on both sides of the terminal bracket (204). The first terminal (202) is connected to the conductor (302) of the first liquid cooling wire (3). The second terminal (207) is connected to the conductor (302) of the first liquid cooling wire (3). The conductor (302) is connected to the second liquid cooling wire (4); the third liquid cooling connector (205) includes two connectors, connector one (205a) and connector two (205b), connector one (205a) is connected to the other end of liquid cooling pipe one (303), and connector two (205b) is connected to the other end of liquid cooling pipe two (403); the charging base (2) also includes a waterproof cover integrated piece (206), the waterproof cover integrated piece (206) is through the first liquid cooling wire (3) and the second liquid cooling wire (4), the inner circumferential side of the waterproof cover integrated piece (206) is provided with a protrusion, the circumferential side of the charging base body (201) is provided with a groove, and the waterproof cover integrated piece (206) is assembled with the groove of the charging base body (201) through the provided protrusion.

5. The isolated high-voltage liquid-cooled charging harness according to claim 1, characterized in that, An insulating connector (7) is provided between the first liquid-cooled wire (3) and the second liquid-cooled wire (4). The insulating connector (7) is made of rubber. Fixing members (8) are provided at intervals along the outer side wall of the liquid-cooled wire in the length direction. The fixing members (8) are provided with through holes. The liquid-cooled wire is fixed to the frame by passing a cable tie through the through hole of the fixing member (8). A hard layer (9) is provided on the side of the fixing bracket near the liquid-cooled wire. The hard layer (9) is made of metal or plastic.

6. The isolated high-voltage liquid-cooled charging harness according to claim 1, characterized in that, The inner side of the fixing block (3034) is provided with a cylindrical cavity, and the inner wall of the cavity is provided with an annular locking block (3035). One side of the locking block (3035) is provided with multiple insertion holes (3042). The spiral blade (3036) is rotatably connected to the fixing block (3034) with a gap. One end of the spiral blade (3036) located in the cavity is connected to a connecting plate (3037). Two "L"-shaped insertion rods (3038) are symmetrically connected on the connecting plate (3037). The insertion rods (3038) can be inserted into the insertion holes (3042). The other side of the connecting plate (3037) is rotatably connected to a connecting rod (3039). A connecting rod (3039) is installed through the fixed block (3034) and is slidably installed with a gap between it and the fixed block (3034). The other end of the connecting rod (3039) is connected to a pressure plate (3040). A deformation spring (3041) is installed on the connecting rod (3039) and is located between the pressure plate (3040) and the fixed block (3034). The connecting rod (3039) and the spiral blade (3036) can slide vertically within the fixed block (3034). The pressure plate (3040) is located near the central guide cavity (11) formed by the deformation baffle (10).

7. The isolated high-voltage liquid-cooled charging harness according to claim 1, characterized in that, A temperature deformation element (3033) is installed inside the cavity of the pipe wall (3031). The pipe wall (3031) has a hollow structure. The temperature deformation element (3033) includes a cylindrical body (30331). One end of the cylindrical body (30331) is connected to the pipe wall (3031). A temperature memory spring is provided inside the cylindrical body (30331). One end of the temperature memory spring is connected to a heat-conducting rod (30333). The heat-conducting rod (30333) is made of metal. The other end of the temperature memory spring is connected to a top rod (30334). The top rod (30334) penetrates the cylindrical body (30331). The top rod (30334) is provided with a connecting vertex (30335). The connecting vertex (30335) is connected to the thermally conductive silicone layer (3032).

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