High-voltage wiring harness for new energy automobile

Abstract

A high-voltage wiring harness for a new energy automobile, comprising multiple cable units, a binding member, and a cooling assembly. The directions of the multiple cable units are consistent, and the multiple cable units are disposed at the periphery of the cooling assembly, the cable units being in contact with the cooling assembly such that heat conduction occurs therebetween. The binding member is fixed at the peripheries of the multiple cable units, and the binding member is used for fixing the positions of the cable units and the position of the cooling assembly. The cooling assembly comprises a cooling pipe and a coolant, an accommodating cavity for accommodating the coolant being provided in the cooling pipe, the cooling pipe being in contact with the cable units such that heat conduction occurs therebetween, and end portions of the cooling pipe extending towards two sides of the binding member. The cooling assembly is disposed in a middle area of the high-voltage wiring harness, and the cooling assembly is used for absorbing heat generated by a cable binding area, so that the heat of the local area of the high-voltage wiring harness is reduced, cable performance is improved, and operational risk of the high-voltage wiring harness is reduced.

Description

A high-voltage wire harness for use in a new energy vehicle TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a high-voltage wire harness for use in a new energy vehicle. BACKGROUND

[0002] In a new energy vehicle (electric vehicle, hybrid vehicle), a high-voltage cable is needed to connect a battery to an electrical device (such as an inverter, electric motor, etc.).

[0003] Compared with a traditional fuel vehicle, the cable for use in a new energy vehicle needs to withstand a larger voltage and current, so that the cable for use in a new energy vehicle is quite different from the cable for use in a traditional fuel vehicle. In the prior art, the cable for use in a new energy vehicle usually needs to support at least a voltage of 600V to meet the high-voltage requirement of components such as a battery and an electrical device inside a new energy vehicle.

[0004] Since the high-voltage cable needs to bear a high voltage and transmit a high current, the high-voltage cable generates a large amount of heat. In particular, when a plurality of high-voltage cables are bundled into a high-voltage wire harness and high-voltage electrical energy is transmitted by using the high-voltage wire harness; the high-voltage cables at the bundling points of the high-voltage wire harness are more closely attached, so that the high-voltage cables gather more heat at the bundling point area. When the high-voltage cables gather a large amount of heat, the performance of the high-voltage cables is affected, and the safety of the high-voltage cables is reduced.

[0005] SUMMARY

[0006] In order to improve the heat dissipation performance of the high-voltage wire harness and improve the safety of the high-voltage wire harness, the present application provides a high-voltage wire harness for use in a new energy vehicle.

[0007] The present application provides a high-voltage wire harness for use in a new energy vehicle, which adopts the following technical solution:

[0008] The high-voltage wire harness for use in a new energy vehicle comprises a plurality of cable units, a bundling member and a cooling assembly; the plurality of cable units have a consistent direction, and each of the cable units is arranged at the outer periphery of the cooling assembly, and the cable unit and the cooling assembly are in thermal conduction contact; the bundling member is fixed to the outer periphery of the plurality of cable units, and the bundling member is used to fix the positions of the cable units and the cooling assembly; the cooling assembly comprises a cooling pipe and a cooling liquid, the cooling pipe has a containing cavity for containing the cooling liquid inside, the cooling pipe and the cable unit are in thermal conduction contact, and the end portion of the cooling pipe extends to both sides of the bundling member.

[0009] By adopting the technical scheme, the cooling assembly is arranged in the middle of the cable unit, the cooling pipe can separate the cable unit, thereby reducing the heat accumulation in the middle of the cable unit. Meanwhile, the cooling liquid in the cooling pipe can absorb the heat of the cable binding area. That is, by arranging the cooling assembly in the middle area of the high-voltage wire harness, the cooling assembly can absorb the heat generated by the cable binding area, thereby reducing the heat of the local area of the high-voltage wire harness, improving the performance of the cable, and reducing the operation risk of the high-voltage wire harness.

[0010] Optionally, the cooling assembly further comprises a limiting piece and a mass block; the mass block is arranged in the cooling pipe, and the mass block is used for pushing the cooling liquid to flow; the mass block has a gap for the cooling liquid to flow on the inner wall of the cooling pipe; the limiting piece is arranged on both sides of the mass block, and the limiting piece is arranged on the movement path of the mass block; the limiting piece is fixedly connected with the inner wall of the cooling pipe, and the limiting piece is used for abutting against the mass block and blocking the movement of the mass block.

[0011] By adopting the technical scheme, the mass block has large inertia, so that when the new energy vehicle accelerates or decelerates, the mass block slides in the cooling pipe; the mass block has a pushing effect on the cooling liquid in the cooling pipe, thereby promoting the flow of the cooling liquid in the cooling pipe, and facilitating the heat dissipation of the binding point of the high-voltage wire harness, improving the transmission performance of the cable and the safety of the high-voltage wire harness.

[0012] Optionally, the cooling assembly further comprises an elastic piece, and the elastic piece is arranged on both sides of the mass block; one end of the elastic piece is fixedly connected with the mass block, and the other end of the elastic piece is fixedly connected with the limiting piece.

[0013] By adopting the technical scheme, when the new energy vehicle suddenly accelerates or decelerates, the mass block compresses and stretches the elastic piece; then, the elastic piece pulls the mass block to move back and forth in a straight line, thereby further promoting the flow of the cooling liquid in the cooling pipe and improving the heat absorption and dissipation effect of the cooling assembly on the cable binding area.

[0014] Optionally, the cooling assembly further comprises a partition plate, the partition plate is arranged in the cooling pipe, and the partition plate is fixedly connected with the inner wall of the cooling pipe; the partition plate divides the inner cavity of the cooling pipe into a first cooling channel and a second cooling channel in communication, and the cooling liquid flows along the first cooling channel and the second cooling channel; the limiting piece and the mass block are arranged in the first cooling channel.

[0015] By adopting the technical scheme, the partition plate divides the cavity of the cooling pipe into the annularly communicated first cooling channel and the second cooling channel, thereby facilitating the flow of the cooling liquid in the cooling pipe when the mass block reciprocates in the cooling pipe.

[0016] Optionally, the limiting member is a limiting ring, and a plurality of avoiding notches are arranged at intervals in the limiting ring; the avoiding notches are used for allowing the cooling liquid to flow through.

[0017] By adopting the technical scheme, the avoiding notches are arranged on the limiting member to allow the cooling liquid to pass through, thereby reducing the adsorption of the mass block to the limiting ring, and facilitating the reciprocation of the mass block in the cooling pipe.

[0018] Optionally, a plurality of turbulence members are arranged at intervals on the inner circumferential wall of the cooling pipe along the flow direction of the cooling liquid, and the turbulence members are fixedly connected to the inner circumferential wall of the cooling pipe; the turbulence member comprises two oppositely arranged turbulence strips, the two turbulence strips are arranged along the flow direction of the cooling liquid, and a gap for allowing the cooling liquid to pass through is arranged between the two turbulence strips; the distance between the two turbulence strips increases.

[0019] By adopting the technical scheme, when the cooling liquid flows through the gap between the two turbulence strips, the cooling liquid close to the turbulence strips is accelerated, so that the cooling liquid generates turbulent flow on the surface of the cooling pipe; so that the cooling liquid generates vortex effect, so that the cooling liquid of different heights can flow up and down, improving the heat absorption effect of the cooling liquid on the high-voltage wire harness; at the same time, the adhesion effect of the cooling liquid to the inner circumferential wall of the cooling pipe is improved, and the heat absorption effect of the cooling liquid on the binding area of the high-voltage wire harness is further improved.

[0020] Optionally, the turbulence member comprises a first turbulence member and a second turbulence member, and the first turbulence member and the second turbulence member are arranged at intervals; the first turbulence member comprises two oppositely arranged first turbulence strips, the second turbulence member comprises two oppositely arranged second turbulence strips, and the distance between the two first turbulence strips increases in a direction opposite to the distance between the two second turbulence strips.

[0021] By adopting the technical scheme, when the mass block reciprocates in the cooling pipe, the cooling liquid flows in the forward direction or the reverse direction in the cooling pipe. And by arranging the first turbulence member and the second turbulence member at intervals, the acceleration and turbulence effect of the turbulence member on the cooling liquid are improved.

[0022] Optionally, the cooling assembly further comprises a plurality of heat dissipation fins, and the plurality of heat dissipation fins are fixedly arranged at intervals on the outer circumferences of the two sides of the cooling pipe.

[0023] By adopting the above technical scheme, the heat dissipation fins have a large surface area with the external air, and heat in the cooling pipe and the cooling liquid can be discharged in time from the heat dissipation fins, so as to further improve the heat absorption and dissipation effect of the cooling assembly on the cable binding area.

[0024] Optionally, the cooling pipe comprises a first pipe section, a second pipe section and a transition pipe section in communication, the second pipe section and the transition pipe section are both provided with two, the two second pipe sections are arranged on both sides of the first pipe, the transition pipe section is fixedly arranged between the first pipe and the second pipe section, the cross-sectional area of the first pipe is larger than that of the second pipe section, and the cross-sectional area of the transition pipe section increases along the direction from the second pipe section to the first pipe; the first pipe is arranged in abutment with the cable unit, and a plurality of heat dissipation fins are arranged on the outer periphery of the second pipe section in a spaced manner, the distance from the outer periphery of the heat dissipation fin to the central axis of the cooling pipe is smaller than the distance from the outer periphery of the first pipe to the central axis of the cooling pipe.

[0025] By adopting the above technical scheme, a heat dissipation gap is formed between the heat dissipation fins and the cable unit, so as to reduce the influence of the cooling assembly on the cable unit outside the high-voltage wire harness binding point.

[0026] Optionally, the cooling assembly further comprises a heat-conducting adhesive tape, one side of the heat-conducting adhesive tape is bonded to the outer peripheral wall of the cooling pipe, the other side of the heat-conducting adhesive tape is arranged in abutment with the cable unit, and the heat-conducting adhesive tape is provided with a receiving groove for receiving the cable unit.

[0027] By adopting the above technical scheme, the heat-conducting adhesive tape has high heat conduction and good insulation, can form effective thermal connection between different material surfaces, and improves the heat dissipation effect. The heat-conducting adhesive tape can be tightly and firmly attached to the outer periphery of the cooling pipe and the outer periphery of the cable unit, so as to quickly conduct heat from the cable unit to the cooling pipe.

[0028] The heat-conducting adhesive tape is composed of an acrylic polymer filled with heat-conducting ceramic powder and an organic silicone adhesive.

[0029] The present application has at least one of the following beneficial technical effects:

[0030] 1. By arranging the cooling assembly in the middle region of the high-voltage wire harness, the cooling assembly can absorb heat generated in the cable binding area, so as to reduce the heat in the local region of the high-voltage wire harness, improve the performance of the cable, and reduce the operation risk of the high-voltage wire harness;

[0031] 2. By setting the mass block in the cooling pipe, when the new energy vehicle accelerates or decelerates, the mass block will slide in the cooling pipe; thus the mass block has a pushing effect on the cooling liquid in the cooling pipe, thereby promoting the flow of the cooling liquid in the cooling pipe, which is beneficial to the heat dissipation of the high-voltage wire harness binding point, and improves the transmission performance of the cable and the safety of the high-voltage wire harness;

[0032] 3. When the new energy vehicle suddenly accelerates or decelerates, the mass block moves to one side, the mass block will compress the elastic member on the side, and stretch the elastic member on the other side; when the new energy vehicle runs smoothly, the elastic members on both sides of the mass block will pull the mass block to do reciprocating linear motion, thereby further promoting the flow of the cooling liquid in the cooling pipe, improving the heat absorption and dissipation effect of the cooling assembly on the cable binding area. BRIEF DESCRIPTION OF DRAWINGS

[0033] Fig. 1 is an axonometric view embodying the high-voltage wire harness structure in the present embodiment.

[0034] Fig. 2 is a cross-sectional view embodying the cable unit structure in the present embodiment.

[0035] Fig. 3 is a schematic view embodying the high-voltage wire harness structure in the present embodiment.

[0036] Fig. 4 is a schematic view embodying the high-voltage wire harness structure in the present embodiment.

[0037] BRIEF DESCRIPTION OF DRAWINGS: 1, cable unit; 11, copper conductor layer; 12, cross-linked polyethylene insulation layer; 13, metal mesh shielding layer; 14, polyvinyl chloride inner protective layer; 15, steel wire armor layer; 16, polyvinyl chloride outer protective layer; 2, binding member; 3, cooling assembly; 31, cooling pipe; 311, containing cavity; 3111, first cooling channel; 3112, second cooling channel; 312, first pipe segment; 313, second pipe segment; 314, transition pipe segment; 32, heat dissipation fin; 33, partition plate; 34, limiting member; 341, avoiding notch; 35, mass block; 351, groove; 36, elastic member; 37, first turbulence member; 371, first turbulence bar; 38, second turbulence member; 381, second turbulence bar; 4, heat-conducting adhesive tape; 41, containing groove. DETAILED DESCRIPTION

[0038] The present application will be further described in detail below in conjunction with Figs. 1-4.

[0039] The present embodiment discloses a high-voltage wire harness for use in a new energy vehicle. The high-voltage wire harness is used to connect a battery and an electrical appliance (such as an inverter, an electric motor, etc.).

[0040] Referring to FIG. 1, the high-voltage wire harness for use in a new energy vehicle includes a plurality of cable units 1 and a binding member 2. The binding member 2 is provided along the length direction of the cable unit 1. This embodiment only shows one binding member 2, and the cable unit 1 is provided with four cable units; while in other embodiments, the cable unit 1 can be provided with three, five, six, etc.

[0041] Referring to FIG. 2, the cable unit 1 adopts a high-voltage cable to transmit high-voltage electric energy. This embodiment discloses a cable unit 1, while in other embodiments, the cable unit 1 can also adopt other types of high-voltage and high-temperature resistant cables. Referring to FIG. 2, the cable unit 1 includes, from inside to outside, a copper conductor layer 11, a cross-linked polyethylene insulation layer 12, a metal mesh shielding layer 13, a polyvinyl chloride inner protective layer 14, a steel wire armor layer 15, and a polyvinyl chloride outer protective layer 16. Thus, the cable unit 1 has the performance of transmitting high-voltage current, and has good insulation and anti-electromagnetic interference performance. The copper conductor layer 11 is used to transmit current, and the heat generated by the copper conductor layer 11 transmitting current will be dissipated through the outer surface of the cable unit 1.

[0042] Due to the need for internal power transmission of a new energy vehicle, a plurality of cable units 1 are needed to be used for transmission between a battery and an electric appliance (such as an inverter, a motor, etc.). Therefore, the binding member 2 is often needed to bind a plurality of cable units 1 into a high-voltage wire harness, so as to facilitate the routing of the high-voltage cable in the new energy vehicle. The binding member 2 can adopt a velvet adhesive tape, a plastic cable tie, etc.; this embodiment does not limit the specific material of the binding member 2; in this embodiment, the binding member 2 adopts a plastic cable tie.

[0043] However, the cable unit 1 at the binding point of the high-voltage wire harness is more closely attached, so that the cable unit 1 gathers more heat in the cover area. When the cable gathers more heat, the performance of the cable will be affected, and the safety of the cable unit 1 is reduced.

[0044] Therefore, based on the above technical problem, the present application improves the existing high-voltage wire harness for use in a new energy vehicle, so as to reduce the temperature of the high-voltage cable in the binding point area of the high-voltage wire harness.

[0045] Referring to FIG. 1, the high-voltage wire harness for use in a new energy vehicle further includes a cooling assembly 3 and a heat-conducting adhesive tape 4.

[0046] The plurality of cable units 1 are consistent in direction, and each cable unit 1 is arranged at the outer periphery of the cooling assembly 3, and the cable unit 1 and the cooling assembly 3 are in thermal conduction contact. The binding member 2 is fixed to the outer periphery of the plurality of cable units 1, and the binding member 2 is used to fix the position of the cable unit 1 and the cooling assembly 3. The cooling assembly 3 is provided with a plurality of cooling assemblies 3, and the cooling assemblies 3 are arranged at intervals along the length of the cable unit 1, and the number of the cooling assemblies 3 corresponds to the number of the binding members 2; in this embodiment, only one cooling assembly 3 is shown.

[0047] Referring to Fig. 1, one side of the heat-conducting adhesive tape 4 is adhered to the outer circumferential wall of the cooling pipe 31, and the other side of the heat-conducting adhesive tape 4 is in abutment with the cable unit 1. When the binding member 2 fixes the position of the cable unit 1, the binding member 2 clamps the cable unit 1, so that the cable unit 1 presses the heat-conducting adhesive tape 4, and the heat-conducting adhesive tape 4 is extruded to form a containing groove 41 containing the cable unit 1.

[0048] The heat-conducting adhesive tape 4 is composed of an acrylic polymer filled with heat-conducting ceramic powder and compounded with a silicone adhesive. The heat-conducting adhesive tape 4 has high heat conduction and good insulation, and can form an effective thermal connection between different material surfaces to improve the heat dissipation effect. The heat-conducting adhesive tape 4 can be tightly and firmly attached to the outer circumferences of the cooling pipe 31 and the cable unit 1, and quickly conduct heat from the cable unit 1 to the cooling assembly 3.

[0049] Referring to Figs. 1 and 3, the cooling assembly 3 includes the cooling pipe 31, cooling liquid, heat dissipation fins 32, a partition plate 33, a limiting member 34, a mass block 35, and an elastic member 36.

[0050] Referring to Figs. 1 and 3, the cooling pipe 31 is internally provided with a containing cavity 311 containing cooling liquid, and the cooling pipe 31 is in thermal conduction contact with the cable unit 1. The cooling pipe 31 includes a first pipe section 312, a second pipe section 313, and a transition pipe section 314 connected in series. The second pipe section 313 and the transition pipe section 314 are each provided with two, the two second pipe sections 313 are arranged on both sides of the first pipe, and the transition pipe section 314 is fixedly arranged between the first pipe and the second pipe section 313. The cross-sectional area of the first pipe is larger than that of the second pipe section 313, and the cross-sectional area of the transition pipe section 314 increases in the direction from the second pipe section 313 to the first pipe.

[0051] Referring to Fig. 1, in this embodiment, the heat-conducting adhesive tape 4 is adhered to the outer circumference of the first pipe, and the binding member 2 is arranged opposite to the heat-conducting adhesive tape 4. The cooling pipe 31 can separate several cable units 1, thereby reducing the heat accumulation in the middle part of the cable unit 1. At the same time, the cooling liquid in the cooling pipe 31 absorbs the heat generated in the cable binding area, thereby reducing the heat in the local area of the high-voltage wire harness, improving the performance of the cable, and reducing the operation risk of the high-voltage wire harness

[0052] Referring to FIG. 1, the heat dissipation fins 32 are provided in a plurality of numbers, the plurality of heat dissipation fins 32 are fixed at intervals on the outer periphery of the second pipe section 313, and the distance from the outer periphery of the heat dissipation fin 32 to the central axis of the cooling pipe 31 is smaller than the distance from the outer periphery of the first pipe to the central axis of the cooling pipe 31. The two second pipe sections 313 are arranged on both sides of the high-voltage wire harness binding point, so that the second pipe section 313 can discharge the heat of the high-voltage wire harness binding point. The heat dissipation fin 32 has a large surface area with the outside air, and the heat in the cooling pipe 31 and the cooling liquid can be discharged in time from the heat dissipation fin 32; and there is a heat dissipation gap between the heat dissipation fin 32 and the cable unit 1, thereby reducing the influence of the cooling assembly 3 on the cable unit 1 outside the high-voltage wire harness binding point.

[0053] When the new energy vehicle accelerates or decelerates, the voltage and current of the cable in the high-voltage wire harness will suddenly increase, thereby causing the cable to generate more heat, and further causing the binding area of the cable to accumulate more heat. After the cooling liquid located below the cable binding point absorbs heat, the cooling liquid in this area will be heated, thereby affecting the heat absorption effect of the cooling liquid on the cable. Therefore, the high-voltage wire harness is further improved in this embodiment.

[0054] Referring to FIGS. 3 and 4, the partition plate 33 is arranged in the cooling pipe 31, and the partition plate 33 is fixedly connected with the inner peripheral wall of the cooling pipe 31. The partition plate 33 divides the containing cavity 311 of the cooling pipe 31 into the first cooling channel 3111 and the second cooling channel 3112 in communication, so that the cooling liquid can flow along the first cooling channel 3111 and the second cooling channel 3112.

[0055] Referring to FIGS. 3 and 4, the limiting member 34 and the mass block 35 are arranged in the first cooling channel 3111. The mass block 35 is used to push the cooling liquid to flow, and the mass block 35 has a gap with the inner side wall of the cooling pipe 31 for the transmission of the cooling liquid. The limiting member 34 is provided in two numbers, and the two limiting members 34 are arranged on both sides of the mass block 35. The limiting member 34 is arranged on the movement path of the mass block 35, and the limiting member 34 is fixedly connected with the inner side wall of the cooling pipe 31. The limiting member 34 is used to abut against the mass block 35, and the limiting member 34 is used to block the movement of the mass block 35. In this embodiment, the limiting member 34 is a limiting ring, and the limiting member 34 is provided with a plurality of avoiding notches 341 at intervals. The avoiding notches 341 are used for the flow of the cooling liquid. In this embodiment, the mass block 35 is a metal ball, and the surface of the mass block 35 is provided with a plurality of grooves 351 of different sizes. Thus, when the mass block 35 moves, the extrusion effect of the mass block 35 on the cooling liquid can be improved.

[0056] Referring to FIGS. 3 and 4, in the present embodiment, two elastic members 36 are provided, and the two elastic members 36 are arranged on both sides of the mass 35. One end of the elastic member 36 is fixedly connected with the mass 35, and the other end of the elastic member 36 is fixedly connected with the limiting member 34. In the present embodiment, the elastic member 36 is a spring; and in other embodiments, the elastic member 36 can also be an elastic band.

[0057] The implementation principle of the high-voltage wire harness for a new energy vehicle according to an embodiment of the present application is as follows:

[0058] Referring to FIGS. 1 to 4, when the new energy vehicle accelerates or decelerates, the current transmitted by the high-voltage cable will suddenly increase, and the heat generated by the high-voltage cable will also suddenly increase. Since the mass 35 has a large inertia, the mass 35 will slide in the cooling pipe 31; thus, the mass 35 has a pushing effect on the cooling liquid in the cooling pipe 31, thereby promoting the flow of the cooling liquid in the cooling pipe 31. The cooling liquid at a higher temperature in the middle region of the cooling pipe 31 flows to the end of the cooling pipe 31, and the original cooling liquid at a low temperature at the end of the cooling pipe 31 is supplemented to the middle region of the cooling pipe 31.

[0059] That is, the cooling liquid at a low temperature flows to the region below the cable binding point, thereby using the cooling liquid at a low temperature to absorb the heat accumulated in the region of the cable binding point, reducing the heat accumulation in the region of the cable binding point of the high-voltage wire harness, and being beneficial to the heat dissipation of the cable binding point of the high-voltage wire harness, thereby improving the transmission performance of the cable and the safety of the high-voltage wire harness.

[0060] Meanwhile, when the mass 35 moves to one side, the mass 35 compresses the elastic member 36 on the side, and stretches the elastic member 36 on the other side; and when the new energy vehicle runs stably, the elastic members 36 on both sides of the mass 35 pull the mass 35 to do reciprocating linear motion, thereby further promoting the flow of the cooling liquid in the cooling pipe 31, and improving the heat absorption and dissipation effect of the cooling assembly 3 on the cable binding region.

[0061] Referring to FIGS. 3 and 4, in addition, a plurality of turbulence members are arranged at intervals on the inner circumferential wall of the cooling pipe 31 along the flow direction of the cooling liquid, and the turbulence members are fixedly connected with the inner circumferential wall of the cooling pipe 31; the turbulence members include two oppositely arranged turbulence strips, the turbulence strips are arranged along the flow direction of the cooling liquid, and a gap for the cooling liquid to pass through is arranged between the two turbulence strips; the distance between the two turbulence strips increases. In the present embodiment, the turbulence strips are integrally formed with the cooling pipe 31.

[0062] Referring to FIG. 3 and FIG. 4, in the embodiment, the spoiler includes a first spoiler 37 and a second spoiler 38, the first spoiler 37 is spaced apart from the second spoiler 38; the first spoiler 37 includes two first spoiler strips 371 arranged oppositely, the second spoiler 38 includes two second spoiler strips 381 arranged oppositely, the increasing direction of the distance between the two first spoiler strips 371 is opposite to the increasing direction of the distance between the two second spoiler strips 381.

[0063] When the cooling liquid flows along the inner circumferential wall of the cooling pipe 31, the inner circumferential wall of the cooling pipe 31 has a friction effect on the cooling liquid, thereby reducing the flow speed of the cooling liquid on the inner circumferential wall of the cooling pipe 31. Thus, the easily flowing cooling liquid is separated from the inner circumferential wall of the cooling pipe 31, thereby affecting the heat absorption effect of the cooling liquid on the high-voltage cable.

[0064] And by arranging the spoiler in the corrugation of the cooling pipe 31, on the one hand, the effective contact area of the cooling liquid with the cooling pipe 31 is increased. On the other hand, when the cooling liquid flows through the gap between the two spoiler strips, and the distance between the two spoiler strips becomes smaller and smaller, the cooling liquid close to the spoiler strip will be accelerated, thereby causing the cooling liquid to flow turbulently on the surface of the cooling pipe 31; thereby causing the cooling liquid to have a vortex effect, so that cooling liquid of different heights can flow up and down, improving the heat absorption effect of the cooling liquid on the high-voltage cable; at the same time, the adhesion effect of the cooling liquid to the inner circumferential wall of the cooling pipe 31 is also improved, further improving the heat absorption effect of the cooling liquid on the binding area of the high-voltage cable.

[0065] Referring to FIG. 3 and FIG. 4, since the mass 35 reciprocates in the cooling pipe 31, the cooling liquid flows forward or reversely in the cooling pipe 31. And by arranging the first spoiler 37 and the second spoiler 38 spaced apart, the accelerating and disturbing effect of the spoiler on the cooling liquid is improved.

[0066] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high-voltage wire harness for use in a new energy vehicle, characterized by: The application relates to a cable unit (1), a binding member (2) and a cooling assembly (3); the cable units (1) are arranged in the same direction, and the cable units (1) are arranged on the periphery of the cooling assembly (3) and are in heat conduction contact with the cooling assembly (3); the binding member (2) is arranged on the periphery of the cable units (1) and is used for fixing the positions of the cable units (1) and the cooling assembly (3); the cooling assembly (3) comprises a cooling pipe (31) and cooling liquid, the cooling pipe (31) is internally provided with a containing cavity (311) containing the cooling liquid, the cooling pipe (31) is in heat conduction contact with the cable units (1), and the end of the cooling pipe (31) extends to the two sides of the binding member (2).

2. The high-voltage wire harness for use in a new energy vehicle according to claim 1, characterized in that: The cooling assembly (3) further comprises a limiting member (34) and a mass block (35); the mass block (35) is arranged in the cooling pipe (31) and is used for pushing the cooling liquid to flow; the mass block (35) has a gap for the transmission of the cooling liquid on the inner side wall of the cooling pipe (31); the limiting member (34) is arranged on the moving path of the mass block (35) and is fixedly connected with the inner side wall of the cooling pipe (31); the limiting member (34) is used for abutting against the mass block (35) and blocking the movement of the mass block (35).

3. The high-voltage wire harness for use in a new energy vehicle according to claim 2, characterized in that: The cooling assembly (3) further comprises elastic members (36), and the elastic members (36) are arranged on the two sides of the mass block (35); one end of the elastic member (36) is fixedly connected with the mass block (35), and the other end of the elastic member (36) is fixedly connected with the limiting member (34).

4. The high-voltage wire harness for use in a new energy vehicle according to claim 2, characterized in that: The cooling assembly (3) further comprises a partition plate (33), the partition plate (33) is arranged in the cooling pipe (31) and is fixedly connected with the inner peripheral wall of the cooling pipe (31); the partition plate (33) divides the inner cavity of the cooling pipe (31) into a first cooling channel (3111) and a second cooling channel (3112) which are in communication, and the cooling liquid flows along the first cooling channel (3111) and the second cooling channel (3112); the limiting member (34) and the mass block (35) are arranged in the first cooling channel (3111).

5. The high-voltage wire harness for use in a new energy vehicle according to claim 2, characterized in that: The limiting member (34) is a limiting ring, and a plurality of avoiding notches (341) are arranged at intervals in the limiting member (34); the avoiding notches (341) are used for the flow of the cooling liquid.

6. The high-voltage wire harness for use in a new energy vehicle according to claim 2, characterized in that: A plurality of turbulence elements are arranged at intervals along the inner wall of the cooling pipe (31) in the flow direction of the cooling liquid, and the turbulence elements are fixedly connected to the inner wall of the cooling pipe (31); each turbulence element comprises two oppositely arranged turbulence strips, and a gap for the cooling liquid is arranged between the two turbulence strips; the distance between the two turbulence strips increases.

7. The new energy vehicle inner high-voltage wire harness according to claim 6, characterized in that: The turbulence elements comprise a first turbulence element (37) and a second turbulence element (38), and the first turbulence element (37) is arranged at intervals with the second turbulence element (38); the first turbulence element (37) comprises two oppositely arranged first turbulence strips (371), the second turbulence element (38) comprises two oppositely arranged second turbulence strips (381), and the increasing direction of the distance between the two first turbulence strips (371) is opposite to the increasing direction of the distance between the two second turbulence strips (381).

8. The new energy vehicle inner high-voltage wire harness according to claim 1, characterized in that: The cooling assembly (3) further comprises a plurality of heat dissipation fins (32) fixedly arranged at intervals on the outer periphery of the two sides of the cooling pipe (31).

9. The new energy vehicle inner high-voltage wire harness according to claim 8, characterized in that: The cooling pipe (31) comprises a first pipe section (312), a second pipe section (313) and a transition pipe section (314) connected in series, the second pipe section (313) and the transition pipe section (314) are each provided with two, the two second pipe sections (313) are arranged on the two sides of the first pipe, the transition pipe section (314) is fixedly arranged between the first pipe and the second pipe section (313), the cross-sectional area of the first pipe is larger than the cross-sectional area of the second pipe section (313), and the cross-sectional area of the transition pipe section (314) increases in the direction from the second pipe section (313) to the first pipe; the first pipe is used for abutting against the cable unit (1), a plurality of heat dissipation fins (32) are arranged at intervals on the outer periphery of the second pipe section (313), and the distance from the outer periphery of the heat dissipation fin (32) to the central axis of the cooling pipe (31) is smaller than the distance from the outer periphery of the first pipe to the central axis of the cooling pipe (31).

10. The new energy vehicle inner high-voltage wire harness according to claim 1, characterized in that: The cooling assembly (3) further comprises a heat-conducting adhesive tape (4), one side of the heat-conducting adhesive tape (4) is bonded to the outer periphery wall of the cooling pipe (31), the other side of the heat-conducting adhesive tape (4) abuts against the cable unit (1), and the heat-conducting adhesive tape (4) is provided with a receiving groove (41) for accommodating the cable unit (1).

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