WO2024001706A1

WO2024001706A1 - Multi-core flat liquid-cooled cable

Info

Publication number: WO2024001706A1
Application number: PCT/CN2023/098795
Authority: WO
Inventors: 王超
Original assignee: 长春捷翼汽车科技股份有限公司
Priority date: 2022-06-29
Filing date: 2023-06-07
Publication date: 2024-01-04
Also published as: CN115171962A

Abstract

Disclosed in the present invention is a multi-core flat liquid-cooled cable, comprising a rectangular jacket and at least two rectangular wires arranged in the rectangular jacket. An accommodating cavity is formed between the inner wall of the rectangular jacket and the outer walls of the rectangular wires. At least one first supporting rib is arranged between the outer walls of the two adjacent rectangular wires and the inner wall of the rectangular jacket. At least one second supporting rib is arranged between the outer walls of the rectangular wires. The first supporting rib and the second supporting rib separate the accommodating cavity into a plurality of liquid cooling channels. According to the multi-core flat liquid-cooled cable of the present disclosure, the rectangular wires are arranged in the rectangular jacket by means of the first supporting rib and the second supporting rib, and the accommodating cavity is separated by the first supporting rib and the second supporting rib into the liquid cooling channels, heat generated in a working process of the rectangular wires is taken away by a cooling liquid flowing through the liquid cooling channels, the heat dissipation effect is greatly enhanced, and the current-carrying capacity of the liquid-cooled cable is improved.

Description

A multi-core flat liquid cooling cable

Related applications

This application claims the priority of the Chinese invention patent with patent application number 2022107462449, application date is June 29, 2022, and the invention name is "A multi-core flat liquid-cooled cable".

Technical field

The present invention relates to the technical field of cables, and more specifically, to a multi-core flat liquid-cooled cable.

Background technique

Cables generally include conductors, insulation, and sheaths. When transmitting current, the conductors will generate heat due to their own resistance. The current charging speed of new energy vehicles is slow, and using high-power charging to increase charging speed is the future development trend. The greater the power, the greater the heat of the cable itself. Increasing the wire diameter will increase the weight of the cable, and the heat dissipation capacity of the cable itself is limited. The current carrying capacity of the cable is low, and the heating of the wire core will accelerate the aging of the insulation and sheath, reducing their service life.

Therefore, relying on many years of experience and practice in related industries, the inventor proposes a multi-core flat liquid-cooled cable to overcome the shortcomings of the existing technology.

Contents of the invention

An object of the present invention is to provide a new technical solution for multi-core flat liquid-cooled cables.

According to the present invention, a multi-core flat liquid-cooled cable is provided, including a rectangular sheath, and at least two rectangular wires disposed inside the rectangular sheath, the inner wall of the rectangular sheath and the outer wall of the rectangular wire A receiving cavity is provided between them; at least one first support rib is provided between the outer wall of each rectangular conductor and the inner wall of the rectangular sheath, and at least one second support rib is provided between the outer walls of two adjacent rectangular conductors. The first support rib and the second support rib divide the accommodation cavity into a plurality of liquid cooling channels.

Optionally, the rectangular wire is a solid or hollow rectangular conductor, and one end of the first support rib and the second support rib is connected to the outer wall of the rectangular conductor.

Optionally, the rectangular conductor includes an inner solid or hollow rectangular conductor and an insulation layer covering the outer periphery of the rectangular conductor, and one end of the first support rib and the second support rib is insulated from the layer connection.

Optionally, the rectangular sheath is a conductive sheath, and both ends of the first support rib are respectively connected to the inner wall of the conductive sheath and the outer wall of the rectangular wire.

Optionally, the rectangular sheath includes an insulating sheath and a conductive sheath covering the outer periphery of the insulating sheath, and the two ends of the first support rib are respectively connected to the inner wall of the insulating sheath and the outer wall of the rectangular conductor. connect.

Optionally, the rectangular sheath includes a conductive sheath and an insulating sheath covering the outer periphery of the conductive sheath, and the two ends of the first support rib are respectively in contact with the inner wall of the conductive sheath and the outer wall of the rectangular wire connect.

Optionally, the conductive sheath is made of metal casing, conductive plastic casing, metal foil wrapped tape layer, metal wire braided casing, conductive paint layer or conductive plating layer.

Optionally, a through hole is provided on at least one of the first support ribs or the second support rib to connect at least two of the liquid cooling channels.

Optionally, the sum of the cross-sectional areas of the through holes provided on the first support rib accounts for less than or equal to 90% of the area of the first support rib; the sum of the cross-sectional areas of the through holes provided on the second support rib is and account for less than or equal to 90% of the area of the second support rib.

Optionally, cooling liquid flows inside the liquid cooling channel, and the flow direction of the cooling liquid in at least one of the liquid cooling channels is different from the flow direction of the cooling liquid in the other liquid cooling channels.

Optionally, the flow rate of the cooling liquid in the liquid cooling channel is 0.5ml/s-50ml/s.

Optionally, the cooling rate of the cooling liquid is 0.05k/s-5k/s.

Optionally, the first support rib and the second support rib are integrally formed with the rectangular conductor and/or the rectangular sheath using an extrusion or injection molding method.

Optionally, the ratio of the thickness of the first support rib to the thickness of the rectangular conductor is 1:10 to 1:2; the ratio of the thickness of the second support rib to the thickness of the rectangular conductor is 1: 10~1:2.

Optionally, the proportion of the accommodation cavity to the internal area of the rectangular sheath is 15% to 75%.

A multi-core flat liquid-cooled cable according to the present disclosure has the following technical effects:

1. A multi-core flat liquid-cooled cable of the present invention. The rectangular conductor is arranged in the rectangular sheath through the first support rib and the second support rib, and at least two liquid-cooling channels are formed by dividing the accommodation cavity. The second support rib forms a gap between the rectangular conductors, and allows the coolant to flow through the liquid cooling channel to take away the heat generated during the operation of the rectangular conductors, greatly enhancing the heat dissipation effect and improving the current carrying capacity of the liquid cooling cable. When the same amount of current flows, compared with the wire diameter of a cable without a liquid-cooling channel, the multi-core flat liquid-cooled cable of the present invention has a smaller wire diameter, saving the use of core conductor materials. Makes the cable lighter and easier to use.

2. By setting up a conductive sheath, the electromagnetic interference generated during use of the cable can be shielded to avoid interference with other instruments and equipment. The shielding layer can reduce the interference of electromagnetic radiation generated by cables to other electrical devices in the car.

Other features of the invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Figure 1 is a schematic structural diagram of the multi-core flat liquid cooling cable of the present invention in which the rectangular wire is a solid rectangular conductor and the rectangular sheath is a conductive sheath;

Figure 2 is a schematic structural diagram of the multi-core flat liquid-cooled cable of the present invention in which the rectangular conductor is a solid rectangular conductor, and the rectangular sheath includes a conductive sheath and an insulating sheath from the inside out;

Figure 3 is a schematic structural diagram of the multi-core flat liquid-cooled cable of the present invention in which the rectangular conductor is a solid rectangular conductor and an insulating layer, and the rectangular sheath includes an insulating sheath and a conductive sheath from the inside out;

Figure 4 is a schematic structural diagram of the multi-core flat liquid-cooled cable of the present invention in which the rectangular conductor is a hollow rectangular conductor and an insulating layer, and the rectangular sheath includes a conductive sheath and an insulating sheath from the inside out;

Figure 5 is a schematic structural diagram of the multi-core flat liquid-cooled cable of the present invention in which the rectangular conductor is a solid rectangular conductor and an insulating layer, and the rectangular sheath includes an insulating sheath and a conductive sheath from the inside out;

Figure 6 is a schematic structural diagram of a multi-core flat liquid-cooled cable in which part of the first support ribs in Figure 5 are provided with through holes;

Figure 7 is a schematic structural diagram of a multi-core flat liquid-cooled cable in which some of the first support ribs and the second support ribs are provided with through holes in Figure 5;

Figure 8 is a schematic structural diagram of the multi-core flat liquid cooling cable of the present invention including three rectangular conductors;

Figure 9 is a schematic structural diagram of the first support rib of the multi-core flat liquid-cooling cable of the present invention after being provided with through holes.

Marked in the figure are as follows:

11-Conductive sheath; 12-Insulating sheath; 2-Rectangular wire; 21-Rectangular conductor; 22-Insulation layer; 3-Accommodating cavity; 4-First support rib; 5-Second support rib; 6-Through hole .

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values set forth in these examples do not limit the scope of the invention unless otherwise specifically stated.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered a part of the specification.

In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.

A multi-core flat liquid-cooled cable of the present disclosure, as shown in Figures 1 to 8, includes a rectangular sheath, and at least two rectangular wires 2 arranged inside the rectangular sheath. The rectangular sheath A receiving cavity 3 is provided between the inner wall and the outer wall of the rectangular conductor 2; at least one first support rib 4 is provided between the outer wall of each rectangular conductor 2 and the inner wall of the rectangular sheath, and the outer walls of two adjacent rectangular conductors 2 At least one second support rib 5 is disposed therebetween. The first support rib 4 and the second support rib 5 divide the accommodation cavity 3 into a plurality of liquid cooling channels.

During specific implementation, in the multi-core flat liquid-cooled cable of the present invention, the rectangular conductor 2 is arranged in the rectangular sheath through the first support rib 4 and the second support rib 5, and the liquid cooling channel is formed by dividing the accommodation cavity 3 , use the second support rib 5 to form a gap between each rectangular conductor 2, and use the cooling liquid to flow through the liquid cooling channel to take away the heat generated during the operation of the rectangular conductor 2, greatly enhancing the heat dissipation effect and improving the liquid cooling cable The current-carrying capacity of the multi-core flat liquid-cooled cable of the present invention is smaller than that of a cable without a liquid-cooling channel when the same amount of current flows through it, saving wires. The use of core guide material makes the cable lighter and easier to use.

In an embodiment of a multi-core flat liquid-cooled cable of the present disclosure, the rectangular conductor 2 is a solid or hollow rectangular conductor 21, and one end of the first support rib 4 and the second support rib 5 are connected to The outer walls of the rectangular conductor 21 are connected.

During specific implementation, the first support rib 4 and the second support rib 5 can separate the accommodation cavity 3 to form at least two independent liquid cooling channels. The liquid cooling channel flows through the cooling liquid and can carry the rectangular wire 2 generated during the working process. The heat is increased, the heat dissipation effect is enhanced, and the current carrying capacity of the rectangular conductor 2 is improved.

The first support ribs 4 and the second support ribs 5 are made of insulating materials and are used to separate the rectangular conductors 2. The coolant is an insulating material and plays an insulating role between the rectangular conductors 2. Since the coolant directly It is in contact with the outer wall of the rectangular wire 2, so the coolant can quickly take away the heat generated when the rectangular wire 2 is working, and the heat dissipation effect is better.

The rectangular conductor 2 can be a solid rectangular conductor 21, as shown in Figures 1 and 2. Since the outer circumference of the rectangular conductor 21 is relatively large, the area of the outer surface of the rectangular conductor 2 is relatively large, and the coolant can pass through it. The heat generated during operation of the rectangular conductor 2 is taken away by circulation in the liquid cooling channel, thereby improving the current carrying capacity of the cable.

When the rectangular conductor 2 is a hollow conductor, as shown in Figure 4, the inner hollow can circulate air or coolant, which can further cool down the rectangular conductor 2, take away the heat generated by the rectangular conductor 2, and improve the current carrying capacity of the cable. .

In an embodiment of a multi-core flat liquid-cooled cable of the present disclosure, the rectangular conductor 2 includes an internal solid or hollow rectangular conductor 21 and an insulating layer 22 covering the outer periphery of the rectangular conductor 21. The third One end of a supporting rib 4 and the second supporting rib 5 is connected to the insulating layer 22 .

In specific implementation, as shown in Figures 3 to 8, the outside of the solid rectangular conductor 21 or the hollow rectangular conductor 21 is covered with an insulating layer 22, and the cooling liquid flows through the outside of the insulating layer 22, which can quickly take away the heat generated by the rectangular conductor 2. Heat, improve the current carrying capacity of the rectangular conductors 2, by setting the insulation layer 22 on the outside of the rectangular conductors 2, further ensure that the rectangular conductors 2 are in an insulated state, prevent short circuits between the rectangular conductors 2, and avoid burning accidents in the circuit Casualties.

In an embodiment of a multi-core flat liquid-cooled cable disclosed in the present disclosure, the rectangular sheath is a conductive sheath 11, and both ends of the first support rib 4 are respectively connected to the inner wall and the conductive sheath 11. The outer walls of the rectangular wires 2 are connected.

In specific implementation, as shown in Figure 1, the rectangular sheath is a conductive sheath 11, which can be used as a shielding layer to shield electromagnetic interference generated during use of the cable to avoid interference with other instruments and equipment. The shielding layer can reduce the interference of electromagnetic radiation generated by cables to other electrical devices in the car.

The conductive sheath 11 not only plays a shielding role, but also protects the internal structure of the cable. There is no need to set up a separate shielding layer, which reduces the production process of the cable, reduces the investment in shielding layer production equipment, and can reduce material costs, and Reduce the use of processing equipment. At the same time, liquid cooling reduces the diameter of the cable, making the cable lighter and easier to use.

In one embodiment of the disclosed multi-core flat liquid-cooled cable, as shown in Figures 3, 5, 7, and 8, the rectangular sheath includes an insulating sheath 12 and a sheath covering the insulating sheath. 12 on the outer periphery of the conductive sheath 11, the two ends of the first support rib 4 are respectively connected to the inner wall of the insulating sheath 12 and the outer wall of the rectangular conductor 2.

In specific implementation, the rectangular sheath includes an insulating sheath 12 and a conductive sheath 11 covering the outer periphery of the insulating sheath 12. By arranging the insulating sheath 12 inside the rectangular sheath, it can further insulate and ensure that the rectangular conductor 2. Be insulated from the outside world to avoid casualties and losses.

The conductive sheath 11 covering the outer periphery of the insulating sheath 12 is used as a shielding layer to shield electromagnetic interference generated during use of the cable and avoid interference with other instruments and equipment. The shielding layer can reduce the interference of electromagnetic radiation generated by cables to other electrical devices in the car.

In an embodiment of a multi-core flat liquid-cooled cable of the present disclosure, as shown in Figures 2, 4, and 6, the rectangular sheath includes a conductive sheath 11 and covers the outer periphery of the conductive sheath 11 The insulating sheath 12 has two ends connected to the inner wall of the conductive sheath 11 and the outer wall of the rectangular conductor 2 respectively.

During specific implementation, the conductive sheath 11 located inside the rectangular sheath can be used as a shielding layer to shield electromagnetic interference generated during use of the cable to avoid interference with other instruments and equipment. The shielding layer can reduce the interference of electromagnetic radiation generated by cables to other electrical devices in the car. The insulating sheath 12 covering the outside of the conductive sheath 11 can insulate the outside of the cable, ensuring that the rectangular conductor 2 is insulated from the outside world, thereby avoiding casualties and losses.

Further, the conductive sheath 11 is made of metal casing, conductive plastic casing, metal foil wrapped tape layer, metal wire braided casing, conductive paint layer or conductive plating layer.

During specific implementation, the electromagnetic interference generated during use of the cable can be shielded by the conductive sheath 11 to avoid interference with other instruments and equipment. The conductive sheath 11 can reduce the interference of electromagnetic radiation generated by the cable to other electrical devices in the vehicle.

The use of conductive plastic sleeves, conductive paint or conductive plating reduces the use of shielding net preparation equipment, occupies a small area, reduces cable processing costs, and reduces cable production costs.

The metal sleeve improves the shielding effect of the shielding layer, so that there is no dead space around the cable to shield, and prevents the electromagnetic field generated when the cable is working from interfering with the use of external power settings, thereby achieving a complete shielding effect.

During the winding process of the metal foil wrapping tape layer, the wrapping tape is stacked and spirally wound on the inside of the insulating sheath 12 or on the outside of the insulating sheath 12, so that the shielding effect is better.

The metal wire braided casing has good flexibility, does not hinder the bending of the cable, and can reduce the interference of electromagnetic radiation generated by the cable to other electrical devices in the car.

In an embodiment of a multi-core flat liquid-cooled cable of the present disclosure, as shown in Figures 6 and 7, when multiple first support ribs 4 are provided, at least one of the first support ribs 4 or The second support rib 5 is provided with a through hole 6 to connect at least two of the liquid cooling channels.

By arranging a number of through holes 6 on the first support rib 4 or the second support rib 5 so that adjacent accommodation cavities 3 are connected through the through holes 6, at least two liquid cooling channels can be formed in the accommodation cavity 3, which is beneficial to cooling. The liquid flows into one liquid cooling channel and flows out from the other liquid cooling channel. Simplify the coolant flow loop and use the coolant flow to take away the heat generated by the liquid cooling cable.

Figure 9 is a schematic structural diagram of the first support rib 4 after the through hole 6 is provided. The first support rib 4 can not only connect the rectangular conductor 2 and the inner wall of the rectangular sheath, but also connect adjacent adjacent ones through the through hole 6. Two liquid cooling channels.

The second support rib 5 is provided with a through hole 6, which can also serve to connect the rectangular wire 2 and the inner wall of the rectangular sheath, and can also connect two adjacent liquid cooling channels through the provided through hole 6. The second support rib 5 The manner of arranging the through holes 6 is substantially the same as the manner of arranging the through holes 6 on the first support rib 4 and is not shown in separate figures.

Further, the sum of the cross-sectional areas of the through holes 6 provided on the first support rib 4 accounts for less than or equal to 90% of the area of the first support rib 4; the through holes 6 provided on the second support rib 5 are The sum of the cross-sectional areas accounts for less than or equal to 90% of the area of the second support rib 5 .

The sum of the cross-sectional areas of the through holes 6 provided on the first support rib 4 accounts for less than or equal to 90% of the area of the first support rib 4. If the sum of the cross-sectional areas of the through holes 6 is too large, the first support The support force of the ribs 4 will be insufficient. In order to select a reasonable sum of the cross-sectional areas of the through holes 6, the inventor conducted relevant tests. The experimental method was to select the same multi-core flat liquid-cooled cable and only focus on the first support rib 4. The sum of the cross-sectional areas of the through holes 6 is adjusted, and a force of 80N is applied to the outside of the first support rib 4. Whether the liquid cooling channels on both sides of the first support rib 4 are deformed? If the liquid cooling channel is not deformed, qualified. The results are shown in Table 1.

Table 1: The influence of the sum of the cross-sectional areas of the through holes 6 provided on the first support rib 4 to the area of the first support rib 4 on whether the liquid cooling channel is deformed

As can be seen from Table 1 above, when the sum of the cross-sectional areas of the through holes 6 accounts for more than 90% of the area of the first support ribs 4, the liquid cooling channel will deform under the force of 80N, which will have many effects. For normal use of core flat liquid-cooled cables, the inventor prefers that the sum of the cross-sectional areas of the through holes 6 provided on the first support rib 4 accounts for less than or equal to 90% of the area of the first support rib 4 .

Using the same experimental method, it can be obtained that the sum of the cross-sectional areas of the through holes 6 provided on the second support rib 5 accounts for less than or equal to 90% of the area of the second support rib 5 . For the sake of brevity, no further details will be given.

In an embodiment of the multi-core flat liquid-cooling cable of the present disclosure, cooling liquid flows inside the liquid cooling channel, and the flow direction of the cooling liquid in at least one of the liquid cooling channels is different from that of the other liquid cooling channels. The cooling liquid in the cold channel has different flow directions.

During specific implementation, each independent liquid cooling channel formed inside the liquid cooling cable is divided into two parts: a liquid inlet channel and a liquid outlet channel, which can form a liquid cooling cycle inside the cable and take away the heat generated by the rectangular conductor 2 during operation. , there is no need to add a circulation loop outside the cable, and the internal structure of the liquid-cooled cable is simplified.

Further, the flow rate of the cooling liquid in the liquid cooling channel is 0.5ml/s-50ml/s.

In order to verify the influence of the flow rate of coolant in the liquid cooling channel on the temperature rise of multi-core flat liquid-cooled cables, the inventor selected multiple groups of multi-core flat liquid-cooled cables with the same material and size. At this time, the same cables were connected. Current and coolant use different flow rates through the liquid cooling channel, for multi-core flat liquid cooling cables Carry out cooling, and read the temperature rise value of each multi-core flat liquid-cooled cable, and record it in Table 2.

The experimental method is to flow the coolant through the multi-core flat liquid-cooling cable of the liquid-cooling channel at different flow rates in a closed environment, conduct the same current, and record the temperature before power on and the temperature after power on when the temperature is stable. And take the difference to get the absolute value. In this embodiment, a temperature rise of less than 50K is considered a qualified value.

Table 2: Effect of coolant flowing through the liquid cooling channel at different flow rates on the temperature rise of multi-core flat liquid-cooled cables

ring

As can be seen from Table 2 above, when the flow rate of the liquid cooling channel is less than 0.5ml/s, the temperature rise value of the multi-core flat liquid cooling cable is unqualified. When the flow rate of the coolant in the liquid cooling channel is greater than or equal to 0.5ml /s, the temperature rise value of the multi-core flat liquid-cooled cable is qualified. However, when the flow rate is greater than 50ml/s, the temperature rise of the multi-core flat liquid-cooled cable does not drop significantly, and the greater the flow rate, the lower the temperature rise of the liquid-cooled cable. The quality requirements of the channels and the quality of the circulation pump that circulates the coolant will further increase, while at this time the temperature rise of the multi-core flat liquid cooling cable has not changed significantly. Therefore, the inventor set the flow rate of the cooling liquid in the liquid cooling channel to 0.5ml/s-50ml/s.

Further, the cooling rate of the cooling liquid is 0.05k/s-5k/s.

In order to verify the influence of the cooling rate of the coolant on the temperature rise of multi-core flat liquid-cooled cables, the inventor selected multiple groups of multi-core flat liquid-cooled cables with the same material and size, conducted the same current, and the coolant cooled at different rates. The multi-core flat liquid-cooled cable is cooled at a certain rate through the liquid cooling channel, and the temperature rise value of each multi-core flat liquid-cooled cable is read and recorded in Table 3.

The experimental method is to conduct the same current through multi-core flat liquid-cooled cables with different cooling rates in a closed environment, record the temperature before power on and the temperature after power on when the temperature is stable, and take the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is considered a qualified value.

Table 3: Effect of different cooling rates on the temperature rise of multi-core flat liquid-cooled cables

As can be seen from Table 3 above, when the cooling rate is less than 0.05°C/min, the temperature rise value of the multi-core flat liquid-cooled cable is unqualified. When the cooling rate is greater than or equal to 0.05°C/min, the temperature rise value of the multi-core flat liquid-cooled cable is The temperature rise value of the cable is qualified. However, when the cooling rate is greater than 5°C/min, the temperature rise of the multi-core flat liquid cooling cable does not drop significantly, and the greater the cooling rate, the quality requirements for the liquid cooling channel and the flow rate of the coolant The requirements will be further improved, but at this time the temperature rise of the multi-core flat liquid-cooled cable has not changed significantly. Therefore, the inventor set the cooling rate of the coolant to 0.05k/s-5k/s.

In an embodiment of a multi-core flat liquid-cooling cable disclosed in the present disclosure, the first support rib 4 and the second support rib 5 are extruded with the rectangular conductor 2 and/or the rectangular sheath. Or one-piece molding by injection molding.

By integrating the first support rib 4, the second support rib 5, the rectangular conductor 2 and the rectangular sheath by extrusion or injection molding, the stability of the multi-core flat cable structure can be enhanced.

In an embodiment of the multi-core flat liquid-cooled cable disclosed in the present disclosure, the ratio of the thickness of the first support rib 4 to the thickness of the rectangular conductor 21 is 1:10˜1:2; the second The ratio of the thickness of the support rib 5 to the thickness of the rectangular conductor 21 is 1:10˜1:2.

In order to verify the influence of the ratio of the thickness of the first support rib 4 to the thickness of the rectangular conductor 21 on the temperature rise of the multi-core flat liquid-cooled cable, the inventor selected multi-core flat cables with the same cross-sectional area, the same material and the same length. Liquid-cooled cable, in the experiment to verify the ratio of the thickness of the first support rib 4 to the thickness of the rectangular conductor 21, the ratio of the thickness of the second support rib 5 to the thickness of the rectangular conductor 21 was set to 1:2. Make changes. Each group of tests uses multi-core flat liquid-cooled cables to conduct the same current, and the coolant with the same flow rate circulates in the liquid-cooling channel. The multi-core flat liquid-cooled cables are cooled, and each multi-core flat liquid-cooled cable is read. The temperature rise value of the liquid-cooled cable is recorded in Table 4. The thickness of the first support rib 4 and the thickness of the rectangular conductor 21 will be described here. The thickness of the first support rib 4 refers to the size of the side connecting the first support rib 4 and the rectangular conductor 21. The thickness of the rectangular conductor 21, refers to the size of the short side on the cross section of the rectangular conductor 21.

The experimental method is to conduct multi-core flat liquid-cooled cables with the same flow rate of coolant in a closed environment and conduct the same current, and record the temperature before power on and the temperature after power on when the temperature is stable. And take the difference to get the absolute value. In this embodiment, a temperature rise of less than 50K is considered a qualified value.

A force of 80N is applied to the outside of the first support rib 4. Whether the first support rib 4 is deformed? If the first support rib 4 is deformed, it is unqualified.

Table 4: The ratio of the thickness of the first support rib 4 to the thickness of the rectangular conductor 21 for multi-core flat liquid cooling

Effect of cable temperature rise

As can be seen from Table 4 above, when the ratio of the thickness of the first support rib 4 to the thickness of the rectangular conductor 21 is greater than 1:2, the temperature rise value of the multi-core flat liquid-cooled cable is unqualified. When the ratio of the thickness of the rib 4 to the thickness of the rectangular conductor 21 is less than 1:11, if a force of 80N is applied to the outside of the first support rib 4, the first support rib 4 will deform. Therefore, the inventor chooses the ratio of the thickness of the first support rib 4 to the thickness of the rectangular conductor 21 to be 1:10˜1:2.

Using the same experimental method, it can be concluded that the ratio of the thickness of the second support rib 5 to the thickness of the rectangular conductor 21 is 1:10˜1:2, and the experimental process will not be repeated here.

In an embodiment of the multi-core flat liquid-cooled cable disclosed in the present disclosure, the proportion of the accommodation cavity 3 to the internal area of the rectangular sheath is 15% to 75%.

In order to verify the influence of the ratio of the accommodation cavity 3 to the internal area of the rectangular sheath on the temperature rise of the multi-core flat liquid-cooled cable, the inventor selected multiple sets of rectangular conductors 21 with the same internal area and material, and only The cross-sectional area of the rectangular conductor 21 is adjusted. The ratio of the first support rib 4 and the second support rib 5 to the thickness of the rectangular conductor 21 is in the range of 1:10 to 1:2. No special agreement is made. In the group test, multi-core flat liquid-cooled cables are used to conduct the same current, and the coolant with the same flow rate is circulated in the liquid-cooling channel. The multi-core flat liquid-cooled cables are cooled, and each multi-core flat liquid-cooled cable is read. The temperature rise value is recorded in Table 5

The experimental method is to use multi-core flat liquid cooling with accommodation cavities 3 of different areas in a closed environment. The cable conducts the same current, records the temperature before power on and the temperature after power on when the temperature is stable, and takes the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is considered a qualified value.

Table 5: The effect of the ratio of the accommodation cavity to the internal area of the rectangular sheath on the temperature rise of multi-core flat liquid-cooled cables

As can be seen from Table 5 above, when the proportion of the accommodation cavity 3 to the internal area of the rectangular sheath is less than 15%, the temperature rise value of the multi-core flat liquid-cooled cable is unqualified. When the proportion of the accommodation cavity 3 to the internal area of the rectangular sheath is When the temperature rise value of the multi-core flat liquid-cooled cable is greater than or equal to 15%, the temperature rise value of the multi-core flat liquid-cooled cable is qualified. However, when the proportion of the accommodation cavity 3 to the internal area of the rectangular sheath is greater than 75%, the temperature rise of the multi-core flat liquid-cooled cable does not decrease. Moreover, the larger the proportion of the accommodation cavity 3 to the internal area of the rectangular sheath, the larger the outer diameter of the multi-core flat liquid-cooled cable, which will adversely affect the wiring and installation of the multi-core flat liquid-cooled cable in subsequent use. This increases the difficulty of installation and reduces the flexibility of the multi-core flat liquid-cooled cable during use. Therefore, the inventor sets the ratio of the accommodation cavity 3 to 15%-75% of the internal area of the rectangular sheath.

Although some specific embodiments of the invention have been described in detail by way of examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the invention. Those skilled in the art will understand that the above embodiments can be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A multi-core flat liquid-cooled cable, characterized in that it includes a rectangular sheath, and at least two rectangular conductors arranged inside the rectangular sheath, between the inner wall of the rectangular sheath and the outer wall of the rectangular conductor A receiving cavity is provided; at least one first support rib is provided between the outer wall of each rectangular conductor and the inner wall of the rectangular sheath, and at least one second support rib is provided between the outer walls of two adjacent rectangular conductors, and the first The support rib and the second support rib divide the accommodation cavity into a plurality of liquid cooling channels.
The multi-core flat liquid-cooled cable according to claim 1, wherein the rectangular conductor is a solid or hollow rectangular conductor, and one end of the first support rib and the second support rib are connected to the rectangular conductor. The outer wall of the conductor is connected.
The multi-core flat liquid-cooled cable according to claim 1, wherein the rectangular conductor includes an internal solid or hollow rectangular conductor and an insulation layer covering the outer periphery of the rectangular conductor, and the first support rib And one end of the second support rib is connected to the insulation layer.
The multi-core flat liquid-cooled cable according to claim 1, wherein the rectangular sheath is a conductive sheath, and both ends of the first support rib are respectively connected to the inner wall of the conductive sheath and the rectangular sheath. The wires are connected to the outer wall.
The multi-core flat liquid-cooled cable according to claim 1, wherein the rectangular sheath includes an insulating sheath and a conductive sheath covering the outer periphery of the insulating sheath, and both ends of the first support rib They are respectively connected to the inner wall of the insulating sheath and the outer wall of the rectangular conductor.
The multi-core flat liquid-cooled cable according to claim 1, wherein the rectangular sheath includes a conductive sheath and an insulating sheath covering the outer periphery of the conductive sheath, and both ends of the first support rib They are respectively connected to the inner wall of the conductive sheath and the outer wall of the rectangular wire.
The multi-core flat liquid-cooling cable according to any one of claims 4 to 6, characterized in that the conductive sheath is made of metal casing, conductive plastic casing, metal foil winding tape layer, and metal wire braided sheath. pipe, conductive paint layer or conductive plating.
The multi-core flat liquid cooling cable according to claim 1, characterized in that at least one of the first support ribs or the second support ribs is provided with a through hole to connect at least two of the liquid cooling channels. .
The multi-core flat liquid-cooled cable according to claim 8, wherein the sum of the cross-sectional areas of the through holes provided on the first support ribs accounts for less than or equal to 90% of the area of the first support ribs; Place The sum of the cross-sectional areas of the through holes provided on the second support ribs accounts for less than or equal to 90% of the area of the second support ribs.
The multi-core flat liquid-cooled cable according to claim 1, characterized in that cooling liquid flows inside the liquid cooling channel, and the flow direction of the cooling liquid in at least one of the liquid cooling channels is different from that of the other liquid cooling channels. The cooling liquid in the liquid cooling channel has different flow directions.
The multi-core flat liquid cooling cable according to claim 9, wherein the flow rate of the cooling liquid in the liquid cooling channel is 0.5ml/s-50ml/s.
The multi-core flat liquid-cooled cable according to claim 9, wherein the cooling rate of the cooling liquid is 0.05k/s-5k/s.
The multi-core flat liquid-cooled cable according to claim 1, wherein the first support rib and the second support rib and the rectangular conductor and/or the rectangular sheath are extruded or injection molded. The method is integrated.
The multi-core flat liquid-cooled cable according to claim 1, wherein the ratio of the thickness of the first support rib to the thickness of the rectangular conductor is 1:10 to 1:2; the second support The ratio of the thickness of the ribs to the thickness of the rectangular conductor is 1:10˜1:2.
The multi-core flat liquid-cooled cable according to claim 1, wherein the accommodation cavity accounts for 15% to 75% of the internal area of the rectangular sheath.