阅读说明：本技术 功率线缆及液冷电缆 (Power cable and liquid cooling cable ) 是由 谢世滨 郭水保 何英勇 石志超 杨康 王伟 纪克 于 2021-07-14 设计创作，主要内容包括：本发明提供一种功率线缆及液冷电缆,功率线缆包括绝缘套、多个子功率导体和冷却管；多个所述子功率导体环绕贴合于所述冷却管的外壁,所述绝缘套包裹设置于多个所述子功率导体的外部。液冷电缆包括外护套、正极功率线缆和负极功率线缆,所述外护套内包裹设置有所述正极功率线缆和所述负极功率线缆；所述正极功率线缆包括至少一个上述的功率线缆,所述负极功率线缆包括至少一个上述的功率线缆。本发明将功率导体与冷却管紧密贴合热交换,冷却效果好。(The invention provides a power cable and a liquid cooling cable, wherein the power cable comprises an insulating sleeve, a plurality of sub-power conductors and a cooling pipe; the plurality of sub power conductors are attached to the outer wall of the cooling pipe in a surrounding mode, and the insulating sleeve is arranged outside the plurality of sub power conductors in a wrapping mode. The liquid cooling cable comprises an outer sheath, a positive power cable and a negative power cable, wherein the positive power cable and the negative power cable are wrapped in the outer sheath; the positive power cable comprises at least one power cable, and the negative power cable comprises at least one power cable. The power conductor and the cooling pipe are tightly attached for heat exchange, and the cooling effect is good.)

1. A power cable comprising an insulating sleeve, a plurality of sub-power conductors, and a cooling tube;

the plurality of sub power conductors are attached to the outer wall of the cooling pipe in a surrounding mode, and the insulating sleeve is arranged outside the plurality of sub power conductors in a wrapping mode.

2. The power cable of claim 1, wherein the sub-power conductors and the cooling tube are each circular in cross-section.

3. A liquid-cooled cable is characterized by comprising an outer sheath, a positive power cable and a negative power cable, wherein the positive power cable and the negative power cable are wrapped in the outer sheath; the positive power cable comprises at least one power cable according to claim 1 or 2, and the negative power cable comprises at least one power cable according to claim 1 or 2.

4. The liquid-cooled cable of claim 3, wherein the outer jacket further comprises a positive auxiliary power cable, a negative auxiliary power cable, a positive auxiliary cooling pipe and a negative auxiliary cooling pipe;

the positive auxiliary power cable comprises a positive auxiliary power conductor and a positive insulating layer, and the positive insulating layer is wrapped outside the positive auxiliary power conductor;

the negative auxiliary power cable comprises a negative auxiliary power conductor and a negative insulating layer, and the negative insulating layer is wrapped outside the negative auxiliary power conductor;

the positive auxiliary cooling pipe is abutted to the positive auxiliary power cable, and the negative auxiliary cooling pipe is abutted to the negative auxiliary power cable.

5. The liquid-cooled cable of claim 4, wherein the power cables of the positive power cable and the power cables of the negative power cable are arranged in an annular array within the outer jacket, and the positive power cable and the negative power cable are arranged in a central symmetry.

6. The liquid-cooled cable of claim 5, wherein the positive auxiliary power cable, the negative auxiliary power cable, the positive auxiliary cooling tube, and the negative auxiliary cooling tube are all centered within the outer jacket; the positive power cable and the negative power cable are distributed on the outer ring in the outer sheath.

7. The liquid-cooled cable of claim 6, wherein the positive auxiliary power cable, the negative auxiliary power cable, the positive auxiliary cooling tube, and the negative auxiliary cooling tube are in a rectangular array, and the positive auxiliary power cable and the negative auxiliary power cable are arranged diagonally.

8. The liquid-cooled cable of any one of claims 4-7, wherein the positive auxiliary power cable, the negative auxiliary power cable, the positive auxiliary cooling tube, and the negative auxiliary cooling tube have the same outer diameter.

9. The liquid-cooled cable according to any one of claims 4 to 7, wherein the cooling tube of the power cable, the positive auxiliary cooling tube and the negative auxiliary cooling tube are all insulating heat-conducting members, and the cooling tube, the positive auxiliary cooling tube and the negative auxiliary cooling tube are all filled with cooling media, and the cooling media comprise water and/or ethylene glycol.

10. The liquid-cooled cable of any one of claims 3-7, further comprising ground wires, signal wires, positive auxiliary power wires, and negative auxiliary power wires interspersed within the outer jacket.

Technical Field

The invention relates to the technical field of charging cables, in particular to a power cable and a liquid cooling cable.

Background

Along with the development of new energy automobile technology, electric automobile also is more and more popularized, and in electric automobile's use, the user also is higher and higher to the requirement of quick charge, adopts small-diameter, lightweight liquid cooling cable to reduce the cable temperature and becomes the hot scheme of solving high-power charging.

At present, the primary structure of liquid cooling cable sets up inside cable and cooling tube simultaneously in the oversheath of whole cable, and the ectoderm of inside cable contacts with the outer pipe wall of cooling tube. When the internal cable core wire is connected with large current to generate heat, the heat is taken away through the heat exchange of the contact of the outer surface skin and the outer pipe wall, so that the surface temperature of the outer sheath is within the standard requirement.

However, the cooling effect of the cable in the above technical solution is poor.

Disclosure of Invention

In order to solve at least one problem mentioned in the background art, the invention provides a power cable and a liquid cooling cable, wherein a power conductor is tightly attached to a cooling pipe for heat exchange, and the cooling effect is good.

In order to achieve the above object, in a first aspect, the present invention provides a power cable comprising an insulating sheath, a plurality of sub-power conductors, and a cooling tube; the plurality of sub power conductors are attached to the outer wall of the cooling pipe in a surrounding mode, and the insulating sleeve is arranged outside the plurality of sub power conductors in a wrapping mode.

As a further aspect of the first aspect of the present invention, the sub power conductors and the cooling pipe are each circular in cross section.

In a second aspect, the invention further provides a liquid-cooled cable, which includes an outer sheath, a positive power cable and a negative power cable, wherein the positive power cable and the negative power cable are wrapped in the outer sheath; the positive power cable comprises at least one power cable, and the negative power cable comprises at least one power cable.

As a further scheme of the second aspect of the present invention, the outer sheath is further wrapped with an anode auxiliary power cable, a cathode auxiliary power cable, an anode auxiliary cooling pipe and a cathode auxiliary cooling pipe; the positive auxiliary power cable comprises a positive auxiliary power conductor and a positive insulating layer, and the positive insulating layer is wrapped outside the positive auxiliary power conductor; the negative auxiliary power cable comprises a negative auxiliary power conductor and a negative insulating layer, and the negative insulating layer is wrapped outside the negative auxiliary power conductor; the positive auxiliary cooling pipe is abutted to the positive auxiliary power cable, and the negative auxiliary cooling pipe is abutted to the negative auxiliary power cable.

As a further solution of the second aspect of the present invention, the power cables of the positive power cable and the power cables of the negative power cable are arranged in an annular array inside the outer sheath, and the positive power cable and the negative power cable are arranged in a central symmetry manner.

As a further aspect of the second aspect of the present invention, the positive auxiliary power cable, the negative auxiliary power cable, the positive auxiliary cooling pipe and the negative auxiliary cooling pipe are all located in the center of the outer sheath; the positive power cable and the negative power cable are distributed on the outer ring in the outer sheath.

As a further aspect of the second aspect of the present invention, the positive auxiliary power cable, the negative auxiliary power cable, the positive auxiliary cooling pipe, and the negative auxiliary cooling pipe are arranged in a rectangular array, and the positive auxiliary power cable and the negative auxiliary power cable are arranged diagonally.

As a further aspect of the second aspect of the present invention, the positive auxiliary power cable, the negative auxiliary power cable, the positive auxiliary cooling pipe, and the negative auxiliary cooling pipe all have the same outer diameter.

As a further aspect of the second aspect of the present invention, the cooling pipe of the power cable, the auxiliary positive cooling pipe and the auxiliary negative cooling pipe are all insulating heat conducting members, and the cooling pipe, the auxiliary positive cooling pipe and the auxiliary negative cooling pipe are all filled with a cooling medium, and the cooling medium includes water and/or ethylene glycol.

As a further solution of the second aspect of the present invention, the power cord further includes a ground wire, a signal wire, an anode auxiliary power cord and a cathode auxiliary power cord, which are dispersedly wrapped in the outer sheath.

The invention provides a power cable and a liquid cooling cable, wherein a power conductor is divided into a plurality of sub-power conductors, each sub-power conductor is directly attached to the outer wall of a cooling pipe in a surrounding mode, so that the contact area between the power conductor and the cooling pipe is increased, each sub-power conductor is directly and closely attached to the cooling pipe for heat exchange, and the cooling effect is better.

The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a power cable according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a liquid-cooling cable according to a second embodiment of the present invention;

fig. 3 is a front view of a liquid-cooled cable according to a second embodiment of the present invention.

Description of reference numerals:

1-a power cable; 11-an insulating sleeve; 12-a sub-power conductor; 13-a cooling tube;

2-an outer sheath;

3-a positive power cable; 31-positive electrode insulating sleeve; 32-positive sub-power conductor; 33-positive cooling tube;

4-a negative power cable; 41-negative pole insulation sleeve; 42-negative sub-power conductor; 43-negative cooling tube;

5-positive auxiliary power cable; 51-positive auxiliary power conductor; 52-positive electrode insulating layer;

6-a negative auxiliary power cable; 61-negative auxiliary power conductor; 62-negative electrode insulation layer;

7-a positive auxiliary cooling pipe;

8-a cathode auxiliary cooling pipe;

9-auxiliary cables.

Detailed Description

In the use process of the electric automobile, the requirement of a user on quick charging is higher and higher, and in order to realize quick high-power charging, increasing the wire diameter of a cable is a conventional choice. However, the increase of the wire diameter will bring higher cost, the increase of the outer diameter of the cable also can lead to the weight of the cable to be greatly increased, the size of the gun which is matched with the gun for use can be greatly increased, the thick and heavy cable causes that a user can not manually charge, great influence is brought to the use experience of the user, and the small wire diameter and the light liquid cooling cable are adopted to reduce the temperature of the cable to become a hot door scheme for solving the problem of high-power charging. The current liquid cooling cable technology is mainly used for carrying out heat exchange to take away a large amount of heat generated when an internal cable core wire is connected with large current through the contact of an outer skin and a cooling pipe, so that the surface temperature of an outer sheath of the whole cable is within a standard requirement. However, this method has a poor cooling effect and there is a risk that the core wire is not cooled in place because it is not in contact with the pipe.

Based on the problems, the invention provides a power cable and a liquid cooling cable, wherein the power conductor is divided into a plurality of sub-power conductors, each sub-power conductor is directly attached to the outer wall of a cooling pipe in a surrounding mode, so that the contact area between the power conductor and the cooling pipe is increased, each sub-power conductor is directly and tightly attached to the cooling pipe for heat exchange, and the cooling effect is better.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic structural diagram of a power cable according to a first embodiment of the present invention.

Referring to fig. 1, a power cable according to an embodiment of the present invention includes an insulating sheath 11, a plurality of sub power conductors 12, and a cooling pipe 13; the plurality of sub-power conductors 12 are attached to the outer wall of the cooling pipe 13 in a surrounding manner, and the insulating sleeve 11 is wrapped outside the plurality of sub-power conductors 12.

The cooling pipe 13 is located at the center, and a cooling medium is introduced into the cooling pipe 13. The power conductor is divided equally into several parts, each part serving as a sub-power conductor 12. Each sub-power conductor 12 surrounds the cooling tube 13 and is twisted around the outer wall of the cooling tube 13, and the outer part of each sub-power conductor 12 is integrally wrapped with an insulating sleeve 11. Wherein, the power conductor can be made of copper, the cooling pipe 13 can be made of hydrolysis-resistant and high-heat-conductivity insulating material, and the cooling medium can be water and/or glycol.

When each sub-power conductor 12 is connected with current to generate a large amount of heat, the cooling medium in the cooling pipe 13 is in contact with each sub-power conductor 12 through the pipe wall to exchange heat, so that the heat is taken away, and the surface temperature of the insulating sleeve 11 is within the standard requirement.

In the power cable of the embodiment, the power conductor is divided into the plurality of sub-power conductors 12 as required, each sub-power conductor 12 is directly wound around the cooling tube 13, so that the contact area between the power conductor and the cooling tube 13 is increased, and each sub-power conductor 12 is directly attached to the cooling tube 13 for heat exchange, thereby improving the cooling effect.

Further, the cross-sections of the sub power conductor 12 and the cooling pipe 13 are circular.

The sub-power conductors 12 and the cooling pipe 13 are both arranged in a cylindrical shape, so that the sub-power conductors 12 can be conveniently and tightly wound on the outer wall of the cooling pipe 13, and the close contact between the sub-power conductors and the cooling pipe is effectively ensured. The outer diameter of the optional cooling pipe 13 is 8-10 times of the outer diameter of the sub-power conductor 12, and the outer diameter of the cooling pipe 13 is far larger than that of the sub-power conductor 12, so that on one hand, the sub-power conductors 12 can be ensured to be in effective contact with the cooling pipe 13, on the other hand, the flow of a cooling medium is improved, and the heat of the sub-power conductors 12 can be fully absorbed.

Example two

Fig. 2 is a schematic structural diagram of a liquid-cooling cable according to a second embodiment of the present invention; fig. 3 is a front view of a liquid-cooled cable according to a second embodiment of the present invention.

Referring to fig. 2 and 3, on the basis of the first embodiment, a second embodiment of the present invention provides a liquid-cooled cable, including an outer sheath 2, a positive power cable 3 and a negative power cable 4, wherein the positive power cable 3 and the negative power cable 4 are wrapped in the outer sheath 2; the positive power cable 3 includes at least one power cable 1 of the first embodiment, and the negative power cable 4 includes at least one power cable 1 of the first embodiment.

The positive power cable 3 and the negative power cable 4 are each provided in the form of the power cable 1 according to the first embodiment. The positive power conductor is divided into a plurality of groups of positive sub-power conductors 32, each group of positive sub-power conductors 32 is directly wound around the corresponding positive cooling pipe 33, and a positive insulating sleeve 31 is wrapped outside each group of positive sub-power conductors 32. The contact area between the anode power conductor and the anode cooling pipe 33 is increased, and each group of anode sub-power conductors 32 directly contact with the corresponding anode cooling pipe 33 for heat exchange, so that the cooling effect is better, and the surface temperature of the anode insulating sleeve 31 is within the standard requirement.

The negative power cable 4 is correspondingly set to be the same as the positive power cable 3 in structure, and has a good cooling effect, so that the surface temperature of the negative insulating sleeve 41 is within the standard requirement.

The anode power cable 3 and the cathode power cable 4 are wrapped in the outer sheath 2, and the anode power cable 3 and the cathode power cable 4 have good cooling effects respectively, so that the surface temperature of the outer sheath 2 can be within the standard requirement, and the overall cooling effect is improved.

Further, an anode auxiliary power cable 5, a cathode auxiliary power cable 6, an anode auxiliary cooling pipe 7 and a cathode auxiliary cooling pipe 8 are wrapped in the outer sheath 2; the positive auxiliary power cable 5 comprises a positive auxiliary power conductor 51 and a positive insulating layer 52, and the positive insulating layer 52 is wrapped outside the positive auxiliary power conductor 51; the negative auxiliary power cable 6 comprises a negative auxiliary power conductor 61 and a negative insulating layer 62, and the negative insulating layer 62 is wrapped outside the negative auxiliary power conductor 61; the positive auxiliary cooling pipe 7 is disposed in abutment with the positive auxiliary power cable 5, and the negative auxiliary cooling pipe 8 is disposed in abutment with the negative auxiliary power cable 6.

Two auxiliary power cables are additionally arranged in the outer sheath, and the two auxiliary power cables are manufactured into an independent conductor and wrapped with an insulating layer, so that the liquid cooling cable can be integrally connected with a larger current, the current carrying capacity is increased, and the outer diameter is not too large. The auxiliary cooling pipe is additionally arranged to contact and exchange heat with the auxiliary power cable, so that the cooling effect can be guaranteed.

Further, the power cables 1 of the positive power cables 3 and the power cables 1 of the negative power cables 4 are arranged in an annular array in the outer sheath 2, and the positive power cables 3 and the negative power cables 4 are arranged in a central symmetry manner.

The positive power cable 3 and the negative power cable 4 each include at least one power cable 1, and when a large current needs to flow, a large power conductor is required to bear a load, so that a plurality of power cables 1 need to be provided, and the plurality of power cables 1 are divided into the positive power cable 3 and the negative power cable 4. The plurality of power cables 3 are arranged in an annular array, so that the outer sheath 2 is round and neat. The positive power cable 3 and the negative power cable 4 are arranged on two sides, so that interference is avoided, and convenience is brought to manufacturing and power supply connection.

Further, the anode auxiliary power cable 5, the cathode auxiliary power cable 6, the anode auxiliary cooling pipe 7 and the cathode auxiliary cooling pipe 8 are all positioned in the center in the outer sheath 2; the positive power cable 3 and the negative power cable 4 are distributed on the outer ring in the outer sheath 2.

A plurality of power cables 1 of the anode power cable 3 and the cathode power cable 4 are arranged and distributed on the outer ring in the outer sheath 2; the auxiliary power cable and the auxiliary cooling pipe are respectively provided with a positive pole and a negative pole which are distributed on the inner ring of the outer sheath 2; the inner space of the outer sheath 2 is utilized to the maximum extent, so that the outer diameter of the liquid cooling cable is smaller, the weight is lighter, and the application is more convenient.

In the embodiment, the positive power cable 3 and the negative power cable 4 are respectively provided with four power cables 1, the eight power cables 1 are uniformly distributed around the inner side wall of the outer sheath 2, and the auxiliary power cables and the auxiliary cooling pipe are uniformly distributed in the center of the outer sheath 2.

Further, the positive auxiliary power cable 5, the negative auxiliary power cable 6, the positive auxiliary cooling pipe 7 and the negative auxiliary cooling pipe 8 are rectangular arrays, and the positive auxiliary power cable 5 and the negative auxiliary power cable 6 are arranged diagonally.

The auxiliary power cable and the auxiliary cooling pipe are rectangular arrays, the positive auxiliary power cable 5 is respectively in adjacent contact with the positive auxiliary cooling pipe 7 and the negative auxiliary cooling pipe 8, and the negative auxiliary power cable 6 is also respectively in adjacent contact with the two auxiliary cooling pipes, so that the cooling effect is improved.

Further, the outer diameters of the positive auxiliary power cable 5, the negative auxiliary power cable 6, the positive auxiliary cooling pipe 7 and the negative auxiliary cooling pipe 8 are all equal.

The auxiliary power cable and the auxiliary cooling pipe are arranged to be equal in outer diameter and adjacent and tangent to each other, close fitting is guaranteed, and cooling effect is improved.

Further, the cooling pipe 13, the positive auxiliary cooling pipe 7 and the negative auxiliary cooling pipe 8 of the power cable 1 are all insulating heat-conducting members, and cooling media are filled in the cooling pipe 13, the positive auxiliary cooling pipe 7 and the negative auxiliary cooling pipe 8, and the cooling media include water and/or ethylene glycol.

The cooling pipe 13 and the auxiliary cooling pipe can be made of insulating materials with hydrolysis resistance and high heat conduction, have certain hardness and high mechanical strength, and ensure that the power sub-conductor 12 can be tightly attached to the periphery of the cooling pipe 13 without collapsing the cooling pipe 13 and the auxiliary power cable is tightly attached to the auxiliary cooling pipe without collapsing the auxiliary cooling pipe. The cooling medium exchanges heat with the power conductor through the pipe wall, takes away most heat and has a cooling effect.

Further, the power supply device also comprises a ground wire, a signal wire, an anode auxiliary power supply wire and a cathode auxiliary power supply wire which are scattered and wrapped in the outer sheath 2.

Auxiliary cables 9 with small diameters such as a ground wire, a signal wire, an anode auxiliary power wire, a cathode auxiliary power wire and the like are scattered in gaps among the power cables, the auxiliary power cables and the auxiliary cooling pipes in the outer sheath 2, so that a supporting effect is achieved, and the outer sheath 2 is more round.

In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.