A cooling cable

Abstract

The present invention discloses a cooling cable, comprising at least one first wire core, a first cooling layer wrapping the first wire core, and a rigid sheath sleeved on the periphery of the first cooling layer, the first cooling layer comprising a first cooling medium and a first pressure member, the first cooling medium is made of a plastic crystal, the first pressure member is made of a heat-shrinkable and cold-expandable material, the cooling cable is at room temperature, the heat-shrinkable and cold-expandable material is in an expanded state, and applies pressure to the plastic crystal to keep the molecules of the plastic crystal in an ordered state; when the temperature of the first wire core rises, the heat-shrinkable and cold-expandable material is in a contracted state, and the pressure applied by the heat-shrinkable and cold-expandable material on the plastic crystal is reduced, so that the plastic crystal transitions from an ordered state to a disordered state and absorbs heat, thereby reducing the temperature of the first wire core. According to the cooling cable disclosed in the present invention, the temperature of the first wire core is reduced, and the current-carrying capacity of the first wire core is improved; compared with liquid-cooled cables with circulating coolant, the structure is simple and easy to produce.

Description

Technical Field

[0001] The present invention relates to the field of cable technology, and more particularly to a cooling cable. Background Art

[0002] With the rapid development of the new energy vehicle industry, the cruising range of electric vehicles continues to increase, and the battery capacity is getting larger and larger. It is necessary to improve the current-carrying capacity of the high-voltage cables connecting the energy storage batteries and the vehicle motors of new energy vehicles. The common method to improve the current-carrying capacity of high-voltage cables is to increase the wire diameter, but increasing the wire diameter will cause the size and weight of the high-voltage cables to increase significantly, squeezing the wiring space in the vehicle body and causing the weight of the entire vehicle to increase. Simply increasing the wire diameter of the high-voltage cable is no longer feasible.

[0003] At present, liquid cooling technology is usually used to dissipate heat from high-voltage cables. The high-voltage cables are provided with liquid cooling pipes connected to the cold source, so that the cooling medium can circulate in the pipeline formed by the cold source and the liquid cooling pipes, and can take away the heat generated by the high-voltage wire core.

[0004] However, the liquid-cooled cable requires a circulating pump to allow the coolant to circulate in the liquid-cooled pipe of the liquid-cooled cable, and its structure is complex, which is not conducive to production and subsequent maintenance.

[0005] Therefore, those skilled in the art are in urgent need of a cooling cable that can reduce the temperature of the conductor in the charging cable core and has a simple structure and is easy to produce. Summary of the invention

[0006] An object of the present invention is to provide a new technical solution for cooling cables.

[0007] According to a first aspect of the present invention, a cooling cable is provided, comprising at least one first core, a first cooling layer wrapping the first core, and a rigid sheath sleeved on the periphery of the first cooling layer, the first cooling layer comprising a first cooling medium and a first pressure member, the first cooling medium is made of a plastic crystal, the first pressure member is made of a heat-shrinkable and cold-expandable material, when the cooling cable is at room temperature, the heat-shrinkable and cold-expandable material is in an expanded state, and pressure is applied to the plastic crystal to keep the molecules of the plastic crystal in an ordered state; when the temperature of the first core rises, the heat-shrinkable and cold-expandable material is in a contracted state, and the pressure applied by the heat-shrinkable and cold-expandable material on the plastic crystal is reduced, so that the plastic crystal transitions from an ordered state to a disordered state and absorbs heat, thereby reducing the temperature of the first core.

[0008] Optionally, the material constituting the first cooling layer is an insulating material; or, the material constituting the first cooling layer is a conductive material, and a first insulating layer is sheathed around the outer periphery of the first wire core.

[0009] Optionally, a second annular wire core is further arranged between the first cooling layer and the rigid sheath.

[0010] Optionally, the material constituting the first cooling layer is an insulating material; or, the material constituting the first cooling layer is a conductive material, a first insulating layer is sheathed around the first core, and a second insulating layer is arranged between the first cooling layer and the second core.

[0011] Optionally, the rigid sheath is made of conductive material, and a third insulating layer is provided between the second wire core and the rigid sheath.

[0012] Optionally, the second core includes a plurality of conductors and insulators that are spaced apart and interconnected.

[0013] Optionally, an annular second cooling layer is further arranged between the second wire core and the rigid sheath; the second cooling layer includes a second cooling medium and a second pressure member, the second cooling medium is made of plastic crystal, and the second pressure member is made of heat-shrinkable and cold-expandable material.

[0014] Optionally, the material constituting the second cooling layer is an insulating material; or, the materials constituting the second cooling layer and the rigid jacket are both conductive materials, and a fourth insulating layer is arranged between the second cooling layer and the rigid jacket.

[0015] Optionally, the cross-sectional area occupied by the first cooling layer differs from the cross-sectional area occupied by the second cooling layer by no more than 20%.

[0016] Optionally, the heat shrinkable and cold expandable material and the plastic crystal are in granular form and are uniformly mixed and filled in the first cooling layer or the second cooling layer.

[0017] Optionally, the heat shrinkable and cold expansion material and the plastic crystal are in sheet form, and are filled in the first cooling layer or the second cooling layer after being sleeved, and the plastic crystal is arranged close to the first wire core or the second wire core.

[0018] Optionally, the heat shrinkable and cold expansion material and the plastic crystal are in sheet form, the plastic crystal is in two layers, the heat shrinkable and cold expansion material is arranged between the two layers of the plastic crystal and then filled in the first cooling layer or the second cooling layer.

[0019] Optionally, the bending radius of the cooling cable is greater than or equal to 3 times the diameter of the cooling cable.

[0020] Optionally, a water-absorbing layer is also provided on the outer periphery of the rigid sheath.

[0021] A cooling cable according to the present disclosure has the following beneficial effects:

[0022] When the cooling cable of the present application is in a non-working state or at room temperature, the first pressure component made of the heat-shrinkable and cold-expandable material is in a state of applying pressure to the first cooling medium made of the plastic crystal, so that the lattice arrangement of the plastic crystal remains in an ordered state. After the first core is energized, the heat-shrinkable and cold-expandable material of the first pressure component shrinks due to the temperature rise of the first core, the pressure on the first cooling medium is reduced, and the lattice arrangement of the plastic crystal constituting the first cooling medium transitions from an ordered state to a disordered state and generates a low temperature to absorb the heat generated by the first core, thereby reducing the temperature of the first core, improving the current-carrying capacity of the first core, and reducing the wire diameter of the first core.

[0023] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0025] Figure 1 A schematic structural diagram of a cooling cable according to a first embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of a cooling cable according to a second embodiment of the present invention;

[0027] Figure 3 A schematic structural diagram of a cooling cable according to a third embodiment of the present invention;

[0028] Figure 4 A schematic structural diagram of a cooling cable according to a fourth embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of a cooling cable according to a fifth embodiment of the present invention;

[0030] Figure 6 A schematic structural diagram of a cooling cable according to a sixth embodiment of the present invention;

[0031] Figure 7 is another structural schematic diagram of the first cooling layer in the present invention;

[0032] Figure 8 is another structural schematic diagram of the first cooling layer in the present invention;

[0033] Fig. 9 This is a schematic structural diagram of a cooling cable according to a seventh embodiment of the present invention.

[0034] The following are marked in the figure:

[0035] 101-first wire core; 102-first cooling layer; 103-rigid sheath; 104-first cooling medium; 105-first pressure member; 106-first insulating layer; 107-second wire core; 108-second insulating layer; 109-third insulating layer; 110-conductor; 111-insulator; 112-second cooling layer; 113-fourth insulating layer; 114-water absorbing layer; 115-second cooling medium; 116-second pressure member. DETAILED DESCRIPTION

[0036] 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 embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0037] 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.

[0038] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0040] According to a cooling cable disclosed in the present invention, Figure 1 As shown, it includes at least one first wire core 101, a first cooling layer 102 wrapping the first wire core 101, and a rigid sheath 103 sleeved on the outer periphery of the first cooling layer 102;

[0041] The first cooling layer 102 includes a first cooling medium 104 and a first pressure member 105. The first cooling medium 104 is made of plastic crystals, and the first pressure member 105 is made of heat-shrinkable and cold-expandable material. When the cooling cable is at room temperature, the heat-shrinkable and cold-expandable material is in an expanded state and applies pressure to the plastic crystals to keep the molecules of the plastic crystals in an ordered state. When the temperature of the first core 101 rises, the heat-shrinkable and cold-expandable material is in a contracted state, and the pressure applied by the heat-shrinkable and cold-expandable material on the plastic crystals is reduced, so that the plastic crystals transition from an ordered state to a disordered state and absorb heat, thereby reducing the temperature of the first core 101.

[0042] Under normal conditions, the molecular structure of plastic crystals is highly disordered, i.e., the lattice arrangement is irregular, but relatively small pressure can induce changes in the lattice structure, thereby converting between crystals and amorphous crystals. Therefore, plastic crystals are highly compressible and reversible, i.e., they can be restored to their original state after compression. After the plastic crystal is pressurized, the molecules in the plastic crystal are transformed from a disordered state to an ordered arrangement. After the pressure on the plastic crystal is reduced, the lattice arrangement of the plastic crystal is restored from an ordered state to a disordered state, and the temperature of the plastic crystal is greatly reduced at this time, so as to cool the first core 101 and prevent the temperature from rising.

[0043] The heat shrinkable and cold expansion material can be antimony, bismuth, gallium, nickel sulfide, vanadate, silicon dioxide aerogel heat shrinkable and cold expansion powder, gallium indium alloy and cross-linked copolymer of N-isopropyl acrylamide and N-tert-butyl acrylamide, etc., which is in an expanded state under normal temperature conditions or low temperature conditions, but in a contracted state under high temperature conditions; when the cooling cable of the present application is in a non-working state or under normal temperature conditions, the first pressure member 105 made of the heat shrinkable and cold expansion material is always in a state of applying pressure to the first cooling medium 104 made of the plastic crystal, so that the plastic The lattice arrangement of the plastic crystals remains in an ordered state. After the first core 101 is energized, the temperature rise of the first core 101 causes the heat-shrinkable and cold-expandable materials of the first pressure member 105 to shrink, and the pressure on the first cooling medium 104 is reduced. The lattice arrangement of the plastic crystals constituting the first cooling medium 104 transitions from an ordered state to a disordered state and generates a low temperature to absorb the heat generated by the first core 101, so as to cool the first core 101 and prevent the temperature from rising, improve the current-carrying capacity of the first core 101, and reduce the wire diameter of the first core 101. In the process of the cooling cable of the present application returning from a working state to a non-working state, the temperature of the first core 101 decreases, causing the heat-shrinkable and cold-expandable materials of the first pressure member 105 to expand, squeezing the plastic crystals constituting the first pressure member 105, so that the lattice arrangement of the plastic crystals of the first pressure member 105 transitions from a disordered state again and remains in an ordered state and releases heat. At this time, the heat generated by the plastic crystals will diffuse to the surrounding environment and gradually restore the cooling cable to normal temperature.

[0044] Compared with liquid-cooled cables that circulate cooling liquid, the cooling cable of the present application has the advantages of simple structure and easy production.

[0045] The manufacturing method of the cooling cable is as follows: the first cooling layer 102 is filled in the cooling cable under high temperature state. When the cooling cable returns to normal temperature, the first pressure member 105 made of heat shrinkable and cold expanding material expands, thereby generating pressure on the first cooling medium 104 made of plastic crystals, so that the lattice arrangement of the plastic crystals of the first cooling medium 104 transitions from a disordered state to an ordered state, releasing heat and dissipating it to the surrounding environment, thereby reaching a normal temperature state.

[0046] According to an embodiment of the cooling cable of the present disclosure, Figure 2 As shown, the material constituting the first cooling layer 102 is an insulating material; or, the material constituting the first cooling layer 102 is a conductive material, and a first insulating layer 106 is sheathed around the first core 101 .

[0047] The material constituting the first cooling layer 102 is an insulating material, which means that the first cooling medium 104 and the first pressure member 105 included in the first cooling layer 102 are both composed of insulating materials. The first cooling medium 104 can be neopentyl glycol, which is a plastic crystal. The first pressure member 105 can be made of silica aerogel thermal shrinkage and cold expansion and contraction powder. In the space with fixed radial dimensions between the rigid sheath 103 and the first core 101, the volume of the first pressure member 105 expands or contracts, and the pressure of the first pressure member 105 on the first cooling medium 104 is changed, so as to control the lattice arrangement of the plastic crystals constituting the first cooling medium 104, so that when the first core 101 generates heat, the plastic crystals in the first pressure member 105 cool down and absorb the heat generated by the first core 101.

[0048] The material constituting the first cooling layer 102 is a conductive material, which means that at least one of the first cooling medium 104 and the first pressure member 105 included in the first cooling layer 102 is composed of a conductive material. In order to prevent the conductive material from contacting the first wire core 101, a first insulating layer 106 is arranged between the first wire core 101 and the first cooling layer 102. The first insulating layer 106 is a rigid insulating layer to prevent the first cooling layer 102 from contacting the first wire core 101. The first cooling medium 104 can be neopentyl glycol, which is a plastic crystal. The first pressure member 105 can be made of antimony, bismuth, gallium, nickel sulfide, or vanadate. The rigid sheath 103 and the first insulating layer 106 are both difficult to deform, so a space with a fixed radial dimension can be formed between the rigid sheath 103 and the first insulating layer 106. In the space with a fixed radial dimension, the volume of the first pressure member 105 expands or contracts, and the pressure of the first pressure member 105 on the first cooling medium 104 is changed, so as to control the lattice arrangement of the plastic crystals constituting the first cooling medium 104, so that when the first core 101 generates heat, the plastic crystals cool down and absorb the heat generated by the first core 101.

[0049] According to an embodiment of the cooling cable of the present disclosure, Figure 3 As shown, a second annular core 107 is further arranged between the first cooling layer 102 and the rigid sheath 103 .

[0050] When the material constituting the first cooling layer 102 is an insulating material, the first cooling layer 102 can cool the first core 101 and the second core 107 at the same time, thereby improving the current carrying capacity of the first core 101 and the second core 107; by setting the first core 102 and the second core 107, the positive pole and the negative pole of the power supply in the charging circuit can be connected respectively.

[0051] Specifically, Figure 4 As shown, the material constituting the first cooling layer 102 is an insulating material; or, the material constituting the first cooling layer 102 is a conductive material, a first insulating layer 106 is sheathed around the first core 101, and a second insulating layer 108 is arranged between the first cooling layer 102 and the second core 107.

[0052] The material constituting the first cooling layer 102 is an insulating material, which means that the first cooling medium 104 and the first pressure member 105 included in the first cooling layer 102 are both composed of insulating materials. The first cooling medium 104 can be neopentyl glycol, which is a plastic crystal. The first pressure member 105 can be made of silica aerogel thermal shrinkage and cold expansion and contraction powder. In the space with fixed radial dimensions between the second core 107 and the first core 101, the volume expansion or contraction of the first pressure member 105 changes the pressure of the first pressure member 105 on the first cooling medium 104, so as to control the lattice arrangement of the plastic crystals constituting the first cooling medium 104, so that when the first core 101 and the second core 107 generate heat, the plastic crystals cool down and absorb the heat generated by the first core 101.

[0053] The material constituting the first cooling layer 102 is a conductive material, which means that at least one of the first cooling medium 104 and the first pressure member 105 included in the first cooling layer 102 is composed of a conductive material. In order to prevent the conductive material from contacting the first core 101 and the second core 107, a first insulating layer 106 is arranged between the first core 101 and the first cooling layer 102, and the first insulating layer 106 is a rigid insulating layer. A second insulating layer 108 is arranged between the first cooling layer 102 and the second core 107, and the second insulating layer 108 is a rigid insulating layer to prevent the first cooling layer 102 from contacting the first core 101 and the second core 107. The first cooling medium 104 can be neopentyl glycol, which is a plastic crystal. The first pressure member 105 can be made of antimony, bismuth, gallium, nickel sulfide, or vanadate. The first insulating layer 106 and the second insulating layer 108 are both difficult to deform, so a space with fixed radial dimensions is formed between the rigid sheath 103 and the first insulating layer 106. In the space with fixed radial dimensions, the volume of the first pressure member 105 expands or contracts, thereby changing the pressure of the first pressure member 105 on the first cooling medium 104, so as to control the lattice arrangement of the plastic crystals constituting the first cooling medium 104, so that when the first core 101 and the second core 107 generate heat, the plastic crystals cool down and absorb the heat generated by the first core 101 and the second core 107.

[0054] Specifically, Figure 4 and Figure 5 As shown, the rigid sheath 103 is made of conductive material, and a third insulating layer 109 is disposed between the second wire core 107 and the rigid sheath 103 .

[0055] When the rigid sheath 103 is made of conductive material, the rigid sheath 103 can be used as a shielding layer to shield the electromagnetic interference generated by the first core 101 and the second core 107; to avoid electrical contact between the second core 107 and the rigid conductor 110, a third insulating layer 109 is arranged between the second core 107 and the rigid sheath 103, and the third insulating layer 109 is a rigid insulating layer, thereby forming a space with fixed radial dimensions between the second core 107 and the third insulating layer 109.

[0056] Specifically, Figure 5 As shown, the second core 107 includes a plurality of conductors 110 and insulators 111 that are spaced and connected to each other. Adjacent conductors 110 can be spaced and insulated from each other by the insulators 111, so that the second core 107 can connect multiple conductive loops. When there are two conductors 110 in the second core 107, they can be connected to the positive pole and the negative pole of the power supply respectively, and the first core 101 located in its inner cavity can also be used as a PE line.

[0057] Specifically, an annular second cooling layer 112 is further provided between the second core 107 and the rigid sheath 103. The second cooling layer 112 includes a second cooling medium 115 and a second pressure member 116. The second cooling medium 115 is made of plastic crystal, and the second pressure member 116 is made of heat-shrinkable and cold-expandable material. The second cooling layer 112 can quickly absorb the heat generated by the second core 107, further improving the current carrying capacity of the second core 107.

[0058] The manufacturing method of the cooling cable is as follows: the second cooling structure layer 112 is filled in the cooling cable under high temperature. When the cooling cable returns to normal temperature, the second pressure member 116 made of heat shrinkable and cold expanding material expands, thereby generating pressure on the second cooling medium 115 made of plastic crystals, so that the lattice arrangement of the plastic crystals in the second cooling medium 115 transitions from a disordered state to an ordered state, releasing heat and dissipating it to the surrounding environment, thereby reaching a normal temperature state.

[0059] The second cooling layer 112 includes a second cooling medium 115 and a second pressure member 116. The second cooling medium 115 is made of plastic crystals, and the second pressure member 116 is made of heat-shrinkable and cold-expandable material. When the cooling cable is at room temperature, the heat-shrinkable and cold-expandable material is in an expanded state and applies pressure to the plastic crystals to keep the molecules of the plastic crystals in an ordered state. When the temperature of the second core 107 rises, the heat-shrinkable and cold-expandable material constituting the second pressure member 116 is in a contracted state, and the pressure applied by the second pressure member 116 on the plastic crystals constituting the second cooling medium 115 is reduced, so that the plastic crystals transition from an ordered state to a disordered state and absorb heat, thereby reducing the temperature of the second core 107.

[0060] More specifically, if Figure 6 As shown, the material constituting the second cooling layer 112 is an insulating material; or, the materials constituting the second cooling layer 112 and the rigid sheath 103 are both conductive materials, and a fourth insulating layer 113 is provided between the second cooling layer 112 and the rigid sheath 103 .

[0061] The material constituting the second cooling layer 112 is an insulating material, which means that the second cooling medium 115 and the second pressure member 116 included in the second cooling layer 112 are both composed of insulating materials. The second cooling medium 115 can be neopentyl glycol, which is a plastic crystal, and the second pressure member 116 can be made of silica aerogel thermal shrinkage and cold expansion and contraction powder. In the space with fixed radial dimensions between the rigid sheath 103 and the second core 107, the volume of the second pressure member 115 expands or contracts, and the pressure of the second pressure member 115 on the second cooling medium 116 is changed, so as to control the lattice arrangement of the plastic crystals constituting the second cooling medium 115, so that when the second core 107 generates heat, the plastic crystals cool down and absorb the heat generated by the second core 107; the material of the second cooling layer 112 is an insulating material, which saves the use of an insulating layer.

[0062] The second cooling layer 112 is made of conductive material, which means that at least one of the second cooling medium 115 and the second pressure member 116 included in the second cooling layer 112 is made of conductive material. In order to prevent the conductive material from contacting the second core 107, a third insulating layer 109 is arranged between the second core 107 and the second cooling layer 112, and a fourth insulating layer 113 is arranged between the second cooling layer 112 and the rigid sheath 103. The fourth insulating layer 113 is a rigid insulating layer to prevent the second cooling layer 112 from contacting the second core 107 and the rigid sheath 103. The second cooling medium 115 can be neopentyl glycol, which is a plastic crystal. The second pressure member 116 can be made of antimony, bismuth, gallium, nickel sulfide, or vanadate. The fourth insulating layer 113 and the third insulating layer 109 are both difficult to deform, so a space with fixed radial dimensions is formed between the fourth insulating layer 113 and the third insulating layer 109. In the space with fixed radial dimensions, the volume expansion or contraction of the second pressure member 116 changes the pressure of the second pressure member 116 on the second cooling medium 115, thereby controlling the lattice arrangement of the plastic crystals constituting the second cooling medium 115. When the second core 107 generates heat, the plastic crystals cool down and absorb the heat generated by the second core 107, thereby improving the current carrying capacity of the second core 107.

[0063] Specifically, the cross-sectional area occupied by the first cooling layer 102 differs from the cross-sectional area occupied by the second cooling layer 112 by no more than 20%. The heat generated during the operation of the first core 101 and the second core 107 can be absorbed at the same time, thereby improving the current carrying capacity of the first core 101 and the second core 107; if the cross-sectional area occupied by the first cooling layer 102 differs from the cross-sectional area occupied by the second cooling layer 112 by more than 20%, one of the first cooling layer 102 and the second cooling layer 112 will be too small and cannot absorb the heat generated by the first core 101 and the second core 107 in time, while the other will be too large, which will also waste the heat absorption capacity of the first cooling medium 104 or the second cooling medium 115 composed of plastic crystals in the other of the first cooling layer 102 and the second cooling layer 112, and increase the wire diameter of the cooling cable.

[0064] According to an embodiment of the cooling cable disclosed herein, Figures 1 to 6 As shown, the heat shrinkable and cold expandable material and the plastic crystal are in granular form and are uniformly mixed and filled in the first cooling layer 102 or the second cooling layer 112 .

[0065] The first cooling layer 102 is composed of a uniform mixture of heat-shrinkable and cold-expandable material particles and plastic crystal particles, and is arranged in a space with fixed radial dimensions between the first core 101 and the rigid sheath 103, or between the first core 101 and the second core 107. At room temperature or when the first core 101 is not working, the plastic crystal particles in the first cooling medium 104 are squeezed by the heat-shrinkable and cold-expandable material in the first pressure member 105 to keep the crystal arrangement in an ordered state. The first pressure member 105 made of the heat-shrinkable and cold-expandable material will shrink when subjected to high temperatures of the first core 101 and the second core 107, reducing the pressure on the plastic crystals of the first cooling medium 104, and the lattice arrangement of the plastic crystals will recover from an ordered state to a disordered state. In this process, the first cooling medium 104 will generate low temperature to absorb the heat generated by the first core 101 and the second core 107 during charging.

[0066] In addition, the second cooling layer 112 is composed of a uniformly mixed heat-shrinkable and cold-expandable material particles and plastic crystal particles, and is arranged in a space with fixed radial dimensions between the second core 107 and the rigid sheath 103. At room temperature or when the first core 101 and the second core 107 are not working, the plastic crystal particles in the second cooling medium 115 are squeezed by the heat-shrinkable and cold-expandable material in the second pressure member 116 to keep the crystal arrangement in an ordered state. The second pressure member 116 made of the heat-shrinkable and cold-expandable material will shrink when subjected to the high temperature of the second core 107, reducing the pressure on the plastic crystals of the second cooling medium 115, and the lattice arrangement of the plastic crystals will recover from an ordered state to a disordered state. In this process, the second cooling medium 115 will generate low temperature to absorb the heat generated by the second core 107 during the charging process.

[0067] According to an embodiment of the cooling cable disclosed herein, Figure 7 As shown, the heat shrinkable and cold expansion material and the plastic crystal are in sheet form, and are filled in the first cooling layer 102 or the second cooling layer 112 after being sleeved, and the plastic crystal is arranged close to the first wire core 101 or the second wire core 107.

[0068] During specific implementation, the first cooling medium 104 in the first cooling layer 102 is close to the first wire core 101, and the plastic crystals in the first cooling medium 104 in the first cooling layer 102 have a lower temperature as the pressure of the first pressure member 105 in the first cooling layer 102 decreases, thereby absorbing the heat generated by the first wire core 101 and improving the current carrying capacity of the first wire core 101; the second cooling medium 115 in the second cooling layer 112 is close to the second wire core 107, and the plastic crystals in the second cooling medium 115 in the second cooling layer 112 have a lower temperature as the pressure of the second pressure member 116 in the second cooling layer 112 decreases, thereby absorbing the heat generated by the second wire core 107 and improving the current carrying capacity of the second wire core 107.

[0069] In a specific implementation, the second cooling layer 112 and the first cooling layer 102 may have the same structure. The structural diagram of the second cooling layer 112 may refer to the following: Figure 7 A schematic structural diagram of the first cooling layer 102 is shown.

[0070] According to an embodiment of the cooling cable disclosed herein, Figure 8 As shown, the heat shrinkable and cold expansion material and the plastic crystal are in sheet form, the plastic crystal is in two layers, the heat shrinkable and cold expansion material is arranged between the two layers of the plastic crystal and then filled in the first cooling layer 102 or the second cooling layer 112 .

[0071] In a specific implementation, in the first cooling layer 102, there are two layers of plastic crystals, the two layers of plastic crystals are respectively close to the first core 101 and the second core 107, and the two layers of plastic crystals are respectively constructed into two layers of first cooling medium 104. The lattice arrangement in each first cooling medium 104 is changed by reducing the pressure of the first pressure member 105 made of the heat shrinking and cold expanding material between the two. The temperature of the plastic crystal is reduced, and the heat generated by the first core 101 and the second core 107 is absorbed, thereby improving the current carrying capacity of the first core 101 and the second core 107. ; In the second cooling layer 112, there are two layers of plastic crystals, which are respectively close to the second core 107 and the rigid sheath 103, and the two layers are respectively constructed into two layers of second cooling medium 115. The lattice arrangement of the plastic crystals in each second cooling medium 115 changes due to the pressure reduction of the second pressure member 116 made of thermal shrinkage and thermal expansion material between the two. The temperature of the plastic crystals decreases, absorbing the heat generated by the second core 107 and reducing the heat of the rigid sheath 103 in the use environment, thereby improving the current carrying capacity of the second core 107.

[0072] In a specific implementation, the second cooling layer 112 and the first cooling layer 102 may have the same structure. The structural diagram of the second cooling layer 112 may refer to the following: Figure 8 A schematic structural diagram of the first cooling layer 102 is shown.

[0073] According to one embodiment of the cooling cable disclosed herein, the bending radius of the cooling cable is greater than or equal to 3 times the diameter of the cooling cable. In practical applications, the bending radius of the cooling cable is greater than or equal to 3 times the diameter of the cooling cable, which can meet the wiring requirements of the high-voltage cable between the energy storage battery and the motor; however, it is preferred that the bending radius of the cable is greater than or equal to 5 times the diameter of the cable, which meets the requirements of international practice. The bending radius of the cable is greater than or equal to 3 times the diameter of the cable, which can avoid the small bending radius from squeezing the first cooling layer and / or the second cooling layer, thereby causing the state of the plastic crystal to change unexpectedly.

[0074] According to an embodiment of the cooling cable disclosed herein, Figure 6 As shown, a water absorbing layer 114 is also provided on the outer periphery of the rigid sheath 103. When the temperature of the plastic crystal is rapidly reduced, water vapor will condense on the outer periphery of the rigid sheath 103. The water absorbing layer 114 can prevent water droplets formed by condensation of water vapor on the outer periphery of the rigid sheath 103 from falling down, causing trouble to the user, or damaging the wiring environment in the vehicle.

[0075] The contour lines of each part in the cross section of the cooling cable of the present invention can be circular or can be as follows: Fig. 9 Square, polygon, etc. as shown.

[0076] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A cooling cable, comprising at least one first wire core, a first cooling layer wrapping the first wire core, and a rigid sheath sleeved on the outer periphery of the first cooling layer, characterized in that: The first cooling layer includes a first cooling medium and a first pressure member, the first cooling medium is made of plastic crystal, the first pressure member is made of heat shrinkable and cold expansion material, when the cooling cable is at room temperature, the heat shrinkable and cold expansion material is in an expanded state, and applies pressure to the plastic crystal, so that the molecules of the plastic crystal remain in an ordered state; when the temperature of the first core increases, the heat shrinkable and cold expansion material is in a contracted state, and the pressure applied by the heat shrinkable and cold expansion material to the plastic crystal decreases, so that the plastic crystal transitions from an ordered state to a disordered state and absorbs heat, so that the temperature of the first core decreases; The material constituting the first cooling layer is an insulating material; or, When the material constituting the first cooling layer is a conductive material, a first insulating layer is sheathed around the outer periphery of the first core.

2. The cooling cable according to claim 1, characterized in that: The heat shrinkable and cold expansion material is antimony, bismuth, gallium, nickel sulfide, silicon dioxide aerogel heat shrinkable and cold expansion shrinkage powder or a gallium-indium alloy and a cross-linked copolymer of N-isopropylacrylamide and N-tert-butylacrylamide; The plastic crystal is neopentyl glycol.

3. The cooling cable according to claim 1, characterized in that: A second annular wire core is also arranged between the first cooling layer and the rigid sheath.

4. The cooling cable according to claim 3, characterized in that: The material constituting the first cooling layer is an insulating material; or, the material constituting the first cooling layer is a conductive material, a first insulating layer is sheathed around the first core, and a second insulating layer is arranged between the first cooling layer and the second core.

5. The cooling cable according to claim 3, characterized in that: The rigid sheath is made of conductive material, and a third insulating layer is arranged between the second wire core and the rigid sheath.

6. The cooling cable according to claim 3, characterized in that: The second core includes a plurality of conductors and insulators which are spaced apart and connected to each other.

7. The cooling cable according to claim 3, characterized in that: An annular second cooling layer is also arranged between the second wire core and the rigid sheath; the second cooling layer includes a second cooling medium and a second pressure member, the second cooling medium is made of plastic crystal, and the second pressure member is made of heat shrinkable and cold expanding material.

8. The cooling cable according to claim 7, characterized in that The material constituting the second cooling layer is an insulating material; or, the materials constituting the second cooling layer and the rigid sheath are both conductive materials, and a fourth insulating layer is arranged between the second cooling layer and the rigid sheath.

9. The cooling cable according to claim 7, characterized in that: The cross-sectional area occupied by the first cooling layer differs from the cross-sectional area occupied by the second cooling layer by no more than 20%.

10. The cooling cable according to any one of claims 1 to 9, characterized in that: The heat-shrinkable and cold-expandable material and the plastic crystal are in granular form and are uniformly mixed and filled in the first cooling layer or the second cooling layer.

11. The cooling cable according to any one of claims 1 to 9, characterized in that: The heat shrinkable and cold expansion material and the plastic crystal are in sheet form, and are filled in the first cooling layer or the second cooling layer after being sleeved, and the plastic crystal is arranged close to the first wire core or the second wire core.

12. The cooling cable according to any one of claims 1 to 9, characterized in that: The heat shrinkable and cold expansion material and the plastic crystal are in sheet form, the plastic crystal is in two layers, the heat shrinkable and cold expansion material is arranged between the two layers of the plastic crystal and then filled in the first cooling layer or the second cooling layer.

13. The cooling cable according to any one of claims 1 to 9, characterized in that: The bending radius of the cooling cable is greater than or equal to 3 times the diameter of the cooling cable.

14. The cooling cable according to any one of claims 1 to 9, characterized in that: A water absorbing layer is also sheathed on the outer periphery of the rigid sheath.

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