CN116959799B - Liquid cooling charging cable and charging device - Google Patents
Liquid cooling charging cable and charging device Download PDFInfo
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- CN116959799B CN116959799B CN202311144975.7A CN202311144975A CN116959799B CN 116959799 B CN116959799 B CN 116959799B CN 202311144975 A CN202311144975 A CN 202311144975A CN 116959799 B CN116959799 B CN 116959799B
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- 239000007788 liquid Substances 0.000 title claims abstract description 210
- 238000001816 cooling Methods 0.000 title claims abstract description 195
- 239000004020 conductor Substances 0.000 claims abstract description 140
- 239000000110 cooling liquid Substances 0.000 claims abstract description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 56
- 229910052802 copper Inorganic materials 0.000 claims description 56
- 239000010949 copper Substances 0.000 claims description 56
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 description 12
- 230000017525 heat dissipation Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 238000009954 braiding Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229920002397 thermoplastic olefin Polymers 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/18—Cables specially adapted for charging electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/12—Braided wires or the like
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to the technical field of cables, in particular to a liquid cooling charging cable and a charging device. The liquid cooling charging cable comprises a liquid cooling inlet pipe and at least two charging main lines, wherein the charging main lines comprise a liquid cooling outer pipe, a conductor and a liquid cooling inner pipe, the conductor is arranged in the liquid cooling outer pipe, the conductor is coated on the periphery of the liquid cooling inner pipe, the outer wall of the conductor and the inner wall of the liquid cooling outer pipe are arranged at intervals to form a first liquid flow channel for cooling liquid to flow, the inner cavity of the liquid cooling inner pipe forms a second liquid flow channel for cooling liquid to flow, and the liquid cooling inlet pipe is communicated with the liquid cooling outer pipe and the liquid cooling inner pipe to form a cooling loop; the charging device adopts the liquid cooling charging cable. The liquid cooling charging cable can cool the surface of the conductor, can cool the center of the conductor, has a better cooling effect, and can realize cooling more quickly; after the liquid cooling charging cable is adopted by the charging device, the charging efficiency can be improved, and the charging time of an automobile can be reduced.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a liquid cooling charging cable and a charging device.
Background
In recent years, with the rapid development of new energy technologies, electric vehicles enter home and business fields in large numbers, and users have increasingly high requirements on battery capacity, driving range and charging speed, so that high-power charging technologies are gradually developed. Although the charging technology is continuously innovated, at present, a household new energy passenger car needs at least 30 minutes from electricity deficiency to 80%. The reason is mainly that the problem of heating at the connection part of the conductor and the terminal is limited when the high-current long-time charging is performed, so that the charging pile is forced to perform current limiting treatment when the temperature of the cable rises, the charging efficiency is reduced, and the charging time of the automobile is prolonged. And the cable generates heat seriously, there is the hidden danger of catching fire. Therefore, there is an urgent need for a cable capable of satisfying high-current rapid charging to solve the drawbacks of the prior art.
Based on the existing defects, the Chinese patent application with the application publication number of CN114360804A discloses a liquid cooling cable and a charging device, wherein the liquid cooling cable comprises an outer sheath, a containing cavity is formed in the outer sheath, a liquid outlet pipe, a liquid inlet pipe and a bare conductor are coated in the outer sheath, and the liquid outlet pipe is of a hollow structure for cooling liquid to flow; the bare conductor is arranged in the liquid outlet pipe, and the outer wall of the bare conductor and the inner wall of the liquid outlet pipe are arranged at intervals to form a liquid flow channel for cooling liquid to flow; the liquid inlet pipe is communicated with the liquid outlet pipe to form a cooling loop. In the liquid cooling cable, the cooling liquid in the liquid outlet pipe is directly contacted with the outer surface of the bare conductor, so that the heat generated by the bare conductor can be absorbed in a large amount, and the cooling liquid is circulated, so that the heat generated by the bare conductor when the current is conducted can be taken away in a large efficiency, and the heat dissipation effect of the liquid cooling cable is improved. However, since the liquid cooling cable needs to carry a larger current, the cross-sectional area of the liquid cooling cable is larger than that of a common cable, the cooling liquid in the liquid cooling cable can only quickly absorb the heat at the outer surface of the conductor, but a large amount of heat is accumulated in the conductor, and the heat is difficult to quickly dissipate, so that the existing liquid cooling cable has poor heat dissipation effect.
Disclosure of Invention
In view of the above, the present invention aims to provide a liquid cooling charging cable, so as to solve the technical problem that the existing liquid cooling charging cable has poor heat dissipation effect; the invention also aims to provide a charging device for realizing quick charging of the new energy automobile.
In order to solve the problems, the liquid cooling charging cable provided by the invention adopts the following technical scheme:
the liquid cooling charging cable comprises at least one liquid cooling inlet pipe and at least two charging main lines, wherein the charging main lines comprise a liquid cooling outer pipe, a conductor and a liquid cooling inner pipe, the conductor is arranged inside the liquid cooling outer pipe, the conductor is coated on the periphery of the liquid cooling inner pipe, the outer wall of the conductor and the inner wall of the liquid cooling outer pipe are arranged at intervals to form a first liquid flow channel for cooling liquid to flow, the inner cavity of the liquid cooling inner pipe forms a second liquid flow channel for cooling liquid to flow, and the liquid cooling inlet pipe is communicated with the liquid cooling outer pipe and the liquid cooling inner pipe to form a cooling loop.
The liquid cooling charging cable has the beneficial effects that: in the using process of the liquid cooling charging cable, heat generated by energizing the conductor can be fully absorbed by cooling liquid flowing between the liquid cooling outer tube and the conductor, and can be absorbed by cooling liquid flowing in the liquid cooling inner tube. Compared with the liquid cooling cable in the prior art, the liquid cooling charging cable can cool the surface of the conductor and the center of the conductor at the same time under the same current-carrying capacity, namely, the same conductor is cooled twice, the cooling effect is better, and the cooling can be realized more quickly; in addition, the heat generated by the conductor taken away by adopting the double-layer cooling mode is much higher than that taken away by the single-layer cooling mode, and the conductor with smaller sectional area can be adopted by the conductor with the double-layer cooling mode under the condition of the same current carrying.
Further, a plurality of liquid outlet holes which are uniformly and densely distributed are formed in the pipe wall of the liquid cooling inner pipe.
The beneficial effects are that: the cooling liquid flowing in the liquid cooling inner tube can be in direct contact with the inner surface of the conductor through the liquid outlet hole, so that heat in the center of the conductor is quickly absorbed.
Further, the liquid cooling inlet pipe is arranged between any two liquid cooling outer pipes and is in butt joint with the two liquid cooling outer pipes.
The beneficial effects are that: the liquid cooling inlet pipe also flows with cooling liquid, and after the liquid cooling inlet pipe is abutted with the liquid cooling outer pipe, the heat dissipation of the liquid cooling outer pipe can be quickened.
Further, the conductors comprise stranded copper conductors and braided copper conductors, wherein the stranded copper conductors are coated on the periphery of the liquid cooling inner tube, and the braided copper conductors are coated on the periphery of the stranded copper conductors.
The beneficial effects are that: the braided copper conductor is arranged on the periphery of the stranded copper conductor, so that the oxidation speed of the stranded copper conductor can be slowed down, the stranded copper conductor can be tightly bound, the stranded copper conductor is not easy to loosen, and the flow rate of cooling liquid and the heat transfer efficiency of the conductor can be optimized by adjusting the braiding density of the braided copper conductor.
Further, a plurality of protrusions are arranged on the inner wall of the liquid cooling outer tube around the circumference direction of the conductor, and the protrusions are abutted against the outer circumference of the conductor or are spaced from the outer circumference of the conductor by a set interval.
The beneficial effects are that: the bump can avoid the inner wall laminating of conductor and liquid cooling outer tube, guarantees to have the liquid flow channel that supplies the coolant liquid to get into all the time between liquid cooling outer tube and the conductor.
Further, a plurality of mounting grooves are formed in the inner pipe wall of the liquid cooling outer pipe around the circumference of the conductor, buffer springs are connected in each mounting groove, the end portions of the buffer springs are connected with buffer plates, and the buffer plates are in sliding sealing fit with the liquid cooling outer pipe.
The beneficial effects are that: when the temperature in the liquid cooling charging cable rises to increase the pressure in the liquid cooling charging cable, the buffer plate can be pushed to move in the mounting groove against the elastic force of the buffer spring, and the increased pressure is absorbed through the buffer spring, so that the inside of the liquid cooling charging cable is kept in a relatively stable environment.
The charging device provided by the invention adopts the following technical scheme:
the charging device comprises a liquid cooling charging cable, the liquid cooling charging cable comprises at least one liquid cooling inlet pipe and at least two charging main lines, each charging main line comprises a liquid cooling outer pipe, a conductor and a liquid cooling inner pipe, the conductor is arranged inside the liquid cooling outer pipe, the conductor is coated on the periphery of the liquid cooling inner pipe, the outer wall of the conductor and the inner wall of the liquid cooling outer pipe are arranged at intervals to form a first liquid flow channel for cooling liquid to flow, the inner cavity of the liquid cooling inner pipe forms a second liquid flow channel for cooling liquid to flow, and the liquid cooling inlet pipe is communicated with the liquid cooling outer pipe and the liquid cooling inner pipe to form a cooling loop.
The charging device has the beneficial effects that: the charging device adopts the liquid cooling charging cable which can cool the surface of the conductor and cool the center of the conductor simultaneously, and cools the same conductor twice, thereby improving the cooling effect and realizing the cooling more quickly, improving the charging efficiency and reducing the charging time of the automobile under the condition of ensuring the charging safety.
Further, a plurality of liquid outlet holes which are uniformly and densely distributed are formed in the pipe wall of the liquid cooling inner pipe.
The beneficial effects are that: the cooling liquid flowing in the liquid cooling inner tube can be in direct contact with the inner surface of the conductor through the liquid outlet hole, so that heat in the conductor can be quickly absorbed.
Further, the liquid cooling inlet pipe is arranged between any two liquid cooling outer pipes and is in butt joint with the two liquid cooling outer pipes.
The beneficial effects are that: the liquid cooling inlet pipe also flows with cooling liquid, and after the liquid cooling inlet pipe is abutted with the liquid cooling outer pipe, the heat dissipation of the liquid cooling outer pipe can be quickened.
Further, the conductors comprise stranded copper conductors and braided copper conductors, wherein the stranded copper conductors are coated on the periphery of the liquid cooling inner tube, and the braided copper conductors are coated on the periphery of the stranded copper conductors.
The beneficial effects are that: the braided copper conductor is arranged on the periphery of the stranded copper conductor, so that the oxidation speed of the stranded copper conductor can be slowed down, the stranded copper conductor can be tightly bound, the stranded copper conductor is not easy to loosen, and the flow rate of cooling liquid and the heat transfer efficiency of the conductor can be optimized by adjusting the braiding density of the braided copper conductor.
Further, a plurality of protrusions are arranged on the inner wall of the liquid cooling outer tube around the circumference direction of the conductor, and the protrusions are abutted against the outer circumference of the conductor or are spaced from the outer circumference of the conductor by a set interval.
The beneficial effects are that: the bump can avoid the inner wall laminating of conductor and liquid cooling outer tube, guarantees to have the liquid flow channel that supplies the coolant liquid to get into all the time between liquid cooling outer tube and the conductor.
Further, a plurality of mounting grooves are formed in the inner pipe wall of the liquid cooling outer pipe around the circumference of the conductor, buffer springs are connected in each mounting groove, the end portions of the buffer springs are connected with buffer plates, and the buffer plates are in sliding sealing fit with the liquid cooling outer pipe.
The beneficial effects are that: when the temperature in the liquid cooling charging cable rises to increase the pressure in the liquid cooling charging cable, the buffer plate can be pushed to move in the mounting groove against the elastic force of the buffer spring, and the increased pressure is absorbed through the buffer spring, so that the inside of the liquid cooling charging cable is kept in a relatively stable environment.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the invention are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a schematic cross-sectional view of embodiment 1 of a liquid cooled charging cable of the present invention;
FIG. 2 is a schematic cross-sectional view of embodiment 2 of the liquid cooled charging cable of the present invention;
fig. 3 is a schematic cross-sectional view of embodiment 3 of the liquid-cooled charging cable of the present invention.
Reference numerals illustrate:
1-liquid cooling the inner tube; 2-liquid outlet holes, 3-charging main lines, 4-stranded copper conductors, 5-braided copper conductors, 6-signal lines, 7-liquid cooling outer tubes, 8-filling materials, 9-wrapping belts, 10-jackets, 11-liquid cooling inlet pipes, 12-first liquid flow channels, 13-second liquid flow channels, 14-grounding wires, 15-auxiliary power lines and 16-control lines; 17-bulge, 18-installation groove, 19-buffer spring, 20-buffer plate.
Detailed Description
The following description of the embodiments of the present invention will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments thereof.
The invention provides an embodiment 1 of a liquid cooling charging cable, which comprises the following components:
the liquid cooling charging cable can be applied to high-power charging equipment, such as a charging pile or a charging gun. As shown in fig. 1, the liquid-cooled charging cable includes a sheath 10, and a housing cavity is provided in the sheath 10, and a liquid-cooled inlet pipe 11, a charging main line 3, a signal line 6, a filler 8, a ground line 14, an auxiliary power line 15, and a control line 16 are provided in the housing cavity. The sheath 10 comprises a protective layer and a belting 9, wherein the protective layer is made of thermoplastic polyurethane elastomer rubber, has the characteristics of high wear resistance and high tearing resistance, and has good protective effect on each wire core; the wrapping tape 9 can completely wrap each wire core, and the wrapping tape 9 has the functions of fire prevention and flame retardance. The filler material 8 is arranged in the gaps between the different cores and is able to support each core.
Specifically, the liquid cooling inlet pipe 11 is provided with one, and the charging main line 3 is provided with two, and is used as an anode and a cathode connected with high-power charging equipment. Each charging main line 3 comprises a liquid cooling outer tube 7, a conductor and a liquid cooling inner tube 1, and the conductor and the liquid cooling inner tube 1 are both positioned in the liquid cooling outer tube 7. The conductors are formed by stranded copper conductors 4 and braided copper conductors 5, specifically bare copper conductors are braided with tinned copper wires after being stranded and stranded again, so that the bare copper conductors have strong current carrying capacity. In addition, the tin-copper wire is adopted for braiding, so that the oxidation speed of the bare copper conductor can be reduced, and the bare copper conductor can be tightly bound, so that the bare copper conductor is not easy to loosen. The optimal braiding density of the tinned copper wires is 83% -87%, so that the flow rate of the cooling liquid and the heat transfer efficiency of the conductor can be optimized. The twisted copper conductor 4 is directly twisted on the outer periphery of the liquid cooling inner tube 1, the outer peripheral surface of the braided copper conductor 5 and the inner wall surface of the liquid cooling outer tube 7 are arranged at intervals to form a first liquid flow channel 12 for cooling liquid to flow between the two, and the inner cavity of the liquid cooling inner tube 1 forms a second liquid flow channel 13 for cooling liquid to flow.
The liquid cooling inlet pipe 11 is arranged between the two charging main lines 3 and is in tangent abutting connection with the liquid cooling outer pipes 7 of the two charging main lines 3. The liquid cooling inlet pipe 11 is communicated with the first flow channel 12 and the second flow channel 13 in each charging main line 3, and can form a cooling circuit, and the flow directions of the cooling liquid in the first flow channel 12 and the second flow channel 13 are the same. The liquid cooling inlet pipe 11 also flows with cooling liquid, and after the liquid cooling inlet pipe 11 is abutted with the liquid cooling outer pipe 7, the heat dissipation of the liquid cooling outer pipe 7 can be quickened.
When in actual use, the head of the liquid cooling charging cable is generally connected with the charging terminal to realize circuit conduction, at the moment, cooling liquid can flow in from the tail of the liquid cooling inlet pipe 11 and flow to the head of the liquid cooling charging cable along the liquid cooling inlet pipe 11 to cool the charging terminal; since the liquid cooling inlet pipe 11 is communicated with each first flow channel 12 and each second flow channel 13, the cooling liquid can flow back to the tail of the liquid cooling charging cable along the first flow channel 12 and the second flow channel 13, thereby cooling the charging main line 3.
Because the cooling liquid in the second liquid flow channel 13 is isolated from the stranded copper conductor 4 by the liquid cooling inner tube 1, in order to more fully exert the cooling effect of the cooling liquid, in this embodiment, a plurality of liquid outlet holes 2 which are uniformly and densely distributed are arranged on the tube wall of the liquid cooling inner tube 1, and at this time, the cooling liquid can directly contact with the surface of the stranded copper conductor 4 through the liquid outlet holes 2, thereby rapidly cooling the stranded copper conductor 4.
The main factors considered in selecting the cooling pipes are the flow rate and the flow rate of the cooling liquid; the hardness, bursting pressure, overall outer diameter and the like of the pipeline materials are key, and the selection of the materials is an important factor for determining the service life of the liquid cooling charging cable. The liquid cooling outer tube and the liquid cooling inner tube can adopt one of TPO (thermoplastic polyolefin), TPE (thermoplastic elastomer), PA (polyamide), TPU (polyurethane) and PA composite material, preferably PA composite material, and have higher tensile strength, hardness, high temperature resistance, oil resistance, acid and alkali resistance and bursting pressure.
The cooling liquid is a medium for heat exchange, the cooling effect of different cooling liquids is different, and when the cooling liquid is selected, the flow rate, safety, environmental protection, whether oxidation corrosion exists on a conductor and the like of the cooling liquid in a cooling pipeline are considered in addition to the cooling effect. In this embodiment, the cooling liquid is preferably an insulating liquid having a good heat conductivity, and for example, transformer oil, capacitor oil, cable oil, silicone oil, mineral oil, or the like can be used.
When the liquid cooling charging cable is used, the charging main line is electrically connected with external charging equipment to conduct a circuit, after the circuit is conducted, the braided copper conductor and the stranded copper conductor can generate a large amount of heat, the cooling liquid in the first liquid flow channel can take away the heat on the surfaces of the braided copper conductor and the stranded copper conductor, and the cooling liquid in the second liquid flow channel can take away the heat in the braided copper conductor and the stranded copper conductor, so that the braided copper conductor and the stranded copper conductor can be radiated in time, the temperature of the braided copper conductor and the stranded copper conductor is in a safe range, and potential safety hazards caused by overhigh conductor temperature are avoided. In addition, the heat generated by the conductor taken away by adopting the double-layer cooling mode is much higher than that taken away by the single-layer cooling mode, so that the conductor with smaller sectional area can be adopted by the double-layer cooling conductor under the condition of the same current carrying, and the material is saved.
The liquid cooling charging cable can cool the surface of the conductor, simultaneously cool the center of the conductor, cool the same conductor twice, and realize better cooling effect and faster cooling.
Embodiment 2 of the liquid-cooled charging cable provided by the present invention:
the differences from example 1 are mainly that: in example 1, the conductor was floated in the liquid-cooled outer tube by the cooling liquid in the first liquid flow passage. In this embodiment, in order to avoid the adhesion of the conductor to the inner wall of the liquid-cooled outer tube 7, as shown in fig. 2, a plurality of protrusions 17 are provided on the inner wall of the liquid-cooled outer tube 7 around the circumference of the braided copper conductor 5, and the protrusions 17 are in contact with the outer circumference of the braided copper conductor 5 to support the entire conductor within the liquid-cooled outer tube 7. Of course, a certain height interval may be left between the protrusion 17 and the conductor, so long as the conductor is ensured not to contact with the inner wall of the liquid cooling outer tube 7.
Embodiment 3 of the liquid-cooled charging cable provided by the present invention:
the differences from example 1 are mainly that: as shown in fig. 3, in this embodiment, a plurality of mounting grooves 18 are formed in the inner tube wall of the liquid cooling outer tube 7 around the circumferential direction of the braided copper conductor 5, a buffer spring 19 is connected in each mounting groove 18, a buffer plate 20 is connected to the end of the buffer spring 19, and the buffer plate 20 is in sliding sealing fit with the liquid cooling outer tube 7. In this way, when the temperature in the liquid cooling charging cable increases to increase the pressure in the liquid cooling charging cable, the buffer plate 20 can be pushed to move in the mounting groove 18 against the elastic force of the buffer spring 19, and the buffer spring 19 absorbs the increased pressure, so that a relatively stable environment is maintained in the liquid cooling charging cable. Of course, in addition to this embodiment, the protrusion 17 in embodiment 2 may be added to the inner wall of the liquid-cooled outer tube 7.
Example 4 of the liquid-cooled charging cable provided by the present invention:
the differences from example 1 are mainly that: in embodiment 1, a plurality of liquid outlet holes are uniformly and densely distributed on the pipe wall of the liquid cooling inner pipe to further improve the cooling and heat dissipation effects, in this embodiment, the cooling liquid in the liquid cooling inner pipe is blocked by the liquid cooling inner pipe and cannot directly contact with the inner surface of the conductor, but the ideal heat dissipation effects can be achieved only by the cooling liquid of the liquid cooling inner pipe, so in this embodiment, the liquid outlet holes are not formed on the liquid cooling inner pipe.
Example 5 of the liquid-cooled charging cable provided by the present invention:
the differences from example 1 are mainly that: in embodiment 1, the liquid cooling inlet pipe is disposed between two charging main lines and is in contact with the liquid cooling outer pipe of the charging main line. In this embodiment, the liquid cooling inlet pipe is arranged at an interval from the charging main line while ensuring the cooling effect.
Example 6 of the liquid-cooled charging cable provided by the present invention:
the differences from example 1 are mainly that: in embodiment 1, the conductors include stranded copper conductors and braided copper conductors, and in this embodiment, the conductors are bare conductors, and braided conductors are not provided around the conductors.
Example 7 of the liquid-cooled charging cable provided by the present invention:
the differences from example 1 are mainly that: in embodiment 1, one liquid cooling inlet pipe is provided, and in this embodiment, two liquid cooling inlet pipes are provided, and two liquid cooling inlet pipes are arranged at intervals and are in tangent butt with the liquid cooling outer pipes of two charging main lines.
Embodiments of the charging device of the present invention:
the charging device includes a liquid cooling charging cable, and the structure of the liquid cooling charging cable is the same as that in the embodiment of each liquid cooling charging cable, which is not described in detail herein.
Claims (5)
1. The liquid cooling charging cable comprises at least one liquid cooling inlet pipe and at least two charging main lines, and is characterized in that the charging main lines comprise a liquid cooling outer pipe, a conductor and a liquid cooling inner pipe, wherein the conductor is arranged in the liquid cooling outer pipe, the conductor is coated on the periphery of the liquid cooling inner pipe, the outer wall of the conductor and the inner wall of the liquid cooling outer pipe are arranged at intervals to form a first liquid flow channel for cooling liquid to flow, the inner cavity of the liquid cooling inner pipe forms a second liquid flow channel for cooling liquid to flow, and the liquid cooling inlet pipe is communicated with the liquid cooling outer pipe and the liquid cooling inner pipe to form a cooling loop;
a plurality of bulges are arranged on the inner wall of the liquid cooling outer tube around the circumference direction of the conductor, and the bulges are abutted against the periphery of the conductor or are spaced from the periphery of the conductor by a set interval;
a plurality of mounting grooves are formed in the inner pipe wall of the liquid cooling outer pipe around the circumference direction of the conductor, buffer springs are connected in each mounting groove, the end portions of the buffer springs are connected with buffer plates, and the buffer plates are in sliding sealing fit with the liquid cooling outer pipe.
2. The liquid cooling charging cable according to claim 1, wherein a plurality of liquid outlet holes which are uniformly and densely distributed are arranged on the wall of the liquid cooling inner tube.
3. The liquid-cooled charging cable of claim 1, wherein the liquid-cooled inlet tube is disposed between any two of the liquid-cooled outer tubes and abuts both of the liquid-cooled outer tubes.
4. The liquid cooled charging cable of any one of claims 1-3, wherein the conductors comprise stranded copper conductors wrapped around the outer periphery of the liquid cooled inner tube and braided copper conductors wrapped around the outer periphery of the stranded copper conductors.
5. Charging device comprising a liquid-cooled charging cable, characterized in that the liquid-cooled charging cable is according to any one of claims 1-4.
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| CN202311144975.7A CN116959799B (en) | 2023-09-06 | 2023-09-06 | Liquid cooling charging cable and charging device |
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| CN116959799B true CN116959799B (en) | 2024-03-26 |
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| CN117153477B (en) * | 2023-10-30 | 2024-02-02 | 广东南缆电缆有限公司 | Tensile dual cooling liquid cooling cable |
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| CN201229802Y (en) * | 2008-07-22 | 2009-04-29 | 芜湖明远电线电缆有限责任公司 | Water cooling special electric cable |
| CN207425394U (en) * | 2017-09-30 | 2018-05-29 | 深圳市沃尔新能源电气科技股份有限公司 | Liquid cold line cable |
| WO2022217432A1 (en) * | 2021-04-12 | 2022-10-20 | 浙江吉利控股集团有限公司 | High-voltage high-power liquid-cooled charging cable |
| CN219349853U (en) * | 2022-12-23 | 2023-07-14 | 长春捷翼汽车科技股份有限公司 | Liquid cooling cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018102207A1 (en) * | 2018-02-01 | 2019-08-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Vehicle charging cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201229802Y (en) * | 2008-07-22 | 2009-04-29 | 芜湖明远电线电缆有限责任公司 | Water cooling special electric cable |
| CN207425394U (en) * | 2017-09-30 | 2018-05-29 | 深圳市沃尔新能源电气科技股份有限公司 | Liquid cold line cable |
| WO2022217432A1 (en) * | 2021-04-12 | 2022-10-20 | 浙江吉利控股集团有限公司 | High-voltage high-power liquid-cooled charging cable |
| CN219349853U (en) * | 2022-12-23 | 2023-07-14 | 长春捷翼汽车科技股份有限公司 | Liquid cooling cable |
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