Intelligent liquid cooling high-power charging cable

Abstract

The utility model discloses an intelligent liquid cooling high-power charging cable which comprises a cable body, a charging gun and a charging pile, the cable body is arranged on one side of the charging gun, and the charging gun is connected with the charging pile through the cable body; the liquid circulation channel comprises a cooling pipe and is arranged in the cable body, meanwhile, liquid cooling liquid used for heat dissipation is added into the liquid circulation channel, and the power pump pushes the cooling liquid to circulate; a liquid cooling technology is utilized, a special liquid circulation channel is arranged between a cable body and a charging gun, liquid cooling liquid for heat dissipation is added into the channel, the cooling liquid is pushed to circulate through a power pump, heat generated in the charging process is taken away, the transmission power of the cable body is improved, and high-power charging is achieved. Intelligent monitoring of liquid leakage is achieved, safety and environmental protection are achieved, and electrical damage and fire accidents caused by liquid leakage are avoided; and heat dissipation and heating are combined, and high-temperature liquid can be injected into the pipe through a heating pump under the condition that the cable is rigid in winter, so that the cable body is heated to become soft, and the cable is convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, in particular to an intelligent liquid-cooled high-power charging cable. Background Art

[0002] With the development of society, the development of new energy vehicles is becoming more and more extensive. From the sales volume of new energy vehicles, the sales volume of new energy vehicles has been growing steadily, and the penetration rate has been continuously improving. However, the proportion of the reserved charging piles and the reserved new energy vehicles is very different, and it currently takes at least 30 minutes to charge a household new energy passenger car to 80%, which is mainly limited by the heating problem of the conductors and terminals during long-term charging with large currents, forcing the charging piles to limit the current when the temperature rises. This situation not only greatly limits the charging efficiency and increases the charging time of the vehicle, but also poses a fire hazard due to the serious heating of the cable.

[0003] Currently, most of the existing charging cables on the market are 250A 2×70, 80 square DC charging cables. The cables have large outer diameters, large weights, and are too bulky. The cables generate serious heat and pose a fire hazard. It is inconvenient for users to operate them during charging. For new energy vehicle owners, the biggest worry is not only the mileage, but also the charging time. The charging time of an AC charging pile is as short as 6 hours and as long as 8 hours. A DC charging pile is faster than a current charger, but it takes at least half an hour to charge the car from 20% to 80%, which cannot meet the future development trend of new energy vehicles and the actual needs of the majority of new energy vehicle users. Therefore, we propose an intelligent liquid-cooled high-power charging cable to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the utility model is to provide an intelligent liquid-cooled high-power charging cable to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An intelligent liquid-cooled high-power charging cable, comprising:

[0007] The cable body, the charging gun and the charging pile, the cable body is arranged on one side of the charging gun, and the charging gun is connected to the charging pile through the cable body;

[0008] The liquid circulation channel includes a cooling pipe and is arranged inside the cable body. At the same time, liquid coolant for heat dissipation is added into the liquid circulation channel, and the coolant circulation is driven by a power pump.

[0009] As a further solution of the utility model: the cable body includes an insulating core, a group of cooling tubes are arranged on both sides of the insulating core, multiple groups of conductors are arranged above and below the insulating core, heat conduction tubes are arranged on the outside of the insulating core, the two groups of cooling tubes and the multiple groups of conductors, a shielding layer is arranged on the outside of the heat conduction tube, and a sheath is arranged on the outside of the shielding layer.

[0010] As a further solution of the utility model: the conductor adopts Nihof wire drawing and stranding equipment, adopts a compressed conductor structure, and the outer diameter of the conductor is reduced by 0.3-0.5mm compared with the category 5 and category 6 conductors of the same specifications; the single wires of the conductor are arranged in an orderly and regular manner, and the surface is flat and seamless.

[0011] As a further solution of the utility model: the insulating core is made of FEP.

[0012] As a further solution of the utility model: the heat-conducting pipe is made of silicone material with a thermal conductivity of 1-1.5W / (mk), and is resistant to high-temperature pressure explosion: 90°C, 7bar, and does not break at a high-temperature brittle temperature of 150°C, and does not break at a low-temperature brittle temperature of -40°C. The heat-conducting pipe is in close contact with the insulating core, and dimethyl silicone oil is injected into the pipeline through a heat dissipation circulation pump to circulate and take away the heat charged in the cable core; it has a good cooling effect, good thermal conductivity, and strong resistance to explosion pressure.

[0013] As a further solution of the utility model: the shielding layer adopts double overall shielding of aluminum foil wrapping + tinned braiding.

[0014] As a further solution of the utility model: the sheath is designed with TPU.

[0015] As a further solution of the utility model: a bare copper wire core is placed inside the insulating wire core as a monitoring wire, connecting the charging gun electronic lock and the charging switch.

[0016] As a further solution of the utility model: a cooling liquid is arranged inside the cooling tube, and the cooling liquid is dimethyl silicone oil.

[0017] As a further solution of the utility model: the cooling tube adopts an inlet and outlet structure, and the conduit corresponding to the cooling tube can cool the cable body. During the charging process, one end of the conduit is connected to one end of the coolant channel, the other end of the conduit is used for liquid inlet, and the other end of the coolant channel is used for liquid outlet. The coolant enters from the liquid inlet end of the conduit and then flows out from the liquid outlet end of the coolant channel to achieve cooling of the cable body, wherein the liquid inlet end of the conduit and the liquid outlet end of the coolant channel can also be respectively connected to the liquid outlet and liquid inlet of a liquid cooling system to achieve circulation of the coolant; the liquid cooling system includes a pump, a control panel, a flow sensor, a liquid level switch, a fan, a temperature sensor, a pipe, a pipe joint, a pressure sensor and a heat exchanger.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] This intelligent liquid-cooled high-power charging cable uses liquid cooling technology to set up a special liquid circulation channel between the cable body and the charging gun. Liquid coolant is added to the channel for heat dissipation. The power pump drives the coolant circulation to take away the heat generated during the charging process, thereby increasing the transmission power of the cable body and achieving high-power charging.

[0020] This intelligent liquid-cooled high-power charging cable has intelligent leakage monitoring, is safe and environmentally friendly, and avoids electrical damage and fire accidents caused by leakage;

[0021] This intelligent liquid-cooled high-power charging cable uses both heat dissipation and heating. When the cable is stiff in winter, a heating pump can be used to inject high-temperature liquid into the tube to heat the cable body to make it soft, making it easier for users to operate and reducing damage to the cable body.

[0022] This intelligent liquid-cooled high-power charging cable has low heat generation, fast heat dissipation, and high safety. It has good temperature resistance and ensures normal operation in high temperature environments in summer.

[0023] This intelligent liquid-cooled high-power charging cable has a larger current and a faster charging speed. With a fast charging speed, when charging at 600KW power, it can fully charge a vehicle with a capacity of 800A in 10 minutes, saving charging time.

[0024] This intelligent liquid-cooled high-power charging cable has a small outer diameter and the charging equipment is light in weight. It is light in weight, easy and convenient for users to operate and provide a good experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 This is the operation flow chart of the liquid cooling system in the utility model.

[0027] Figure 3 It is a schematic diagram of the structure of the liquid-cooled charging cable in the present utility model.

[0028] Figure 4 It is a schematic diagram of the electrical principle of the utility model.

[0029] Figure 5 This is a temperature curve diagram of the outer sheath of the tested cable in the utility model.

[0030] Figure 6 This is a current temperature rise data curve diagram of the utility model.

[0031] Among them: 1. Insulated core; 2. Conductor; 3. Cooling tube; 4. Heat conduction tube; 5. Shielding layer; 6. Sheath. DETAILED DESCRIPTION

[0032] In one embodiment, Figure 1-Figure 6 As shown, an intelligent liquid-cooled high-power charging cable includes:

[0033] The cable body, the charging gun and the charging pile, the cable body is arranged on one side of the charging gun, and the charging gun is connected to the charging pile through the cable body;

[0034] The liquid circulation channel includes a cooling pipe 3 and is arranged inside the cable body. At the same time, a cooling liquid for heat dissipation is added into the liquid circulation channel, and the cooling liquid circulation is driven by a power pump;

[0035] Using liquid cooling technology, a special liquid circulation channel is set up between the cable body and the charging gun. Liquid coolant is added to the channel for heat dissipation. The coolant circulation is driven by a power pump to take away the heat generated during the charging process, so as to increase the transmission power of the cable body and achieve high-power charging.

[0036] The cable body comprises an insulating core 1, a group of cooling tubes 3 are arranged on both sides of the insulating core 1, multiple groups of conductors 2 are arranged above and below the insulating core 1, a heat pipe 4 is arranged outside the insulating core 1, the two groups of cooling tubes 3 and the multiple groups of conductors 2, a shielding layer 5 is arranged outside the heat pipe 4, and a sheath 6 is arranged outside the shielding layer 5;

[0037] DC+, DC- uses a multi-core shunt design to improve the current carrying capacity and heat dissipation effect of the core, while reducing the outer diameter of the cable body;

[0038] Conductor 2 adopts Niehoff wire drawing and stranding equipment and adopts a compact conductor structure. The outer diameter of conductor 2 is 0.3-0.5mm smaller than that of Category 5 and Category 6 conductors of the same specification. The single wires of conductor 2 are arranged in an orderly and regular manner, with a smooth surface and no gaps, which further reduces the outer diameter of the cable body and improves the current carrying capacity of the conductor.

[0039] The insulation core 1 is made of FEP, which has excellent electrical and mechanical properties and a temperature resistance of up to 250°C, and can operate normally under high temperature conditions during fast charging;

[0040] The heat conducting pipe 4 is made of silicone material, with a thermal conductivity of 1-1.5W / (mk), and is resistant to high temperature pressure explosion: 90°C, 7bar, high temperature brittle temperature of 150°C without rupture, and low temperature brittle temperature of -40°C without rupture. The heat conducting pipe 4 is in close contact with the insulating core 1, and dimethyl silicone oil is injected into the pipeline through a heat dissipation circulation pump to circulate and take away the heat charged in the cable core; it has a good cooling effect, good thermal conductivity, and strong resistance to explosion pressure;

[0041] The shielding layer 5 adopts double overall shielding of aluminum foil wrapping + tinned braiding to ensure that the cable control core is not interfered by external signals during operation and ensure the normal operation of the line;

[0042] The sheath 6 is designed with TPU, which has excellent hydrolysis resistance, acid resistance, alkali resistance, ozone resistance, and aging resistance, and prevents environmental cracking and hydrolysis during the use of the cable body;

[0043] A bare copper wire core is placed inside the insulated wire core 1 as a monitoring wire, which connects the charging gun electronic lock and the charging switch. Once leakage occurs, the internal monitoring wire core will send a signal in time to cut off the power supply in time to prevent fire and personal injury caused by high current; intelligent monitoring of leakage, safety and environmental protection, to avoid electrical damage and fire accidents caused by leakage;

[0044] The bare copper conductor uses two 2.5 square Class A bare copper conductors that comply with GB / T3956. At the same time, the 2.5 square Class A bare copper conductors must meet the following requirements: 1) Maximum DC resistance at 20℃ ≤ 7.41Ω / km; 2) Elongation at break ≥ 20%. When winding, the pitch of the two Class A conductors is controlled at 100mm±10mm. The small pitch design is adopted. The Class A conductor is harder, easier to shape, symmetrical, more beautiful, and can form a flow channel in the coolant channel, which can improve the fluidity of the liquid and improve the efficiency of heat dissipation.

[0045] The cooling tube 3 is provided with cooling liquid inside, and the cooling liquid is dimethyl silicone oil; it has excellent insulation performance, good dielectric properties, high water repellency, high compressibility, low surface tension, good thermal stability, good leveling, easy to wipe off, odorless and non-toxic in nature, and the product is a non-hazardous non-volatile carrier to avoid short-circuit damage caused by leakage, double protection; the liquid cooling technology of the liquid-cooled charging cable can effectively prevent overheating during charging. This can improve the safety of charging, reduce potential risks, and maintain stable performance during long-term high-power charging. Through the circulation of the coolant, the temperature of the charging gun can be effectively controlled to prevent overheating and performance degradation;

[0046] Less heat generation, fast heat dissipation, high safety; good temperature resistance, ensuring normal operation in high temperature conditions in summer;

[0047] The cooling pipe 3 is arranged in a one-in-one-out structure.

[0048] In winter, when the cable is stiff, the circulating pump can be used to heat the coolant, inject high temperature into the pipe, heat the cable body to make it soft, facilitate user operation, and reduce damage to the cable body; use heat dissipation and heating at the same time. In winter, when the cable is stiff, the heating pump can be used to inject high temperature liquid into the pipe, heat the cable body to make it soft, facilitate user operation, and reduce damage to the cable body;

[0049] The outer diameter of the cable is small, and the charging equipment is light; light weight makes it easy and convenient for users to operate and provide a good experience;

[0050] The conduit corresponding to the cooling tube 3 can cool the cable body. During the charging process, one end of the conduit is connected to one end of the coolant channel, the other end of the conduit is used for liquid inlet, and the other end of the coolant channel is used for liquid outlet. The coolant enters from the liquid inlet end of the conduit and then flows out from the liquid outlet end of the coolant channel to achieve cooling of the cable body. The liquid inlet end of the conduit and the liquid outlet end of the coolant channel can also be respectively connected to the liquid outlet and liquid inlet of a liquid cooling system to achieve circulation of the coolant. The liquid cooling system includes a pump, a control panel, a flow sensor, a liquid level switch, a fan, a temperature sensor, a pipe, a pipe & joint, a pressure sensor and a heat exchanger.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent liquid-cooled high-power charging cable, characterized in that: include: The cable body is arranged on one side of the charging gun, and the charging gun is connected to the charging pile through the cable body; The liquid circulation channel comprises a cooling pipe (3) and is arranged inside the cable body. Liquid coolant for heat dissipation is added into the liquid circulation channel and the coolant circulation is driven by a power pump.

2. The intelligent liquid-cooled high-power charging cable according to claim 1, characterized in that: The cable body comprises an insulating core (1), a group of cooling tubes (3) are arranged on both sides of the insulating core (1), multiple groups of conductors (2) are arranged above and below the insulating core (1), a heat conduction tube (4) is arranged outside the insulating core (1), the two groups of cooling tubes (3) and the multiple groups of conductors (2), a shielding layer (5) is arranged outside the heat conduction tube (4), and a sheath (6) is arranged outside the shielding layer (5).

3. The intelligent liquid-cooled high-power charging cable according to claim 2, characterized in that: The conductor (2) is made of Nihof wire drawing and stranding equipment and has a compacted conductor structure. The outer diameter of the conductor (2) is 0.3-0.5 mm smaller than that of Category 5 and Category 6 conductors of the same specification. The single wires of the conductor (2) are arranged in an orderly and regular manner, and the surface is flat and has no gaps.

4. The intelligent liquid-cooled high-power charging cable according to claim 2, characterized in that: The insulating wire core (1) is made of FEP.

5. The intelligent liquid-cooled high-power charging cable according to claim 2, characterized in that: The heat conducting pipe (4) is made of silicone material with a thermal conductivity of 1-1.5 W / (mk), high temperature pressure explosion resistance: 90°C, 7 bar, high temperature brittle temperature of 150°C without rupture, and low temperature brittle temperature of -40°C without rupture. The heat conducting pipe (4) is in close contact with the insulating wire core (1), and dimethyl silicone oil is injected into the pipe for circulation through a heat dissipation circulation pump to take away the heat generated in the cable core.

6. The intelligent liquid-cooled high-power charging cable according to claim 2, characterized in that: The shielding layer (5) adopts double overall shielding of aluminum foil wrapping + tinned braiding.

7. The intelligent liquid-cooled high-power charging cable according to claim 2, characterized in that: The protective sleeve (6) is designed using TPU.

8. The intelligent liquid-cooled high-power charging cable according to claim 2, characterized in that: A bare copper wire core is placed inside the insulating wire core (1) as a monitoring wire, which is connected to the charging gun electronic lock and the charging switch.

9. The intelligent liquid-cooled high-power charging cable according to claim 1, characterized in that: A cooling liquid is arranged inside the cooling tube (3), and the cooling liquid is dimethyl silicone oil.

10. The intelligent liquid-cooled high-power charging cable according to claim 1, characterized in that: The cooling tube (3) is arranged with a one-in-one-out structure, and the conduit corresponding to the cooling tube (3) cools the cable body. During the charging process, one end of the conduit is connected to one end of the cooling liquid channel, the other end of the conduit is used for liquid inlet, and the other end of the cooling liquid channel is used for liquid outlet. The cooling liquid enters from the liquid inlet end of the conduit and then flows out from the liquid outlet end of the cooling liquid channel to achieve cooling of the cable body. The liquid inlet end of the conduit and the liquid outlet end of the cooling liquid channel can also be respectively connected to the liquid outlet and liquid inlet of a liquid cooling system to achieve circulation of the cooling liquid. The liquid cooling system comprises a pump, a control panel, a flow sensor, a liquid level switch, a fan, a temperature sensor, a pipeline, a pipeline joint, a pressure sensor and a heat exchanger.

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