Shielded vehicle-mounted self-temperature measuring cable and its terminal block

Abstract

The utility model discloses a shielded vehicle-mounted self-temperature measuring cable, comprising: a self-temperature measuring insulating core wire, two self-temperature measuring insulating core wires are twisted into a twisted pair, a nylon hose and a tensile rope are filled in the twisted pair, an isolation layer, an inner sheath, an aluminum-plastic composite tape layer, a metal braided layer and an outer sheath are sequentially arranged on the twisted pair from the inside to the outside, the self-temperature measuring insulating core wire comprises: a copper-tin alloy monomer, a temperature measuring optical fiber and an insulating layer, a plurality of copper-tin alloy monomers are twisted into a conductor with the temperature measuring optical fiber as the center, and an insulating layer is extruded on the conductor. It has good flexibility, high shielding performance and can realize automatic temperature measurement and cooling. The wiring terminal comprises: an external sleeve and an inner cone sleeve, the inner cone sleeve is inserted into the cone hole of the external sleeve, a step through hole is arranged in the inner cone sleeve, a compression sleeve is threadedly connected on the outer wall of the external sleeve, and the compression sleeve rests on the inner cone sleeve. When connected to the self-temperature measuring insulating core wire, the temperature measuring optical fiber can be avoided, so that the temperature measuring optical fiber can be connected conveniently.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a shielded vehicle-mounted self-temperature measuring cable and a wiring terminal thereof. Background Art

[0002] At present, the electric vehicle industry is booming. Compared with traditional fuel vehicles, electric vehicles have higher requirements for cables. First, the rated voltage of fuel vehicles is mostly 60V, while the rated voltage of electric vehicles is between 600V and 1000V. High voltage will produce high transmission cables. The current of electric vehicles can reach 250A to 450A, and the result of high voltage and high current transmission will lead to high cable temperature. Excessive cable temperature will not only easily reduce battery performance and shorten battery life, but also cause more serious accidents such as leakage and fire; secondly, the cables in electric vehicles will generate strong electromagnetic radiation due to high voltage and high current. Strong electromagnetic radiation will cause electromagnetic interference to other electronic equipment in the car, which is easy to affect the normal operation of other electronic equipment, and it is also easy to cause electromagnetic radiation to people in the car; finally, since the battery, controller, driver and other related components of electric vehicles are usually distributed in different parts of the vehicle, this decentralized layout requires the cables connecting these components to have high flexibility to facilitate wiring in complex spaces and absorb vibration. Utility Model Content

[0003] The utility model aims to provide a shielded vehicle-mounted self-temperature measuring cable and a connecting terminal thereof which has good shielding performance and can automatically measure temperature for protection.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a shielded vehicle-mounted self-temperature measuring cable, comprising: a self-temperature measuring insulating core wire, an isolation layer, an inner sheath, an aluminum-plastic composite tape layer, a metal braided layer and an outer sheath, two self-temperature measuring insulating core wires are twisted into a twisted pair, and the gaps on both sides of the twisted pair are respectively filled with nylon hoses and tensile ropes, an isolation layer is wrapped around the twisted pair, an inner sheath is extruded on the isolation layer, an aluminum-plastic composite tape layer is wrapped around the inner sheath, a metal braided layer is woven on the aluminum-plastic composite tape layer, and an outer sheath is extruded on the metal braided layer, the self-temperature measuring insulating core wire comprises: a copper-tin alloy monomer, a temperature measuring optical fiber and an insulating layer, a plurality of copper-tin alloy monomers are twisted into a conductor with the temperature measuring optical fiber as the center, and an insulating layer is extruded on the conductor.

[0005] Furthermore, in the aforementioned shielded vehicle-mounted self-temperature measuring cable, the insulating layer and the inner sheath are both made of polypropylene material.

[0006] Furthermore, in the aforementioned shielded vehicle-mounted self-temperature measuring cable, the isolation layer is a foamed PP tape.

[0007] Furthermore, in the aforementioned shielded vehicle-mounted self-temperature measuring cable, the metal braided layer is woven from 8 φ0.08 mm tinned copper wires, and the braiding density is greater than 90%.

[0008] Furthermore, in the aforementioned shielded vehicle-mounted self-temperature measuring cable, the outer sheath is made of TPS material.

[0009] Furthermore, in the aforementioned shielded vehicle-mounted self-temperature measuring cable, the tensile rope is made of PP material, and the diameter of the tensile rope is similar to the outer diameter of the nylon hose.

[0010] The wiring terminal includes: an outer sleeve and an inner conical sleeve made of metal. The outer sleeve is provided with a connected straight hole and a conical hole. The inner conical sleeve is inserted into the conical hole of the outer sleeve. The inner conical sleeve is provided with a stepped through hole capable of passing the self-temperature measuring insulating core wire in the shielded vehicle-mounted self-temperature measuring cable. A compression sleeve is threadedly connected to the outer wall of the outer sleeve, and the compression sleeve rests on the inner conical sleeve.

[0011] Furthermore, in the aforementioned terminal block, an annular step groove is provided on the external sleeve, and a metal clamp is provided on the annular step groove.

[0012] The advantages of the utility model are: good flexibility, capable of wiring in complex spaces, and absorbing energy during the driving of the car, high electrical performance, capable of withstanding higher voltages and currents, strong shielding performance, and capable of preventing electromagnetic radiation inside the cable from radiating to the outside, and preventing external signals from interfering with the cable; the temperature measuring optical fiber is filled in the conductor to form a self-temperature measuring insulating core wire, which can accurately monitor the temperature of the self-temperature measuring insulating core wire, and after the nylon hose is provided, it can be connected to an external water cooling or air cooling device, and when the temperature of the self-temperature measuring insulating core wire monitored by the temperature measuring optical fiber is too high, it can be cooled by water cooling or air cooling; and the connection The wire terminal is designed to cooperate with the connection of the self-temperature measuring insulated core wire. When the self-temperature measuring insulated core wire is inserted into the inner cone sleeve in the terminal, the inner cone sleeve only contacts the conductor surrounding the outer periphery of the temperature measuring optical fiber, preventing the inner cone sleeve from damaging the temperature measuring optical fiber when crimping with the conductor. When using the terminal for cable docking, the temperature measuring optical fiber between the two cables can be connected and then clamped with a metal clamp to form a complete passage. The temperature measuring optical fiber located between the two terminals can also measure the temperature of the terminals. The terminal can also be connected to the traditional copper wiring nose and then connected to the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of the structure of a shielded vehicle-mounted self-temperature measuring cable.

[0014] Figure 2 The utility model is a wiring terminal and Figure 1Schematic diagram of the structure when the self-temperature measuring insulated core wires are connected.

[0015] Figure 3 It is a structural schematic diagram of the wiring terminal of the utility model when it is connected with a traditional insulating core wire and then connected with a copper wiring nose. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0017] like Figure 1 As shown, the shielded vehicle-mounted self-temperature measuring cable described in the utility model comprises: a self-temperature measuring insulating core wire 1, an isolation layer 2, an inner sheath 3, an aluminum-plastic composite tape layer 4, a metal braided layer 5 and an outer sheath 6. Two self-temperature measuring insulating core wires 1 are twisted into a pair of twisted wires. The gaps on both sides of the twisted wires are respectively filled with a nylon hose 9 and a tensile rope 10 made of PP material. The nylon hose 9 can cool the self-temperature measuring insulating core wire 1 through a coolant or ventilation. The tensile rope 10 can improve the tensile performance of the cable and the tightness of the internal structure of the cable to prevent the twisted wires from being installed or moved. Movement or friction occurs during the movement. The diameter of the tensile rope 10 is similar to the outer diameter of the nylon hose 9. An isolation layer 2 is wrapped around the twisted wire. When the isolation layer 2 is wrapped around the twisted wire for cabling, the diameter of the tensile rope 10 is similar to the outer diameter of the nylon hose 9, so the roundness after cabling can be guaranteed. The isolation layer 2 is a foamed PP tape. The PP material has excellent heat resistance and can maintain stable performance under high temperature conditions. The foamed PP material has excellent electrical insulation performance and a low dielectric constant, which can reduce electromagnetic interference. It also has physical properties such as light specific gravity and high tensile strength. When the isolation layer 2 made of foamed PP tape is used to wrap the twisted wire, the twisted wire can be tied tightly and the flexibility after being cabled can be ensured. In this embodiment, a foamed PP tape with a width of 8 mm and a thickness of 0.06 mm is selected. Under the condition of ensuring the wrapping effect, the material consumption can be reduced. An inner sheath 3 made of polypropylene material is extruded on the isolation layer 2, and an aluminum-plastic composite tape layer 4 is wrapped on the inner sheath 3. A metal braided layer 5 is woven on the aluminum-plastic composite tape layer 4. The aluminum foil layer on the aluminum-plastic composite tape 4 is in contact with the metal braided layer 5. The metal braided layer 5 consists of 8 φ The cable is woven from 0.08 mm tinned copper wire with a weaving density greater than 90%. The metal braided layer 5 is combined with the aluminum-plastic composite tape 4 to improve the shielding performance of the cable. An outer sheath 6 made of TPS material is extruded on the metal braided layer 5. The TPS material has good flexibility, elasticity and flame retardancy. In this embodiment, the thickness of the outer sheath 6 is 0.7 mm to 0.8 mm. Since an inner sheath 3 for electrical protection is additionally provided, the thickness of the outer sheath 6 is appropriately reduced, thereby ensuring the flexibility of the cable while maintaining the original ability to resist the external environment.

[0018] In this embodiment, the self-temperature measuring insulated core wire 1 includes: a copper-tin alloy monomer 11, a temperature measuring optical fiber 12 and an insulating layer 13. A plurality of copper-tin alloy monomers 11 are twisted into a conductor with the temperature measuring optical fiber 12 as the center. The temperature measuring optical fiber 12 is a prior art. The copper-tin alloy monomer 11 has high strength and wear resistance on the basis of meeting the requirements of electrical applications. The temperature measuring optical fiber 12 is arranged at the center of the conductor. The temperature measuring optical fiber 12 can directly measure the temperature of the conductor to improve the accuracy of temperature measurement. Compared with the structure on the market that the temperature measuring optical fiber 12 is arranged on the outer layer of the cable or outside the insulating core wire, it can avoid the situation of inaccurate temperature measurement due to different laying states of the cable, changes in the external environment and other factors. An insulating layer 13 made of polypropylene material is extruded on the conductor, and an isolation layer 2 made of foamed PP tape is wrapped around the insulating layer 13 made of polypropylene material. The inner sheath 3 made of polypropylene material can form a thicker electrical insulation protection layer and a physical retention layer, thereby improving the physical protection performance and electrical performance of the cable, so that the cable can withstand larger voltage and current.

[0019] When installing the shielded vehicle-mounted self-temperature measuring cable described in the utility model, it is necessary to connect the temperature measuring optical fibers 12 in the two butt-jointed cables, which requires the use of Figure 2 The wiring terminal 7 shown in the figure comprises: an outer sleeve 71 and an inner tapered sleeve 72, both of which are made of metal material with excellent conductive properties, and the outer sleeve 71 is provided with a connected straight hole and a tapered hole, the inner tapered sleeve 72 is inserted into the tapered hole of the outer sleeve 71, and the inner tapered sleeve 72 is provided with a stepped through hole capable of passing the self-temperature measuring insulating core wire 1 in the shielded vehicle-mounted self-temperature measuring cable, and a pressing sleeve 73 is threadedly connected to the outer wall of the outer sleeve 71, and the pressing sleeve 73 abuts against the inner tapered sleeve 72. When the self-temperature-measuring insulated core wire 1 needs to be connected to the terminal 7, the insulating layer 13 on the self-temperature-measuring insulated core wire 1 is firstly stripped off to expose the conductor, and then the conductor is cut to expose the temperature-measuring optical fiber 12, and then the insulating core wire 1 is inserted into the inner cone sleeve 72, and the conductor composed of the copper-tin alloy monomer 11 and the temperature-measuring optical fiber 12 are both inserted into the small-diameter section of the step hole of the inner cone sleeve 72, and the insulating layer 13 on the insulating core wire 1 is inserted into the large-diameter section of the step hole and abuts against the large-diameter section, and then the inner cone sleeve 72 is inserted into the cone hole of the outer sleeve 71, and then the inner cone sleeve 72 is pressed. The sleeve 73 is threaded onto the external sleeve 71, and the thrust of the pressing sleeve 73 is used to squeeze the inner conical sleeve 72 into the conical hole of the external sleeve 71, so that the insulating core wire 1 is clamped in the terminal 7. At this time, the temperature measuring optical fiber 12 in the insulating core wire 1 extends outward. When the insulating core wires 1 in the two cables are respectively installed in the two terminal blocks 7, the temperature measuring optical fibers 12 in the two insulating core wires 1 are connected. An annular step groove 74 is provided on the outer side wall of the external sleeve 71 of the terminal block 7, and a metal clamp 8 is provided between the annular step grooves 74 of the two terminal blocks 7.

[0020] When the terminal block 7 in this embodiment is connected to a common cable, the insulated core wire can be fixed, and a conventional copper wiring nose can be installed on the annular step groove 74 to connect with the electrical equipment. Figure 3 shown.

[0021] After installing the shielded vehicle-mounted self-temperature measuring cable described in the utility model into an electric vehicle, it is necessary to connect the nylon hose 9 to the air-conditioning system of the electric vehicle, and a solenoid valve is arranged between each nylon hose 9 and the air-conditioning system. When the cable is connected to the temperature measuring system, it is connected using the terminal 7 described in the above embodiment. A first temperature threshold and a second temperature threshold are set in the temperature measuring system, and the second temperature threshold is greater than the first temperature threshold. When the temperature measuring optical fiber 12 detects that the temperature of the self-temperature measuring insulating core wire 1 is higher than the first temperature threshold, it means that the cable temperature is high, which will affect the service life of the cable and the battery. The temperature measuring system will control the air-conditioning system to turn on and open the corresponding solenoid valve, and the cold air in the air-conditioning system will be sent into the nylon hose 9 to cool the self-temperature measuring insulating core wire 1 with an excessively high temperature. If the temperature of the self-temperature measuring insulating core wire 1 continues to rise after air cooling and reaches the second temperature threshold, it means that the cable temperature is extremely high, which is prone to leakage or fire. The temperature measuring system will sound an alarm and perform power-off protection.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. Shielded vehicle-mounted self-temperature measuring cable, characterized by: include: A self-temperature-measuring insulated core wire, an isolation layer, an inner sheath, an aluminum-plastic composite tape layer, a metal braided layer and an outer sheath. Two self-temperature-measuring insulated core wires are twisted into a pair of twisted wires. The gaps on both sides of the twisted wires are filled with nylon hoses and tensile ropes respectively. An isolation layer is wrapped around the twisted wires, an inner sheath is extruded on the isolation layer, an aluminum-plastic composite tape layer is wrapped around the inner sheath, a metal braided layer is woven on the aluminum-plastic composite tape layer, and an outer sheath is extruded on the metal braided layer. The self-temperature-measuring insulated core wire comprises: a copper-tin alloy monomer, a temperature-measuring optical fiber and an insulation layer. Several copper-tin alloy monomers are twisted into a conductor with the temperature-measuring optical fiber as the center, and an insulation layer is extruded on the conductor.

2. The shielded vehicle-mounted self-temperature measuring cable according to claim 1, characterized in that: The insulation layer and inner sheath are made of polypropylene material.

3. The shielded vehicle-mounted self-temperature measuring cable according to claim 2, characterized in that: The isolation layer is a foamed PP tape.

4. The shielded vehicle-mounted self-temperature measuring cable according to claim 1, characterized in that: The metal braided layer is woven from 8 φ0.08mm tinned copper wires, and the braiding density is greater than 90%.

5. The shielded vehicle-mounted self-temperature measuring cable according to claim 1, characterized in that: The outer sheath is made of TPS material.

6. The shielded vehicle-mounted self-temperature measuring cable according to claim 1, characterized in that: The tensile rope is made of PP material, and the diameter of the tensile rope is similar to the outer diameter of the nylon hose.

7. A terminal block for connecting the shielded vehicle-mounted self-temperature measuring cable according to any one of claims 1 to 6, characterized in that: include: An outer sleeve and an inner cone sleeve are made of metal, and a connected straight hole and a cone hole are arranged in the outer sleeve. The inner cone sleeve is inserted into the cone hole of the outer sleeve, and a stepped through hole is arranged in the inner cone sleeve for passing the self-temperature measuring insulating core wire in the shielded vehicle-mounted self-temperature measuring cable. A compression sleeve is threadedly connected on the outer wall of the outer sleeve, and the compression sleeve rests on the inner cone sleeve.

8. The connection terminal according to claim 7, characterized in that: An annular step groove is arranged on the external sleeve, and a metal clamp is arranged on the annular step groove.

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