CN217933210U

CN217933210U - Silica gel insulation new energy automobile shielding cable

Info

Publication number: CN217933210U
Application number: CN202221103663.2U
Authority: CN
Inventors: 韩再全; 程俊龙; 孙鹏飞; 王永久
Original assignee: Tianjin Fuxin Automobile Cable Co ltd
Current assignee: Tianjin Fuxin Automobile Cable Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-11-29
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses an insulating new energy automobile shielded cable of silica gel belongs to wire and cable and makes technical field, and insulating new energy automobile shielded cable of silica gel includes stranded conductor, silica gel insulating layer, braided shield, the restrictive coating that sets up from inside to outside, its characterized in that: and a graphite carbon black layer is arranged between the silica gel insulating layer and the braided shielding layer. The utility model discloses a graphite carbon black glue film has replaced around package plastic-aluminum composite tape layer, has increased the compliance, makes all cable parts match completely rather than operating temperature, and graphite carbon black glue film has semi-conductive characteristic, and semi-conductive layer does not have aluminium foil surface oxidation problem with shielded weaving or winding copper wire good contact.

Description

Silica gel insulation new energy automobile shielding cable

Technical Field

The utility model belongs to the technical field of wire and cable makes, especially, relate to an insulating new energy automobile shielded cable of silica gel

Background

In recent years, the technology of new energy automobiles in China is developed at a high speed, and energy automobiles are more and more favored by people along with the maturity of the technology of new energy automobiles. The wire and cable industry is the second largest industry in China after the automotive industry.

The new energy automobile shielded cable is one of cables, and at present, a charge-discharge cable of a new energy automobile mainly adopts a silicon rubber insulated shielded cable. The shielding structure of the shielded cable mainly has two types: one is a braided or wound copper wire (or tinned copper wire) shielding structure, and the cable with the shielding structure is suitable for automobiles with low signal shielding requirements; the other type is a shielding structure which is formed by weaving or winding a copper wire (or a tinned copper wire) and an aluminum-plastic composite film in a wrapping mode, and the cable with the shielding structure is mainly used for carrying vehicle systems such as novel variable frequency motors and the like which have strict requirements on shielding.

The first shielded cable using braided or wound copper wires as a shielding structure mainly has the following advantages and disadvantages: 1. the flexibility is good; 2. the cable is beautiful; 3. the bending radius is small; 4. the shielding effect is greatly influenced by the weaving density, and particularly the shielding effect of the cable is seriously reduced under the condition that the weaving gaps are not uniform; 5. because there is the gap between the copper wire, the cable is poor to high frequency signal shielding.

The shielding cable with the braided or wound copper wire and wrapped aluminum-plastic composite tape as the shielding structure mainly has the following advantages and disadvantages: 1. the shielding effect is good, and the aluminum-plastic composite belt covers the surface of the cable and conducts the induced signals out in time through the copper wires. 2. Because the aluminum-plastic composite tape is wrapped, the cable is hard and has large bending radius; 3. the aluminum layer of the aluminum-plastic composite belt is easy to oxidize, so that the aluminum layer is not in good contact with the braided wire, and the shielding effect is poorer and poorer along with the passage of time compared with that of a newly produced aluminum-plastic composite belt; 4. the working temperature of the aluminum-plastic composite belt is generally about 125 ℃, the working temperature is not matched with 180-200 ℃ of silicon rubber, and if the aluminum-plastic composite belt is applied for a period of time, the plastic belt can be broken due to aging, so that the shielding effect is influenced.

A low noise cable is another form of cable,

the low-noise cable is mainly manufactured by adopting an insulation coating graphite carbon black material to realize an insulation effect. However, untreated graphite carbon black has poor adhesion to insulation, and falls off after a period of use, thereby affecting shielding and noise reduction effects and long-term use of the cable.

In view of the foregoing, there is a need for a shielded electrical cable for a vehicle that integrates the advantages of various shielded electrical cables.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a solve the problem of the short board of obvious defect separately all exists in the shielded cable that present new energy automobile used's silica gel insulation new energy automobile shielded cable.

The utility model discloses a realize like this, a silica gel insulation new energy automobile shielded cable, include stranded conductor, silica gel insulating layer, woven shield, the restrictive coating that sets up from inside to outside, its characterized in that: and a graphite carbon black layer is arranged between the silica gel insulating layer and the braided shielding layer.

The utility model provides a novel shielded cable's advantage and effect are:

the utility model discloses a graphite carbon black glue film has replaced around package plastic-aluminum composite strip layer, has increased the compliance, makes all cable parts match rather than operating temperature completely, and graphite carbon black glue film has semi-conductive characteristic, and semi-conductive layer does not have the surface oxidation problem with shielded weaving or winding copper wire good contact.

In the above technical solution, preferably, the braided shielding layer is a copper wire braid layer.

In the above technical solution, preferably, the graphite carbon black layer is bonded to the outer surface of the silica gel insulating layer through a liquid organosilicon curing film and forms a graphite carbon black glue layer. The liquid organosilicon cured film is used as a semi-conductive structure carrier, so that the semi-conductive structure carrier is easy to strip from insulation, and a semi-conductive layer is not easy to break.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is the utility model discloses a silica gel insulation new energy automobile shielded cable manufacturing process schematic diagram.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

For solving the problem that the shielded cable that present new energy automobile used all has obvious defect short slab separately, the utility model particularly provides an insulating new energy automobile shielded cable of silica gel, this insulating new energy automobile shielded cable of silica gel shields effectually, the compliance is good, bending radius is little and oxidation resistance is good. For further explanation of the structure of the present invention, the following detailed description is made with reference to the accompanying drawings:

referring to fig. 1, a silica gel insulation new energy automobile shielded cable includes a stranded conductor 1, a silica gel insulation layer 2, a graphite carbon black layer 5, a braided shielding layer 3 and a sheath layer 4 which are arranged from inside to outside.

Wherein the braided shielding layer is a copper wire braided layer or a copper wire winding layer. The graphite carbon black layer is combined on the outer surface of the silica gel insulating layer through a liquid organic silicon curing film to form a graphite carbon black glue layer. The graphite carbon black layer and the liquid organic silicon are vulcanized and adhered together to form a continuous and complete graphite carbon black glue layer, so that the conductive shielding effect of the graphite carbon black is achieved, and the flexibility and the continuity of the organic silicon film are considered. Meanwhile, when the terminal is processed in the subsequent process of the cable, only the solidified liquid organic silicon film and the attached graphite carbon black are needed to be stripped, and the insulating crimping terminal process is not affected. The shielding cable has the advantages of good shielding effect, good flexibility, small bending radius, good oxidation resistance and the like of the cables with different shielding structures.

The utility model provides an insulating new energy automobile shielded cable of silica gel's manufacturing method is:

firstly, preparing graphite carbon black mixed powder serving as a standby material, wherein the graphite carbon black mixed powder comprises the following raw materials in percentage by mass:

30-35 parts of semiconductive carbon black;

65-70 parts of graphite;

1.5-2.5 parts of a coupling agent;

0.5-1.5 parts of an adhesion promoter;

0.01-0.5 part of carbon nano tube.

The preparation method comprises the following steps:

s1, putting the semi-conductive carbon black and graphite into a high-speed kneader, and stirring the semi-conductive carbon black and the carbon black for 1-2 minutes.

And S2, adding an adhesion auxiliary agent to enable the graphite and the carbon black to be condensed into larger particles, and controlling the stirring time for 4-5 minutes.

And S3, spraying the carbon nano tube, and stirring for 2-3 minutes. A small amount of semiconductor material formed by carbon nano tubes is added into the graphite and carbon black mixed powder to improve the conductivity.

And S4, adding a coupling agent, and controlling the stirring time to be 8-10 minutes to obtain graphite and carbon black mixed powder, wherein a layer of coupling agent film is formed on the particle surface of the graphite and carbon black mixed powder. Putting into a moisture-proof and sealed container for later use.

Cabling comprises the following steps, see fig. 2:

the method comprises the following steps: and (4) preparing a stranded conductor. The stranded conductor is made by a wire stranding machine.

Step two: the method for manufacturing the bonding layer of the silica gel insulating layer and the graphite carbon black glue layer on the outer side of the stranded conductor comprises the following steps of:

1) And coating a silicon rubber insulating material on the outer layer of the stranded conductor, and curing the outer layer of the silicon rubber insulating material to prepare the silicon rubber insulating layer arranged on the outer side of the stranded conductor. Namely, the twisted conductor is manufactured by a winding machine and is drawn out, and then the twisted conductor passes through a silicon rubber extrusion machine head 6, and the outer surface of the twisted conductor is coated with a layer of silicon rubber insulating material. The outer layer of the stranded conductor coated with the silicone rubber insulating material is quickly vulcanized by the infrared heating box 7, so that the silicone rubber insulating material forms a silicone rubber insulating layer with certain strength.

2) And carrying out plasma surface treatment on the outer surface of the silica gel insulating layer. Two to three plasma surface treatment devices are arranged at the position 150mm in front of the silicon rubber extruder head, and the silica gel insulating layer is subjected to continuous surface treatment to increase the adhesive force of the surface of the silica gel insulating layer and reduce the gap between the silica gel insulating layer and a subsequently cured silicone film. In this embodiment, the plasma surface treatment device is a plasma blowing head 8 disposed above and below the wire body.

3) And coating liquid organic silicon on the outer surface of the silica gel insulating layer to prepare the organic silicon film. Specifically, the wire body processed by the previous step is immersed into a box body 9 containing liquid organic silicon, the liquid organic silicon is coated outside the silica gel insulating layer, the liquid organic silicon is rapidly cured due to the contact with the silica gel insulating layer through the high-temperature insulation of infrared radiation in the previous step, a continuous organic silicon film inner layer is formed, and the organic silicon film outer layer is still liquid.

4) The graphite carbon black mixed powder is coated on the outer layer of the organic silicon film. The wire body processed in the previous step enters the powder box 10, and graphite carbon black is coated on the outer layer of the organic silicon film and attached to the outer layer of the organic silicon film.

5) And curing the organic silicon film. And (3) the wire body treated in the last step enters a hot air oven 11, the organic silicon film is continuously cured, and meanwhile, the wire body penetrates into the vulcanized silicone rubber for insulation, and a graphite carbon black adhesive layer combined with the silica gel insulating layer is formed in the step.

Step three: and weaving or winding copper wires on the outer side of the graphite carbon black adhesive layer to prepare the woven shielding layer. Weaving or winding copper wires (tinned copper wires), and further increasing the adhesion of the graphite carbon black layer and the liquid organic silicon film through the pressure applied by weaving the copper wires.

Step four: and coating vulcanized silicone rubber outside the braided shielding layer to prepare the sheath layer. And manufacturing the sheath layer by using a vacuum extruder so that the sheath material can be better attached with the graphite carbon black exposed from the weaving gaps. Meanwhile, in the aspect of process control, 5-10% of the vulcanization time of the sheath is increased so as to increase the adhesive force of the sheath and the graphite carbon black.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an insulating new energy automobile shielded cable of silica gel, includes stranded conductor, silica gel insulating layer, braided shield, restrictive coating that from inside to outside set up, its characterized in that: a graphite carbon black adhesive layer is arranged between the silica gel insulating layer and the braided shielding layer;

the braided shielding layer is a tinned copper wire braided layer;

the graphite carbon black glue layer is a liquid organic silicon curing film adhered with a graphite carbon black material, and the liquid organic silicon curing film is coated on the outer layer of the organic silicon film.