Shielding connection assembly, cable assembly and method for preparing cable assembly

1 . A shielding connection assembly for connecting a first shielding layer and a second shielding layer, wherein the shielding connection assembly comprises:

a conductive device having a first end connected to the first shielding layer and a second end connected to the second shielding layer;

a first shielding internal device disposed on an inner side of the first shielding layer;

a first shielding external device disposed on an outer side of the first end, wherein the first end of the conductive device and the first shielding layer are pressed or welded or abutted between the first shielding internal device and the first shielding external device;

a second shielding internal device disposed on an inner side of the second shielding layer; and

a second shielding external device disposed on an outer side of the second end, wherein the second end of the conductive device and the second shielding layer are pressed or welded or abutted between the second shielding internal device and the second shielding external device, wherein:

the first shielding internal device is disposed separately from the first shielding external device;

an outer wall of the first shielding internal device is attached to an inner wall of the first shielding layer;

the second shielding internal device is disposed separately from the second shielding external device;

an outer wall of the second shielding internal device is attached to an inner wall of the second shielding layer;

a structural strength of the first shielding internal device is greater than that of the first shielding external device;

an inner wall of the conductive device is provided with an inner insulation layer, and the inner insulation layer is spaced apart from components located on an inner side of the conductive device;

the first end and the second end of the conductive device are not provided with the inner insulation layer, and

wherein the inner insulation layer is spaced apart from components on the inner side of the conductive device comprises: an annular space is provided on the inner side of the inner insulation layer, to separates the inner insulation layer from any of the components located on the inner side of the inner insulation layer.

2 . The shielding connection assembly according to claim 1 , wherein a connection position between the first end of the conductive device and the first shielding layer is in a symmetrical connection arrangement or a 360° connection arrangement, and wherein a connection position between the second end of the conductive device and the second shielding layer is in a symmetrical connection arrangement or a 360° connection arrangement.

3 . The shielding connection assembly according to claim 1 , wherein an outer wall of the conductive device is provided with an outer insulation layer, and wherein the first end and the second end of the conductive device are not provided with the outer insulation layer.

4 . A cable assembly, comprising a first cable and a second cable, wherein:

the first cable comprises a first cable core and a first shielding layer, a first protective layer is wrapped around an outer side of the first cable, and the first shielding layer is disposed on an outer side of the first protective layer;

the second cable comprises a second cable core and a second shielding layer, a second protective layer is wrapped around an outer side of the second cable core, and the second shielding layer is disposed on an outer side of the second protective layer;

a first end of the first cable core is connected to a first end of the second cable core; and

the cable assembly further comprises the shielding connection assembly according to claim 1 .

5 . The cable assembly according to claim 4 , wherein the first cable core is lapped or butted with the second cable core.

6 . The cable assembly according to claim 5 , wherein a minimum cross-sectional area of a lapped or butted position is greater than or equal to a smallest one of a cross-sectional area of the first cable core and a cross-sectional area of the second cable core.

7 . The cable assembly according to claim 4 , wherein a thickness of the first shielding layer, or the second shielding layer or the conductive device is between 0.003 mm and 27 mm.

8 . The cable assembly according to claim 4 , wherein an outer surface area of connection between the first shielding internal device and the first shielding layer is greater than 1.3% of an outer surface area of the first shielding internal device, and wherein an outer surface area of connection between the second shielding internal device and the second shielding layer is greater than 1.3% of an outer surface area of the second shielding internal device.

9 . The cable assembly according to claim 4 , wherein an outer surface area of connection between the first shielding external device and the first shielding layer is greater than 1.4% of an outer surface area of the first shielding external device, and wherein an outer surface area of connection between the second shielding external device and the second shielding layer is greater than 1.4% of an outer surface area of the second shielding external device.

10 . The cable assembly according to claim 4 , wherein a minimum cross-sectional area of a connection position between the first end of the conductive device and the first shielding layer is 60% to 260% of a cross-sectional area of the first shielding layer, and wherein a minimum cross-sectional area of a connection position between the second end of the conductive device and the second shielding layer is 60% to 260% of a cross-sectional area of the second shielding layer.

11 . The cable assembly according to claim 4 , wherein an impedance of a connection position between the first end of the conductive device and the first shielding layer is less than 13.7 mΩ, and an impedance of a connection position between the second end of the conductive device and the second shielding layer is less than 13.7 mΩ.

12 . The cable assembly according to claim 4 , further comprising an isolation device, wherein the isolation device is disposed on an outer side of the first end of the first cable core and on an outer side of the first end of the second cable core.

13 . The cable assembly according to claim 12 , wherein one end of the isolation device is connected to the first protective layer, and the other end of the isolation device is connected to the second protective layer.

14 . The cable assembly according to claim 4 , wherein the first cable further comprises a third protective layer and the second cable further comprises a fourth protective layer, wherein the third protective layer is disposed on an outer side of the first shielding layer, and wherein the fourth protective layer is disposed on an outer side of the second shielding layer.

15 . The cable assembly according to claim 14 , wherein:

when an outer insulation layer is provided on an outer wall of the conductive device, the cable assembly further comprises a first sealing member and a second sealing member;

the first sealing element is capable of hermetically connecting the third protective layer and the outer insulation layer; and

the second sealing element is capable of hermetically connecting the fourth protective layer and the outer insulation layer.

16 . A method for preparing a cable assembly, comprising:

providing a first cable, which comprises a first cable core, a first protective layer and a first shielding layer, wherein the first protective layer is disposed on an outer side of the first cable core, and the first shielding layer is disposed on an outer side of the first protective layer;

peeling off the first shielding layer and the first protective layer at a first end of the first cable to expose the first cable core;

providing a second cable, which comprises a second cable core, a second protective layer and a second shielding layer, wherein the second protective layer is disposed on an outer side of the second cable core, and the second shielding layer is disposed on an outer side of the second protective layer;

peeling off the second shielding layer and the second protective layer at a first end of the second cable to expose the second cable core;

connecting a first end of the first cable core and a first end of the second cable core;

providing a shielding connection assembly, wherein the shielding connection assembly comprises a conductive device, a first shielding internal device, a first shielding external device disposed separately from the first shielding internal device, a second shielding internal device and a second shielding external device disposed separately from the second shielding internal device, wherein a structural strength of the first shielding internal device is greater than that of the first shielding external device;

disposing the first shielding internal device on an inner side of the first shielding layer so that an outer wall of the first shielding internal device is attached to an inner wall of the first shielding layer;

disposing the second shielding internal device on an inner side of the second shielding layer so that an outer wall of the second shielding internal device is attached to an inner wall of the second shielding layer;

disposing a first end of the conductive device on an outer side of the first shielding layer, and disposing a second end of the conductive device on an outer side of the second shielding layer;

disposing the first shielding external device on an outer side of the first end of the conductive device;

disposing the second shielding external device on an outer side of the second end of the conductive device;

welding the first end of the conductive device and the first shielding layer between the first shielding internal device and the first shielding external device, and welding the second end of the conductive device and the second shielding layer between the second shielding internal device and the second shielding external device; or, crimping the first end of the conductive device and the first shielding layer between the first shielding internal device and the first shielding external device, and crimping the second end of the conductive device and the second shielding layer between the second shielding internal device and the second shielding external device; or, abutting the first end of the conductive device and the first shielding layer between the first shielding internal device and the first shielding external device, and abutting the second end of the conductive device and the second shielding layer between the second shielding internal device and the second shielding external device; and

providing an inner insulation layer on an inner wall of the conductive device, and not providing the inner insulation layer on the first end and the second end of the conductive device, wherein the inner insulation layer is spaced apart from components located on the inner side of the conductive device, to form an annular space on the inner side of the inner insulation layer that separates the inner insulation layer from any of the components located on the inner side of the inner insulation layer.

17 . The method according to claim 16 , wherein before the step of disposing an end of the conductive device on the outer side of the first shielding layer and disposing the other end of the conductive device on the outer side of the second shielding layer, the method further comprises disposing an isolation device on an outer side of a connection position between the first cable core and the second cable core.