A copper soft connection structure

Abstract

The application relates to a copper flexible connection structure and belongs to the technical field of copper flexible connection, which comprises a copper flexible base and connecting blocks arranged at two ends of the copper flexible base, the copper flexible base is composed of multiple copper foils which are arranged in a laminated mode, flexible layers are arranged between the adjacent copper foils, and an annular outer shielding layer is arranged on the outer surface of the copper flexible base; one end of the connecting block opposite to the copper flexible base is provided with a connecting groove for plug-in installation of the copper flexible base, and the connecting block is provided with locking pieces for locking the copper flexible base. The flexible layers arranged between the adjacent copper foils serve as buffer media, effectively disperse local stress generated between the adjacent copper foil layers when the copper foils are frequently bent or vibrated, and significantly reduce stress concentration.

Description

Technical Field

[0001] This utility model relates to the field of copper flexible connection technology, and in particular to a copper flexible connection structure. Background Technology

[0002] Existing technologies, such as the copper flexible connector disclosed in Chinese utility model patent CN211480174U, employ a structure that connects the mounting blocks at both ends using multiple layers of stacked copper foil (copper flexible strip). However, in this structure, adjacent copper foil layers are directly overlapped, lacking effective stress buffering. Under frequent bending or vibration conditions (such as in the power system of new energy vehicles), the copper foil layers are prone to stress concentration, leading to metal fatigue, fracture failure, and affecting connection reliability. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a copper flexible connection structure.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a copper flexible connection structure, including a copper flexible substrate and connecting blocks disposed at both ends of the copper flexible substrate. The copper flexible substrate is composed of multiple layers of copper foil, with a flexible layer between adjacent copper foils. An outer shielding layer is wrapped around the outer surface of the copper flexible substrate. A connecting groove for inserting and installing the copper flexible substrate is provided at one end of the connecting block opposite to the copper flexible substrate, and a locking element for locking the copper flexible substrate is provided on the connecting block.

[0005] Furthermore, it also includes an inner shielding layer located between the outer shielding layer and the copper soft substrate, with the inner shielding layer disposed on both sides of the copper soft substrate in the thickness direction.

[0006] Furthermore, the locking element is a locking screw.

[0007] Furthermore, multiple grooves are provided on opposite sides of the two connecting blocks, and the multiple grooves are spaced apart along the thickness direction of the connecting blocks. A heat dissipation part is provided in the groove, and the heat dissipation part is a heat sink.

[0008] Furthermore, the flexible layer is made of silicone rubber, which has good flexibility and insulation properties, and buffers friction and vibration between copper foils.

[0009] Furthermore, the outer shielding layer of the ring is made of an iron-nickel alloy material.

[0010] Furthermore, the outer shielding layer of the ring is made of conductive cloth and aluminum foil.

[0011] Furthermore, the inner shielding layer is made of conductive cloth or aluminum foil.

[0012] The beneficial effects of this application are as follows: 1. A flexible layer is provided between adjacent copper foils in this application. The flexible layer acts as a buffer medium, effectively dispersing the local stress generated between adjacent copper foil layers during frequent bending or vibration, and significantly reducing stress concentration. This fundamentally inhibits the initiation and propagation of metal fatigue cracks, greatly reducing the risk of copper foil fracture due to fatigue, thereby significantly improving the long-term connection reliability and service life of copper flexible connections under dynamic working conditions.

[0013] 2. The interlocking groove and locking mechanism provide a reliable and adjustable mechanical fixing method. Compared with traditional welding, this structure avoids the risk of material embrittlement caused by the heat-affected zone of welding, while reducing stress concentration at the root (fixed end) of the copper soft substrate. This further improves the overall structure's stability and fatigue resistance under vibration, and enhances connection reliability.

[0014] 3. The inner and outer shielding layers together form a dual electromagnetic shielding structure. This structure effectively suppresses the leakage of electromagnetic interference generated inside the copper flexible connector, while blocking the intrusion of external electromagnetic interference, significantly improving the electromagnetic shielding performance of the entire connector. This meets the needs of applications requiring high reliability and high electromagnetic compatibility, such as new energy vehicles and precision electronic equipment.

[0015] 4. By setting heat sinks, the heat dissipation area can be increased, allowing the heat generated by the connecting block and copper soft substrate to be dissipated quickly during use, ensuring the overall stability during use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the connecting groove of this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the copper soft substrate of this utility model.

[0019] The diagram shows the following markings: 1. Copper soft substrate, 11. Copper foil, 2. Connecting block, 21. Connecting groove, 3. Locking component, 4. Heat dissipation part, 5. Flexible layer, 6. Inner shielding layer, 7. Ring-enclosed outer shielding layer. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Please see Figure 1-3 This utility model provides a copper flexible connection structure, including a copper flexible substrate 1 and connecting blocks 2 disposed at both ends of the copper flexible substrate 1. The copper flexible substrate 1 is composed of multiple stacked copper foils 11, with a flexible layer 5 between adjacent copper foils 11. An outer shielding layer 7 is wrapped around the outer surface of the copper flexible substrate 1. A connecting groove 21 for inserting and installing the copper flexible substrate 1 is provided on one end of the connecting block 2 opposite to the copper flexible substrate 1. A locking member 3 for locking the copper flexible substrate 1 is provided on the connecting block 2.

[0022] The copper foil 11 is made of 0.5mm thick purple copper foil. It also includes an inner shielding layer 6 located between the outer shielding layer 7 and the copper substrate 1, with the inner shielding layer 6 positioned on both sides of the copper substrate 1 in the thickness direction. The locking component 3 is a locking screw. The locking screw is an M6 screw, and the connecting block has threaded holes that mate with the locking screw.

[0023] The copper soft substrate 1 is reliably fixed by a threaded connection. The outer shielding layer 7 has a thickness of 0.2 mm, and the inner shielding layer 6 has a thickness of 0.1 mm.

[0024] Specifically, each of the two connecting blocks 2 has three grooves on its opposite side. These three grooves are spaced apart along the thickness direction of the connecting block 2, and each groove contains a heat dissipation section 4. The heat dissipation section 4 is a heat sink, made of aluminum alloy fins. The connecting block 2 is a forged copper part. The connecting groove 21 has anti-slip textures.

[0025] The flexible layer 5 is made of silicone rubber and is a 0.1mm thin sheet of silicone rubber. It possesses good flexibility and insulation, buffering friction and vibration between the copper foils 11. The outer shielding layer 7 is made of an iron-nickel alloy. It should be noted that any parts not detailed in this application are prior art.

[0026] Furthermore, the inner shielding layer 6 is made of conductive cloth or aluminum foil. Together with the outer shielding layer 7, it forms a double shielding structure, enhancing electromagnetic shielding performance.

[0027] Of course, this utility model is not limited to the embodiments described above. Several other embodiments based on the design concept of this utility model are also provided below.

[0028] For example, in other embodiments, unlike the embodiments described above, the outer shielding layer 7 is made of conductive cloth or aluminum foil.

[0029] The copper flexible substrate 1 is composed of three layers of copper foil 11, each 0.5 mm thick, for a total thickness of 1.5 mm. Alternatively, it can be composed of ten layers of copper foil 11, each 0.1 mm thick, for a total thickness of 1 mm. A 0.1 mm thick flexible silicone rubber layer is uniformly coated between adjacent copper foils, and the composite substrate with flexibility is formed through a hot-pressing process. The surface of the copper foil 11 is treated with an anti-oxidation treatment to improve corrosion resistance. The flexible silicone rubber layer is made by calendering silicone rubber material into a thin film with a thickness of 0.1 mm.

[0030] Inner shielding layer 6 bonding: The inner shielding layer 6 is made of 0.1mm thick conductive cloth, and the conductive cloth is bonded to both sides in the thickness direction of the composite substrate.

[0031] Outer shielding layer 7: The outer shielding layer 7 is made of 0.2mm thick iron-nickel alloy strip, which is wrapped around the copper soft substrate in an overlapping manner. The joints are sealed with tin solder to form a complete shielding cavity.

[0032] In this application, a flexible layer 5 is provided between adjacent copper foils 11. The flexible layer 5 acts as a buffer medium, effectively dispersing the local stress generated between adjacent copper foils 11 during frequent bending or vibration, and significantly reducing stress concentration. This fundamentally inhibits the initiation and propagation of metal fatigue cracks, greatly reducing the risk of copper foil 11 fracture due to fatigue, thereby significantly improving the long-term connection reliability and service life of copper flexible connections under dynamic working conditions.

[0033] The inner shielding layer 6 and the outer shielding layer 7 together form a dual electromagnetic shielding structure. This structure effectively suppresses the leakage of electromagnetic interference generated inside the copper flexible connector, while blocking the intrusion of external electromagnetic interference, significantly improving the electromagnetic shielding performance of the entire connector. This meets the needs of applications requiring high reliability and high electromagnetic compatibility, such as new energy vehicles and precision electronic equipment.

[0034] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

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