Soft connection copper foil conductive strip formed by multi-layer riveting

Abstract

The utility model relates to the soft connection copper foil conductive band of multilayer riveting pressure constitution in the field of conductive band, including the copper connection band formed by the stack of several copper foil sheets, the bolt connection department and the welding part of copper connection band are formed respectively at both ends, the flexible bending part between bolt connection department and welding part, there is the movable clearance of relatively moving between every copper foil sheet and adjacent copper foil sheet in flexible bending part, the surface of bolt connection department is provided with copper band joint, the inner wall of copper band joint is clamped and is pasted the upper end and lower end of bolt connection department respectively, copper band joint and bolt connection department all are provided with the bolt hole of alignment, the screw bush is connected in the bolt hole, the both ends of screw bush are provided with riveting part and copper band joint riveting, the bolt connection department is synchronously clamped in the upper and lower end surface of copper band joint, and the radial locking is carried out with screw bush riveting part, makes the compression force evenly transmit to every layer copper foil, and the screw bush is embedded in the bolt hole and is two -way riveting, forms the mechanical interlock structure, and prevents the thread loosening failure.

Description

Technical Field

[0001] This utility model relates to the field of conductive strips, and in particular to flexible copper foil conductive strips composed of multiple riveted layers. Background Technology

[0002] Flexible copper foil conductive strips are key conductive components in power equipment, new energy battery systems, and high-current transmission fields. Their core function is to achieve low-resistance, highly flexible current conduction between the fixed and moving ends. These components must simultaneously meet the dual requirements of mechanical bending life and electrical stability, especially maintaining long-term stability of contact resistance under dynamic conditions such as vibration and thermal cycling.

[0003] Traditional conductive strips often use integral welded ends. When the bolts are tightened, the pressure distribution is uneven, local deformation is aggravated and the contact resistance increases. The bolt holes are directly tapped into the copper foil pressing part, and the threads are prone to deformation and loosening. Utility Model Content

[0004] To overcome the shortcomings of existing technical solutions, this utility model provides a flexible copper foil conductive strip composed of multiple riveted layers, which can effectively solve the technical problems of stress concentration and thread failure.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The flexible copper foil conductive strip with multi-layer riveting includes a copper connecting strip formed by stacking several copper foil sheets. The two ends of the stacked copper foil sheets are pressed together by a hydraulic press to make the stacked copper foil sheets fit tightly together. The two ends of the pressing together form the bolt connection part and the welded part of the copper connecting strip, respectively. There is a flexible bending part between the bolt connection part and the welded part. In the flexible bending part, there is a movable gap between each copper foil sheet and the adjacent copper foil sheet. The surface of the bolt connection part is provided with a copper strip joint. The inner wall of the copper strip joint clamps and fits the upper end and the lower end of the bolt connection part. Both the copper strip joint and the bolt connection part are provided with aligned bolt holes. A threaded sleeve is connected in the bolt hole. The two ends of the threaded sleeve are provided with riveting parts to be riveted to the copper strip joint.

[0007] Furthermore, the copper strip joint is composed of an upper fixing plate and a lower fixing plate. The upper fixing plate, the lower fixing plate and the bolt connection part have the same shape, and the opposite side of the upper fixing plate and the lower fixing plate is in contact with the end face of the bolt connection part.

[0008] Furthermore, the side wall of the bolt connection is provided with a positioning notch, and the edges of the upper fixing plate and the lower fixing plate are connected by a connecting side plate. The upper fixing plate, the lower fixing plate and the connecting side plate are integrally formed by bending and stamping, and the connecting side plate and the positioning notch cooperate with each other.

[0009] Furthermore, the surface of the bolt connection and the inner wall of the copper strip joint are provided with mutually cooperating positioning protrusions and positioning recesses.

[0010] Furthermore, the copper foil is provided with positioning protrusions and positioning recesses on both sides, and the stacked copper foils are aligned with each other through the positioning protrusions and positioning recesses.

[0011] Furthermore, the outer side of the flexible curved portion is wrapped with a silicone protective sleeve.

[0012] Furthermore, positioning grooves are pressed out on the surfaces of the bolt connection and the weld, and the two ends of the silicone protective sleeve extend to the bolt connection and the weld, and the inner wall of the sleeve is provided with positioning protrusions that engage with the positioning grooves.

[0013] Furthermore, the surface of the welded portion is covered with a solder layer.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by clamping the bolt connection part on the inner wall of the copper strip joint, the high-temperature deterioration of copper foil grains is avoided, and the bending resistance of the end is improved. The upper and lower end faces of the copper strip joint clamp the bolt connection part simultaneously, and the radial locking is achieved with the screw sleeve riveting part, so that the pressing force is evenly transmitted to each layer of copper foil, reducing contact resistance fluctuation. The screw sleeve is embedded in the bolt hole and riveted in both directions to form a mechanical interlocking structure, which prevents thread loosening failure. It is suitable for high-frequency vibration scenarios. When using bolt locking, the force is applied to the screw sleeve, avoiding the fact that the locking is only concentrated on the edge of the bolt hole in the traditional structure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 3 This is a top view of the copper connecting strip in this utility model;

[0018] Figure 4 This is a top view of the copper foil sheet in this utility model;

[0019] The numbers in the diagram are: 1-copper connecting strip, 101-bolt connection, 102-welding part, 103-flexible bending part, 2-copper foil sheet, 3-copper strip joint, 301-upper fixing plate, 302-lower fixing plate, 303-connecting side plate, 4-bolt hole, 5-positioning notch, 6-silicone protective sleeve, 601-positioning protrusion, 7-screw sleeve, 701-riveting part. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The following is combined Figures 1-4 The present invention provides a detailed description of the flexible copper foil conductive strip constructed by multi-layer riveting:

[0022] The flexible copper foil conductive strip with multiple layers of riveting includes a copper connecting strip 1 formed by stacking several copper foil sheets 2. The two ends of the stacked copper foil sheets 2 are pressed together by a hydraulic press to make the stacked copper foil sheets 2 fit tightly together. The two ends of the pressing form a bolt connection part 101 and a welding part 102 of the copper connecting strip 1, respectively. There is a flexible bending part 103 between the bolt connection part 101 and the welding part 102. There is a movable gap between each copper foil sheet 2 and the adjacent copper foil sheet 2 in the flexible bending part 103. The surface of the bolt connection part 101 is provided with a copper strip joint 3. The inner wall of the copper strip joint 3 clamps and fits the upper end and the lower end of the bolt connection part 101, respectively. Both the copper strip joint 3 and the bolt connection part 101 are provided with aligned bolt holes 4. A threaded sleeve 7 is connected in the bolt hole 4. The two ends of the threaded sleeve 7 are provided with riveting parts 701 to rivet with the copper strip joint 3.

[0023] The bolt connection part 101 is clamped on the inner wall of the copper strip connector 3 to prevent the copper foil grains from deteriorating at high temperature and improve the end bending resistance. The upper and lower end faces of the copper strip connector 3 clamp the bolt connection part 101 simultaneously and are radially locked with the riveting part of the screw sleeve 7, so that the pressing force is evenly transmitted to each layer of copper foil, reducing contact resistance fluctuation. The screw sleeve 7 is embedded in the bolt hole 4 and riveted in both directions to form a mechanical interlocking structure, which prevents the thread from loosening and failure, and is suitable for high-frequency vibration scenarios.

[0024] The copper strip joint 3 is composed of an upper fixing plate 301 and a lower fixing plate 302. The upper fixing plate 301, the lower fixing plate 302 and the bolt connection part 101 have the same shape. The opposite sides of the upper fixing plate 301 and the lower fixing plate 302 are in contact with the end face of the bolt connection part 101. The side wall of the bolt connection part 101 is provided with a positioning notch 5. The edges of the upper fixing plate 301 and the lower fixing plate 302 are connected by a connecting side plate 303. The upper fixing plate 301, the lower fixing plate 302 and the connecting side plate 303 are integrally formed by bending and stamping. The connecting side plate 303 and the positioning notch 5 cooperate with each other. Through the three-sided surrounding structure formed by the upper fixing plate 301, the lower fixing plate 302 and the connecting side plate 303, the clamping force is evenly distributed on the surface of the bolt connection part 101, completely eliminating single-point stress concentration. The positioning notch 5 and the side plate are mechanically interlocked to prevent the joint from shifting laterally during vibration.

[0025] The bolt connection 101 surface and the inner wall of the copper strip joint 3 are provided with mutually cooperating positioning protrusions and positioning recesses, forming a mechanical self-locking effect between the bolt connection 101 and the joint, suppressing the slippage of the contact surface caused by high-frequency micro-vibration. The copper foil 2 is provided with positioning protrusions and positioning recesses on both sides. The copper foil 2 stacked on top of each other is aligned by the positioning protrusions and positioning recesses. The positioning protrusions and positioning recesses of each layer of copper foil engage to avoid stacking misalignment.

[0026] The flexible bending portion 103 is wrapped with a silicone protective sleeve 6, which isolates dust and moisture and improves the salt spray resistance. Positioning grooves are pressed into the surfaces of the bolt connection portion 101 and the welding portion 102. The silicone protective sleeve 6 extends to both ends of the bolt connection portion 101 and the welding portion 102, and its inner wall is provided with positioning protrusions 601 that engage with the positioning grooves, improving the resistance to axial peeling and eliminating the risk of electric arc caused by the protective sleeve loosening.

[0027] The surface of the welded part 102 is covered with a tin solder layer, which reduces the surface resistivity and improves the oxidation resistance of the welded part 102.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flexible copper foil conductive strip formed by multi-layer riveting, comprising a copper connecting strip formed by stacking several copper foil sheets, characterized in that: The stacked copper foil sheets are pressed together at both ends by a hydraulic press to ensure a tight fit between the stacked copper foil sheets. The pressed ends form the bolt connection part and the welded part of the copper connecting strip, respectively. There is a flexible bending part between the bolt connection part and the welded part. In the flexible bending part, there is a movable gap between each copper foil sheet and the adjacent copper foil sheet. The surface of the bolt connection part is provided with a copper strip joint. The inner wall of the copper strip joint clamps and fits the upper and lower ends of the bolt connection part. Both the copper strip joint and the bolt connection part are provided with aligned bolt holes. A threaded sleeve is connected in the bolt hole. The two ends of the threaded sleeve are provided with riveting parts to be riveted to the copper strip joint.

2. The flexible copper foil conductive strip formed by multi-layer riveting according to claim 1, characterized in that: The copper strip joint consists of an upper fixing plate and a lower fixing plate. The upper fixing plate, the lower fixing plate and the bolt connection part have the same shape. The opposite side of the upper fixing plate and the lower fixing plate is in contact with the end face of the bolt connection part.

3. The flexible copper foil conductive strip formed by multi-layer riveting according to claim 2, characterized in that: The side wall of the bolt connection is provided with a positioning notch. The edges of the upper fixing plate and the lower fixing plate are connected by a connecting side plate. The upper fixing plate, the lower fixing plate and the connecting side plate are integrally formed by bending and stamping. The connecting side plate and the positioning notch cooperate with each other.

4. The flexible copper foil conductive strip formed by multi-layer riveting according to any one of claims 1-3, characterized in that: The bolted connection surface and the inner wall of the copper strip joint are provided with mutually cooperating positioning protrusions and positioning recesses.

5. The flexible copper foil conductive strip formed by multi-layer riveting according to any one of claims 1-3, characterized in that: The copper foil has positioning protrusions and positioning recesses on both sides, and the stacked copper foils are aligned with each other through the positioning protrusions and positioning recesses.

6. The flexible copper foil conductive strip formed by multi-layer riveting according to any one of claims 1-3, characterized in that: The flexible bending section is wrapped with a silicone protective sleeve on its outer side.

7. The flexible copper foil conductive strip formed by multi-layer riveting according to claim 6, characterized in that: The surfaces of the bolted connection and the welded part are pressed with positioning grooves, and the two ends of the silicone protective sleeve extend to the bolted connection and the welded part, and the inner wall of the sleeve is provided with positioning protrusions that engage with the positioning grooves.

8. The flexible copper foil conductive strip formed by multi-layer riveting according to any one of claims 1-3, characterized in that: The surface of the welded part is covered with a solder layer.

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