Adapter welding device of composite current collector

Abstract

The utility model discloses an adapter welding device of a composite current collector, which comprises a composite current collector unwinding roller for unwinding and feeding the composite current collector, a foil unwinding roller and a winding roller which are respectively arranged on two sides of the composite current collector unwinding roller, and a welding mechanism, the welding mechanism comprises an ultrasonic welding head and a welding bearing roller corresponding to the ultrasonic welding head in position, and a distance adjusting mechanism is arranged on the welding bearing roller to adjust the distance between the welding bearing roller and the ultrasonic welding head. The metal foil and the composite current collector are automatically welded, and the welding production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite current collectors, in particular to a transfer welding device for composite current collectors. Background Art

[0002] Batteries are widely used in consumer electronics and electric vehicles due to their advantages such as high energy density, long service life, green and pollution-free, and high safety performance. At the same time, people's demand for batteries is becoming increasingly strong. How to achieve high safety and high energy density of batteries has become the current research focus.

[0003] Because the composite current collector includes an insulating layer formed of a polymer material, the tabs of the composite current collector cannot output the current in the battery cell to the electrode terminals. This requires the use of a foil to connect the tabs of the composite current collector to transfer the current from the battery cell. In other words, the foil and the composite current collector are welded together. During the welding process, the metal foil is welded to the tabs on the composite current collector, thereby improving the current carrying capacity of the composite current collector and achieving circuit conduction.

[0004] Therefore, it is necessary to provide a composite current collector transfer welding device to solve the above problems. Utility Model Content

[0005] In order to overcome the above shortcomings, the purpose of the present invention is to provide a transfer welding device for a composite current collector, which can automatically weld the metal foil and the composite current collector to improve the welding production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a transfer welding device for a composite current collector, comprising a composite current collector unwinding roller for unwinding and loading the composite current collector, foil unwinding rollers and a take-up roller respectively provided on either side of the unwinding roller, and a welding mechanism; the welding mechanism comprises an ultrasonic welding head and a corresponding welding roller, the welding roller being provided with a distance adjustment mechanism to adjust the distance between the welding head and the ultrasonic welding head. The adjustable distance between the welding roller and the ultrasonic welding head makes the transfer welding device suitable for automatic welding of foils of different thicknesses to the composite current collector, effectively improving the applicability of the transfer welding device. If the welding mechanism is rolling welding, the corresponding ultrasonic welding head is a rolling welding head.

[0007] Furthermore, the welding mechanism further comprises a support bracket for supporting the soldering roller, wherein a support movable plate is provided on a side of the support bracket away from the soldering roller. The support bracket is provided on both sides of the composite current collector, thereby supporting the soldering roller from both ends.

[0008] Furthermore, the distance adjustment mechanism includes a distance adjustment bracket having a guide slot defined along its height. The end of the support plate, distal from the support bracket, extends horizontally through the guide slot and is capable of vertical movement within the guide slot. By allowing the support plate to move up and down within the guide slot, the distance between the support roller and the ultrasonic welding head can be adjusted to accommodate welding of foils of varying thicknesses to the composite current collector.

[0009] Furthermore, the invention further comprises a fixed plate and a rotating screw disposed at the bottom of the pitch-adjusting bracket. The rotating screw penetrates the fixed plate and is threadedly connected thereto. A connecting plate is disposed on the top of the rotating screw. The connecting plate is connected to the supporting movable plate via a connecting spring. A supporting roller in contact with the welding roller is disposed between the two oppositely disposed connecting plates. A rotating handle is disposed at one end of the rotating screw away from the connecting plate. The rotating screw is rotated by rotating the rotating handle. The rotating screw is connected to the connecting plate via a direct-thrust bearing. Under the auxiliary guidance of the guide groove, the connecting plate can only move up and down along the guide groove, thereby causing the welding roller to move toward or away from the ultrasonic welding head, thereby adjusting the distance between the welding roller and the ultrasonic welding head, thereby meeting the requirements for composite welding between foils of different thicknesses and composite current collectors.

[0010] Furthermore, multiple tensioning rollers are provided between the foil unwinding roller and the welding mechanism, between the composite current collector unwinding roller and the welding mechanism, and between the welding mechanism and the winding roller. This ensures that the welded composite foil does not bend or wrinkle, and that the weld mark is accurately positioned and not offset, thereby improving welding results and efficiency.

[0011] Furthermore, the system includes two symmetrically positioned traction conveyor rollers along the transported composite current collector, with a deviation correction mechanism positioned between the composite current collector unwinding roller and the foil unwinding roller. This ensures that the relative positions of the foil and composite current collector do not deviate before they enter the traction conveyor rollers, allowing them to overlap at a preset position after entering the traction conveyor rollers, avoiding positional errors during subsequent welding and ensuring welding efficiency.

[0012] Furthermore, the deflection correction mechanism includes two parallel deflection correction rollers, on which the foil and the composite current collector are sequentially wrapped. The deflection correction mechanism is driven by a motor, which cooperates with a sensor. The sensor can sense the position of the corresponding foil or composite current collector wrapped around the deflection correction roller. When the relative position of the foil and the composite current collector deviates, the rotating shaft of the motor drives the deflection correction roller to rotate, thereby causing the foil and the composite current collector to make a slight relative movement to correct the deflection of the foil and the composite current collector during the conveying process, so that the foil and the composite current collector entering the traction conveying roller can overlap at a preset position to meet the requirements of the overlapping size and welding position.

[0013] Beneficial effects of the utility model:

[0014] In the utility model, the foil unwinding roller, the composite current collector unwinding roller, the winding roller, the welding mechanism and the distance adjustment mechanism cooperate with each other. The distance between the welding roller and the ultrasonic welding head can be adjusted, making the transfer welding device suitable for automatic welding of foils of different thicknesses and composite current collectors, effectively improving the applicability of the transfer welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the overall structure of an embodiment of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A;

[0017] In the figure: 1. Foil unwinding roller; 2. Composite current collector unwinding roller; 3. Winding roller; 4. Correction mechanism; 5. Traction conveyor roller; 6. Tensioning roller; 7. Welding mechanism; 71. Ultrasonic welding head; 72. Welding roller; 73. Support bracket; 74. Support movable plate; 8. Distance adjustment mechanism; 81. Distance adjustment bracket; 82. Guide groove; 83. Connecting plate; 84. Rotating screw; 85. Rotating handle; 86. Fixed plate; 87. Connecting spring; 9. Support table; 10. Support roller. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0019] See attached Figures 1 to 2 As shown, a transfer welding device for a composite current collector in this embodiment includes a composite current collector unwinding roller 2 for unwinding and loading the composite current collector, a foil unwinding roller 1 and a take-up roller 3 respectively arranged on either side thereof, and a welding mechanism 7; the welding mechanism 7 includes an ultrasonic welding head 71 and a corresponding welding roller 72, and the welding roller 72 is provided with a distance adjustment mechanism 8 to adjust the distance between the welding head 71 and the ultrasonic welding head 71. The adjustable distance between the welding roller 72 and the ultrasonic welding head 71 makes the transfer welding device suitable for automatic welding of foils of different thicknesses to the composite current collector, effectively improving the applicability of the transfer welding device. The welding mechanism 7 is a rolling welding method, and the corresponding ultrasonic welding head 71 is a rolling welding head.

[0020] The welding mechanism 7 further includes a support bracket 73 for supporting the soldering roller 72. A support movable plate 74 is provided on the side of the support bracket 73 away from the soldering roller 72. The support bracket 73 is provided on both sides of the composite current collector, thereby supporting the soldering roller 72 from both ends.

[0021] The distance adjustment mechanism 8 includes a distance adjustment bracket 81, which has a guide slot 82 defined along its height. The end of the support movable plate 74, distal from the support bracket 73, extends horizontally through the guide slot 82 and is capable of vertical movement within the guide slot 82. The vertical movement of the support movable plate 74 within the guide slot 82 adjusts the distance between the support roller 72 and the ultrasonic welding head 71 to accommodate welding of foils of varying thicknesses to the composite current collector.

[0022] It also includes a fixed plate 86 and a rotating screw 84 arranged at the bottom of the distance adjustment bracket 81. The rotating screw 84 passes through the fixed plate 86 and is threadedly connected to it. A connecting plate 83 is provided on the top of the rotating screw 84. The connecting plate 83 is connected to the supporting movable plate 74 through a connecting spring 87. A supporting roller 10 in contact with the welding roller 72 is provided between the two relatively arranged connecting plates 83.

[0023] A rotating handle 85 is provided at one end of the rotating screw 84 away from the connecting plate 83. Rotating the rotating handle 85 rotates the rotating screw 84. The rotating screw 84 is connected to the connecting plate 83 via a direct-thrust bearing. Guided by the guide groove 82, the connecting plate 83 can only move up and down along the guide groove 82, thereby moving the support roller 72 toward or away from the ultrasonic horn 71. This adjusts the distance between the support roller 72 and the ultrasonic horn 71, thereby accommodating composite welding between foils of varying thicknesses and composite current collectors. The distance adjustment mechanism is provided on the support table 9.

[0024] The setting of the support roller 10 can, on the one hand, support the welding roller 72 when the composite foil passes through the ultrasonic welding head 71 and the welding roller 72 for welding. On the other hand, the support roller 10 and the welding roller 72 are not completely pressed together under the action of the connecting spring 87, so as not to affect the rotation of the welding roller 72.

[0025] A plurality of tensioning rollers 6 are respectively provided between the foil unwinding roller 1 and the welding mechanism 7, between the composite current collector unwinding roller 2 and the welding mechanism 7, and between the welding mechanism 7 and the winding roller 3. This ensures that the welded composite foil does not bend or wrinkle, and that the weld mark is accurately positioned without deviation, thereby improving the welding effect and increasing the welding efficiency.

[0026] The system also includes two symmetrically arranged traction conveyor rollers 5 along the transported composite current collector, and a deviation correction mechanism 4 is provided between the composite current collector unwinding roller 2 and the foil unwinding roller 1 and the traction conveyor rollers 5. This ensures that the relative positions of the foil and composite current collector do not deviate before they enter the traction conveyor rollers 5, allowing them to overlap at a preset position after entering the traction conveyor rollers 5, avoiding position errors during subsequent welding and ensuring welding efficiency.

[0027] The setting of the traction conveying roller 5 can enable the foil and the composite current collector to be conveyed in the same direction within a certain length, and to be conveyed to the welding mechanism 7 in an overlapping state, thereby reducing the speed difference between the two, making the conveying speeds of the two tend to be consistent, and then achieving relative fixation of the positions of the two, thereby improving the welding quality of the foil and the composite current collector.

[0028] The deflection correction mechanism 4 includes two parallel deflection correction rollers, on which the foil and the composite current collector are sequentially wrapped. The deflection correction mechanism 4 is driven by a motor, which cooperates with a sensor. The sensor can sense the position of the corresponding foil or composite current collector wrapped around the deflection correction roller. When the relative position of the foil and the composite current collector deviates, the rotating shaft of the motor drives the deflection correction roller to rotate, thereby causing the foil and the composite current collector to make a slight relative movement to correct the deflection of the foil and the composite current collector during the conveying process, so that the foil and the composite current collector entering the traction conveying roller 5 can overlap at a preset position to meet the requirements of the overlapping size and welding position.

[0029] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A transfer welding device for a composite current collector, comprising a composite current collector unwinding roller for unwinding and feeding the composite current collector, a foil unwinding roller and a winding roller respectively arranged on both sides thereof, characterized in that: It comprises a welding mechanism; the welding mechanism comprises an ultrasonic welding head and a welding roller corresponding to the ultrasonic welding head; the welding roller is provided with a distance adjustment mechanism to adjust the distance between the ultrasonic welding head and the welding roller.

2. The transfer welding device of a composite current collector according to claim 1, characterized in that: The welding mechanism further comprises a support bracket for supporting the welding roller, and a support movable plate is arranged on a side of the support bracket away from the welding roller.

3. A composite current collector transfer welding device according to claim 2, characterized in that: The distance adjustment mechanism comprises a distance adjustment bracket, a guide groove is arranged on the distance adjustment bracket along the height direction, and one end of the support movable plate away from the support bracket passes through the guide groove horizontally and can move up and down in the guide groove.

4. The transfer welding device of a composite current collector according to claim 3, characterized in that: It also includes a fixed plate and a rotating screw arranged at the bottom of the distance adjusting bracket, the rotating screw passes through the fixed plate and is threadedly connected to the fixed plate, a connecting plate is arranged on the top of the rotating screw, the connecting plate is connected to the supporting movable plate by a connecting spring, and a supporting roller in contact with the welding roller is arranged between the two relatively arranged connecting plates.

5. The transfer welding device of a composite current collector according to claim 1, characterized in that: A plurality of tensioning rollers are respectively arranged between the foil unwinding roller and the welding mechanism, between the composite current collector unwinding roller and the welding mechanism, and between the welding mechanism and the winding roller.

6. The transfer welding device of a composite current collector according to claim 1, characterized in that: It also includes two traction conveying rollers symmetrically arranged along the conveyed composite current collector, and a deviation correction mechanism is arranged between the composite current collector unwinding roller and the foil unwinding roller and the traction conveying rollers respectively.

7. The transfer welding device of a composite current collector according to claim 6, characterized in that: The deviation correction mechanism comprises two deviation correction rollers which are parallel to each other, and the foil material and the composite current collector are sequentially wrapped around the corresponding deviation correction rollers.

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