Composite current collector welding device

Abstract

The utility model discloses a composite current collector welding device which comprises a supporting bottom frame, a transverse sliding rail is arranged at the top of the supporting bottom frame, a bottom plate is connected to the top of a sliding block corresponding to the transverse sliding rail, a driving air cylinder parallel to the transverse sliding rail is installed in the center of the supporting bottom frame, the output end of the driving air cylinder is connected with the bottom plate, and a supporting plate is arranged above the bottom plate. Longitudinal sliding rails perpendicular to the transverse sliding rails are installed on the top of the supporting plate, the tops of the sliding blocks corresponding to the longitudinal sliding rails are connected with a positive electrode welding assembly and a negative electrode welding assembly which are symmetrically arranged respectively, and a driving lead screw connected with the positive electrode welding assembly and the negative electrode welding assembly is installed between the longitudinal sliding rails. The two welding assemblies are used for welding the positive electrode and the negative electrode of the composite current collector at the same time, the situation that a workpiece to be machined moves back and forth, so that a battery cover plate and the surface of the composite current collector deviate, and the welding quality is affected is avoided, and the welding assemblies adjustable in position in all directions are suitable for welding composite current collectors of various specifications; and the welding yield and the welding efficiency are improved.

Description

Technical Field

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

[0002] The current collectors in common lithium-ion batteries are mainly divided into two categories, one is pure metal foil as the current collector, and the other is a composite current collector. The composite current collector has the function of reducing the mass of the current collector per unit area, thereby achieving high energy density and lightweight of lithium batteries.

[0003] In the process of welding the positive and negative electrode current collectors of the existing composite current collectors to the battery cell, the composite current collectors need to be changed in position to complete the welding. During the movement, the battery cover and the surface of the composite current collector are easily offset, resulting in inaccurate fitting position of the two, thereby reducing the welding yield and welding efficiency. Utility Model Content

[0004] In order to solve the above technical problems, a composite current collector welding device is provided.

[0005] To achieve the above-mentioned purpose, the utility model discloses a composite current collector welding device, including a supporting frame, a transverse slide rail is arranged on the top of the supporting frame, the top of the slider corresponding to the transverse slide rail is connected to the bottom plate, a driving cylinder arranged parallel to the transverse slide rail is installed in the center of the supporting frame, the output end of the driving cylinder is connected to the bottom plate, a support plate is arranged above the bottom plate, a longitudinal slide rail arranged perpendicular to the transverse slide rail is installed on the top of the support plate, the top of the slider corresponding to the longitudinal slide rail is respectively connected to a symmetrically arranged positive electrode welding assembly and a negative electrode welding assembly, and a driving screw connected to the positive electrode welding assembly and the negative electrode welding assembly is installed between the longitudinal slide rails.

[0006] Furthermore, the positive electrode welding assembly and the negative electrode welding assembly have the same structure, and are both installed on the driving screw through a threaded sleeve at the bottom, and the thread rotation directions of the threaded sleeves corresponding to the positive electrode welding assembly and the negative electrode welding assembly are opposite.

[0007] Furthermore, the positive electrode welding assembly includes a pedestal connected to a slide block corresponding to the longitudinal slide rail, a lifting mechanism is arranged on the top of the pedestal, a welding head driving mechanism is arranged on the side of the lifting mechanism, a vertically arranged first welding head is connected to the side of the lifting mechanism away from the welding head driving mechanism, a second welding head connected to the lifting mechanism is arranged correspondingly in the vertical direction above the first welding head, and a pressurized cylinder is connected to the top of the second welding head.

[0008] Furthermore, a height adjustment component is arranged between the base plate and the support plate, and the height adjustment component includes a fixing seat fixed at the four corners of the base plate, the fixing seat is provided with a slot along the sliding direction of the transverse slide rail, an adjustment plate is movably installed in the slot, at least two adjustment plates are arranged and are symmetrically installed about the driving cylinder, and the adjustment plates are fixedly connected by a connecting plate.

[0009] Furthermore, a vertically mounted push rod is provided on the top of the connecting plate, and a push cylinder installed on the bottom plate is provided behind the push rod. The push cylinder is located above the driving cylinder, and a collar is provided at the output end of the push cylinder and is sleeved on the push rod.

[0010] Furthermore, the fixing seat is provided with a pad below the notch, the adjusting plate is mounted on the pad, both ends of the adjusting plate are provided with slide grooves and push-out blocks are fixed in the slide grooves, and the center of the fixing seat is provided with a sliding block that abuts against the push-out block.

[0011] Furthermore, the top of the ejection block is an inclined surface, and a circular arc protrusion is arranged near the highest point of the inclined surface of the ejection block.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a composite current collector welding device, in which two groups of welding components simultaneously weld the positive and negative electrodes of the composite current collector, thereby avoiding the back-and-forth movement of the workpiece to be processed, causing the battery cover and the surface of the composite current collector to be offset, thereby affecting the welding quality; the welding components with adjustable positions in all directions are suitable for welding of composite current collectors of various specifications, thereby improving the welding yield and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the height adjustment component of the utility model.

[0016] Figure 3 For this utility model Figure 2 Partial view A.

[0017] Figure 4 It is a schematic diagram of the push-up block of the utility model.

[0018] In the figure: 1 is a supporting frame; 2 is a transverse slide rail; 20 is a driving cylinder; 3 is a height adjustment assembly; 30 is a push cylinder; 31 is a push rod; 32 is a fixed seat; 33 is an adjustment plate; 34 is a connecting plate; 35 is a cushion block; 36 is a push block; 37 is a sliding block; 4 is a bottom plate; 5 is a support plate; 6 is a driving screw rod; 7 is a longitudinal slide rail; 8 is a positive electrode welding assembly; 80 is a pedestal; 81 is a lifting mechanism; 82 is a welding head driving mechanism; 83 is a pressurized cylinder; 84 is a first welding head; 85 is a second welding head; 9 is a negative electrode welding assembly. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0020] An embodiment of the utility model, as Figure 1 As shown, a transverse slide rail 2 is arranged on the top of the support base frame 1, and the top of the slider corresponding to the transverse slide rail 2 is connected to the bottom plate 4, a driving cylinder 20 arranged parallel to the transverse slide rail 2 is installed in the center of the support base frame 1, and the output end of the driving cylinder 20 is connected to the bottom plate 4, and a support plate 5 is arranged above the bottom plate 4, and a longitudinal slide rail 7 arranged vertically to the transverse slide rail 2 is installed on the top of the support plate 5, and the tops of the sliders corresponding to the longitudinal slide rails 7 are respectively connected to symmetrically arranged positive electrode welding assemblies 8 and negative electrode welding assemblies 9, and a driving screw 6 connected to the positive electrode welding assembly 8 and the negative electrode welding assembly 9 is installed between the longitudinal slide rails 7.

[0021] The positive electrode welding assembly 8 and the negative electrode welding assembly 9 have the same structure and are both installed on the driving screw 6 through the threaded sleeve at the bottom. The threaded sleeves corresponding to the positive electrode welding assembly 8 and the negative electrode welding assembly 9 have opposite spiral directions. When the driving screw 6 rotates, the threaded sleeves with opposite spiral directions drive the positive electrode welding assembly 8 and the negative electrode welding assembly 9 connected to them to move toward or in the opposite direction. The adjustment accuracy is high and can meet the welding requirements of composite current collectors of different length specifications.

[0022] The positive electrode welding assembly 8 includes a pedestal 80 connected to the slider corresponding to the longitudinal slide rail 7, a lifting mechanism 81 is arranged on the top of the pedestal 80, a welding head driving mechanism 82 is arranged on the side of the lifting mechanism 81, a vertically arranged first welding head 84 is connected to the side of the lifting mechanism 81 away from the welding head driving mechanism 82, a second welding head 85 connected to the lifting mechanism 81 is arranged in the vertical direction above the first welding head 84, and a pressurized cylinder 83 is connected to the top of the second welding head 85. The two groups of welding assemblies can weld the positive and negative electrodes of the composite current collector at the same time, reducing the displacement process, avoiding the displacement of the battery cover and the surface of the composite current collector during movement, and improving the welding quality.

[0023] like Figure 2 As shown, a height adjustment component 3 is arranged between the base plate 4 and the support plate 5. The height adjustment component 3 includes a fixing seat 32 fixed at the four corners of the base plate 4. The fixing seat 32 is provided with a slot along the sliding direction of the transverse slide rail 2. An adjustment plate 33 is movably installed in the slot. There are at least two adjustment plates 33 and they are symmetrically installed about the driving cylinder 20. The adjustment plates 33 are fixedly connected by a connecting plate 34.

[0024] A vertically mounted push rod 31 is provided on the top of the connecting plate 34, and a push cylinder 30 installed on the bottom plate 4 is provided behind the push rod 31. The push cylinder 30 is located above the driving cylinder 20, and a collar is provided at the output end of the push cylinder 30 to be sleeved on the push rod 31. Figure 3 As shown, a pad 35 is provided below the notch of the fixed seat 32, and the adjusting plate 33 is mounted on the pad 35. A rough surface is provided on the contact surface between the top of the pad 35 and the adjusting plate 33 to increase friction and avoid slipping and causing safety accidents. Slide grooves are provided at both ends of the adjusting plate 33 and push-out blocks 36 are fixed in the slide grooves. A sliding block 37 is provided in the center of the fixed seat 32 to abut against the push-out block 36. When the push-out cylinder 30 is actuated, the push rod 31 connected to the collar is driven by the thrust to drive the connecting plate 34 to drive the adjusting plate 33 to slide to the right, and the push-out block 36 fixedly connected to the adjusting plate 33 lifts the sliding block 37 upward, so that the support plate in contact with the sliding block 37 and the welding assembly above it rise, thereby realizing height adjustment.

[0025] like Figure 4 As shown, the top of the ejection block 36 is an inclined surface, and an arc protrusion is provided near the highest point of the inclined surface of the ejection block 36. When the ejection cylinder 30 pushes the adjustment plate 33 connected to the connecting plate 34, the ejection block 36 is driven to slide to the right, and the inclined surface of the ejection block 36 abuts against the sliding block 37, pushing the sliding block 37 upward, and the top of the sliding block 37 abuts against the support plate, thereby realizing the height adjustment of the entire welding assembly. When the highest point of the arc protrusion contacts the sliding block 37, the maximum adjustment height is reached.

[0026] The working principle of this embodiment is as follows: the spacing, height and front and rear positions of the positive and negative electrode welding assemblies are adjusted according to the specifications of the composite current collectors to be welded. The feeding mechanism feeds the composite current collectors and the battery cover plates to the welding positions of the two sets of welding assemblies, and simultaneously welds the positive and negative electrode tabs on both sides.

[0027] Several points that need to be explained are: First, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two elements, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change; secondly, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0028] The above examples are merely illustrative of the present utility model and do not constitute a limitation on the protection scope of the present utility model. All designs that are identical or similar to the present utility model fall within the protection scope of the present utility model.

Claims

1. A composite current collector welding device, comprising a supporting frame, characterized in that: A transverse slide rail (2) is arranged on the top of the support base frame (1), and the top of the slider corresponding to the transverse slide rail (2) is connected to the bottom plate (4). A driving cylinder (20) arranged parallel to the transverse slide rail (2) is installed at the center of the support base frame (1), and the output end of the driving cylinder (20) is connected to the bottom plate (4). A support plate (5) is arranged above the bottom plate (4), and a longitudinal slide rail (7) arranged perpendicular to the transverse slide rail (2) is installed on the top of the support plate (5). The tops of the sliders corresponding to the longitudinal slide rails (7) are respectively connected to symmetrically arranged positive electrode welding assemblies (8) and negative electrode welding assemblies (9), and a driving screw rod (6) connected to the positive electrode welding assembly (8) and the negative electrode welding assembly (9) is installed between the longitudinal slide rails (7).

2. A composite current collector welding device according to claim 1, characterized in that: The positive electrode welding assembly (8) and the negative electrode welding assembly (9) have the same structure and are both mounted on the driving screw rod (6) via a threaded sleeve at the bottom, and the threaded sleeves corresponding to the positive electrode welding assembly (8) and the negative electrode welding assembly (9) have opposite threaded directions.

3. A composite current collector welding device according to claim 2, characterized in that: The positive electrode welding assembly (8) comprises a pedestal (80) connected to a slider corresponding to the longitudinal slide rail (7); a lifting mechanism (81) is arranged on the top of the pedestal (80); a welding head driving mechanism (82) is arranged on the side of the lifting mechanism (81); a vertically arranged first welding head (84) is connected to a side of the lifting mechanism (81) away from the welding head driving mechanism (82); a second welding head (85) connected to the lifting mechanism (81) is arranged in a vertical direction above the first welding head (84); and a pressurized cylinder (83) is connected to the top of the second welding head (85).

4. A composite current collector welding device according to claim 1, characterized in that: A height adjustment assembly (3) is provided between the base plate (4) and the support plate (5), the height adjustment assembly (3) comprising a fixing seat (32) fixed at four corners of the base plate (4), the fixing seat (32) being provided with a slot along the sliding direction of the transverse slide rail (2), an adjustment plate (33) being movably installed in the slot, at least two adjustment plates (33) being provided and symmetrically installed with respect to the driving cylinder (20), and the adjustment plates (33) being fixedly connected by a connecting plate (34).

5. A composite current collector welding device according to claim 4, characterized in that: A vertically mounted push rod (31) is disposed on the top of the connecting plate (34), and a push cylinder (30) mounted on the bottom plate (4) is disposed behind the push rod (31). The push cylinder (30) is located above the driving cylinder (20), and a collar is disposed at the output end of the push cylinder (30) and sleeved on the push rod (31).

6. A composite current collector welding device according to claim 4, characterized in that: The fixing seat (32) is provided with a cushion block (35) below the notch, the adjusting plate (33) is mounted on the cushion block (35), both ends of the adjusting plate (33) are provided with slide grooves and push-out blocks (36) are fixed in the slide grooves, and a sliding block (37) is provided at the center of the fixing seat (32) to abut against the push-out block (36).

7. A composite current collector welding device according to claim 6, characterized in that: The top of the push-out block (36) is an inclined surface, and a circular arc protrusion is arranged near the highest point of the inclined surface of the push-out block (36).

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