Battery string cutting and changing device

Abstract

This invention provides a strip cutting and changing device for battery strings, including a moving platform mechanism and a transfer line placed above the moving platform mechanism. A strip cutting and changing mechanism is mounted on the transfer line, and the strip cutting and changing mechanism includes a frame. The frame integrates a strip cutting component, a flux application component, a wire alignment component, and a weld reinforcement and pressing component. The advantages of this invention are: it integrates several mechanisms required for transfer and changing into a single frame, thereby reducing the space occupied on the transfer line. Combined with the moving platform mechanism, it further saves space. Simultaneously, the moving platform mechanism enables X, Y, and Z-direction driving of the product. During strip cutting, the strip cutting component converts lateral movement into vertical movement of the hook blade, reducing the space required for cutting. Furthermore, the structure of the strip cutting component makes the cutting force more uniform and the cutting effect better.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic module technology, specifically relating to a battery string welding strip cutting and cell replacement device. Background Technology

[0002] With the widespread application of solar energy, the solar photovoltaic panel industry has also flourished. During the production of solar panels, multiple cells and solder strips are welded into a string. The strings are then inspected, and only those that pass inspection are assembled with other components.

[0003] If defective cells are detected in the battery string, they need to be removed and replaced with good cells after transfer. This transfer and cell replacement typically involves different actions from a cutting mechanism, a cell transfer mechanism, a flux application mechanism, a wire alignment mechanism, and a cold solder joint repair mechanism. Specifically, the cutting mechanism, positioned on the transfer line, moves along three axes. Driven directly by a drive cylinder, the cutting mechanism cuts the solder strips at both ends of the defective cells, which are laid flat on the support platform, to achieve separation. Other mechanisms on the transfer line then complete the cell replacement. Therefore, a large space needs to be reserved above the battery string to allow for smooth three-axis movement of the cutting mechanism and the setup of multiple mechanisms. The constant switching and repositioning between these mechanisms results in a slow overall cycle time, and the direct drive of the cutting mechanism also leads to poor cutting results. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a battery string welding strip cutting and changing device, which can effectively perform steps such as cutting the battery string welding strip and improve the changing cycle time.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A battery string welding strip cutting and changing device includes a moving platform mechanism and a transfer line placed above the moving platform mechanism. The welding strip cutting and changing mechanism is mounted on the transfer line. The welding strip cutting and changing mechanism includes a frame, on which a welding strip cutting component, a flux application component, a wire alignment component, and a poor solder joint pressing component are integrated.

[0007] Preferably, the mobile platform mechanism includes a base plate, a support plate placed above the base plate, and an up-and-down driving mechanism disposed below the base plate.

[0008] Preferably, a guide assembly is provided below the support plate.

[0009] Preferably, the moving platform mechanism includes a central moving platform mechanism and a left moving platform mechanism and a right moving platform mechanism respectively located on the left and right sides of the central moving platform mechanism. The left moving platform mechanism and the right moving platform mechanism reciprocate in the Z-axis and X-axis directions, and the central moving platform mechanism reciprocates in the Z-axis direction.

[0010] Preferably, a lateral moving component is provided between the base plate and the support plate of both the left moving platform mechanism and the right moving platform mechanism.

[0011] Preferably, the lateral movement component includes a lateral movement guide rail and a lateral drive cylinder placed on one side of the guide rail. The lateral movement guide rail is oriented in the same direction as the battery string transmission direction, and the lateral drive cylinder drives the support plate to move in the X-axis direction.

[0012] Preferably, the up-and-down driving mechanism is an up-and-down driving cylinder.

[0013] Preferably, the guiding assembly includes a guiding plate placed below the support plate and guiding blocks placed on both sides of the guiding plate, wherein the guiding blocks are placed on the outside of the support plate.

[0014] Preferably, the filler soldering assembly includes a pressing drive cylinder mounted on a frame. The drive shaft of the pressing drive cylinder is connected to a solder strip pressing head via a connecting rod. The number of solder strip pressing heads is equal to the number of solder strips. The pressing drive cylinder drives the solder strip pressing heads to move up and down.

[0015] Preferably, the welding strip cutting assembly includes a substrate and a transverse cutting cylinder placed on the substrate. A cutting block is abutted against below the transverse cutting cylinder via a connected guide block. Hooks are evenly distributed at the lower end of the cutting block, and a guide wheel is connected to the cutting block. The lower part of the guide block abuts against the guide wheel. When the transverse cutting cylinder is working, it drives the guide block to move, and the guide block abuts against the guide wheel to drive the cutting block to move.

[0016] Preferably, the two ends of the cutting block are mounted on the cutting slide rail, which is vertically placed on both sides of the horizontal cutting cylinder. A buffer spring is provided on the inner side of the cutting slide rail, with the lower end of the buffer spring connected to the cutting block and the upper end connected to the substrate.

[0017] Preferably, the transfer line includes transfer guide rails disposed on both sides of the moving platform mechanism, and transfer racks are disposed on the outer side of the transfer guide rails. The frame of the welding strip cutting and changing mechanism includes a transfer base plate mounted on the transfer guide rails. A second transfer base plate is disposed on the transfer base plate. A transfer motor and a second transfer motor are respectively disposed on the transfer base plate and the second transfer base plate. When the transfer motor is working, it drives the transfer base plate to move on the transfer guide rails. When the second transfer motor is working, it drives the second transfer base plate to move on the transfer base plate.

[0018] The beneficial effects of this invention are as follows: This invention integrates several mechanisms required for transfer and replacement of the product into a single frame, thereby reducing the space occupied on the transfer line. Combined with the moving platform mechanism, it can further save space. Simultaneously, the moving platform mechanism enables the product to be driven in the X, Y, and Z directions. During ribbon cutting, the ribbon cutting component converts the lateral movement into the up-and-down movement of the hook blade, reducing the space required for the cutting motion. Furthermore, the structure of the ribbon cutting component makes the cutting force more uniform, resulting in better cutting performance. Attached Figure Description

[0019] Figure 1 : A schematic diagram of the structure of this utility model.

[0020] Figure 2 : A structural schematic diagram of the present invention in its working state, in which the transfer line above the mobile platform is hidden.

[0021] Figure 3 : A schematic diagram of the welding strip cutting and changing mechanism in this utility model.

[0022] Figure 4 : Another perspective structural schematic diagram of the welding strip cutting and changing mechanism in this utility model.

[0023] Figure 5 : A schematic diagram of the structure of the welding strip cutting component in the welding strip cutting and changing mechanism of this utility model.

[0024] Figure 6 : A schematic diagram of the mobile platform mechanism in this utility model.

[0025] Figure 7 : A schematic diagram showing the state and position relationship between the welding strip cutting assembly and the moving platform mechanism before cutting.

[0026] Figure 8 This utility model presents a schematic diagram showing the positional relationship between the welding strip cutting component and the moving platform mechanism during left-side welding strip cutting.

[0027] Figure 9 This utility model presents a schematic diagram showing the positional relationship between the welding strip cutting component and the moving platform mechanism during right-side welding strip cutting. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description is provided in conjunction with the appendix. Figures 1-9 The present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] This utility model discloses a strip cutting and changing device for battery strings, comprising a moving platform mechanism 1 and a transfer line positioned above and outside the moving platform mechanism 1. A strip cutting and changing mechanism 4 is installed on the transfer line. The height difference between the transfer line and the moving platform mechanism 1 is small. The transfer line includes transfer guide rails 47 disposed on both sides of the moving platform mechanism, and transfer racks 471 are disposed on the outer side of the transfer guide rails 47. The extending direction of the transfer guide rails 47 is consistent with the extending direction of the moving platform mechanism.

[0030] To make full use of space, the solder strip cutting and changing mechanism 4 integrates multiple components into one unit. This design avoids the need for other components to constantly make way for each other when different components are operating. Simultaneously, it can further improve the cycle time of the device. The solder strip cutting and changing mechanism 4 includes a solder strip cutting component 41, a flux application component 43, a wire alignment component 44, and a weld filler pressing component 42, all integrated on the same frame. In this embodiment, these four components are arranged sequentially from one side of the frame to the other.

[0031] In this embodiment, the frame of the welding strip cutting and changing mechanism includes a transfer base plate 452 mounted on a transfer guide rail 47. A second transfer base plate 454 is provided on the transfer base plate 452 via a second transfer track 453. The second transfer track 453 is perpendicular to the transfer guide rail 47.

[0032] A transfer motor 46 is provided on the transfer base plate 452. A transfer gear 461 is connected to the bottom of the transfer motor 46 via a motor shaft. The transfer gear 461 meshes with the transfer rack 471. When the transfer motor 46 is working, it drives the transfer base plate 452 to move on the transfer guide rail 47.

[0033] A second transfer motor 45 is provided on the second transfer base plate 453, and a second transfer gear 451 is connected to the bottom of the second transfer motor 45 via a motor shaft. The second transfer gear 451 meshes with a second rack located on one side of the second transfer base plate 453. When the second transfer gear 451 operates, it drives the second transfer base plate 453 to move along the second transfer track 453.

[0034] The welding strip cutting assembly 41, flux application assembly 43, wire alignment assembly 44, and weld repair pressing assembly 42 are all placed on the second transfer base plate 453.

[0035] Furthermore, the welding strip cutting assembly 41 includes a base plate connected to the second transfer base plate support, the base plate being set at an angle to the horizontal plane, that is, at an angle to the moving platform mechanism 1. The angle is typically less than 90°.

[0036] A transverse cutting cylinder 411 is provided at the upper end of the substrate. A cutting block 414 is abutted against the lower end of the transverse cutting cylinder 411 via a guide block 412. Hooks 415 are evenly distributed at the lower end of the cutting block 414. When the transverse cutting cylinder 411 is working, it will drive the guide block 412 to move. The movement of the guide block will in turn drive the cutting block 414 to move, thereby realizing the driving movement of the hooks.

[0037] Specifically, the upper end of the guide block 412 is connected to the transverse cutting cylinder 411 via a connecting rod, and the lower end of the guide block 412 is connected to the guide wheel 416 disposed on the upper end of the cutting block 414. A set of guide wheels 416 is provided, abutting against the oblique side of the lower end 413 of the guide block. The cutting block 414 has a door-shaped cross-section, with its left and right ends respectively surrounding both sides of the transverse cutting cylinder 411. A cutting slide rail 418 is provided on each side of the transverse cutting cylinder 411, and the left and right ends of the cutting block 414 are mounted on the cutting slide rail 418, allowing it to move up and down on the cutting slide rail 418. A buffer spring 417 is provided inside the cutting slide rail 418, with its lower end connected to the cutting block 414 and its upper end connected to a positioning post on the base plate. In this embodiment, the welding strip cutting assembly 41, when cutting welding strips, utilizes a structure between the hook blade and the transverse cutting cylinder to achieve a more uniform force distribution, and the buffer spring provides better cushioning, resulting in a better welding strip cutting effect. The filler welding pressing assembly 42 includes a pressing drive cylinder 421 mounted on a frame. The drive shaft of the pressing drive cylinder 421 is connected to welding strip pressing heads 422 via a connecting rod. The number of welding strip pressing heads 422 is approximately equal to the number of welding strips. The operation of the pressing drive cylinder 421 drives the welding strip pressing heads 422 to move up and down.

[0038] To better save space in the upper part of the device and improve the overall working speed, the mobile platform mechanism 1 of this utility model can realize the position change of the battery string itself. The mobile platform mechanism 1 includes a base plate, a support plate placed above the base plate, and a vertical drive mechanism, which is a vertical drive cylinder, arranged below the base plate. A guide assembly is arranged below the support plate for guiding the battery string placed on the support plate. The guide assembly includes a guide plate 17 placed below the support plate and guide blocks 18 placed on both sides of the guide plate 17, with the guide blocks 18 placed on the outside of the support plate. The bottom of the guide plate 17 is mounted on a guide rail 16 by a slider. The mounting direction of the guide rail 16 is perpendicular to the transmission direction of the battery string. Usually, the battery string is long and will have a certain offset during transmission. When the battery string is placed on the support plate and before the welding strip is cut, it is guided by the guide assembly.

[0039] Furthermore, the mobile platform mechanism includes a central mobile platform mechanism and a left mobile platform mechanism and a right mobile platform mechanism respectively located on the left and right sides of the central mobile platform mechanism.

[0040] Both the left and right moving platform mechanisms reciprocate along the Z and X axes, while the middle moving platform mechanism reciprocates along the Z axis. A lateral moving assembly is provided between the base plate and the support plate of both the left and right moving platform mechanisms. The lateral moving assembly includes a lateral moving guide rail and a lateral drive cylinder positioned on one side of the guide rail. The lateral moving guide rail is oriented in the same direction as the battery string transmission direction, and the lateral drive cylinder drives the support plate to move along the X axis.

[0041] To better understand the platform movement method of this utility model, the cutting steps are described below in conjunction with the accompanying drawings:

[0042] As shown in the figure, the defective battery cell 31 on the battery string needs to be cut off. At this time, the left solder strip 31 and the right solder strip 32 of the battery cell need to be cut off.

[0043] After the battery string is aligned, the left-side up-and-down drive cylinder 15 at the bottom of the left moving platform mechanism operates, lifting the left base plate 11 onto the platform. Simultaneously, the lateral drive cylinder 13 at the bottom of the left support plate 12 operates, moving the left support plate 12 to the right on the left lateral guide rail 14. At this point, a height difference is formed between the left moving platform mechanism and the middle moving platform mechanism, and the welding strip also forms an inclined angle. The transfer motor 46 drives the welding strip cutting and changing mechanism 4 to be positioned above the cutting position. The lateral cutting cylinder 411 of the welding strip cutting assembly 41 operates, driving the hook knife 415 into the gap between the welding strips. The second transfer motor 45 operates, driving the second transfer base plate to achieve displacement in the Y direction. The lateral cutting cylinder 411 of the welding strip cutting assembly 41 operates, driving the hook knife to perform the cutting action on the welding strip, completing the cutting of the welding strip on this side. After completion, all components are reset.

[0044] Then, the middle up-and-down drive cylinder 33 operates, raising the middle base plate and lifting the defective battery cell 31. At this time, the right transverse drive cylinder 23 below the right support plate 22 operates, moving the right support plate to the left on the right transverse guide rail 24, forming an inclined angle for the right solder strip. Similarly, the solder strip cutting assembly 41 cuts the solder strip on this side. After completion, all components are reset.

[0045] After the solder strip is cut, the battery cell is removed by an external transfer mechanism, and a new, high-quality battery cell is placed in the machine. Replacement is then completed through wire pulling and welding. Since the replacement and welding steps are the same as in existing technologies and are not the focus of this invention, they will not be described in detail here. This invention uses a moving platform mechanism to achieve movement of the battery string in the XYZ directions, which, combined with the solder strip cutting and cell replacement mechanism, greatly improves the cell replacement cycle time. The gear and rack structure in this invention enables low-cost, high-precision displacement changes.

[0046] Finally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., appearing in the text, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Furthermore, the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery string welding strip cutting and changing device, characterized in that: The device includes a mobile platform mechanism and a transfer line placed above the mobile platform mechanism. A solder strip cutting and changing mechanism is mounted on the transfer line. The solder strip cutting and changing mechanism includes a frame, on which a solder strip cutting component, a flux application component, a wire alignment component, and a weld repair and pressing component are integrated.

2. The battery string welding strip cutting and changing device as described in claim 1, characterized in that: The mobile platform mechanism includes a base plate, a support plate placed above the base plate, an up-and-down driving mechanism disposed below the base plate, and a guide assembly disposed below the support plate.

3. The battery string welding strip cutting and changing device as described in claim 2, characterized in that: The mobile platform mechanism includes a central mobile platform mechanism and a left mobile platform mechanism and a right mobile platform mechanism respectively located on the left and right sides of the central mobile platform mechanism. The left mobile platform mechanism and the right mobile platform mechanism reciprocate in the Z-axis and X-axis directions, and the central mobile platform mechanism reciprocates in the Z-axis direction.

4. The battery string welding strip cutting and changing device as described in claim 3, characterized in that: Both the left and right moving platform mechanisms have lateral moving components installed between their base plates and support plates.

5. The battery string welding strip cutting and changing device as described in claim 4, characterized in that: The lateral movement component includes a lateral movement guide rail and a lateral drive cylinder placed on one side of the guide rail. The lateral movement guide rail is oriented in the same direction as the battery string transmission direction, and the lateral drive cylinder drives the support plate to move in the X-axis direction.

6. The battery string welding strip cutting and changing device as described in claim 5, characterized in that: The alignment component includes an alignment plate placed below the support plate and alignment blocks placed on both sides of the alignment plate, with the alignment blocks placed on the outside of the support plate.

7. The battery string welding strip cutting and changing device as described in claim 6, characterized in that: The filler welding pressing assembly includes a pressing drive cylinder mounted on a frame. The drive shaft of the pressing drive cylinder is connected to a welding strip pressing head via a connecting rod. The number of welding strip pressing heads is equal to the number of welding strips. The pressing drive cylinder drives the welding strip pressing heads to move up and down.

8. The battery string welding strip cutting and changing device as described in claim 7, characterized in that: The welding strip cutting assembly includes a substrate and a transverse cutting cylinder placed on the substrate. A cutting block is abutted against the lower part of the transverse cutting cylinder via a connected guide block. Hooks are evenly distributed at the lower end of the cutting block, and a guide wheel is connected to the cutting block. The lower part of the guide block abuts against the guide wheel. When the transverse cutting cylinder is working, it drives the guide block to move. The guide block abuts against the guide wheel and drives the cutting block to move.

9. The battery string welding strip cutting and changing device as described in claim 8, characterized in that: The two ends of the cutting block are mounted on the cutting slide rail, which is vertically placed on both sides of the horizontal cutting cylinder. A buffer spring is provided on the inner side of the cutting slide rail, with the lower end of the buffer spring connected to the cutting block and the upper end connected to the base plate.

10. The battery string welding strip cutting and changing device as described in claim 9, characterized in that: The transfer line includes transfer guide rails disposed on both sides of the moving platform mechanism. A transfer rack is disposed on the outer side of the transfer guide rail. The frame of the welding strip cutting and changing mechanism includes a transfer base plate mounted on the transfer guide rail. A second transfer base plate is disposed on the transfer base plate. A transfer motor and a second transfer motor are respectively disposed on the transfer base plate and the second transfer base plate. When the transfer motor is working, it drives the transfer base plate to move on the transfer guide rail. When the second transfer motor is working, it drives the second transfer base plate to move on the transfer base plate.

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