A flexible module cell fracture propagation device and method

Abstract

This invention belongs to the field of flexible batteries, specifically relating to a device and method for splitting and widening flexible module battery cells. The splitting and widening device includes a supporting base plate and a lower suction plate assembly. The lower suction plate assembly includes two side plates spaced apart along a first direction and multiple lower suction plates. The side plates are provided with multiple inclined grooves, which are symmetrically divided into two groups around the middle position of the side plates. The inclination angle of the grooves in each group is the same. The length of each group of grooves gradually increases from the side closer to the middle position to the side farther from the middle position. When the pressing component and the lower suction plate assembly press down together, the device performs stepped staggered splitting of large battery cells that have not been split after one pre-splitting, while any two adjacent small battery cells are also widened at equal intervals. This realizes that the two processes of splitting large battery cells into small battery cells and arranging small battery cells at equal intervals are completed on one device at the same time, simplifying the production process and improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of flexible battery technology, specifically relating to a flexible module battery cell fracture propagation device and method. Background Technology

[0002] To achieve the rollability and bendability of flexible modules, large solar cells are typically cut into hundreds of smaller cells, which are then arranged and connected at equal intervals. During the arrangement of these smaller cells, a strict equal-interval distribution must be maintained in both the lateral and longitudinal directions to meet the requirements of subsequent encapsulation, welding, electrical connections, and overall module stability.

[0003] In traditional technology, the process of splitting large solar cells into smaller solar cells and arranging the smaller solar cells at equal intervals in both the horizontal and vertical directions is completed in two separate processes: splitting and widening. Furthermore, a regularization process is often required between the splitting and widening processes, resulting in low efficiency for the entire splitting and widening process, and there is still room for improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible module cell splitting and spacing expansion device and method, so as to at least solve the problem that the cell splitting and spacing expansion processes need to be completed separately in the prior art, which affects the production efficiency of the cells.

[0005] To achieve the above objectives, in a first aspect, embodiments of the present invention provide a flexible module solar cell fracture propagation device, wherein the protective layer and silicon wafer of the solar cell are provided with mutually aligned scratches, and the fracture propagation device includes:

[0006] Support base plate;

[0007] The column assembly and the pressing assembly are provided. The lower end of the column assembly is fixed to the support base plate, and the upper end is fixed with a linear module that can move along a first direction. The pressing assembly is connected to the movable end of the linear module. The first direction is the length direction of the support base plate.

[0008] The lower suction plate assembly, mounted on the supporting base plate, includes two side plates spaced apart along a first direction and multiple lower suction plates. Each side plate has multiple inclined grooves, symmetrically divided into two groups around the middle of the side plates. The inclination angle of each group of grooves is the same. The length of each group of grooves gradually increases from the side closest to the middle to the side furthest from the middle, and the upper center of each groove is located on the same horizontal plane. The two ends of each lower suction plate engage with the grooves on the side plates. When the pressing assembly engages with the lower suction plate assembly, it presses the multiple lower suction plates corresponding to the two groups of grooves into a stepped distribution, causing the battery cells placed on the lower suction plates to simultaneously break and expand at equal intervals.

[0009] In one possible implementation, the lower suction plate assembly further includes: a base plate, a lower limiting block, a first air pipe connector, a guide wheel, a guide wheel shaft, a first spring, and a connecting plate; the lower limiting block, the side plate, and the connecting plate are all fixedly mounted on the base plate; the lower limiting block, the lower suction plate, and the center suction plate are each equipped with a first air pipe connector on both sides; the first air pipe connector is connected to a vacuum generator via an air pipe to achieve vacuum breaking of the lower limiting block, the lower suction plate, and the center suction plate; the lower suction plate engages with a wheel groove on the side plate via the guide wheel shaft and the guide wheel, and can slide obliquely within the wheel groove; the first spring is disposed between the lower limiting block and the lower suction plate.

[0010] In one possible implementation, the lower suction plate assembly further includes a central suction plate, the two ends of which are respectively connected to the two side plates, thereby dividing the plurality of lower suction plates into two groups corresponding to the wheel groove.

[0011] In one possible implementation, the pressing assembly includes: a first lifting cylinder, an adapter plate, a mounting plate, a bearing, a pressing roller, and a bearing seat plate; the first lifting cylinder is connected to the movable end of the linear module via a connecting seat, the adapter plate connects the movable end of the first lifting cylinder to the mounting plate, two bearing seat plates are spaced apart along a first direction and are respectively connected to the bottom of the mounting plate, and the pressing rollers are respectively connected to the bearing seat plates via the bearings; the pressing rollers are arranged in a one-to-one correspondence with the lower suction plates, and are used to press the corresponding plurality of lower suction plates down into a stepped distribution.

[0012] In one possible implementation, the plurality of the lower pressure rollers are symmetrically divided into two groups with respect to the center position of the bearing seat plate, and the distance from the axis of each group of lower pressure rollers to the mounting plate increases sequentially from the center position of the bearing seat plate to both sides.

[0013] In one possible implementation, the flexible module cell splitting and widening device further includes: a feeding platform and an upper suction plate assembly; the feeding platform is mounted on the supporting base plate and is disposed on one side of the lower suction plate assembly along a first direction; the upper suction plate assembly is connected to the movable end of the linear module through the connecting seat; the upper suction plate assembly is used to adsorb and transport the split and widened cell to the feeding platform.

[0014] In one possible implementation, the upper suction plate assembly includes: a second lifting cylinder, a lifting cylinder mounting plate, a heightening side plate, a connecting base plate, an upper suction plate, and a second air pipe connector; the lifting cylinder mounting plate, the heightening side plate, and the connecting base plate form the basic frame of the upper suction plate assembly; the second lifting cylinder is connected to the movable end of the linear module through the connecting seat; the lower end of the second lifting cylinder is fixedly connected to the lifting cylinder mounting plate; the upper suction plate is equipped with the second air pipe connector, which is used to connect to a vacuum generating device through an air pipe, thereby realizing the placement and removal of battery cells through vacuum adsorption.

[0015] In one possible implementation, the upper suction plate assembly further includes: a guide rod, a linear bearing, a second spring, and an adjusting screw; the lower end of the guide rod is connected to the upper surface of the upper suction plate, and the upper end of the guide rod passes through the connecting base plate and the linear bearing located at the bottom of the connecting base plate, for guiding the lifting and lowering of the upper suction plate; the adjusting screw is used to adjust the initial position of the upper suction plate, and a second spring is sleeved on the adjusting screw located between the upper suction plate and the connecting base plate, and the extension and retraction length of the second spring is adjusted by the adjusting screw to ensure that the lower surfaces of each upper suction plate are on the same plane in the initial position.

[0016] In one possible implementation, each of the wheel grooves has the same inclination angle, and all of them are consistent with the angle between the lower suction plate and the horizontal plane.

[0017] In a second aspect, the present invention also provides a method for extending the fracture distance of a flexible module battery cell, which extends the fracture distance based on the fracture extension device described in the first aspect, the method comprising:

[0018] S100. Place the battery cell to be broken on the lower suction plate of the lower suction plate assembly and fix it with adsorption;

[0019] S200 controls the pressing component to move above the suction plate component and presses the battery cells downward until each suction plate abuts against the corresponding lower limit block, so that the battery cells are distributed in a stepped manner.

[0020] S300, control the lower limit block to draw vacuum to hold the lower suction plate, and drive the linear module to move the lower pressing component away, so that the upper suction plate component reaches above the lower suction plate component;

[0021] S400, control the upper suction plate assembly to descend and adsorb the battery cell, while the lower suction plate breaks the vacuum;

[0022] The S500 controls the upper suction plate assembly to rise and drives the linear module to move, so as to place the battery cells onto the unloading platform.

[0023] This invention has at least the following technical effects:

[0024] The present invention provides a flexible module cell splitting and widening device and method. The lower suction plate assembly of the splitting and widening device includes two side plates spaced apart along a first direction and multiple lower suction plates. Multiple inclined grooves are provided on the side plates. The multiple grooves are symmetrically divided into two groups at the middle position of the side plates, and the inclination angle of the multiple grooves in each group is the same. The length of each group of grooves gradually increases from the side closer to the middle position to the side farther away from the middle position. When the pressing module and the lower suction plate assembly press down together, it performs stepped staggered splitting of large cells that have not been split after one pre-splitting, while any two adjacent small cells are also widened at equal intervals. This realizes that the two processes of splitting large cells into small cells and arranging small cells at equal intervals are completed on one device at the same time, simplifying the production process and improving production efficiency. It can also be applied to high-efficiency semi-automatic production, or combined with automatic loading and unloading equipment to achieve fully automated production, thereby achieving the goals of cost reduction, efficiency improvement and improved cell quality. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of a flexible module battery cell fracture propagation device provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a longitudinal and transverse fracture propagation device for a flexible module battery cell provided in an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the overall structure of the lower suction plate assembly provided in an embodiment of the present invention;

[0029] Figure 4 This is a partial cross-sectional structural diagram of the lower suction plate assembly provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the guide wheel and wheel groove of the lower suction plate assembly provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the pressure-down assembly provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the upper suction plate assembly provided in an embodiment of the present invention;

[0033] Figure 8 This is a comparative schematic diagram of the pressing component and the suction plate component before and after pressing together, provided in an embodiment of the present invention.

[0034] Figure 9 This is a schematic diagram of the cooperation between the pressing component and the suction plate component provided in an embodiment of the present invention (excluding the first spring).

[0035] Figure 10 This is a comparative schematic diagram of the battery cell before and after fracture propagation, provided in an embodiment of the present invention.

[0036] Figure 11 Provided for embodiments of the present invention Figure 10 A magnified view of part of I;

[0037] Figure 12 This is a schematic diagram showing the state changes of the upper suction plate assembly and the lower suction plate assembly before and after material picking up by the upper suction plate assembly, as provided in an embodiment of the present invention.

[0038] Figure 13 This is a flowchart of a method for extending the fracture distance of a flexible module battery cell, provided as an embodiment of the present invention.

[0039] In the picture:

[0040] 1-Support base plate; 2-Lower suction plate assembly; 3-Lower pressure assembly; 4-Unloading platform; 5-Upper suction plate assembly; 6-Connecting seat; 7-Linear module; 8-Column assembly; 9-Base plate; 10-Lower limit block; 11-Lower suction plate; 12-First air pipe connector; 13-Side plate; 13a-Wheel groove; 14-Guide wheel; 15-Guide wheel shaft; 16-Center suction plate; 17-First spring; 18-Connecting plate; 19-First lifting cylinder; 20-Adapter plate; 21-Mounting plate; 22-Bearing; 23-Lower pressure roller; 24-Bearing seat plate; 25-Second lifting cylinder; 26-Lifting cylinder mounting plate; 27-Heightened side plate; 28-Connecting base plate; 29-Upper suction plate; 30-Second air pipe connector; 31-Guide rod; 32-Linear bearing; 33-Second spring; 34-Adjusting screw. Detailed Implementation

[0041] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0043] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0044] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0046] like Figure 1 The diagram shown is a structural schematic of the flexible module cell splitting and widening device provided in an embodiment of the present invention. The splitting and widening device mainly includes: a support base plate 1, a lower suction plate assembly 2, a lower pressing assembly 3, a feeding platform 4, an upper suction plate assembly 5, a connecting seat 6, a linear module 7, and a column assembly 8.

[0047] Specifically, the lower suction plate assembly 2 and the unloading platform 4 are fixed on the supporting base plate 1. The lower end of the column assembly 8 is fixedly connected to the supporting base plate 1, and the upper end of the column assembly is a suspension structure (the suspension structure extends along the second direction to above the lower suction plate assembly 2 and the unloading platform 4). The linear module 7 is installed at the end of the suspension structure. The movable end (slider) of the linear module 7 is connected to the connecting seat 6 below, which facilitates driving the lower pressing assembly 3 and the upper suction plate assembly 5 to move along the first direction through the connecting seat 6. The corresponding lower suction plate assembly 2 and the unloading platform 4 below can be understood as being spaced apart along the first direction, which facilitates the direct adsorption of the split and expanded battery cells from the lower suction plate assembly 2 and the transfer to the unloading platform through the linear movement of the linear module 7. Here, the first direction can be understood as the length direction of the supporting base plate 1, and the second direction can be understood as the width direction of the supporting base plate 1.

[0048] Figure 2 The diagram shows a longitudinal splitting and expansion device on the left and a transverse splitting and expansion device on the right. Both have similar structures and operate on the same principle. The following description will focus solely on the longitudinal splitting and expansion device; the transverse device will not be elaborated upon. Furthermore, the transverse and longitudinal splitting and expansion devices can be arranged side-by-side or fixed to the same support base plate 1. A combination of different splitting and expansion devices can achieve a complete transverse and longitudinal splitting and expansion process for the battery cell. Optionally, for example, two identical splitting and expansion devices can be installed, one arranged transversely for transverse splitting and expansion, and the other arranged longitudinally for longitudinal splitting and expansion. The transverse and longitudinal linear modules are placed perpendicular to each other, allowing direct transfer from the transverse unloading platform to the longitudinal device for splitting and expansion.

[0049] Combination Figures 3 to 5 The diagram shown is a schematic diagram of a specific embodiment of the present invention. Figures 3 to 5 The lower suction plate assembly 2 shown in the diagram includes: a base plate 9, a lower limit block 10, a lower suction plate 11, a first air pipe connector 12, a side plate 13, a guide wheel 14, a guide wheel shaft 15, a center suction plate 16, a first spring 17, and a connecting plate 18.

[0050] Specifically, the lower limit block 10, side plate 13, and connecting plate 18 are all fixedly mounted on the base plate 9. First air pipe connectors 12 are installed on both sides of the lower limit block 10, lower suction plate 11, and central suction plate 16. The first air pipe connectors 12 are connected to a vacuum generator via air pipes to achieve vacuum breaking of the lower limit block 10, lower suction plate 11, and central suction plate 16. The central suction plate 16 is connected and fixed to the two side plates 13. The lower suction plate 11 engages with the wheel grooves 13a on the side plates 13 via guide wheel shafts 15 and guide wheels 14, and can slide obliquely within the wheel grooves 13a. The multiple wheel grooves 13a on the side plates 13 are divided into two groups and are symmetrically arranged about the central suction plate 16, all at an angle. The length of the wheel grooves 13a gradually increases from the side closer to the central suction plate 16 to the side farther away from the central suction plate 16 to ensure the consistency of the final expansion distance between different rows or columns. It should be noted that the tilt angle of each wheel groove 13a is consistent and the angle between the lower suction plate 11 and the horizontal plane is consistent. As long as the tilt angle of the wheel groove 13a is consistent with the angle between the lower suction plate 11 and the horizontal plane, the guide wheel 14 will not get stuck.

[0051] The centers of the upper edges of the grooves 13a on the side plate 13 are on the same horizontal plane. After the lower suction plate assembly 2 is assembled, the first spring 17 has a certain pre-compression amount. The first spring 17 pushes the lower suction plate 11 against the upper edge of the groove 13a to ensure that the upper surfaces of each lower suction plate 11 are on the same plane initially, thereby ensuring that the battery cells are placed flat in the initial state. When the lower pressing assembly 3 presses down, the lower suction plate 11 moves down through the guide of the groove 13a until the bottom surface of the lower suction plate 11 is in contact with the top surface of the lower limit block 10. The lower limit block 10 draws a vacuum, holding the lower suction plate 11 in place. At this time, the first spring 17 is compressed. When the upper suction plate assembly 5 removes the battery cells from the lower suction plate assembly 2, the lower limit block 10 breaks the vacuum, and the compressed first spring 17 gradually returns to its original state, resetting the lower suction plate 11.

[0052] like Figure 6 The diagram shown is a schematic diagram of a specific embodiment of the present invention. Figure 6 The pressing assembly 3 includes: a first lifting cylinder 19, an adapter plate 20, a mounting plate 21, bearings 22, a pressing roller 23, and bearing seat plates 24. The mounting plate 21 and the two bearing seat plates 24 form the basic frame of the pressing assembly 3. The pressing roller 23 is mounted to the bearing seat plates 24 via bearings 22 at both ends. The pressing roller 23 is correspondingly positioned with the lower suction plate 11, facilitating the pressing of small battery cells on the lower suction plate 11 during pressing. The adapter plate 20 is used to fix the movable end of the first lifting cylinder 19 to the upper surface of the mounting plate 21, thus facilitating the installation and removal of the first lifting cylinder 19 and the adjustment of the pressing assembly 3. The first lifting cylinder 19 provides power to achieve the pressing and lifting of the pressing roller 23.

[0053] like Figure 7 The diagram shown is a schematic diagram of a specific embodiment of the present invention. Figure 7 The upper suction plate assembly 5 shown in the diagram includes: a second lifting cylinder 25, a lifting cylinder mounting plate 26, a heightening side plate 27, a connecting base plate 28, an upper suction plate 29, a second air pipe connector 30, a guide rod 31, a linear bearing 32, a second spring 33, and an adjusting screw 34.

[0054] Specifically, the lifting cylinder mounting plate 26, the heightening side plate 27, and the connecting base plate 28 form the basic frame of the upper suction plate assembly 5. The second lifting cylinder 25 is connected to the linear module 7 through the connecting seat 6, and the second lifting cylinder 25 moves as a whole along the first direction under the drive of the linear module 7.

[0055] The free end of the second lifting cylinder 25 (the end of the telescopic push rod away from the piston) is fixedly connected to the lifting cylinder mounting plate 26, providing lifting power for the entire upper suction plate assembly 5, thereby enabling the upper suction plate 29 to descend to pick up materials and lift. A second air pipe connector 30 is installed on the upper suction plate 29, which is connected to a vacuum generator via an air pipe. When the upper suction plate 29 descends to pick up materials, it draws a vacuum to adsorb the battery cells; when the upper suction plate 29 descends to release materials, it breaks the vacuum, placing the battery cells in a preset position (on the unloading platform 4). A guide rod 31 is connected to the upper suction plate 29 and can slide within the linear bearing 32, guiding the lifting and lowering of the upper suction plate 29. The adjusting screw 34 is used to adjust the initial position of the upper suction plate 29. A second spring 33 is fitted onto the adjusting screw 34 located between the upper suction plate 29 and the connecting base plate 28. The extension and retraction length of the second spring is adjusted by the adjusting screw 34 to ensure that the lower surfaces of all upper suction plates 29 are on the same plane in the initial position, thereby ensuring that all positions of the battery cells are on the same horizontal plane and avoiding the problem of inconsistent height affecting the expansion effect. The second spring 33 has a certain buffering effect on the upper suction plate 29. At the same time, the flexible connection between the second spring 33 and the adjusting screw 34 allows for quick adjustment of the height of the upper suction plate 29, which is more flexible than a rigid connection. When the upper suction plate 29 descends to pick up materials, the second spring 33 is compressed; after the upper suction plate 29 rises, the second spring 33 returns to its original shape, and the lower surfaces of all upper suction plates 29 return to the same plane.

[0056] The following describes the breaking and spreading process of the aforementioned breaking and spreading device:

[0057] This fracture-expanding device mainly consists of a supporting base plate 1, a lower suction plate assembly 2, a lower pressing assembly 3, a feeding platform 4, an upper suction plate assembly 5, a connecting seat 6, a linear module 7, and a column assembly 8. The lower suction plate assembly 2, the feeding platform 4, and the column assembly 8 are installed on the supporting base plate 1. The connecting seat 6 is installed on the slide of the linear module 7. The lower pressing assembly 3 and the upper suction plate assembly 5 are both installed on the connecting seat 6. The assembly consisting of the lower pressing assembly 3, the upper suction plate assembly 5, the connecting seat 6, and the linear module 7 is hoisted onto the column assembly 8.

[0058] A large battery cell that has not been broken after one pre-cracking is placed on the suction plate plane (the plane formed by multiple lower suction plates 11 laid flat) of the lower suction plate assembly 2. The lower suction plates 11 draw in a vacuum to hold the large battery cell. The lower pressing assembly 3 moves above the lower suction plate assembly 2, and the first lifting cylinder 19 actuates to drive the lower pressing roller 23 to descend, contact the battery cell, and continue to press down until the bottom surface of the lower suction plate 11 is in contact with the top surface of the lower limit block 10. At this time, the first spring 17 of the lower suction plate assembly 2 is compressed. Since the lower pressing rollers 23 are distributed in a stepped manner at different heights, and the top surfaces of the lower limit blocks 10 that are in contact with the bottom surface of the lower suction plate 11 are also distributed in a stepped manner, after the pressing action is completed, the large battery cell is broken into small strips of battery cells, and each strip of battery cell is carried by the lower suction plate 11 in a stepped manner (e.g., Figure 8 As shown in the figure), a schematic diagram of the structure of the lower suction plate 11 and the lower limit block 10 in cooperation is shown in the figure. Figure 9 As shown ( Figure 9 The first spring 17 is hidden in the middle.

[0059] During the pressing process, each suction plate 11 does not move straight up and down, but moves obliquely at the same angle (moving synchronously along the direction of the groove 13a, but the movable distance of the suction plate 11 along the groove 13a gradually increases from the central suction plate 16 near the middle to both sides, thus forming a stepped distribution). Therefore, while the battery cell is broken and descends with the suction plate 11, there is also a horizontal component movement, that is, adjacent battery cells are expanded. Since each suction plate 11 is limited by the corresponding top surface of the lower limit block 10 after pressing, and the height difference between any two adjacent top surfaces of the lower limit block 10 is equal, the height difference formed by any two adjacent suction plates 11 after being pressed is also equal, that is, the height difference of any two adjacent suction plates 11 descending is equal. Since each suction plate 11 moves at the same angle, when the height difference of any two adjacent suction plates 11 descending is equal, the difference in their horizontal component movement distance is also the same, that is, the expansion action is equal-interval expansion (e.g., Figure 10 and Figure 11 (As shown).

[0060] After the lower pressure roller 23 presses down into place and the battery cells are expanded at equal intervals, the lower limit block 10 draws in a vacuum, holding the lower suction plate 11 in place. Since the lower pressure assembly 3 and the upper suction plate assembly 5 are mounted on the same connecting seat, the upper suction plate assembly 5 can reach above the lower suction plate assembly 2 at the same time that the lower pressure assembly 3 rises into place and moves away under the action of the linear module 7. The second lifting cylinder 25 of the upper suction plate assembly 5 is activated, and the upper suction plates 29 descend until each upper suction plate 29 contacts the battery cells. At this time, the second spring 33 of the upper suction plate assembly is compressed. Since the battery cells are distributed at different heights at this time, the upper suction plates 29 are also distributed at different heights. The lower suction plate 11 breaks the vacuum, the upper suction plate 29 draws in a vacuum, the second lifting cylinder 25 is activated, and the upper suction plate 29 lifts the battery cells; during the ascent, the compressed second spring 33 gradually returns to its original state, and the upper suction plates 29, which are distributed at different heights, gradually return to the same plane, that is, the battery cells are lifted and return to the same plane. Because the upper suction plate 29 moves vertically upwards or downwards during the material handling process, the original spacing between each solar cell remains unchanged after material handling. The upper suction plate assembly 5, through horizontal movement, descent, and vacuum breaking, places the solar cells onto the unloading platform 4 or subsequent docking equipment for the next process. The lower limit block 10 of the lower suction plate assembly 2 breaks the vacuum, the compressed first spring 17 gradually returns to its original state, and the lower suction plates gradually return to their initial positions (the upper surfaces of each lower suction plate return to the same plane), awaiting the loading of the next solar cell. The decomposition of the actions of the upper suction plate assembly 5 before and after material handling is as follows: Figure 12 Serial number As shown, the specific process will not be described in detail.

[0061] Based on the same inventive concept, such as Figure 13 As shown, the present invention provides a method for extending the fracture distance of a flexible module battery cell, which is applied to the fracture extension device in the aforementioned embodiment to extend the fracture distance. The method includes the following steps:

[0062] S100. Place the battery cell to be broken on the lower suction plate of the lower suction plate assembly and fix it with adsorption.

[0063] S200 controls the pressing component to move above the suction plate component and presses the battery cells downward until each suction plate abuts against the corresponding lower limit block, so that the battery cells are distributed in a stepped manner.

[0064] S300, control the lower limit block to draw in vacuum to hold the lower suction plate, and drive the linear module to move the lower pressure assembly away, so that the upper suction plate assembly reaches above the lower suction plate assembly.

[0065] S400, control the upper suction plate assembly to descend and adsorb the battery cell, while the lower suction plate breaks the vacuum.

[0066] The S500 controls the upper suction plate assembly to rise and drives the linear module to move, so as to place the battery cells onto the unloading platform.

[0067] The present invention provides a flexible module cell splitting and widening device and method. The lower suction plate assembly of the splitting and widening device includes two side plates spaced apart along a first direction and multiple lower suction plates. Multiple inclined grooves are provided on the side plates. The multiple grooves are symmetrically divided into two groups at the middle position of the side plates, and the inclination angle of the multiple grooves in each group is the same. The length of each group of grooves gradually increases from the side closer to the middle position to the side farther away from the middle position. When the pressing module and the lower suction plate assembly press down together, it performs stepped staggered splitting of large cells that have not been split after one pre-splitting, while any two adjacent small cells are also widened at equal intervals. This realizes that the two processes of splitting large cells into small cells and arranging small cells at equal intervals are completed on one device at the same time, simplifying the production process and improving production efficiency. It can also be applied to high-efficiency semi-automatic production, or combined with automatic loading and unloading equipment to achieve fully automated production, thereby achieving the goals of cost reduction, efficiency improvement and improved cell quality.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of this specification, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible module solar cell fracture propagation device, wherein the protective layer and silicon wafer of the solar cell are provided with mutually aligned scratches, characterized in that, The fracture propagation device includes: Support base plate; The column assembly and the pressing assembly are provided. The lower end of the column assembly is fixed to the support base plate, and the upper end is fixed with a linear module that can move along a first direction. The pressing assembly is connected to the movable end of the linear module. The first direction is the length direction of the support base plate. The lower suction plate assembly, mounted on the supporting base plate, includes two side plates spaced apart along a first direction and multiple lower suction plates. The side plates are provided with multiple inclined grooves, which are symmetrically divided into two groups around the middle position of the side plates. The inclination angle of the grooves in each group is the same. The length of each group of grooves gradually increases from the side closer to the middle position to the side farther from the middle position, and the upper center of each groove is located on the same horizontal plane. The two ends of each lower suction plate respectively engage with the grooves on the side plates. When the pressing assembly engages with the lower suction plate assembly, it presses down the multiple lower suction plates corresponding to the two groups of grooves into a stepped distribution, so that the battery cells placed on the lower suction plates simultaneously break and expand at equal intervals. The lower suction plate assembly further includes: a guide wheel and a guide wheel shaft. The lower suction plate engages with the wheel groove on the side plate through the guide wheel shaft and the guide wheel, and can slide obliquely within the wheel groove. The lower pressing assembly includes: a lower pressing roller. The lower pressing roller is arranged in a one-to-one correspondence with the lower suction plate, and is used to press the corresponding plurality of lower suction plates into a stepped distribution.

2. The flexible module cell fracture propagation device according to claim 1, characterized in that, The lower suction plate assembly also includes: a base plate, a lower limiting block, a first air pipe connector, a first spring, and a connecting plate; The lower limit block, side plate, and connecting plate are all fixed on the base plate. The lower limit block, lower suction plate, and center suction plate are each equipped with a first air pipe connector. The first air pipe connector is connected to the vacuum generator through an air pipe to achieve vacuum breaking of the lower limit block, lower suction plate, and center suction plate.

3. The flexible module cell fracture propagation device according to claim 2, characterized in that, The lower suction plate assembly further includes a central suction plate, the two ends of which are respectively connected to the two side plates, thereby dividing the plurality of lower suction plates into two groups corresponding to the wheel groove.

4. The flexible module cell fracture propagation device according to claim 2, characterized in that, The pressing assembly also includes: a first lifting cylinder, an adapter plate, a mounting plate, a bearing, and a bearing seat plate; The first lifting cylinder is connected to the movable end of the linear module via a connecting seat. The adapter plate connects the movable end of the first lifting cylinder to the mounting plate. The two bearing seat plates are spaced apart along the first direction and are respectively connected to the bottom of the mounting plate. The lower pressure rollers are respectively connected to the bearing seat plates via the bearings.

5. The flexible module cell fracture propagation device according to claim 4, characterized in that, The plurality of lower pressure rollers are symmetrically divided into two groups with respect to the center position of the bearing seat plate. The distance from the axis of each lower pressure roller to the mounting plate increases sequentially from the center position of the bearing seat plate to both sides.

6. The flexible module cell fracture propagation device according to claim 4, characterized in that, Also includes: The unloading platform and the upper suction plate assembly; The unloading platform is mounted on the support base plate and is arranged on one side of the lower suction plate assembly along the first direction. The upper suction plate assembly is connected to the movable end of the linear module through the connecting seat. The upper suction plate assembly is used to adsorb and transport the broken and expanded battery cells to the unloading platform.

7. The flexible module cell fracture propagation device according to claim 6, characterized in that, The upper suction plate assembly includes: a second lifting cylinder, a lifting cylinder mounting plate, a heightening side plate, a connecting base plate, an upper suction plate, and a second air pipe connector; The lifting cylinder mounting plate, the heightening side plate, and the connecting base plate form the basic frame of the upper suction plate assembly. The second lifting cylinder is connected to the movable end of the linear module through the connecting seat. The lower end of the second lifting cylinder is fixedly connected to the lifting cylinder mounting plate. The upper suction plate is equipped with the second air pipe connector, which is used to connect to the vacuum generating device through an air pipe, so as to realize the picking and placing of the battery cell through vacuum adsorption.

8. The flexible module cell fracture propagation device according to claim 7, characterized in that, The upper suction plate assembly also includes: a guide rod, a linear bearing, a second spring, and an adjusting screw; The lower end of the guide rod is connected to the upper surface of the upper suction plate, and the upper end of the guide rod passes through the connecting base plate and the linear bearing located at the bottom of the connecting base plate, for guiding the lifting and lowering of the upper suction plate; The adjusting screw is used to adjust the initial position of the upper suction plate. A second spring is sleeved on the adjusting screw located between the upper suction plate and the connecting base plate. The adjustment screw is used to adjust the extension length of the second spring to ensure that the lower surfaces of each upper suction plate are on the same plane in the initial position.

9. The flexible module cell fracture propagation device according to claim 6, characterized in that, The unloading platform includes: each of the wheel grooves has the same inclination angle, and all of them have the same angle with the lower suction plate relative to the horizontal plane.

10. A method for propagating the fracture of a flexible module battery cell, characterized in that, Based on the fracture propagation device as described in claim 6, the fracture propagation method includes: S100. Place the battery cell to be broken on the lower suction plate of the lower suction plate assembly and fix it with adsorption; S200 controls the pressing component to move above the suction plate component and presses the battery cells downward until each suction plate abuts against the corresponding lower limit block, so that the battery cells are distributed in a stepped manner. S300, control the lower limit block to draw vacuum to hold the lower suction plate, and drive the linear module to move the lower pressing component away, so that the upper suction plate component reaches above the lower suction plate component; S400, control the upper suction plate assembly to descend and adsorb the battery cell, while the lower suction plate breaks the vacuum; The S500 controls the upper suction plate assembly to rise and drives the linear module to move, so as to place the battery cells onto the unloading platform.

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