Battery cell flip mechanism

Abstract

The present invention relates to the field of lithium battery processing technology, and in particular to a cell flipping mechanism for lithium battery production, comprising a flipping mechanism and a pushing mechanism for pushing the cell arranged on the side of the flipping mechanism, the flipping mechanism comprising a rebound roller assembly for clamping the cell, a pressing cylinder assembly for driving the rebound roller assembly to clamp the cell, and a flipping drive cylinder for driving the rebound roller assembly to flip, and the pushing mechanism comprising a first-level pushing cylinder, a second-level pushing cylinder and a pushing cylinder. The present invention is provided with a flipping mechanism, which solves the problem of the collapse of the cell tab due to gravity in the first circle of the cell diaphragm through a 180° flipping mechanism, thereby improving the cell yield; at the same time, the flipping platform adopts an automatic rebound low-resistance roller structure design, which prevents friction and scratches on the cell surface when the cell passes through the flipping platform.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery processing, and in particular to a battery cell turning mechanism for lithium battery production. Background Art

[0002] Lithium batteries are batteries that use lithium metal or lithium alloy as anode materials and non-aqueous electrolyte solutions. The difference between lithium batteries and lithium-ion batteries is that the former is a primary battery and the latter is a rechargeable battery. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements, so lithium batteries have not been used for a long time. With the development of microelectronics technology at the end of the 20th century, the number of miniaturized devices has increased, and high requirements have been placed on power sources. Lithium batteries have entered a large-scale practical stage.

[0003] At present, in the lithium battery manufacturing industry, the battery cell can only be unloaded at the 0° position after winding, that is, the battery cell tab is under the battery cell after winding, and then enter the post-process. However, when the lithium battery cell is unloaded at the 0° position after winding, if the first circle of diaphragm is just above the inner circle, the first circle of diaphragm will sag and wrinkle under the action of gravity, resulting in defective batteries, and the single 0° position cannot meet the needs of battery cell technology. Summary of the invention

[0004] Based on this, it is necessary to provide a cell flipping mechanism for lithium battery production to address the technical problem that the position of the cell after winding causes the cell to wrinkle and produce defects.

[0005] A battery cell flipping mechanism for lithium battery production, the battery cell flipping mechanism comprising a flipping mechanism and a pushing mechanism arranged on the side of the flipping mechanism for pushing the battery cell;

[0006] The flipping mechanism includes a rebound roller assembly for clamping the battery core, a pressing cylinder assembly for driving the rebound roller assembly to clamp the battery core, and a flipping drive cylinder for driving the rebound roller assembly to flip;

[0007] The pushing mechanism includes a first-level pushing cylinder, a second-level pushing cylinder and a pushing cylinder. The first-level pushing cylinder is arranged on the side of the second-level pushing cylinder. The first-level pushing cylinder and the second-level pushing cylinder are arranged at the end of the piston rod of the pushing cylinder. The first-level pushing cylinder is used to push the battery cell into the rebound roller assembly. When the flip driving cylinder drives the rebound roller assembly to flip, the second-level pushing cylinder pushes the battery cell out of the rebound roller assembly.

[0008] As a further solution of the invention: the rebound roller type assembly includes an upper rebound roller type turning platform and a lower rebound roller type turning platform which can move toward each other and clamp the battery core together.

[0009] As a further solution of the invention: guide column fixing blocks are fixedly installed on both sides of the lower rebound roller type turning platform, and guide columns that slide up and down in cooperation with the upper rebound roller type turning platform are provided on the guide column fixing blocks.

[0010] As a further solution of the invention: the flipping mechanism also includes two fixed support plates, a flipping drive assembly and a bottom support plate, the two fixed support plates are respectively fixed on both sides of the bottom support plate; the flipping drive assembly is arranged on the outside of one of the fixed support plates, and the flipping drive cylinder is arranged on the side of the flipping drive assembly and is connected to the driving part on the flipping drive assembly.

[0011] As a further solution of the invention: a rotating shaft is respectively installed on the two fixed support plates, and the rotating shaft is connected to a driving member of the flip driving assembly, and the flip driving assembly is used to drive the rotating shaft to rotate.

[0012] As a further scheme of the invention: the two rotating shafts are respectively installed with connecting blocks connected to the two ends of the lower rebound roller type turning platform; the pressing cylinder assemblies are respectively arranged on the sides of the two connecting blocks, the piston connecting rods in the two pressing cylinder assemblies are respectively connected to the two ends of the upper rebound roller type turning platform, the piston connecting rod in the pressing cylinder assembly is telescopically connected to the upper rebound roller type turning platform to realize the mutual pressing of the upper rebound roller type turning platform and the lower rebound roller type turning platform, and the connecting block is connected to the rotating shaft to realize the flipping of the rebound roller type assembly connected to the rotating shaft.

[0013] As a further solution of the invention: the pressing cylinder assembly is provided with a solenoid valve, the flipping mechanism is provided with a first sensing device for sensing the battery cell, the first sensing device is electrically connected to the solenoid valve, and the solenoid valve is used to control the extension and retraction of the piston connecting rod of the pressing cylinder assembly.

[0014] As a further solution of the invention: the pushing mechanism is provided with two vertical support columns and a cross-beam support column, wherein the cross-beam support column is fixedly installed on the top of the two vertical support columns, the pushing cylinder is vertically fixed on the cross-beam support column, the end of the piston rod in the pushing cylinder is horizontally provided with a pushing base plate, and the first-stage pushing cylinder and the second-stage pushing cylinder are arranged on the pushing base plate.

[0015] As a further solution of the invention: a second sensing device is provided on the side wall of the first-stage pushing cylinder, which is electrically connected to the electromagnetic switch of the first-stage pushing cylinder and is used to sense the battery cell; a third sensing device is provided on the side wall of the second-stage pushing cylinder close to one end of the first-stage pushing cylinder, which is electrically connected to the electromagnetic switch of the second-stage pushing cylinder; and a fourth sensing device is provided on the side wall of the pushing cylinder, which is electrically connected to the electromagnetic switch of the pushing cylinder.

[0016] The battery cell flipping mechanism of the present invention is implemented by setting a flipping mechanism and a pushing mechanism, utilizing the rebound roller type assembly in the flipping mechanism to clamp the battery cell, pushing the battery cell through the first-stage pushing cylinder and the second-stage pushing cylinder in the pushing mechanism, and then flipping the battery cell 180° through the flipping mechanism, thereby solving the problem of collapse of the battery cell tab due to gravity in the first circle of the battery cell diaphragm, and improving the battery cell yield; at the same time, the flipping platform adopts an automatic rebound low-resistance roller structure design, which protects the surface of the battery cell from friction and scratches when the battery cell passes through the flipping platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the battery cell flipping mechanism of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the upper rebound roller type turning platform of the present invention.

[0020] Figure 3 It is a schematic diagram of the matching structure of the upper rebound roller type turning platform and the pressing cylinder assembly of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the turning mechanism of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the pushing mechanism of the present invention. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the invention, not all of them. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0024] See also Figures 1 to 5 The present invention provides a cell flipping mechanism for lithium battery production, the cell flipping mechanism comprising a flipping mechanism 1 and a pushing mechanism 2 for pushing the cell and arranged on the side of the flipping mechanism 1; the flipping mechanism 1 comprises a rebound roller assembly 3 for clamping the cell, a pressing cylinder assembly 13 for driving the rebound roller assembly 3 to clamp the cell, and a flipping driving cylinder 15 for driving the rebound roller assembly 3 to flip; the pushing mechanism 2 is provided with a first-level pushing cylinder 22, a second-level pushing cylinder 20 and a pushing cylinder 24, the first-level pushing cylinder 22 is arranged on the side of the second-level pushing cylinder 20, the first-level pushing cylinder 22 and the second-level pushing cylinder 20 are arranged at the end of the piston rod of the pushing cylinder 24, the first-level pushing cylinder 22 is used to push the cell into the rebound roller assembly 3, when the flipping driving cylinder 15 drives the rebound roller assembly 3 to flip, the second-level pushing cylinder 20 pushes the cell out of the rebound roller assembly 3.

[0025] The battery cell flipping mechanism of the present invention is implemented by setting a flipping mechanism 1 and a pushing mechanism 2, using the rebound roller assembly 3 in the flipping mechanism 1 to clamp, pushing the battery cell through the first-stage pushing cylinder 22 and the second-stage pushing cylinder 20 in the pushing mechanism 2, and then flipping it 180° through the flipping mechanism 1, thereby solving the problem of the battery cell tab collapsing due to gravity in the first circle of the battery cell diaphragm, thereby improving the battery cell yield; at the same time, the flipping platform adopts an automatic rebound low-resistance roller structure design, which prevents the surface of the battery cell from being scratched by friction when the battery cell passes through the flipping platform.

[0026] The rebound roller assembly 3 is used to clamp the battery cell to prevent the battery cell from falling when the rebound roller assembly 3 is turned over by the turning drive cylinder 15. Figures 2 to 4 The rebound roller assembly 3 includes an upper rebound roller turning platform 30 and a lower rebound roller turning platform 31 which can move toward each other and clamp the battery cell together. Guide column fixing blocks are fixedly installed on both sides of the lower rebound roller turning platform 31. A guide column 310 is provided on the guide column fixing block, which slides up and down in cooperation with the upper rebound roller turning platform 30 to ensure that the upper rebound roller turning platform 30 and the lower rebound roller turning platform 31 are clamped with each other, thereby preventing friction and scratches on the surface of the battery cell.

[0027] Preferably, in order to realize the mutual clamping and flipping of the battery cells between the upper rebound roller type flipping platform 30 and the lower rebound roller type flipping platform 31, the flipping mechanism 1 also includes two fixed support plates 11, a flipping drive assembly 14, and a bottom support plate 10, and the two fixed support plates 11 are respectively fixed on both sides of the bottom support plate 10; the flipping drive assembly 14 is arranged on the outside of one of the fixed support plates 11, and the flipping drive cylinder 15 is arranged on the side of the flipping drive assembly 14 and is connected to the driving member on the flipping drive assembly 14; the two fixed support plates 11 are respectively installed with rotating shafts 110, and the rotating shafts 110 are connected to the driving member of the flipping drive assembly 14, and the flipping drive assembly 14 is used to drive the rotating shaft 110 to rotate. More preferably, the two rotating shafts 110 are respectively installed with connecting blocks 12 connected to the two ends of the lower rebound roller type turning platform 31, and the two ends of the lower rebound roller type turning platform 31 are fixed to the connecting blocks 12; the sides of the two connecting blocks 12 are respectively provided with pressing cylinder assemblies 13, and the piston connecting rods in the two pressing cylinder assemblies 13 are respectively connected to the two ends of the upper rebound roller type turning platform 30. The piston connecting rod in the pressing cylinder assembly 13 is telescopically connected to the upper rebound roller type flipping platform 30 to realize the mutual pressing of the upper rebound roller type flipping platform 30 and the lower rebound roller type flipping platform 31, and the rotating shaft 110 is connected through the connecting block 12 to realize the flipping of the rebound roller type assembly 3 connected to the rotating shaft 110. A solenoid valve is provided on the pressing cylinder assembly 13, and a first sensing device for sensing the battery cell is provided on the flipping mechanism 1. The first sensing device is electrically connected to the solenoid valve. The solenoid valve is used to control the extension and retraction of the piston connecting rod 131 of the pressing cylinder assembly 13. The solenoid valve is provided to control the extension and retraction of the piston connecting rod 131 of the pressing cylinder assembly 13 to improve work efficiency.

[0028] The pushing mechanism 2 is used to push the battery cells to improve work efficiency. Figure 5The pushing mechanism 2 is provided with two vertical support columns 26 and a crossbeam support column 25, wherein the two vertical support columns 26 are installed on the conveying platform of the battery cell winding device, the crossbeam support column 25 is fixedly installed on the top of the two vertical support columns 26, the pushing cylinder 24 is vertically fixed on the crossbeam support column 25, the end of the piston rod in the pushing cylinder 24 is horizontally provided with a pushing bottom plate 23, and the first-stage pushing cylinder 22 and the second-stage pushing cylinder 20 are arranged on the pushing bottom plate 23. Among them, the side wall of the first-stage pushing cylinder 22 is provided with a second sensing device electrically connected to the electromagnetic switch of the first-stage pushing cylinder 22 and used for sensing the battery cell, the side wall of the second-stage pushing cylinder 20 close to one end of the first-stage pushing cylinder 22 is provided with a third sensing device 21 electrically connected to the electromagnetic switch of the second-stage pushing cylinder 20, and the side wall of the pushing cylinder 24 is provided with a fourth sensing device electrically connected to the electromagnetic switch of the pushing cylinder 24. When the battery cell needs to be pushed to the position of the flipping mechanism 1, the pushing cylinder 24 pushes the first-level pushing cylinder 22 and the second-level pushing cylinder 20 downward, and the second sensing device senses the battery cell, and the electromagnetic switch of the first-level pushing cylinder 22 electrically connected thereto is started, driving the first-level pushing cylinder 22 to move and push the battery cell into the rebound roller assembly 3, and the first-level pushing cylinder 22 retreats, the pressing cylinder assembly 13 is pressed, and the flipping mechanism 1 flips the battery cell 180 degrees; at this time, the third sensing device 21 senses the battery cell, and the electromagnetic switch of the second-level pushing cylinder 20 electrically connected thereto is started, driving the second-level pushing cylinder 20 to push the flipped battery cell out of the rebound roller assembly 3, thereby solving the problem of the battery cell pole ear collapsing due to gravity in the first circle of the battery cell diaphragm, thereby improving the battery cell yield.

[0029] When the battery cell on the battery cell winding device is transported to the side of the entrance of the rebound roller assembly 3 of the flip mechanism 1 through the conveyor, the push cylinder 24 on the push mechanism 2 is driven downward, and the push cylinder 24 moves downward to drive the first-stage push cylinder 22 and the second-stage push cylinder 20 to move downward. When the fourth sensing device on the side of the push cylinder 24 senses in place, the push cylinder 24 stops moving downward. At this time, the second sensing device senses the battery cell, and the electromagnetic switch of the first-stage push cylinder 22 electrically connected to it is started, driving the first-stage push cylinder 22 to push the battery cell into the rebound roller assembly 3. After the first-stage push cylinder 22 is pushed, it retreats. At this time, the first sensing device on the flip mechanism 1 senses the battery cell, and the signal of the first sensing device is fed back to the electromagnetic valve, which controls the piston connecting rod 131 on the pressing cylinder assembly 13 to shrink, so that the upper rebound roller flip platform 30 is pressed against the lower rebound roller flip platform 31, and the battery cell is clamped between the upper rebound roller flip platform 30 and the lower rebound roller flip platform 31. Then the flip driving cylinder 15 is driven to drive the driving member on the flip driving assembly 14 to rotate, and the driving member drives the rotating shaft 110 on the fixed support plate 11 to rotate. Since the lower rebound roller type flipping platform 31 and the pressing cylinder assembly 13 are arranged on the connecting block 12 of the rotating shaft 110, when the rotating shaft 110 rotates, the rotating shaft 110 drives the upper rebound roller type flipping platform 30 and the lower rebound roller type flipping platform 31 with the battery cells clamped therein to flip. When the rebound roller assembly 3 flips 180 degrees, the solenoid valve controls the piston connecting rod 131 on the pressing cylinder assembly 13 to extend, so that the upper rebound roller flipping platform 30 and the lower rebound roller flipping platform 31 are separated. At this time, the third sensing device 21 senses the battery cell, and the electromagnetic switch of the secondary pushing cylinder 20 electrically connected thereto is started, driving the secondary pushing cylinder 20 to push out the battery cell in the rebound roller assembly 3. After the battery cell is pushed out, the secondary pushing cylinder 20 retreats, and the pushing cylinder 24 retreats, waiting for the next cycle action. At this time, one pushing and feeding is completed.

[0030] Compared with the prior art, the present invention is provided with a flipping mechanism 1 and a pushing mechanism 2, and utilizes the rebound roller assembly 3 in the flipping mechanism 1 to clamp, and pushes the battery cell through the first-stage pushing cylinder 22 and the second-stage pushing cylinder 20 in the pushing mechanism 2, and then flips 180 degrees through the flipping mechanism 1, thereby solving the problem of the battery cell collapsing due to the first circle of the battery cell diaphragm falling due to gravity, thereby improving the battery cell yield; at the same time, the flipping platform adopts a self-rebounding low-resistance roller structure design, which protects the surface of the battery cell from friction and scratches when the battery cell passes through the flipping platform.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A cell flipping mechanism, characterized in that: It comprises a turning mechanism (1) and a pushing mechanism (2) arranged on the side of the turning mechanism (1) and used for pushing the battery cell; The flipping mechanism (1) comprises a rebound roller assembly (3) for clamping the battery core, a pressing cylinder assembly (13) for driving the rebound roller assembly (3) to clamp the battery core, and a flipping drive cylinder (15) for driving the rebound roller assembly (3) to flip. The flipping mechanism (1) also comprises two fixed support plates (11), a flipping drive assembly (14) and a bottom support plate (10). The two fixed support plates (11) are respectively fixed to two sides of the bottom support plate (10); the flipping drive assembly (14) is arranged on the outside of one of the fixed support plates (11); and the flipping drive cylinder (15) is arranged on the outside of the fixed support plates (11). The turning mechanism (1) is provided with a first sensing device for sensing the battery core, the first sensing device is electrically connected to the first sensing device, and the first sensing device is electrically connected to the first sensing device. The ... The pushing mechanism (2) is provided with a first-stage pushing cylinder (22), a second-stage pushing cylinder (20) and a pushing cylinder (24); the first-stage pushing cylinder (22) is arranged on the side of the second-stage pushing cylinder (20); the first-stage pushing cylinder (22) and the second-stage pushing cylinder (20) are arranged at the ends of the piston rods of the pushing cylinder (24); the first-stage pushing cylinder (22) is used to push the battery core into the rebound roller assembly (3); when the flip driving cylinder (15) drives the rebound roller assembly (3) to flip, the second-stage pushing cylinder (20) pushes the battery core out of the rebound roller assembly (3); The rebound roller assembly (3) comprises an upper rebound roller flip platform (30) and a lower rebound roller flip platform (31) which can move towards each other and clamp the battery core together, guide column fixing blocks are fixedly installed on both sides of the lower rebound roller flip platform (31), and guide columns (310) are provided on the guide column fixing blocks and are slidable up and down in cooperation with the upper rebound roller flip platform (30).

2. The battery cell flipping mechanism according to claim 1, characterized in that: The two rotating shafts (110) are respectively provided with connecting blocks (12) connected to the two ends of the lower rebound roller type turning platform (31); the pressing cylinder assemblies (13) are respectively arranged on the sides of the two connecting blocks (12); the piston connecting rods in the two pressing cylinder assemblies (13) are respectively connected to the two ends of the upper rebound roller type turning platform (30); the piston connecting rods in the pressing cylinder assemblies (13) are telescopically connected to the upper rebound roller type turning platform (30) to realize mutual pressing of the upper rebound roller type turning platform (30) and the lower rebound roller type turning platform (31); the connecting blocks (12) are connected to the rotating shafts (110) to turn over the rebound roller type assembly (3).

3. The battery cell flipping mechanism according to claim 1, characterized in that: The pushing mechanism (2) comprises two vertical support columns (26) and a crossbeam support column (25), wherein the crossbeam support column (25) is fixedly mounted on the top of the two vertical support columns (26), the pushing cylinder (24) is vertically fixed on the crossbeam support column (25), a pushing base plate (23) is horizontally arranged at the end of the piston rod in the pushing cylinder (24), and the first-stage pushing cylinder (22) and the second-stage pushing cylinder (20) are arranged on the pushing base plate (23).

4. The battery cell flipping mechanism according to claim 1, characterized in that: The side wall of the first-stage pushing cylinder (22) is provided with a second sensing device which is electrically connected to the electromagnetic switch of the first-stage pushing cylinder (22) and is used to sense the battery cell; the side wall of the second-stage pushing cylinder (20) close to one end of the first-stage pushing cylinder (22) is provided with a third sensing device (21) which is electrically connected to the electromagnetic switch of the second-stage pushing cylinder (20); and the side wall of the pushing cylinder (24) is provided with a fourth sensing device which is electrically connected to the electromagnetic switch of the pushing cylinder (24).

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