WO2019109302A1

WO2019109302A1 - Automatic cleaning device for tab of battery cell

Info

Publication number: WO2019109302A1
Application number: PCT/CN2017/115003
Authority: WO
Inventors: 欧泽兵; 唐思祖; 何茂水; 马益金
Original assignee: 惠州市成泰自动化科技有限公司
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2019-06-13

Abstract

An automatic cleaning device for a tab of a battery cell, comprising a laser cleaning system for cleaning the surface of a tab of a battery cell, and an automatic battery cell turning over system for turning over a battery cell. The automatic battery cell turning over system comprises a turning over mechanism for implementing the turning over of a battery cell and a clamping mechanism for clamping a battery cell during the turning over process, the clamping mechanism comprising one or more clamping assemblies (1), and a driving assembly for controlling the clamping assembly to extend and retract. The turning over mechanism comprises a stepping motor (2), a synchronous conveyor belt, and a synchronous gear group (401) which is in transmission connection with the stepping motor by means of the synchronous conveyor belt. The present device cleans the surface of a tab of a battery cell by means of the intelligent cooperation of the automatic battery cell turning over system and the laser cleaning system; the laser cleaning system releases laser beams having high energy density to burn the surface of a tab of a battery cell to vaporize the residual electrolytic solution, avoiding secondary contamination, ensuring the quality of a battery cell. The automatic battery cell turning over system flexibly and accurately turns over a battery cell using a two-degree-of-freedom rotation clamping mechanism, ensuring the cleaning of both surfaces of a tab.

Description

Battery core automatic cleaning equipment

Technical field

The invention relates to the technical field of battery core cleaning, and in particular to an automatic cleaning device for a battery core.

Background technique

The cylindrical series of power batteries have many advantages such as excellent safety performance, long cycle life, environmental protection and excellent power performance. As one of the excellent clean energy sources, it has become an important member of the new energy field. With the vigorous development of electric vehicles based on clean energy at home and abroad, the market demand for cylindrical series of power batteries is huge, but the requirements for safety and performance are also correspondingly improved.

In the production process of the existing cylindrical series power batteries, the welding cap is welded after the first injection into the electric core; while the positive electrode is completely immersed in the electrolyte during the liquid injection process, the surface of the positive electrode sheet is often filled with electrolyte before welding. In the subsequent ultrasonic welding process, since the surface of the positive electrode ear is contaminated, the welding effect of the cap and the battery core is likely to be unstable, and the phenomenon of soldering or over-welding is easily caused. The occurrence of solder or over-welding may result in abnormal contact resistance and affect battery charge and discharge performance and its service life. Therefore, how to ensure that the surface of the positive electrode is clean when welding, is to stabilize the sealing effect of the cap and the battery core, and to eliminate the key to the phenomenon of soldering and over-welding.

Based on the above technical problems, the common problems faced by the cell manufacturing industry, the applicant conducted a detailed investigation of the technical literature to solve the problem during the research period. At present, the traditional positive electrode cleaning process is still based on manual manual cleaning, the manual cleaning effect is poor, unstable, and the work efficiency is low, and the problem of residual electrolyte on the surface of the positive ear cannot be overcome. The Chinese invention of the publication No. CN100569396C discloses a cleaning method for a coating of a tab-shaped metal foil pole piece welding portion and a cleaning device thereof. The cleaning method of the invention is characterized in that it is laser cleaning, and in turn, laser scanning is performed to remove residues, and the cleaning device comprises a PLC programmable electronic control device, a horizontal frame, a working platform, Scanning gantry, brushing gantry, unwinding device, winding device, laser scanning device, residue removal device and feed length sensor are the main features. The cleaning device disclosed in the invention achieves a rapid cleaning of the tabs to a certain extent and also improves the cleaning quality, but the cleaning device of the invention has a complicated structure and a high cost.

Summary of the invention

In order to achieve the above problems, the present invention provides a battery core automatic cleaning device with a simple structure.

The invention adopts the following technical solutions: a battery core automatic cleaning device, comprising a laser cleaning system for cleaning the surface of the cell core, and an automatic cell inversion system for inverting the cell.

The automatic cell turnover system includes an inversion mechanism that implements cell flipping and a clamping mechanism that clamps the cell during inversion.

The clamping mechanism includes one or more clamping assemblies and a drive assembly for controlling the expansion and contraction of the clamping assembly.

The clamping assembly includes a connecting rod and a clamping jaw, the connecting rod is connected to the clamping claw at one end and the driving assembly is connected to the other end.

The clamping claw comprises a connecting block and two clamping arms, and the two clamping arms are symmetrically mounted on the upper and lower ends of the connecting block through the connecting piece, and the connecting block and the connecting piece, the clamping arm and the connecting piece are connected by the rotating shaft.

The clamping arm includes a first clamping block and a second clamping block. One end of the first clamping block is connected to the connecting block through a rotating shaft, and the other end is connected to the second clamping block through a rotating shaft. The second clamping The end of the block is provided with a clamping arc surface that matches the curved surface of the outer wall of the cell.

The drive assembly includes a cylinder, the push rod of the cylinder is coupled to a push shaft, the push shaft is sleeved to the link through the bearing, and a portion of the push shaft is inserted into the link.

The clamping mechanism further includes a rotating assembly including a rotating rod sleeved on the connecting rod, and a rotating groove connected to the rotating rod and sleeved outside the clamping arm.

The turning mechanism includes a stepping motor, a synchronous belt, and a synchronous wheel set connected to the stepping motor through a synchronous belt. The synchronous wheel set is a synchronous gear mounted on each rotating rod.

The invention adopts an automatic battery core inversion system, and intelligently cooperates with the laser cleaning system to clean the surface of the cell core. Since the automatic cell inversion system realizes the rotation of the cell core 180 degrees, it is ensured that both sides of the cell core can be cleaned, thereby Achieve good automatic cleaning results.

The laser cleaning system includes at least one laser generator, and each of the laser generators performs cleaning operations on the surfaces of the four battery core tabs. By releasing the laser beam of high energy density, the laser generator sequentially performs surface burning treatment on the four electrode cores to vaporize the residual electrolyte on the surface of the ear, thereby achieving a complete cleaning effect.

The laser cleaning system can automatically clean the side of the battery core in one cleaning operation. When the laser cleaning system completes a cleaning operation, the automatic battery core inversion system intervenes to make the battery core rotate 180 degrees. After the battery core is turned over, the automatic battery core The system is flipped over and the laser cleaning system works again to automatically clean the other side of the cell.

Preferably, wherein the clamping mechanism preferably comprises 4n clamping assemblies (n > or = 1). As a more preferred solution, the clamping mechanism comprises eight clamping assemblies. In addition, the inventors have found through intensive research that after the clamping assembly clamps the battery core, the spacing between adjacent cells is preferably set to 30 mm to 50 mm, especially the spacing between adjacent cells. It is best for 45mm to 50mm. Precise control of the spacing of adjacent cells ensures the key to cleaning efficiency and cleaning. The invention particularly uses a laser beam to effectively cover a laser generator with a distance of 160 mm, and scientifically sets the spacing between adjacent cells, so that a single laser generator can effectively cover 4 cells for efficient cleaning. Since a single laser generator can clean four batteries at the same time, the cleaning efficiency is greatly improved on the one hand, and the consistency of the cleaning effect is ensured on the other hand, which helps to improve the quality stability of the battery. When the above clamping mechanism comprises four clamping components, the battery core automatic cleaning device can simultaneously clean four batteries at the same time; similarly, when the clamping mechanism comprises eight clamping components, the battery core is The automatic cleaning equipment can clean 8 batteries at the same time. The cleaning effect is best when each laser generator covers 4 batteries, so the above clamping mechanism includes 4 clamping components, and a laser generator is added.

During operation, the cylinder-based extension action advances the clamping assembly to the cell and clamps the cell through the two-degree-of-freedom clamping jaw; the laser cleaning system cleans the first side of the cell tip and passes The stepping motor drive controls the clamping claw to drive the battery core to rotate 180 degrees. After the battery core is rotated, the automatic battery core turning mechanism is withdrawn; after the laser cleaning system completes cleaning the second surface of the battery core, the transmission belt is moved at a fixed distance, and the movement is resumed. Ship the next batch of cells into the next work cycle.

Further, the automatic cell inversion system further includes a positioning mechanism for controlling the position of the clamping mechanism.

The positioning mechanism includes a guide rail and a slide plate slidable along the guide rail, the slide plate being coupled to a positioning cylinder for pushing and pulling back. The clamping mechanism is mounted on the slide.

Still further, the automatic cell inversion system further includes a mounting base, the rail being fixed to the mounting base.

The laser cleaning system further includes a mounting bracket, the laser generator being disposed on the mounting bracket and located above the clamping mechanism.

The laser generator is disposed on the mounting frame through a pallet, and the pallet is provided with an adjustment lever for adjusting the height of the laser generator.

The beneficial effects of the invention are:

1. One of the innovations of the present invention is that the innovative use of the automatic cell inversion system and the laser cleaning system intelligently cooperate to clean the surface of the cell core; since the laser cleaning system can release the laser beam of high energy density to the cell core in turn The surface is burned to vaporize the residual electrolyte on the surface of the ear, the cleaning effect is good, and the welding quality is not affected; and the laser cleaning is safe and fast, does not cause secondary pollution, and can ensure the quality of the battery.

2. The automatic cell inversion system of the invention can realize the rotation of the battery core by 180 degrees, and the clamping mechanism with two degrees of freedom rotation can flexibly and accurately flip the battery core to ensure that both sides of the battery core can be cleaned, thereby achieving good automatic. Cleaning effect.

3. The invention scientifically sets the spacing between the cells, and maximizes the coverage of the laser generator, so that the laser cleaning system can quickly clean four cells at a time, and realize 8 batteries in 6 seconds. The cleaning of both sides of the ear provides great cleaning efficiency.

DRAWINGS

1 is a schematic structural view of Embodiment 1 of the present invention;

2 is a schematic structural view of Embodiment 2 of the present invention;

Figure 3 is a schematic structural view of a clamping mechanism of the present invention;

Figure 4 is a longitudinal cross-sectional view of the clamp structure of the present invention.

Detailed ways

Example 1

As shown in Figures 1, 3 and 4, the embodiment discloses an automatic cleaning device for a battery core, comprising a laser cleaning system for cleaning the surface of the battery core, and an automatic battery core for inverting the battery core. system.

The clamping mechanism includes eight clamping assemblies 1 and a drive assembly for controlling the expansion and contraction of the clamping assembly.

The clamping assembly includes a connecting rod 101 and a clamping jaw, and the connecting rod 101 is connected to the clamping claw at one end and to the driving assembly at the other end.

The clamping claw includes a connecting block 102 and two clamping arms 103. The two clamping arms are symmetrically mounted on the upper and lower ends of the connecting block 102 through the connecting piece 104, and the connecting block 102 and the connecting piece 104, the clamping arm and the connecting piece Connected via the rotating shaft 105.

The clamping arm includes a first clamping block and a second clamping block. One end of the first clamping block is connected to the connecting block through a rotating shaft, and the other end is connected to the second clamping block through a rotating shaft. The second clamping The end of the block is provided with a clamping curved surface 106 that matches the curved surface of the outer wall of the cell.

The drive assembly includes a cylinder 201 having a push rod coupled to a push shaft 202, a push shaft sleeved to the link 101 through a bearing, and a portion of the push shaft inserted into the link.

The clamping mechanism further includes a rotating assembly including a rotating rod 301 sleeved on the connecting rod, and a rotating groove 302 connected to the rotating rod and sleeved outside the clamping arm.

The turning mechanism includes a stepping motor 2, a synchronous belt, and a synchronous wheel set 401 that is connected to the stepping motor through a synchronous belt. The synchronous wheel set is a synchronous gear mounted on each rotating rod.

The laser cleaning system includes at least one laser generator 3, each of which performs cleaning operations on the surface of the four cell cores. By releasing the laser beam of high energy density, the laser generator sequentially performs surface burning treatment on the four electrode cores to vaporize the residual electrolyte on the surface of the ear, thereby achieving a complete cleaning effect.

Preferably, wherein the clamping mechanism preferably comprises 4n clamping assemblies (n > or = 1). The clamping mechanism of this embodiment includes eight clamping assemblies. In addition, the inventors have found through intensive research that after the clamping assembly clamps the battery core, the spacing between adjacent cells is preferably set to 30 mm to 50 mm, especially the spacing between adjacent cells. It is best for 45mm to 50mm. Precise control of the spacing of adjacent cells ensures the key to cleaning efficiency and cleaning. The invention particularly uses a laser beam to effectively cover a laser generator with a distance of 160 mm, and scientifically sets the spacing between adjacent cells, so that a single laser generator can effectively cover 4 cells for efficient cleaning. Since a single laser generator can clean 4 batteries at the same time, the cleaning efficiency is greatly improved on the one hand, and the consistency of the cleaning effect is ensured on the other hand, which helps to improve the quality stability of the battery. When the above clamping mechanism comprises 8 clamping assemblies, the battery core automatic cleaning device can simultaneously clean 8 batteries at a time. The cleaning effect is best when each laser generator covers 4 batteries, so the above clamping mechanism includes 4 clamping components, and a laser generator is added.

The positioning mechanism includes a guide rail and a slide plate slidable along the guide rail, the slide plate being coupled to the positioning cylinder 11 for pushing and pulling back. The clamping mechanism is mounted on the slide.

Still further, the automatic cell turnover system further includes a mounting base 4, the rail being fixed to the mounting base.

The laser cleaning system further includes a mounting bracket, the laser generator being disposed on the mounting bracket 5 and located above the clamping mechanism.

The laser generator is disposed on the mounting frame through a pallet, and the pallet is provided with an adjustment lever 6 for adjusting the height of the laser generator.

Example 2

As shown in Figures 2, 3 and 4, the embodiment discloses an automatic cleaning device for a battery core, comprising a laser cleaning system for cleaning the surface of the battery core, and an automatic battery core for inverting the battery core. system.

The automatic cell inversion system includes an inversion mechanism that implements cell flipping and a clamping mechanism 1 that clamps the cell during inversion.

The clamping mechanism includes four clamping assemblies and a drive assembly for controlling the expansion and contraction of the clamping assembly.

The clamping assembly includes a connecting rod 101 and a clamping claw, the connecting rod is connected to the clamping claw at one end and the driving assembly is connected to the other end.

The clamping claw includes a connecting block 102 and two clamping arms 103. The two clamping arms are symmetrically mounted on the upper and lower ends of the connecting block through the connecting piece 104, and the connecting block and the connecting piece, the clamping arm and the connecting piece pass through the rotating shaft 105. connection.

The driving assembly includes a cylinder 201, and the push rod of the cylinder is connected with a push shaft 202. The push shaft is sleeved to the connecting rod through a bearing, and a part of the pushing shaft is inserted into the connecting rod.

The laser cleaning system is a laser generator 3, and each laser generator performs cleaning work on the surface of the four battery cores. By releasing the laser beam of high energy density, the laser generator sequentially performs surface burning treatment on the four electrode cores to vaporize the residual electrolyte on the surface of the ear, thereby achieving a complete cleaning effect.

Preferably, wherein the clamping mechanism preferably comprises 4n clamping assemblies (n > or = 1). The clamping mechanism in this embodiment includes four clamping assemblies. In addition, the inventors have found through intensive research that after the clamping assembly clamps the battery core, the spacing between adjacent cells is preferably set to 30 mm to 50 mm, especially the spacing between adjacent cells. It is preferable that it is 45 mm to 50 mm, and in this embodiment, the interval between adjacent cells is set to 45 mm. Precise control of the spacing of adjacent cells ensures the key to cleaning efficiency and cleaning. The invention particularly uses a laser beam to effectively cover a laser generator with a distance of 160 mm, and scientifically sets the spacing between adjacent cells, so that a single laser generator can effectively cover 4 cells for efficient cleaning. Since a single laser generator can clean 4 batteries at the same time, the cleaning efficiency is greatly improved on the one hand, and the consistency of the cleaning effect is ensured on the other hand, which helps to improve the quality stability of the battery. When the clamping mechanism includes four clamping components, the battery core automatic cleaning equipment can simultaneously clean four batteries at a time; the cleaning effect is best when each laser generator covers four batteries, therefore, the above The clamping mechanism includes four clamping assemblies, and in this embodiment, a laser generator is provided.

The laser cleaning system further includes a mounting bracket 5 disposed on the mounting bracket and located above the clamping mechanism.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A battery core automatic cleaning device, comprising a laser cleaning system for cleaning the surface of the battery core, and an automatic battery inversion system for inverting the battery core.
The battery core automatic cleaning apparatus according to claim 1, wherein said automatic battery core inversion system comprises an inverting mechanism for inverting the battery core and a clamping mechanism for clamping the battery core when inverting.
3. The battery core automatic cleaning apparatus according to claim 1, wherein said clamping mechanism comprises one or more clamping assemblies (1), and a driving assembly for controlling expansion and contraction of said clamping assembly .
The battery core automatic cleaning device according to any one of claims 1 to 3, characterized in that the turning mechanism comprises a stepping motor (2), a synchronous belt transmission and a transmission by a synchronous belt and a stepping motor. The connected sync wheel set.
A battery core automatic cleaning apparatus according to claim 4, wherein said laser cleaning system comprises at least one laser generator (3).
The battery core automatic cleaning apparatus according to claim 5, wherein said clamping mechanism comprises 4n clamping members (n> or =1).
The battery core automatic cleaning apparatus of claim 6 wherein said automatic cell inversion system further comprises a positioning mechanism for controlling the position of the clamping mechanism.
The battery core automatic cleaning device according to claim 7, wherein the positioning mechanism comprises a guide rail and a sliding plate slidable along the guide rail, and the sliding plate is connected to the positioning cylinder (11) for pushing and pulling back. The clamping mechanism is mounted on the slide.
The battery core automatic cleaning device according to any one of claims 1 to 3 or 4 to 8, characterized in that the automatic battery core inversion system further comprises a mounting base (4), the rail is fixed at the On the mounting base.
The battery core automatic cleaning apparatus according to claim 1, wherein said laser cleaning system further comprises a mounting frame (5), said laser generator being disposed on the mounting frame and located at said clamping mechanism Corresponding to the upper; the laser generator is disposed on the mounting frame through the pallet, and the pallet is provided with an adjusting rod (6) for adjusting the height of the laser generator.