A method for removing glue from a CTP battery pack module

Abstract

The application discloses a CTP battery pack module glue removing method, which comprises the following steps: step one, discharging the CTP battery pack by using a PPOEOL device, removing the parts and end plates on the surface of the discharged CTP battery pack, and obtaining a battery single column group to be polished; step two, sleeving a lifting belt on the outside of the battery single column group to be polished, hoisting the battery single column group to be polished to an operation table by using a crane, and limiting the battery single column group to be polished on the operation table by using a limiting clamp, so that the battery single column group to be polished is located below a polisher. The CTP battery pack module glue removing method can guarantee the flatness of the surface of the battery cell after the glue layer is scraped, and can supplement an insulation layer on the flat surface of the battery cell, so that a completed battery cell is obtained, the situation that the battery cell is scrapped due to the fact that the depth of scratches on the surface of the battery cell is inconsistent and the insulation layer on the surface of the battery cell is damaged seriously and cannot be repaired is avoided, resource waste is reduced, and the recycling of the battery cell is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery recycling, in particular to a glue removing method for CTP battery pack modules. BACKGROUND

[0002] The CTP battery pack is a new type of battery packaging technology, which is used in large-scale applications such as electric vehicles and energy storage systems. The traditional battery pack is composed of many single batteries connected by wires and managed and controlled by a battery management system. The basic principle of the CTP battery pack is to delete the wires and connectors between the single batteries and directly integrate multiple single batteries in a unified structure to form a compact module. This can reduce resistance, improve the performance and efficiency of the battery pack, and simplify the manufacturing process.

[0003] However, in order to pursue higher specific energy, the existing lithium battery cancels the end plate, side plate and other hardware around the battery cell group, and directly bonds the battery cell group to the shell with glue to form a battery pack. However, directly bonding the battery cell to the shell with glue will form a whole with the battery cell and the shell. When the battery pack is repaired, the surface of the disassembled battery cell group will be attached with a lot of structural adhesive layer, which is difficult to clean. Moreover, when the structural adhesive layer on the surface of the battery cell group is scraped off, the insulating layer on the surface of the battery cell is also easily damaged, causing the battery cell to be damaged and wasting resources. Therefore, the technical personnel in the art provides a glue removing method for CTP battery pack modules to solve the problems raised in the background art. SUMMARY

[0004] The purpose of the present application is to provide a glue removing method for CTP battery pack modules to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A glue removing method for CTP battery pack modules, comprising the following steps:

[0007] Step one, discharging equipment is used to discharge the CTP battery pack, and the surface of the disassembled CTP battery pack is removed, and the battery cell group is obtained.

[0008] Step two, the lifting belt is sleeved on the outside of the battery cell group to be polished, the lifting belt is sleeved on the outside of the battery cell group to be polished, and the lifting belt is sleeved on the outside of the battery cell group to be polished.

[0009] Step three, the FPC circuit board, water pipe and gap between the battery cells on the surface of the battery cell group to be polished are shielded by using the masking paper.

[0010] Step four, moving the polisher, moving the cutter head of the polisher above the left single cell group of the battery single group to be polished, and using the laser range finder to measure the distance between the glue-free surface of each cell in the left single cell group and the cutter head of the polisher in sequence, obtaining the distance data between the cutter head of the polisher and the glue-free surface of the left single cell group.

[0011] Step five, calculating the polishing depth data of the cell surface according to the distance between the glue-free surface of the cell and the cutter head of the polisher, and confirming the polishing depth of the cell surface.

[0012] Step six, adjusting the height of the polisher to make the cutter head of the polisher tightly adhere to the glue layer surface, and driving the polisher according to the polishing depth data of the cell surface to make the cutter head of the polisher repeatedly scrape the glue layer at a constant speed, obtaining the left single cell group with the glue layer removed.

[0013] Step seven, moving the polisher, moving the cutter head of the polisher above the right single cell group of the battery single group to be polished, and using the laser range finder to measure the distance between the glue-free surface of each cell in the right single cell group and the cutter head of the polisher in sequence, obtaining the distance data between the cutter head of the polisher and the glue-free surface of the right single cell group.

[0014] Step eight, repeating steps four to six to obtain the right single cell group with the glue layer removed.

[0015] Step nine, after restoring the cutter head of the polisher to the original position, using the dust collector to clean the glue layer debris remaining on the surface of the left single cell group and the right single cell group, obtaining the battery single group with the glue layer removed.

[0016] Step ten, according to the processing standard of the cell, supplementing the insulating paint on the surface of the cell, making the insulating paint solidify on the surface of the cell to form an insulating paint layer, and sticking a CCS insulating film on the surface of the insulating paint layer, obtaining a complete battery single group, and completing the glue removal of the CTP battery pack surface.

[0017] Preferably, the limiting clamp in step two is two sets of two work plates symmetrically distributed, and the four work plates are tightly adhered to the four sides of the battery single group to be polished.

[0018] Preferably, the distance data between the cutter head of the polisher and the glue-free surface of the left single cell group obtained in step four is the maximum data in the distance data between the glue-free surface of each cell in the left single cell group and the cutter head of the polisher.

[0019] Preferably, the distance data between the cutter head of the polisher and the glue-free surface of the right single cell group obtained in step seven is the maximum data in the distance data between the glue-free surface of each cell in the right single cell group and the cutter head of the polisher.

[0020] Preferably, the data of the surface polishing depth of the left single cell group is the data obtained by subtracting 0.5mm from the distance data between the polishing machine cutter head and the glue-free surface of the left single cell group in step four.

[0021] Preferably, the data of the surface polishing depth of the right single cell group is the data obtained by subtracting 0.5mm from the distance data between the polishing machine cutter head and the glue-free surface of the right single cell group in step seven.

[0022] Preferably, the height of the polishing machine in step six is adjusted so that the position where the polishing machine cutter head is in close contact with the surface of the glue layer is the initial position, and the position where the polishing machine cutter head scrapes the glue layer to the tail of the cell group is the end position, and the repeated scraping action of the glue layer by the polishing machine at a constant speed is: the polishing machine cutter head scrapes the glue layer from the initial position to the end position, the polishing machine cutter head rises away from the surface of the glue layer, and returns to the initial position to continue scraping the glue layer to the end position, and the above action is repeated until the polishing depth of the cell surface is the same as the polishing depth of the cell surface confirmed in step five, and the polishing of the cell surface is completed.

[0023] Preferably, the height of the polishing machine cutter head when returning to the initial position is lowered by 0.1mm successively, and the lower limit position of the polishing machine cutter head is the same as the polishing depth of the cell surface confirmed in step five.

[0024] Preferably, the laser range finder in step four is installed on one side of the polishing machine cutter head, and the measuring end of the laser range finder is in the same plane as the cutting edge of the polishing machine cutter head.

[0025] Compared with the prior art, the advantages of the present application are that: the present application first shields the FPC circuit board, water pipe and gap between cells of the battery single cell group to be polished by the masking tape, then measures the distance between the polishing machine cutter head and the glue-free surface of the left and right single cell groups in turn, determines the polishing depth of the left and right single cell group surfaces, and then drives the polishing machine to work, so that the polishing machine cutter head repeatedly scrapes the glue layer on the left and right single cell group surfaces at a constant speed, thereby cleaning the glue layer on the cell surface. The cell surface can be shielded to prevent the cell from contacting the glue layer debris, thereby avoiding the situation that the debris is splashed and adhered in the FPC circuit board, water pipe and gap between cells, which is not easy to clean, and ensuring the cleanliness of the cell. Finally, the insulating paint on the cell surface is supplemented according to the processing standard of the cell, the insulating paint is solidified on the cell surface to form an insulating paint layer, and the CCS insulating film is pasted on the surface of the insulating paint layer to obtain a complete battery single cell group, which can ensure the flatness of the cell surface after the glue layer is scraped off, and supplement the insulating layer on the flat cell surface to obtain a completed cell, thereby avoiding the situation that the insulating layer on the cell surface is damaged seriously and cannot be repaired due to the inconsistent depth of the scratches on the cell surface, resulting in the cell being scrapped, reducing resource waste, and realizing the recycling of the cell. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A flow chart of a glue removing method of a CTP battery pack module according to an embodiment of the present application;

[0027] Figure 2 A flow chart of a glue removing method of a CTP battery pack module according to an embodiment of the present application; DETAILED DESCRIPTION

[0028] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In addition, the term "comprise" and any variation thereof is intended to cover non-exclusive inclusion.

[0029] In combination Figure 1 and Figure 2 As shown in the figure, a glue removing method of a CTP battery pack module, comprising the following steps:

[0030] The CTP lithium battery pack is discharged by using a discharge device, and the surface parts and end plates of the discharged CTP battery pack are removed to obtain a battery single column group to be polished. Then, a sling is sleeved on the outside of the battery single column group to be polished, the battery single column group to be polished is hoisted to an operation table by using a hoist, and the battery single column group to be polished is fixed on the operation table by using a limiting clamp. The battery single column group to be polished is located below a polisher, the FPC circuit board, water pipe and gap between the battery cells on the surface of the battery single column group to be polished are shielded by using art paper to prevent the adhesive debris from splashing and adhering to the FPC circuit board, water pipe and gap between the battery cells, and ensure the cleanliness of the battery cells. Then, the polisher is moved above the left single column battery cell group and the right single column battery cell group in sequence, the distance between the polisher bit and the adhesive-free surface of the left single column battery cell group and the right single column battery cell group is measured by using a laser range finder, the distance data between the polisher bit and the adhesive-free surface of the left single column battery cell group and the right single column battery cell group is obtained, the distance data is reduced by 0.5 mm to obtain the surface polishing depth data of the left single column battery cell group and the right single column battery cell group, that is, the lower limit position of the polisher bit, the height of the polisher bit is adjusted, the polisher bit is attached to the adhesive layer on the surface of the left single column battery cell group to determine the initial position of the polisher bit, then the polisher is driven to work, the polisher bit scrapes the adhesive layer from the initial position to the end position, then the polisher bit is controlled to rise and leave the adhesive layer surface, returns to the initial position, and the polisher bit is controlled to move downward by 1 mm, and continues to scrape the adhesive layer to the end position, and the above operation is repeated until the polisher bit reaches the lower limit position, and the adhesive layer on the surface of the left single column battery cell group is removed. The height of the polisher bit is adjusted again, the polisher bit is attached to the adhesive layer on the surface of the right single column battery cell group to remove the adhesive layer on the surface of the right single column battery cell group, thereby completing the cleaning of the adhesive layer on the surface of the battery single column group, ensuring the flatness of the surface of the battery cell after the adhesive layer is removed. Finally, the adhesive debris on the surface of the battery cell is cleaned again, and the insulating paint on the surface of the battery cell is supplemented according to the processing standard of the battery cell, so that the insulating paint layer is formed on the surface of the battery cell by solidifying the insulating paint on the surface of the battery cell, and the CCS insulating film is pasted on the surface of the insulating paint layer to obtain a complete battery single column group, and the adhesive removal of the CTP battery pack module is completed.

[0031] In one embodiment, two groups of symmetrical distribution of two tooling plates are used, and the two groups of symmetrical distribution of tooling plates are respectively attached to the four sides of the battery single column group to be polished, so that the battery single column group is clamped and fixed on the operation table. The four sides of the battery single column group can be limited, and the surface adhesive layer cleaning effect of the battery single column group is not affected by the shaking of the battery single column group during the cleaning process, and the surface adhesive layer cleaning work of the battery single column group is ensured.

[0032] In one embodiment, the laser range finder is used to measure the distance between the polishing machine cutter head and the glue-free surface of each cell in the left and right single-column cell groups, obtain the distance data between the polishing machine cutter head and the glue-free surface of each cell in the left and right single-column cell groups, and select the maximum data in the distance data between the polishing machine cutter head and the glue-free surface of each cell in the left single-column cell group and the maximum data in the distance data between the polishing machine cutter head and the glue-free surface of each cell in the right single-column cell group as the distance data between the polishing machine cutter head and the glue-free surface of each cell in the left and right single-column cell groups. Then, according to the selected distance data between the polishing machine cutter head and the glue-free surface of each cell in the left and right single-column cell groups, the polishing depth of the cell surface in the left and right single-column cell groups is confirmed, and the polished surfaces of each cell are made flush, ensuring the flatness of the cell surface and avoiding the situation where the insulating layer of the cell surface is severely damaged and cannot be repaired due to the inconsistent depth of scratches on the cell surface, thereby achieving protection of the cell.

[0033] In one embodiment, after the selected distance data between the polishing machine cutter head and the glue-free surface of each cell in the left and right single-column cell groups is subtracted by 0.5 mm, the obtained data is used as the data of the polishing depth of the glue-free surface of each cell in the left and right single-column cell groups. The lower limit position of the polishing machine cutter head is always located inside the insulating layer, avoiding the situation where the cell is damaged due to the extension of the polishing machine cutter head into the cell, reducing the waste of cells, and avoiding the trouble of the presence of glue on the cell surface due to the uneven coating on the cell surface when polishing the glue layer, ensuring the cleaning of the glue layer on the cell surface.

[0034] In one embodiment, by setting the initial position and the end position of the polishing machine cutter head, the polishing machine cutter head is controlled to move down 1 mm from the initial position to the end position after scraping the glue layer, then the polishing machine cutter head is controlled to move up to leave the glue layer surface, return to the initial position, and then the polishing machine cutter head is controlled to move down 1 mm to continue scraping the glue layer to the end position. The above actions are repeated until the polishing machine cutter head reaches the lower limit position, completing the scraping of the glue layer on the surface of the single-column cell group. This can make the polishing machine cutter head repeatedly scrape the glue layer on the surface of the single-column cell group at a constant speed, ensure the flatness of the cell surface after scraping the glue layer, avoid the situation where the insulating layer of the cell surface is severely damaged due to the inconsistent depth of scratches on the cell surface, and facilitate the subsequent cell repair work.

[0035] The method first shields the FPC circuit board, water pipe and gap between the battery monomer groups to be polished by masking paper, so that the battery cells do not contact the adhesive debris, avoiding the debris splashing and adhering to the FPC circuit board, water pipe and gap between the battery cells, which is not easy to clean, ensuring the cleanliness of the battery cells. Then, the distance between the polishing machine tool bit and the glue-free surface of the left and right monomer groups is measured in turn to determine the polishing depth of the surface of the left and right monomer groups and the lower limit position of the polishing machine tool bit. Then, the initial position and end position of the polishing machine tool bit are determined. The polishing machine tool bit is scraped from the initial position to the end position, then the polishing machine tool bit is raised to leave the adhesive layer surface, returns to the initial position, and the polishing machine tool bit is controlled to move downward by 1mm, and the adhesive layer is continuously scraped to the end position. The above operation is repeated until the polishing machine tool bit reaches the lower limit position, and the adhesive layer on the surface of the battery monomer group is scraped off. The polishing machine tool bit uniformly and repeatedly scrapes the adhesive layer on the surface of the battery monomer group to ensure the flatness of the surface of the battery cell after the adhesive layer is scraped off, and prevent the battery cell surface from having missed adhesive layer. In this way, the cleaning of the adhesive layer on the surface of the battery cell is completed. Finally, the adhesive debris on the surface of the battery cell is cleaned, and the insulating paint on the surface of the battery cell is supplemented according to the processing standard of the battery cell, so that the insulating paint layer is formed on the surface of the battery cell after the insulating paint is solidified. Then, the CCS insulating film is pasted on the surface of the insulating paint layer to obtain a complete battery monomer group, complete the glue removal of the CTP battery pack module, supplement the insulating layer on the flat surface of the battery cell, obtain a complete battery cell, avoid the situation that the insulating layer on the surface of the battery cell is damaged seriously and cannot be repaired, resulting in the battery cell being scrapped, reduce resource waste, and realize the recycling of the battery cell.

[0036] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes within the technical scope disclosed in the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for removing adhesive from a CTP battery pack module, characterized in that, Includes the following steps: Step 1: Discharge the CTP battery pack using a discharge device, remove the components and end plates from the surface of the discharged CTP battery pack, and obtain the battery single-row group to be polished. Step 2: Attach the sling to the outside of the battery row to be polished, use a crane to lift the battery row to be polished onto the operating platform, and use a limiting clamp to limit the battery row to be polished on the operating platform so that the battery row to be polished is located below the polishing machine. Step 3: Use masking tape to cover the FPC circuit board, water pipes, and gaps between cells on the surface of the battery single-row array to be sanded. Step 4: Move the polishing machine and position the polishing head above the left single-row cell group of the battery single-row group to be polished. Use a laser rangefinder to measure the distance between the glue-free surface of each cell in the left single-row cell group and the polishing head in turn, and obtain the distance data between the polishing head and the glue-free surface of the left single-row cell. Step 5: Calculate the grinding depth of the battery cell surface based on the distance between the glue-free surface of the battery cell and the grinding machine head, and confirm the grinding depth of the battery cell surface. Step 6: Adjust the height of the grinder so that the grinder head is in close contact with the adhesive layer surface. Drive the grinder according to the obtained grinding depth data of the cell surface, and let the grinder head scrape the adhesive layer repeatedly at a uniform speed to obtain the left single row of cells with the adhesive layer removed. Step 7: Move the polishing machine and position the polishing head above the right single-row cell group of the battery single-row group to be polished. Use a laser rangefinder to measure the distance between the glue-free surface of each cell in the right single-row cell group and the polishing head in turn, and obtain the distance data between the polishing head and the glue-free surface of the right single-row cell. Step 8: Repeat steps 4 to 6 to obtain the right single-row cell assembly with the adhesive layer removed; Step 9: After returning the grinder blade to its original position, use a vacuum cleaner to clean the residual adhesive debris on the surface of the left and right single-row battery cells, and obtain the battery single-row group after removing the adhesive layer. Step 10: Replenish the insulating varnish on the surface of the battery cell according to the cell processing standards, allow the insulating varnish to cure on the surface of the battery cell to form an insulating varnish layer, and then attach a CCS insulating film to the surface of the insulating varnish layer to obtain a complete battery single row group, thus completing the removal of adhesive from the surface of the CTP battery pack.

2. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, The limiting fixture in step two consists of two sets of symmetrically distributed tooling plates, with the four tooling plates tightly attached to the four sides of the single row of batteries to be polished.

3. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, The distance data between the grinding machine cutter head and the glue-free surface of the left single-row battery cell obtained in step four is the maximum data among the distance data between the glue-free surface of each battery cell in the left single-row battery cell group and the grinding machine cutter head.

4. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, The distance data between the grinding machine cutter head and the glue-free surface of the right single-row cell obtained in step seven is the maximum data among the distance data between the glue-free surface of each cell in the right single-row cell group and the grinding machine cutter head.

5. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, The data for the surface grinding depth of the left single-row cell group is obtained by subtracting 0.5mm from the distance data between the grinding machine head and the glue-free surface of the left single-row cell obtained in step four.

6. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, The data for the surface grinding depth of the right single-row cell group is obtained by subtracting 0.5mm from the distance data between the grinding machine blade and the glue-free surface of the right single-row cell obtained in step seven.

7. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, In step six, adjust the height of the polishing machine so that the polishing head is in close contact with the adhesive layer surface as the initial position. The polishing head scrapes the adhesive layer to the tail of the battery cell assembly as the ending position. The polishing machine repeatedly scrapes the adhesive layer at a constant speed as follows: the polishing head scrapes the adhesive layer from the initial position to the ending position, the polishing head rises away from the adhesive layer surface, and returns to the initial position to continue scraping the adhesive layer to the ending position. Repeat the above actions until the polishing depth of the battery cell surface is the same as the polishing depth of the battery cell surface confirmed in step five, thus completing the polishing of the battery cell surface.

8. The method for removing adhesive from a CTP battery pack module according to claim 7, characterized in that, The height of the grinding machine cutter head as it returns to its initial position decreases by 0.1mm each time, and the lower limit of the grinding machine cutter head is the same as the grinding depth of the battery cell surface confirmed in step five.

9. The method for removing adhesive from a CTP battery pack module according to claim 1, characterized in that, In step four, the laser rangefinder is installed on one side of the grinder head, and the measuring end of the laser rangefinder is on the same plane as the cutting edge of the grinder head.

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