Battery piece side edge insulation processing device and battery piece side edge insulation processing system with same

Abstract

The utility model discloses a battery piece side edge insulation processing device and a battery piece side edge insulation processing system with the same. The battery piece side edge insulation processing device comprises a cleaning unit and a carrying unit. The cleaning unit comprises a cleaning groove and at least one cleaning module located in the cleaning groove, each cleaning module comprises two rows of cleaning wipers extending in the first direction, the two rows of cleaning wipers are arranged at intervals in the second direction, and the second direction is perpendicular to the first direction; the carrying unit drives the battery pieces to move between the two rows of cleaning wipers in the first direction so that the cleaning wipers can conduct insulation treatment on the side edges of the battery pieces. The two rows of cleaning wipers are arranged in the cleaning unit in a spaced mode, the carrying unit drives the battery pieces to move between the two adjacent rows of cleaning wipers in the first direction, the cleaning wipers conduct insulation treatment on the side edges of the battery pieces, batch production can be maintained, and meanwhile the battery pieces with the insulated side edges are obtained.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic manufacturing, in particular to a battery cell side edge insulation processing device and a battery cell side edge insulation processing system having the same. Background Art

[0002] During the fabrication of solar cells, such as heterojunction cells, TOPCon cells, and PERC cells, the deposition of the front and back film layers inevitably leads to wraparound plating on the other side and the sides. This conductive film on the sides conducts to the front and back films, causing leakage. In existing technology, this wraparound film is typically removed through etching with an etchant or laser etching process to insulate the sides of the cell.

[0003] However, the etching process requires a large amount of chemicals. Using a basket to immerse the cells directly in the etchant takes a long time, and the basket can obstruct localized areas around the cell edges, resulting in uneven etching and unsatisfactory results. If the basket is used with ultrasonic vibrations or a swirling cell basket, the fluid can cause the cells to move up and down, left and right, and collide with the basket, potentially damaging the cell edges or even causing cell breakage.

[0004] The laser etching process is expensive, and the high temperature generated by laser etching may damage the battery cells.

[0005] In view of this, it is necessary to provide an improved battery cell side edge insulation processing device and a battery cell side edge insulation processing system having the same to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a battery cell side edge insulation processing device and a battery cell side edge insulation processing system having the same, so as to solve the deficiencies in the prior art and perform insulation processing on the sides of the battery cell.

[0007] In order to achieve the above purpose, the present invention adopts the following scheme:

[0008] A device for insulating the side edges of battery cells comprises a cleaning unit and a carrying unit. The cleaning unit comprises a cleaning trough and at least one cleaning module located within the cleaning trough. The cleaning module comprises two rows of cleaning wipes extending along a first direction. The two rows of cleaning wipes are spaced apart along a second direction, and the second direction is perpendicular to the first direction. The carrying unit drives the battery cells to move along the first direction between the two rows of cleaning wipes, so that the cleaning wipes can perform insulating treatment on the sides of the battery cells.

[0009] In an optional embodiment, the cleaning wipe includes at least one cleaning roller fixed in the cleaning tank and a flexible wipe located on the cleaning roller.

[0010] In an optional embodiment, the distance between the flexible wipes in two rows of cleaning wipes is 10 mm to 30 mm, or the distance between the flexible wipes in two rows of cleaning wipes is 1 to 1.2 times the width of the battery cell in one direction.

[0011] In an optional embodiment, the cleaning wipe extends along the height direction of the cleaning tank, or the cleaning wipe extends along the horizontal direction of the cleaning tank.

[0012] In an optional embodiment, the cleaning wipe is no higher than the highest liquid level line of the cleaning tank.

[0013] In an optional embodiment, the cleaning unit further includes: an inlet connected to the cleaning tank, a discharge port connected to the cleaning tank; and / or a heating component for providing heat to the cleaning tank; and / or an air distribution component for inputting cleaning gas into the cleaning tank; and / or an ultrasonic component.

[0014] In an optional embodiment, the infusion port, the drainage port, the heating component, the air distribution component, and the ultrasonic component are all located below the cleaning wipe.

[0015] In an optional embodiment, the transport unit is a pneumatic clamp, which includes a clamping portion for clamping the front and back sides of the battery cell and a driving source for driving the clamping portion to move along the first direction.

[0016] In an optional embodiment, the clamping portion includes a pair of jaws for clamping the front and back sides of the battery cell, and an air valve for controlling the switching of the pair of jaws between a clamped state and an open state. In a direction perpendicular to the arrangement direction of the pair of jaws, the size of the jaws is not larger than the width of the battery cell in at least one direction; the jaws include a clamping piece and a buffer gasket located on the side of the clamp facing the other clamping piece.

[0017] In an optional embodiment, the driving source is a telescopic cylinder.

[0018] In an optional embodiment, the transport unit is a conveyor belt, the conveyor belt is located between two rows of cleaning wipes, and the conveyor belt extends along the first direction.

[0019] A battery cell side edge insulation processing system comprises the battery cell side edge insulation processing device.

[0020] In an optional embodiment, the battery cell side insulation processing system includes at least two battery cell side insulation processing devices, wherein the two battery cell side insulation processing devices have two different cleaning modules, and the distances between the two rows of cleaning wipes of the two different cleaning modules are different.

[0021] In an optional embodiment, the distance between two rows of cleaning wipes in one battery cell side insulation processing device is adapted to the distance between a pair of side edges of the battery cell; the distance between two rows of cleaning wipes in another battery cell side insulation processing device is adapted to the distance between another pair of side edges of the battery cell.

[0022] In an optional embodiment, the cleaning wipes in all cleaning units extend along the height direction of the cleaning tank, and the carrying unit is a pneumatic clamp.

[0023] In an optional embodiment, the cleaning wipes in all cleaning units extend in a horizontal direction, and the carrying unit is a pneumatic clamp or a conveyor belt.

[0024] In an optional embodiment, the cleaning wipes in some cleaning units extend along the height direction of the cleaning tank, and the carrying unit is a pneumatic clamp; the cleaning wipes in other cleaning units extend along the horizontal direction, and the carrying unit is a pneumatic clamp or a conveyor belt.

[0025] In an optional embodiment, the carrying units of the two cleaning units adapted to the upstream and downstream are both conveyor belts, and the widths of the conveyor belts that carry the battery cells through the two cleaning units are different.

[0026] In an optional embodiment, the carrying units adapted for the two upstream and downstream cleaning units are both conveyor belts, and the battery cell side insulation processing system further includes a rotating table located between the two conveyor belts for rotating the battery cell 90°.

[0027] In an optional embodiment, the battery cell side insulation processing system also includes an auxiliary cleaning device located downstream of the battery cell side insulation processing device, the auxiliary cleaning device includes an auxiliary cleaning tank, a cleaning pipe located in the auxiliary cleaning tank, a nozzle connected to the cleaning pipe, a delivery unit for providing cleaning liquid or cleaning gas to the cleaning pipe, and a discharge unit connected to the auxiliary cleaning tank to discharge waste cleaning liquid or waste gas; wherein, the cleaning pipes are arranged in two rows spaced apart, and the spraying direction of the nozzles in each row is toward between the two rows, or the spraying direction of the nozzles in the two rows is toward a side perpendicular to the arrangement direction of the two rows.

[0028] In an optional embodiment, the auxiliary cleaning device further includes at least one of a heating component and an ultrasonic component located in the cleaning tank.

[0029] Compared with the prior art, the present invention provides two rows of cleaning wipes spaced apart in the cleaning unit, and the carrying unit drives the battery cells to move along the first direction between the two adjacent rows of cleaning wipes, so that the cleaning wipes rub against the sides of the battery cells, remove the conductive film layer on the sides, and achieve insulation treatment. This can maintain batch production and at the same time, obtain battery cells with insulated sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of a battery cell side insulation processing device in one embodiment of the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the cleaning unit;

[0032] Figure 3 for Figure 2 Exploded view of

[0033] Figure 4 for Figure 1 Schematic diagram of the medium carrier unit;

[0034] Figure 5 It is a positioning tool in one embodiment of the present utility model;

[0035] Figure 6 Based on Figure 1 The battery cell side insulation processing system of the battery cell side insulation processing device shown;

[0036] Figure 7 This is a schematic diagram of an auxiliary cleaning device in one embodiment of the present invention;

[0037] Figure 8 for Figure 7 Exploded view of

[0038] Figure 9 Schematic diagram of a battery cell side insulation processing device in another embodiment of the present invention;

[0039] Figure 10 for Figure 9 Schematic diagram after removing the cleaning tank;

[0040] Figure 11 Based on Figure 9 The cell side insulation processing system of the cell side insulation processing device shown (cleaning tank omitted);

[0041] Figure 12 for Figure 11 A top view of

[0042] Figure 13 Based on Figure 9 Another battery cell side insulation processing device of the battery cell side insulation processing system shown;

[0043] Figure 14 for Figure 13 Schematic diagram after removing the electrolytic cell.

[0044] Reference numerals:

[0045] 100-battery cell side insulation processing device, 1-cleaning unit, 11-cleaning tank, 12-cleaning wipe, 121-cleaning roller, 122-flexible wipe, 13-infusion port, 14-drainage port, 15-infusion tube, 16-heating component, 17-air distribution component, 2-carrying unit, 21-pneumatic clamp, 211-clamping part, 2111-clamping claw, 2112-air valve, 212-driving source, 22-conveyor belt, 23-rotating table, 200-battery cell side insulation processing system; 300-auxiliary cleaning device, 31-auxiliary cleaning tank, 32-cleaning tube, 33-spray head, 34-conveyor unit, M1-battery cell, M2-positioning tooling. DETAILED DESCRIPTION

[0046] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] Terms such as "upper", "above", "lower", "below", "top", "bottom", etc. used in this embodiment to indicate relative positions in space are for the purpose of convenience of explanation to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings.

[0048] The terms "first," "second," etc., in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Furthermore, it should be noted that, unless otherwise expressly specified or limited, the term "connected" should be understood in a broad sense. For example, a connection can be a direct connection or an indirect connection through an intermediate medium, and can be a fixed connection, a movable connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0049] In order to make those skilled in the art better understand the technical solution of the present invention, the following is a detailed description of the technical solution of the present invention in combination with the appended drawings in the embodiments of the present invention. Figures 1 to 14 , clearly and completely describe the technical solutions in the implementation methods of the present utility model.

[0050] The present invention aims to provide a battery cell device 100, including a cleaning unit 1 and a carrying unit 2, wherein the carrying unit 2 drives the battery cell M1 to move, and the cleaning unit 1 performs friction cleaning (or "wiping" or "erasing") on the side of the battery cell M1 to remove the conductive film layer expanded or plated around the side, that is, to insulate the side of the battery cell to obtain a battery cell with insulated side.

[0051] For ease of description, the vertical direction is defined based on the normal use state of the cleaning unit 1. The vertical direction can also be called the height direction, and the direction perpendicular to the vertical direction is the horizontal direction. The direction in which the carrier unit 2 moves the battery cell M1 is defined as the first direction, and the direction perpendicular to the first direction is defined as the second direction.

[0052] The cleaning unit 1 includes a cleaning tank 11 and at least one cleaning module located within the cleaning tank 11. Each cleaning module performs insulation treatment on a pair of side edges of a cell M1. Multiple cleaning modules are provided within the cleaning tank 11, enabling simultaneous insulation treatment of multiple cells M1 or sequential insulation treatment of different sides of the same cell M1.

[0053] The cleaning tank 11 creates a more favorable cleaning environment for the battery cell M1, improving cleaning efficiency and cleaning effect. The cleaning tank 11 can also collect waste generated by cleaning to avoid affecting the environment.

[0054] Specifically, the cleaning unit 1 also includes an infusion port 13 connected to the cleaning tank 11 and a drainage port 14 connected to the cleaning tank 11. The infusion port 13 is connected to the cleaning tank 11 via an infusion tube 15, and cleaning liquid is injected into the cleaning tank 11. The battery cell M1 is immersed in the cleaning liquid, and the friction of the cleaning module can improve the cleaning efficiency and cleaning effect of the side conductive film layer. Of course, when the infusion port 13 and drainage port 14 are not provided, the cleaning liquid can also be manually added to or poured out of the cleaning tank 11 from the top.

[0055] The cleaning tank 11 is preferably made of a material that is resistant to oxidation, workable, heat-resistant and deformation-resistant, such as polytetrafluoroethylene (PTFE, Teflon), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC) and polyphenylsulfone (PPSU), to prevent it from being corroded by the cleaning solution.

[0056] The cleaning solution is usually selected according to the membrane layer to be cleaned, and is not limited in detail herein.

[0057] For example, when cleaning transparent conductive films such as ITO and metal seed layers, an acidic etching solution can be used as the cleaning solution, such as a mixture of hydrofluoric acid (HF), hydrochloric acid (HCl), and nitric acid (HNO3). In one embodiment, commercially available 40% HF, 37% HCl, and 68% HNO3 are added to water and mixed to form a cleaning solution; the volume concentration of HF is 10 mL / L to 50 mL / L, the volume concentration of HCl is 50 mL / L to 100 mL / L, and the volume concentration of HNO3 is 5 mL / L to 50 mL / L.

[0058] The metal silicon alloy layer can be cleaned with a mixed aqueous solution of hydrogen peroxide (H2O2) and sulfuric acid (H2SO4). In one embodiment, the concentration of H2O2 is 100 g / L to 200 g / L, and the concentration of H2SO4 is 50 g / L to 150 g / L.

[0059] The cleaning module includes two rows of cleaning wipes 12 extending along a first direction. The two rows of cleaning wipes 12 are spaced apart along a second direction, forming a cleaning channel between the two rows of cleaning wipes 12. The carrier unit 2 drives the battery cell M1 to move within the cleaning channel, so that the cleaning wipes 12 frictionally clean a pair of side edges of the battery cell M1. That is, the cleaning wipes 12 wipe away the conductive film layer on the pair of side edges of the battery cell M1, resulting in a battery cell with insulated side edges.

[0060] The cleaning wipe 12 includes at least one cleaning roller 121 fixed in the cleaning tank 11 and a flexible wipe 122 located on the cleaning roller 121. The cleaning roller 121 provides fixed support for the flexible wipe 122. The flexible wipe 122 contacts the side of the cell M1 and removes the film layer on the side of the cell M1 as the cell M1 moves, thereby shortening the cleaning process and ensuring the complete effect and uniformity of the side cleaning.

[0061] The flexible wiper 122 flexibly contacts the side of the cell M1, preventing unnecessary damage to the side of the cell M1. In one embodiment, the flexible wiper 122 is a sponge. The sponge can also absorb a certain amount of cleaning liquid. When wet, it rubs against the side of the cell M1, achieving a dual cleaning effect of cleaning liquid etching and mechanical friction, achieving a better cleaning effect and ensuring that the side structure is insulated.

[0062] The distance between the flexible wipes 122 of the two rows of cleaning wipes 12 is 10 mm to 30 mm, which is suitable for common battery cells M1 on the market. Alternatively, the distance between the flexible wipes 122 of the two rows of cleaning wipes 12 is 1 to 1.2 times the width of the battery cell M1 in one direction. This spacing setting can effectively create friction with the side edges of the battery cell M1 without excessively pressuring the sides of the battery cell M1, which could cause breakage.

[0063] The assembly methods of the flexible wiper 122 and the cleaning roller 121 include but are not limited to the following.

[0064] In one embodiment, the cleaning wipe 12 includes a cleaning roller 121 , and the flexible wipe 122 is wrapped around the cleaning roller 121 .

[0065] In another embodiment, the cleaning wipe 12 includes a plurality of cleaning rollers 121 arranged along a first direction, and the flexible wipe 122 on each cleaning roller 121 is independently provided.

[0066] In another embodiment, the cleaning wipe 12 includes a plurality of cleaning rollers 121 arranged along a first direction, and the flexible wipes 122 on at least two of the cleaning rollers 121 are connected as a whole, or one flexible wipe 122 is connected to at least two of the cleaning rollers 121 .

[0067] The extending directions of the cleaning wipe 12 include but are not limited to the following.

[0068] In one embodiment, please refer to Figures 1 to 8 As shown, the cleaning wipe 12 extends along the height direction of the cleaning tank 11, that is, one or more cleaning rollers 121 are arranged along the height direction; the carrier unit 2 drives the battery cell M1 to move up and down, rubbing against the cleaning wipe 12. At this time, the cleaning rollers 121 extend in the horizontal direction, that is, the axial direction of the cleaning rollers 121 is the horizontal direction.

[0069] In another embodiment, please refer to Figures 9 to 14 As shown, the cleaning wipe 12 extends horizontally, that is, one or more cleaning rollers 121 are arranged horizontally, and the carrier unit 2 drives the battery cell M1 to move horizontally, so that the side of the battery cell M1 rubs against the cleaning wipe 12. At this time, the cleaning rollers 121 extend in the up-down direction.

[0070] In order to improve the cleaning effect and efficiency, a cleaning liquid is injected into the cleaning tank 11. When the carrier unit 2 drives the battery cell M1 to move, it rubs against the cleaning wipe 12 in the atmosphere of the cleaning liquid. The etching liquid and the friction cleaning work at the same time, which can improve the cleaning efficiency and have a good cleaning effect, ensuring that the side is an insulating structure.

[0071] Preferably, the cleaning wipe 12 is not higher than the highest liquid level of the cleaning tank 11, that is, the cleaning wipe 12 is in the atmosphere of the cleaning liquid. In one embodiment, the top of the cleaning wipe 12 is 10mm to 50mm lower than the highest liquid level.

[0072] When the cleaning wipe 12 extends in the height direction, the top of the cleaning roller 121 or the topmost one of the multiple cleaning rollers 121 is no higher than the highest liquid level line of the cleaning tank 11. The carrier unit 2 drives the battery cell M1 into the cleaning tank 11 from the top and moves from top to bottom. In the atmosphere of the cleaning liquid, it rubs against the cleaning wipe 12, achieving a dual cleaning effect of etching with the etching liquid and friction cleaning, resulting in a battery cell with side insulation.

[0073] When the cleaning wipe 12 extends horizontally, the carrier unit 2 drives the battery cell M1 to move horizontally. The side of the battery cell M1 contacts the cleaning wipe 12 in the atmosphere of the cleaning liquid. When the two move relative to each other, it is easier to clean the film layer on the side of the battery cell M1.

[0074] In order to improve the cleaning effect, the cleaning unit 1 further includes at least one of a heating component 16 for providing heat to the cleaning tank 11 , an air distribution component 17 for inputting cleaning gas into the cleaning tank 11 , and an ultrasonic component.

[0075] The heating component 16 can heat the cleaning tank 11 or the cleaning liquid in the cleaning tank 11 to improve the cleaning efficiency and cleaning effect. In one embodiment, the heating component 16 is a heating plate fixed to the side wall or bottom wall of the cleaning tank 11.

[0076] The air distribution assembly 17 is used to blow air toward the cell M1 to remove cleaning fluid or impurities adhering to the cell M1. In one embodiment, the air distribution assembly is fixed to the bottom wall of the cleaning tank 11, or to the side walls arranged along the second direction. The airflow flows from one side of the cell M1 to the other, rather than vertically toward the front or back of the cell M1, which is more conducive to blowing off attached objects.

[0077] The ultrasonic component cooperates with the cleaning liquid to realize ultrasonic cleaning, and the cleaning effect is good.

[0078] Regardless of whether the cleaning wipe 12 extends in the height direction or the horizontal direction, the heating component, the air distribution component, and the ultrasonic component are all located below the cleaning wipe 12, that is, arranged at the bottom of the cleaning tank 11, and will not interfere with the movement of the battery cell M1, and the working range can cover the entire cleaning channel.

[0079] The carrier unit 2 drives the cell M1 to move along the first direction between the two rows of cleaning wipes 12, so that the cleaning wipes 12 can rub and clean the side edges of the cell M1, remove the conductive film layer that is wrapped around or plated around the side edges, and achieve side insulation. The carrier unit 2 of the present invention includes but is not limited to the following description.

[0080] In the first implementation mode, please refer to Figure 1 、 Figures 4 to 6 As shown, the transport unit 2 is a pneumatic clamp 21 , which includes a clamping portion 211 for clamping the front and back sides of the battery cell M1 and a driving source 212 for driving the clamping portion 211 to move along a first direction.

[0081] It should be noted that the pneumatic clamp 21 is not only applicable to Figure 1 The cleaning unit 1 shown drives the battery cell M1 to move in the up and down direction. After rotating the pneumatic clamp 21 by 90 degrees, it can also be used for Figure 9 The cleaning unit 1 shown drives the battery cell M1 to move in the horizontal direction.

[0082] The clamping portion 211 includes a pair of jaws 2111 for clamping the front and back sides of the battery cell M1, and a valve 2112 for switching the jaws 2111 between a clamped and open state. The jaws 2111 are designed to be no larger than the width of the battery cell M1 in at least one direction, perpendicular to the arrangement of the jaws 2111. This design ensures that, after the battery cell M1 is secured by the clamping portion 211, two opposing sides are always exposed, facilitating cleaning.

[0083] The clamping jaw 2111 includes a clamping piece and a buffering pad located on one side of the clamping piece facing the other clamping piece. The buffering pad is in flexible contact with the battery cell M1 to avoid damaging the film layers on the front and back sides of the battery cell M1.

[0084] The linkage between the air valve 2112 and the clamping jaws 2111 is a common technique in the art, and any linkage method can be used, which will not be described in detail here. The air valve 2112 opens the pair of clamping jaws 2111, and the battery cell M1 to be processed is placed between the pair of clamping jaws 2111. The air valve 2112 then switches the pair of clamping jaws 2111 to a clamping position, firmly securing the battery cell M1 in the middle. At this point, the two opposing sides of the battery cell M1 are exposed outward.

[0085] In one embodiment, when the air valve 2112 is in the open state, the pair of jaws 2111 are driven to separate from each other. When the two jaws are in the open state, the battery cell M1 can be placed between the pair of jaws 2111 or the battery cell M1 can be removed. When the air valve 2112 is in the closed state, the pair of jaws 2111 are in a clamping state, firmly fixing the battery cell M1.

[0086] It should be noted that the battery cell M1 cleaned by the present invention can be a single battery cell M1 or a stack of multiple battery cells M1. Preferably, after the multiple battery cells M1 are stacked, they are fixed together on the clamping portion 211 for insulation. On the one hand, this improves cleaning efficiency and achieves side insulation. On the other hand, the multiple battery cells M1 are stacked to form a whole, and each battery cell M1 bears the stress together, which can effectively reduce the side damage of the battery cell M1 during the cleaning process.

[0087] To ensure that the edges of the multiple cells M1 are aligned, the multiple cells M1 can be manually aligned or with the help of a positioning tool M2. The structure of the positioning tool M2 is not limited as long as it can achieve alignment of the multiple cells M1.

[0088] The driving source 212 is a telescopic cylinder. The telescopic cylinder drives the clamping portion 211 to move in the first direction (extend or retract), and the clamping portion 211 drives the battery cell M1 to move in the first direction, so that the side of the battery cell M1 and the cleaning wipe 12 are rubbed and cleaned, thereby removing the film layer on the side.

[0089] Considering that cleaning liquid may be injected into the cleaning tank 11, in order to prevent the pneumatic clamp 21 from being corroded, the part of the pneumatic clamp 21 extending into the cleaning tank 11 is preferably made of a material that is resistant to oxidation, machinability, heat resistance and deformation resistance, such as polytetrafluoroethylene, polymethyl methacrylate, polyvinyl chloride and polyphenylsulfone.

[0090] In the second implementation, please refer to Figures 9 to 14 As shown, the transport unit 2 is a conveyor belt 22, which is located between two rows of cleaning wipes 12, and the conveyor belt 22 extends along a first direction, driving the battery cell M1 placed on the conveyor belt 22 to move along the first direction, so that the side of the battery cell M1 rubs against the cleaning wipes 12 to achieve side insulation.

[0091] In the present invention, the conveyor belt 22 is a belt conveyor belt or a roller transmission roller.

[0092] Taking into account that cleaning liquid may be injected into the cleaning tank 11, in order to avoid corrosion of the conveyor belt 22, the part of the conveyor belt 22 extending into the cleaning tank 11 is preferably made of a material with oxidation resistance, machinability, heat resistance and deformation resistance, such as polytetrafluoroethylene, polymethyl methacrylate, polyvinyl chloride and polyphenylsulfone materials.

[0093] The present invention further provides a cell system 200, comprising at least one cell device 100, and performing insulation treatment on the side edges of the cell M1 to achieve side insulation.

[0094] With the advancement of battery technology, the size of battery cells M1 has diversified. Furthermore, with the development and prevalence of half-cell and shingled battery assemblies, the shape of battery cells M1 has gradually changed from the traditional square to a rectangular shape. To accommodate cleaning of battery cells M1 of varying sizes and the sides of half-cell batteries of varying sizes, the battery cell system 200 of the present invention includes at least two battery cell devices 100, each of which has two different cleaning modules with different distances between the rows of cleaning wipes 12.

[0095] Taking the processing of a rectangular cell M1 as an example, the distance between the two rows of cleaning wipes 12 in one cell device 100 matches the distance between a pair of side edges (e.g., the long edges) of the cell M1. That is, the distance between the flexible wipes 122 of the two rows of cleaning wipes 12 is 1 to 1.2 times the distance between the pair of side edges (e.g., the long edges). The distance between the two rows of cleaning wipes 12 in the other cell device 100 matches the distance between the other pair of side edges (e.g., the short edges) of the cell M1. That is, the distance between the flexible wipes 122 of the two rows of cleaning wipes 12 is 1 to 1.2 times the distance between the pair of side edges (e.g., the short edges). In this way, both pairs of side edges of the cell M1 can be processed using the two cell devices 100.

[0096] In one embodiment, all cleaning units 1 are referenced Figure 1 As shown, the cleaning wipes 12 extend along the height direction of the cleaning tank 11 , and a pneumatic clamp 21 is used as the carrying unit 2 .

[0097] In one embodiment, all cleaning units 1 are referenced Figure 9 As shown, the cleaning wipes 12 extend in the horizontal direction, and a conveyor belt 22 or a pneumatic clamp 21 is used as the carrying unit 2 .

[0098] When the two transport units 2 are both conveyor belts 22 , the widths of the conveyor belts 22 that carry the battery cell M1 through the two cleaning units 1 are different, so that the battery cell M1 can be transported stably.

[0099] Preferably, a rotating platform 23 is provided between the two carrier units 2. The cell M1 exiting the upstream cell device 100 is rotated 90° on the rotating platform 23 and then enters the downstream cell device 100 to perform insulation treatment on the other pair of side edges to achieve side insulation.

[0100] In another embodiment, part of the cleaning unit 1 refers to Figure 1 As shown, a pneumatic clamp 21 is used as the carrier unit 2; the other part of the cleaning unit 1 is referred to Figure 9 As shown, a pneumatic clamp 21 or a conveyor belt 22 is used as the transport unit 2. The mixed use of the two types of battery cell devices 100 can be more flexible in application site.

[0101] Preferably, Figure 1 The cell device 100 is shown in FIG. Figure 9 The upstream of the cell device 100 is more conducive to connecting with subsequent processes to form a smooth production line.

[0102] In addition, each cell device 100 uses a separate cleaning tank 11 , and each cell device 100 is an independent processing device. Alternatively, the cleaning tanks 11 of multiple cell devices 100 are combined into one cleaning tank 11 .

[0103] The cell system 200 further includes an auxiliary cleaning device 300 located downstream of the cell device 100 to further clean or dry the cell M1 .

[0104] The auxiliary cleaning device 300 includes an auxiliary cleaning tank 31, a cleaning pipe 32 located in the auxiliary cleaning tank 31, a nozzle 33 connected to the cleaning pipe 32, a delivery unit 34 for providing cleaning liquid or cleaning gas to the cleaning pipe 32, and a discharge unit connected to the auxiliary cleaning tank 31 to discharge waste cleaning liquid or waste gas.

[0105] The material of described auxiliary cleaning tank 31 can refer to the material of cleaning tank 11, but both materials can be the same or different.The material of cleaning pipe 32, nozzle 33 can refer to the material of cleaning wipe 12, but their material can be the same or different.

[0106] In one embodiment, the cleaning tubes 32 are arranged in two rows spaced apart, and the spray direction of the nozzles 33 in each row is toward the space between the two rows. The battery cell M1 is placed between the two rows of cleaning tubes 32 and the cleaning liquid or cleaning gas is sprayed on the battery cell M1.

[0107] In another embodiment, the cleaning tubes 32 are arranged in two rows spaced apart, and the spraying directions of the nozzles 33 in the two rows are both toward a side perpendicular to the arrangement direction of the two rows, spraying cleaning liquid or cleaning gas onto the battery cells M1 located on that side.

[0108] When the delivery unit 34 delivers cleaning liquid to the cleaning pipe 32, it can spray the cleaning liquid onto the battery cell M1 through the nozzle 33 to further clean it. In this case, the auxiliary cleaning device 300 is essentially a cleaning tank. When the delivery unit 34 delivers cleaning gas to the cleaning pipe 32, it can dry the battery cell M1. In this case, the auxiliary cleaning device 300 is essentially a drying tank.

[0109] Furthermore, the auxiliary cleaning device 300 further includes at least one of a heating component and an ultrasonic component located in the auxiliary cleaning tank 31 .

[0110] The heating component can be used when cleaning with a cleaning solution to achieve high-temperature cleaning and improve the cleaning effect. The heating component can also be used when drying to dry the battery cell M1 as quickly as possible.

[0111] The ultrasonic component is used in conjunction with the cleaning liquid to clean the battery cell M1, which can improve the cleaning efficiency.

[0112] The following will be based on Figure 6 The cell system 200 is shown, and its cleaning method is described in detail.

[0113] S11 uses a pneumatic clamp 21 to clamp and secure the cell M1, then inserts it into the first cleaning tank 11. The first cleaning tank 11 contains a cleaning solution consisting of 50g / L to 150g / L sulfuric acid and 100g / L to 200g / L hydrogen peroxide. The heating component is activated, and the temperature is controlled at approximately 45°C to 50°C. After soaking for 5 to 10 minutes (soaking is optional), the cell M1 is moved back and forth in the vertical direction at a speed of 5m / min for approximately 60 seconds to etch away the film layer on the side of the cell M1.

[0114] S12: After completing step S11, the air valve 2112 is opened to release the cell M1 from the pneumatic clamp 21. The cell M1 is removed and stacked using the positioning fixture M2. The cell M1 is then flipped 90° and placed between a pair of clamps 2111. After clamping the cell M1, the air valve 2112 is closed. The other two sides of the cell M1 are then prepared for friction and chemical etching.

[0115] S13 clamps and secures the cell M1, then places it into the second cleaning tank 11. The second cleaning tank 11 contains a cleaning solution consisting of 50g / L to 150g / L sulfuric acid and 100g / L to 200g / L hydrogen peroxide. The cleaning solution is maintained at approximately 30°C and is moved back and forth at a speed of 5m / min for 60 seconds, removing any exposed conductive layer from the sides.

[0116] After step S13 is completed, the auxiliary cleaning tank 31 is loaded for cleaning process. The auxiliary cleaning tank 31 is actually a cleaning tank. The operating conditions of the cleaning process are water temperature 30℃, speed 5m / min, water pressure 1.5Kg / cm 2 The operation time is 60 seconds, and the battery cell M1 is moved back and forth in the up and down directions to clean the battery cell M1.

[0117] After step S14 is completed, the auxiliary cleaning tank 31 is loaded into the drying process. The auxiliary cleaning tank 31 is actually a drying tank. The drying process operating conditions are a drying temperature of 30°C, a reciprocating motion in the up and down direction at a speed of 2m / min, and a spray pressure of 1.5Kg / cm 2 The operation time is 60 seconds, and the battery cell M1 is moved back and forth in the up and down directions to dry the battery cell M1.

[0118] The following will be based on Figure 14 The cell system 200 is shown, and its cleaning method is described in detail.

[0119] S21 uses a conveyor belt 22 to load the cell M1 into the first cleaning tank 11 and drive the cell M1 horizontally. The first cleaning tank 11 contains a cleaning solution consisting of HF with a volume concentration of 10mL / L to 50mL / L, HCl with a volume concentration of 50mL / L to 100mL / L, and HNO3 with a volume concentration of 5mL / L to 50mL / L. The heating component is activated and the temperature is controlled at approximately 35°C. After soaking for 5 to 10 minutes (soaking is optional), the cell M1 is moved horizontally at a speed of 2m / min to etch away the film layers on a pair of side edges of the cell M1.

[0120] S22 After completing step S21, the cell M1 is rotated 90° by the rotating table 23 to prepare for the friction and chemical etching process on the other two sides of the cell M1.

[0121] S23 loads the cell M1 into the second cleaning tank 11 via the next conveyor belt 22, moving the cell M1 horizontally. The second cleaning tank 11 contains a cleaning solution consisting of HF (10 mL / L to 50 mL / L), HCl (50 mL / L to 100 mL / L), and HNO3 (5 mL / L to 50 mL / L). The cleaning solution is maintained at approximately 25°C and etched away at a speed of 2 m / min. The conductive layer on the other side of the cell M1 is removed.

[0122] After completing step S23, the cell M1 is loaded into the auxiliary cleaning tank 31 via the next conveyor belt 22 for cleaning. The auxiliary cleaning tank 31 is actually a cleaning tank. The cleaning process operating conditions are water temperature 30°C, speed 2m / min, water pressure 1.5Kg / cm 2 , while the battery cell M1 moves in the horizontal direction, the battery cell M1 is cleaned.

[0123] After step S25 is completed, the battery cell M1 is loaded into another auxiliary cleaning tank 31 through the next conveyor belt 22 for drying. The auxiliary cleaning tank 31 is actually a drying tank. The operating conditions of the drying process are a drying temperature of 30°C, a moving speed of 2m / min, and a spray pressure of 1.5Kg / cm 2 , drying the battery cell M1.

[0124] In summary, the present invention provides two rows of cleaning wipes 12 spaced apart in the cleaning unit 1, and the carrier unit 2 drives the battery cell M1 to move along the first direction between the two adjacent rows of cleaning wipes 12, so that the cleaning wipes 12 can frictionally clean the side of the battery cell M1, thereby maintaining batch production and obtaining battery cells with insulating structures on the side.

[0125] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A battery cell side insulation processing device, characterized in that: include: a cleaning unit comprising a cleaning tank and at least one cleaning module located in the cleaning tank, wherein the cleaning module comprises two rows of cleaning wipes extending along a first direction, the two rows of cleaning wipes being spaced apart along a second direction perpendicular to the first direction; The carrying unit drives the battery sheet to move along the first direction between the two rows of cleaning wipes, so that the cleaning wipes can achieve insulation treatment on the side edges of the battery sheet.

2. The battery cell side insulation processing device according to claim 1, characterized in that: The cleaning wipe includes at least one cleaning roller fixed in the cleaning tank and a flexible wipe located on the cleaning roller.

3. The battery cell side insulation processing device according to claim 2, characterized in that: The distance between the flexible wipes of the two rows of cleaning wipes is 10 mm to 30 mm, or the distance between the flexible wipes of the two rows of cleaning wipes is 1 to 1.2 times the width of the battery sheet in one direction.

4. The battery cell side insulation processing device according to claim 1, characterized in that: The cleaning wipe extends along a height direction of the cleaning tank, or the cleaning wipe extends along a horizontal direction of the cleaning tank.

5. The battery cell side insulation processing device according to claim 1, characterized in that: The cleaning wipe is no higher than the highest liquid level line of the cleaning tank.

6. The battery cell side insulation processing device according to claim 1, characterized in that: The cleaning unit further comprises: an infusion port communicating with the cleaning tank, a drainage port communicating with the cleaning tank; and / or a heating element for providing heat to the cleaning tank; and / or A gas distribution assembly for supplying clean gas to the cleaning tank; and / or Ultrasonic components.

7. The battery cell side insulation processing device according to claim 6, characterized in that: The infusion port, the drainage port, the heating component, the air distribution component, and the ultrasonic component are all located below the cleaning wipe.

8. The battery cell side insulation processing device according to any one of claims 1 to 7, characterized in that: The carrying unit is a pneumatic clamp, which includes a clamping part for clamping the front and back of the battery sheet and a driving source for driving the clamping part to move along the first direction; The clamping portion includes a pair of clamping jaws for clamping the front and back surfaces of the battery cell, and an air valve for controlling the switching of the pair of clamping jaws between a clamped state and an open state. The size of the clamping jaws in a direction perpendicular to the arrangement direction of the pair of clamping jaws is no larger than the width of the battery cell in at least one direction. The clamping jaws include a clamping piece and a buffering pad located on one side of the clamping piece facing the other clamping piece. The driving source is a telescopic cylinder.

9. The battery cell side insulation processing device according to any one of claims 1 to 7, characterized in that: The carrying unit is a conveyor belt, the conveyor belt is located between two rows of cleaning wipes, and the conveyor belt extends along a first direction.

10. A battery cell side insulation processing system, characterized in that: It comprises the battery cell side insulation processing device as described in any one of claims 1 to 9.

11. The battery cell side insulation processing system according to claim 10, characterized in that: The battery cell side insulation processing system includes at least two battery cell side insulation processing devices, wherein the two battery cell side insulation processing devices have two different cleaning modules, and the distances between the two rows of cleaning wipes of the two different cleaning modules are different.

12. The battery cell side insulation processing system according to claim 11, characterized in that: The distance between the two rows of cleaning wipes in one battery cell side insulation processing device is adapted to the distance between a pair of side edges of the battery cell; the distance between the two rows of cleaning wipes in the other battery cell side insulation processing device is adapted to the distance between the other pair of side edges of the battery cell.

13. The battery cell side insulation processing system according to claim 11, characterized in that: The cleaning wipes in all cleaning units extend along the height direction of the cleaning tank, and the carrying unit is a pneumatic clamp; Alternatively, the cleaning wipes in all cleaning units extend in the horizontal direction, and the carrying unit is a pneumatic clamp or a conveyor belt; Alternatively, the cleaning wipes in some cleaning units extend along the height direction of the cleaning tank, and the carrying unit is a pneumatic clamp; the cleaning wipes in other cleaning units extend along the horizontal direction, and the carrying unit is a pneumatic clamp or a conveyor belt.

14. The battery cell side insulation processing system according to claim 13, characterized in that: The carrying units of the two cleaning units adapted to the upstream and downstream are both conveyor belts, and the widths of the conveyor belts that drive the battery cells to pass through the two cleaning units are different.

15. The battery cell side insulation processing system according to claim 13, characterized in that: The carrying units of the two cleaning units adapted to the upstream and downstream are both conveyor belts, and the battery cell side insulation processing system also includes a rotating table located between the two conveyor belts for rotating the battery cell 90°.

16. The battery cell side insulation processing system according to claim 10, characterized in that: The battery cell side insulation treatment system also includes an auxiliary cleaning device located downstream of the battery cell side insulation treatment device, the auxiliary cleaning device including an auxiliary cleaning tank, a cleaning pipe located in the auxiliary cleaning tank, a nozzle connected to the cleaning pipe, a delivery unit for supplying cleaning liquid or cleaning gas to the cleaning pipe, and a discharge unit connected to the auxiliary cleaning tank for discharging waste cleaning liquid or waste gas; The cleaning pipes are arranged in two rows spaced apart, and the spraying direction of the nozzles in each row is toward between the two rows, or the spraying direction of the nozzles in the two rows is toward a side perpendicular to the arrangement direction of the two rows.

17. The battery cell side insulation processing system according to claim 16, characterized in that: The auxiliary cleaning device further includes at least one of a heating component and an ultrasonic component located in the cleaning tank.

Images