Solder print processing device and solder print processing method

Abstract

The invention relates to the technical field of battery production, and particularly discloses a welding mark processing device and a welding mark processing method.The welding mark processing device comprises an acid pickling assembly and a wiping assembly, the acid pickling assembly comprises a titrating head, the titrating head is used for titrating a pickling solution to a welding mark on a switching piece, and the pickling solution can remove welding slag and oxide on the welding mark; and the wiping assembly comprises a wiping piece, and the wiping piece is used for wiping the pickling solution on the welding marks. Welding slag and oxide on a welding mark are removed by titrating the welding mark with a pickling solution through a titrating head on the pickling assembly, it is ensured that the welding slag and surface blackening do not exist on the surface of the welding mark, the pickling solution is wiped through the wiping assembly, and the pickling solution and moisture are prevented from corroding parts around the welding mark.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a welding print processing device and a welding print processing method. Background Art

[0002] In the manufacturing process of secondary batteries, the cell tabs are usually connected to the top cover poles by welding through adapters. For example, in the process of laser welding, copper oxide and cuprous oxide will be generated under the high temperature of laser welding for copper adapters. The weld marks and welding slag after laser welding of copper adapters contain the above copper oxides. The above copper oxides will eventually decompose into black copper oxide on the weld mark surface due to the influence of multiple factors such as electrolyte and formation current during the formation stage, and will continue to accumulate, causing the weld mark to turn completely black.

[0003] In response to the above problems, in the prior art, a barrier is usually provided on the welding surface, such as a protective tape, to physically isolate the welding surface from the battery cell to prevent welding slag that may remain on the welding surface from falling into the battery cell and causing a safety accident. However, with the use of the battery, the barrier immersed in the electrolyte may be separated from the welding surface due to factors such as electrolyte corrosion, thereby becoming ineffective. At the same time, the barrier cannot prevent the problem of blackening of the welding surface of the copper adapter during the formation process. Summary of the invention

[0004] The object of the present invention is to provide a weld mark processing device and a weld mark processing method, so as to solve the problem of blackening of the weld mark surface while cleaning the welding slag on the weld mark surface.

[0005] The present invention provides a welding and printing processing device, comprising a pickling operation station and a wiping operation station, wherein the wiping operation station is arranged as a post-process of the pickling operation station;

[0006] The pickling operation station is provided with a pickling component, and the pickling component includes a titration head, and the titration head is used to titrate a pickling liquid to the weld mark on the adapter sheet, and the pickling liquid can remove welding slag and oxides on the weld mark;

[0007] The wiping operation station is provided with a wiping assembly, and the wiping assembly includes a wiping piece, and the wiping piece is used to wipe the pickling liquid on the weld mark.

[0008] As a preferred technical solution of the weld mark processing device, the pickling component also includes a reaction sleeve, the reaction sleeve forms a reaction space, the reaction sleeve is placed on the adapter plate and the weld mark is located in the reaction space, and the titration head titrates the pickling solution into the reaction space.

[0009] As a preferred technical solution for the welding and printing processing device, the reaction sleeve includes an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are spaced apart to form the reaction space, the inner cylinder and the outer cylinder are connected by a plurality of connecting blocks, the connecting blocks extend along the length direction of the reaction sleeve, the upper end surface of the connecting block is lower than the upper end surfaces of the inner cylinder and the outer cylinder, and the lower end surface of the connecting block is higher than the lower end surfaces of the inner cylinder and the outer cylinder.

[0010] As a preferred technical solution for the weld print processing device, the pickling assembly also includes a fixed shaft and a rotating shaft, the fixed shaft is coaxially arranged with the weld print, the fixed shaft is used to drive the rotating shaft to rotate, the rotating shaft includes an upper section, an extension section and a lower section, the upper section is coaxial with the fixed shaft and is used to be connected to the fixed shaft, the extension section extends radially along the upper section, the lower section is fixedly connected to the extension section, the lower section is parallel to the upper section and is located above the reaction space, and the titration head is connected to the bottom of the lower section.

[0011] As a preferred technical solution of the weld mark processing device, the outer diameter of the inner cylinder is smaller than the inner diameter of the weld mark, and the inner diameter of the outer cylinder is larger than the outer diameter of the weld mark.

[0012] As a preferred technical solution for the weld mark processing device, the gap value between the outer cylinder and the inner cylinder is 2 to 4 times the weld mark width value.

[0013] As a preferred technical solution of the welding and printing processing device, the cleaning component also includes:

[0014] A cleaning spindle, the cleaning spindle is a hollow structure, two connecting shafts are fixedly connected to the two sides of the cleaning spindle, the ends of the two connecting shafts are fixedly connected to fixing plates, the lower ends of the two fixing plates are rotatably connected to clamping plates through hinge shafts, and the two clamping plates are used to clamp or release the cleaning piece;

[0015] The cylinder is placed in the cleaning spindle, and the output shaft of the cylinder is hingedly connected to two pull rods, and the two pull rods are respectively hingedly connected to the two clamping plates to drive the clamping plates to clamp or release the cleaning piece.

[0016] As a preferred technical solution for the weld print processing device, it also includes a drying operation station, which is arranged as a post-process of the wiping operation station. The drying operation station is provided with a drying component, which includes a blowing part and a suction part. The blowing part is used to blow air toward the weld print surface, and the suction part is used to suck the gas from the weld print surface.

[0017] The present invention provides a welding mark processing method, using the welding mark processing device of any of the above schemes to clean the welding mark, and the welding mark processing method comprises:

[0018] titrating a preset amount of pickling solution to the weld mark and waiting for a first preset time;

[0019] Wipe off the pickling fluid on the weld mark.

[0020] As a preferred technical solution of the welding mark treatment method, the pickling solution is an inorganic weak acid, and the concentration is greater than or equal to 95%;

[0021] Alternatively, the pickling solution is an organic weak acid.

[0022] As a preferred technical solution of the welding mark processing method, the preset amount is 0.04ml-0.2ml, and the first preset time is less than or equal to 10s.

[0023] As a preferred technical solution of the welding printing processing method, the preset amount is 0.1 ml and the first preset time is 2 s.

[0024] As a preferred technical solution of the weld mark treatment method, after wiping off the pickling liquid on the weld mark, the method further includes:

[0025] Blowing air at a preset air volume and a preset temperature toward the weld surface for a second preset time, and sucking gas from the weld surface for a third preset time;

[0026] The preset air volume is 20L / min-40L / min, the preset temperature is 55°C-65°C, the second preset time is 0.5s-2s, and the third preset time is 0.5s-2s.

[0027] As a preferred technical solution of the welding and printing processing method, the preset air volume is 30L / min, the preset temperature is 60°C, the second preset time is 1s, and the third preset time is 1s.

[0028] The beneficial effects of the present invention are:

[0029] The present invention provides a weld mark processing device, which uses a titration head on a pickling component to titrate a pickling liquid on the weld mark to remove welding slag and oxides on the weld mark, ensuring that there is no welding slag and blackening on the surface of the weld mark, and uses a cleaning component to wipe the pickling liquid to avoid corrosion of parts around the weld mark by the pickling liquid and moisture.

[0030] The present invention provides a weld mark processing method, which uses the weld mark processing device of the present invention to sequentially pickle and clean the weld mark, thereby removing welding slag and surface blackening while ensuring the cleanliness of the weld mark and preventing residual pickling liquid and moisture from corroding parts around the weld mark. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the pickling operation station in an embodiment of the present invention;

[0032] Figure 2 Figure 1 A partial enlarged view of part A;

[0033] Figure 3 A cross-sectional view of a pickling assembly in an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of the positional relationship between the reaction sleeve and the weld mark in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the wiping operation station in an embodiment of the present invention;

[0036] Figure 6 for Figure 5 A partial enlarged view of part B;

[0037] Figure 7 A cross-sectional view of a cleaning component according to an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of a drying operation station in an embodiment of the present invention;

[0039] Fig. 9 for Figure 8 A partial enlarged view of part C in the middle;

[0040] Fig.10 It is a flow chart of the welding printing processing method in an embodiment of the present invention;

[0041] Fig.11 The figure is a comparison chart of the electrochemical performance of a battery cell after the weld mark is cleaned by the weld mark treatment method in an embodiment of the present invention and a battery cell without treatment.

[0042] In the figure:

[0043] 100, conveyor belt; 200, adapter; 210, welding stamp;

[0044] 1. Pickling assembly; 11. Fixed shaft; 12. Rotating shaft; 121. Upper section; 122. Extension section; 123. Lower section; 13. Titration head; 14. Reaction sleeve; 141. Inner cylinder; 142. Outer cylinder; 143. Connecting block;

[0045] 2. Wipe assembly; 21. Wipe main shaft; 22. Connecting shaft; 23. Fixing plate; 24. Articulated shaft; 25. Clamping plate; 26. Wipe piece; 27. Cylinder; 271. Output shaft; 28. Pull rod;

[0046] 3. Drying component; 31. Blowing component; 311. Air nozzle; 32. Suction component; 321. Suction nozzle. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0050] For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] In the manufacturing process of secondary batteries, the cell pole ear is usually connected to the top cover pole by welding through an adapter. For example, in the process of using the laser welding process, for the copper adapter, copper oxide and cuprous oxide will be generated under the high temperature of laser welding. The weld mark and welding slag of the copper adapter after laser welding contain the above copper oxides. The above copper oxides will eventually decompose into black copper oxide on the weld mark surface due to multiple factors such as electrolyte and formation current during the formation stage, and continue to accumulate, causing the weld mark to be completely black. In response to the above problems, in the prior art, it is usually adopted to set a barrier on the welding surface, such as a protective tape, to physically isolate the welding surface from the battery cell to prevent the welding slag that may remain on the welding surface from falling into the battery cell and causing a safety accident. However, with the use of the battery, the barrier immersed in the electrolyte may be separated from the welding surface due to factors such as electrolyte erosion, thereby failing. At the same time, the barrier cannot prevent the problem of blackening of the surface of the copper adapter welding surface during the formation process.

[0053] Based on the above problems, Figure 1-Figure 9 As shown, one embodiment of the present application provides a weld mark processing device for cleaning the weld mark 210 on the adapter 200. The weld mark processing device is provided with a pickling operation position and a wiping operation position. The wiping operation position is set as a post-process located at the pickling operation position. A pickling component 1 is provided at the pickling operation position. The pickling component 1 includes a titration head 13. The titration head 13 is used to titrate the pickling liquid on the weld mark 210 on the adapter 200. The pickling liquid can remove the welding slag and oxide on the weld mark 210. The post-process of the pickling operation position is a wiping operation position. The wiping operation position is provided with a wiping component 2. The wiping component 2 includes a wiping member 26. The wiping member 26 is used to wipe the pickling liquid on the weld mark 210. The wiping member 26 in this embodiment can be set as dust-free paper or cotton. The pickling liquid is titrated to the weld mark 210 by the titration head 13 on the pickling component 1 to remove the welding slag and oxide on the weld mark 210, ensuring that there is no welding slag on the surface of the weld mark 210 and the surface is blackened. The pickling liquid is wiped clean by the cleaning component 2, thereby preventing the pickling liquid and moisture from corroding the parts around the weld mark.

[0054] Furthermore, the weld mark processing device also includes a drying operation position, which is set as a post-process of the wiping operation position, and a drying component 3 is provided at the drying operation position, and the drying component 3 includes a blowing member 31 and an air suction member 32, wherein the blowing member 31 is used to blow air to the surface of the weld mark 210, and the air suction member 32 is used to suck the gas on the surface of the weld mark 210. The blowing member 31 of the drying component 3 blows air to the surface of the weld mark 210 to accelerate the drying of the surface of the weld mark 210, and the air suction member 32 of the drying component 3 sucks the gas on the surface of the weld mark 210, and sucks the pickling liquid and moisture remaining on the surface of the weld mark 210, so as to prevent the residual pickling liquid and moisture from corroding the weld mark 210 and the surrounding parts.

[0055] It should be pointed out that the specific layout of the pickling station, cleaning station and drying station mentioned in this embodiment is determined according to the specific structure of the production line. For example, the pickling station, cleaning station and drying station can be set at the same station, and by switching the pickling component 1, the cleaning component 2 and the drying component 3, multiple processes can be completed at the same station. Alternatively, the pickling station, the cleaning station and the drying station are respectively set at independent stations and arranged according to the path of logistics transportation. In this embodiment, it is preferred to set the pickling station, the cleaning station and the drying station at independent stations respectively. Please refer to the details. Figure 1 , Figure 5 and Figure 8 As shown, the pickling station, the wiping station and the drying station are respectively arranged at independent stations, the wiping assembly 2 is located downstream of the pickling assembly 1 along the conveying direction of the conveyor belt 100, and the drying assembly 3 is located downstream of the wiping assembly 2 along the conveying direction of the conveyor belt 100. The adapter sheet 200 is transported by the conveyor belt 100, so that the adapter sheet 200 passes through the pickling station, the wiping station and the drying station in sequence, and is pickled by the corresponding pickling assembly 1, and the pickling liquid on the weld mark 210 is wiped by the wiping assembly 2, and finally the drying assembly 3 blows air to the surface of the weld mark 210 and sucks at the same time.

[0056] According to some embodiments of this application, please refer to Figure 8-Figure 9 As shown, the blowing member 31 is provided with a gas nozzle 311, through which the flow rate of the blown gas is increased to accelerate the drying of the weld mark 210. The suction member 32 is provided with a suction nozzle 321, which is set in a flat mouth shape to ensure that the acid gas and moisture around the weld mark 210 are quickly sucked.

[0057] In some embodiments, Figure 1-Figure 4As shown, the pickling assembly 1 also includes a reaction sleeve 14, which is a structure with two ends open and a reaction space formed. The reaction sleeve 14 is placed on the adapter 200 and the weld mark 210 is located in the reaction space, and the titration head 13 titrates the pickling solution into the reaction space. By setting the reaction sleeve 14, it is ensured that the pickling solution can be accurately titrated on the surface of the weld mark 210 and the heat-affected zone around the weld mark 210, so that the surface of the weld mark 210 and the heat-affected zone can be covered by the pickling solution, and the pickling solution is reduced to overflow to the area outside the reaction space, ensuring that the weld mark 210 and the oxides in the heat-affected zone react fully with the pickling solution, thereby eliminating welding slag and avoiding the occurrence of blackening at the weld mark 210. The structure of the reaction sleeve 14 and the shape of the reaction space are determined according to the structure and shape of the weld mark 210, for example, the weld mark 210 can be a long strip, a hollow shape or a circular ring shape. In this embodiment, the more common circular ring weld mark 210 will be taken as an example for expansion. It should be pointed out that the reaction sleeve 14 should be made of acid-resistant materials to avoid reaction with the pickling solution. For example, the reaction sleeve 14 can be made of materials such as polytetrafluoroethylene.

[0058] According to some embodiments of this application, please continue to refer to Figure 1-Figure 4 As shown, the reaction sleeve 14 includes an inner cylinder 141 and an outer cylinder 142, both of which are hollow cylindrical structures, and the inner cylinder 141 is coaxially arranged inside the outer cylinder 142, and is spaced apart from the outer cylinder 142 to form a reaction space. The inner cylinder 141 and the outer cylinder 142 are connected by a plurality of connecting blocks 143, which extend along the length direction of the reaction sleeve 14, and a plurality of connecting blocks 143 are spaced apart along the periphery of the inner cylinder 141. The upper end surface of the connecting block 143 is lower than the upper end surface of the inner cylinder 141 and the outer cylinder 142, so as to ensure that the pickling solution can be titrated in the reaction space and avoid waste of the pickling solution. The lower end surface of the connecting block 143 is higher than the lower end surfaces of the inner cylinder 141 and the outer cylinder 142, and the upper surface of the weld mark 210 is located below the lower end surface of the connecting block 143, ensuring that the pickling liquid can fully contact the weld mark 210 to ensure complete reaction. During the pickling process, the titration head 13 moves along the circumference of the reaction space, and the pickling liquid is titrated into the reaction space at the same time. The pickling liquid falls to the bottom of the reaction space and fills the space between the inner cylinder 141 and the outer cylinder 142 under the restriction of the inner cylinder 141 and the outer cylinder 142, so as to fully react with the weld mark 210 and the heat-affected zone to ensure complete reaction.

[0059] According to some embodiments of the present application, the circumferential movement of the titration head 13 along the reaction space is achieved by the following structure: Figure 2-Figure 3As shown, the pickling assembly 1 also includes a fixed shaft 11 and a rotating shaft 12, and the fixed shaft 11 is coaxially arranged with the weld mark 210 of the annular structure. The fixed shaft 11 is used to drive the rotating shaft 12 to rotate. A driving motor and a coupling (not shown in the figure) are arranged above the fixed shaft 11. The driving motor is connected to the fixed shaft 11 through the coupling and drives the fixed shaft 11 to rotate along its own axis. The rotating shaft 12 includes an upper section 121, an extension section 122 and a lower section 123 that are integrally arranged. The upper section 121 is coaxial with the fixed shaft 11 and is used to be connected to the fixed shaft 11. The connection method is fixed connection through fasteners, or detachable connection is achieved through a quick plug. The extension section 122 extends radially along the upper section 121, the lower section 123 is fixedly connected to the extension section 122, the lower section 123 is parallel to the upper section 121 and is located above the reaction space, and the titration head 13 is connected to the bottom of the lower section 123. During titration, the fixed shaft 11 rotates to drive the rotating shaft 12 to rotate, so that the trajectory of the titration head 13 connected to the lower section 123 matches the reaction space, so that the pickling liquid is evenly titrated into the reaction space. The fixed shaft 11 and the upper section 121 of the rotating shaft 12 in this embodiment are preferably detachably connected, so that the rotating shaft 12 with different extension sections 122 sizes can be replaced to adapt to reaction sleeves 14 of different sizes, thereby meeting the pickling requirements of weld marks 210 of different sizes.

[0060] According to some embodiments of this application, please refer to Figure 3-Figure 4 As shown, the outer diameter of the inner cylinder 141 is smaller than the inner diameter of the weld mark 210, and the inner diameter of the outer cylinder 142 is larger than the outer diameter of the weld mark 210, thereby reducing the requirement for the placement accuracy of the reaction sleeve 14. Figure 4 As shown in R1 in FIG. 1 , the inner diameter of the outer cylinder 142 is as follows: Figure 4 As shown in R2 in FIG. 1 , the gap value between the outer cylinder 142 and the inner cylinder 141 is R2-R1, and the width of the weld mark 210 is as shown in FIG. Figure 4 As shown by H in , R2-R1>H. Considering the width of the heat-affected zone around the weld mark 210, in this embodiment, the gap value between the outer cylinder 142 and the inner cylinder 141 is 2 to 4 times the width of the weld mark 210. Preferably, the gap value between the outer cylinder 142 and the inner cylinder 141 is three times the width of the weld mark 210, that is, R2-R1=3H. On this basis, the gap between the inner diameter of the weld mark 210 and the outer diameter of the inner cylinder 141 is equal to the width of the weld mark 210, and the gap between the outer diameter of the weld mark 210 and the inner diameter of the outer cylinder 142 is equal to the width of the weld mark 210, so as to remove as much oxide as possible from the heat-affected zone during the pickling process, and avoid the problem of residual welding slag in the heat-affected zone and blackening of the weld mark.

[0061] In some embodiments, Figure 5-Figure 7As shown, the wiping assembly 2 also includes a wiping spindle 21 and a cylinder 27. The wiping spindle 21 is a hollow structure, and two connecting shafts 22 are fixedly connected to both sides of the wiping spindle 21. The ends of the two connecting shafts 22 are fixedly connected to fixed plates 23. The lower ends of the two fixing plates 23 are rotatably connected to clamping plates 25 through hinge shafts 24, and the two clamping plates 25 are used to clamp or release the wiping member 26. The cylinder 27 is placed in the wiping spindle 21, and the output shaft 271 of the cylinder 27 is hingedly connected to two pull rods 28, and the two pull rods 28 are respectively hingedly connected to the two clamping plates 25 to drive the clamping plates 25 to clamp or release the wiping member 26. The output shaft 271 of the cylinder 27 is coaxially arranged with the wiping spindle 21, and the output shaft 271 of the cylinder 27 moves upward or downward along the axis of the wiping spindle 21, thereby driving the clamping plates 25 to clamp or release the wiping member 26 through the pull rods 28. After the clamping plate 25 clamps the wiping member 26, the pickling liquid on the surface of the weld mark 210 can be absorbed by pressing, or the surface of the weld mark 210 can be wiped according to a preset trajectory, and the mechanical arm is correspondingly arranged to drive the wiping spindle 21 to move according to the preset trajectory, so as to wipe the surface of the weld mark 210 according to the trajectory. When the wiping member 26 absorbs more pickling liquid, the clamping plate 25 releases the wiping member 26 and re-clamps a new wiping member 26 to achieve replacement.

[0062] According to some embodiments of the present application, Fig.10 As shown, the present application also provides a welding mark processing method, using the welding mark processing device in the above embodiment to clean the welding mark 210, and the welding mark processing method includes the following steps:

[0063] titrating a preset amount of pickling solution to the weld print 210 and waiting for a first preset time;

[0064] Wipe off the pickling liquid on the weld mark 210.

[0065] Specifically, when the pickling solution is titrated on the weld mark 210 for pickling, the manipulator places the reaction sleeve 14 above the weld mark 210, and the driving motor drives the fixed shaft 11 to rotate through the coupling, driving the rotating shaft 12 to rotate, and the titration head 13 evenly titrates the pickling solution into the reaction space, so that the pickling solution completely covers the weld mark 210 and the heat-affected zone in the reaction space. The control method of the pickling solution titration amount is a prior art in the art and is not repeated here. After the first preset time, the manipulator takes away the reaction sleeve 14. The conveyor belt 100 conveys forward and conveys the adapter 200 to the cleaning operation position for cleaning. Alternatively, the pickling component 1 is switched to the cleaning component 2 through a turntable or other structure to clean the weld mark 210 on the adapter 200. The manipulator at the cleaning operation position drives the cleaning member 26 to clean the weld mark 210 in a circular trajectory through the cleaning spindle 21, and the movement speed is 1.5s / circle, and a total of two circles are wiped.

[0066] By using the weld mark processing device of this embodiment to sequentially pickle and clean the weld mark 210, the weld slag and surface blackening can be removed while ensuring that the weld mark 210 is dry, thereby avoiding corrosion of the weld mark 210 and surrounding parts due to residual pickling liquid and moisture.

[0067] According to some embodiments of the present application, after wiping off the pickling liquid on the weld mark 210, the following steps may be further provided:

[0068] Blow air at a preset air volume and a preset temperature toward the surface of the weld mark 210 for a second preset time, and suck the gas on the surface of the weld mark 210 for a third preset time.

[0069] Specifically, after the wiping operation position is finished, the conveyor belt 100 continues to convey forward, and conveys the adapter sheet 200 to the drying operation position for drying. Alternatively, the wiping component 2 is switched to the drying component 3 through a structure such as a turntable to blow air and suck the surface of the weld mark 210 on the adapter sheet 200 at the same time. The blowing component 31 blows air at a preset air volume and preset temperature for a second preset time, and then the suction component 32 sucks the gas on the surface of the weld mark 210 for a third preset time. The relevant structures and methods for controlling the blowing air volume and temperature are prior arts in the art and are not described in detail here.

[0070] The pickling liquid in this embodiment is an inorganic weak acid, and the concentration is greater than or equal to 95%, or the pickling liquid is an organic weak acid. When the pickling liquid is an inorganic weak acid, setting its concentration to be greater than or equal to 95% can prevent the pickling liquid from affecting the humidity in the production environment due to excessive water content. Specifically, the pickling liquid preferably has the characteristics of being both volatile and non-oxidizable, so that it can evaporate quickly during the drying process, while avoiding oxidation and deterioration of the surface of the weld print 210 or the adapter sheet 200 during the reaction process. For example, the pickling liquid can be an organic acid such as acetic acid or oxalic acid, or an inorganic acid such as carbonic acid. Alternatively, the pickling liquid can also be a composite acid, such as a composite acid in which the solute is citric acid and the solvent is methanol. In this embodiment, when the pickling liquid is set to an inorganic weak acid, its concentration is preferably 99%.

[0071] Specifically, the preset titration amount of the pickling solution in this embodiment is 0.04ml-0.2ml, such as 0.04ml, 0.05ml, 0.06ml, 0.07ml, 0.08ml, 0.09ml, 0.1ml, 0.11ml, 0.12ml, 0.13ml, 0.14ml, 0.15ml, 0.16ml, 0.17ml, 0.18ml, 0.19ml or 0.2ml. The first preset time is less than or equal to 10s, such as 10s, 9s, 8s, 7s, 6s, 5s, 4s, 3s, 2s, 1s or 0s. It should be noted that the selection of the preset titration amount of the pickling solution in this embodiment depends on the size of the weld area. For example, for a smaller weld area, the preset titration amount of the pickling solution can be selected within 0.04ml-0.15ml, and the reaction time of the pickling solution decreases with the increase of the selected preset titration amount of the pickling solution. For example, when the preset titration amount of the pickling solution is 0.04ml, the first preset time is 10s. As the preset titration amount of the pickling solution gradually increases, the first preset time correspondingly decreases until it is zero. Under the same weld area, when the preset titration amount of the pickling solution increases to a certain extent, the action time of the manipulator to take away the reaction sleeve is sufficient for the pickling solution to react completely with the weld, and a certain amount of time is also required in the process from the pickling operation position to the wiping operation position. Therefore, it can be ensured that the pickling solution has completely reacted with the weld when it reaches the wiping operation position, so there is no need to set an additional waiting time at the pickling operation position, that is, the first preset time can be set to 0s.

[0072] In this embodiment, taking into account the production cost and production efficiency, the preset titration amount of the pickling solution is preferably set to 0.1 ml, and the corresponding first preset time is set to 2 s.

[0073] There are also technical solutions in the prior art for covering weld marks by dispensing glue, but the dispensing glue solution requires a large amount of glue for a single weld, and the unit price of hot melt glue is high, which ultimately leads to a high production cost for a single weld. The solution in this embodiment requires a small amount of pickling solution for a single weld, and the unit price of the pickling solution used is also lower than the unit price of hot melt glue. After actual verification and calculation, the production cost of a single weld treated with the weld mark processing method in this embodiment is compared with the production cost of a single weld treated with the dispensing glue solution in the traditional technology. The weld mark processing method in this embodiment can save more than 90% of the cost of a single weld compared to using the traditional technology to process the weld mark.

[0074] Specifically, when blowing air to the welding stamp 210, the preset air volume is 20L / min-40L / min, such as 20L / min, 21L / min, 22L / min, 23L / min, 24L / min, 25L / min, 26L / min, 27L / min, 28L / min, 29L / min, 30L / min, 31L / min, 32L / min, 33L / min, 34L / min, 35L / min, 36L / min, 37L / min, 38L / min, 39L / min or 40L / min. The preset temperature is 55°C-65°C, such as 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, 61°C, 62°C, 63°C, 64°C or 65°C. The second preset time is 0.5s-2s, such as 0.5s, 0.6s, 0.7s, 0.8s, 0.9s, 1s, 1.1s, 1.2s, 1.3s, 1.4s, 1.5s, 1.6s, 1.7s, 1.8s, 1.9s or 2s. The third preset time is 0.5s-2s, such as 0.5s, 0.6s, 0.7s, 0.8s, 0.9s, 1s, 1.1s, 1.2s, 1.3s, 1.4s, 1.5s, 1.6s, 1.7s, 1.8s, 1.9s or 2s. In this embodiment, it has been actually verified that when the preset air volume is 30 L / min, the preset temperature is 60°C, the second preset time is 1s and the third preset time is 1s, the drying effect on the weld mark 210 and the heat-affected zone is better. Therefore, the preset air volume is preferably 30 L / min, the preset temperature is preferably 60°C, the second preset time is preferably 1s and the third preset time is 1s.

[0075] Please refer to Fig.11 As shown, Fig.11 The figure is a comparison diagram of the electrochemical performance of the battery cell after the weld mark 210 is processed by the weld mark 210 processing method in this embodiment and the battery cell without the processing, wherein the horizontal axis is the number of cycles and the vertical axis is the specific capacity, the unit is mAh / g. It can be seen from the figure that the electrochemical performance of the battery cell after the weld mark 210 is processed by the weld mark 210 processing method in this embodiment is basically the same as that of the battery cell without the processing, and the weld mark 210 processing method in this embodiment will not affect the performance of the battery cell.

[0076] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A welding and printing processing device, characterized in that: include: A pickling operation station and a wiping operation station, wherein the wiping operation station is arranged as a post-process of the pickling operation station; The pickling operation station is provided with a pickling component (1), the pickling component (1) comprising a titration head (13), the titration head (13) being used to titrate a pickling liquid onto a weld mark (210) on the adapter sheet (200), the pickling liquid being capable of removing welding slag and oxides on the weld mark (210); The wiping operation station is provided with a wiping assembly (2), wherein the wiping assembly (2) comprises a wiping piece (26), and the wiping piece (26) is used to wipe off the pickling liquid on the weld mark (210).

2. The welding and printing processing device according to claim 1, characterized in that: The pickling assembly (1) further comprises a reaction sleeve (14), wherein the reaction sleeve (14) forms a reaction space, wherein the reaction sleeve (14) is placed on the adapter sheet (200) and the weld mark (210) is located in the reaction space, and the titration head (13) titrates the pickling liquid into the reaction space.

3. The welding and printing processing device according to claim 2, characterized in that: The reaction sleeve (14) comprises an inner cylinder (141) and an outer cylinder (142), wherein the inner cylinder (141) and the outer cylinder (142) are arranged at an interval to form the reaction space, and the inner cylinder (141) and the outer cylinder (142) are connected via a plurality of connecting blocks (143), wherein the connecting blocks (143) extend along the length direction of the reaction sleeve (14), wherein the upper end surface of the connecting block (143) is lower than the upper end surfaces of the inner cylinder (141) and the outer cylinder (142), and the lower end surface of the connecting block (143) is higher than the lower end surfaces of the inner cylinder (141) and the outer cylinder (142).

4. The welding and printing processing device according to claim 3, characterized in that: The pickling assembly (1) further comprises a fixed shaft (11) and a rotating shaft (12); the fixed shaft (11) is coaxially arranged with the weld stamp (210); the fixed shaft (11) is used to drive the rotating shaft (12) to rotate; the rotating shaft (12) comprises an upper section (121), an extension section (122) and a lower section (123); the upper section (121) is coaxial with the fixed shaft (11) and is used to be connected to the fixed shaft (11); the extension section (122) extends radially of the upper section (121); the lower section (123) is fixedly connected to the extension section (122); the lower section (123) is parallel to the upper section (121) and is located above the reaction space; the titration head (13) is connected to the bottom of the lower section (123).

5. The welding and printing processing device according to claim 4, characterized in that: The outer diameter of the inner cylinder (141) is smaller than the inner diameter of the weld mark (210), and the inner diameter of the outer cylinder (142) is larger than the outer diameter of the weld mark (210).

6. The welding and stamping processing device according to claim 5, characterized in that: The gap value between the outer cylinder (142) and the inner cylinder (141) is 2 to 4 times the width value of the weld mark (210).

7. The welding and printing processing device according to claim 1, characterized in that: The cleaning component (2) further comprises: A cleaning spindle (21), the cleaning spindle (21) is a hollow structure, two connecting shafts (22) are fixedly connected to the two sides of the cleaning spindle (21), the ends of the two connecting shafts (22) are fixedly connected to fixing plates (23), the lower ends of the two fixing plates (23) are rotatably connected to clamping plates (25) through hinge shafts (24), and the two clamping plates (25) are used to clamp or release the cleaning member (26); A cylinder (27), wherein the cylinder (27) is disposed in the cleaning spindle (21), and an output shaft (271) of the cylinder (27) is hingedly connected to two pull rods (28), and the two pull rods (28) are respectively hingedly connected to the two clamping plates (25) to drive the clamping plates (25) to clamp or release the cleaning member (26).

8. The welding and printing processing device according to any one of claims 1 to 7, characterized in that: The invention also comprises a drying operation station, which is arranged as a post-process of the wiping operation station, and is provided with a drying component (3), which comprises a blowing member (31) and an air suction member (32), wherein the blowing member (31) is used for blowing air toward the surface of the weld mark (210), and the air suction member (32) is used for sucking gas from the surface of the weld mark (210).

9. A welding stamping method, characterized in that: A weld mark (210) is cleaned using the weld mark processing device according to any one of claims 1 to 8, wherein the weld mark processing method comprises: titrating a preset amount of pickling solution to the weld stamp (210) and waiting for a first preset time; Wipe off the pickling liquid on the weld mark (210).

10. The welding stamp processing method according to claim 9, characterized in that: The pickling solution is an inorganic weak acid, and the concentration is greater than or equal to 95%; Alternatively, the pickling solution is an organic weak acid.

11. The welding stamp processing method according to claim 9, characterized in that: The preset volume is 0.04 ml-0.2 ml, and the first preset time is less than or equal to 10 s.

12. The welding stamp processing method according to claim 11, characterized in that: The preset amount is 0.1 ml, and the first preset time is 2 s.

13. The welding stamp processing method according to claim 9, characterized in that: After wiping off the pickling liquid on the weld mark (210), the process further comprises: Blowing air at a preset air volume and a preset temperature toward the surface of the weld mark (210) for a second preset time, and sucking air from the surface of the weld mark (210) for a third preset time; The preset air volume is 20L / min-40L / min, the preset temperature is 55°C-65°C, the second preset time is 0.5s-2s, and the third preset time is 0.5s-2s.

14. The welding stamp processing method according to claim 13, characterized in that: The preset air volume is 30 L / min, the preset temperature is 60° C., the second preset time is 1 s, and the third preset time is 1 s.

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