Battery module weld seam automatic cleaning device and cleaning method thereof

Abstract

The application discloses a kind of battery module weld joint automatic cleaning device and its cleaning method, including bottom frame, intermediate portion actuator and upper protective device, the base plate of the intermediate portion actuator is fixed in the upper portion of the bottom frame, the upper protective device is fixed in the upper surface of the base plate, the base plate is centrally arranged with feeding and positioning mechanism, and upper and lower weld cleaning mechanism is symmetrically arranged on left and right outer side, and electrical port protection mechanism is symmetrically arranged on left and right inner side, and side weld cleaning mechanism is symmetrically arranged in front and back;The cleaning device can clean the weld joint of the both ends of battery module synchronously, and the cleaning work of four welds on upper and lower surfaces and four welds on front and back surfaces is completed in two steps, completely meet the beat requirement of whole production line.Weld cleaning process, upper protective device is closed, and the whole cleaning device forms a closed cavity, and dust collecting device is used to suck out and collect the flying welding slag into dust collecting box, and the whole cleaning process is very friendly to external environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic cleaning of welds, in particular to a battery module weld automatic cleaning device and a cleaning method thereof. BACKGROUND

[0002] The shell of the automobile battery module is composed of a U-shell, an upper cover, a left end plate and a right end plate. During the production and manufacturing process of the automobile battery module, the U-shell, the upper cover and the left and right end plates need to be welded into a closed shell after the battery pack is put into the shell. Therefore, eight welds are generated on the front, back, top and bottom surfaces of the automobile battery module, which are symmetrically arranged at the two ends of the automobile battery module. In order to not affect the later use of the automobile battery module, after the welding is completed, a cleaning device needs to be used to clean the welding slag at the welds.

[0003] With the development of the automobile industry and the automation industry, the production and manufacturing of automobile parts are currently mostly carried out in the form of fully automatic production lines, and the production and manufacturing of automobile battery modules are no exception. Weld cleaning is an important part of the fully automatic production line of automobile battery modules, and the cleaning quality and efficiency have an important influence on subsequent production. Therefore, it is a basic requirement for the automatic weld cleaning device to clean without omission and meet the production rhythm. At the same time, the collection of welding slag and the protection of the electrical port of the automobile battery module also need to be considered to avoid secondary pollution to the environment and the automobile battery module during the cleaning process. In addition, a reasonable feeding and discharging device needs to be set to avoid unnecessary interference and achieve full automatic connection with the front and rear stations.

[0004] CN115041883A discloses a battery pack side plate weld cleaning device and a cleaning method thereof, which comprises a bottom plate, the top of the bottom plate is symmetrically fixed with a first U-shaped frame, the top of the two first U-shaped frames is fixedly connected with a track, the top of the track is slidably connected with four sliding seats that can move on the track, the top of the sliding seat is symmetrically fixedly connected with a limiting block, a battery assembly is placed between the two limiting blocks, and a clamping stabilizing mechanism is arranged on the inner wall of the track. During the movement of the battery assembly placed on the sliding seat to the cleaning station, the clamping stabilizing mechanism adjusts the position of the battery assembly on the sliding seat and clamps and limits it, which is beneficial to the accurate adaptation of the four L-shaped shells to the weld positions on the side plates of the battery assembly and improves the cleaning effect. Since the four side plates are bonded to the side of the battery pack and welded between each other by welding technology, only four vertical welds are cleaned, but the cleaning structure is relatively complex, the control difficulty is high, and the completion degree is difficult to guarantee. In addition, although the L-shaped shell in the cleaning device plays a certain blocking role, there is still a situation that part of the welding slag and dust flying during cleaning overflow to the external environment. Therefore, we propose a battery module weld automatic cleaning device and a cleaning method thereof. SUMMARY

[0005] To solve the above technical problems, the present application provides a battery module weld seam automatic cleaning device and its cleaning method, which is used for cleaning the weld seam of the shell in the full-automatic production line of the battery module. The present application adopts the following technical scheme: a battery module weld seam automatic cleaning device, comprising a bottom frame, an intermediate part execution mechanism and an upper protection device, characterized in that: the base plate of the intermediate part execution mechanism is fixed on the upper part of the bottom frame, the upper protection device is fixed on the upper surface of the base plate, the base plate is centrally arranged with feeding and positioning mechanism, the left and right outer sides are symmetrically arranged with up and down weld seam cleaning mechanism, the left and right inner sides are symmetrically arranged with electrical port protection mechanism, and the front and back are symmetrically arranged with side weld seam cleaning mechanism; the up and down weld seam cleaning mechanism comprises a welding support fixed on the base plate, a servo module fixed on the welding support, an L-shaped support moving with the servo module slider, the upper surface of the L-shaped support is fixed with slide table cylinder I and slide table cylinder II, the slide table cylinder I is fixed with a few character-shaped supports I, the two ends of the character-shaped support I are symmetrically installed with cleaning wheel brushes, the cleaning wheel brushes are driven to rotate by motor I, the outer side of the cleaning wheel brush is arranged with dust collector cover I, and the front end of the slide table cylinder II is fixed with a U-shaped block; the side weld seam cleaning mechanism comprises a linear guide rail I and a cylinder II fixed on the base plate, a slide block of the linear guide rail I is installed with a bottom plate I, the bottom plate I is floatingly connected with the rod end of the cylinder II, the left and right ends of the bottom plate I are symmetrically arranged with supports, the supports are installed with cleaning roller brushes, the outer side of the cleaning roller brush is arranged with dust collector cover II, and the cleaning roller brush is driven to rotate by motor II; the upper protection device comprises a shell, a movable door and a cylinder I, when working, the movable door is closed under the drive of the cylinder I, and the shell and the base plate form a closed space.

[0006] Further, the feeding and positioning mechanism comprises a bottom plate II and a module placing plate, the module placing plate is fixed on the bottom plate II through a support column, the two sides of the module placing plate are respectively arranged with a fixed positioning plate and a movable positioning plate, the fixed positioning plate is installed on the bottom plate II, a cylinder III is installed thereon, the rod end of the cylinder III is floatingly connected with the movable positioning plate, can drive the movable positioning plate to slide along the linear guide rail II, and the linear guide rail II is fixed on the bottom plate II.

[0007] Further, the lower surface of the bottom plate II is floatingly connected with the rod end of the cylinder IV fixed on the base plate, the lower surface of the bottom plate II is connected with four guide shafts, and the guide shafts respectively pass through four linear bearings fixed on the base plate.

[0008] Further, the electrical port protection mechanism comprises a H-shaped bracket II fixed on the base plate, the upper surface of the H-shaped bracket II is provided with a linear guide rail III and a positioning stopper, the slider of the linear guide rail III is connected with a sliding table cylinder III, the front end of the sliding table cylinder III is provided with a protective cover, the protective cover is provided with a notch matched with the protrusion on the positioning stopper, so that the protective cover cannot be displaced during work.

[0009] Further, the dust collecting cover I and the dust collecting cover II are communicated with a pipeline system, and the pipeline system is connected with an external dust collecting device.

[0010] A cleaning method of a battery module welding seam automatic cleaning device, characterized by comprising the following steps:

[0011] Step one: the robot places the battery module transferred from the previous station on the module placing plate; the cylinder III drives the moving positioning plate to clamp the battery module; the cylinder IV drives the feeding and positioning mechanism to move to the working position;

[0012] Step two: the cylinder I drives the moving door to close; the sliding table cylinder III sends the protective cover to the end face of the battery module and covers the electrical port;

[0013] Step three: the sliding table cylinder I pushes the cleaning wheel brush to the upper and lower surfaces of the battery module, the motor I drives the cleaning wheel brush to rotate and clean, the servo module drives the cleaning wheel brush to move until the cleaning work of the upper and lower welding seams is completed; the sliding table cylinder I drives the cleaning wheel brush to move away from the battery module, the servo module retreats to the initial position; the cylinder II pushes the cleaning roller brush to the front and rear surfaces of the battery module, the motor II drives the cleaning roller brush to rotate and clean until the cleaning work is completed; the cylinder II drives the cleaning roller brush to move away from the battery module;

[0014] Step four: the sliding table cylinder III drives the protective cover to move away from the battery module; the moving door is opened; the cylinder IV lifts the feeding and positioning mechanism to the set position; the cylinder III drives the moving positioning plate to loosen the battery module; the robot moves the battery module to the next station; the above steps are repeated.

[0015] Compared with the prior art, the beneficial technical effects of the present application are:

[0016] The cleaning device comprises an upper and lower feeding and positioning mechanism, an upper and lower welding seam cleaning mechanism, a side edge welding seam cleaning mechanism, a dust collecting device and an upper protection device. The cleaning device can synchronously clean the welding seams at both ends of the battery module, and can complete the cleaning work of four welding seams on the upper and lower surfaces and four welding seams on the front and rear surfaces in two steps, thereby completely meeting the beat requirements of the whole production line. During the welding seam cleaning process, the upper protection device is closed, the whole cleaning device forms a closed cavity, the dust collecting device sucks out the flying welding slag and collects it into a dust collecting box, and the whole cleaning process is very friendly to the external environment. The upper and lower feeding and positioning mechanism can extend out of the upper protection device, so that the battery module can flow into and out of the next process, and the whole process is smooth and has no interference and blocking. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the battery module welding seam automatic cleaning device of the present application;

[0018] Figure 2 FIG. 5 is a schematic diagram of the structure of the actuator of the present application;

[0019] Figure 3 FIG. 7 is a schematic diagram of the structure of the upper and lower welding seam cleaning mechanism of the present application;

[0020] Figure 4 FIG. 9 is a schematic diagram of the structure of the side edge welding seam cleaning mechanism of the present application;

[0021] Figure 5 FIG. 11 is a schematic diagram of the structure of the upper and lower feeding and positioning mechanism of the present application;

[0022] Figure 6 FIG. 13 is a schematic diagram of the structure of the electrical port protection mechanism of the present application.

[0023] In the figure: 10, the bottom frame; 20, the middle part of the executive mechanism; 21, the base plate; 26, the pipeline system; 30, the upper protective device; 31, the shell; 32, the moving door; 33, the cylinder I; 220, the upper and lower welding seam cleaning mechanism; 221, the welding support; 222, the servo module; 223, the L-shaped support; 224, the sliding table cylinder I; 225, the several-shaped support I; 226, the cleaning wheel brush; 227, the dust cover I; 228, the sliding table cylinder II; 229, the U-shaped block; 2210, the motor I; 230, the side welding seam cleaning mechanism; 231, the linear guide rail I; 232, the bottom plate I; 233, the support; 234, the cleaning roller brush; 235, the dust cover II; 236, the motor II; 237, the cylinder II; 240, the feeding and positioning mechanism; 241, the bottom plate II; 242, the module placement plate; 243, the fixed positioning plate; 244, the moving positioning plate; 245, the cylinder III; 246, the linear guide rail II; 247, the cylinder IV; 248, the guide shaft; 249, the linear bearing; 250, the electrical port protection mechanism; 251, the several-shaped support II; 252, the linear guide rail III; 253, the sliding table cylinder III; 254, the protective cover; 255, the positioning block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0025] The implementation of the battery module welding seam automatic cleaning device is as follows:

[0026] Please refer to Figures 1-6 The device mainly consists of the bottom frame 10, the middle part of the executive mechanism 20 and the upper protective device 30. The base plate 21 of the middle part of the executive mechanism 20 is fixed on the upper part of the bottom frame 10, and the upper protective device 30 is fixed on the upper surface of the base plate 21. When working, the moving door 32 of the upper protective device 30 is closed under the driving of the cylinder I 33, and the shell 31 and the base plate 21 form a closed space, so that the welding slag and dust flying during cleaning will not overflow to the external environment.

[0027] The substrate 21 is arranged as a carrier of the entire execution mechanism, and the feeding and positioning mechanism 240 is arranged centrally. The upper and lower weld cleaning mechanisms 220 are symmetrically arranged on the left and right outer sides. The electrical port protection mechanism 250 is symmetrically arranged on the left and right inner sides. The side weld cleaning mechanism 230 is symmetrically arranged on the front and rear sides. During operation, the upper and lower weld cleaning mechanisms 220 on the left and right sides are synchronously operated to complete the cleaning of four welds on the upper and lower surfaces at one time. Then, the side weld cleaning mechanism 230 on the front and rear sides is synchronously operated to complete the cleaning of four welds on the front and rear surfaces at one time. The upper and lower weld cleaning mechanisms 220 and the side weld cleaning mechanism 230 are each provided with a dust collecting cover, which is communicated with the pipeline system 26. The end of the pipeline system 26 is connected to an external dust collecting device. During operation, the external dust collecting device sucks the flying welding slag and dust out through the pipeline system 26 and collects them into a dust collecting box.

[0028] The upper and lower weld cleaning mechanism 220 includes a welding support 221 fixed on the substrate 21, a servo module 222 fixed on the welding support 221, an L-shaped support 223 moving with the servo module 222, and a slide table cylinder I 224 and a slide table cylinder II 228 fixed on the upper surface of the L-shaped support 223. A few-shaped support I 225 is fixed on the slide table cylinder I 224. Symmetrical cleaning wheel brushes 226 are installed at the two ends of the few-shaped support I 225. The cleaning wheel brushes 226 are driven to rotate by a motor I 2210. A dust collecting cover I 2227 is arranged on the outer side of the cleaning wheel brushes 226 for collecting welding slag and dust. During operation, the slide table cylinder I 224 is extended, the bristles of the two cleaning wheel brushes 226 respectively contact the welds on the upper and lower surfaces of the battery module, and the cleaning wheel brushes 226 start to rotate and clean under the driving of the motor I 2210. With the movement of the servo module 222, the cleaning of the four welds on the upper and lower surfaces is gradually completed. After the cleaning work is completed, the motor I 2210 stops rotating, and the slide table cylinder I 224 is retracted to drive the cleaning wheel brushes 226 away from the battery module. A U-shaped block 229 is fixed at the front end of the slide table cylinder II 228.

[0029] The side weld cleaning mechanism 230 includes a linear guide rail I 231 and a cylinder II 237 fixed on the substrate. A bottom plate I 232 is installed on the slider of the linear guide rail I 231, and the bottom plate I 232 is floatingly connected with the rod end of the cylinder II 237. Symmetrical supports 233 are arranged at the left and right ends of the bottom plate I 232, and cleaning roller brushes 234 are installed on the supports 233. A dust collecting cover II 235 is arranged on the outer side of the cleaning roller brushes 234, and the cleaning roller brushes 234 are driven to rotate by a motor II 236. During operation, the cylinder II 237 drives the bottom plate I 232 to move, the bristles of the two cleaning roller brushes 234 respectively contact the longitudinal welds at the front and rear ends, and the cleaning roller brushes 234 start to rotate and clean under the driving of the motor II 236. After the cleaning work is completed, the motor II 236 stops rotating, and the cylinder II 237 drives the cleaning roller brushes 234 away from the battery module.

[0030] The positioning part of the feeding and discharging and positioning mechanism 240 includes a bottom plate II 241, and a module placement plate 242 is fixed on the bottom plate II 241 through a support. Fixed positioning plates 243 and movable positioning plates 244 are arranged on the two sides of the module placement plate 242 respectively. The fixed positioning plates 243 are installed on the bottom plate II 241, and a gas cylinder III 245 is installed on the fixed positioning plates 243. The rod end of the gas cylinder III 245 is floatingly connected with the movable positioning plates 244, and can drive the movable positioning plates 244 to slide along a linear guide rail II 246. The linear guide rail II 246 is fixed on the bottom plate II 241. After feeding, the gas cylinder III 245 is retracted, drives the movable positioning plates 244 to move to the side of the fixed positioning plates 243, pushes the battery module against the fixed positioning plates 243 and clamps the battery module. When discharging, the gas cylinder III 245 is extended, and drives the movable positioning plates 244 to move away from the battery module. The lower surface of the bottom plate II 241 is floatingly connected with the rod end of a gas cylinder IV 247 fixed on the base plate 21. The lower surface of the bottom plate II 241 is connected with four guide shafts 248, and the guide shafts 248 pass through four linear bearings 249 fixed on the base plate 21 respectively. When feeding and discharging, the gas cylinder IV 247 is extended, drives the positioning part on the bottom plate II 241 to extend upward to the upper protection device 30, so that the battery module flows from the previous process to the next process.

[0031] The electrical port protection mechanism 250 includes a Chinese character-shaped support II 251 fixed on the base plate 21, and a linear guide rail III 252 and a positioning block 255 are installed on the upper surface of the Chinese character-shaped support II 251. A sliding table gas cylinder III 253 is connected to the sliding block of the linear guide rail III 252, and a protection cover 254 is installed at the front end of the sliding table gas cylinder III 253. After feeding, the gas cylinder IV 247 drives the entire positioning mechanism to descend to the working position, the sliding table gas cylinder III 253 is extended, and the protection cover 254 moves to the end face of the battery module and covers the electrical port. The protection cover 254 is provided with a notch, which cooperates with the protrusion on the positioning block 255 to ensure that the protection cover 254 does not move during work. After the cleaning work is completed, the sliding table gas cylinder III 253 is retracted, and the protection cover 254 is separated from the battery module.

[0032] When the product is changed, the position of the protection cover 254 needs to be moved. At this time, the sliding block of the servo module 222 moves to the position where the protection cover 254 is located according to the setting, the sliding table gas cylinder II 228 is extended to make the U-shaped block 229 clamped on both sides of the sliding table gas cylinder III 253. The sliding block of the servo module 222 is moved again, drives the protection cover 254 to move along the linear guide rail III 252 to a new set position, and the sliding table gas cylinder II 228 is retracted to make the U-shaped block 229 separated from the sliding table gas cylinder III 253.

[0033] The cleaning method of the battery module weld seam automatic cleaning device specifically includes the following steps:

[0034] Step one (loading): the robot places the battery module transferred from the previous station on the module placement plate 242; cylinder III 245 drives the moving positioning plate 244 to clamp the battery module; cylinder IV 247 drives the entire positioning mechanism to move to the working position.

[0035] Step two (protection): cylinder I 33 drives the moving door 32 to close; slide table cylinder III 253 sends the protective cover 254 to the end face of the battery module and covers the electrical port.

[0036] Step three (cleaning): slide table cylinder I 224 pushes the cleaning brush 226 to the upper and lower surfaces of the battery module, motor I 2210 drives the cleaning brush 226 to rotate and clean, servo module 222 drives the cleaning brush 226 to move until the cleaning work of the upper and lower welds is completed; slide table cylinder I 224 drives the cleaning brush 226 away from the battery module, and servo module 222 retreats to the initial position; cylinder II 237 pushes the cleaning roller brush 234 to the front and rear surfaces, motor II 236 drives the cleaning roller brush 234 to rotate and clean until the end; cylinder II 237 drives the cleaning roller brush 234 away from the battery module.

[0037] Step four (unloading): slide table cylinder III 253 drives the protective cover 254 to separate from the battery module; the moving door 32 is opened; cylinder IV 247 lifts the entire positioning mechanism to the set position; cylinder III 245 drives the moving positioning plate 244 to release the battery module; the robot moves the battery module to the next station.

[0038] Repeat the above steps.

[0039] The battery module weld automatic cleaning device provided by the application is used for cleaning the welds of the shell in the full-automatic production line of the battery module, and the cleaning work of the four welds on the upper and lower surfaces and the four welds on the front and rear surfaces is completed in two steps, the production rhythm is stable, and the working efficiency is high. During work, the actuator of the device is in a closed cavity, the welding slag and dust are collected by the external dust collection device through the pipeline system, and the external environment is not polluted. The device is provided with an electrical port protection device, the electrical port of the battery module can be effectively protected, and electrical failure is not caused by the cleaning process.

[0040] Although the embodiments of the application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A battery module weld seam automatic cleaning device, comprising a bottom chassis (10), a middle portion actuator (20) and an upper guard (30), characterized in that: The base plate (21) of the intermediate part executive mechanism (20) is fixed on the upper part of the bottom rack (10), the upper part protection device (30) is fixed on the upper surface of the base plate (21), the upper and lower feeding and positioning mechanism (240) is arranged centrally on the base plate (21), the upper and lower weld cleaning mechanism (220) is symmetrically arranged on the left and right outer sides, the electrical port protection mechanism (250) is symmetrically arranged on the left and right inner sides, and the side weld cleaning mechanism (230) is symmetrically arranged on the front and rear sides; the upper and lower weld cleaning mechanism (220) comprises a welding support (221) fixed on the base plate (21), a servo module (222) fixed on the welding support (221), an L-shaped support (223) moving with the servo module (222) slider, a sliding table cylinder I (224) and a sliding table cylinder II (228) fixed on the upper surface of the L-shaped support (223), a few character-shaped support I (225) fixed on the sliding table cylinder I (224), cleaning wheel brushes (226) symmetrically installed at the two ends of the few character-shaped support I (225), the cleaning wheel brushes (226) are driven to rotate by a motor I (2210), a dust collecting cover I (227) is arranged on the outer side of the cleaning wheel brushes (226), and a U-shaped block (229) is fixed at the front end of the sliding table cylinder II (228); the side weld cleaning mechanism (230) comprises a linear guide rail I (231) and a cylinder II (237) fixed on the base plate (21), a bottom plate I (232) is installed on the slider of the linear guide rail I (231), the bottom plate I (232) is floatingly connected with the rod end of the cylinder II (237), supports (233) are symmetrically arranged at the left and right ends of the bottom plate I (232), cleaning roller brushes (234) are installed on the supports (233), a dust collecting cover II (235) is arranged on the outer side of the cleaning roller brushes (234), and the cleaning roller brushes (234) are driven to rotate by a motor II (236); the upper part protection device (30) comprises a shell (31), a movable door (32) and a cylinder I (33), and in working, the movable door (32) is closed under the drive of the cylinder I (33), and the shell (31) and the base plate (21) form a closed space.

2. The battery module weld seam automatic cleaning device of claim 1, wherein: The upper and lower feeding and positioning mechanism (240) comprises a bottom plate II (241) and a module placement plate (242), the module placement plate (242) is fixed on the bottom plate II (241) through a support, fixed positioning plates (243) and movable positioning plates (244) are arranged on the two sides of the module placement plate (242) respectively, the fixed positioning plate (243) is installed on the bottom plate II (241), a cylinder III (245) is installed on the fixed positioning plate (243), the rod end of the cylinder III (245) is floatingly connected with the movable positioning plate (244), the movable positioning plate (244) can be driven to slide along a linear guide rail II (246), and the linear guide rail II (246) is fixed on the bottom plate II (241).

3. The battery module weld seam automatic cleaning device of claim 2, wherein: The lower surface of the bottom plate II (241) is connected with the rod end of a cylinder IV (247) fixed on the base plate (21), and four guide shafts (248) are connected with the lower surface of the bottom plate II (241), and the guide shafts (248) pass through four linear bearings (249) fixed on the base plate (21) respectively.

4. The battery module weld seam automatic cleaning device of claim 3, wherein: The electrical port protection mechanism (250) comprises a Chinese character-shaped support II (251) fixed on the base plate (21), the upper surface of the Chinese character-shaped support II (251) is provided with a linear guide rail III (252) and a positioning stopper (255), the slider of the linear guide rail III (252) is connected with a sliding table cylinder III (253), the front end of the sliding table cylinder III (253) is provided with a protection cover (254), the protection cover (254) is provided with a notch, and the notch is matched with a protrusion on the positioning stopper (255), so that the protection cover (254) cannot be displaced during work.

5. The battery module weld seam automatic cleaning device of claim 4, wherein: The dust collecting cover I (227) and the dust collecting cover II (235) are communicated with a pipeline system (26) respectively, and the tail end of the pipeline system (26) is connected with an external dust collecting device.

6. A method of cleaning a battery module weld seam automatic cleaning device according to claim 5, characterized by, The method comprises the following steps: Step one: the robot places the battery module transferred from the previous station on the module placing plate (242); the cylinder III (245) drives the moving positioning plate (244) to clamp the battery module; the cylinder IV (247) drives the feeding and positioning mechanism (240) to move to the working position; Step two: the cylinder I (33) drives the moving door (32) to close; the sliding table cylinder III (253) sends the protection cover (254) to the end face of the battery module and covers the electrical port; Step three: the sliding table cylinder I (224) pushes the cleaning wheel brush (226) to the upper and lower surfaces of the battery module, the motor I (2210) drives the cleaning wheel brush (226) to rotate and clean, the servo module (222) drives the cleaning wheel brush (226) to move until the cleaning work of the upper and lower welding seams is completed; the sliding table cylinder I (224) drives the cleaning wheel brush (226) to move away from the battery module, and the servo module (222) retreats to the initial position; the cylinder II (237) pushes the cleaning roller brush (234) to the front and rear surfaces of the battery module, the motor II (236) drives the cleaning roller brush (234) to rotate and clean until the cleaning work is completed; the cylinder II (237) drives the cleaning roller brush (234) to move away from the battery module; Step four: the sliding table cylinder III (253) drives the protection cover (254) to move away from the battery module; the moving door (32) is opened; the cylinder IV (247) lifts the feeding and positioning mechanism (240) to the set position; the cylinder III (245) drives the moving positioning plate (244) to release the battery module; the robot moves the battery module to the next station; the above steps are repeated.

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