Pole piece cleaning equipment and cleaning method thereof

Abstract

The invention provides pole piece cleaning equipment and a cleaning method thereof. The pole piece cleaning equipment comprises an unwinding mechanism, a first tension control mechanism, a fourth tension control mechanism and a winding mechanism which are sequentially arranged in the conveying direction of a pole piece. At least one liquid spraying mechanism, at least one blade coating mechanism and at least one drying mechanism are arranged between the first tension control mechanism and the fourth tension control mechanism, the blade coating mechanism is arranged between the liquid spraying mechanism and the drying mechanism, and the liquid spraying mechanism is arranged behind the first tension control mechanism and can move in the conveying direction of the pole piece. And the distance between the liquid spraying mechanism and the blade coating mechanism can be adjusted. According to the pole piece cleaning equipment and the cleaning method thereof, the wide pole piece can be cleaned, the continuous production requirement can be met, and the cleaning effect of the pole piece can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery production equipment, in particular to a pole piece cleaning equipment and a cleaning method thereof. BACKGROUND

[0002] In order to meet the fast charging performance of the battery, in the preparation process of some pole pieces, it is necessary to clean and groove on the pole piece to remove the slurry on the surface of the pole piece, so that the empty foil is exposed, and the empty foils of the multi-layer pole piece are connected when the pole piece is wound or laminated, so as to realize the function of fast charging of the battery.

[0003] In the prior art, the slurry is usually coated at the position where the tab needs to be welded, and then the coating is stripped (also known as cleaning the pole piece). The commonly used cleaning methods include laser cleaning, ultrasonic cleaning and scraper cleaning. The scraper cleaning is divided into dry cleaning and wet cleaning. In dry cleaning, the scraper directly peels off the dry coating, which requires a large force and is easy to damage the pole piece and produce dust. Although the existing wet cleaning can overcome some defects of dry cleaning, with the development of lightweight batteries and the continuous promotion of fast consumption market, the length of the single pole piece required in the battery is gradually shortened, and the existing pole piece cleaning equipment is prone to not cleaning the single pole piece with a short length, which may cause residue in the slot of the pole piece and affect the safety of the battery. SUMMARY

[0004] The present application aims to solve the above-mentioned defects, and provides a pole piece cleaning equipment and a cleaning method thereof, which can improve the cleaning effect of the pole piece and improve the safety of the battery.

[0005] To solve the above-mentioned problems, the first aspect of the present application provides a pole piece cleaning equipment, comprising: a unwinding mechanism, a first tension control mechanism, a fourth tension control mechanism and a winding mechanism arranged in sequence along the conveying direction of the pole piece.

[0006] At least one liquid spraying mechanism, at least one scraping mechanism and at least one drying mechanism are arranged between the first tension control mechanism and the fourth tension control mechanism, the scraping mechanism is arranged between the liquid spraying mechanism and the drying mechanism, and the liquid spraying mechanism is arranged after the first tension control mechanism. The liquid spraying mechanism can move along the conveying direction of the pole piece, and the distance between the liquid spraying mechanism and the scraping mechanism can be adjusted.

[0007] The second aspect of the present application provides a pole piece cleaning method, which uses the pole piece cleaning equipment as described in the first aspect to scrape and groove the pole piece, and the pole piece cleaning method comprises:

[0008] The pole piece is conveyed from the unwinding mechanism to the liquid spraying mechanism, and the liquid spraying mechanism sprays the infiltration liquid on the to-be-coated area of the pole piece;

[0009] The pole piece after being sprayed with the infiltration liquid is conveyed to the coating mechanism, and the coating mechanism coats the to-be-coated area of the pole piece;

[0010] The pole piece after being coated is conveyed to the drying mechanism, and the drying mechanism dries the coated area of the pole piece.

[0011] The pole piece cleaning device provided in the embodiment of the present application can clean the wide-width pole piece by respectively arranging the liquid spraying mechanism and the coating mechanism, can coat multiple slots on the wide-width pole piece by the coating mechanism, is beneficial to improve the cleaning efficiency of the pole piece, and the liquid spraying mechanism can move along the conveying direction of the pole piece and adjust the distance between the liquid spraying mechanism and the coating mechanism, so that the liquid spraying mechanism is closer to the coating mechanism, the position of spraying the infiltration liquid is more accurate, the buffer amount of the single pole piece between the liquid spraying mechanism and the coating mechanism can be reduced to avoid the volatilization of the infiltration liquid sprayed by the liquid spraying mechanism and affect the cleaning effect of the pole piece, and the pole piece cleaning device can also be compatible with the pole piece with a shorter length, so that the pole piece cleaning device can clean the pole piece with a shorter length to a longer length, and the application range of the pole piece cleaning device is expanded.

[0012] The pole piece cleaning method provided in the embodiment of the present application can clean the wide-width pole piece, can meet the continuous production demand of the wide-width pole piece, can improve the cleaning effect of the pole piece, can realize both improving the cleaning efficiency of the pole piece and ensuring the cleaning effect of the pole piece, and is beneficial to improve the production efficiency and production quality of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The pole piece cleaning device provided in the embodiment of the present application is a structure schematic view;

[0014] Figure 2 The liquid spraying mechanism provided in the embodiment of the present application is a structure schematic view;

[0015] Figure 3 The drying adjustment mechanism provided in the embodiment of the present application is a structure schematic view;

[0016] Figure 4 The defective product marking mechanism provided in the embodiment of the present application is a structure schematic view;

[0017] Figure 5 The structure schematic view of continuously cleaning the pole piece provided in the embodiment of the present application is a structure schematic view;

[0018] Figure 6 The structure schematic view of intermittently cleaning the pole piece provided in the embodiment of the present application is a structure schematic view. DETAILED DESCRIPTION

[0019] The technical solutions of the present application will be described clearly and exhaustively in combination with the drawings. In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In addition, in the description of the present application, "at least one" means one or more, and "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the description of the present application, the term "as an optional embodiment" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one optional embodiment or optional example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0021] In combination with Figure 1 The first aspect of the present embodiment provides a pole piece cleaning equipment, comprising: an unwinding mechanism 1, a first tension control mechanism 2, a fourth tension control mechanism 3 and a winding mechanism 4 arranged in sequence along the conveying direction of the pole piece 100, the unwinding mechanism 1, the first tension control mechanism 2, the fourth tension control mechanism 3 and the winding mechanism 4 are all arranged on a rack (not shown in the figure), wherein:

[0022] At least one liquid spraying mechanism 5, at least one scraping mechanism 6 and at least one drying mechanism 7 are arranged between the first tension control mechanism 2 and the fourth tension control mechanism 3, the scraping mechanism 6 is arranged between the liquid spraying mechanism 5 and the drying mechanism 7, and the liquid spraying mechanism 5 is arranged after the first tension control mechanism 2, that is, along the conveying direction of the pole piece 100 (i.e. the length direction of the pole piece, Figure 1 the arrow in the figure and Figure 2The first tension control mechanism 2, the at least one liquid spraying mechanism 5, the at least one scraping mechanism 6, the at least one drying mechanism 7 and the fourth tension control mechanism 3 are sequentially arranged along the x-axis direction in the machine direction of the single piece of the pole piece 100.

[0023] By respectively arranging the liquid spraying mechanism 5 and the scraping mechanism 6, the present embodiment can realize scraping of multiple slots on a wide pole piece, which is beneficial to improve the cleaning efficiency of the pole piece. Moreover, the liquid spraying mechanism 5 can move along the conveying direction of the pole piece 100 and the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 can be adjusted, so that the liquid spraying mechanism 5 can be closer to the scraping mechanism 6 and the position of spraying the soaking liquid can be more accurate. In the existing pole piece cleaning equipment, the liquid spraying mechanism is far away from the scraping mechanism, and the liquid spraying mechanism cannot move along the conveying direction of the pole piece 100. When the length of the single piece of the pole piece is shortened, the buffer amount of the single piece of the pole piece between the liquid spraying mechanism and the scraping mechanism is large. The soaking liquid generally has volatility. When the end pole piece reaches the scraping mechanism, the soaking liquid on the surface of the pole piece volatilizes, so that there is little or no soaking liquid on the surface of the to-be-scraped area, which leads to incomplete cleaning and affects the cleaning effect, so that the surface of the pole piece is prone to residual. Compared with the existing pole piece cleaning equipment, the pole piece cleaning equipment in the present embodiment can not only reduce the buffer amount of the single piece of the pole piece between the liquid spraying mechanism 5 and the scraping mechanism 6 to avoid volatilization of the soaking liquid sprayed by the liquid spraying mechanism 5 and affect the cleaning effect of the pole piece, but also can be compatible with shorter pole pieces, so that the pole piece cleaning equipment can clean pole pieces with different lengths, thereby expanding the application range of the pole piece cleaning equipment.

[0024] It can be understood that the length P of the single piece of the pole piece 100 refers to the length of the pole piece 100 after being cut into a single piece. In combination with FIGS. 1 and 2, Figure 5 and Figure 6 As shown in FIGS. 1 and 2, each single piece of the pole piece after being cut includes the paste-coated area 120 and the empty-foil area 110, and any two paste-coated areas 120 are separated by the empty-foil area 110. The length P of the single piece of the pole piece 100 refers to the sum of the length of one paste-coated area 120 and the length of one empty-foil area 110.

[0025] On the basis of the above embodiment, as an optional implementation, two liquid spraying mechanisms 5, two blade coating mechanisms 6 and two drying mechanisms 7 are arranged between the first tension control mechanism 2 and the fourth tension control mechanism 3, one liquid spraying mechanism 5 is arranged in front of each blade coating mechanism 6 to facilitate spraying before each blade coating, and one drying mechanism 7 is arranged behind each blade coating mechanism 6 to facilitate drying after each blade coating. One liquid spraying mechanism 5, one blade coating mechanism 6 and one drying mechanism 7 process one surface of the pole piece 100, and the other liquid spraying mechanism 5, the other blade coating mechanism 6 and the other drying mechanism 7 process the other surface of the pole piece 100. Specifically, as shown in Figure 1 The first liquid spraying mechanism 5 and the first blade coating mechanism 6 on the right side of the rack, the pole piece 100 is fed from right to left, the first surface of the pole piece 100 is processed, the upper and lower surfaces of the pole piece 1 are exchanged through other auxiliary mechanisms such as tension control and deviation correction mechanism, and the pole piece 100 reaches the second liquid spraying mechanism 5 and the second blade coating mechanism 6 on the left side of the rack, the pole piece 100 is fed from left to right, the second surface of the pole piece 100 is processed, and finally reaches the winding mechanism 4 through the fourth tension control mechanism 3, the first surface and the second surface of the pole piece 100 are two surfaces arranged opposite to each other. The following description of the liquid spraying mechanism 5 and the blade coating mechanism 6 is based on the second liquid spraying mechanism 5 and the second blade coating mechanism 6 on the left side of the rack. The first liquid spraying mechanism 5 and the first blade coating mechanism 6 on the left side of the rack have the same structure as the second liquid spraying mechanism 5 and the second blade coating mechanism 6, except that the installation direction is reversed. Of course, when only one surface of the pole piece 100 needs to be processed, only one liquid spraying mechanism 5, one blade coating mechanism 6 and one drying mechanism 7 can be arranged between the first tension control mechanism 2 and the fourth tension control mechanism 3.

[0026] On the basis of the above embodiment, as an optional implementation, in combination with Figure 2 As shown in the drawings, the liquid spraying mechanism 5 comprises a first moving module 51, a second moving module 52 and a liquid spraying module 53, the liquid spraying module 53 is arranged on the second moving module 52, and the second moving module 52 is used to drive the liquid spraying module 53 to move along the width direction of the pole piece 100 (i.e. Figure 2The second moving module 52 is arranged on the first moving module 51, the first moving module 51 drives the second moving module 52 to move along the conveying direction of the pole piece 100, so that the second moving module 52 drives the liquid spraying module 53 to move along the conveying direction of the pole piece 100. Thus, the liquid spraying module 53 can be moved along the conveying direction of the pole piece 100 by the first moving module 51, not only the liquid spraying module 53 can move along with the pole piece 100 during the conveying of the pole piece 100, but also the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 can be adjusted. The liquid spraying module 53 can be moved along the width direction of the pole piece 100 by the second moving module 52, so that the liquid spraying module 53 can reciprocate along the width direction of the pole piece 100 to spray the infiltrating liquid on the surface of the pole piece 100. The first moving module 51 and the second moving module 52 are independently arranged, so that the liquid spraying module 53 can move along the length direction of the pole piece 100 while moving along the width direction of the pole piece 100, which can make the position of the sprayed infiltrating liquid more accurate, and is beneficial to further improve the cleaning effect and avoid the spraying inclination during the spraying of the infiltrating liquid, so that the infiltrating liquid sprayed exceeds the area to be scraped, thereby affecting the cleaning effect.

[0027] Specifically, the liquid spraying module 53 is used for spraying the infiltrating liquid on the surface of the pole piece 100, and the liquid spraying module 53 comprises a liquid storage tank, a spray control valve and a nozzle. The spray control valve is connected with the liquid storage tank and the nozzle respectively, and is used for controlling the spraying dose of the nozzle. The liquid level detector can be arranged on the liquid storage tank, and the spraying dose of the nozzle can be prewarned by the liquid level detector, so as to accurately control the spraying dose of the nozzle, avoid the waste caused by too much spraying dose, and cause poor cleaning effect caused by too little spraying dose. The nozzle is used for spraying the infiltrating liquid on the surface of the pole piece 100, and the nozzle can be driven by the first moving module 51 and the second moving module 52 to continuously spray or intermittently spray on the surface of the pole piece 100 along the width direction of the pole piece 100. Figure 2As shown, a is continuous spraying on the surface of the pole piece 100, b is gap spraying on the surface of the pole piece 100, continuous spraying facilitates subsequent scraping of continuously arranged groove positions on the surface of the pole piece 100, and gap spraying facilitates subsequent scraping of interval arranged groove positions on the surface of the pole piece 100. The liquid spraying module 53 in the embodiment can accurately control the spraying dose of the nozzle through the spray control valve during continuous spraying or gap spraying, and can effectively avoid spraying in areas that do not need to be sprayed. It can be understood that during continuous spraying, the spray control valve is always in working condition, so that the infiltrating liquid is sprayed from the nozzle, during gap spraying, the spray control valve is in working condition when spraying is needed, so that the infiltrating liquid is sprayed from the nozzle, and when spraying is not needed, the spray control valve stops the nozzle from spraying the infiltrating liquid; and during gap spraying, the distance between any two adjacent spraying areas can be equal or not equal, and the specific distance range can be set according to process requirements. In the embodiment, the surface of the pole piece 100 can be continuously sprayed or gap sprayed according to the process requirements of the subsequent single pole piece.

[0028] In the embodiment, the first moving module 51 can include a first driving member and a first sliding member, the second moving module 52 is connected with the first sliding member, and the first driving member drives the first sliding member to move along the conveying direction of the pole piece 100 to drive the liquid spraying module 53 to move along the conveying direction of the pole piece 100. The second moving module 52 includes a second driving member and a second sliding member, the liquid spraying module 53 is connected with the second sliding member, and the second driving member drives the second sliding member to move along the conveying direction of the pole piece 100 to drive the liquid spraying module 53 to move along the width direction of the pole piece. The first driving member and the second driving member can be motors, the first sliding member and the second sliding member can be matched sliding blocks and sliding rails, and the first moving module 51 and the second moving module 52 can further include a chain or a synchronous belt transmission member to realize transmission connection.

[0029] On the basis of the above-mentioned embodiments, as an optional implementation manner, the doctoring mechanism 6 comprises a plurality of doctor blade modules arranged at intervals along the width direction of the pole piece 100, each doctor blade module is independently arranged, and the plurality of doctor blade modules can be synchronously doctored along the width direction of the pole piece 100 to form a plurality of groove positions arranged at intervals on the surface of the pole piece 100 or form a continuous groove position on the surface of the pole piece 100; if the plurality of groove positions arranged at intervals are formed on the surface of the pole piece 100, the interval between any two adjacent groove positions can be equal or unequal, and the specific interval range can be set according to the process requirement. Thus, by arranging a plurality of doctor blade modules at intervals along the width direction of the pole piece 100, the wide-width pole piece can be doctored, and a plurality of groove positions can be simultaneously doctored on the wide-width pole piece, and then the wide-width pole piece is cut into a plurality of single pole pieces with relatively narrow width. Compared with the narrow-width pole piece cleaning equipment, the pole piece cleaning equipment greatly improves the cleaning efficiency of the pole piece, for example, the pole piece cleaning equipment can simultaneously doctor 24 groove positions on the surface of the pole piece 100, which is equivalent to 48 single pole pieces with relatively narrow width, and the cleaning efficiency is improved by tens of times compared with the narrow-width pole piece cleaning equipment.

[0030] It can be understood that the wide-width pole piece refers to a pole piece with relatively large width, and the single pole piece with relatively narrow width refers to a pole piece with relatively small width. As an optional implementation manner, the width of the wide-width pole piece can be 500 mm to 650 mm, and the width of the single pole piece with relatively narrow width can be 30 mm to 150 mm. Of course, the width of the wide-width pole piece and the single pole piece can also be set by the person skilled in the art according to the actual situation. The person skilled in the art can determine the width of each groove position and the interval between any two adjacent groove positions according to the width of the wide-width pole piece and the single pole piece after cutting.

[0031] In the embodiment, the number of the doctor blade modules on the doctoring mechanism 6 can be determined by the width of the wide pole piece and the slot positions scraped by the doctoring mechanism 6. For example, if the surface of the pole piece 100 forms 24 spaced slot positions, 12 doctor blade modules can be arranged, each of which scrapes two slot positions on the surface of the pole piece 100. Each of the doctor blade modules scrapes one slot position on the surface of the pole piece 100 first, then each of the doctor blade modules moves a first preset distance along the width direction of the pole piece 100 (i.e. the distance between any two adjacent slot positions), and scrapes another slot position on the surface of the pole piece 100. A standard spacer can be arranged between any two adjacent doctor blade modules to ensure the distance between any two adjacent slot positions. If the surface of the pole piece 100 forms one continuous slot position, n (n is an integer greater than or equal to 1) doctor blade modules can be arranged, each of which scrapes a second preset distance on the surface of the pole piece 100 along the width direction of the pole piece 100. The slot positions scraped by two adjacent doctor blade modules are connected, and n slot positions are connected to form a continuous slot position, i.e. the width of the wide pole piece is equal to n second preset distances. Of course, the number of the doctor blade modules can also be determined according to the actual situation.

[0032] The scraping mechanism in the embodiment can adopt the conventional scraping mechanism on the existing pole piece manufacturing equipment, for example, the scraping mechanism 6 in the embodiment includes a rack, a pole piece positioning module, a moving module, a scraper module, a dust suction assembly, a dust blowing assembly, an interface module and a roller. The moving module includes a sliding rail and a sliding block, the sliding rail is fixedly installed on the rack, the sliding block is movably installed on the sliding rail, the scraper module is installed on the sliding block, the number of the sliding blocks can be 12, and the sliding blocks are arranged in parallel along the axis direction of the sliding rail, and the moving direction of the sliding block and the scraper module is perpendicular to the moving direction of the pole piece 100. The scraper module 40 is 12, and is installed on the sliding block and arranged in parallel along the axis direction of the sliding rail (the number of the sliding block and the scraper module corresponds, and can be increased or reduced according to actual process requirements). The scraper module includes a tool holder, a scraper lifting mechanism, a scraper and a pressure sensor, the scraper lifting mechanism is installed on the tool holder, the scraper is installed on the scraper lifting mechanism, and the pressure sensor is installed on the scraper. The scraper moves up and down under the control of the scraper lifting mechanism, and the pressure sensor sends a moving signal to the scraper lifting mechanism by sensing the pressure between the scraper and the pole piece. The dust suction assembly includes a support, a linear bearing and a dust suction pipe, the number of the dust suction pipes and the linear bearings is 12 (the number of the linear bearings and the dust suction pipes corresponds to the number of the scraper modules), the support is fixedly installed on the rack, the dust suction pipe is movably installed on the support through the linear bearing, one dust suction pipe is installed in each linear bearing, and the 12 dust suction pipes are independent of each other. One end of the dust suction pipe is installed on the scraper module and located vertically between the scraper and the pole piece, and moves with the scraper module. The dust suction pipe is provided with a scraper channel, and the scraper contacts the pole piece below the dust suction pipe through the scraper channel under the control of the scraper lifting mechanism. The dust blowing assembly includes a dust blowing pipe, which is installed on the scraper module and moves with the scraper module, and a dust blowing port of the dust blowing pipe is located on the side of the dust suction pipe and faces the scraper. The interface module includes an aviation plug and a pressure sensor wiring end, and is fixedly installed on the rack. The plurality of rollers are installed at the bottom of the rack. Of course, the scraping mechanism in the embodiment can also adopt other commonly used scraping mechanisms in the field, as long as it can ensure that a plurality of grooves are simultaneously formed on the surface of the pole piece 100.

[0033] On the basis of the above embodiment, as an optional implementation manner, the drying adjustment mechanism 8 is arranged between the scraping mechanism 6 and the drying mechanism 7, and the scraping mechanism 6 and the drying mechanism 7 are connected through the drying adjustment mechanism 8. Figure 3As shown, the drying adjustment mechanism 8 comprises an adjustment passing roller 81, which is used to adjust the length of the pole piece 100 between the scraping mechanism 6 and the drying mechanism 7, so that the scraping mechanism 6 can scrape the slot position of the pole piece 100 at the same time, and the drying mechanism 7 can dry the scraped slot position of the pole piece 100. Therefore, by arranging the drying adjustment mechanism 8 between the scraping mechanism 6 and the drying mechanism 7, the distance between the scraping mechanism 6 and the drying mechanism 7 can be ensured to be an integer multiple of the length of the single pole piece 100, so that the drying mechanism 7 can dry the pole piece 100 at the same time when the scraping mechanism 6 scrapes the slot position, and the two mechanisms work at the same time, which is beneficial to improve the cleaning efficiency of the pole piece 100.

[0034] Specifically, the drying adjustment mechanism 8 comprises the adjustment passing roller 81, a third driving member 82 and a lead screw, the adjustment passing roller 81 is connected with the lead screw, the third driving member 82 is connected with the lead screw, and the third driving member 82 drives the adjustment passing roller 81 to move through the lead screw, so that the pole piece 100 wound on the adjustment passing roller 81 moves, thereby adjusting the length of the pole piece 100 between the scraping mechanism 6 and the drying mechanism 7. The third driving member 82 can be a motor.

[0035] In the embodiment, the drying mechanism 7 is used to dry the scraped slot position, and the drying mechanism 7 can dry the pole piece 100 through the upper heating plate and the lower heating plate, the pole piece 100 is located between the two heating plates, the lower heating plate is connected with the lifting driving member, and the distance between the two heating plates can be adjusted through the lifting driving member. The drying mechanism 7 is also provided with an air inlet and an air outlet, the drying mechanism 7 can be preheated through the air inlet in advance, which is beneficial to speed up the drying speed, and the gas containing dust and moisture is discharged through the air outlet. The air outlet can be arranged as a negative pressure air outlet channel to enhance the dust removal effect and ensure the cleanliness of the surface of the pole piece 100.

[0036] The drying mechanism in the embodiment can adopt a conventional drying mechanism on an existing pole piece manufacturing device. For example, the drying mechanism in the embodiment includes a rack, a heating module, a gas preheating module, a lifting module and a dust removal module. The heating module includes an upper heating plate, a lower heating plate and a temperature sensor. The upper heating plate is fixedly installed on the rack and located above the rack. The lower heating plate is connected with the lifting module. The upper heating plate and the lower heating plate are provided with electric heating sheets. The temperature sensor is installed in the upper heating plate and the lower heating plate. The lower heating plate is internally provided with a gas pipe and is communicated to a gas outlet provided on one surface of the lower heating plate. The surface provided with the gas outlet faces the upper heating plate. The lifting module is a pneumatic lifting module. The fixed end of the lifting module is provided on the rack. The movable end of the lifting module is connected to the surface of the lower heating plate without the gas outlet. The lifting gas joint and the lowering gas joint of the lifting module are respectively connected with external devices through the gas pipe. The fixed end of the lifting module is fixedly installed on the inner bottom surface of the rack. The lower heating plate connected to the movable end of the lifting module is located directly below the upper heating plate. The gas outlet on the lower heating plate faces the upper heating plate. The lower heating plate moves in the vertical direction under the driving of the movable end. The gas preheating module is a gas preheating plate. The gas preheating plate is provided with a gas preheating pipe. The gas preheating pipe is arranged in an S shape on the gas preheating plate. The area of the gas preheating plate is fully utilized to increase the length of the gas preheating pipe on the gas preheating plate, prolong the moving distance and moving time of the gas on the gas preheating plate. The gas inlet end of the gas preheating pipe is connected with an external device. The gas outlet end is connected with the gas inlet of the lower heating plate through the gas pipe (the upper heating plate is also provided with the gas pipe and the gas blowing port. The gas outlet end is also connected with the gas inlet of the upper heating plate). The gas preheating plate is provided with a thermocouple for detecting the temperature of the gas output from the gas outlet end. When the temperature of the gas does not reach a preset temperature value, the output of the gas from the gas outlet end to the lower heating plate is paused. The dust removal module includes a plurality of dust removal pipes. The dust removal pipe is a square pipe with one end closed and the other end as a gas outlet. The gas outlet is connected with an external gas suction device. Of course, the drying mechanism 7 in the embodiment can also adopt other conventional drying mechanisms in the art, as long as it can ensure the drying of the slot of the pole piece 100.

[0037] On the basis of the above-mentioned embodiments, as an optional implementation, the first drying mechanism 7 and the second liquid spraying mechanism 5 are further sequentially provided with a belt joint mechanism 9, a traction mechanism 10, a second tension control mechanism 11a and a deviation rectification mechanism 12, so as to improve the cleaning accuracy of the second side surface of the pole piece 100. The belt joint mechanism 9 is used to joint the incoming pole piece and the original pole piece, the traction mechanism 10 is used to press and pull the pole piece 100 in the conveying process, the second tension control mechanism 11a is used to adjust the tension of the pole piece 100, so that the tension of the pole piece 100 in the conveying process is kept stable, and the pole piece 100 in the conveying process is stored, so as to improve the running speed of the pole piece 100, the deviation rectification mechanism 12 is used to rectify the pole piece 100 in the conveying process, so as to avoid the deviation of the pole piece 100 in the conveying process, ensure the correct position of the joint mechanism, and thus improve the cleaning accuracy of the pole piece 100. And in this embodiment, the second tension control mechanism 11a is arranged between the first drying mechanism 7 and the second liquid spraying mechanism 5, and the traction mechanism 10 is arranged before the second tension control mechanism 11a, and the tension of different sections is blocked by the traction mechanism, so that the adjustment range is large, and the tension of the pole piece 100 can be maintained in a small range. The belt joint mechanism 9, the traction mechanism 10, the second tension control mechanism 11a and the deviation rectification mechanism 12 in this embodiment all adopt the conventional belt joint mechanism, traction mechanism, tension control mechanism and deviation rectification mechanism on the existing pole piece manufacturing equipment, and the structure of the above components is not improved in this embodiment, which will not be described here.

[0038] On the basis of the above embodiment, as an optional implementation, a detection mechanism 13 and a defective product marking mechanism 14 are further arranged between the second drying mechanism 7 and the fourth tension control mechanism 3, the defective product marking mechanism 14 is arranged after the detection mechanism 13, the detection mechanism 13 is used to detect the scraping quality of the slot of the pole piece 100, and the area with poor slot scraping is fed back to the PLC, the PLC signal is output to the defective product marking mechanism 14, and the defective product marking mechanism 14 is used to mark the area with poor slot scraping on the pole piece 100. Therefore, through the detection mechanism 13 and the defective product marking mechanism 14, the area with poor slot scraping on the pole piece 100 can be marked, so as to facilitate the identification of the single pole piece in the subsequent process, and avoid the defective product flowing into the subsequent process. Specifically, the second drying mechanism 7 is further sequentially provided with a traction mechanism 10, a third tension control mechanism 11b, a tape connecting mechanism 9 and a deviation rectifying mechanism 12, and the detection mechanism 13 and the defective product marking mechanism 14 are arranged between the deviation rectifying mechanism 12 and the fourth tension control mechanism 3, the defective product marking mechanism 14 is arranged after the detection mechanism 13, and the detection precision of the pole piece 100 and the detection precision of the defective product can be improved through this arrangement. And in this embodiment, the third tension control mechanism 11b is arranged between the second drying mechanism 7 and the detection mechanism 13, and the traction mechanism 10 is arranged before the third tension control mechanism 11b, and the traction mechanism 10 blocks the tension of different sections, which not only has a large adjustment range, but also can maintain the tension of the pole piece 100 in a small range.

[0039] Specifically, the detection mechanism 13 can be a detection mechanism containing a CCD detection camera, the CCD detection camera can adopt a commonly used CCD detection camera in the art, and the full name of CCD is Charge-coupled Device, which means a signal transmission detection element by coupling. The pole piece 100 is detected by the CCD detection camera, the built-in program of the detection mechanism 13 can compare the slot of the pole piece 100 with the set size precision to determine whether the scraping quality of the slot of the pole piece 100 meets the requirements, and the area with poor slot scraping is fed back to the defective product marking mechanism 14 through the PLC. In this embodiment, if the side surface of the pole piece 100 is scraped to form a slot, the CCD detection camera can be a CCD detection camera for photographing and detecting only one side surface of the pole piece 100, and if the two side surfaces of the pole piece 100 are scraped to form a slot, the CCD detection camera can be a CCD detection camera for photographing and detecting both upper and lower side surfaces.

[0040] Specifically, in combination with Figure 4As shown, the defective product marking mechanism 14 includes a first marking member 141, a second marking member 142, a fourth driving member and a fifth driving member which are oppositely arranged along the width direction of the pole piece 100. The fourth driving member is connected with the first marking member 141, and the fifth driving member is connected with the second marking member 142. The fourth driving member and the fifth driving member are respectively used for driving the first marking member 141 and the second marking member 142 to move oppositely or away from each other along the width direction of the pole piece 100. The first marking member 141 and the second marking member 142 can simultaneously mark 140 the area with poor coating on the slot of the pole piece 100. More specifically, the starting positions of the first marking member 141 and the second marking member 142 are respectively arranged at both ends of the width direction of the pole piece 100. When the slot of the pole piece 100 has poor coating, the first marking member 141 and the second marking member 142 move oppositely along the width direction of the pole piece 100 to spray code, paste glue or laser mark the area with poor coating on the slot of the pole piece 100, so as to form a mark 140 for the subsequent identification of the narrow strip pole piece. If the surface of the pole piece 100 forms a plurality of slots arranged at intervals, according to the area with poor coating of the slot detected by the detection mechanism 13, the first marking member 141 and the second marking member 142 mark the corresponding area with poor coating of the slot. The number of marks is determined by the number of slots on the surface of the pole piece 100. In combination with Figure 5 If the surface of the pole piece 100 forms a continuous slot, according to the area with poor coating of the slot detected by the detection mechanism 13, the first marking member 141 and the second marking member 142 spray code, paste glue or laser mark a plurality of marks 140 on the continuous slot. The plurality of marks 140 are arranged at intervals along the width direction of the pole piece 100, and the number of marks 140 can be up to 64, so as to facilitate the subsequent identification of the single pole piece. After marking the previous pole piece 100, the first marking member 141 and the second marking member 142 move away from each other along the width direction of the pole piece 100, so as to reset the first marking member 141 and the second marking member 142 for code spraying on the next pole piece. By arranging two marking members which can move oppositely or away from each other, the efficiency of marking the defective pole piece 100 can be improved, thereby facilitating the production efficiency of the pole piece 100.

[0041] The first marking member 141 and the second marking member 142 in the embodiment have the same structure. The first marking member 141 and the second marking member 142 can be a code spraying gun, a glue pasting machine or a laser marking machine. Of course, the first marking member 141 and the second marking member 142 can also use other common defective product marking members in the art. The code spraying gun, the glue pasting machine or the laser marking machine in the embodiment all use the conventional code spraying gun, the glue pasting machine or the laser marking machine on the existing pole piece manufacturing equipment. The structure of the above components is not improved in the embodiment, and will not be described here.

[0042] Since the paste coating area 120 between any two adjacent pole pieces 100 is separated by the empty foil area 110, in the embodiment, when marking the area with poor scraping on the slot position of the pole piece 100, the marking can be sprayed or pasted or laser coded on the empty foil area 110, so as to facilitate the subsequent recycling of the pole piece 100 with poor scraping, and reduce the waste of the pole piece 100.

[0043] On the basis of the above-mentioned embodiments, as an optional implementation manner, an unqualified product marking adjustment mechanism 15 is arranged between the detection mechanism 13 and the unqualified product marking mechanism 14. The unqualified product marking adjustment mechanism 15 can adopt the same structure as the drying adjustment mechanism 8, that is, by arranging an adjustable over roller in the unqualified product marking adjustment mechanism 15, the length of the pole piece 100 between the detection mechanism 13 and the unqualified product marking mechanism 14 is adjusted, so that the detection mechanism 13 detects the scraping quality of the slot position of the pole piece 100, and at the same time, the unqualified product marking mechanism 14 can code or paste or laser code the detected pole piece 100. Therefore, by means of the unqualified product marking adjustment mechanism 15, the distance between the detection mechanism 13 and the unqualified product marking mechanism 14 can be ensured to be an integer multiple of the length of a single pole piece 100, so that the detection mechanism 13 and the unqualified product marking mechanism 14 work at the same time, which is beneficial to improve the cleaning efficiency of the pole piece 100.

[0044] In the embodiment, the unwinding mechanism 1 is used to control the rotation of the pole piece roll to realize unwinding, and ensure the supply of the pole piece 100 of the subsequent scraping mechanism 6. The first tension control mechanism 2 is used to control the tension of the unwinding of the pole piece 100. The first tension control mechanism 2 and the unwinding mechanism 1 cooperate to ensure the smooth conveying of the pole piece 100 after unwinding, which is beneficial to improve the cleaning effect of the pole piece 100. After the pole piece 100 is output from the first tension control mechanism 2, before being conveyed to the first liquid spraying mechanism 5, a dust removal mechanism is further included. The dust removal mechanism is used to remove dust from both sides of the pole piece 100, so as to ensure that the pole piece 100 is dust-free before scraping, which is beneficial to improve the quality of the pole piece 100. The fourth tension control mechanism 3 is used to control the tension of the winding of the pole piece 100, and the winding mechanism 4 is used to collect the cleaned pole piece 100 into a roll. The unwinding mechanism 1 and the winding mechanism 4 in the embodiment both have a self-correcting function, which can correct the pole piece 100 to ensure the accuracy of the position of the pole piece 100 during cleaning, and is beneficial to further improve the cleaning effect of the pole piece 100. In the embodiment, the specific structures of the unwinding mechanism 1, the first tension control mechanism 2, the fourth tension control mechanism 3 and the winding mechanism 4 are not limited, and those skilled in the art can select the above-mentioned mechanisms commonly used in the art according to the actual situation.

[0045] The second aspect of the embodiment provides a pole piece cleaning method, which adopts the pole piece cleaning device shown in the first aspect to scrape and groove the pole piece. The pole piece cleaning method comprises:

[0046] The pole piece 100 is conveyed from the unwinding mechanism 1 to the liquid spraying mechanism 5, and the liquid spraying mechanism 5 sprays the infiltration liquid on the to-be-coated area of the pole piece 100;

[0047] The pole piece 100 after being sprayed with the infiltration liquid is conveyed to the coating mechanism 6, and the coating mechanism 6 coats the to-be-coated area of the pole piece 100;

[0048] The pole piece 100 after being coated is conveyed to the drying mechanism 7, and the drying mechanism 7 dries the coated area of the pole piece 100.

[0049] The pole piece cleaning method of the embodiment can clean the wide-width pole piece, can meet the continuous production demand of the wide-width pole piece, and can improve the cleaning effect of the pole piece, so that the cleaning efficiency of the pole piece is improved and the cleaning effect of the pole piece is ensured, which is beneficial to improving the production efficiency and production quality of the battery.

[0050] Specifically, the unwinding mechanism 1 intermittently outputs the pole piece 100, the pole piece 100 is conveyed to the first liquid spraying mechanism 5 after passing through the unwinding mechanism 1 and the first tension control mechanism 2, the first liquid spraying mechanism 5 sprays the infiltration liquid on the to-be-coated area of the first surface of the pole piece 100, the pole piece 100 after being sprayed with the infiltration liquid is conveyed to the first coating mechanism 6, the first coating mechanism 6 coats the to-be-coated area of the first surface of the pole piece 100, the pole piece 100 after being coated is conveyed to the first drying mechanism 7, the first drying mechanism 7 dries the coated area of the first surface of the pole piece 100, the pole piece 100 after being dried is sequentially conveyed through the tape connecting mechanism 9, the traction mechanism 10, the second tension control mechanism 11a and the deviation rectifying mechanism 12, the upper and lower surfaces of the pole piece 100 are exchanged, and the pole piece 100 is conveyed to the second liquid spraying mechanism 5, the second liquid spraying mechanism 5 sprays the infiltration liquid on the to-be-coated area of the second surface of the pole piece 100, the pole piece 100 after being sprayed with the infiltration liquid is conveyed to the second coating mechanism 6, the second coating mechanism 6 coats the to-be-coated area of the second surface of the pole piece 100, the pole piece 100 after being coated is conveyed to the second drying mechanism 7, the second drying mechanism 7 dries the coated area of the second surface of the pole piece 100, the pole piece 100 after being dried is sequentially conveyed through the traction mechanism 10, the third tension control mechanism 11b, the tape connecting mechanism 9 and the deviation rectifying mechanism 12, the pole piece 100 is conveyed to the detection mechanism 13, the detection mechanism 13 detects the coating quality of the slot position of the pole piece 100, and feeds back the area with poor coating of the slot position to the PLC, the PLC signal is output to the defective product marking mechanism 14, the pole piece 100 after passing through the defective product marking adjustment mechanism 15 is conveyed to the defective product marking mechanism 14, the defective product marking mechanism 14 marks the area with poor coating of the slot position on the pole piece 100, and the pole piece 100 after being marked is wound by the winding mechanism 4 after passing through the fourth tension control mechanism 3.

[0051] In the embodiment, the unwinding mechanism 1 intermittently outputs the pole piece 100. In the process of conveying the pole piece 100 from the unwinding mechanism 1 to the winding mechanism 4, the pole piece 100 is intermittently conveyed, that is, the pole piece 100 is conveyed according to a certain period or a certain length, and conveying and pausing are alternately performed in the conveying process. In the embodiment, the pole piece 100 is intermittently conveyed, so that the liquid spraying mechanism 5, the scraping mechanism 6 and the defective product marking mechanism 14 are in a relatively static state with the pole piece 100 in the working process, which is beneficial to further improve the cleaning effect. The interval period or the conveying length of the intermittent conveying in the embodiment is not further limited, and a person skilled in the art can set it according to the actual situation.

[0052] On the basis of the above embodiment, as an optional implementation manner, the first liquid spraying mechanism 5 and the second liquid spraying mechanism 5 both determine the liquid spraying mode of spraying the immersion liquid on the to-be-scraped area of the pole piece 100 according to the length of the single pole piece 100. Specifically:

[0053] If the length of the single pole piece 100 is less than or equal to the stroke of the liquid spraying mechanism 5, the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 is adjusted, so that the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 is N times the length of the single pole piece 100. The liquid spraying mechanism 5 sprays the immersion liquid on the to-be-scraped area of the pole piece 100 at the preset position. N is an integer greater than or equal to 1.

[0054] If the length of the single pole piece 100 is greater than the stroke of the liquid spraying mechanism 5, the liquid spraying mechanism 5 moves with the pole piece 100 to spray the immersion liquid on the to-be-scraped area of the pole piece 100 during the conveying of the pole piece 100.

[0055] Wherein, the stroke of the liquid spraying mechanism 5 is along the conveying direction of the pole piece 100, and the maximum distance between the liquid spraying mechanism 5 and the scraping mechanism 6 is the distance L in Figure 1 The stroke of the liquid spraying mechanism 5 is the distance L, and the length of the single pole piece 100 is the length of the single pole piece after the pole piece 100 is cut.

[0056] Exemplarily, in combination with Figure 1As shown, the liquid spraying mechanism 5 can move from the S1 point to the S2 point. When the liquid spraying mechanism 5 is at the S1 point, the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 is L1. The distance between the liquid spraying mechanism 5 and the S2 point is L2. The stroke of the liquid spraying mechanism 5 is L2+L1=L. The length of the pole piece is P. If P is less than or equal to L, the liquid spraying mechanism 5 is moved between the S1 and S2 points, and the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 is N×P. At this time, the position of the liquid spraying mechanism 5 is the preset position. The liquid spraying mechanism 5 is fixed at the preset position to spray the infiltration liquid on the to-be-scraped area of the pole piece 100. When the liquid spraying mechanism 5 sprays the infiltration liquid on the to-be-scraped area of the pole piece 100 in the width direction of the pole piece 100, the pole piece 100 is in a state of stopping moving. If P is greater than L, when the pole piece 100 is conveyed between the S1 point and the S2 point, the liquid spraying mechanism 5 moves with the pole piece 100. That is, during the movement of the pole piece 100, the liquid spraying mechanism 5 moves synchronously with the pole piece 100 in the conveying direction of the pole piece 100. After the liquid spraying mechanism 5 and the pole piece 100 keep relatively static, the liquid spraying mechanism 5 starts to spray the infiltration liquid in the direction perpendicular to the conveying direction of the pole piece 100 (i.e., the width direction of the pole piece 100) to spray the infiltration liquid on the to-be-scraped area of the pole piece 100.

[0057] In the embodiment, when the length of the single pole piece 100 is less than or equal to the stroke of the liquid spraying mechanism 5, the first moving assembly 51 drives the liquid spraying module 53 to move in the conveying direction of the pole piece 100, so that the distance between the liquid spraying mechanism 5 and the scraping mechanism 6 is N times the length of the single pole piece 100. The liquid spraying mechanism 5 is fixed at the preset position to spray the infiltration liquid on the to-be-scraped area of the pole piece 100. Then, the pole piece 100 is conveyed intermittently to the scraping mechanism 6. The to-be-scraped area of the pole piece 100 reaches the scraping mechanism 6. The scraping mechanism 6 scrapes the to-be-scraped area. When the liquid spraying mechanism 5 sprays the infiltration liquid on the to-be-scraped area of the pole piece 100, the scraping mechanism 6 can simultaneously scrape the pole piece 100 after being cleaned by spraying. The liquid spraying mechanism 5 and the scraping mechanism 6 can work simultaneously, and the cleaning efficiency of the pole piece 100 is improved. When the length of the single pole piece 100 is greater than the stroke of the liquid spraying mechanism 5, the liquid spraying mechanism 5 can move in the conveying direction of the pole piece 100 and move with the pole piece 100 to spray the infiltration liquid on the to-be-scraped area of the pole piece 100.

[0058] In the embodiment, the spraying mode of the infiltration liquid on the to-be-scrapped area of the pole piece 100 is determined according to the length of the pole piece 100. On the one hand, the spraying mechanism 5 can accurately spray the infiltration liquid on the to-be-scrapped area of the pole piece 100, avoiding the infiltration liquid from tilting beyond the to-be-scrapped area and affecting the subsequent cleaning effect. On the other hand, the distance between the spraying mechanism 5 and the scraping mechanism 6 can be within a relatively appropriate range, the number of pole pieces stored between the spraying mechanism 5 and the scraping mechanism 6 can be reduced, the infiltration liquid on the surface of the pole piece 100 can be prevented from volatilizing when reaching the scraping mechanism 6, the residual infiltration liquid on the to-be-scrapped area is less or no, and the cleaning effect is improved. In the embodiment, the spraying mode of the infiltration liquid on the to-be-scrapped area of the pole piece 100 is determined according to the length of the pole piece 100. The embodiment can be compatible with more pole pieces 100 with different lengths, reduce the storage amount of the pole pieces, improve the cleaning effect of the pole piece 100, improve the cleaning precision, and thus improve the quality of the battery.

[0059] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications shall fall within the protection scope of the present disclosure.

Claims

1. An electrode cleaning device, characterized in that, include: The unwinding mechanism, the first tension control mechanism, the fourth tension control mechanism, and the winding mechanism are arranged sequentially along the conveying direction of the electrode sheet. At least one spraying mechanism, at least one scraping mechanism, and at least one drying mechanism are provided between the first tension control mechanism and the fourth tension control mechanism. The scraping mechanism is located between the spraying mechanism and the drying mechanism, and the spraying mechanism is located after the first tension control mechanism. The spraying mechanism can move along the conveying direction of the electrode sheet, and the distance between the spraying mechanism and the scraping mechanism can be adjusted.

2. The electrode cleaning equipment according to claim 1, characterized in that, The spraying mechanism includes a first moving module, a second moving module, and a spraying module. The spraying module is used to spray the wetting liquid onto the surface of the electrode. The spraying module is disposed on the second moving module. The second moving module is used to drive the spraying module to move along the width direction of the electrode. The second moving module is disposed on the first moving module. The first moving module drives the spraying module to move along the conveying direction of the electrode through the second moving module. The width direction of the electrode is perpendicular to the conveying direction of the electrode.

3. The electrode cleaning equipment according to claim 2, characterized in that, The spray module includes a liquid storage tank, a spray control valve, and a nozzle connected to each other. The spray control valve is used to control the spraying dosage of the nozzle. The nozzle can continuously spray or intermittently spray the surface of the electrode in the width direction of the electrode.

4. The electrode cleaning equipment according to claim 1, characterized in that, The coating mechanism includes multiple scraper modules spaced apart along the width direction of the electrode sheet. Each scraper module is independently configured, and the multiple scraper modules can simultaneously perform coating along the width direction of the electrode sheet, so that the surface of the electrode sheet forms multiple spaced grooves, or forms a continuous groove on the surface of the electrode sheet. If the surface of the electrode has multiple spaced slots, the spacing between any two adjacent slots may be equal or unequal.

5. The electrode cleaning equipment according to claim 1, characterized in that, A drying adjustment mechanism is provided between the coating mechanism and the drying mechanism. The drying adjustment mechanism includes an adjustment roller, which is used to adjust the length of the electrode sheet between the coating mechanism and the drying mechanism, so that while the coating mechanism is coating the grooves of the electrode sheet, the drying mechanism can dry the coated grooves of the electrode sheet.

6. The electrode cleaning equipment according to claim 1, characterized in that, A detection mechanism and a defective product marking mechanism are also provided between the drying mechanism and the fourth tension control mechanism. The defective product marking mechanism is located after the detection mechanism. The detection mechanism is used to detect the coating quality of the grooves on the electrode sheet, and the defective product marking mechanism is used to mark the areas with poor coating on the grooves of the electrode sheet.

7. The electrode cleaning equipment according to claim 6, characterized in that, The defect marking mechanism includes a first marking element and a second marking element arranged opposite to each other along the width direction of the electrode sheet. The first marking element and the second marking element can move relative to each other or move away from each other along the width direction of the electrode sheet, and the first marking element and the second marking element can simultaneously mark the area of ​​poor coating on the groove of the electrode sheet. The first marking device is an inkjet printer or an adhesive applicator, and / or the second marking device is an inkjet printer or an adhesive applicator, and / or the second marking device is a laser marking machine.

8. A method for cleaning electrode sheets, characterized in that, The electrode cleaning equipment as described in any one of claims 1 to 7 is used to scrape and groove the electrode, and the electrode cleaning method includes: The electrode sheet is conveyed from the unwinding mechanism to the spraying mechanism, and the spraying mechanism sprays a wetting liquid onto the area of ​​the electrode sheet to be coated. The electrode sheet after being sprayed with wetting liquid is conveyed to the scraping mechanism, which scrapes the area of ​​the electrode sheet to be scraped. The coated electrode is then conveyed to a drying mechanism, which dries the coated area of ​​the electrode.

9. The electrode cleaning method according to claim 8, characterized in that, The spraying mechanism sprays a wetting liquid onto the area of ​​the electrode to be coated, including: If the length of a single electrode sheet is less than or equal to the stroke of the spraying mechanism, then the distance between the spraying mechanism and the scraping mechanism is adjusted so that the distance between the spraying mechanism and the scraping mechanism is N times the length of the single electrode sheet, and the spraying mechanism sprays the wetting liquid onto the area to be scraped on the electrode sheet at a preset position, where N is an integer greater than or equal to 1. If the length of the single electrode sheet is greater than the stroke of the spraying mechanism, then during the electrode sheet transport, the spraying mechanism moves with the electrode sheet to spray the wetting liquid onto the area of ​​the electrode sheet to be coated. Wherein, the stroke of the spraying mechanism is along the conveying direction of the electrode sheet, the maximum distance between the spraying mechanism and the coating mechanism is, and the length of the single electrode sheet is the length of the single electrode sheet after the electrode sheet is cut.

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