Pole piece cleaning device and pole piece manufacturing equipment

Abstract

The utility model provides a pole piece cleaning device and pole piece manufacturing equipment, the pole piece cleaning device comprises a cleaning module, the cleaning module comprises a first mounting seat and a cleaning piece, the first mounting seat comprises first plate bodies and second plate bodies, the first plate bodies are arranged in pairs along the thickness direction of a pole piece, and the second plate bodies are arranged in pairs along the thickness direction of the pole piece; the second plate body is connected to one end of each first plate body and forms a first channel with the first plate body in an enclosing manner, the first channel is matched with the pole lug and extends along the conveying direction of the pole piece, and the cleaning part is arranged on at least one first plate body and is used for cleaning the pole lug. According to the pole piece cleaning device, online cleaning of the pole lug can be achieved, residual metal filings on the pole lug can be effectively removed, the cleaning area on the pole piece can be controlled, the risk that water enters the pole piece body is reduced, and the cleaning reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and particularly relates to a pole piece cleaning device and a pole piece manufacturing equipment. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] During the preparation of the pole piece, after coating the active material layer on some areas of the pole piece substrate, it is necessary to cut the areas where the active material layer is not coated to form pole ears. However, a large amount of metal chips will be generated on the pole ears after cutting the pole piece strip, and these metal chips will affect the self-discharge and safety of the battery. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a pole piece cleaning device and a pole piece manufacturing equipment, which can realize the online cleaning of the pole ears, and can control the cleaning area on the pole piece, reduce the risk of moisture entering the pole piece body, and improve the reliability of cleaning.

[0005] In a first aspect, the present application provides a pole piece cleaning device for a pole piece. The pole piece includes a pole piece body and a pole ear provided on at least one side of the pole piece body. The pole piece cleaning device includes a cleaning module. The cleaning module includes a first mounting seat and a cleaning member provided on the first mounting seat. The first mounting seat includes a first plate body and a second plate body. The first plate bodies are arranged in pairs along the thickness direction of the pole piece. The second plate body is connected to one end of each first plate body and encloses a first channel with the first plate body. The first channel is adapted to the pole ear and extends along the conveying direction of the pole piece. The cleaning member is provided on at least one first plate body and is used for cleaning the pole ear.

[0006] In the embodiments of the present application, the pole piece cleaning device forms a first channel adapted to the pole ear, and by arranging the cleaning member in the first channel, the cleaning area can be limited within the first channel, so as to only perform online cleaning on the surface of the pole ear, reduce the risk of moisture entering the pole piece body, and improve the reliability of cleaning.

[0007] In some embodiments, the cleaning member includes a liquid injection pipeline and a spray opening formed on the surface of the first plate body facing the first channel. The liquid injection pipeline is used for injecting cleaning liquid, and the cleaning liquid is sprayed onto the surface of the pole ear through the spray opening. That is, the cleaning member can adopt a spraying method to spray the cleaning liquid onto the surface of the pole ear to wash away the residual metal chips on the surface of the pole ear, with stronger controllability and lower cost at the same time.

[0008] In some embodiments, along the liquid outlet direction of the spray orifice, the axis of the spray orifice is inclined towards the second plate body. By adopting the inclined liquid outlet method to spray the tab, the flow direction of the cleaning liquid can be better controlled, so that the cleaning liquid sprayed onto the tab surface can flow out along the direction away from the main body of the electrode sheet, further reducing the risk of moisture entering the main body of the electrode sheet.

[0009] In some embodiments, the electrode sheet cleaning device further includes a recovery pipeline, which is arranged in the first channel and on the side close to the second plate body, so as to realize the recovery of the cleaning liquid after the cleaning liquid washes away the particles on the tab surface.

[0010] In some embodiments, the electrode sheet cleaning device further includes a blocking member arranged on the mounting seat, and at least part of the blocking member is located at the edge of the first plate body and is used to block the cleaning liquid in the first channel.

[0011] In the embodiments of the present application, by arranging a blocking member on the edge of the first plate body, the cleaning liquid can be blocked in the first channel by the blocking member, reducing the possibility of the cleaning liquid splashing out of the first channel, further reducing the risk of moisture entering the main body of the electrode sheet, and improving the reliability of cleaning.

[0012] In some embodiments, the blocking member includes a first air inlet pipeline and an air knife communicated with the first air inlet pipeline. The air knife is distributed along the edge of the first plate body to form an air wall, which can effectively prevent the cleaning liquid from diffusing out of the channel, thereby restricting the cleaning liquid in the first channel. At the same time, the structure is simple and reliable, and the efficiency is higher.

[0013] In some embodiments, the cleaning member further includes a brushing part, which is arranged on the first plate body while avoiding the spray orifice and extends a preset distance into the first channel from the first plate body, so that while spraying the cleaning liquid onto the tab surface, the tab surface can be brushed by the brushing part, more reliably removing the metal chips on the tab surface and improving the cleaning effect.

[0014] In some embodiments, the distance between the pair of first plate bodies in the thickness direction of the electrode sheet is adjustable, so as to adjust the overlapping amount of the brushing part and the tab, to adapt to various specifications of electrode sheets. At the same time, after the electrode sheet cleaning device has been used for a period of time, the overlapping amount of the brush and the tab can be readjusted to improve the brushing effect of the brush on the tab.

[0015] In some embodiments, the cleaning module further includes a drying member, which is arranged in the first channel and is located downstream of the cleaning member along the conveying direction of the electrode sheet. The drying member is used to dry the tab, so that after the tab is cleaned by the cleaning member, the drying member can be used to dry the cleaning liquid on the tab surface, reducing the residual amount of the cleaning liquid attached to the tab, and further improving the cleaning quality of the tab.

[0016] In some embodiments, the pole piece cleaning device further includes a drying module. The drying module is disposed downstream of the cleaning module along the conveying direction of the pole piece and is combined with the cleaning module to form a cleaning module group. The drying module includes a second mounting seat and a drying member. The second mounting seat has a second channel, which is adapted to the pole ear and extends along the conveying direction of the pole piece. The drying member is disposed in the second channel and is used for drying the pole ear.

[0017] In the embodiments of the present application, the cleaning member and the drying member can be respectively disposed on the first mounting seat and the second mounting seat to respectively form a cleaning module and a drying module, which can not only realize the cleaning and drying of the pole ear, but also facilitate the installation and position adjustment of the cleaning module and the drying module, and improve the controllability.

[0018] In some embodiments, the number of the cleaning module groups is two or more, and the two or more cleaning module groups are spaced along the conveying direction of the pole piece; and / or, the two or more cleaning module groups are oppositely disposed on both sides of the pole piece and are adapted to the pole ears on both sides of the pole piece to improve the cleaning efficiency.

[0019] In some embodiments, the second mounting seat includes a third plate body and a fourth plate body. The third plate bodies are arranged in pairs along the thickness direction of the pole piece, and the fourth plate body is connected to one end of each third plate body and encloses with the third plate body to form the second channel. That is, by setting the second mounting seat and the first mounting seat to have the same structure, the installation and manufacturing difficulty can be simplified, and the cost can be reduced.

[0020] In some embodiments, the drying member includes a second air inlet pipeline and a nozzle communicated with the second air inlet pipeline. The nozzle is disposed on the surface of the third plate body facing the second channel and is configured to blow air into the second channel. By adopting the blowing method, the cleaning liquid remaining on the surface of the pole ear can be dried to realize the drying of the pole ear and improve the cleaning quality of the pole ear.

[0021] In some embodiments, along the blowing direction of the nozzle, the nozzle is inclined toward one side of the fourth plate body, so that the cleaning liquid on the surface of the pole ear can be blown toward the edge of the pole ear through the nozzle to realize the rapid drying of the pole ear.

[0022] In a second aspect, the embodiments of the present application provide a pole piece manufacturing device, including a pole piece conveying mechanism, a cutting mechanism, and a pole piece cleaning device. The pole piece conveying mechanism is used for conveying a pole piece strip. The cutting mechanism is disposed on one side of the pole piece conveying mechanism and is configured to cut the pole piece strip into a plurality of pole pieces with pole ears. The pole piece cleaning device is the pole piece cleaning device in the first aspect, and the pole piece cleaning device is adapted to the pole ear and is used for cleaning the pole ear.

[0023] The pole piece cleaning device in the embodiment of the present application includes a first mounting base and a cleaning member disposed on the first mounting base. The first mounting base is enclosed by a first plate body and a second plate body to form a first channel extending along the conveying direction of the pole piece. The first channel is adapted to the pole ear. By disposing the cleaning member on at least one first plate body and facing the first channel, during the process of conveying the pole piece, the surface of the pole ear can be cleaned online by the cleaning member to remove the metal chips remaining on the pole ear after the pole piece is cut. At the same time, the cleaning area is controlled at the pole ear, reducing the risk of moisture entering the pole piece body and improving the reliability of cleaning.

[0024] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically exemplified below. Brief Description of the Drawings

[0025] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0026] Figure 1 is the front view of the pole piece cleaning device provided by some embodiments of the present application;

[0027] Figure 2 is the top view of the pole piece cleaning device provided by some embodiments of the present application;

[0028] Figure 3 is the cross-sectional view of the cleaning module provided by some embodiments of the present application;

[0029] Figure 4 is the view inside the first channel in the cleaning module provided by some embodiments of the present application;

[0030] Figure 5 is the cross-sectional view of the drying module provided by some embodiments of the present application.

[0031] The reference numerals in the specific embodiments are as follows:

[0032] 100 Pole piece cleaning device, 200 Pole piece, 210 Pole ear, 220 Pole piece body;

[0033] 10 Cleaning module, 20 Drying module, 30 Bracket;

[0034] 1 First mounting seat, 11 First plate body, 12 Second plate body, 2 Cleaning part, 21 Liquid injection pipeline, 22 Spraying port, 23 Brushing part, 3 Recovery pipeline, 4 Blocking part, 4a First blocking part, 4b Second blocking part, 41 First air inlet pipeline, 42 Air knife, 5 Second mounting seat, 51 Third plate body, 52 Fourth plate body, 6 Drying part, 61 Second air inlet pipeline, 62 Air nozzle;

[0035] X Second direction, Y Third direction, Z First direction. Detailed implementation manners

[0036] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0037] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be the ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

[0038] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

[0039] In addition, the technical terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "mount", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0041] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0042] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely applied to electric transportation means such as electric bicycles, electric motorcycles, electric vehicles, as well as multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0043] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. In the process of preparing the electrode sheet, it is necessary to first cover the active material layer on the coating area of the electrode sheet substrate, and make the blank area that does not need to be coated be located in the middle position between two adjacent coating areas, so that after coating, the blank area can be slit to form an electrode tab on one side of the electrode sheet body.

[0044] Among them, a large amount of metal chips will be generated on the electrode tab after the electrode sheet is slit, and these metal chips will affect the self-discharge and safety of the battery. Therefore, it is necessary to clean the electrode tab after cutting to reduce the residue of metal chips. However, in the electrode sheet cleaning device in the related art, while cleaning the electrode tab, it will wet the electrode sheet body covered with the active material layer, thus affecting the service life of the battery.

[0045] Based on the above considerations, the present application provides an electrode sheet cleaning device and an electrode sheet manufacturing device, which can control the cleaning area and only clean the electrode tab to reduce the influence on the electrode sheet body, and improve the service life of the prepared electrode sheet while reducing the residue of metal chips. The following will be described in conjunction with the attached Figures 1 to 5 The electrode sheet cleaning device provided by the embodiments of the present application and the electrode sheet manufacturing device using the electrode sheet cleaning device will be described.

[0046] The embodiments of the present application provide an electrode sheet manufacturing device, including an electrode sheet conveying mechanism, a cutting mechanism, and an electrode sheet cleaning device 100.

[0047] The electrode strip conveying mechanism is used to supply and release a continuous electrode strip. The electrode strip includes an electrode substrate and an active material layer coated on at least one surface of the electrode substrate. In the embodiments of the present application, the electrode strip can be a positive electrode strip or a negative electrode strip.

[0048] When the electrode strip is set as the positive electrode strip, the electrode substrate is a positive current collector. The positive current collector can be a metal foil or a composite current collector. For example, as a metal foil, stainless steel, copper, aluminum, nickel, aluminum surface-treated with silver, stainless steel surface-treated with silver, carbon electrode, carbon, nickel, or titanium can be used. The active material layer is a positive electrode active material layer. As an example, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material includes at least one of, but is not limited to, lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds.

[0049] When the electrode strip is set as the negative electrode strip, the electrode substrate is a negative current collector. The negative current collector can be a metal foil, foam metal, foam carbon, or a composite current collector. The active material layer is a negative electrode active material layer. As an example, the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material includes at least one of, but is not limited to, artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate.

[0050] The electrode strip conveying mechanism may include a plurality of rollers and a driving part. The electrode strip is supported on the rollers, and the driving part is used to drive the rollers to rotate. The driving part includes, but is not limited to, a motor, a rotary cylinder, a rotary oil cylinder, etc., so as to guide the electrode strip to be sequentially conveyed to the cutting mechanism and the electrode cleaning device 100 through the rollers.

[0051] The cutting mechanism is arranged on one side of the electrode strip conveying mechanism and is configured to cut the blank area on the electrode strip that is not covered by the active material layer, so as to cut the continuous electrode strip into a plurality of electrodes 200 of a predetermined size. Each electrode 200 includes an electrode body 220 and an electrode tab 210 located on one side of the electrode body 220. Optionally, the cutting mechanism can be set as at least one of a cold pressing and slitting integrated machine and a single slitting machine.

[0052] The electrode cleaning device 100 is located downstream of the cutting mechanism and is arranged on the electrode tab side of each electrode 200. The electrode cleaning device 100 is used to perform on-line cleaning on the electrode tab 210 to remove the residual metal chips on the electrode tab 210, so as to improve the performance and service life of the battery. Optionally, the electrode cleaning device 100 can be arranged on the back plate of the cutting mechanism and / or the roller bracket 30 of the electrode strip conveying mechanism to facilitate the installation of the electrode cleaning device 100.

[0053] In some optional embodiments, the electrode manufacturing equipment further includes a dust removal mechanism. Along the electrode conveying direction, the electrode cleaning device 100 is located between the cutting mechanism and the dust removal mechanism.

[0054] The dust removal mechanism is used to absorb the dust attached to the main body 220 of the pole piece. The dust removal device may include a fan that generates negative pressure, such as a centrifugal fan or an axial flow fan. The fan has a suction port to absorb the metal dust attached to the main body 220 of the pole piece due to cutting, further reducing the risk of self-discharge or even short circuit of the battery cell.

[0055] Please refer to Figures 1 to 3 , Figures 1 to 3 which shows a schematic diagram of the pole piece cleaning device 100 in some embodiments of the present application.

[0056] An embodiment of the present application provides a pole piece cleaning device 100 for use in a pole piece manufacturing apparatus. The pole piece cleaning device 100 includes a first mounting base 1 and a cleaning member 2. The first mounting base 1 includes a first plate body 11 and a second plate body 12. The first plate bodies 11 are arranged in pairs in the thickness direction of the pole piece 200. The second plate body 12 is connected to one end of each first plate body 11 and encloses a first channel with the first plate body 11. The first channel is adapted to the pole ear 210 and extends along the conveying direction of the pole piece 200. The cleaning member 2 is located on at least one first plate body 11 and faces the first channel for cleaning the pole ear.

[0057] In the pole piece cleaning device 100 according to the embodiment of the present application, the first mounting base 1 and the cleaning member 2 are included. The first mounting base 1 forms a U-shaped structure with a first channel by enclosing with the first plate body 11 and the second plate body 12. The first channel is adapted to the pole ear 210 and extends along the conveying direction of the pole piece 200. Thus, during the process of conveying the pole piece 200, the pole ear 210 of the pole piece 200 can extend into the first channel, and the surface of the pole ear 210 is cleaned online by the cleaning member 2 to remove the metal chips remaining on the pole ear 210 after pole piece cutting. At the same time, the cleaning area is controlled within the first channel, reducing the risk of moisture entering the main body 220 of the pole piece and improving the reliability of cleaning.

[0058] It can be understood that the first channel is adapted to the pole ear 210 of the pole piece 200. Specifically, it means that the positive projection of the first channel on the pole piece 200 along the first direction Z covers the pole ear 210 and is misaligned with the main body 220 of the pole piece. By only extending the pole ear 210 of the pole piece 200 into the first channel while the main body 220 of the pole piece is located outside the first channel, the cleaning area of the pole piece cleaning device 100 can be better restricted, improving the cleaning effect.

[0059] It should be noted that the pole piece cleaning device in the embodiment of the present application can be applied to a pole piece manufacturing apparatus to achieve the cleaning of the pole ear 210. The pole piece cleaning device can also be applied to other mechanisms that need to be cleaned as long as the first channel is adapted to the cleaning area on the part to be cleaned.

[0060] Wherein, for the convenience of description, the thickness direction of the electrode tab 200 is defined as the first direction Z, and the conveying direction of the electrode tab is defined as the second direction X.

[0061] It can be understood that the cleaning member 2 is located on at least one first plate body 11. For example, the cleaning member 2 can be simultaneously arranged on the opposite first plate bodies 11. When the workpiece to be cleaned 2 extends into the first channel, the two side surfaces of the electrode lug 210 along the first direction Z can be simultaneously cleaned online through the cleaning member 2, improving the cleaning efficiency and reducing the metal chips remaining on the two side surfaces of the electrode lug 210, further reducing the self-discharge and even short-circuit risks of the battery cell.

[0062] In some optional embodiments, the cleaning member 2 includes a liquid injection pipeline 21 and a spray port 22 opened on the surface of the first plate body 11 facing the first channel. The liquid injection pipeline 21 is used to inject cleaning liquid and spray the cleaning liquid onto the surface of the workpiece to be cleaned 2 through the spray port 22.

[0063] Among them, the cleaning member 2 can spray the cleaning liquid onto the surface of the electrode lug 210 in a spraying manner to wash the metal chips remaining on the surface of the electrode lug 210. By adopting the spraying cleaning method, the metal chips and metal dust on the surface of the electrode lug 210 can be efficiently removed, with stronger controllability and lower cost at the same time.

[0064] It can be understood that in some other embodiments, the cleaning member 2 can also adopt other cleaning methods. For example, a rolling brush can be wetted and the rolling brush can be used for cleaning. However, for the convenience of description, the spraying cleaning method will still be used as an example for illustration below.

[0065] Optionally, the cleaning member 2 can further include a booster pump to pressurize the cleaning liquid through the booster pump, so as to spray the pressurized cleaning liquid onto the surface of the electrode lug 210 to improve the cleaning effect. Of course, in some other embodiments, high-pressure cleaning liquid can also be directly injected into the liquid injection pipeline 21 as long as the washing requirements of the metal chips on the surface of the electrode lug 210 can be met. Optionally, the cleaning liquid can be set as deionized water.

[0066] In some embodiments, spray ports 22 are arranged on the surfaces of the opposite first plate bodies 11 facing the first channel, and the spray ports 22 on both sides are connected to the liquid injection pipeline 21, so that the cleaning liquid can be sprayed onto the electrode lug 210 from both sides of the first channel along the first direction Z through the spray ports 22, improving the cleaning effect.

[0067] Please refer to Figure 4, in some optional embodiments, a plurality of spray nozzles 22 are provided on the first plate body 11, and at least part of the plurality of spray nozzles 22 are arranged at intervals along the second direction X, so that the surface of the tab 210 can be sprayed through the plurality of spray nozzles 22. Each spray nozzle 22 sprays a small amount of cleaning liquid, the cleaning is more uniform, the cleaning effect is better, and at the same time, the amount of cleaning liquid sprayed by each spray nozzle 22 can be reduced, so that it is more convenient to control the cleaning area and reduce the risk of moisture entering the tab body 220.

[0068] Optionally, the spray nozzles 22 can be grouped along the second direction X into a plurality of spray nozzle groups. Each spray nozzle group includes a plurality of spray nozzles 22 arranged at intervals along the third direction Y. By arranging the spray nozzles 22 at intervals along the third direction Y, the number of spray nozzles 22 can be further increased, making the spraying of the cleaning liquid more uniform. Optionally, the third direction Y is the width direction of the tab 200.

[0069] In some optional embodiments, along the liquid outlet direction of the spray nozzle 22, the axis of the spray nozzle 22 is inclined towards the second plate body 12. By adopting the inclined liquid outlet method to spray the tab 210, the flow direction of the cleaning liquid can be better controlled, so that the cleaning liquid sprayed onto the surface of the tab 210 can flow out along the direction away from the tab body 220, further reducing the risk of moisture entering the tab body 220.

[0070] Please refer to Figure 4 , in some optional embodiments, the cleaning module 10 further includes a recovery pipeline 3. The recovery pipeline 3 is arranged in the first channel and on the side close to the second plate body 12 to recover the cleaning liquid in the first channel. By arranging the recovery pipeline 3 on the side close to the second plate body 12, the cleaning liquid can be recovered after the particles on the surface of the tab 210 are washed away by the cleaning liquid.

[0071] Optionally, the recovery pipeline 3 can be arranged at the lowest point of the first mounting seat 1 along the first direction Z, so that the cleaning liquid can flow into the recovery pipeline 3 under its own gravity, making it more convenient to recover the cleaning liquid.

[0072] In some optional embodiments, the tab cleaning device 100 further includes a blocking member 4 arranged on the first mounting seat 1. The blocking member 4 is at least partially located at the edge of the first plate body 11 and is used to block the cleaning liquid in the first channel.

[0073] By arranging the blocking member 4 at the edge of the first plate body 11, the blocking member 4 can be used to block the cleaning liquid in the first channel, reduce the possibility of the cleaning liquid splashing out of the first channel, further reduce the risk of moisture entering the tab body 220, and improve the reliability of cleaning.

[0074] Optionally, the blocking member 4 at least includes a first blocking portion 4a. The first blocking portion 4a is disposed along the third direction Y at one side edge of the first plate body 11 away from the second plate body 12 and extends along the second direction X. Thus, during the transportation of the electrode sheet, the first blocking portion 4a can be blocked along the third direction Y between the tab 210 and the electrode sheet body 220, so as to reduce the risk of moisture entering the electrode sheet body 220 and improve the cleaning effect.

[0075] Further, the blocking member 4 may further include a second blocking portion 4b. The second blocking portion 4b is disposed along the second direction X at both side edges of the first plate body 11 and extends along the third direction Y. Thus, through the combined action of the first blocking portion 4a and the second blocking portion 4b, the cleaning liquid can be restricted within the first channel, so that after the cleaning liquid is sprayed onto the tab 210, it can be completely recovered by the recovery pipeline 3, improving the reliability of the electrode sheet cleaning device 100.

[0076] Please refer to Figures 1 to 4 , in some optional embodiments, the blocking member 4 includes a first air inlet pipeline 41 and an air knife 42 communicated with the first air inlet pipeline 41. The air knife 42 is distributed along the edge of the first plate body 11 to form an air wall.

[0077] By using the air knife 42 to blow out a flat air flow along the first direction Z to form an air wall at the edge of the first channel, it can effectively prevent the cleaning liquid from diffusing outside the first channel, thereby restricting the cleaning liquid within the first channel. At the same time, the structure is simple and reliable, and the efficiency is higher.

[0078] It can be understood that during the transportation of the electrode sheet, in addition to considering restricting the cleaning liquid within the first channel, it is also necessary to consider the cleaning effect of the electrode sheet cleaning device 100 on the tab 210.

[0079] In some optional embodiments, the cleaning member 2 further includes a brushing portion 23. The brushing portion 23 is disposed on the first plate body 11 while avoiding the spray opening 22 and extends a preset distance from the first plate body 11 into the first channel.

[0080] By providing the brushing portion 23 on the first plate body 11, while spraying the cleaning liquid onto the surface of the tab 210, the surface of the tab 210 can be brushed by the brushing portion 23, so as to more reliably remove the metal chips on the surface of the tab 210 and improve the cleaning effect. Through process simulation, the electrode sheet cleaning device 100 in the embodiment of the present application can achieve a removal efficiency of more than 90% of the metal chips at the tab 210 of the electrode sheet 200, significantly improving the performance of the electrode sheet.

[0081] Optionally, the brushing portion 23 is provided as several clusters of brushes. The several clusters of brushes are disposed along the second direction X between adjacent two spray opening groups, so as to be able to brush the surface of the tab 210 at multiple places and improve the cleaning effect.

[0082] Optionally, the brush extends a preset distance from the first plate body 11 into the first channel. Specifically, during the transportation of the electrode sheet, the end of the brush overlaps with the surface of the tab 210, and the overlap amount can be set to 1 mm to 2 mm to improve the brushing effect of the brush on the surface of the tab 210.

[0083] In some alternative embodiments, the distance between the opposite first plate bodies 11 in the first direction Z is adjustable. By adjusting the distance between the first plate bodies 11 in the first direction Z, the overlap amount between the brush and the tab 210 can be adjusted, which can be adapted to various specifications of electrode sheets. At the same time, after the electrode sheet cleaning device 100 has been used for a period of time, the overlap amount between the brush and the tab 210 can be readjusted to improve the brushing effect of the brush on the tab 210.

[0084] It can be understood that the distance between the paired first plate bodies 11 in the first direction Z is adjustable. For example, at least one first plate body 11 is movably connected to the second plate body 12 in the first direction Z. By adjusting the position of the first plate body 11 relative to the second plate body 12, the distance between the opposite first plate bodies 11 in the first direction Z can be adjusted.

[0085] Optionally, the first plate body 11 and the second plate body 12 can be at least partially overlapped in the first direction Z, and connection holes are correspondingly provided in the overlapping area of the first plate body 11 and the second plate body 12. The first mounting seat 1 further includes a screw rod and a locking nut threadedly connected to the screw rod. The screw rod sequentially passes through the connection holes of the first plate body 11 and the second plate body 12, so that the position of the first plate body 11 relative to the second plate body 12 can be adjusted, and after adjustment, the first plate body 11 can be locked to the predetermined position of the second plate body 12 by the locking nut.

[0086] In some alternative embodiments, the cleaning module 10 further includes a drying member 6. The drying member 6 is disposed in the first channel and is located downstream of the cleaning member 2 along the transportation direction of the electrode sheet. The drying member 6 is used to dry the tab.

[0087] By arranging the drying member 6 downstream of the cleaning member 2, the drying member 6 can be used to dry the cleaning liquid on the surface of the tab 210, reduce the residual amount of the cleaning liquid attached to the tab 210, and thus improve the cleaning quality of the tab 210. At the same time, by disposing the drying member 6 in the first channel, that is, both the drying member 6 and the cleaning member 2 are disposed on the first mounting seat 1, the structure of the electrode sheet cleaning device can be simplified.

[0088] Please refer to Figures 1 to 5, in some alternative embodiments, the electrode tab cleaning device 100 further includes a drying module 20. The drying module 20 is disposed downstream of the cleaning module 10 along the second direction X and is combined with the cleaning module 10 to form a cleaning module group. The drying module 20 includes a second mounting base 5 and a drying member 6. The second mounting base 5 has a second channel which is adapted to the electrode tab 210 and extends along the second direction X. The drying member 6 is disposed in the second channel and is used for drying the electrode tab 210.

[0089] By separately arranging the cleaning module 10 and the drying module 20, it is more convenient to install and adjust the positions of the cleaning module 10 and the drying module 20, improving controllability. Among them, the drying module 20 is disposed downstream of the cleaning module 10, so that after the electrode tab 210 of the electrode sheet 200 is cleaned by the cleaning module 10, the drying module 20 can be used to dry the cleaning liquid on the surface of the electrode tab 210, reducing the residual amount of the cleaning liquid adhering to the electrode tab 210, and further improving the cleaning quality of the electrode tab 210.

[0090] For the convenience of description, hereinafter, the cleaning module 10 and the drying module 20 are separately arranged and combined to form a cleaning module group as an example for illustration.

[0091] In some alternative embodiments, the number of the cleaning module groups is more than two, and the more than two cleaning module groups are spaced along the second direction X. Thus, during the conveying process of the electrode sheet 200, the electrode sheet 200 can be repeatedly cleaned and dried by the more than two cleaning module groups, improving reliability.

[0092] In some alternative embodiments, the more than two cleaning module groups are oppositely arranged on both sides of the electrode sheet 200 along the third direction Y and are adapted to the electrode tabs 210 on both sides of the electrode sheet 200.

[0093] For the case where the electrode tabs 210 are provided on both sides of the electrode sheet 200 along the third direction Y, the electrode tab cleaning device can also be provided with cleaning module groups on both sides of the electrode sheet 200, so that the electrode tabs on both sides of the electrode sheet 200 can be simultaneously cleaned and dried, improving the cleaning efficiency.

[0094] Optionally, the electrode tab cleaning device 100 may further include a bracket 30. The first mounting base 1 and the second mounting base 5 are respectively connected to the bracket 30 to realize the positioning and installation of the cleaning module group. In addition, the first mounting base 1 and the second mounting base 5 can be located at the same height along the first direction Z, so that it is more convenient for the electrode tabs 210 of the electrode sheet 200 to sequentially pass through the first channel and the second channel, realizing the on-line cleaning and drying of the electrode tabs 210.

[0095] In some optional embodiments, the second mounting seat 5 includes a third plate body 51 and a fourth plate body 52. The third plate bodies 51 are arranged in pairs along the first direction Z, and the fourth plate body 52 is connected to one end of each third plate body 51 and encloses a second channel with the third plate body 51.

[0096] Optionally, similar to the first mounting seat 1, the second mounting seat 5 is also arranged in a U-shaped structure, so that the drying area can be controlled within the second channel, thereby more reliably drying the tab to improve the reliability of drying. At the same time, by setting the second mounting seat 5 and the first mounting seat 1 to have the same structure, the installation and manufacturing difficulty can also be simplified, and the cost can be reduced.

[0097] Optionally, the drying module 20 can dry the tab 210 by at least one of blowing and liquid absorption.

[0098] When drying is performed by the liquid absorption method, in some embodiments, the drying member 6 can be set as absorbent cotton, so that when the tab 210 passes through the second channel, the cleaning liquid on the tab 210 can be absorbed by the absorbent cotton to reduce the residual amount of the cleaning liquid on the tab 210, thereby improving the cleaning quality of the tab 210.

[0099] Please refer to Figure 1 and Figure 5 , when drying is performed by the blowing method, in some optional embodiments, the drying member 6 includes a second air inlet pipeline 61 and a nozzle 62 communicated with the second air inlet pipeline 61. The nozzle 62 is arranged on the surface of the third plate body 51 facing the second channel and is configured to blow air into the second channel.

[0100] For example, the drying member 6 can include a second air inlet pipeline 61 and a nozzle 62. The second air inlet pipeline 61 can be used to access compressed air and can blow compressed air onto the surface of the tab 210 through the nozzle 62, thereby drying the cleaning liquid remaining on the surface of the tab 210 to achieve the drying of the tab 210 and improve the cleaning quality of the tab 210.

[0101] Optionally, the number of nozzles 62 can be set to more than two, and the more than two nozzles 62 are spaced along the second direction X, so that the surfaces of the tab 210 can be dried by multiple nozzles 62 at the same time to improve the drying efficiency.

[0102] In some optional embodiments, along the blowing direction of the nozzle 62, the nozzle 62 is inclined toward the side of the fourth plate body 52, so that the cleaning liquid on the surface of the tab 210 can be blown toward the edge of the tab 210 through the nozzle 62, realizing the rapid drying of the tab 210, and being able to reduce the influence on the performance of the tab 210 after rapid drying, realizing the normal winding of the electrode sheet, and improving the performance of the electrode sheet.

[0103] Please refer to Figures 1 to 5 , taking the electrode sheet cleaning device 100 and the electrode sheet manufacturing equipment provided by an embodiment of the present application as an example, to illustrate the specific structures of the electrode sheet cleaning device 100 and the electrode sheet manufacturing equipment.

[0104] The electrode sheet manufacturing equipment includes an electrode sheet conveying mechanism, a cutting mechanism, an electrode sheet cleaning device 100, and a dust removal mechanism. The electrode sheet conveying mechanism is used to sequentially convey the electrode sheet strip to the cutting mechanism, the electrode sheet cleaning device 100, and the dust removal mechanism. The cutting mechanism is used to cut the electrode sheet strip to form a plurality of electrode sheets 200 with tabs 210. The electrode sheet cleaning device 100 is arranged on the tab side of the electrode sheet 200 to clean the tabs 210 and remove the metal chips remaining on the tabs 210 due to cutting. The dust removal mechanism is arranged downstream of the electrode sheet cleaning device 100 to absorb the dust attached to the main body 220 of the electrode sheet, thereby reducing the self-discharge or even short-circuit risk of the battery cell and improving the battery performance.

[0105] Among them, the electrode sheet cleaning device 100 includes a bracket 30 and a cleaning module 10 and a drying module 20 arranged on the bracket 30. The cleaning module 10 includes a first mounting seat 1 and a cleaning member 2 arranged in the first channel of the first mounting seat 1. The cleaning member 2 includes a liquid injection pipeline 21, a spray nozzle 22, and a brushing part 23 arranged on both sides of the first channel along the first direction Z. The drying module 20 includes a second mounting seat 5 and a drying member 6 arranged in the second channel of the second mounting seat 5. The drying member 6 includes a second air inlet pipeline 61 and an air nozzle 62 arranged on both sides of the second channel along the first direction Z.

[0106] The first channel and the second channel are adapted to the tabs 210. During the process of conveying the electrode sheet to the electrode sheet cleaning device 100, the tabs 210 will first enter the first channel of the cleaning module 10, and the cleaning liquid is sprayed on the tabs 210 through the spray nozzle 22 and the brushing part 23 for flushing, realizing the on-line cleaning of both surfaces of the tabs 210. Then the tabs 210 will enter the second channel of the drying module 20, and compressed gas is blown onto the surface of the tabs 210 through the drying member 6 to realize the rapid drying of the tabs 210, reducing the residual amount of the cleaning liquid on both surfaces of the tabs 210, thereby completing the on-line cleaning and drying of the tabs 210.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pole piece cleaning device, used for a pole piece, the pole piece comprising a pole piece body and a pole ear arranged on at least one side of the pole piece body, characterized in that: The pole piece cleaning device comprises a cleaning module, and the cleaning module comprises: A first mounting seat, comprising a first plate and a second plate, wherein the first plates are arranged in pairs along the thickness direction of the pole piece, and the second plates are connected to one end of each of the first plates and enclosed with the first plates to form a first channel, wherein the first channel is adapted to the pole lug and is extended along the conveying direction of the pole piece; A cleaning member is disposed on at least one of the first plates and is used for cleaning the tabs.

2. The electrode cleaning device according to claim 1, characterized in that: The cleaning component includes a liquid injection pipeline and a spray port opened on the surface of the first plate body facing the first channel. The liquid injection pipeline is used to inject cleaning liquid and spray the cleaning liquid onto the surface of the pole ear through the spray port.

3. The pole piece cleaning device according to claim 2, characterized in that: Along the liquid outlet direction of the spray port, the axis of the spray port is inclined toward the second plate body.

4. The pole piece cleaning device according to claim 3, characterized in that: The pole piece cleaning device further includes a recovery pipeline, which is arranged in the first channel and located on a side close to the second plate body to recover the cleaning liquid in the first channel.

5. The pole piece cleaning device according to claim 2, characterized in that: The pole piece cleaning device also includes a blocking member disposed on the mounting seat, wherein the blocking member is at least partially located at an edge of the first plate body and is used to block the cleaning liquid in the first channel.

6. The pole piece cleaning device according to claim 5, characterized in that: The blocking member includes a first air inlet pipeline and an air knife connected to the first air inlet pipeline. The air knife is distributed along the edge of the first plate body to form an air wall.

7. The pole piece cleaning device according to claim 2, characterized in that: The cleaning member further includes a brushing portion, which is arranged on the first plate body to avoid the spray port and extends from the first plate body toward the first channel by a preset distance.

8. The electrode cleaning device according to any one of claims 1 to 7, characterized in that: The spacing between the first plates arranged in pairs along the thickness direction of the pole piece is adjustable.

9. The electrode cleaning device according to any one of claims 1 to 7, characterized in that: The cleaning module further includes a drying member, which is disposed in the first channel and is located downstream of the cleaning member along the conveying direction of the electrode piece, and is used for drying the electrode tab.

10. The electrode cleaning device according to any one of claims 1 to 7, characterized in that: The electrode cleaning device further comprises a drying module, which is arranged downstream of the cleaning module along the conveying direction of the electrode and is combined with the cleaning module to form a cleaning module; The drying module includes a second mounting seat and a drying member. The second mounting seat has a second channel. The second channel is adapted to the pole tab and extends along the conveying direction of the pole piece. The drying member is arranged in the second channel and is used to dry the pole tab.

11. The pole piece cleaning device according to claim 10, characterized in that: The number of the cleaning modules is more than two, and the more than two cleaning modules are arranged at intervals along the conveying direction of the electrode piece; And / or, two or more cleaning modules are relatively arranged on both sides of the pole piece and are adapted to the pole ears on both sides of the pole piece.

12. The electrode cleaning device according to claim 10, characterized in that: The second mounting seat includes a third plate and a fourth plate. The third plates are arranged in pairs along the thickness direction of the pole piece. The fourth plate is connected to one end of each of the third plates and encloses the third plates to form the second channel.

13. The electrode cleaning device according to claim 12, characterized in that: The drying element includes a second air inlet pipeline and an air nozzle connected to the second air inlet pipeline. The air nozzle is arranged on the surface of the third plate body facing the second channel and is configured to blow air into the second channel.

14. The pole piece cleaning device according to claim 13, characterized in that: Along the blowing direction of the air nozzle, the air nozzle is inclined toward one side of the fourth plate body.

15. A pole piece manufacturing device, characterized in that: include: The pole piece conveying mechanism is used to convey the pole piece material strip; A cutting mechanism, disposed on one side of the electrode sheet conveying mechanism and configured to cut the electrode sheet strip into a plurality of electrode sheets with electrode ears; A pole piece cleaning device, which is the pole piece cleaning device according to any one of claims 1 to 14, wherein the pole piece cleaning device is adapted to the pole lug and is used to clean the pole lug.

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