CN114050059A - Foamed aluminum pole piece coating equipment and pole piece manufacturing method applying same - Google Patents

Abstract

The application provides a foamed aluminum pole piece coating device and a pole piece manufacturing method applying the same. The foamed aluminum pole piece coating equipment comprises: the slurry pool comprises an extrusion roller, the slurry pool is provided with a first cavity, the extrusion roller is arranged in the first cavity containing the slurry, the extrusion roller comprises a roller and a blade connected with the roller, the blade is formed by protruding and extending towards the outer side of the roller, and the extrusion roller is used for guiding the slurry to the foamed aluminum pole piece through rotating the blade; the scraping plate mechanism comprises a first scraping plate and a second scraping plate which are arranged at intervals, wherein comb-shaped tooth structures are arranged on the first scraping plate and the second scraping plate respectively and used for scraping partial slurry on the surface of the foamed aluminum; and the driving mechanism is arranged on one side, away from the slurry pool, of the scraping plate mechanism and is used for driving the foamed aluminum pole piece to displace relative to the scraping plate mechanism and the slurry pool. The foamed aluminum pole piece coating equipment can ensure that slurry in foamed aluminum is densely filled, and can realize the effects of automatic coating, scraping of redundant slurry, standing for drying, accurate control of pole piece thickness and the like.

Description

Foamed aluminum pole piece coating equipment and pole piece manufacturing method applying same

Technical Field

The application relates to the field of new energy, in particular to foamed aluminum pole piece coating equipment and a pole piece manufacturing method applying the same.

Background

The capacitance carbon carrier material used in the mainstream super capacitor is aluminum foil. However, the coating thickness of the aluminum foil and the carbon carrying amount of the aluminum foil are limited, so that the voltage window bottleneck of the supercapacitor cannot be broken through all the time. Therefore, the three-dimensional porous current collector becomes a new development and research trend in the industry, but the foamed aluminum three-dimensional current collector is different from the conventional aluminum foil coating mode, the tension and winding performance of the foamed aluminum three-dimensional current collector are far inferior to those of an aluminum foil, the coating permeability and uniformity requirements are high, and the conventional aluminum foil coating mode cannot be utilized for proper industrial production.

At present, three-dimensional through hole foamed aluminum products are relatively few as pole pieces, the conventional pole piece aluminum foil is processed in an extrusion coating mode, the extrusion coating is mainly realized in a single-side extrusion mode at present, and the aluminum foil quickly passes through the lower part of an extrusion coating head to realize the coating of the surface of the aluminum foil. The process is suitable for the continuous winding type aluminum foil, but if the process is adopted for the three-dimensional through hole foamed aluminum, coating slurry can pass through the foamed aluminum, so that a large amount of material leaks in the coating process, the material waste is caused, and the production cost is high; and the foamed aluminum pole piece is of a three-dimensional structure, slurry needs to be uniformly filled in the three-dimensional structure, and the thickness of the slurry on two sides of the pole piece is not uniform due to single-side extrusion coating, so that the yield of the pole piece is influenced. How to solve the above problems needs to be considered by those skilled in the art.

Disclosure of Invention

In order to solve the problems in the prior art, the application provides a foamed aluminum pole piece coating device suitable for manufacturing a foamed aluminum pole piece and a pole piece manufacturing method using the same.

The embodiment of the application provides a foamed aluminum pole piece coating equipment for carry out active material's coating to foamed aluminum pole piece, include: the slurry tank comprises a squeezing roller, the slurry tank is provided with a first cavity, the squeezing roller is arranged in the first cavity containing the slurry, the squeezing roller comprises a roller and a blade connected with the roller, the blade is formed by protruding and extending towards the outer side of the roller, and the squeezing roller is used for enabling the blade to guide the slurry to the foamed aluminum pole piece through rotation; the scraping plate mechanism comprises a first scraping plate and a second scraping plate which are arranged at intervals, wherein comb-shaped tooth structures are arranged on the first scraping plate and the second scraping plate respectively and are used for scraping partial slurry on the surface of the foamed aluminum; and the driving mechanism is arranged on one side, away from the slurry pool, of the scraping plate mechanism and is used for driving the foamed aluminum pole piece to displace relative to the scraping plate mechanism and the slurry pool.

Furthermore, the extrusion roller can roll towards the reverse direction of the movement of the foamed aluminum pole piece, the slurry is pushed to the foamed aluminum pole piece, and the slurry is reversely pressed into the foamed aluminum pores, so that the slurry can be fully filled in the foamed aluminum pole piece, and the filling rate is improved; the first scraper blade and the second scraper blade can position and shape the foamed aluminum pole piece, and the comb-shaped tooth structure can reduce the damage to the three-dimensional structure of the foamed aluminum pole piece while scraping partial slurry to enable the two sides to have better uniformity.

In one possible embodiment, the number of the vanes is multiple, a plurality of the vanes are arranged around the roller surface at intervals, and the height of each vane is larger than 6mm compared with the height of the roller surface.

In a possible embodiment, the squeeze roll comprises a roll barrel and a plurality of blades connected with the roll barrel, the blades extend towards the outer side of the roll barrel, and the blades are arranged at intervals.

In a possible embodiment, the first scraper and the second scraper are disposed at two sides of the moving path of the foamed aluminum pole piece at an interval, the comb-shaped tooth structure includes a first comb-shaped tooth and a second comb-shaped tooth, the first comb-shaped tooth is disposed at a first end of the first scraper facing the second scraper, and the second comb-shaped tooth is disposed at a second end of the second scraper facing the first scraper.

In a possible embodiment, the scraping mechanism further comprises a fine adjustment unit, and the fine adjustment unit is in transmission connection with the comb-shaped tooth structure and is used for adjusting the protruding amount of the comb-shaped tooth structure towards the foamed aluminum pole piece.

In a possible embodiment, the scraper mechanism is formed with a through hole provided at a side of a moving path of the foamed aluminum pole piece, the through hole being used for the driving mechanism to pass through the scraper mechanism.

In a possible embodiment, the slurry tank further includes a first casing and a second casing, the first casing encloses the first cavity, the second casing is disposed outside the first casing and encloses the first casing to form a second cavity, and the first cavity and the second cavity are spaced apart.

In a possible embodiment, the slurry tank further includes a first feeding pipe and a first discharging pipe, the first feeding pipe and the first discharging pipe pass through the first shell and the second shell and communicate with the first cavity, the slurry tank further includes a second feeding pipe and a second discharging pipe, and the second feeding pipe and the second discharging pipe pass through the second shell and communicate with the second cavity.

In a possible embodiment, the driving mechanism comprises a first driving unit and a mechanical arm in transmission connection with the first driving unit, and the mechanical arm is used for clamping the foamed aluminum pole piece.

The embodiment of the application also provides a pole piece manufacturing method, and the equipment for coating the foamed aluminum pole piece comprises the following steps:

fixing the foamed aluminum pole piece on the driving mechanism, and enabling the driving mechanism to drive the foamed aluminum pole piece to be immersed into the first cavity of the slurry tank along a first direction;

the first scraper and the second scraper move towards the foamed aluminum pole piece and position the foamed aluminum pole piece;

the driving mechanism drives the foamed aluminum pole piece to reversely leave the first cavity along the first direction, and meanwhile, a tangent line of a point close to the foamed aluminum pole piece faces the first direction when the extrusion roller rotates so as to push the slurry to the foamed aluminum pole piece; and

the driving mechanism further drives the foamed aluminum pole piece to leave the first cavity along the reverse direction of the first direction, so that the comb-shaped tooth structure scrapes off at least part of slurry attached to the foamed aluminum pole piece.

Compared with the prior art, according to the foam aluminum pole piece coating equipment, the squeeze roller can roll towards the reverse direction of the motion of the foam aluminum pole piece, the slurry is pushed to the foam aluminum pole piece and is reversely pressed into the foam aluminum pore space, so that the slurry can be fully filled in the foam aluminum pole piece, and the filling rate is improved; the first scraper blade and the second scraper blade can position and shape the foamed aluminum pole piece, and the comb-shaped tooth structure can reduce the damage to the three-dimensional structure of the foamed aluminum pole piece while scraping partial slurry to enable the two sides to have better uniformity.

According to the pole piece manufacturing method, the coating sufficiency and uniformity in the foamed aluminum pole piece with high porosity can be improved, so that the pole piece is densely coated, the cavity proportion is reduced, and the maximum carbon carrying amount of the foamed aluminum pole piece is increased. The utility model provides a foamed aluminum pole piece coating equipment utilizes infiltration and roll-in to the foamed aluminum pole piece, when guaranteeing that the packing of thick liquids is closely knit in the foamed aluminum, can realize automatic coating, strike off unnecessary thick liquids, stew and treat efficiency such as dry, accurate control pole piece thickness.

Drawings

Fig. 1 is a schematic structural diagram of a foamed aluminum pole piece coating apparatus according to an embodiment of the present application.

Fig. 2 is an angular cross-sectional view of a slurry tank of an apparatus for coating an aluminum foam pole piece according to an embodiment of the present disclosure.

Fig. 3 is another schematic angular cross-sectional view of the slurry tank of the foamed aluminum pole piece coating apparatus according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a scraper mechanism of a foamed aluminum pole piece coating device according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a scraper mechanism of a foamed aluminum pole piece coating device according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a driving mechanism of a foamed aluminum pole piece coating apparatus according to an embodiment of the present application.

Description of the main elements

Foamed aluminum pole piece coating equipment 1

Slurry tank 11

The squeeze roll 110

Roller 1101

Blade 1102

First squeeze roll 111

Second squeeze roll 112

First housing 113

Second casing 114

First cavity 115

Second cavity 116

First feed tube 1171

First discharge pipe 1172

Second feeding pipe 1181

Second discharge pipe 1182

Stirring roller 119

Scraper mechanism 12

Comb tooth structure 120

First scraper 121

First end 1210

Second scraper 122

Second end 1220

First comb teeth 123

Second comb tooth 124

Fine adjustment unit 125

Slide rail 126

Adjusting cylinder 127

Through hole 128

Drive mechanism 13

First driving unit 131

Robot arm 132

First arm 1321

Second mechanical arm 1322

First direction X

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The following description will refer to the accompanying drawings to more fully describe the present disclosure. There is shown in the drawings exemplary embodiments of the present application. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals designate identical or similar components.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, as used herein, "comprises" and/or "comprising" and/or "having," integers, steps, operations, components, and/or components, but does not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, unless otherwise defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application and will not be interpreted in an idealized or overly formal sense.

The following description of exemplary embodiments refers to the accompanying drawings. It should be noted that the components depicted in the referenced drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar terms.

Embodiments of the present application will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, an embodiment of the present application provides a foamed aluminum pole piece coating apparatus 1, where the foamed aluminum pole piece coating apparatus 1 is used to coat an active substance on a foamed aluminum pole piece.

The foamed aluminum pole piece coating device 1 comprises a slurry tank 11, a scraper mechanism 12 and a driving mechanism 13. The slurry pool 11 comprises a squeezing roller 110, the slurry pool 11 is provided with a first cavity 115, the squeezing roller 110 is arranged in the first cavity 115 containing the slurry, the squeezing roller 110 comprises a roller barrel 1101 and a blade 1102 connected with the roller barrel 1101, the blade 1102 protrudes towards the outer side of the roller barrel 1101, and the squeezing roller 110 is used for enabling the blade 1102 to guide the slurry to the foamed aluminum pole piece through rotation. The scraping mechanism 12 includes a first scraping plate 121 and a second scraping plate 122 arranged at an interval, the first scraping plate 121 and the second scraping plate 122 are both provided with comb-shaped tooth structures 120, and the comb-shaped tooth structures 120 are used for scraping off partial slurry on the surface of the foamed aluminum pole piece. The driving mechanism 13 is arranged on one side of the scraping plate mechanism 12 far away from the slurry pool 11 and is used for driving the foamed aluminum pole piece to displace relative to the scraping plate mechanism 12 and the slurry pool 11.

Furthermore, the squeeze roll 110 can roll in the reverse direction of the motion of the foamed aluminum pole piece, push the slurry to the foamed aluminum pole piece, and form reverse pressure (push) on the slurry to enter the foamed aluminum pore space, so that the slurry can be fully filled in the foamed aluminum pole piece, and the filling rate is improved; the first scraper 121 and the second scraper 122 can position and shape the foamed aluminum pole piece, and the comb-shaped tooth structure 120 can reduce damage to the three-dimensional structure of the foamed aluminum pole piece while scraping off part of slurry to enable the two sides to have better uniformity.

In one possible embodiment, the pressing roller 110 includes a first pressing roller 111 and a second pressing roller 112, and the first pressing roller 111 and the second pressing roller 112 are disposed at two sides of the soaking path of the foamed aluminum pole piece at intervals. In this embodiment, the first pressing roll 111 and the second pressing roll 112 may be disposed substantially symmetrically on two opposite sides of the soaking path of the foamed aluminum electrode sheet, so as to improve the uniformity of coating or filling on two sides of the foamed aluminum electrode sheet.

In one possible embodiment, the number of the blades 1102 may be multiple, the multiple blades 1102 are spaced around the surface of the drum 1101, the height of the protrusions (height of the blades 1102) of each blade 1102 compared to the surface of the drum 1101 is greater than 6mm, and further, the height of the protrusions (height of the blades 1102) of each blade 1102 compared to the surface of the drum 1101 may be greater than 1cm, preferably greater than 1.5cm or greater than 2 cm. In this embodiment, the squeeze roll 110 generates a pushing force through the blades 1102 and the gaps between adjacent blades 1102 during rotation, pressing the slurry into the gaps of the foamed aluminum pole pieces to increase the filling rate. Specifically, the blades 1102 on the squeeze roll 110 may have a larger length (height) to make them different from the common grooves or ribs, and the rotating blades 1102 may actually drive or push the slurry during the rotation of the squeeze roll 110, so as to guide the slurry to the foamed aluminum pole pieces, and make the slurry fully fill in the gaps of the foamed aluminum pole pieces.

In one possible embodiment, the slurry tank 11 further includes a first housing 113 and a second housing 114. The first housing 113 encloses to form a first cavity 115, and the second housing 114 is disposed around the first housing 113 and encloses with the first housing 113 to form a second cavity 116. The first cavity 115 is spaced from the second cavity 116.

In a possible embodiment, the slurry tank 11 further includes a first feeding pipe 1171 and a first discharging pipe 1172, and the first feeding pipe 1171 and the first discharging pipe 1172 pass through the first housing 113 and the second housing 114 and communicate with the first cavity 115, so as to inject and discharge the slurry into and from the first cavity 115, and ensure that the slurry in the slurry tank 11 is within a reasonable range. In this embodiment, the first feeding pipe 1171 and the first discharging pipe 1172 pass through the second housing 114 and are isolated from the second cavity 116, and the first feeding pipe 1171 and the first discharging pipe 1172 may be connected to the first housing 113 at a region adjacent to the first cavity 115.

In one possible embodiment, slurry tank 11 further includes a second feed pipe 1181 and a second discharge pipe 1182, and second feed pipe 1181 and second discharge pipe 1182 pass through second housing 114 and communicate with second cavity 116 for injecting a liquid, such as thermostatic water, into second cavity 116. In the present embodiment, the slurry in the first cavity 115 may be insulated or cooled by injecting constant-temperature water into the second cavity 116 surrounding the first cavity 115.

In a possible embodiment, the slurry tank 11 further includes a stirring roller 119, the stirring roller 119 is disposed in the first cavity 115 and spaced apart from the squeezing roller 110, and the stirring roller 119 may be disposed at the bottom of the first cavity 115 for stirring the slurry, so as to reduce the probability of deposition and other problems.

In one possible embodiment, the first scraper 121 and the second scraper 122 are disposed at two sides of the moving path of the foamed aluminum pole piece at an interval, the comb-shaped tooth structure 120 includes a first comb-shaped tooth 123 and a second comb-shaped tooth 124, the first comb-shaped tooth 123 is disposed at a first end 1210 of the first scraper 121 facing the second scraper 122, and the second comb-shaped tooth 124 is disposed at a second end 1220 of the second scraper 122 facing the first scraper 121.

In this embodiment, the comb-teeth structure 120 may be a structure including a plurality of hair-like thin lines with certain toughness and at the same time having a deformable ability, so that the comb-teeth structure 120 can effectively scrape off the slurry on the surface of the foamed aluminum electrode sheet while not damaging the porous three-dimensional structure of the foamed aluminum electrode sheet when contacting with the foamed aluminum material coated with the slurry.

In a possible embodiment, the scraping mechanism 12 further comprises a fine-tuning unit 125, and the fine-tuning unit 125 is in transmission connection with the comb-tooth structure 120 for adjusting the protruding amount of the comb-tooth structure 120 towards the foamed aluminum pole piece. In this embodiment, the fine adjustment unit 125 may be two micrometers, and the two micrometers are respectively connected to the first scraper 121 and the second scraper 122.

In a possible embodiment, the scraping mechanism 12 further includes a slide rail 126 and an adjusting cylinder 127, the first scraping plate 121 and the second scraping plate 122 are respectively connected with the adjusting cylinder 127 in a transmission manner, and the first scraping plate 121 and the second scraping plate 122 are respectively movably disposed on the slide rail 126. The adjusting cylinder 127 drives the first scraper 121 and the second scraper 122 to approach or separate from the foamed aluminum pole piece.

In a possible embodiment, the scraper mechanism 12 is formed with a through hole 128, the through hole 128 being provided on the side of the path of travel of the foamed aluminium pole piece, the through hole 128 being used for passing the drive mechanism 13 through the scraper mechanism. In the present embodiment, the number of the through holes 128 is two, two through holes 128 are disposed on two sides perpendicular to the thickness direction of the foamed aluminum pole piece (along the width direction of the foamed aluminum pole piece), and each through hole 128 can be formed by splicing two semi-circular grooves respectively formed on the first scraper 121 and the second scraper 122.

In one possible embodiment, the driving mechanism 13 includes a first driving unit 131 and a mechanical arm 132 in transmission connection with the first driving unit 131, wherein the mechanical arm 132 is used for clamping the foamed aluminum pole piece. The mechanical arm 132 includes a first mechanical arm 1321 and a second mechanical arm 1322 arranged at an interval, the first mechanical arm 1321 and the second mechanical arm 1322 can respectively clamp the plastic parts on the two side edges of the foamed aluminum pole piece and drive the foamed aluminum pole piece to be immersed into or separated from the slurry tank 11, and the first mechanical arm 1321 and the second mechanical arm 1322 can pass through the scraper mechanism 12 through the through hole 128 during the moving process.

The embodiment of the application further provides a pole piece manufacturing method, and the pole piece manufacturing method using the foamed aluminum pole piece coating equipment 1 comprises the following steps:

step S1: the foamed aluminum electrode sheet is fixed to the driving mechanism 13, so that the driving mechanism 13 drives the foamed aluminum electrode sheet to be immersed into the first cavity 115 of the slurry tank 11 along the first direction X.

The foamed aluminum electrode sheet can be clamped by the first mechanical arm 1321 and the second mechanical arm 1322, so that the first driving unit 131 drives the mechanical arm 132 to drive the foamed aluminum electrode sheet to be immersed in the slurry along the first direction X.

Step S2: the first scraper 121 and the second scraper 122 move towards the foamed aluminum pole piece and position the foamed aluminum pole piece.

Before at least part of the foamed aluminum pole piece is immersed in the slurry and taken out reversely, the first scraper blade 121 and the second scraper blade 122 are clamped tightly to scrape the redundant slurry on the surface of the foamed aluminum pole piece and position and shape the foamed aluminum pole piece.

Step S3: the driving mechanism 13 drives the foamed aluminum pole piece to leave the first cavity 115 along the direction opposite to the first direction X, and simultaneously, the tangent line of the point close to the foamed aluminum pole piece faces the first direction X when the squeeze roll 110 rotates, so that the slurry is pushed to the foamed aluminum pole piece.

Step S2 and step S3 may be performed continuously at the same time, before the foamed aluminum electrode sheet moves away from the slurry pool 11 in the reverse direction of the first direction X, the squeeze roller 110 is rotated, and during the rotation, a tangent line of a point of the squeeze roller 110 close to the foamed aluminum electrode sheet is oriented to the first direction X, that is, the slurry is pushed to the foamed aluminum electrode sheet in the reverse direction, so that the slurry is filled in the pores of the foamed aluminum electrode sheet as much as possible.

Step S4: the driving mechanism 13 further drives the foamed aluminum electrode sheet to leave the first cavity 115 along the first direction X, so that the comb-shaped tooth structure 120 scrapes off at least a portion of the slurry attached to the foamed aluminum electrode sheet, thereby controlling the thickness and uniformity of the foamed aluminum electrode sheet.

Hereinbefore, specific embodiments of the present application are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are intended to be within the scope of the present application.

Claims (9)

1. A foamed aluminum pole piece coating equipment is used for coating active substances on a foamed aluminum pole piece, and is characterized by comprising the following components:

the slurry tank comprises a squeezing roller, the slurry tank is provided with a first cavity, the squeezing roller is arranged in the first cavity containing the slurry, the squeezing roller comprises a roller and a blade connected with the roller, the blade is formed by protruding and extending towards the outer side of the roller, and the squeezing roller is used for enabling the blade to guide the slurry to the foamed aluminum pole piece through rotation;

the scraping plate mechanism comprises a first scraping plate and a second scraping plate which are arranged at intervals, wherein comb-shaped tooth structures are arranged on the first scraping plate and the second scraping plate respectively and are used for scraping partial slurry on the surface of the foamed aluminum; and

the driving mechanism is arranged on one side, away from the slurry pool, of the scraping plate mechanism and used for driving the foamed aluminum pole piece to move relative to the scraping plate mechanism and the slurry pool, the driving mechanism comprises a first driving unit and a mechanical arm connected with the first driving unit in a transmission mode, and the mechanical arm is used for clamping the foamed aluminum pole piece.

2. The apparatus for coating an aluminum foam pole piece according to claim 1, wherein the squeeze rollers comprise a first squeeze roller and a second squeeze roller, and the first squeeze roller and the second squeeze roller are spaced apart from each other on two sides of a wetting path of the aluminum foam pole piece.

3. The apparatus of claim 2, wherein the number of the vanes is plural, a plurality of the vanes are spaced around the surface of the roller, and the height of each of the vanes is greater than 6 mm.

4. The aluminum foam pole piece coating equipment as claimed in claim 1, wherein the first scraper and the second scraper are spaced at two sides of the moving path of the aluminum foam pole piece, the comb-shaped tooth structure comprises a first comb-shaped tooth and a second comb-shaped tooth, the first comb-shaped tooth is arranged at a first end of the first scraper facing the second scraper, and the second comb-shaped tooth is arranged at a second end of the second scraper facing the first scraper.

5. The aluminum foam pole piece coating apparatus of claim 4, wherein the scraper mechanism further comprises a fine adjustment unit, the fine adjustment unit is in transmission connection with the comb-shaped tooth structure for adjusting the protruding amount of the comb-shaped tooth structure towards the aluminum foam pole piece.

6. The apparatus for coating foamed aluminum pole pieces according to claim 1, wherein the scraper mechanism is formed with a through hole at a side of a moving path of the foamed aluminum pole piece, the through hole being used for the driving mechanism to pass through the scraper mechanism.

7. The apparatus of claim 1, wherein the slurry tank further comprises a first housing and a second housing, the first housing enclosing the first cavity, the second housing being disposed outside the first housing and enclosing the first housing to form a second cavity, the first cavity being spaced apart from the second cavity.

8. The apparatus of claim 7, wherein the slurry tank further comprises a first feed tube and a first discharge tube, the first feed tube and the first discharge tube passing through the first housing and the second housing and communicating with the first chamber, the slurry tank further comprises a second feed tube and a second discharge tube, the second feed tube and the second discharge tube passing through the second housing and communicating with the second chamber.

9. A pole piece manufacturing method, characterized in that the foamed aluminum pole piece coating equipment of any one of claims 1 to 8 is used, and comprises the following steps:

fixing the foamed aluminum pole piece on the driving mechanism, and enabling the driving mechanism to drive the foamed aluminum pole piece to be immersed into the first cavity of the slurry tank along a first direction;

the first scraper and the second scraper move towards the foamed aluminum pole piece and position the foamed aluminum pole piece;

the driving mechanism drives the foamed aluminum pole piece to reversely leave the first cavity along the first direction, and meanwhile, a tangent line of a point close to the foamed aluminum pole piece faces the first direction when the extrusion roller rotates so as to push the slurry to the foamed aluminum pole piece; and

the driving mechanism further drives the foamed aluminum pole piece to leave the first cavity along the reverse direction of the first direction, so that the comb-shaped tooth structure scrapes off at least part of slurry attached to the foamed aluminum pole piece.

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