WO2019080318A1 - 新型双面涂布方法及装置 - Google Patents

新型双面涂布方法及装置

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Publication number
WO2019080318A1
WO2019080318A1 PCT/CN2017/116688 CN2017116688W WO2019080318A1 WO 2019080318 A1 WO2019080318 A1 WO 2019080318A1 CN 2017116688 W CN2017116688 W CN 2017116688W WO 2019080318 A1 WO2019080318 A1 WO 2019080318A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
reverse
strip
coating die
tape
Prior art date
Application number
PCT/CN2017/116688
Other languages
English (en)
French (fr)
Inventor
杨志明
Original Assignee
深圳市信宇人科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市信宇人科技股份有限公司 filed Critical 深圳市信宇人科技股份有限公司
Publication of WO2019080318A1 publication Critical patent/WO2019080318A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00—Means for manipulating or holding work, e.g. for separate articles
    • B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a novel double-sided coating method and device, in particular to a novel double-sided coating method and device suitable for electrode coating of lithium batteries.
  • the so-called front coating means The coating on the upper bottom surface of the substrate to be coated refers to coating on the lower bottom surface of the substrate to be coated.
  • the upper bottom surface and the lower bottom surface of the coated substrate are distinguished such that when the coated substrate enters the oven, the surface on the upper surface of the coated substrate is the upper bottom surface, and the surface on the lower surface of the coated substrate is the lower bottom surface.
  • the front side coating is performed first, and then the reverse side coating is performed, and the front side coating is performed first, and then the reverse side coating is performed.
  • the double-sided coating device is generally divided into two types, one of which is a back coating roller when the reverse coating is applied, as disclosed in the Chinese patent document CN102632017, which is a double-sided coating device, which is first coated on the front side.
  • the strip passes through the press-fit of the front coating head and the front coated back roll, and the front coating head projects the lithium battery material horizontally to the right.
  • the reverse coating is performed, and the reverse coating head is vertically disposed, and the tape passes through the pressing portion of the reverse coating head and the reverse coated back roller, and the reverse coating head vertically emits the lithium battery material;
  • the method of coating the back roll for double-sided coating has the following defects: 1.
  • the bubble will be caught between the heads, which seriously affects the coating quality.
  • the thickness of the battery material coated on the surface of the strip is uneven, the weight is uneven, and the coating precision is not high. 2.
  • the smoothness of the surface of the strip is limited. There are some fine particles on the surface of the strip.
  • the surface of the strip is not flat.
  • the die is rigidly abutted, and when the lip of the coating die hits the fine particles on the surface of the strip, the strip will be scratched, and a large hole or a large mouth is often scraped off in the strip, and even a broken strip occurs.
  • the production efficiency is not high, and the yield of the products produced is also low. 3, only zebra coating, can not achieve continuous coating of the full roll surface.
  • the other is a double-sided coating that does not require a reverse-coated back roll, such as a lithium battery material double-coated machine disclosed in Chinese Patent Publication No. 1010284284, which divides the strip in the forward direction of the strip into a front coating.
  • the tape body and the reverse coating tape body, the front coating tape body is maintained in the first inclined state, and the reverse coating tape body is maintained in the second inclined state;
  • the front coating die is disposed on the front side of the front coating tape body
  • the reverse coating die is disposed between the front coating die and the drying box, the reverse coating die is located below the reverse coating strip, and the end of the reverse coating die is inclined to the top coating tape On the back side of the body; the reverse coating die lifts the reverse coating strip up when the battery material is applied.
  • a double-sided coater as disclosed in Chinese Patent Publication No. CN104014461 is also a similar structure.
  • the double-sided coater is a support member that supports the reverse coating die as both the reverse coating tape and the coating material for coating the lithium battery material on the reverse coating tape.
  • the cloth has the following defects: 1.
  • This coating method relies on the coating die to feed the tape upwards, so the tension of the tape is ten important. If the tension of the tape is insufficient, the tape will be coated. The surface of the die is detached, causing the electrode material to not be applied; if the tension is too tight, if there are some fine particles on the surface of the tape, the lip of the coating die hits the surface of the tape during the tape removal process.
  • Fine particles will scratch the material belt, often scraping a large hole or large mouth in the material belt, and even the phenomenon of broken belt, the production efficiency is not high, and the yield of the produced product is also low, because this
  • the coating method requires strict tension on the material belt. In the actual coating process, the tension of the material belt is affected by various factors, and when it is loaded, it will also be loose and tight, so it will still Causes uneven coating thickness and weight, or problems with holes in the tape;
  • the front side coating is performed first, followed by the reverse side coating.
  • This method of first coating the front side and then applying the reverse side has the following problems: First, the reverse side coating is performed before the tape enters the oven, and the tape is shaken by the gas in the air floating oven, and the tape is shaken. The accuracy of the thickness of the reverse coating is affected. Second, the existing reverse coating is to place the reverse coating head under the strip. Here, the coating pressure control of the reverse coating head is very high, if the reverse coating is applied.
  • the coating pressure of the head is too small, the electrode material cannot be well coated onto the tape, and the problem of leakage coating may occur; if the coating pressure of the reverse coating head is too large, the problem of thick coating thickness may occur; If the leakage of the excess electrode material occurs under the action of gravity, it will flow down the outer wall of the coating head, causing waste of the electrode material and environmental pollution.
  • the present invention provides a novel double-sided coating method and apparatus which does not cause leakage coating, does not cause the electrode material to flow down the outer wall of the reverse coating head, and has uneven coating thickness.
  • the technical proposal of the present invention is to provide a novel double-sided coating method, comprising:
  • the front coating die and the reverse coating die are disposed on the feeding port side of the drying box;
  • At least one tension roller is disposed, and the tension roller is in contact with the front surface of the strip, at least for changing the advancing direction of the strip, and is divided into a reverse coating area and a front coating area along the advancing direction of the strip;
  • the reverse coating die is disposed in the reverse coating area; the electrode material is first coated on the reverse side of the tape by the reverse coating die;
  • the front coating die is disposed between the reverse coating die and the drying box, and the electrode material is coated on the front surface of the tape by the front coating die.
  • a drying device for drying the electrode material coated by the reverse coating die is provided in the vicinity of the reverse coating region after the reverse coating die.
  • the tension rolls are two, one of which is in contact with the reverse side of the tape, and the tension roller which is in contact with the reverse side of the tape is located in front of the tension roller which is in contact with the front side of the tape.
  • the reverse side of the strip between the two tensioning rolls is the reverse coated area.
  • the tension rolls are two, and both of the tension rolls are in contact with the front side of the strip.
  • the reverse side of the strip between the two tensioning rolls is the reverse coated area.
  • the angle between the strip and the point of the tension roll is selected between 0 and 90 degrees.
  • the invention also provides a novel double-sided coating device comprising a front coating die and a reverse coating die, wherein the front coating die and the reverse coating die are located on the feeding port side of the drying box, at least one a tension roller, the tension roller is in contact with the front surface of the tape for changing the advancing direction of the tape, and is divided into a reverse coating region and a front coating region along the advancing direction of the tape; the reverse coating die setting Any position in the reverse coating area; and the electrode material is first coated on the reverse side of the strip by the reverse coating die; the front coating die is placed between the reverse coating die and the drying box, The electrode material is then applied to the front side of the tape by a front side coating die.
  • a drying device for drying the electrode material coated by the reverse coating die is provided in the vicinity of the reverse coating region after the reverse coating die.
  • the tension rolls are two, one of which is in contact with the reverse side of the tape, and the tension roller which is in contact with the reverse side of the tape is located in front of the tension roller which is in contact with the front side of the tape.
  • the reverse side of the strip between the two tensioning rolls is the reverse coated area.
  • the tension rolls are two, and both of the tension rolls are in contact with the front side of the strip.
  • the reverse side of the strip between the two tensioning rolls is the reverse coated area.
  • the angle between the strip and the point of the tension roll is selected between 0 and 90 degrees.
  • the invention has the advantages that no leakage coating occurs, and the electrode material does not flow down the outer wall of the coating head and the coating thickness is uniform.
  • Figure 1 is a block diagram showing an embodiment of the method of the present invention.
  • Figure 2 is a schematic view showing the structure of a first embodiment of the apparatus of the present invention.
  • Figure 3 is a schematic view showing the structure of a second embodiment of the apparatus of the present invention.
  • Figure 4 is a schematic view showing the structure of a third embodiment of the apparatus of the present invention.
  • Figure 5 is a schematic view showing the structure of a fourth embodiment of the apparatus of the present invention.
  • Figure 6 is a schematic view showing the structure of a fifth embodiment of the apparatus of the present invention.
  • Figure 7 is a schematic view showing the structure of a sixth embodiment of the apparatus of the present invention.
  • Figure 8 is a schematic view showing the structure of a seventh embodiment of the apparatus of the present invention.
  • Figure 9 is a schematic view showing the structure of an eighth embodiment of the apparatus of the present invention.
  • Figure 10 is a schematic view showing the structure of a ninth embodiment of the apparatus of the present invention.
  • Figure 11 is a schematic view showing the structure of a tenth embodiment of the apparatus of the present invention.
  • Figure 12 is a schematic view showing the structure of an eleventh embodiment of the apparatus of the present invention.
  • Figure 13 is a schematic view showing the structure of a twelfth embodiment of the apparatus of the present invention.
  • Figure 14 is a schematic view showing the structure of a thirteenth embodiment of the apparatus of the present invention.
  • Figure 15 is a schematic view showing the structure of a fourteenth embodiment of the apparatus of the present invention.
  • Figure 16 is a schematic view showing the structure of a fifteenth embodiment of the apparatus of the present invention.
  • Figure 17 is a schematic view showing the structure of a sixteenth embodiment of the apparatus of the present invention.
  • connection is to be understood broadly, and may be either a fixed connection or a disassembly connection, unless otherwise explicitly stated and defined. , or integrally connected; may be mechanical connection, or may be electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication between the two components.
  • connection or integrally connected; may be mechanical connection, or may be electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication between the two components.
  • the front side of the strip 8 in the present invention refers to which side of the strip 8 is in the upward direction before the strip 8 enters the drying box, and the reverse side means that the front side refers to the strip 8 entering the baking.
  • FIG. 1 discloses a novel double-side coating method.
  • the reference numerals in the invention of the present invention can be referred to the following reference numerals, and the meanings are the same, including:
  • the front coating die 1 and the reverse coating die 2 are disposed on the feeding port side of the drying box 3; that is, on the same side of the drying box 3, double-sided coating, drying here Box 3 can only use air-floating drying box 3;
  • At least one tension roller 4 is provided, and the tension roller 4 is in contact with the front surface of the strip 8, at least for changing the advancing direction of the strip 8.
  • the tension roller 4 can also be used to maintain the predetermined tension of the strip 8, and along the The advancing direction of the strip 8 is divided into a reverse coating area 6 and a front coating area 5; when a tension roller 4 is provided, such as a tension roller and a discharge roller, which constitute a change of the front direction of the strip 8,
  • the reverse coating area 6 is the portion 61 where the tape 8 is in contact with the tension roller 4, and the portion 61 of the tape 8 in contact with the tension roller 4 is near the front portion 62 of the tension roller 4 and/or close to the tension.
  • the rear portion 63 of the roller 4 is added up to be the reverse coating area 6; the front coating area 5 is located between the tension roller 4 and the drying box 3, in order to reduce the jitter of the tape 8 when entering the drying box 3.
  • the effect of the front coating die 1 is such that a stabilizing roller 11 is provided between the front coating die 1 and the tension roller 4, and the stabilizing roller 11 is in contact with the front surface of the tape 8.
  • the reverse coating die 2 is disposed in the reverse coating area 6; the electrode material is first coated on the reverse surface of the tape 8 by the reverse coating die 2; generally, the traveling direction of the tape 8 is Advancing from top to bottom, and then changing the direction of the strip 8 by the tension roller 4, so that most of the reverse coating area 6 of the strip 8 is applied upward or outward when coated, which is advantageous for the reverse side.
  • the reverse coating die 2 may be disposed downward toward the reverse coating region 6, or horizontally toward the reverse coating region 6, and the two settings are optimal; of course, the reverse surface may also be used.
  • the coating die 2 can be disposed upward in the vicinity of the tension roller 4 toward the reverse coating region 6, in which case, although the coating effect is not as good as the first two modes, the tape 8 does not vibrate due to the presence of the tension roller 4. Only need to control the coating pressure, it can also achieve the ideal reverse coating effect; overcome the problem of leakage coating or the downstream flow of the electrode material along the reverse coating head during the traditional reverse coating process, resulting in waste and pollution. .
  • the front coating die 1 is disposed between the reverse coating die 2 and the drying box 3, and the electrode material is coated on the front surface of the tape 8 by the front coating die 1;
  • the end of the head 1 may be suspended above the strip 8 to form a curtain coating; or the end of the front coating die 1 may be placed in contact with the strip 8, regardless of the front coating die 1
  • the end is suspended above the strip 8, or the end of the front coating die 1 is placed in contact with the strip 8, even if the strip 8 is shaken before entering the drying box 3, it does not affect the coating.
  • the uniformity of the thickness of the cloth is disposed between the reverse coating die 2 and the drying box 3, and the electrode material is coated on the front surface of the tape 8 by the front coating die 1;
  • the end of the head 1 may be suspended above the strip 8 to form a curtain coating; or the end of the front coating die 1 may be placed in contact with the strip 8, regardless of the front coating die 1
  • the end is suspended above the strip 8, or the end of the front coating die 1 is placed in contact with the
  • a drying device 7 for drying the electrode material coated by the reverse coating die 2 is provided in the vicinity of the reverse coating region 6 after the reverse coating die 2, and the drying device 7 can be quickly placed
  • the electrode material coated on the reverse coating die 2 is dried to prevent it from flowing under the influence of gravity, which affects the uniformity of the coating thickness.
  • the tension roller 4 may be two, one of which is in contact with the reverse side of the strip 8, and the tension roller that is in reverse contact with the strip 8 is located in front of the tension roller in contact with the front side of the strip 8; thus, it can be expanded
  • the range of the reverse coated area 6, that is, the opposite side of the strip 8 between the two tension rolls 4, may be the reverse coated area 6.
  • the tension roller 4 may be two, and both of the tension rollers 4 are in contact with the front surface of the strip 8, and similarly, the range of the reverse coating area 6 may also be expanded. That is to say, the reverse side of the strip 8 between the two tension rolls 4 is the reverse coated area 6.
  • the angle between the strip 8 and the tension roller 4 is selected between 0 and 90 degrees, that is, the strip 8 may be vertical with respect to the tension roller 4.
  • the straight setting may be set horizontally with respect to the tension roller 4, or may be any acute angle setting between 0-90 degrees with respect to the tension roller 4.
  • FIG. 2 shows a first embodiment of the novel double-side coating apparatus of the present invention, comprising a front coating die 1 and a reverse coating die 2, a front coating die 1 and a reverse side.
  • the coating die 2 is located on the feed port side of the drying box 3, at least one tension roller 4, and the tension roller 4 is in contact with the front surface of the tape 8 for changing the advancing direction of the tape 8 and for holding the material.
  • the predetermined tension of the belt 8 is divided into a reverse coating area 6 and a front coating area 5 along the advancing direction of the belt 8; the reverse coating die 2 is disposed in the reverse coating area 6, and is in the belt 8 is adjacent to the front portion 62 of the tension roller 4 in contact with the tension roller 4; and the electrode material is first coated on the reverse side of the tape 8 by the reverse coating die 2; the front side is coated with the die 1 Between the reverse coating die 2 and the drying box 3, the electrode material is coated on the front side of the strip 8 by the front coating die 1; the strip 8 is oriented vertically. The angle between the strip 8 and the tension roller 4 is 90 degrees, and the reverse coating die 2 is horizontally applied to the strip 8 from the horizontal direction.
  • the invention adopts the reverse side of the coating strip 8 first, and applies the coating in the relatively stable region of the vicinity of the strip 8 which is in contact with or in contact with the tension roller 4, so that the conventional reverse coating can be avoided.
  • the strip 8 is shaken, and the electrode material flows down along the outer wall of the coating head and the coating thickness is uneven.
  • the problem is that the front coating die 1 is disposed between the reverse coating die 2 and the drying box 3, and the front coating die 1 is positioned above the front surface of the tape 8, suspended or lightly contacted with respect to the tape 8, Even if the tape 8 is slightly shaken, it does not cause a problem of leakage coating of the electrode material on the front side and uneven coating thickness.
  • a drying device 7 for drying the electrode material coated by the reverse coating die 2 is provided in the vicinity of the reverse coating region 6 after the reverse coating die 2, the drying The device 7 can be a one-piece drying device or a separate drying device.
  • the drying temperature of the drying device 7 can be selected between 80-180 degrees Celsius.
  • a stabilizing roller 11 may be disposed between the front coating die 1 and the tension roller 4, The stabilizing roller 11 is in contact with the front side of the strip 8.
  • FIG. 3 shows a second embodiment of the novel double-side coating apparatus of the present invention, comprising a front coating die 1 and a reverse coating die 2, a front coating die 1 and a reverse side.
  • the coating die 2 is located on the feed port side of the drying box 3, at least one tension roller 4, and the tension roller 4 is in contact with the front surface of the tape 8 for changing the advancing direction of the tape 8 and for holding the material.
  • the predetermined tension of the belt 8 is divided into a reverse coating area 6 and a front coating area 5 along the advancing direction of the belt 8; the reverse coating die 2 is disposed in the reverse coating area 6, and is in the belt 8 is on the portion 61 in contact with the tension roller 4; and the electrode material is first coated on the reverse side of the tape 8 by the reverse coating die 2; the front coating die 1 is placed on the reverse coating die 2 Between the drying boxes 3, the electrode material is coated on the front side of the strip 8 by the front coating die 1; the strip 8 runs in a vertical direction, and the strip 8 and the tension roller 4 The angle between the two is 90 degrees, and the reverse coating die 2 is horizontally disposed, and is applied to the tape 8 from the horizontal direction.
  • the invention adopts the reverse side of the coating strip 8 first, and applies the coating in the relatively stable region of the vicinity of the strip 8 which is in contact with or in contact with the tension roller 4, so that the conventional reverse coating can be avoided.
  • the strip 8 is shaken, and the electrode material flows down along the outer wall of the coating head and the coating thickness is uneven.
  • the problem is that the front coating die 1 is disposed between the reverse coating die 2 and the drying box 3, and the front coating die 1 is positioned above the front surface of the tape 8, suspended or lightly contacted with respect to the tape 8, Even if the tape 8 is slightly shaken, it does not cause a problem of leakage coating of the electrode material on the front side and uneven coating thickness.
  • a drying device 7 for drying the electrode material coated by the reverse coating die 2 is provided in the vicinity of the reverse coating region 6 after the reverse coating die 2, the drying The device 7 can be a one-piece drying device or a separate drying device.
  • the drying temperature of the drying device 7 can be selected between 80-180 degrees Celsius.
  • a stabilizing roller 11 may be disposed between the front coating die 1 and the tension roller 4, The stabilizing roller 11 is in contact with the front side of the strip 8.
  • FIG. 4 shows a third embodiment of the novel double-side coating apparatus of the present invention, comprising a front coating die 1 and a reverse coating die 2, a front coating die 1 and a reverse side.
  • the coating die 2 is located on the feed port side of the drying box 3, at least one tension roller 4, and the tension roller 4 is in contact with the front surface of the tape 8 for changing the advancing direction of the tape 8 and for holding the material.
  • the predetermined tension of the belt 8 is divided into a reverse coating area 6 and a front coating area 5 along the advancing direction of the belt 8; the reverse coating die 2 is disposed in the reverse coating area 6, and is in the belt 8 is on the portion 61 in contact with the tension roller 4; and the electrode material is first coated on the reverse side of the tape 8 by the reverse coating die 2; the front coating die 1 is placed on the reverse coating die 2 Between the drying boxes 3, the electrode material is coated on the front side of the strip 8 by the front coating die 1; the strip 8 is oriented obliquely from top to bottom at an acute angle, the material The angle between the belt 8 and the tension roller 4 is an acute angle, and the reverse coating die 2 is horizontally disposed, and is applied from the horizontal direction to the tape 8; obviously, the reverse coating The die 2 can be positioned vertically aligned strip 8 before the oblique feed tension roller 4 with 8 to set an arbitrary position (see FIG.
  • the invention adopts the reverse side of the coating strip 8 first, and applies the coating in the relatively stable region of the vicinity of the strip 8 which is in contact with or in contact with the tension roller 4, so that the conventional reverse coating can be avoided.
  • the leakage of the strip 8 and the electrode material flow down the outer wall of the coating head and the coating thickness is uneven due to the shaking of the strip 8
  • the problem is that the front coating die 1 is disposed between the reverse coating die 2 and the drying box 3, and the front coating die 1 is positioned above the front side of the tape 8 and suspended or lightly contacted with respect to the tape 8 Even if the tape 8 is slightly shaken, it does not cause a problem of leakage coating of the electrode material on the front side and uneven coating thickness.
  • a drying device 7 for drying the electrode material coated by the reverse coating die 2 is provided in the vicinity of the reverse coating region 6 after the reverse coating die 2, the drying The device 7 can be a one-piece drying device or a separate drying device.
  • the drying temperature of the drying device 7 can be selected between 80-180 degrees Celsius (the drying device 7 is not shown in the drawing).
  • a stabilizing roller 11 may be disposed between the front coating die 1 and the tension roller 4, The stabilizing roller 11 is in contact with the front side of the strip 8.
  • FIG. 5 shows a fourth embodiment of the novel double-side coating apparatus of the present invention, comprising a front coating die 1 and a reverse coating die 2, a front coating die 1 and a reverse side.
  • the coating die 2 is located on the feed port side of the drying box 3, at least one tension roller 4, and the tension roller 4 is in contact with the front surface of the tape 8 for changing the advancing direction of the tape 8 and for holding the material.
  • the predetermined tension of the belt 8 is divided into a reverse coating area 6 and a front coating area 5 along the advancing direction of the belt 8; the reverse coating die 2 is disposed in the reverse coating area 6, and is in the belt 8 is adjacent to the rear portion 63 of the tension roller 4 in contact with the tension roller 4; and the electrode material is first coated on the reverse side of the tape 8 by the reverse coating die 2; the front side is coated with the die 1 Between the reverse coating die 2 and the drying box 3, the electrode material is applied to the front surface of the tape 8 by the front coating die 1; the tape 8 is oriented at an acute angle. The angle between the strip 8 and the tension roller 4 is an acute angle, and the reverse coating die 2 is vertically disposed below the strip 8, from the bottom to the top.
  • the belt 8 is coated; in this state, although the reverse coating effect of the above embodiment is not good, since the reverse coating area 6 is treated near the back of the tension roller 4, the belt 8 is relatively stable when traveling, and only needs to be controlled.
  • the coating pressure can still be better than that of the conventional reverse coating method.
  • the present invention places the front coating die 1 between the reverse coating die 2 and the drying box 3, and the front coating die 1 is positioned above the front side of the tape 8, suspended or lightly contacted with respect to the tape 8, Even if the tape 8 is slightly shaken, it does not cause a problem of leakage coating of the electrode material on the front side and uneven coating thickness.
  • a drying device 7 for drying the electrode material coated by the reverse coating die 2 is provided in the vicinity of the reverse coating region 6 after the reverse coating die 2, the drying The device 7 can be a one-piece drying device or a separate drying device.
  • the drying temperature of the drying device 7 can be selected between 80-180 degrees Celsius (the drying device 7 is not shown in the drawing).
  • a stabilizing roller 11 may be disposed between the front coating die 1 and the tension roller 4, The stabilizing roller 11 is in contact with the front side of the strip 8.
  • FIG. 6 shows a fifth embodiment of the novel double-side coating apparatus of the present invention, comprising a front coating die 1 and a reverse coating die 2, a front coating die 1 and a reverse side.
  • the coating die 2 is located on the feed port side of the drying box 3, at least one tension roller 4, and the tension roller 4 is in contact with the front surface of the tape 8 for changing the advancing direction of the tape 8 and for holding the material.
  • the predetermined tension of the belt 8 is divided into a reverse coating area 6 and a front coating area 5 along the advancing direction of the belt 8; the reverse coating die 2 is disposed in the reverse coating area 6, and is in the belt 8 on the front portion 62 of the portion 61 in contact with the tension roller 4, and the tape of the front portion 62 is horizontally disposed, the reverse coating die 2 being vertically disposed above the front portion 62 Or the end of the reverse coating die 2 is in contact with the strip 8; and the electrode material is first coated on the reverse side of the strip 8 by the reverse coating die 2; the front coating die 1 is placed on the reverse side Between the coating die 2 and the drying box 3, the electrode material is coated on the front side of the tape 8 by the front coating die 1; In the oblique direction which is an acute angle, the angle between the strip 8 and the tension roller 4 is an acute angle, and the reverse coating die 2 is horizontally disposed, and is coated from the horizontal direction to the strip 8;
  • the reverse coating die 2 can also be arranged vertically aligned with
  • the invention adopts the reverse side of the coating strip 8 first, so that the conventional reverse coating die can be prevented from being disposed under the strip 8 near the inlet of the drying box, because the strip 8 is shaken, and the strip
  • the coating die 1 is located above the front side of the tape 8 and is suspended or lightly contacted with respect to the tape 8 so that even if the tape 8 is slightly shaken, the electrode material on the front side is not leaked and the coating thickness is uneven. The problem.
  • a drying device 7 for drying the electrode material coated by the reverse coating die 2 is provided in the vicinity of the reverse coating region 6 after the reverse coating die 2, the drying The device 7 can be a one-piece drying device or a separate drying device.
  • the drying temperature of the drying device 7 can be selected between 80-180 degrees Celsius (the drying device 7 is not shown in the drawing).
  • a stabilizing roller 11 may be disposed between the front coating die 1 and the tension roller 4, The stabilizing roller 11 is in contact with the front side of the strip 8.
  • FIG. 7 shows a sixth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 7 is basically the same as the embodiment shown in FIG. 3, except that the tension is the same.
  • FIG. 8 shows a seventh embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 8 is basically the same as the embodiment shown in FIG. 4, except that the tension is the same.
  • FIG. 9 shows an eighth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 9 is basically the same as the embodiment shown in FIG. 8, and the difference is the reverse coating.
  • the die 2 is disposed at an oblique angle with respect to the obliquely downward direction of the tension roller 4, which is more advantageous for the outflow of the electrode material; in the embodiment shown in Fig. 9, the tension roller 4 is two, one of which is associated with the strip 8 In the reverse contact, the tension roller in contact with the reverse side of the tape 8 is located in front of the tension roller in contact with the front surface of the tape 8, and a discharge roller 10 is provided in front of the first roller 9 for discharging the tape 8.
  • FIG. 10 shows a ninth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 10 is basically the same as the embodiment shown in FIG. 9, except that the reverse coating is performed.
  • the die 2 is disposed at an oblique angle with respect to the obliquely downward direction of the tension roller 4, which is more advantageous for the outflow of the electrode material; in the embodiment shown in Fig. 10, the tension roller 4 is two, one of which is associated with the strip 8 In the reverse contact, the tension roller in contact with the reverse side of the tape 8 is located in front of the tension roller in contact with the front surface of the tape 8, and a discharge roller 10 is provided in front of the first roller 9 for discharging the tape 8.
  • FIG. 11 shows a tenth embodiment of the novel double-sided coating apparatus of the present invention, and the embodiment shown in FIG. 11 is basically the same as the embodiment shown in FIG. 9, except that the material is different.
  • the angle between the belt 8 and the tension roller 4 is smaller, and the plurality of over rollers 9 constitute a tape passage.
  • the reverse coating die 2 is disposed at an oblique angle with respect to the obliquely downward direction of the tension roller 4, which is more advantageous for the outflow of the electrode material; in the embodiment shown in Fig. 11, the tension roller 4 is two.
  • the tension roller in contact with the reverse side of the strip 8 is located in front of the tension roller in contact with the front side of the strip 8, and a unwinding roller 10 is provided in front of the first overroll 9 for Release the strip 8.
  • FIG. 12 shows an eleventh embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 12 is basically the same as the embodiment shown in FIG. 11, and the difference is that the reverse coating is applied.
  • the cloth die 2 is located in the reverse coated area between the two tension rolls 4, which is more advantageous for the on-site placement of the reverse coating die.
  • the angle between the strip 8 and the tension roller 4 is smaller, and the plurality of over rollers 9 constitute a tape passage.
  • FIG. 12 shows an eleventh embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 12 is basically the same as the embodiment shown in FIG. 11, and the difference is that the reverse coating is applied.
  • the cloth die 2 is located in the reverse coated area between the two tension rolls 4, which is more advantageous for the on-site placement of the reverse coating die.
  • the angle between the strip 8 and the tension roller 4 is smaller, and the plurality of over rollers 9 constitute a tape passage.
  • the tension rollers 4 are two, one of which is in contact with the reverse side of the strip 8, and the tension roller that is in reverse contact with the strip 8 is located in front of the tension roller that is in front of the strip 8; And a take-up roll 10 is provided in front of the first over roll 9 for discharging the strip 8.
  • FIG. 13 shows a twelfth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 13 is basically the same as the embodiment shown in FIG. 12, and the difference is two.
  • the strip between the tension rolls 4 is in a horizontal state, and the reverse coating die 2 is located in the reverse coated area between the two tension rolls 4, and is vertically arranged, so that the reverse coating effect can be better achieved.
  • the angle between the strip 8 and the tension roller 4 is smaller, and the plurality of over rollers 9 constitute a tape passage.
  • the tension rollers 4 are two, one of which is in contact with the reverse side of the strip 8, and the tension roller which is in reverse contact with the strip 8 is located in front of the tension roller which is in contact with the front side of the strip 8; And a take-up roll 10 is provided in front of the first over roll 9 for discharging the strip 8.
  • FIG. 14 shows a thirteenth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 14 is basically the same as the embodiment shown in FIG. 7, except that the elimination is omitted.
  • the intermediate roller 9 is two, the tension roller 4 is two, and the two tension rollers 4 are in contact with the front surface of the strip 8; the reverse side of the strip 8 between the two tension rollers 4 is reverse coated.
  • the tape 8 in this embodiment is vertically disposed.
  • FIG. 15 shows a fourteenth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 15 is basically the same as the embodiment shown in FIG. 8 is disposed obliquely; in the present embodiment, the intermediate roller 9 is omitted, the tension roller 4 is two, and the two tension rollers 4 are in contact with the front surface of the tape 8; The reverse side of the strip 8 between the tension rolls 4 is the reverse coated area 6.
  • the tape 8 in this embodiment is vertically disposed.
  • FIG. 16 shows a fifteenth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 16 is basically the same as the embodiment shown in FIG. 15, and the difference is that the reverse coating is applied.
  • the cloth die 2 is located on one side of the obliquely disposed strip 8; in the present embodiment, the intermediate roller 9 is omitted, the tension roller 4 is two, and the two tension rollers 4 are both taped.
  • the front side of the strip 8 is the reverse side coated area 6 on the opposite side of the strip 8 between the two tension rolls 4.
  • the tape 8 in this embodiment is vertically disposed.
  • FIG. 17 shows a sixteenth embodiment of the novel double-sided coating apparatus of the present invention.
  • the embodiment shown in FIG. 17 is basically the same as the embodiment shown in FIG. 16, and the difference is that the reverse coating is applied.
  • the cloth die 2 is located near the reverse coating area of the rear portion 63 of the tension roller 4, and is disposed obliquely upward with the tape 8 at an acute angle; obviously, the reverse coating die 2 can also be disposed perpendicular to the tape 8;
  • the intermediate roller 9 is omitted, the tension roller 4 is two, and the two tension rollers 4 are in contact with the front surface of the tape 8; the tape 8 between the two tension rollers 4
  • the reverse side is the reverse coated area 6.
  • the tape 8 in this embodiment is vertically disposed.

Abstract

一种双面涂布方法及装置，其中装置包括正面涂布模头（1）和反面涂布模头（2），所述正面涂布模头（1）和反面涂布模头（2）位于烘干箱（3）的进料口一侧，还包括至少一个张力辊（4），所述张力辊（4）与料带的正面接触，用于改变料带的前进方向，且沿料带的前进方向分为正面涂布区域（5）和反面涂布区域（6），所述反面涂布模头（2）设置在反面涂布区域（6）内的任意位置。涂布时，所述反面涂布模头（2）先将电极材料涂布在料带的反面上，再由所述正面涂布模头（1）将电极材料涂布在料带的正面上。所述双面涂布方法及装置具有不会产生漏涂、防止电极材料下流以及确保涂布厚度均匀的优点。

Description

新型双面涂布方法及装置
技术领域
　　本发明涉及一种新型双面涂布方法及装置，尤其是一种适合于锂电池电极涂布的新型双面涂布方法及装置。
背景技术
　　现有的双面涂布有多种方式，其中一种方式是在烘干箱的同一侧设置两个涂布头，即一个正面涂布头和一个反面涂布头，所谓正面涂布是指在被涂布基材的上底面的涂布，所谓反面涂布是指在被涂布基材的下底面上的涂布。涂布基材的上底面和下底面的区分，是以涂布基材在进入烤箱时，位于涂布基材上面的面为上底面，位于涂布基材下面的面为下底面。现有的同侧设置两个把涂布头的双面涂布机，都是先进行正面涂布，后进行反面涂布的方式，而对这种先进行正面涂布，后进行反面涂布的双面涂布装置，大体上又分为两类，一种是反面涂时需要背涂辊的，如中国专利文献CN102632017所公开的名称为双面涂布装置，它是先进行正面涂布，料带从正面涂布头和正面涂布背辊的压合处通过，正面涂布头水平向右射出锂电池材料。完成正面涂布后再进行反面涂布，反面涂布头垂直设置，料带从反面涂布头和反面涂布背辊的压合处通过，反面涂布头垂直向上射出锂电池材料；然后再进入烘干箱进行双面烘干,经过烘干箱烘干出来后收料；这种需要涂布背辊的来进行双面涂布的方式存在以下缺陷：1、在料带与涂布模头之间会卷入汽泡，严重影响涂布质量，涂布在料带表面的电池材料厚薄不均，重量不均，涂布精度不高。2、料带的表面的光滑度是有限的，料带表面存在一些细小颗粒，料带的表面并不平整，在料带走带过程中，料带的两面分别由涂布背辊和涂布模头刚性抵顶,涂布模头的唇嘴一碰到料带表面的细小颗粒，就会刮破料带，经常会在料带刮出一个大孔或大口，甚至出现断带的现象，生产效率不高,生产出来的产品的良品率也偏低。3、只能进行斑马涂布，不能实现全辊面连续涂布。
　　另一种是不需要反面涂布背辊的双面涂布，如中国专利文献CN104028423公开的一种锂电池材料双面涂布机，它是将沿料带的前进方向料带区分为正面涂布带体和反面涂布带体，正面涂布带体保持在第一倾斜状态，反面涂布带体保持在第二倾斜状态；正面涂布模头设置在正面涂布带体的正面一侧；反面涂布模头设置在正面涂布模头与烘干箱之间，反面涂布模头位于反面涂布带体的下方，反面涂布模头的端部倾斜抵顶于反面涂布带体的背面上；在涂布电池材料时反面涂布模头将反面涂布带体向上撑起。再如中国专利文献CN104014461所公开的双面涂布机也是类似结构。这类双面涂布机是把反面涂布模头既当反面涂布带体向上撑起的支撑件，又是向反面涂布带体涂布锂电池材料的涂布件，这种反面涂布存在如下缺陷，1、这种涂布方式是靠涂布模头向上来料带的，那么料带的张紧度十份重要，如果料带的张紧度不够，料带会与涂布模头表面脱离，造成电极材料涂不上去；如果张紧度太紧，如果料带表面存在一些细小颗粒，在料带走带过程中，涂布模头的唇嘴一碰到料带表面的细小颗粒，就会刮破料带，经常会在料带刮出一个大孔或大口，甚至出现断带的现象，生产效率不高,生产出来的产品的良品率也偏低，因为，这种涂布方式对料带的张紧度要求十分严格，在实际涂布过程中，料带的张紧度受各种因素的影响，料带有时也会产生时松时紧的现象，所以还是会造成涂布厚度和重量不均，或是料带出现孔洞的问题；
　　综上所述，均是先进行正面涂布，后进行反面涂布。这种先进行正面涂布，后进行反面涂布的方式，存在如下问题：一是在料带进入烤箱前进行反面涂布，这时料带会受气浮烤箱内的气体的影响产生抖动，而影响反面涂布的厚度的精度；二是现有的反面涂布都是将反面涂布头设在料带的下面，这里对反面涂布头的涂布压力控制要求很高，如果反面涂布头的涂布压力过小，电极材料不能很好涂布到料带上，会出现漏涂的问题；如果反面涂布头的涂布压力过大，会出现涂布厚度偏厚的问题；三是如果产生漏涂后，漏出的多余的电极材料在重力的作用下，会沿着反面涂布头外壁向下流，造成电极材料的浪费，以及对环境的污染。
发明内容
为了克服上述问题，本发明向社会提供一种不会产生漏涂、不会产生电极材料沿着反面涂布头外壁向下流和涂布厚度不均匀的新型双面涂布方法及装置。
　　本发明的技术方案是：提供一种新型双面涂布方法，包括：
　　S1、将正面涂布模头和反面涂布模头设在烘干箱的进料口一侧；
　　S2、设置至少一个张力辊，张力辊与料带的正面接触，至少用于改变料带的前进方向，且沿料带的前进方向分为反面涂布区域和正面涂布区域；
　　S3、将反面涂布模头设置在反面涂布区域内；由反面涂布模头先将电极材料涂布在料带的反面上；
　　S4、将正面涂布模头设置在反面涂布模头与烘干箱之间，由正面涂布模头再将电极材料涂布在料带的正面上。
　　作为对本发明的改进，在所述反面涂布模头之后的反面涂布区域的附近设有对反面涂布模头所涂的电极材料进行干燥的干燥装置。
　　作为对本发明的改进，所述张力辊为两个，其中一个与料带的反面接触，与料带反面接触的张力辊位于与料带正面接触的张力辊的前面。
　　作为对本发明的改进，两个所述张力辊之间的料带反面为反面涂布区域。
　　作为对本发明的改进，所述张力辊为两个，两个所述张力辊均与料带的正面接触。
　　作为对本发明的改进，两个所述张力辊之间的料带反面为反面涂布区域。
　　作为对本发明的改进，所述料带与张力辊切点之间的夹角在0－90度之间选择。
　　本发明还提供一种新型双面涂布装置，包括正面涂布模头和反面涂布模头，正面涂布模头和反面涂布模头位于烘干箱的进料口一侧，至少一个张力辊，所述张力辊与料带的正面接触，用于改变料带的前进方向，且沿料带的前进方向分为反面涂布区域和正面涂布区域；所述反面涂布模头设置在反面涂布区域内的任意位置；并由反面涂布模头先将电极材料涂布在料带的反面上；将正面涂布模头设置在反面涂布模头与烘干箱之间，由正面涂布模头再将电极材料涂布在料带的正面上。
　　作为对本发明的改进，在所述反面涂布模头之后的反面涂布区域的附近设有对反面涂布模头所涂的电极材料进行干燥的干燥装置。
　　作为对本发明的改进，所述张力辊为两个，其中一个与料带的反面接触，与料带反面接触的张力辊位于与料带正面接触的张力辊的前面。
　　作为对本发明的改进，两个所述张力辊之间的料带反面为反面涂布区域。
　　作为对本发明的改进，所述张力辊为两个，两个所述张力辊均与料带的正面接触。
　　作为对本发明的改进，两个所述张力辊之间的料带反面为反面涂布区域。
　　作为对本发明的改进，所述料带与张力辊切点之间的夹角在0－90度之间选择。
　　本发明具有不会产生漏涂、不会产生电极材料沿着反面涂布头外壁向下流和涂布厚度均匀的优点。
附图说明
　　图1是本发明方法的一种实施例的方框结构示意图。
　　图2是本发明装置的第一种实施例的结构示意图。
　　图3是本发明装置的第二种实施例的结构示意图。
　　图4是本发明装置的第三种实施例的结构示意图。
　　图5是本发明装置的第四种实施例的结构示意图。
　　图6是本发明装置的第五种实施例的结构示意图。
　　图7是本发明装置的第六种实施例的结构示意图。
　　图8是本发明装置的第七种实施例的结构示意图。
　　图9是本发明装置的第八种实施例的结构示意图。
　　图10是本发明装置的第九种实施例的结构示意图。
　　图11是本发明装置的第十种实施例的结构示意图。
　　图12是本发明装置的第十一种实施例的结构示意图。
　　图13是本发明装置的第十二种实施例的结构示意图。
　　图14是本发明装置的第十三种实施例的结构示意图。
　　图15是本发明装置的第十四种实施例的结构示意图。
　　图16是本发明装置的第十五种实施例的结构示意图。
　　图17是本发明装置的第十六种实施例的结构示意图。
具体实施方式
　　 　在本发明的描述中，需要理解的是，术语中“中心”、“上”、“下”、“前”、“后”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或组件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
　　在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“连接”、“相连”应做广义理解，例如，可以是固定连接，也可以是拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以是通过中间媒介间接相连，可以是两个组件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明的具体含义。
　　需要说明的是：本发明中的料带8的正面是指料带8在进入烘干箱之前，料带8的处于向上的哪一面，而反面则是指正面是指料带8在进入烘干箱之前，料带8的处于向下的哪一面；所谓正面涂布区域是指在料带8的正面上可涂布的区域，反面涂布区域是指在料带8的反面上可涂布的区域。
　　请参见图1，图1揭示的是一种新型双面涂布方法，本方法发明中的标号，可以参见下述的装置中的标号，其含义是一样的，包括：
　　S1、将正面涂布模头1和反面涂布模头2设在烘干箱3的进料口一侧；也就是在烘干箱3的同侧，进行双面涂布，这里的烘干箱3只能用气浮式的烘干箱3；
　　S2、设置至少一个张力辊4，张力辊4与料带8的正面接触，至少用于改变料带8的前进方向，当然，张力辊4也可以用于保持料带8的预定张力，且沿料带8的前进方向分为反面涂布区域6和正面涂布区域5；当设置一个张力辊4时，如一个张力辊与放料辊配合，构成改变料带8的前时方向时，所述反面涂布区域6就是在料带8与所述张力辊4相接触的部分61，以及料带8与张力辊4相接触的部分61的靠近张力辊4的前面部分62和/或靠近张力辊4的后面部分63加起来总和为反面涂布区域6；正面涂布区域5位于所述张力辊4与烘干箱3之间，为了减轻料带8在进入烘干箱3时的抖动对正面涂布模头1的影响，可以在正面涂布模头1与所述张力辊4之间设一个稳定辊11，所述稳定辊11与料带8的正面接触。
　　S3、将反面涂布模头2设置在反面涂布区域6内；由反面涂布模头2先将电极材料涂布在料带8的反面上；一般来讲，料带8的行进方向是从上往下前进，再通过张力辊4改变料带8的方向，这样，就使得料带8的反面涂布区域6的大部分在涂布时为朝上或朝外侧，这样就有利于反面涂布模头2的设置，反面涂布模头2可以向下朝向反面涂布区域6设置，也可以水平朝向反面涂布区域6，这两种设置其效果最佳；当然，也可以将反面涂布模头2可以向上在张力辊4的附近朝向反面涂布区域6设置，这时，虽然涂布效果不如前两种的方式，但是，由于张力辊4的存在，料带8不会振动，只需控制好涂布压力，也可以达到较理想的反面涂布效果；克服了传统的反面涂布过程中会产生漏涂或产生电极材料沿反面涂布头下流，造成浪费和污染的问题。
　　S4、将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，由正面涂布模头1再将电极材料涂布在料带8的正面上；正面涂布模头1的端头可以悬于料带8的上方设置，构成幕帘涂布；也可以是正面涂布模头1的端头与料带8接触式设置，无论是正面涂布模头1的端头悬于料带8的上方设置，还是正面涂布模头1的端头与料带8接触式设置，即使是料带8在进入烘干箱3之前有所抖动，也不会影响涂布的厚度的均匀性。
　　优选的，在所述反面涂布模头2之后的反面涂布区域6的附近设有对反面涂布模头2所涂的电极材料进行干燥的干燥装置7，设置干燥装置7可以快速地对反面涂布模头2所涂的电极材料进行干燥，以防止其在重力作用下流动，对涂布厚度的均匀性产生影响。
　　优选的，所述张力辊4可以为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；这样的话，可以扩展反面涂布区域6的范围，也就是说，两个所述张力辊4之间的料带8反面都可以为反面涂布区域6。
　　还有一种情况是，所述张力辊4可以为两个，两个所述张力辊4均与料带8的正面接触，同样地，这种情况也可以扩展反面涂布区域6的范围，也就是说，两个所述张力辊4之间的料带8反面为反面涂布区域6。
　　根据料带8与张力辊4的相对位置，所述料带8与张力辊4之间的夹角在0－90度之间选择，也就是说，料带8可以是相对于张力辊4竖直设置，也可以相对于张力辊4水平设置，也可以是相对于张力辊4呈0－90度之间的任意锐角设置，具体内容，可以参见下述对装置的具体描述。
　　请参见图2，图2所示的是本发明的新型双面涂布装置的第一种实施例，包括正面涂布模头1和反面涂布模头2，正面涂布模头1和反面涂布模头2位于烘干箱3的进料口一侧，至少一个张力辊4，所述张力辊4与料带8的正面接触，用于改变料带8的前进方向和用于保持料带8的预定张力，且沿料带8的前进方向分为反面涂布区域6和正面涂布区域5；所述反面涂布模头2设置在反面涂布区域6内，且是在料带8与张力辊4相接触的部分61的靠近张力辊4的前面部分62上；并由反面涂布模头2先将电极材料涂布在料带8的反面上；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，由正面涂布模头1再将电极材料涂布在料带8的正面上；所述料带8的走向为竖直走向，所述料带8与张力辊4之间的夹角在90度，反面涂布模头2是水平设置的，从水平方向向料带8进行涂布。本发明由于采用先涂布料带8的反面，并且在料带8与张力辊4相接触或相接触的附近料带8比较稳定的区域进行涂布，这样，就可以避免传统的反面涂布模头设在烘干箱进口附近的料带8下面进行涂布时，由于料带8抖动，而带来的漏涂、电极材料沿着反面涂布头外壁向下流和涂布厚度不均匀的问题；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，且正面涂布模头1位于料带8的正面上方，相对于料带8悬挂或轻接触，即使是料带8有轻微抖动，也不会造成正面上的电极材料的漏涂和涂布厚度不均匀的问题。
　　优选的，本实施例中，在所述反面涂布模头2之后的反面涂布区域6的附近设有对反面涂布模头2所涂的电极材料进行干燥的干燥装置7，所述干燥装置7可以是一个整体式的干燥装置，也可以是一个分体式的干燥装置。所述干燥装置7的干燥温度，根把电极材料的不同可以在80－180摄氏度之间选择。
　　优选的，为了减轻料带8在进入烘干箱3时的抖动对正面涂布模头1的影响，可以在正面涂布模头1与所述张力辊4之间设一个稳定辊11，所述稳定辊11与料带8的正面接触。
　　请参见图3，图3所示的是本发明的新型双面涂布装置的第二种实施例，包括正面涂布模头1和反面涂布模头2，正面涂布模头1和反面涂布模头2位于烘干箱3的进料口一侧，至少一个张力辊4，所述张力辊4与料带8的正面接触，用于改变料带8的前进方向和用于保持料带8的预定张力，且沿料带8的前进方向分为反面涂布区域6和正面涂布区域5；所述反面涂布模头2设置在反面涂布区域6内，且是在料带8与张力辊4相接触的部分61上；并由反面涂布模头2先将电极材料涂布在料带8的反面上；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，由正面涂布模头1再将电极材料涂布在料带8的正面上；所述料带8的走向为竖直走向，所述料带8与张力辊4之间的夹角在90度，反面涂布模头2是水平设置的，从水平方向向料带8进行涂布。本发明由于采用先涂布料带8的反面，并且在料带8与张力辊4相接触或相接触的附近料带8比较稳定的区域进行涂布，这样，就可以避免传统的反面涂布模头设在烘干箱进口附近的料带8下面进行涂布时，由于料带8抖动，而带来的漏涂、电极材料沿着反面涂布头外壁向下流和涂布厚度不均匀的问题；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，且正面涂布模头1位于料带8的正面上方，相对于料带8悬挂或轻接触，即使是料带8有轻微抖动，也不会造成正面上的电极材料的漏涂和涂布厚度不均匀的问题。
　　优选的，本实施例中，在所述反面涂布模头2之后的反面涂布区域6的附近设有对反面涂布模头2所涂的电极材料进行干燥的干燥装置7，所述干燥装置7可以是一个整体式的干燥装置，也可以是一个分体式的干燥装置。所述干燥装置7的干燥温度，根把电极材料的不同可以在80－180摄氏度之间选择。
　　优选的，为了减轻料带8在进入烘干箱3时的抖动对正面涂布模头1的影响，可以在正面涂布模头1与所述张力辊4之间设一个稳定辊11，所述稳定辊11与料带8的正面接触。
　　请参见图4，图4所示的是本发明的新型双面涂布装置的第三种实施例，包括正面涂布模头1和反面涂布模头2，正面涂布模头1和反面涂布模头2位于烘干箱3的进料口一侧，至少一个张力辊4，所述张力辊4与料带8的正面接触，用于改变料带8的前进方向和用于保持料带8的预定张力，且沿料带8的前进方向分为反面涂布区域6和正面涂布区域5；所述反面涂布模头2设置在反面涂布区域6内，且是在料带8与张力辊4相接触的部分61上；并由反面涂布模头2先将电极材料涂布在料带8的反面上；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，由正面涂布模头1再将电极材料涂布在料带8的正面上；所述料带8的走向为从上往下呈锐角的斜向走向，所述料带8与张力辊4之间的夹角是锐角，反面涂布模头2是水平设置的，从水平方向向料带8进行涂布；显然，所述反面涂布模头2也可以竖直对准料带8的位于张力辊4之前的斜向料带8的任意位置来设置（参见图9）。本发明由于采用先涂布料带8的反面，并且在料带8与张力辊4相接触或相接触的附近料带8比较稳定的区域进行涂布，这样，就可以避免传统的反面涂布模头设在烘干箱进口附近的料带8下面进行涂布时，由于料带8的抖动，而带来的漏涂、电极材料沿着反面涂布头外壁向下流和涂布厚度不均匀的问题；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，且正面涂布模头1位于料带8的正面上方，相对于料带8悬挂或轻接触，即使是料带8有轻微抖动，也不会造成正面上的电极材料的漏涂和涂布厚度不均匀的问题。
　　优选的，本实施例中，在所述反面涂布模头2之后的反面涂布区域6的附近设有对反面涂布模头2所涂的电极材料进行干燥的干燥装置7，所述干燥装置7可以是一个整体式的干燥装置，也可以是一个分体式的干燥装置。所述干燥装置7的干燥温度，根把电极材料的不同可以在80－180摄氏度之间选择（干燥装置7在图中未画出）。
　　优选的，为了减轻料带8在进入烘干箱3时的抖动对正面涂布模头1的影响，可以在正面涂布模头1与所述张力辊4之间设一个稳定辊11，所述稳定辊11与料带8的正面接触。
　　请参见图5，图5所示的是本发明的新型双面涂布装置的第四种实施例，包括正面涂布模头1和反面涂布模头2，正面涂布模头1和反面涂布模头2位于烘干箱3的进料口一侧，至少一个张力辊4，所述张力辊4与料带8的正面接触，用于改变料带8的前进方向和用于保持料带8的预定张力，且沿料带8的前进方向分为反面涂布区域6和正面涂布区域5；所述反面涂布模头2设置在反面涂布区域6内，且是在料带8与张力辊4相接触的部分61的靠近张力辊4的后面部分63上；并由反面涂布模头2先将电极材料涂布在料带8的反面上；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，由正面涂布模头1再将电极材料涂布在料带8的正面上；所述料带8的走向为呈锐角的斜向走向，所述料带8与张力辊4之间的夹角是锐角，反面涂布模头2是垂直设置于料带8的下方，从下往上的方向向料带8进行涂布；这种状态虽然没有上述实施例的反面涂面效果好，但是，由于反面涂布区域6处理于张力辊4的后面附近，料带8行进时比较稳定，只需要控制好涂布压力，还是可以比传统的反面涂布法的涂布效果好的。本发明将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，且正面涂布模头1位于料带8的正面上方，相对于料带8悬挂或轻接触，即使是料带8有轻微抖动，也不会造成正面上的电极材料的漏涂和涂布厚度不均匀的问题。
　　优选的，本实施例中，在所述反面涂布模头2之后的反面涂布区域6的附近设有对反面涂布模头2所涂的电极材料进行干燥的干燥装置7，所述干燥装置7可以是一个整体式的干燥装置，也可以是一个分体式的干燥装置。所述干燥装置7的干燥温度，根把电极材料的不同可以在80－180摄氏度之间选择（干燥装置7在图中未画出）。
　　优选的，为了减轻料带8在进入烘干箱3时的抖动对正面涂布模头1的影响，可以在正面涂布模头1与所述张力辊4之间设一个稳定辊11，所述稳定辊11与料带8的正面接触。
　　请参见图6，图6所示的是本发明的新型双面涂布装置的第五种实施例，包括正面涂布模头1和反面涂布模头2，正面涂布模头1和反面涂布模头2位于烘干箱3的进料口一侧，至少一个张力辊4，所述张力辊4与料带8的正面接触，用于改变料带8的前进方向和用于保持料带8的预定张力，且沿料带8的前进方向分为反面涂布区域6和正面涂布区域5；所述反面涂布模头2设置在反面涂布区域6内，且是在料带8与张力辊4相接触的部分61的前面部分62上，并且所述前面部分62的料带是水平设置的，所述反面涂布模头2竖直设置在所述前面部分62的上方悬挂或所述反面涂布模头2的端头与料带8接触；并由反面涂布模头2先将电极材料涂布在料带8的反面上；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，由正面涂布模头1再将电极材料涂布在料带8的正面上；所述料带8的走向为呈锐角的斜向走向，所述料带8与张力辊4之间的夹角是锐角，反面涂布模头2是水平设置的，从水平方向向料带8进行涂布；显然，所述反面涂布模头2也可以竖直对准料带8的位于张力辊4之前的斜向料带8的任意位置来设置。本发明由于采用先涂布料带8的反面，这样，就可以避免传统的反面涂布模头设在烘干箱进口附近的料带8下面进行涂布时，由于料带8抖动，而带来的漏涂、电极材料沿着反面涂布头外壁向下流和涂布厚度不均匀的问题；将正面涂布模头1设置在反面涂布模头2与烘干箱3之间，且正面涂布模头1位于料带8的正面上方，相对于料带8悬挂或轻接触，即使是料带8有轻微抖动，也不会造成正面上的电极材料的漏涂和涂布厚度不均匀的问题。
　　优选的，本实施例中，在所述反面涂布模头2之后的反面涂布区域6的附近设有对反面涂布模头2所涂的电极材料进行干燥的干燥装置7，所述干燥装置7可以是一个整体式的干燥装置，也可以是一个分体式的干燥装置。所述干燥装置7的干燥温度，根把电极材料的不同可以在80－180摄氏度之间选择（干燥装置7在图中未画出）。
　　优选的，为了减轻料带8在进入烘干箱3时的抖动对正面涂布模头1的影响，可以在正面涂布模头1与所述张力辊4之间设一个稳定辊11，所述稳定辊11与料带8的正面接触。
　　请参见图7，图7所示的是本发明的新型双面涂布装置的第六种实施例，图7所示实施例与图3所示实施例基本相同，所不同的是所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图8，图8所示的是本发明的新型双面涂布装置的第七种实施例，图8所示实施例与图4所示实施例基本相同，所不同的是所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图9，图9所示的是本发明的新型双面涂布装置的第八种实施例，图9所示实施例与图8所示实施例基本相同，所不同的是反面涂布模头2呈倾斜角度相对于张力辊4的斜下方布置，这样更加有利于电极材料的流出；在图9所示实施例中，所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图10，图10所示的是本发明的新型双面涂布装置的第九种实施例，图10所示实施例与图9所示实施例基本相同，所不同的是反面涂布模头2呈倾斜角度相对于张力辊4的斜下方布置，这样更加有利于电极材料的流出；在图10所示实施例中，所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图11，图11所示的是本发明的新型双面涂布装置的第十种实施例，图11所示实施例与图9所示实施例基本相同，所不同的是所述料带8与张力辊4之间的夹角更小，并且由多个过辊9构成料带通路。本实施例中，反面涂布模头2呈倾斜角度相对于张力辊4的斜下方布置，这样更加有利于电极材料的流出；在图11所示实施例中，所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图12，图12所示的是本发明的新型双面涂布装置的第十一种实施例，图12所示实施例与图11所示实施例基本相同，所不同的是反面涂布模头2位于两个张力辊4之间的反面涂布区域内，这样更加有利于反面涂布模头的现场布置。本实施例中，所述料带8与张力辊4之间的夹角更小，并且由多个过辊9构成料带通路。在图12所示实施例中，所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图13，图13所示的是本发明的新型双面涂布装置的第十二种实施例，图13所示实施例与图12所示实施例基本相同，所不同的是两个张力辊4之间的料带呈水平状态，反面涂布模头2位于两个张力辊4之间的反面涂布区域内，并且竖向布置，这样可以更好地达到反面涂布效果。本实施例中，所述料带8与张力辊4之间的夹角更小，并且由多个过辊9构成料带通路。在图13所示实施例中，所述张力辊4为两个，其中一个与料带8的反面接触，与料带8反面接触的张力辊位于与料带8正面接触的张力辊的前面；并且在第一过辊9前面设有放卷辊10，用于放出料带8。
　　请参见图14，图14所示的是本发明的新型双面涂布装置的第十三种实施例，图14所示实施例与图7所示实施例基本相同，所不同的是省去了中间的过辊9，所述张力辊4为两个，两个所述张力辊4均与料带8的正面接触；两个所述张力辊4之间的料带8反面为反面涂布区域6。本实施例中的料带8是竖向设置的。
　　请参见图15，图15所示的是本发明的新型双面涂布装置的第十四种实施例，图15所示实施例与图14所示实施例基本相同，所不同的是料带8是斜向设置的；本实施例中，省去了中间的过辊9，所述张力辊4为两个，两个所述张力辊4均与料带8的正面接触；两个所述张力辊4之间的料带8反面为反面涂布区域6。本实施例中的料带8是竖向设置的。
　　请参见图16，图16所示的是本发明的新型双面涂布装置的第十五种实施例，图16所示实施例与图15所示实施例基本相同，所不同的是反面涂布模头2位于斜向设置的料带8的一侧；本实施例中，省去了中间的过辊9，所述张力辊4为两个，两个所述张力辊4均与料带8的正面接触；两个所述张力辊4之间的料带8反面为反面涂布区域6。本实施例中的料带8是竖向设置的。
　　请参见图17，图17所示的是本发明的新型双面涂布装置的第十六种实施例，图17所示实施例与图16所示实施例基本相同，所不同的是反面涂布模头2位于靠近张力辊4的后面部分63的反面涂布区域，并且与料带8呈锐角斜向上设置；显然，反面涂布模头2也可垂直于料带8向上设置；本实施例中，省去了中间的过辊9，所述张力辊4为两个，两个所述张力辊4均与料带8的正面接触；两个所述张力辊4之间的料带8反面为反面涂布区域6。本实施例中的料带8是竖向设置的。

Claims (1)

  1. 1. 一种新型双面涂布方法，包括：
    S1、将正面涂布模头(1)和反面涂布模头(2)设在烘干箱(3)的进料口一侧；其特征在于，
    S2、设置至少一个张力辊(4)，张力辊(4)与料带的正面接触，至少用于改变料带的前进方向，且沿料带的前进方向分为反面涂布区域(6)和正面涂布区域(5)；
    S3、将反面涂布模头(2)设置在反面涂布区域(6)内；由反面涂布模头(2)先将电极材料涂布在料带的反面上；
    S4、将正面涂布模头(1)设置在反面涂布模头(2)与烘干箱(3)之间，由正面涂布模头(1)再将电极材料涂布在料带的正面上。
    2. 根据权利要求1所述的新型双面涂布方法，其特征在于：在所述反面涂布模头(2)之后的反面涂布区域(6)的附近设有对反面涂布模头(2)所涂的电极材料进行干燥的干燥装置（7）。
    3. 根据权利要求1或2所述的新型双面涂布方法，其特征在于：所述张力辊(4)为两个，其中一个与料带的反面接触，与料带反面接触的张力辊位于与料带正面接触的张力辊的前面。
    4. 根据权利要求3所述的新型双面涂布方法，其特征在于：两个所述张力辊(4)之间的料带反面为反面涂布区域(6)。
    5. 根据权利要求1或2所述的新型双面涂布方法，其特征在于：所述料带与张力辊(4)切点之间的夹角在0－90度之间选择。
    6. 一种新型双面涂布装置，其特征在于：包括正面涂布模头(1)和反面涂布模头(2)，正面涂布模头(1)和反面涂布模头(2)位于烘干箱(3)的进料口一侧，其特征在于：还包括至少一个张力辊(4)，所述张力辊(4)与料带的正面接触，用于改变料带的前进方向，且沿料带的前进方向分为反面涂布区域(6)和正面涂布区域(5)；所述反面涂布模头(2)设置在反面涂布区域(6)内的任意位置；并由反面涂布模头(2)先将电极材料涂布在料带的反面上；将正面涂布模头(1)设置在反面涂布模头(2)与烘干箱(3)之间，由正面涂布模头(1)再将电极材料涂布在料带的正面上。
    7. 根据权利要求6所述的新型双面涂布装置，其特征在于：在所述反面涂布模头(2)之后的反面涂布区域(6)的附近设有对反面涂布模头(2)所涂的电极材料进行干燥的干燥装置（7）。
    8. 根据权利要求6或7所述的新型双面涂布装置，其特征在于：所述张力辊(4)为两个，其中一个与料带的反面接触，与料带反面接触的张力辊位于与料带正面接触的张力辊的前面。
    9. 根据权利要求8所述的新型双面涂布装置，其特征在于：两个所述张力辊(4)之间的料带反面为反面涂布区域(6)。
    10. 根据权利要求6或7所述的新型双面涂布装置，其特征在于：所述料带与张力辊(4)切点之间的夹角在0－90度之间选择。
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