阅读说明：本技术 隔板涂覆装置 (Separator coating device ) 是由 金陈宇 具忠显 朴镇晟 于 2020-02-10 设计创作，主要内容包括：本发明的实施例提供一种隔板涂覆装置,在该隔板涂覆装置中,有机浆料的弯月面被稳定地保持在隔板和涂覆棒分离的部分(行进的隔板的流出侧)中。本发明的实施例提供一种隔板涂覆装置,该隔板涂覆装置包括：涂覆棒,该涂覆棒在隔板的传送方向上旋转并将有机浆料涂覆在所述隔板上；棒保持器,该棒保持器通过在所述棒保持器和所述涂覆棒之间形成间隙以使所述涂覆棒能够旋转来供应所述有机浆料；涂覆块,该涂覆块通过朝向所述棒保持器的两侧设置的供应通道将所述有机浆料供应至所述涂覆棒；以及从所述棒保持器朝向所述涂覆棒设置的支撑件。(An embodiment of the present invention provides a separator coating apparatus in which a meniscus of an organic slurry is stably maintained in a portion (an outflow side of a traveling separator) where the separator and a coating rod are separated. An embodiment of the present invention provides a separator coating apparatus including: a coating rod that rotates in a conveying direction of the separator and coats the organic slurry on the separator; a rod holder that supplies the organic slurry by forming a gap between the rod holder and the coating rod to enable the coating rod to rotate; a coating block supplying the organic paste to the coating rod through supply channels provided toward both sides of the rod holder; and a support disposed from the rod holder toward the coating rod.)

1. A separator coating apparatus comprising:

a coating rod that rotates in a conveying direction of the separator and coats the organic slurry on the separator;

a rod holder that supplies the organic slurry by forming a gap between the rod holder and the coating rod to enable the coating rod to rotate;

a coating block supplying the organic paste to the coating rod through supply channels provided toward both sides of the rod holder; and

a support disposed from the rod holder toward the coating rod.

2. The separator coating apparatus of claim 1, wherein

The support temporarily contacts and supports or is separated from the coating rod at a side of the partition separated from the coating rod in the conveying direction as the coating rod rotates.

3. The separator coating apparatus of claim 1, wherein

The rod holder is parallel to the coating rod and has a length set in a width direction of the partition, and

the rod holder includes:

a first holder portion provided below the coating rod to form a first gap with a lower portion of the coating rod; and

a second holder portion connected to the first holder portion to form a second gap with a side portion of the coating rod at an inflow side of the separator.

4. The separator coating apparatus of claim 3, wherein

The support is provided on the first holder part to contact and support or be separated from the rotating coating rod.

5. The separator coating apparatus of claim 4, wherein

The support is formed such that an outer side surface thereof is inclined at an angle with respect to a vertical line of a plane of the first holder part so as to correspond to a meniscus of the organic slurry formed in the supply channel.

6. The separator coating apparatus according to claim 5,

in the support member, a plurality of support members are provided,

an inner side surface thereof is formed perpendicular to a plane of the first holder portion, and

an upper end of the inner side surface and an upper end of the outer side surface form a support portion having an acute angle in a cross-sectional view and a linear shape in a longitudinal direction.

7. The separator coating apparatus of claim 6, wherein

The support is integrally formed in the entire length region of the coating rod.

8. The separator coating apparatus according to claim 6,

in the support member, a plurality of support members are provided,

the supporting parts and the evacuation slots are alternately arranged in the entire length region of the coating rod.

9. The separator coating apparatus of claim 6, wherein

A plurality of supporting members are provided, an

The plurality of supports are spaced apart from each other at predetermined intervals throughout the entire length of the coating rod.

10. The separator coating apparatus of claim 5, wherein

In the support member, a plurality of support members are provided,

an inner side surface thereof is formed perpendicular to a plane of the first holder portion, and

an upper end of the inner side surface and an upper end of the outer side surface form a support portion having a rounded shape in a cross-sectional view and a linear shape in a longitudinal direction.

11. The separator coating apparatus according to claim 5,

in the support member, a plurality of support members are provided,

an inner side surface thereof is formed perpendicular to a plane of the first holder portion, and

the connection of the upper end of the inner side surface and the upper end of the outer side surface is provided with a roller having a linear shape in the longitudinal direction.

12. The separator coating apparatus according to claim 5,

in the support member, a plurality of support members are provided,

an inner side surface thereof is formed perpendicular to a plane of the first holder portion, and

the connecting portion of the upper end of the inner side surface and the upper end of the outer side surface is provided with a roller having a linear shape in the longitudinal direction and formed with a spiral portion.

13. A separator coating apparatus comprising:

a coating rod that rotates in a conveying direction of the separator and coats the organic slurry on the separator;

a rod holder that supplies the organic slurry by forming a gap between the rod holder and the coating rod to enable the coating rod to rotate;

a coating block supplying the organic paste to the coating rod through supply channels provided toward both sides of the rod holder; and

a support provided from the rod holder toward the coating rod to be formed to extend a meniscus of the organic slurry connecting the supply channel and the coating rod at an outflow side of the partition.

14. The separator coating apparatus of claim 13, wherein

The support is formed such that an outer side surface thereof is inclined at an angle with respect to a vertical line of a plane of the first holder part so as to correspond to a meniscus of the organic slurry formed in the supply channel, and

an inner side surface of the support connected to an upper end of the outer side surface is formed perpendicular to a plane of the first holder portion.

Technical Field

The present disclosure relates to a separator coating apparatus, and more particularly, to a separator coating apparatus that can stably maintain a meniscus of an organic slurry including a binder and a filler at a portion where a separator and a coating rod are separated (an outflow side of a traveling separator).

Background

A rechargeable battery is a battery that repeatedly undergoes charge and discharge, unlike a primary battery. Small capacity rechargeable batteries are used in portable electronic devices such as mobile phones, laptop computers, and camcorders. Rechargeable batteries of large capacity and high density are used as power sources or energy storages for driving motors of hybrid vehicles and electric vehicles.

The rechargeable battery includes an electrode assembly for charging and discharging current, a case accommodating the electrode assembly, a cap plate coupled to an opening of the case, and an electrode terminal for leading the electrode assembly out of the cap plate.

The electrode assembly may be provided with a negative electrode and a positive electrode disposed at respective sides of a separator, which is an electrically insulating material, and the separator, the negative electrode, and the positive electrode may be formed to have a wound structure, a stacked structure, or a hybrid structure thereof. The separator is an interlayer film that continuously maintains ionic conductivity while separating a negative electrode and a positive electrode from each other in the electrode assembly, thereby enabling the electrode assembly to be charged and discharged.

However, when the electrode assembly is exposed to a high temperature state due to abnormal operation of the rechargeable battery, the separator is mechanically shrunk or damaged due to melting characteristics at a low temperature.

In this case, the negative electrode and the positive electrode may contact each other, so that the electrode assembly may catch fire. In order to overcome this problem, a technique capable of suppressing the shrinkage of the separator and ensuring the stability of the electrode assembly is required.

In this regard, the heat resistance of the separator may be improved by coating the separator with an organic slurry in which a filler with inorganic particles having high heat resistance and a viscous binder are mixed.

As an example, the separator coating apparatus is configured to coat an organic slurry on the separator to form a coating layer. The separator coating apparatus includes: a coating rod for coating the organic paste on the separator while conveying the separator; a rod holder for supplying an organic slurry by rotation of the coating rod; and a coating block for supplying the organic slurry to the rod holder and the coating rod via supply flow channels directed to respective sides of the rod holder.

While the separator is traveling, the organic slurry supplied while the coating rod is rotated in the traveling direction is supplied to the coating rod, and the organic slurry supplied by the rotation of the coating rod is coated on the separator.

In this case, since the rod holder is provided with the groove that opens upward toward the coating rod, although the coating rod is stably supported, the meniscus of the organic slurry becomes unstable at a portion where the partition separates from the coating rod (the outflow side of the traveling partition).

That is, since the meniscus of the organic paste becomes unstable at the portion where the separator and the coating rod are separated, the organic paste is hardened at the outflow side of the separator. The hardened organic paste is contained in the organic paste and coated on the separator to cause black spot defects of the organic paste.

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

Disclosure of Invention

An exemplary embodiment of the present invention provides a separator coating apparatus that stably maintains a meniscus of an organic slurry in a portion (an outflow side of a traveling separator) where a separator and a coating rod are separated.

In addition, exemplary embodiments of the present invention provide a separator coating apparatus that stably maintains a meniscus of an organic slurry to prevent the organic slurry from hardening, thereby preventing a black spot defect from occurring in a coating layer of a separator.

An embodiment of the present invention provides a separator coating apparatus including: a coating rod that rotates in a conveying direction of the separator and coats the organic slurry on the separator; a rod holder that supplies the organic slurry by forming a gap between the rod holder and the coating rod to enable the coating rod to rotate; a coating block supplying the organic paste to the coating rod through supply channels provided toward both sides of the rod holder; and a support disposed from the rod holder toward the coating rod.

The support may temporarily contact and support or be separated from the coating rod at a side of the partition separated from the coating rod in the conveying direction as the coating rod rotates.

The rod holder may be parallel to the coating rod and have a length set in a width direction of the partition, and may include: a first holder portion provided below the coating rod to form a first gap with a lower portion of the coating rod; and a second holder portion connected to the first holder portion to form a second gap with a side portion of the coating rod at an inflow side of the separator.

The support may be provided on the first holder part to contact and support or be separated from the rotating coating rod.

The support may be formed such that an outer side surface thereof may be inclined at an angle with respect to a vertical line of a plane of the first holder part so as to correspond to a meniscus of the organic paste formed in the supply channel.

In the support, an inner side surface thereof may be formed perpendicular to a plane of the first holder part, and an upper end of the inner side surface and an upper end of the outer side surface may form a support part having an acute angle in a cross-sectional view and a linear shape in a longitudinal direction.

The support may be integrally formed in the entire length region of the coating rod.

In the support, the supporting parts and the evacuation slots may be alternately disposed in the entire length region of the coating rod.

A plurality of supports may be provided, and the plurality of supports may be spaced apart from each other at a predetermined interval in the entire length region of the coating rod.

In the support, an inner side surface thereof may be formed perpendicular to a plane of the first holder part, and an upper end of the inner side surface and an upper end of the outer side surface may form a support part having a rounded shape in a cross-sectional view and a linear shape in a longitudinal direction.

In the support, an inner side surface thereof may be formed perpendicular to a plane of the first holder part, and a connection part of an upper end of the inner side surface and an upper end of the outer side surface may be provided with a roller having a linear shape in a longitudinal direction.

In the support, an inner side surface thereof may be formed perpendicular to a plane of the first holder part, and a connection part of an upper end of the inner side surface and an upper end of the outer side surface may be provided with a roller having a linear shape in a longitudinal direction and formed with a spiral part.

Another embodiment of the present invention provides a separator coating apparatus, including: a coating rod that rotates in a conveying direction of the separator and coats the organic slurry on the separator; a rod holder that supplies the organic slurry by forming a gap between the rod holder and the coating rod to enable the coating rod to rotate; a coating block supplying the organic paste to the coating rod through supply channels provided toward both sides of the rod holder; and a support provided from the rod holder toward the coating rod to be formed to extend a meniscus of the organic slurry connecting the supply channel and the coating rod at an outflow side of the partition.

The support may be formed such that an outer side surface thereof may be inclined at an angle with respect to a vertical line of a plane of the first holder part so as to correspond to a meniscus of the organic slurry formed in the supply channel, and an inner side surface of the support connected to an upper end of the outer side surface may be formed perpendicular to the plane of the first holder part.

In this way, according to the embodiment of the present invention, the support is disposed from the rod holder toward the coating rod, so that the meniscus of the organic slurry can be stably held in the portion where the separator and the coating rod are separated (the outflow side of the traveling separator).

In this way, according to the embodiment, the support can stably maintain the meniscus of the organic slurry while temporarily contacting or separating with the coating rod at the side where the partition separates from the coating rod in the conveyance direction (the outflow side of the traveling partition) as the coating rod rotates.

Therefore, according to the embodiment, the organic paste can be prevented from being hardened, and thus the occurrence of black spot defects in the coating layer of the separator can be prevented.

Drawings

Fig. 1 is a perspective view of a separator coating apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view illustrating in detail the coating rod and rod holder of FIG. 1.

Fig. 3 is a cross-sectional view taken along line iii-iii of fig. 1.

Fig. 4 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a second embodiment of the present invention.

Fig. 5 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a third embodiment of the present invention.

Fig. 6 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a fourth embodiment of the present invention.

Fig. 7 is a partial perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a fifth embodiment of the present invention.

Fig. 8 is a cross-sectional view taken along line viii-viii of fig. 7.

Fig. 9 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a sixth embodiment of the present invention.

Detailed Description

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive. Like reference numerals refer to like elements throughout the specification.

Fig. 1 is a perspective view of a separator coating apparatus according to a first embodiment of the present invention, fig. 2 is a perspective view illustrating a coating rod and a rod holder of fig. 1, and fig. 3 is a cross-sectional view taken in detail along line iii-iii of fig. 1.

Referring to fig. 1 to 3, a separator coating apparatus 1 of the first embodiment includes a coating rod 10, a rod holder 20, a coating block 30, and a support 40 to form a coating layer by coating a separator W with an organic slurry S including a binder and a filler (e.g., inorganic particles).

The coating rod 10 coats the organic slurry S on one surface of the separator W, which is a coated body, while rotating in the conveyance direction of the separator W to form a coating layer. The coating rod 10 may be formed as a wireless coating rod having a round rod shape as shown, or may be formed as a wired coating rod having wires provided on the round rod, although this is not shown.

Although not shown, the coating rod 10 is supported and rotated by a support part and a driving part which are separately provided. Although not shown, the separator W is supplied by an uncoiler, a recoiler, and a backup roll, which are separately provided, and is recovered after the coating layer is formed.

In the first embodiment, the separator W travels from the left side to the right side of fig. 1, and the coating rod 10 rotates in the clockwise direction. That is, since the separator W and the coating rod 10 are transferred and rotated in the same direction, the frictional force therebetween may be minimized.

Although not shown, when the separator coating apparatus of the first embodiment is further separately provided, the separator may further include a coating layer coated on the other side thereof by coating the organic slurry with a coating rod. That is, the coating may be provided on one or both sides of the separator.

The coating rod 10 is rotated by a support and a driving part (not shown), and the rod holder 20 is installed to form a gap between the rod holder 20 and the coating rod 10, so that the coating rod 10 is rotatable, and the rod holder 20 is configured to supply the organic slurry S to the coating rod 10.

The coating block 30 is configured to supply the organic slurry S to the coating rod 10 via the rod holder 20 through supply channels 31 and 32 provided toward both sides of the rod holder 20.

The support 40 is disposed from the rod holder 20 toward the coating rod 10. While the coating rod 10 is rotated, the support 40 temporarily contacts and supports the coating rod 10 or is separated from the coating rod 10 at a side where the separator W is separated from the coating rod 10 in the conveying direction.

In addition, the coating rod 10 may be pulled and bent to one side (the outflow side of the separator) while the separator W travels. The support 40 is provided at a side to which the coating rod 10 is pulled or bent, and supports the coating rod 10 while repeatedly contacting and separating with the rotating coating rod 10. Therefore, the coating rod 10 is pulled or bent within an allowable range, and is not pulled or bent beyond the allowable range.

The rod holder 20 has a length W set in the width direction of the separator W while being parallel to the coating rod 10. As an example, the rod holder 20 includes a first holder portion 21 and a second holder portion 22 to supply the organic slurry S to the coating rod 10.

The first holder part 21 is provided below the coating rod 10 to form a first gap G1 with the lower portion of the coating rod 10 so as to guide the organic slurry S supplied through the supply passage 32 to the coating rod 10 and the second holder part 22. In this case, the support 40 allows the organic slurry S to be supplied to the second gap G2 while supporting the rotating coating rod 10.

The second holder portion 22 is connected to the first holder portion 21 to form a second gap G2 with the side surface of the coating rod 10 at the inflow side of the traveling separator W, and guides the organic slurry supplied from the first holder portion 21 to the coating rod 10.

In addition, the second holder part 22 further guides the organic slurry S supplied to the supply channel 31 to the coating rod 10 through the other side surface.

The organic paste S supplied to the second gap G2 and the supply channel 31 is supplied to the inflow side of the traveling separator W, and is coated on the separator W through the separator W and the coating rod 10 at the inflow side of the separator W.

In this case, a support 40 is provided on the first holder part 21 to contact and support the rotating coating rod 10 or to be separated from the rotating coating rod 10. In addition, the support 40 extends at the outflow side of the traveling separator W the meniscus of the organic slurry S connecting the supply channel 32 and the coating rod 10.

The support 40 includes an outer side surface 41 and an inner side surface 42. The outer side surface 41 is formed to be inclined toward the coating bar 10 at a predetermined angle θ with respect to a perpendicular line to the plane of the first holder portion 21 so as to correspond to the meniscus of the organic slurry S formed in the supply channel 32.

Accordingly, the outer side surface 41 extends and uniformly forms a meniscus of the organic paste S with respect to the coating rod 10, while supplying the organic paste S supplied from the supply channel 32 upward to the coating rod 10.

The inner side surface 42 is connected to the outer side surface 41 at an upper end of the outer side surface 41, and is formed perpendicular to the plane of the first holder portion 21. Accordingly, the organic slurry S extending and uniformly forming the meniscus may be smoothly supplied to the first gap G1 through the vertical inner side surface 42 via the upper end of the supporter 40.

The inclination angle θ of the outer side surface 41 may be formed at the maximum within a range in which the meniscus of the organic slurry S is uniformly maintained, and may also be coated to be set at the minimum within a range not connected to the organic slurry S traveling to the outflow side of the separator W.

In the support 40 of the first embodiment, the upper end of the inner side surface 42 and the upper end of the outer side surface 41 form a support portion 43, and the support portion 43 forms an acute angle in a cross-sectional view (see fig. 3) and has a linear shape in the longitudinal direction (see fig. 2). In addition, the support 40 is integrally formed in the entire length region of the coating rod 10.

As the coating rod 10 is pulled or bent to one side along with the travel of the separator W, the support 40 contacts the coating rod in some regions of the entire length region and is separated from the coating rod in other regions thereof, and this operation is repeated at various positions in the entire length region.

As a result, the meniscus of the organic slurry S can be stably maintained at the outflow side of the running separator W. Therefore, the organic slurry S can be prevented from being hardened at the side of the coating rod 10 on the outflow side, and the black spot defect can be prevented in the coating of the separator W.

Hereinafter, various embodiments of the present invention will be described. The same configuration will be omitted as compared with the first embodiment and the previously described embodiments, and a different configuration will be described.

Fig. 4 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a second embodiment of the present invention. Referring to fig. 4, in the separator coating device 2 of the second embodiment, the supporter 240 is provided with the supporting portions 243 and the evacuation grooves 244 alternately formed in the entire length area of the coating rod 10. The supporting part 243 and the evacuation groove 244 may be formed to have various lengths L1 and L2, respectively.

When the support 240 supports the coating rod 10, the support 243 formed by the connection of the upper end of the outer side surface 241 and the upper end of the inner side surface 242 supports the coating rod 10 while being in contact with and separated from the coating rod 10, thereby extending and maintaining the meniscus of the organic slurry S.

Meanwhile, since the evacuation groove 244 accommodates an excessive portion of the organic slurry S guided to the support portion 243, it is possible to prevent the meniscus of the organic slurry S from being excessively extended by the support portion 243.

In addition, the evacuation groove 244 may supply a large amount of the organic slurry S, and the support portion 243 may supply a relatively small amount of the organic slurry S. The organic slurry S supplied from the supply channel 32 may be stably supplied to the second gap G2 and the coating rod 10 by the interaction of the evacuation groove 244 and the support portion 243.

When the coating rod 10 is pulled or bent to one side as the separator W travels, the supporter 240 is generally in contact with the coating rod at the supporting portion 243 throughout the entire length area and is separated from the coating rod at the evacuation groove 244, and this operation is repeated throughout the entire length area.

As a result, the meniscus of the organic slurry S can be stably maintained at the outflow side of the running separator W. Therefore, it is possible to prevent the organic paste S from being hardened at the side of the coating rod 10 on the outflow side, and to prevent the black spot defect in the coating of the separator W.

Fig. 5 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a third embodiment of the present invention. Referring to fig. 5, in the separator coating device 3 of the third embodiment, a plurality of supporting members 340 are provided and they are spaced apart from each other at a predetermined interval L32 throughout the entire length area of the coating rod 10. The length L31 of each supporting piece 340 and the interval L32 between the supporting pieces 340 may be respectively formed differently.

When the coating rod 10 is supported by the support 340, the support 343 formed by the connection of the upper end of the outer side surface 341 and the upper end of the inner side surface 342 supports the coating rod 10 while being in contact with and separated from the coating rod 10, thereby extending and maintaining the meniscus of the organic slurry S.

Meanwhile, since the interval L32 between the supporters 340 accommodates an excessive portion of the organic paste S guided to the supporting portion 343, the meniscus of the organic paste S can be prevented from being excessively extended by the supporting portion 343.

When the interval L32 between the supports 340 in the third embodiment is the same as the length L2 of the evacuation groove 244 in the second embodiment, an excessive portion of the organic slurry S can be more effectively accommodated compared to the evacuation groove 244 due to the depth difference.

Fig. 6 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a fourth embodiment of the present invention. Referring to fig. 6, in the separator coating device 4 of the fourth embodiment, the inner side surface 442 of the support member 440 is formed perpendicular to the plane of the first holder portion 21.

The upper end of the inner side surface 442 and the upper end of the outer side surface 441 are connected with a rounded corner in a cross-sectional view, and form a support portion 443 that is straight in the longitudinal direction. The supporting portion 443 having a rounded cross section may contact and support the coating rod 10 more smoothly than the supporting portion 43 formed at an acute angle in the first embodiment.

In addition, the supporting portion 443 extends and uniformly forms a meniscus of the organic slurry S while more smoothly supplying the organic slurry S supplied from the supply channel 32 to the coating rod 10.

Fig. 7 is a partial perspective view illustrating a coating rod and a rod holder of a separator coating apparatus according to a fifth embodiment of the present invention, and fig. 8 is a cross-sectional view taken in detail along line viii-viii of fig. 7.

Referring to fig. 7 and 8, in the separator coating device 5 of the fifth embodiment, the inner side surface 542 of the support 540 is formed perpendicular to the plane of the first holder portion 21.

The connecting portion of the upper end of the inner side surface 542 and the upper end of the outer side surface 541 is provided with a roller 543 that is straight in the longitudinal direction. The roller 543 may smoothly contact and support the coating rod 10 further than the supporting portion 43 formed at an acute angle in the first embodiment.

The roller 543 extends and uniformly forms a meniscus of the organic paste S while more smoothly supplying the organic paste S supplied from the supply passage 32 to the coating rod 10.

In addition, a plurality of rollers 543 are provided in the support 540 and spaced at a predetermined interval L52 throughout the entire length region of the coating rod 10. Since the length L31 of the supporting piece 340 and the interval L32 between the supporting pieces 340 may be formed differently in the third embodiment, the length L51 of the roller 543 and the interval L52 between the rollers 543 may also be formed differently in the fifth embodiment, respectively.

The roller 543 may contact and support the coating rod 10 more smoothly than the supporting portion 443 having a round cross section in the fourth embodiment and the supporting portion 43 formed at an acute angle in the first embodiment.

In addition, since the interval L52 between the rollers 543 evacuates an excessive portion of the organic paste S guided to the rollers 543, the meniscus of the organic paste S can be prevented from being excessively extended by the rollers 543.

Fig. 9 is a perspective view illustrating in detail a coating rod and a rod holder of a separator coating apparatus according to a sixth embodiment of the present invention. Referring to fig. 9, in the separator coating device 6 of the sixth embodiment, the inner side surface 642 of the support 640 is formed perpendicular to the plane of the first holder portion 21.

The connection portion of the upper end of the inner side surface 642 and the upper end of the outer side surface 641 is provided with a roller 643 which is straight in the longitudinal direction and formed with a spiral portion. The roller 643 formed with the spiral portion can support the coating rod 10 in many line contacts, compared with the roller 543 in the fifth embodiment.

The roller 643 formed with the spiral portion extends and uniformly forms the meniscus of the organic slurry S while more uniformly supplying the organic slurry S supplied from the supply passage 32 to the coating rod 10 than the roller 543 of the fifth embodiment.

While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

< description of symbols >

1. 2, 3, 4, 5, 6: separator coating device

10: coating rod 20: rod holder

30: coating block 21: a first holder part

22: second holder portions 31, 32: supply channel

40. 240, 340, 440, 540, 640: support piece

41. 241, 341, 441, 541, 641: outside surface

42. 242, 342, 442, 542, 642: inside surface

43. 243, 343, 443: support portion 244: evacuation groove

543. 643: roller

G1: first gap G2: second gap

L1: length of support portion L2: length of evacuation trough

L31: length of support L32: spacing between supports

L51: length of roller L52: spacing between rollers

S: organic slurry W: partition board

θ: angle of rotation