CN112271413B

CN112271413B - Platform area and platform area material feeding unit

Info

Publication number: CN112271413B
Application number: CN202010052808.XA
Authority: CN
Inventors: 朴相勳
Original assignee: Samsung SDI Co Ltd
Current assignee: Samsung SDI Co Ltd
Priority date: 2019-07-08
Filing date: 2020-01-17
Publication date: 2023-05-12
Anticipated expiration: 2040-01-17
Also published as: KR20210006204A; CN112271413A

Abstract

A platform belt and a platform belt feeding device are disclosed. According to the present disclosure, since the landing tape is directly adhered to the landing portion without punching the landing tape to match the landing tape with the electrode tab, the attachment convenience can be enhanced. In addition, since the platform band having a shape corresponding to the minimum area where the insulating band is to be applied is manufactured and supplied, a separate process step is not required, and the platform band can be commonly used even when the secondary batteries have different shapes and sizes. According to the deck tape feeding device of the present disclosure, since the lower release paper is automatically removed and the upper release paper is easily removed when the deck tape is supplied, the attachment convenience can be enhanced.

Description

Platform area and platform area material feeding unit

The present application claims priority and rights of korean patent application No. 10-2019-0082215 filed in the korean intellectual property office on 7.8 of 2019, the entire contents of which are incorporated herein by reference.

Technical Field

Various embodiments of the present disclosure relate to a platform belt and a feeding device for the platform belt.

Background

In general, an electronic device such as a notebook computer, a mini notebook computer, a netbook, a mobile computer, an Ultra Mobile Personal Computer (UMPC), or a portable multimedia player uses a battery pack as a portable power source, and the battery pack may have a plurality of battery cells connected in series and/or in parallel. The battery pack may include a Protection Circuit Module (PCM) for protecting the battery cells from overcharge, overdischarge, or overcurrent. The protection circuit module may be accommodated in the case together with the battery cell.

Examples of such a battery pack are disclosed in korean patent No. 10-1223732 registered on 1/11 in 2013.

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

Disclosure of Invention

Embodiments of the present disclosure provide a platform band having enhanced adhesion convenience and which can be used for general purposes by improving the configuration of the platform band for insulation between a secondary battery and a Protection Circuit Module (PCM), and a feeding device for the platform band.

These and other aspects and features of the present disclosure will be described in or apparent from the following description of exemplary embodiments of the present disclosure.

According to an aspect of the present disclosure, in a platform tape bonded to a platform part of a secondary battery, the platform part is produced by bonding one side of a case and has an electrode tab exposed from the platform part, the platform tape may include: an insulating tape cut to have a length corresponding to a length of the stage part to be placed in a length direction of the stage part; a double-sided adhesive tape adhered to one surface of the insulating tape in a length direction; an upper release paper attached to one surface of the insulating tape with the double-sided adhesive tape adhered thereto; and a lower release paper attached to the other surface of the insulating tape, wherein the area to which the upper release paper is attached and the area to which the lower release paper is attached do not overlap each other.

The other surface of the insulating tape may be attached to the platform part, and a double-sided adhesive tape may be disposed on a top surface of the platform part.

The insulating tape may have a width positioned perpendicular to a length direction of the land portion, which is generated at a region where the land portion is formed, equal to a sum of a length of the exposed electrode tab, a width of the land portion including a length of the step portion, and a height ranging from a top surface of the electrode tab to a top surface of the case.

The platform strip may further include a first bend line longitudinally positioned in phantom on the insulating strip and a second bend line spaced apart from the first bend line and longitudinally positioned in phantom on the insulating strip.

The first bending line may correspond to the bending portion a having a stepped portion generated at a region where the electrode tab and the land portion are engaged with each other, and the second bending line may correspond to a connection portion between the top surface of the land portion and the connection surface.

The double-sided adhesive tape may be disposed between the first bending line and the second bending line to be spaced apart from the bending portion of the insulating tape.

One side of the insulating tape may be wider than the other side in view of the portion where the double-sided tape is placed.

The upper release paper may cover the double-sided tape and the second bending line, and may be sized to have an end portion extending outwardly from the insulating tape.

According to another aspect of the present disclosure, a platform belt feeding device may include: a roll supporting unit rotatably supporting a platform tape roll having a platform tape wound thereon, the platform tape including an insulating tape, a double-sided tape attached to the insulating tape in a length direction, an upper release paper attached to one surface of the insulating tape, and a lower release paper attached to the other surface of the insulating tape; a release paper collecting unit rotatably installed in a developing direction of the platform belt and separating and collecting the lower release paper from the platform belt roll; a length adjusting unit rotatably installed in a developing direction of the platform band to be spaced apart from the release paper collecting unit and pushing the platform band into a length to be cut of the platform band; a driving motor coupled to the release paper collecting unit and rotating the release paper collecting unit; and a cutter installed adjacent to the length adjustment unit and cutting the flatbed tape, wherein the flatbed tape roll is wound in a state in which a region in which the upper release paper is attached and a region in which the lower release paper is attached are not overlapped with each other.

The release paper collecting unit and the length adjusting unit may be in the form of rotating rollers.

The release paper collecting unit and the length adjusting unit may support the platform belt from below and advance the platform belt.

The deck tape feeding device may further include a tape supporting unit disposed between the cutter and the length adjusting unit and supporting the deck tape from below.

As described above, the landing tape according to the embodiments of the present disclosure is directly adhered to the landing portion without punching the landing tape to match the landing tape with the electrode tab, thereby enhancing the attachment convenience.

In addition, according to the present disclosure, since the platform band having a shape corresponding to the minimum area where the insulating band is to be applied is manufactured and supplied, a separate process step is not required, and the platform band can be commonly used even when the secondary batteries have different shapes and sizes.

In addition, according to the deck tape feeding device of the present disclosure, since the lower release paper is automatically removed and the upper release paper is easily removed when the deck tape is supplied, the attachment convenience can be enhanced.

That is, embodiments of the present disclosure provide a platform band with enhanced attachment convenience and for general purpose use, and a feeding device for the platform band.

Drawings

Fig. 1 is a perspective view of a general secondary battery.

Fig. 2 is a plan view of an insulating tape bonded to the secondary battery shown in fig. 1.

Fig. 3 is a cross-sectional view of the insulating tape shown in fig. 2.

Fig. 4 is a perspective view illustrating an example configuration of the secondary battery shown in fig. 1.

Fig. 5 is a side view of the secondary battery shown in fig. 4.

Fig. 6 is a plan view comparatively showing an insulating tape and an adhesion region of the insulating tape according to an embodiment of the present disclosure.

Fig. 7 is an exploded perspective view illustrating a construction of a platform band according to an embodiment of the present disclosure.

Fig. 8 is a sectional view showing the configuration shown in fig. 7.

Fig. 9 is a plan view illustrating a top surface of the platform band illustrated in fig. 8.

Fig. 10 is a plan view illustrating a bottom surface of the platform band illustrated in fig. 8.

Fig. 11 is a schematic perspective view of a platform belt feeding device according to an embodiment of the present disclosure.

Fig. 12 is a schematic side view of the feeding device shown in fig. 11.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described in detail. The subject matter of the present disclosure may, however, be embodied in many different forms and should not be construed as limited to the example (or exemplary) embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will convey the aspects and features of the disclosure to those skilled in the art.

In addition, in the drawings, the size or thickness of various components is exaggerated for brevity and clarity. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, it will be understood that when element A is referred to as being "connected to" element B, element A can be directly connected to element B or intervening elements C may be present therebetween such that element A and element B are indirectly connected to each other.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, region, layer or section. Thus, for example, a first member, a first element, a first region, a first layer, and/or a first portion discussed below may be referred to as a second member, a second element, a second region, a second layer, and/or a second portion without departing from the teachings of the present disclosure.

Spatially relative terms, such as "under … …," "under … …," "lower," "over … …," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "on" or "over" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of above and below.

In describing the main components of the present disclosure, referring to fig. 1, upper and lower sides are defined as an upward direction and a downward direction, respectively. The long side direction of the case is defined as the longitudinal direction, and the short side direction of the case is defined as the width direction.

Fig. 1 is a perspective view of a general secondary battery. The external appearance of a general secondary battery is shown in fig. 1.

As shown in fig. 1, a general pouch-type secondary battery 10 includes an electrode assembly (not shown) accommodated in a case 12. The electrode tab electrically connected to the electrode assembly is withdrawn from the case 12. The stage portion 14 having the tab withdrawing portion 14a is located at one side of the case 12, and the electrode tab is withdrawn from the tab withdrawing portion 14 a.

A Protection Circuit Module (PCM) (not shown) is mounted on the top surface of the platform portion 14, and an insulation tape 30 is used to insulate the secondary battery 10 and the PCM from each other.

Fig. 2 is a plan view of an insulating tape bonded to the secondary battery shown in fig. 1. Fig. 3 is a cross-sectional view of the insulating tape shown in fig. 2.

As shown in fig. 2 and 3, the insulating tape 30 is supplied in the form of a platform tape, which is constructed by attaching a double-sided adhesive tape 50 to a tape made of an insulating material and then detachably attaching an upper release paper 70 and a lower release paper 90 to the top and bottom surfaces of the insulating tape 30. Before the PCM is mounted on the platform portion 14, the upper release paper 70 and the lower release paper 90 are removed, the bottom surface of the insulation tape 30 is attached to the platform portion 14, and then the upper release paper 70 is removed and the PCM is attached to the double-sided tape 50.

As shown in fig. 1, since the tab withdrawing portion 14a is provided in the land portion 14, once the insulating tape 30 is adhered to the land portion 14, a portion corresponding to the tab withdrawing portion 14a (which will be referred to as a punching area 32 hereinafter) needs to be removed by punching.

If the region corresponding to the tab withdrawing portion 14a is not punched, the insulating tape 30 may be wrinkled or may become weak, thereby deteriorating the adhesiveness and deteriorating the insulating performance. Therefore, as shown in fig. 2, the punched area 32 of the insulating tape 30 needs to be removed. In order to attach the insulating tape 30 to different types of secondary batteries, punched areas having different shapes are required, thereby reducing workability and increasing a case.

In addition, as shown in fig. 3, since the top and bottom surfaces of the insulating tape 30 are entirely covered with the upper and

lower release papers

70 and 90, the upper and

lower release papers

70 and 90 are not easily removed. In addition, during removal of the upper release paper 70 and the lower release paper 90, there is a high possibility that the insulating tape 30 is damaged.

To solve these problems, the platform band according to the embodiments of the present disclosure may be shaped as a general band to be compatible with different types of secondary batteries. Hereinafter, the platform band according to the present disclosure will be described in detail. In the following description, the term "landing tape" is used to refer to a tape to be adhered to a landing portion of a secondary battery, the tape including an insulating tape, a double-sided adhesive tape, and upper and lower release papers and being in a state in which the release papers have not been released.

Fig. 4 is a perspective view illustrating an example configuration of the secondary battery shown in fig. 1. Fig. 5 is a side view of the secondary battery shown in fig. 4. Fig. 6 is a plan view comparatively showing an insulating tape and an adhesion region of the insulating tape according to an embodiment of the present disclosure.

First, a general secondary battery will be described in more detail.

As shown in fig. 4 and 5, as described above, the pouch type secondary battery 100 includes the case 100, the platform part 130 provided at one side of the case 110, and the electrode tab 150 exposed to the outside of the case 110 through the platform part 130.

The case 110 includes a top surface 112, a bottom surface 114, a pair of first side surfaces 116 in the length direction, and a pair of second side surfaces 118 in the width direction of the case integrated into a box shape. One side second side surface 118a of housing 110 is bonded to create a platform portion 130.

For brevity, when one side of the platform portion 130 is defined as a front side, the second side surface 118 of the housing 110 may be divided into a forward facing second side surface 118a and a rearward facing second side surface 118b. The frontward facing second side surface 118a abuts against the platform portion 130, wherein the platform portion 130 is established by bonding and bending the bag, and then tightly connecting the bag with a connecting surface 134 to be described later. The frontward facing second side surface 118a is a surface bonded to the insulating tape 300 together with the land portion 130, which will be described in detail later.

The tab withdrawing portion 132 is disposed between the combined surfaces of the platform portion 130, and the electrode tab 150 is exposed to the outside of the case 110 through the tab withdrawing portion 132. As shown in fig. 5, the platform portion 130 is vertically bent from the top surface of the tab withdrawing portion 132 so as to have a connection surface 134 coupled to the second side surface 118 of the housing 110.

When a component such as PCM is mounted, the electrode tab 150, the top surface of the tab withdrawing portion 132, the connection surface 134, and the second side surface 118 closely contacting the connection surface 134 may be closely contacted with the component such as PCM. Accordingly, the insulation tape 300 (see fig. 6) serves to insulate between the secondary battery 100 and the PCM.

The tab withdrawing portion 132 and the electrode tab 150 and the connection surface 134 and the second side surface 118 are respectively brought into close contact with and engaged with each other, but a step is inevitably generated at their engagement due to the thickness difference.

As shown in fig. 5, stepped portions a, B are generated at points a and B, respectively. Point a is the joint portion between the tab withdrawing portion 132 and the electrode tab 150, and point B is the joint portion between the connection surface 134 and the frontward-directed second side surface 118 a. Since the thickness difference between the tab withdrawing portion 132 and the electrode tab 150 and the connection surface 134 has a predetermined thickness, stepped portions a, B are generated at points a and B, respectively. Accordingly, in attaching the insulating tape 300 to the land portion 130, the land tape is preferably constructed in consideration of such a stepped portion.

As shown in fig. 6, the insulating tape 300 has a predetermined length and width and is cut to supply a length required for a platform tape feeding device 800 to be described later. The insulating tape 300 is adhered to the entire platform part 130 including the tab withdrawing part 132 and the electrode tab 150. Accordingly, the insulating tape 300 may be configured to have a shape and size sufficient to cover the land portion 130 and the electrode tab 150.

As shown in fig. 5 and 6, the width (H2) of the insulating tape 300 may be the sum of the length (L1) of the exposed electrode tab 150, the width (L2) of the land portion 130 including the length of the step portions a, b, and the height (H1) ranging from the top surface of the electrode tab 150 to the top surface 112 of the case 110 (i.e., l1+l2+h1), as shown in fig. 5. Or the width (H2) of the insulating tape 300 may be greater than the sum (l1+l2+h1) because the portion to be insulated needs to be sufficiently covered by the insulating tape 300 when the electrode tab 150 is spread or when a gap is generated.

In addition, the first bending line 310 and the second bending line 330 may be located on the insulating tape 300. In fig. 5, the first bending line 310 is a line corresponding to the point a, and the second bending line 330 is a line corresponding to an angle C (a bending portion of the insulating tape when the insulating tape is attached) between the tab drawing portion 132 and the connection surface 134.

The first bending line 310 and the second bending line 330 may be printed on the insulating tape 300 or may be provided by a dotted line concave hollowed-out.

Since the double-sided tape 500 is used to adhere components (e.g., PCM), the double-sided tape 500 should be disposed on the top surface of the tab withdrawing portion 132 in the platform portion 130. For this, the first bending line 310 and the second bending line 330 guide the attachment position of the insulating tape 300. The double-sided adhesive tape 500 is placed between the first bending line 310 and the second bending line 330.

In view of the portion where the double-sided adhesive tape 500 is placed, one side of the insulating tape 300 is wider than the other side. The relatively wide side of the insulating tape 300 is defined as a first region 350, and the relatively narrow side of the insulating tape 300 is defined as a second region 370. The first region 350 is a portion placed at the connection surface 134 and the frontward second surface 118a, and the second region 370 is a portion placed at the electrode tab 150.

In the insulation tape 300 having the above-described configuration, the double-sided adhesive tape 500 is attached between the first bending line 310 and the second bending line 330. Since the double-sided tape 500 is required for the attachment of the PCM, the double-sided tape 500 should be disposed on the top surface of the platform portion 130. Accordingly, considering the configuration of the platform portion 130 and the position of the double-sided adhesive tape 500, the width of the insulation tape 300 and the positions of the first bending line 310 and the second bending line 330 may be determined.

The above-described insulating tape 300 is manufactured in the form of a platform tape T having an upper release paper 600 and a lower release paper 700 attached thereto in a state in which the double-sided adhesive tape 500 is attached thereto. Then, the resulting tape is wound in the form of a roll (hereinafter, will be referred to as a platform tape roll 300 a), and then supplied to a later process through the platform tape feeding device 800 as needed.

Hereinafter, various components of the platform tape T other than the insulating tape 300 will be described in more detail.

Fig. 7 is an exploded perspective view illustrating a construction of a platform band according to an embodiment of the present disclosure. Fig. 8 is a sectional view showing the configuration shown in fig. 7.

Referring to fig. 8, the platform tape T according to the embodiment of the present disclosure is constructed such that the double-sided adhesive tape 500 is attached to the insulation tape 300, and the upper release paper 600 and the lower release paper 700 are attached thereto.

As shown in fig. 6 to 8, the double-sided adhesive tape 500 is attached to the insulating tape 300 in the length direction of the insulating tape 300 and has a length corresponding to the length of the insulating tape 300. Specifically, the double-sided adhesive tape 500 is attached to one surface of the insulating tape 300 in the length direction of the insulating tape 300.

More specifically, the double-sided adhesive tape 500 is disposed between the first bending line 310 and the second bending line 330 to be spaced apart from the first bending line 310 and the second bending line 330 by preset distances L3 and L4, respectively. The preset distances L3 and L4 may be determined to be in a range between 0.1mm and 2mm (preferably, between 0.1mm and 1 mm).

Because the insulating tape 300 is bent at points a and B shown in fig. 5 when the platform portion 130 is attached, the double-sided adhesive tape 500 is spaced apart from the first and

second bending lines

310 and 330 by distances L3 and L4, respectively.

Referring again to fig. 5, since the electrode tab 150 is drawn out between the coupling surfaces of the land portions 130, a stepped portion a between the top surface of the electrode tab 150 and the top surface of the tab drawing portion 132 is generated at the point a. In addition, the insulating tape 300 is bent at an intersection point C ' of the dummy line a ' as an extension of the top surface of the tab extraction portion 132 and the dummy line B ' as an extension of the connection surface 134.

Depending on the manufacturing process of the land portion 130, the connection surface 134 may be connected to the tab extraction portion 132 so as to have a streamline shape like the shape of the angle C, or so that the shape of the image point C' intersects with the tab extraction portion 132. In the former case, the connection surface 134 and the connection portion of the tab withdrawing portion 132 may have a predetermined width. Here, the width of the angle C refers to the width of the range from the start point to the end point of the cross section generated when the dummy lines a 'and B' meet the streamline angle C.

The double-sided adhesive tape 500 is disposed to be spaced apart from the angle C when the connection surface 134 and the tab extraction portion 132 are connected to each other in a streamlined manner, compared to when the connection surface 134 and the tab extraction portion 132 are connected to each other so as to intersect each other. The double-sided adhesive tape 500 may be disposed adjacent to the point C' when the connection surface 134 and the tab drawing portion 132 intersect, as compared to when the connection surface 134 and the tab drawing portion 132 are connected to each other in a streamlined manner. For this, the width of the double-sided adhesive tape 500 is adjusted.

If the double-sided adhesive tape 500 is overlapped with the bent portion of the insulation tape 300, the overlapped portion may become thick or may have a rough surface. To avoid such a problem, as described above, the width of the double-sided adhesive tape 500 is determined in consideration of the shapes of the point C and the point C' corresponding to the curved portion. For example, the double-sided tape 500 is disposed on the tab withdrawing portion 132 and its width is determined so as not to overlap the bent portion of the insulating tape 300.

Before attaching the upper release paper 600 and the lower release paper 700, when winding the insulation tape 300 to provide the flatbed tape roll 300a, the top and bottom surfaces of the insulation tape 300 should not be adhered to each other. As shown in fig. 7 and 8, the upper release paper 600 is attached to the top surface of the insulating tape 300, and the lower release paper 700 is attached to the bottom surface of the insulating tape 300.

Fig. 9 is a plan view illustrating a top surface of the platform band illustrated in fig. 8. Fig. 10 is a plan view illustrating a bottom surface of the platform band illustrated in fig. 8.

As shown in fig. 8 and 9, the upper release paper 600 completely covers the double-sided adhesive tape 500 and the first region 350, and has a width sufficient to be partially exposed to the outside of the first region 350. In order to allow an operator to separate and release the upper release paper 600 from the insulating tape 300 with the insulating tape 300 attached to the platform part 130, the upper release paper 600 is preferably larger in size than the insulating tape 300. The first region 350 of the insulating tape 300 is disposed at one side of the connection surface 134 shown in fig. 6. Accordingly, if the upper release paper 600 has as many widths as the width protruding with respect to the first region 350 of the insulating tape 300 or as many widths as the width protruding upward with respect to the second side surface 118 of the housing 110 when the insulating tape 300 is adhered to the platform portion 130, the operator can easily remove the upper release paper 600.

However, the second region 370 of the top surface of the insulating tape 300 may not be covered by the upper release paper 600. Even if the second region 370 is not covered, the top and bottom surfaces of the insulation tape 300 can be prevented from sticking to each other when the insulation tape 300 is wound by providing the lower release paper 700. Accordingly, in order to allow the insulating tape 300 to be easily attached and in order to allow the upper release paper 600 to be easily removed, the upper release paper 600 has a size sufficient to cover the remaining portion of the insulating tape 300 except the second region 370 and to protrude to the outside of the insulating tape 300 by a preset width.

Referring to fig. 8, the protrusion width L5 of the upper release paper 600 protruding to the outside of the insulation tape 300 may be set in a range of 3mm to 5mm, which is determined in consideration of the average size of the operator's hand. The lower limit of the hand size (i.e., 3 mm) corresponds to the minimum width by which the operator can grasp the upper release paper 600 with his or her hand to tear the upper release paper 600. Since the upper release paper 600 has a predetermined thickness, the protruding portion of the upper release paper 600 may be loosened when the upper release paper 600 protrudes a predetermined length with respect to the insulating tape 300, thereby allowing an operator to easily remove the upper release paper 600 by grasping the protruding portion.

However, if the protrusion width L5 is greater than or equal to 5mm, the upper release paper 600 may descend toward the housing 110 due to its own weight in a state where the insulation tape 300 is attached, so that the protrusion is in close contact with the top surface 112 of the housing 110, making it difficult for an operator to grasp the protrusion. Accordingly, the protruding width L5 of the upper release paper 600 is appropriately set in a range between 3mm and 5 mm.

As shown in fig. 8 and 10, a lower release paper 700 is attached to the bottom surface of the insulating tape 300 to cover a portion of the insulating tape 300 not covered by the upper release paper 600. For example, the width of the lower release paper 700 may generally correspond to the width of the second region 370.

When the flatbed tape roll 300a is manufactured, the lower release paper 700 is wound in a state where it is attached to the insulating tape 300, and when the lower release paper 700 is unwound from the flatbed tape roll 300a, the release paper 700 is detached from the insulating tape 300. The lower release paper 700 is automatically removed from the platform band feeding device 800.

Hereinafter, the deck tape feeding device 800 will be described with reference to fig. 11 and 12. In the following description, the deck tape from which the release paper is removed will be referred to as a deck tape for brevity.

Fig. 11 is a schematic perspective view of a platform belt feeding device according to an embodiment of the present disclosure. Fig. 12 is a schematic side view of the feeding device shown in fig. 11.

As shown in fig. 11 and 12, the platform band feeding device 800 includes a roll supporting unit 810 supporting the platform band roll 300a, a release paper collecting unit 820 collecting the lower release paper 700 separated from the platform band roll 300a, a bottom supporting unit (or referred to as a length adjusting unit) 830 for supporting the insulation band 300 having the upper release paper 600 attached thereto, a driving motor 840 for driving the bottom supporting unit 830 and the release paper collecting unit 820, a band supporting unit 850 supporting the insulation band 300 when cutting the insulation band 300, and a cutter 860 cutting the insulation band 300. Although not shown, a cutter driver for driving the cutter 860 may be separately provided.

The roll supporting unit 810 is a cylindrical rotating rod rotatably supporting the platform strip roll 300 a. When the lower release paper 700 is removed by the release paper collecting unit 820, the platform band roll 300a is rotated and unwound. Thus, the roll supporting unit 810 may be provided in a free roll type without a separate driver.

The release paper collecting unit 820 is installed below the insulation tape 300 to be disposed at a side where the platform tape roll 300a is unwound. The release paper collecting unit 820 may be in the shape of a rotating roller rotated by the driving motor 840. When one end of the lower release paper 700 is fixed to one side of the outer circumferential surface of the release paper collecting unit 820, the release paper collecting unit 820 rotates to wind the lower release paper 700, thereby releasing the lower release paper 700 from the platen belt to collect the lower release paper 700. Since the release paper collecting unit 820 pulls the release paper 700 while rotating, the insulation tape 300 may automatically advance toward the cutter 860, and the platform tape roll 300a may be unwound. Here, the lower release paper 700 is collected by the release paper collecting unit 820, while the upper release paper 600 remains attached to the insulating tape 300.

Since the release paper collecting unit 820 is driven by the driving motor 840, the advancing of the insulating tape 300 is controlled as much as possible by adjusting the length of the lower release paper 700 to be cut.

The bottom support unit 830 supports the insulating tape 300 from below to prevent the insulating tape 300 from sagging as the insulating tape 300 advances toward the cutter 860. The bottom support unit 830 may be installed to be spaced apart from the release paper collecting unit 820 by a predetermined distance and adjacent to the belt support unit 850.

The bottom support unit 830 may be provided in a free-rolling type without a separate driver. Since the insulation tape 300 can advance toward the cutter 860 when the release paper collecting unit 820 rotates, it may not be necessary to provide a separate driver in the bottom supporting unit 830.

In addition, the bottom supporting unit 830 is in contact with the lower side of the insulation tape 300 having its adhesive surface exposed by removing the lower release paper 700, thereby supporting the insulation tape 300. Accordingly, the bottom support unit 830 may be made of a material (e.g., teflon) that is not adhesive with respect to the adhesive surface. The bottom support unit 830 may be made of a material having no tackiness with respect to the adhesive surface in part or all of the outer circumferential surface in contact with the insulating tape 300.

Meanwhile, a plurality of protrusions may be provided on the outer circumferential surface of the bottom support unit 830 to reduce the contact area with the insulation tape 300, thereby preventing the bottom support unit 830 from sticking to the insulation tape 300.

The tape supporting unit 850 is installed adjacent to the bottom supporting unit 830 and supports the insulating tape 300 from below. The tape supporting unit 850 has a top end parallel to the insulating tape 300. The cutter 860 is disposed adjacent to the front side of the tape supporting unit 850 along the conveying direction of the insulating tape 300.

The cutter 860 cuts the insulating tape 300 and is installed at the upper side of the insulating tape 300 to be able to ascend and descend. Cutter 860 is raised and lowered by a separate actuator (e.g., a hydraulic cylinder). If the insulation tape 300 is pushed as much as the length set by the bottom support unit 830, the cutter 860 is operated to cut the insulation tape 300.

The cutter 860 may be operated to cut the insulation tape 300 by a preset length according to the transmission time, or may be set to be operable when the insulation tape 300 has a length equal to the preset length by a separate sensor.

While the foregoing embodiments have been described to practice the platform belt of the present disclosure and feeding devices therefor, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the following claims.

Description of the reference numerals

100: secondary electrode 110: shell body

130: platform portion 150: electrode lug

300: insulating tape 310: first bending line

330: second bend line 350: first region

370: second region 500: double-sided adhesive tape

600: upper release paper 700: lower release paper

800: platform area material feeding unit

810: the roll supporting unit 820: release paper collecting unit

830: bottom support unit 840: driving motor

850: belt support unit 860: cutting device

Claims

1. A platform tape adhered to a platform part of a secondary battery, the platform part being produced by bonding one side of a case and having an electrode tab exposed from the platform part, the platform tape comprising:

an insulating tape cut to have a length corresponding to a length of the stage part to be placed in a length direction of the stage part;

a double-sided adhesive tape adhered to one surface of the insulating tape in a length direction;

an upper release paper attached to one surface of the insulating tape with the double-sided adhesive tape adhered thereto; and

a lower release paper attached to the other surface of the insulating tape,

wherein the area to which the upper release paper is attached and the area to which the lower release paper is attached are not overlapped with each other,

wherein the insulating tape is positioned such that a width perpendicular to a length direction of the land portion is equal to a sum of a length of the exposed electrode tab, a width of the land portion including a length of the step portion, which is generated at a region where the land portion is formed, and a height of a range from a top surface of the electrode tab to a top surface of the case,

wherein the platform strip further comprises a first bending line longitudinally positioned in phantom on the insulating strip and a second bending line spaced apart from the first bending line and longitudinally positioned in phantom on the insulating strip, an

Wherein the first bending line corresponds to a bending portion having a stepped portion, which is generated at a region where the electrode tab and the land portion are joined to each other, and the second bending line corresponds to a connection portion between a top surface of the land portion and a connection surface of the land portion, and wherein the connection surface of the land portion is a surface of the land portion bonded to the case.

2. The platform tape according to claim 1, wherein the other surface of the insulating tape is attached to the platform portion, and the double-sided adhesive tape is disposed on a top surface of the platform portion.

3. The platform tape according to claim 1, wherein the double-sided tape is disposed between the first bend line and the second bend line to be spaced apart from the bend portion of the insulating tape.

4. A platform tape according to claim 3, wherein one side of the insulating tape is wider than the other in view of the portion where the double-sided tape is placed.

5. A platform strip according to claim 3 wherein the upper release paper covers the double sided adhesive tape and the second bend line and is sized to have an end extending outwardly from the insulating strip.