Flexible printed circuit board bending device for battery cell and bending method using the same

Abstract

Disclosed are a flexible printed circuit board bending device for a battery cell and a bending method using the flexible printed circuit board bending device. More specifically, the present invention relates to such a flexible printed circuit board bending device for a battery cell and a bending method using the flexible printed circuit board bending device. The flexible printed circuit board bending device comprises: a mold (300) comprising a horizontal body (310) and a support wall (320), the support wall being configured to accommodate a battery cell (100), the battery cell (100) having a flexible printed circuit board exposed outwardly from one side thereof. A flexible printed circuit board (110); a bending guide unit (400) located on one side of the mold (300); and a bending unit (500) located on one side of the mold (300), wherein the bending unit (500) comprises: a stationary body (510); a rotating body (530) connected to the stationary body (510), the rotating body being configured to be able to rotate by a predetermined angle; and a board placement portion (520) connected to the rotating body (530), the board placement portion being formed with a board placement groove (521) configured to accommodate the flexible printed circuit board (110).

Description

Technical Field

[0001] This application claims the benefit of priority to Korean Patent Application No. 2019-0144758, filed on November 13, 2019, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a flexible printed circuit board bending device for a battery cell and a bending method using the same, and more particularly to a flexible printed circuit board bending device capable of accurately and quickly bending a battery cell and a bending method using the same. Background Art

[0003] With the technological development of mobile devices such as mobile phones, laptops, camcorders and digital cameras and the increase in demand for them, secondary batteries that can be charged and discharged have been actively studied. In addition, secondary batteries as energy sources to replace fossil fuels that cause air pollution have been applied to electric vehicles (EVs), hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (P-HEVs), so there is an increasing need to develop secondary batteries.

[0004] As secondary batteries currently available on the market, there are nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and lithium secondary batteries. Among them, lithium secondary batteries have attracted attention because they have almost no memory effect compared to nickel-based secondary batteries, and thus lithium secondary batteries can be charged and discharged freely, have a very low self-discharge rate and have a high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. The lithium secondary battery includes: an electrode assembly in which a positive electrode plate applied with a positive electrode active material and a negative electrode plate applied with a negative electrode active material are arranged with a separator interposed therebetween; and an outer shell member, i.e., a battery case, configured to contain the electrode assembly together with an electrolyte in an airtight state.

[0006] Based on the shape of the battery case, secondary batteries are classified into cylindrical batteries having an electrode assembly mounted in a cylindrical metal can, prismatic batteries having an electrode assembly mounted in a prismatic metal can, or pouch batteries having an electrode assembly mounted in a pouch-shaped case made of an aluminum laminate sheet.

[0007] in addition, Figure 11 is a schematic diagram of a battery cell 100 before the flexible printed circuit board 110 is bent. The flexible printed circuit board (FPCB) 110 is a circuit board including a flexible and bendable metal foil (particularly, a copper foil) and a flexible film formed as an outer layer. Generally, the flexible printed circuit board 110 is mounted to the battery cell 100 in order to send and receive power and signals.

[0008] As described above, when the flexible printed circuit board (FPCB) 110 is mounted to the battery unit 100, the shape of the connection terminal can be changed more freely, thereby improving the use and space utilization of the battery unit. However, the flexible printed circuit board (FPCB) needs to be bent at various angles according to the type of device and the installation environment.

[0009] In this regard, patent document 1 discloses a clamp device for a battery cell, which includes: a clamp body, the clamp body having a placement portion, and the battery cell is placed in the placement portion with a printed circuit board (PCB) exposed on the other side thereof; a fixing member arranged on one side of the clamp body, the fixing member being configured to fix the battery cell placed in the placement portion; and a folding member rotatably arranged on the other side of the clamp body, the folding member being configured to press the PCB exposed from the placement portion when rotated, so that the PCB is folded and thus positioned on the battery cell.

[0010] Patent document 1 has the advantage that the printed circuit board (PCB) is folded, thereby ensuring the fastening force between the system and the battery, but has the following problems: since the flexibility of the printed circuit board (PCB) is lower than that of the flexible printed circuit board (FPCB), folding is limited; space utilization is low and efficiency is not high; and there is an additional cost related to the energy required for folding.

[0011] (Prior art literature)

[0012] (Patent Document 1) Korean Patent Application Publication No. 2015-0141810 Summary of the invention

[0013] Technical issues

[0014] The present invention has been made in view of the above problems, and an object of the present invention is to provide a bending apparatus capable of accurately bending a flexible printed circuit board of a battery cell and a bending method using the bending apparatus.

[0015] Another object of the present invention is to provide a bending device capable of bending a flexible printed circuit board of a battery cell at a relatively low cost and a bending method using the bending device.

[0016] Another object of the present invention is to provide a bending device capable of ensuring the fastening force between a system and a battery and a bending method using the bending device.

[0017] Technical Solution

[0018] In order to achieve the above-mentioned purpose, the present invention provides a flexible printed circuit board bending device for a battery cell, the flexible printed circuit board bending device comprising: a mold 300, the mold 300 comprising a horizontal body 310 and a support wall 320, the support wall 320 being configured to accommodate a battery cell 100, the battery cell 100 having a flexible printed circuit board 110 exposed outwardly from one side of the battery cell 100; a bending guide unit 400 located on one side of the mold 300; and a bending unit 500 located on the one side of the mold 300, wherein the bending unit 500 comprises: a stationary body 510; a rotating body 530 connected to the stationary body 510, the rotating body 530 being configured to be able to rotate by a predetermined angle; and a board placement portion 520 connected to the rotating body 530, the board placement portion 520 being formed with a board placement groove 521 configured to accommodate the flexible printed circuit board 110.

[0019] In addition, in the bending device according to the present invention, the bending guide unit 400 may include: a first support member 410, the first support member 410 having a side surface inclined at a predetermined angle; a first auxiliary support member 420, the first auxiliary support member 420 is fixed to a surface of the first support member 410; and a first movable portion 430, the first movable portion 430 is configured to be able to move along the inclined one side surface of the first support member 410, and wherein a first pushing portion 431 is provided on a surface of the first movable portion 430, and the first pushing portion 431 is configured to support a predetermined area of ​​the flexible printed circuit board 110.

[0020] In addition, in the bending apparatus according to the present invention, the bending guide unit 400 further includes a first elastic member 440 configured to connect the first auxiliary supporting member 420 and the first moving portion 430 to each other.

[0021] In addition, the bending device according to the present invention may further include a pressing unit 600 located on one side of the mold 300, wherein the pressing unit 600 may include: a second supporting member 610; a second auxiliary supporting member 620, the second auxiliary supporting member 620 is fixed to a side surface of the second supporting member 610; and a second moving part 630, the second moving part 630 is configured to be able to move in a vertical direction, and the second moving part 630 may be provided with a second pushing part 631, the second pushing part 631 is configured to press the bending part of the flexible printed circuit board 110.

[0022] In addition, in the bending device according to the present invention, a protruding portion 631 ′ is provided at one end of the second pushing portion 631 .

[0023] Furthermore, in the bending apparatus according to the present invention, the mold 300 may be provided with a third space portion S3 formed in a predetermined shape by a cutout, the third space portion being configured to allow easy placement and removal of the battery cell 100 .

[0024] In addition, in the bending apparatus according to the present invention, a second space portion S2 formed in a predetermined shape by a cutout may be provided at one side of the mold 300 .

[0025] Furthermore, in the bending apparatus according to the present invention, the plate seating portion 520 may be located in the second space portion S2.

[0026] In addition, the bending apparatus according to the present invention may further include a support base 200 configured to space the mold 300 from the ground by a predetermined height and fix the bending guide unit 400 and the bending unit 500 , wherein the support base may be located below the mold 300 .

[0027] Furthermore, in the bending apparatus according to the present invention, the support base 200 may be provided with a first space portion S1 formed in a predetermined shape by a cutout, the first space portion being configured to allow easy placement and removal of the battery cell 100 .

[0028] In addition, in the bending device according to the present invention, the first pushing portion 431 may have a quadrilateral horizontal cross section, and the cross section is parallel to the flexible printed circuit board 110 .

[0029] In addition, the present invention provides a bending method using the above-mentioned flexible printed circuit board bending device for a battery cell, the bending method comprising: a first step of placing the battery cell 100 on the mold 300; a second step of making one end of the first pushing portion 431 of the bending guide unit 400 in close contact with the flexible printed circuit board 110; and a third step of rotating the board placement portion 520 of the bending unit 500 by a predetermined angle so as to be in close contact with one side surface of the first pushing portion 431.

[0030] In addition, the bending method according to the present invention may further include: a fourth step of moving the first pushing portion 431 of the bending guide unit 400 that is in close contact with the flexible printed circuit board 110 to its original position; and a fifth step of rotating the board placing portion 520 of the bending unit 500 by a predetermined angle so as to be in close contact with the upper surface of the mold 300.

[0031] In addition, the bending method according to the present invention may further include a sixth step of moving the second pushing portion 631 of the second moving portion 630 to press the bent portion of the flexible printed circuit board 110 .

[0032] Beneficial Effects

[0033] The flexible printed circuit board bending apparatus for a battery cell according to the present invention includes a bending guide unit and a bending unit, whereby bending can be performed at a precise position.

[0034] In addition, the flexible printed circuit board bending apparatus for a battery cell according to the present invention further includes a pressing unit, thereby preventing a spring-back phenomenon.

[0035] Furthermore, in the flexible printed circuit board bending apparatus for a battery cell according to the present invention, bending is performed at a mold configured to fix the battery cell, whereby a defect rate can be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of a battery cell before the flexible printed circuit board is bent.

[0037] Figure 2 is a perspective view of a flexible printed circuit board bending apparatus for a battery cell according to the present invention.

[0038] Figure 3 yes Figure 2 An enlarged perspective view of a bending guide unit of a bending device shown in FIG.

[0039] Figure 4 yes Figure 2 An enlarged perspective view of a bending unit of a bending device shown in FIG.

[0040] Figure 5 yes Figure 2 An enlarged perspective view of a pressing unit of a bending device is shown in FIG.

[0041] Figures 6 to 11 is a flow chart illustrating a method of bending a flexible printed circuit board using a bending apparatus according to the present invention.

[0042] Fig.12 is a schematic diagram of an inspection fixture configured to inspect bent battery cells. DETAILED DESCRIPTION

[0043] In the present application, it should be understood that the terms "including", "having", "comprising", etc. indicate the existence of the stated features, quantities, steps, operations, elements, parts or combinations thereof, but do not exclude the existence or addition of one or more other features, quantities, steps, operations, elements, parts or combinations thereof.

[0044] In addition, the same reference numerals will be used throughout the drawings to represent parts that perform similar functions or operations. In the case of a part being connected to another part in the present application, it can be not only that the part is directly connected to the other part, but also that the part can be indirectly connected to the other part via another part. In addition, including a certain element does not mean excluding other elements, but means that other elements may be further included, unless otherwise specified.

[0045] Hereinafter, a flexible printed circuit board bending apparatus for a battery cell according to the present invention will be described.

[0046] Figure 2 is a perspective view of a flexible printed circuit board bending device for a battery cell according to the present invention. Figure 2 According to the present invention, the flexible printed circuit board bending device for the battery cell may include: a supporting base 200; a mold 300, the battery cell 100 is placed on the mold 300; a bending guide unit 400, the bending guide unit 400 is configured to maintain the bending position of the flexible printed circuit board 110; a bending unit 500, the bending unit 500 is configured to rotate the flexible printed circuit board 110 to the bending position; and a pressing unit 600, the pressing unit 600 is configured to press the bent portion of the flexible printed circuit board 110.

[0047] First, the support base 200 will be described. The support base is configured to space the mold 300 from the ground by a predetermined height and fix the bending guide unit 400, the bending unit 500, and the pressing unit 600. The support base is located below the mold 300.

[0048] When viewed from above (along the Z-axis direction), the support base is substantially rectangular. A first space portion S1 is formed on one side of the support base by a first cutout portion 220, and a protrusion 210 is provided toward a stationary body 510 described later. A second space portion S2 is formed near the protrusion 210 by a second cutout portion 230.

[0049] Here, the first space portion S1 is configured to make it easy for a worker's hand to hold the battery cell 100 when the battery cell 100 is mounted on or removed from the mold 300, and the second space portion S2 is configured to ensure a rotation space of a board mounting portion 520 described later.

[0050] The mold 300 providing a seating space for the battery cell 100 is disposed along the upper portion of the support base 200, more specifically, along the second space portion S2 of the support base 200. The mold includes a flat horizontal body 310, and a support wall 320 extending upward by a predetermined height along an edge of the horizontal body 310, the support wall being configured to restrict left and right movement of the battery cell 100 after the battery cell 100 is seated.

[0051] In addition, a third space portion S3 is formed on one side of the horizontal body 310, specifically, above the first space portion S1 of the support base 200 by a third cutout portion 311 and a pair of fourth cutout portions 312 disposed to face each other. Similar to the first space portion S1 described above, the third space portion S3 is configured to easily place and remove the battery unit 100.

[0052] The support wall 320 may be composed of a first support wall 321 , a second support wall 322 , a third support wall 323 , and a fourth support wall 324 configured to support four sides of the battery cell 100 .

[0053] Next, the bending guide unit will be described. Figure 3 yes Figure 2 An enlarged perspective view of a bending guide unit of a bending device shown in FIG.

[0054] Will refer to Figure 2 and Figure 3 The bending guide unit 400 is described. The bending guide unit 400 may include a first supporting member 410 , a first auxiliary supporting member 420 , a first moving portion 430 , a first elastic member 440 , and a first moving device 450 .

[0055] The first supporting member 410 is formed to have a substantially triangular shape, and one side surface of the first supporting member 410 is inclined so that the first moving portion 430 can move in a state of being inclined at a predetermined angle. The first auxiliary supporting member 420 is elongatedly extended in a state of being fixed to one surface of the first supporting member 410 by a fixing device (not shown).

[0056] The first moving portion 430 moves along the inclined surface of the first supporting member 410. At this time, the first moving portion 430 may be smoothly moved without deviating from a predetermined path by the first moving device 450 configured to have a structure such as a sliding structure.

[0057] The first pushing portion 431 is connected to one side surface of the first moving portion 430 in an inclined state. The lower end of the first pushing portion 431 is parallel to the ground in a sharp blade shape with an acute angle so as to support a predetermined area of ​​the flexible printed circuit board 110 to be described later.

[0058] Here, the reason why the first supporting member 410 is inclined at a predetermined angle is to facilitate the operation of moving the first moving portion 430 configured to push a predetermined area of ​​the flexible printed circuit board 110 in an inclined state.

[0059] The first elastic member 440 connecting the first moving portion 430 and the first auxiliary supporting member 420 to each other is configured to assist movement of the first moving portion 430. When the force applied to the first urging portion 431 is released, the first moving portion 430 returns to its original position by the elastic force of the first elastic member 440.

[0060] Here, the first elastic member 440 is preferably a spring. However, the present invention is not limited thereto as long as the first elastic member has a force sufficient to return the first moving portion 430 to its original position.

[0061] Figure 4 yes Figure 2 An enlarged perspective view of a bending unit of a bending apparatus shown in FIG. Figure 2 and Figure 4 Describes the bending element.

[0062] The bending unit 500 configured to bend the flexible printed circuit board 110 exposed from the battery cell 100 includes a stationary body 510 , a board seating portion 520 , a rotating body 530 , a handle 540 , and a rotating shaft 550 .

[0063] The stationary body 510 is used to support the plate placement part 520, the rotating body 530, the handle 540 and the rotating shaft 550, so that the above components can be operated in a state of being organically connected to each other. A passage for the rotating shaft 550 to extend is provided at a predetermined position of the stationary body.

[0064] The board seating part 520 is rotatably coupled to the stationary body 510 in a state of being connected to one side of the rotating shaft 550, and is located in the second space portion S2 between the protrusion 210 of the support base 200 and the mold 300. The board seating part 520 is provided with a board seating groove 521 hollowed out to a predetermined depth so that the flexible printed circuit board 110 connected to the battery cell 100 is seated therein.

[0065] The rotating body 530 is configured to rotate the plate placement portion 520 by a predetermined angle. The other side of the rotating shaft 550 is connected to one side of the rotating body. In addition, a handle 540 configured to be held by hand is attached to the rotating body so that the rotating body can be easily rotated. Of course, as described above, the rotating shaft 550 extends through the stationary body 510.

[0066] Figure 5 yes Figure 2 An enlarged perspective view of the pressing unit of the bending device shown in FIG. Figure 2 and Figure 5 , the pressing unit 600 may include a second supporting member 610 , a second auxiliary supporting member 620 , a second moving portion 630 , a second elastic member 640 , and a second moving device 650 .

[0067] The second support member 610 is fixed to one side of the support base 200 and may be a vertical rod or an L-shaped rod.

[0068] The second auxiliary support member 620 is elongated while being fixed to one side surface of the second support member 610 by a fixing device (not shown). The second auxiliary support member 620 is disposed perpendicular to the ground so that the second moving part 630 can move in a vertical direction.

[0069] In addition, the second moving device 650 configured to have a structure such as a sliding structure is located between the second supporting member 610 and the second moving portion 630. As a result, the second moving portion 630 can be smoothly moved up and down without deviating from a predetermined path.

[0070] The second pushing portion 631 is connected to one side surface of the second moving portion 630. A The protrusion 631' is configured to more reliably bend the bent portion of the flexible printed circuit board 110, and a more detailed description thereof will be given below.

[0071] The second elastic member 640 connecting the second moving portion 630 and the second auxiliary supporting member 620 to each other is configured to assist movement of the second moving portion 630. When the force applied to the second urging portion 631 is released, the second moving portion returns to its original position by the elastic force of the second elastic member 640.

[0072] Here, the second elastic member 640 is preferably a spring. However, the present invention is not limited thereto as long as the second elastic member has a force sufficient to return the second moving portion 630 to its original position.

[0073] Figures 6 to 11 is a flow chart illustrating a method of bending a flexible printed circuit board using a bending apparatus according to the present invention.

[0074] Will refer to Figures 6 to 11 A method of bending a flexible printed circuit board of a battery cell is described.

[0075] The bending method according to the present invention includes: a first step of placing the battery cell 100 on the mold 300; a second step of making one end of the first pushing portion 431 of the bending guide unit 400 in close contact with the flexible printed circuit board 110; a third step of rotating the board placement portion 520 of the bending unit 500 by a predetermined angle so as to be in close contact with one side surface of the first pushing portion 431; a fourth step of moving the first pushing portion 431 of the bending guide unit 400 in close contact with the flexible printed circuit board 110 to its original position; a fifth step of rotating the board placement portion 520 of the bending unit 500 by a predetermined angle so as to be in close contact with the upper surface of the mold 300; and a sixth step of moving the second pushing portion 631 of the second moving portion 630 to press the bent portion of the flexible printed circuit board 110.

[0076] First, refer to Figure 6 The first step is described in more detail. The first step is a step of seating the battery cell 100 on the horizontal body 310 of the mold 300 and seating the flexible printed circuit board 110 in the board seating groove 521. Due to the first space portion S1 of the support base 200 and the third space portion S3 of the mold 300, the battery cell 100 can be easily seated.

[0077] Will refer to Figure 7 The second step is described. The first moving portion 430 of the bending guide unit 400 moves downward in an inclined state so that the blade-shaped end of the first pushing portion 431 is in close contact with the flexible printed circuit board 110. This step is performed so that the flexible printed circuit board 110 is folded at its correct position.

[0078] then, Figure 8is a diagram illustrating the third step. In the third step, in a state where the flexible printed circuit board 110 is pushed by the end of the first pushing portion 431, the handle 540 of the bending unit 500 is rotated until the board seating portion 520 is in close contact with the first pushing portion 431. As a result, the flexible printed circuit board 110 is preliminarily folded at a predetermined angle.

[0079] Fig. 9 4 is a diagram illustrating the fourth step. The fourth step is a step of moving the first moving portion 430 of the bending guide unit 400 to its original position. When the force applied to the first moving portion 430 or the first pushing portion 431 is released, the first moving portion 430 returns to its original position through the first elastic member 440.

[0080] Will refer to Fig.10 The fifth step is described. The handle 540 of the bending unit 500 is further rotated until the board seating portion 520 is no longer rotated, that is, until the flexible printed circuit board 110 is completely folded so that the opposing portions thereof contact each other.

[0081] Fig.11 6 is a diagram illustrating the sixth step, which is a step of pressing the bent portion of the flexible printed circuit board 110 formed as a result of folding again, thereby minimizing the springback phenomenon, that is, the phenomenon that the flexible printed circuit board returns to its original state. The second pushing portion 631 of the pressing unit 600 moves downward to press the bent portion of the flexible printed circuit board 110 formed as a result of folding. At this time, The shaped protrusion 631' accurately presses the bent portion.

[0082] After the above steps, the battery cell 100 mounted in the mold 300 is withdrawn.

[0083] Fig.12 is a schematic diagram of an inspection jig configured to inspect a bent battery cell. The battery cell 100 having a bent flexible printed circuit board 110 may be mounted in an inspection jig 700 having a flexible printed circuit board receiving groove 710 to inspect for bending defects, such as Fig.12 as shown in .

[0084] Although the present invention has been described in detail, it will be appreciated by those skilled in the art that its detailed description only discloses the preferred embodiments of the present invention and therefore does not limit the scope of the present invention. Therefore, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the scope and technical concept of the present invention, and it will be apparent that such changes and modifications fall within the scope of the appended claims.

[0085] (Explanation of reference numbers)

[0086] 100: Battery Cell

[0087] 110: Flexible printed circuit board

[0088] 200: Support base

[0089] 210: protrusion 220: first cutout

[0090] 300: Mould

[0091] 310: Horizontal body

[0092] 311: third cutout 312: fourth cutout

[0093] 320: Support wall

[0094] 321: first support wall 322: second support wall

[0095] 323: third support wall 324: fourth support wall

[0096] 400: Bending guide unit

[0097] 410: First supporting member

[0098] 420: First auxiliary support member

[0099] 430: first moving part 431: first pushing part

[0100] 440: first elastic member 450: first moving device

[0101] 500: Bending unit

[0102] 510: Still body

[0103] 520: board placement portion 521: board placement groove

[0104] 530: Rotating body 540: Handle

[0105] 550: Rotation axis

[0106] 600: Pressing unit

[0107] 610: Second supporting member

[0108] 620: Second auxiliary support member

[0109] 630: Second moving part

[0110] 631: second pushing portion 631': protruding portion

[0111] 640: second elastic member 650: second moving device

[0112] 700: Check fixture

[0113] 710: Flexible printed circuit board receiving groove 710

[0114] S1: first space part S2: second space part

[0115] S3: The third space part.

Claims

1. A flexible printed circuit board bending device for a battery cell, the flexible printed circuit board bending device comprising: a mold including a horizontal body and a support wall configured to accommodate a battery cell having a flexible printed circuit board exposed outwardly from one side of the battery cell; a bending guide unit located on one side of the mold; a pressing unit located at one side of the mold; and A bending unit located on one side of the mold, wherein The bending unit includes: a stationary body; a rotating body connected to the stationary body, the rotating body being configured to be able to rotate by a predetermined angle; and a board placement portion connected to the rotating body, the board placement portion having a board placement groove configured to accommodate the flexible printed circuit board formed therein, wherein the pressing unit comprises: a second supporting member; a second auxiliary supporting member, the second auxiliary supporting member being fixed to one side surface of the second supporting member; and a second moving portion, the second moving portion being configured to be movable in a vertical direction, and The second moving portion is provided with a second pushing portion, and the second pushing portion is configured to press the bent portion of the flexible printed circuit board. Wherein, a " "-shaped cross-section.

2. The flexible printed circuit board bending device according to claim 1, wherein The bending guide unit comprises: a first supporting member having one side surface inclined at a predetermined angle; a first auxiliary supporting member fixed to one surface of the first supporting member; and a first moving portion configured to be movable along the inclined one side surface of the first supporting member, and A first pushing portion is disposed on one surface of the first moving portion, and the first pushing portion is configured to support a predetermined area of ​​the flexible printed circuit board. 3 . The flexible printed circuit board bending apparatus of claim 2 , wherein the bending guide unit further comprises a first elastic member configured to connect the first auxiliary supporting member and the first moving portion to each other. 4 . The flexible printed circuit board bending apparatus according to claim 1 , wherein the mold is provided with a third space portion formed in a predetermined shape by a cutout, the third space portion being configured to allow easy placement and removal of the battery cell. 5 . The flexible printed circuit board bending apparatus according to claim 4 , wherein a second space portion formed in a predetermined shape by a cutout is provided at one side of the mold. 6 . The flexible printed circuit board bending apparatus according to claim 5 , wherein the board seating portion is located in the second space portion.

7. The flexible printed circuit board bending device according to claim 1, further comprising: A support base is configured to space the mold from the ground by a predetermined height and to fix the bending guide unit and the bending unit, wherein The supporting base is located below the mold. 8 . The flexible printed circuit board bending apparatus according to claim 7 , wherein the support base is provided with a first space portion formed in a predetermined shape by a cutout, the first space portion being configured to allow easy placement and removal of the battery unit. 9 . The flexible printed circuit board bending apparatus according to claim 2 , wherein the first pushing portion has a quadrilateral horizontal cross section, and the cross section is parallel to the flexible printed circuit board.

10. A method for bending a flexible printed circuit board for a battery cell using the flexible printed circuit board bending apparatus according to any one of claims 1 to 9, the method comprising: The first step is to place the battery cell on the mold; The second step is to make one end of the first pushing portion of the bending guide unit closely contact with the flexible printed circuit board; The third step is to rotate the plate placing portion of the bending unit by a predetermined angle so as to be in close contact with a side surface of the first pushing portion; The fourth step is to move the first pushing portion of the bending guide unit that is in close contact with the flexible printed circuit board to its original position; The fifth step is to rotate the plate placement portion of the bending unit by a predetermined angle so as to be in close contact with the upper surface of the mold; In a sixth step, the second pushing portion of the second moving portion is moved to press the bent portion of the flexible printed circuit board.

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