KR101020186B1 - Apparatus for manufacturing lithium secondary battery - Google Patents

Abstract

In the lithium secondary battery manufacturing apparatus according to the present invention, after attaching the positive electrode plate and the negative electrode plate on both sides of the separator one by one, the positive electrode plate and the negative electrode plate while moving the separator attached to the Z-shaped folding the large-capacity lithium secondary battery made of a large size plate It is characterized by being suitable for manufacture.

Lithium Secondary Battery, Plate, Separator

Description

Lithium secondary battery manufacturing apparatus {Apparatus for manufacturing lithium secondary battery}

The present invention relates to a lithium secondary battery manufacturing apparatus, and more specifically, after attaching the positive electrode plate and the negative electrode plate one by one on both sides of the separator, while moving the separator with the positive electrode plate and the negative electrode plate is folded in a Z-shape to a large size plate The present invention relates to a lithium secondary battery manufacturing apparatus suitable for producing a large capacity lithium secondary battery.

In general, lithium secondary batteries replace nickel-cadmium batteries, nickel hydride batteries, etc., due to their lightness and high energy storage density, and are widely used in electric vehicles, hybrid vehicles, electric motors, and electric bicycles.

In order to manufacture the lithium secondary battery, as shown in FIGS. 1 and 2, the positive electrode plate 1 and the negative electrode plate 2 are adhered to both sides of the separator S, and then folded in a Z shape.

The present applicant has invented such a lithium secondary battery manufacturing apparatus has been granted the Republic of Korea Patent Nos. 10-0388648, 10-0388649, 10-0388650, and the like.

The manufacturing apparatus comprises a supply unit for supplying the separator (S), an adhesive coating unit for applying an adhesive on both sides of the separator (S) in a predetermined pattern, and a positive electrode (1) on one side of the separator (S), On the other side of the separator (S), a lamination unit for adhering the negative electrode plate (2) at the same time, 'multiple' positive electrode plate (1) and negative electrode plate (2) at the same time, the positive electrode plate (1) and the negative electrode plate (2) It is provided with a packing unit for folding the attached separator (S) in the Z-shape.

The lamination unit attaches a plurality of positive / cathode plates 1 and 2 to the separator S at one time. The separator S to which the positive / cathode plates 1 and 2 are attached is folded in a Z-shape by the packing unit, and then cut into units of one batch.

The packing unit folds the separator using air injected from the air nozzle, and then folds the separator in a Z shape by pressing the separator from above using a folder plate.

As such, the manufacturing apparatus has an advantage of increasing production efficiency by automating a manufacturing process of a lithium secondary battery.

However, the manufacturing apparatus is effective in producing a lithium secondary battery consisting of a small electrode plate of a small size, for example, 106mm × 100mm, but a lithium secondary battery of a large electrode plate, for example, 460mm × 330mm Not suitable for When the pole plates 1 and 2 are enlarged, the size of the packing unit must be increased in order to fold the separator S to which the positive / negative plate plates 1 and 2 are bonded in a Z shape, which is not economical. Therefore, there is a need for a manufacturing apparatus that can be efficiently used in the production of a lithium secondary battery made of a large electrode plate.

An object of the present invention is to provide a manufacturing apparatus that can efficiently produce a lithium secondary battery made of a large electrode plate.

In order to achieve the above object, a lithium secondary battery manufacturing apparatus according to a preferred embodiment of the present invention, a supply unit for supplying a separator; A lamination unit attaching a positive electrode plate to one side of both sides of the separator moved from the supply unit and a negative electrode plate to the other side of the both sides, the positive electrode plate and the negative electrode plate corresponding to each other; And a packing unit for folding and packing a separator with a positive / negative plate in a Z-shape such that the positive electrode plate and the negative electrode plate are alternately stacked, wherein the packing unit reciprocates between the lamination unit and the pressing unit, and the positive / negative plate A moving part that is folded in a Z shape while moving the attached separator by one pitch to the pressing part; And the pressing unit for pressing and fixing the positive / negative plate from the upper side, wherein the separator with the positive / negative plate is folded in a Z shape while being moved to the pressing unit by one pitch by the moving unit to stack the positive / negative plate. The pressing unit periodically repeats the rising and falling, so that one pitch is the distance P between the positive electrode plate and the positive electrode plate.

Preferably, the lamination unit attaches one positive electrode plate and one negative electrode plate to correspond to both sides of the separator, and then moves the one positive / negative plate to the pressing unit while folding the separator in a Z-shape to stack the positive / negative plate.

Here, the pressing unit includes a main pressing unit for pressing the center of the stacked positive / cathode plates; And an auxiliary pressurizing portion pressurizing the edge of the positive / negative plate, wherein when the separator with the positive / negative plate is moved to the pressurizing portion by the moving portion, the main pressurizing portion rises upward and the auxiliary pressurizing portion presses the positive / negative plate. Maintaining the pressurized state, after the main pressurizing portion rises upward, the moving part moves to fold the separator in the Z shape, and after the separator is folded in the Z shape, the main pressurizing portion descends to press the center of the positive / negative plate, It is preferable that the auxiliary pressing unit retreats backward to release the pressure on the positive / negative plate and then ascends and then advances above the edge, and then descends to the positive / negative plate to press the edges of the newly stacked positive / negative plate.

Preferably, the moving part comprises: a clamping member for selectively gripping a positive / negative plate attached to the separator; And a moving member for moving the clamping member to the pressing part after the clamping member grips the positive / negative plate.

More preferably, the manufacturing apparatus includes a cutting unit which is installed between the lamination unit and the pressing unit and cuts the separator after the batch of the positive / negative plate is completed.

More preferably, the pressing portion includes a supporting plate for supporting the laminated positive / cathode plates, and the supporting plate is formed by a predetermined interval when the separator is moved to the pressing portion so that the moving portion easily moves the separator with the positive / negative plate attached to the pressing portion. Move down.

Preferably, the manufacturing apparatus includes a transfer unit, wherein the transfer unit grips one batch of positive / cathode plates which have been laminated by a packing unit, moves them to the holder unit, and then rotates the separator to move the positive / negative plate of the first batch. Take a circumference.

Preferably, the lamination unit, the positive electrode plate attachment portion for attaching the positive electrode plate to the separator; A negative plate attachment portion for attaching a negative plate to the separator; A positive plate storage unit for storing a positive plate; A negative plate storage unit for storing a negative plate; And a negative electrode plate moving part for moving the negative electrode plate stored in the negative electrode plate storage part to the negative electrode plate attaching part, wherein the positive electrode plate storage part comprises: first, second and third housings; And a holder moving member for moving the first, second, and third holders, wherein the first holder houses a positive electrode plate coated with an active material only on one side of both sides of the metal plate, and the second holder contains active materials on both sides of the metal plate. The coated positive plate is accommodated, and the third holder contains the positive plate coated with the active material only on the other side of both surfaces of the metal plate.

The lithium secondary battery manufacturing apparatus according to the present invention can efficiently produce a lithium secondary battery made of a large electrode plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

3 is a front view showing a lithium secondary battery manufacturing apparatus according to a preferred embodiment of the present invention, Figure 4 is a plan view showing the lithium secondary battery manufacturing apparatus.

Referring to the drawings, the lithium secondary battery manufacturing apparatus 100 is a supply unit 10 for supplying the separator (S), the adhesive coating unit 20 for applying the adhesive to the separator S in a predetermined pattern, and the separator ( A lamination unit 30 for attaching the positive electrode plate 1 and the negative electrode plate 2 to the S), and a packing unit 50 for folding and packing the separator S having the positive / negative electrode plates 1 and 2 attached thereto in a Z shape. ).

The supply unit 10 includes a supply roll 11 on which the separator S is wound, a tension adjusting unit for adjusting the tension applied to the separator S, and a stopper for selectively stopping the movement of the separator S. .

The tension adjusting unit includes a tension adjusting roller 13 which is lifted up and down along the vertical long hole 12. The separator S moved from the feed roll 11 is moved around the tension adjusting roller 13. Therefore, when excessive tension is applied to the separator S and the separator S is taut, the tension adjusting roller 13 is raised along the vertical long hole 12, and when the separator S is loosened, the tension adjusting roller 13 is loosened. Is lowered along the vertical hole 12.

The stopper prevents separator S from being excessively loosened by inertia. The separator S is moved by the clamping member 52. When the clamping member 52 grasps the positive / cathode plates 1 and 2 attached to the separator S and moves to the pressing section 56, the separator S is released from the supply roll 11. At this time, even if the clamping member 52 reaches the pressurizing portion 56 and stops moving, the separator S may continue to be released from the supply roll 11 due to inertia. It is prevented from releasing continuously from the supply roll 11.

The stopper includes a stopper cylinder 14 capable of vertically expanding and contracting, and a rotating member 15 installed at the tip of the stopper cylinder 14 and rotatable about the pivot shaft 16. While the clamping member 52 holds the positive / cathode plates 1 and 2 and moves to the pressing section 56, the stopper cylinder 14 is kept in a contracted state, so that the rotating member 15 is guide roller ( 17). When the clamping member 52 arrives at the pressing portion 56, the stopper cylinder 14 expands, and when the stopper cylinder 14 expands, the rotation member 15 rotates clockwise to guide the guide roller 17. By contact, the movement of the separator S is prevented.

The separator S having passed through the stopper and the tension adjusting unit is moved to the adhesive applying unit 20.

The adhesive application unit 20 applies an adhesive on both sides of the separator S in a predetermined pattern so that the positive / negative plates 1 and 2 can be adhered to the separator S. FIG.

As shown in FIG. 5A and FIG. 5B, the adhesive application unit 20 has the upper application member 21a which apply | coats an adhesive agent to one side (upper surface) of both surfaces of separator S, and both surfaces of separator S. FIG. The lower coating member 21b for applying the adhesive to the other surface (lower surface) of the lower surface, the first conveying portion for transferring the upper / lower coating member 21a, 21b in the ± x direction, and the upper / lower coating member 21a. ) Is provided with a second transfer portion for feeding 21b in the ± y direction. The upper and lower application members 21a and 21b are respectively connected to the second transfer block 24 by the connection member 22.

The first transfer unit moves the first transfer block 23 in the ± x direction by using a motor (not shown) and a belt (not shown). The first transfer block 23 is moved in the ± x direction by a motor (not shown) and a belt (not shown) along a rail (not shown).

The second transfer unit moves the second transfer block 24 in the ± y direction by using a motor (not shown) and a belt (not shown). The second transfer block 24 is reciprocated in a ± y direction by a motor (not shown) and a belt (not shown) along a rail provided on the upper surface of the first transfer block 23. Meanwhile, the first and second transfer blocks 23 and 24 may be moved using a cylinder or the like instead of the motor and the belt.

In this way, since the adhesive applying unit 20 can move the upper and lower application members 21a and 21b in the ± x and ± y directions, the adhesive is applied to the size of the electrode plates 1 and 2. can do.

The separator S coated with adhesive on both sides is moved to the lamination unit 30.

6 to 8, the lamination unit 30 includes a positive electrode plate attaching portion for attaching the positive electrode plate 1 to the separator S, a negative electrode plate attaching portion for attaching the negative electrode plate 2 to the separator S, and A negative electrode plate movement unit for moving the positive electrode plate storage unit 31 storing the positive electrode plate 1, the negative electrode plate storage unit 32 storing the negative electrode plate 2, and the negative electrode plate 2 stored in the negative electrode plate storage unit 32 to the negative electrode plate attachment portion A part is provided. For convenience of explanation, a case in which the positive electrode plate 1 is attached to one side (upper surface) of both surfaces of the separator S and the negative electrode plate 2 is attached to the other side (lower surface) will be described as an example. It is of course possible that the negative electrode plate 2 is attached to one side (upper surface) of both surfaces of S) and the positive electrode plate 1 is attached to the other side (lower surface).

Attachment of the negative electrode plate 2 by the negative electrode plate attachment portion and attachment of the positive electrode plate 1 by the positive electrode plate attachment portion are performed simultaneously. In addition, only one positive electrode plate 1 and the negative electrode plate 2 are attached to the separator S during the one-time reciprocation of the positive / cathode plate attachment portion.

The positive electrode plate attaching portion attaches the positive electrode plate 1 accommodated in the positive electrode plate storage part 31 to the upper surface of the separator S while reciprocating between the positive electrode plate storage part 31 and the separator S. FIG. The positive plate attachment portion is a first attachment block 33b moved in the ± y direction along the rail 33a and a first attachment cylinder installed in the first attachment block 33b and expanded / contracted in the vertical direction (± z direction). 33c and the 1st press plate 33d provided in the front-end | tip of the 1st attachment cylinder 33c. Since the suction hole 33e connected to the vacuum pump (not shown) is formed in the first pressure plate 33d, the first pressure plate 33d may adsorb the positive electrode plate 1.

When the first mounting block 33b is moved above the anode plate storage part 31 along the rail 33a by the first moving cylinder 36, the first mounting plate 33c expands, and then the first pressure plate. 33d adsorbs the positive electrode plate 1. When the first pressure plate 33d adsorbs the positive electrode plate 1, the first attachment cylinder 33c contracts to raise the first pressure plate 33d, and then the first attachment block 33b moves upward of the separator S. Move. After the first attachment block 33b moves upward of the separator S, the first attachment cylinder 33c expands to lower the first pressing plate 33d to the separator S, and then the first pressing plate 33d. The positive plate 1 is firmly attached to the separator S by pressing the first pressure plate 33d against the second pressure plate 34d while releasing the adsorption. Since the first pressure plate 33d and the second pressure plate 34d attach the positive / negative electrode plates 1 and 2 at the same time on the upper and lower portions of the separator S, the first pressure plate 33d is the second pressure plate 34d. The pressing force of the second pressing plate (34d) is to support the pressing force of the first pressing plate (33d).

The negative electrode plate attaching part attaches the negative electrode plate 2 moved by the negative electrode plate moving part to the lower surface of the separator S while reciprocating between the negative electrode plate moving part and the separator S. FIG. The negative electrode plate moving part moves the negative electrode plate 2 stored in the negative electrode plate storage part 32 to the negative electrode plate attachment part.

The negative electrode attachment portion 34b moves along the rail 34a in the ± y direction, and the second attachment cylinder is installed on the second attachment block 34b and expands / contracts in the vertical direction (± z direction). 34c and the 2nd press plate 34d provided in the front-end | tip of the 2nd attachment cylinder 34c.

The negative plate moving part is installed in the third attachment block (not shown) and the third attachment block (not shown) moved along the rail 35a in the ± y direction by the second movement cylinder 37, and the vertical direction (± and a third attaching cylinder (not shown) expanded / contracted in the z direction) and a suction plate 35b provided at the tip of the third attaching cylinder (not shown). Since the suction plate 35c connected to the vacuum pump (not shown) is formed in the second pressure plate 34d and the suction plate 35b, the second pressure plate 34d and the suction plate 35b can adsorb the negative electrode plate 2. have.

When the suction plate 35b is lowered by the expansion of the third attachment cylinder, and the negative plate 2 adsorbed in the negative plate storage unit 32 is sucked, the third attachment cylinder contracts. Subsequently, when the third attachment block moves in the -y direction and the suction plate 35b is at a position corresponding to the second pressure plate 34d, the movement of the third attachment block is stopped, and after the movement of the third attachment block is stopped. When the second attachment cylinder 34c expands and the second pressure plate 34d rises up to the adsorption plate 35b, the adsorption of the adsorption plate 35b is released and the adsorption of the second pressure plate 34d starts. It is moved to the 2nd press plate 34d. When the negative electrode plate 2 is moved to the second pressure plate 34d, the second mounting block 34b moves along the rail 34a to the separator S in the -y direction and stops. After the second attachment block 34b is stopped at the bottom of the separator S, the second attachment cylinder 34c expands and the negative electrode plate 2 mounted on the second pressure plate 34d is attached to the bottom surface of the separator S. Be sure to

Meanwhile, as shown in FIG. 8, the positive electrode plate storage part 31 includes first, second and third holders 31a, 31b and 31c, and first, second and third holders 31a, 31b and 31c. It is provided with a holder moving member for moving in the ± x direction. The first, second and third holders 31a, 31b and 31c have storage spaces formed therein in a vertical direction (z direction), and a plurality of positive electrode plates 1 are vertically stacked in the storage space.

Preferably, the first holder (31a) is housed in the first positive electrode plate (1) attached to the separator (S), the second holder (31b) is housed in the second plate (31) attached after the first attachment, the third holder The positive electrode plate 1 attached last is housed in 31c. That is, the positive electrode plate 1 attached to the separator S for the first time in the process of making the positive / negative electrode plates 1 and 2 in one batch is accommodated in the first holder 31a and the positive electrode plate 2 used after the first attachment. ) Is housed in the second holder 31b, and the positive electrode plate 1, which is attached last among the positive / cathode plates 1 and 2 in one batch, is stored in the third holder 31c. The positive plate 1 housed in the first holder 31a is coated with an active material only on one side of the metal plate, and the positive plate 1 housed in the second holder 31b has an active material coated on both sides of the metal plate. The positive electrode plate 1 accommodated in the third holder 31c is coated with an active material only on the other side of the metal plate.

The storage box moving member is provided with the screw 31d provided below the male box 31a, 31b, 31c, and the screw movement motor 31e which rotates the screw 31d. When the screw movement motor 31e is rotated, the screw 31d is rotated, and when the screw 31d is rotated, the holder moving member is moved in the ± x direction while being guided by the guide rod 31f.

In the case of attaching the positive electrode plate 1 to the separator S for the first time, the holder moving member positions the holders 31a, 31b and 31c so that the first holder 31a corresponds to the first pressing plate 33d. Thereafter, the holders 31a, 31b and 31c are positioned so that the second holder 31b corresponds to the first pressing plate 33d. Finally, when the positive plate 1 is attached, the third holder 31c is attached. The holders 31a, 31b and 31c are positioned to correspond to the first pressing plate 33d.

When the attachment of the positive / cathode plates 1 and 2 is completed, the separator S is moved to the packing unit 50.

The packing unit 50 moves the separator S on which the positive / cathode plates 1 and 2 are attached to the pressing unit 56 by one pitch, and at the same time, the moving unit 51 that is folded in a Z-shape, and the Z-shaped. The pressurizing part 56 which presses and fixes the separator S folded in the form from the upper side is included. The pitch 1 indicates the distance between the positive electrode plate and the positive electrode plate (P in FIG. 12A), or the distance P between the negative electrode plate and the negative electrode plate.

The moving part 51 grips the clamping member 52 holding the positive / cathode plates 1 and 2 attached to the separator S, and when the clamping member 52 holds the positive / cathode plates 1 and 2. And a moving member for moving the clamping member 52 to the pressing unit 56.

Two clamping members 52 are provided to hold both sides of the positive / cathode plates 1 and 2. The clamping member 52 includes a rail 52a, a clamping block 52b which moves in the ± y direction along the rail 52a, and an upper and lower flat plate 52c provided below the clamping block 52b ( 52d).

The clamping block 52b moves in the ± y direction along the rail 52a by expansion / contraction of the cylinder 52e. The rail 52a is provided in the y direction.

The upper plate 52c reciprocates in the ± z direction by the upper plate cylinder, and the lower plate 52d reciprocates in the ± z direction by the lower plate cylinder. That is, when the cylinder 52e contracts while the upper plate 52c and the lower plate 52d are spaced apart from each other, the clamping block 52b moves to both sides of the positive / cathode plates 1 and 2 so that the upper and lower plates 52c are contracted. The positive / negative electrode plates 1 and 2 are inserted between the flat plates 52c and 52d. Subsequently, as the upper flat cylinder expands and the lower flat cylinder contracts, the upper flat plate 52c descends and the lower flat plate 52d rises, so that the upper / lower flat plates 52c and 52d are positive / negative plates 1. ) (2).

The moving member includes a rail 54a provided along the x direction, a moving block 54b moving along the rail 54a in the ± x direction, a lower rail 54c provided on the lower surface of the moving block 54b, and moving. The screw 54d provided in the block 54b is provided.

The moving block 54b moves in the ± x direction along the rail 54a by a motor (not shown) or the like, and the clamping member 52 moves in the ± x direction by the movement of the moving block 54b.

In addition, it is necessary to adjust the position of the upper and lower flat plates 52c and 52d according to the size of the pole plates 1 and 2, and if the screw 54d is rotated forward / backward, the clamping block 52b is ± y. Since it moves in the direction, the position of the upper and lower flat plates 52c and 52d can be adjusted.

The pressing section 56 includes a main pressing section for pressing the center of the stacked positive / cathode plates 1 and 2 and an auxiliary pressing section for pressing the edges of the positive / cathode plates 1 and 2.

The main pressurizing portion includes a main cylinder 57a and a main pressurizing plate 57b that moves in the ± z direction by the main cylinder 57a. When the separator S with the positive / cathode plates 1 and 2 is moved to the pressing unit 56 by the moving unit 51, the main cylinder 57a contracts to lift the main pressing plate 57b ( + z direction) so that the separator S can be folded in a Z shape, and after the separator S is folded in a Z shape, the main cylinder 57a expands to lower the main pressure plate 57b (-z). Direction) to pressurize the center of the positive / cathode plates 1 and 2.

The auxiliary pressurizing portion includes a first auxiliary pressurizing portion for selectively pressing the front portion of the positive / negative plate (1) (2) and a second auxiliary pressing portion for selectively pressing the rear portion of the positive / cathode plate (1) (2).

The first auxiliary pressing part includes a first auxiliary pressing plate 58a and a first moving means 58b for moving the first auxiliary pressing plate 58a. The first moving means 58b includes a first ball screw for moving the first auxiliary pressure plate 58a in the ± x direction, a second ball screw for moving the first ball screw in the ± z direction, and a first ball screw. A first servomotor for forward / reverse rotation and a second servomotor for forward / reverse rotation of the second ball screw are provided. That is, the first ball screw is installed on the flat plate moved in the ± z direction (vertically up and down) by the second ball screw, and the first auxiliary pressing plate 58a is installed at the tip of the first ball screw, thereby providing the first ball. According to the forward / reverse rotation of the screw, the first auxiliary pressing plate 58a is moved in the ± x direction.

The second auxiliary pressing part includes a second auxiliary pressure plate 59a and second moving means 59b for moving the second auxiliary pressure plate 59a. The second moving means 59b includes a third ball screw for moving the second auxiliary pressure plate 59a in the ± y direction, a fourth ball screw for moving the third ball screw in the ± z direction, and a third ball screw. And a third servomotor for forward / backward rotation and a fourth servomotor for forward / backward rotation of the fourth ball screw. That is, the third ball screw is installed on the flat plate moved in the ± z direction by the fourth ball screw (vertically goes up and down), and the second auxiliary pressing plate 59a is installed at the tip of the third ball screw to make the third ball. According to the forward / reverse rotation of the screw, the second auxiliary pressing plate 59a is moved in the ± y direction. As shown in FIG. 10, it is preferable that two second auxiliary pressing portions are provided on both sides of the positive / negative electrode plates 1 and 2.

When the separator S with the positive / cathode plates 1 and 2 is moved to the pressing unit 56 by the moving unit 51, the main pressing plate 57b is moved upward by the contraction of the main cylinder 57a. And the first and second auxiliary pressure plates 58a and 59a maintain the state in which the positive / cathode plates 1 and 2 are pressed. In this state, the moving unit 51 moves to separate the separator S. After folding in a Z shape and the separator S is folded in a Z shape, the main pressure plate 57b is lowered by expansion of the main cylinder 57a to press the center of the positive / cathode plates 1 and 2. FIG. 11A shows this state (the state in which the main pressing plate 57b and the first and second auxiliary pressing plates 58a and 59a pressurize the positive / negative electrode plates 1 and 2). 11A to 11E illustrate some components for convenience of understanding.

Subsequently, as shown in FIG. 11B, the first and second auxiliary pressure plates 58a and 59a retreat backward by the rotation of the first and third ball screws to release the pressure on the positive / cathode plates 1 and 2. Then, as shown in FIG. 11C, the upper portion is raised by the rotation of the second and fourth ballscrews, and then, as shown in FIG. As shown in FIG. 11E, the first and second auxiliary pressure plates 58a and 59a are lowered to the positive / negative plate 1 and 2 by the rotation of the second and fourth ball screws, thereby newly stacking the positive / negative plate 1. Press the edge of (2).

12A to 12E are diagrams illustrating that the separator S is folded in a Z shape by the lamination unit 30 and the packing unit 50. 12A to 12E illustrate some components for convenience of understanding.

FIG. 12A shows a state in which the clamping member 52 grips both sides of the positive / cathode plates 1 and 2 attached to the separator S. As shown in FIG. Before the clamping member 52 moves to the pressing portion 56 by the moving member or immediately after the movement of the pressing portion 56 starts, the main pressing plate 57b is raised (see FIG. 12B). . On the other hand, at this time, it is preferable that the supporting plate 53 supporting the stacked positive / cathode plates 1 and 2 also moves downward by a predetermined interval, which is moved by the clamping member 52 ( This is to make 1) (2) move easily. The movement of the support plate 53 may be made by a conventional cylinder (not shown), the operation of the cylinder may be to be linked to the operation of the main cylinder (57a). 12C and 12D show that the new positive / cathode plates 1 and 2 are stacked by this process.

When the new positive / negative plate (1) (2) is stacked, as shown in Fig. 12E, the main pressing plate (57b) is lowered to press the center portion of the positive / negative plate (1) (2) and the clamping member (52) Release the grip on the positive / negative plate (1) (2). Subsequently, the clamping member 52 moves toward the lamination unit 30, and the first and second auxiliary pressure plates 58a and 59a are retracted, raised, moved forward and lowered as described above (Figs. 11A to 11E). The edge portions of the newly stacked positive / cathode plates 1 and 2 are pressed (see FIG. 12A).

When the positive / cathode plates 1 and 2 in one batch are laminated through the above process, the cutting unit 40 cuts the separator S. That is, the cutting unit 40 cuts the separator S after the positive / negative electrode plates 1 and 2 which are finally stacked are stacked.

As shown in FIG. 13A and FIG. 13B, the cutting unit 40 is installed in the shandong block 47, and the cutter member 41 which cuts the separator S while moving in the ± y direction, and the shandong block 47. ) Is provided with a shanghai copper cylinder (46) for moving in the ± z direction.

The shanghai block 47 has a rail 48 provided on its side and a recess line 49 formed on its upper surface. Concave line 49 is formed along the y direction, the end of the cutter 42 is inserted.

The cutter member 41 cuts the separator S while moving in the ± y direction along the rail 48. In order to move the cutter member 41 in the ± y direction, a conventional moving means (not shown), for example, a motor or a cylinder may be used.

After the stacking of the positive / cathode plates 1 and 2, which are finally stacked among the positive / cathode plates 1 and 2 in one batch, is completed, the Shanghai-dong cylinder 46 is elongated and the Shanghai-dong block 47 is raised. The cutter member 41 is cut along the rail 48 while moving in the ± y direction.

When the cutter member 41 cuts the separator S, the transfer unit 60 moves the holder unit 80 from the support plate 53 to the positive / cathode plates 1 and 2 in one batch placed on the support plate 53. It is rotated so that the separator S is wound around the positive / negative electrode plates 1 and 2 in one batch.

As shown in Fig. 14 and Fig. 15, the transfer unit 60 is a holding part 61 for holding the positive and negative plates (1) and (2) in one batch, and the holding plate 61 is rotated to support the support plate 53 ) To a holder unit 80 is provided. For convenience of understanding, the gripping portion 61 and the holder unit 80 are not illustrated in FIG. 14. In addition, the part shown with the dotted line in FIG. 14 and FIG. 15 shows after the holding part 61 and the conveyance part 65 are moved.

The holding part 61 is provided with two so that the positive / cathode plates 1 and 2 of one batch may be gripped from both sides. The gripping portion 61 includes an upper gripping member 61a, a lower gripping member, and a gripping cylinder (not shown) to move the upper and lower gripping members in a ± z direction so as to approach or be spaced apart from each other.

When the positive / cathode plates 1 and 2 in one batch are inserted between the upper gripping member 61a and the lower gripping member, the upper gripping member 61a and the lower gripping member are spaced apart from each other by the gripping cylinder. When the positive / cathode plates 1 and 2 are gripped and conveyed, the upper and lower holding members 61a and the lower holding members are brought close to each other by the holding cylinder.

The transfer part 65 includes a first moving plate 66 moving along the first rail 66a installed in the x direction, a second rail 67a provided in the y direction on the upper surface of the first moving plate 66, and A second moving plate 67 moving along the second rail 67a, a transfer cylinder 67b installed on the first moving plate 66 to move the second moving plate 67 in the ± y direction, It is provided with the 2nd moving plate 67, and the holding part rotation motor 68 which rotates the holding part 61. As shown in FIG.

When the stacking of the positive and negative plates 1 and 2 in one batch on the support plate 53 is completed, the transfer cylinder 67b is contracted so that the positive and negative plates in one batch between the upper holding member 61a and the lower holding member ( 1) (2) is inserted, and then the upper and lower gripping members are placed in a batch of positive / cathode plates 1 (2) so that the upper and lower gripping members 61a and the lower gripping members approach each other by a gripping cylinder. ).

When the upper / lower holding member grips the positive / cathode plates 1 and 2 in one batch, the first moving plate 66 moves along the first rail 66a to the holder unit 80. Subsequently, the gripper rotating motor 68 is operated so that the separator S is wound around the positive / negative electrode plates 1 and 2 in one batch.

Preferably, the transfer unit 60 is provided with a fixed roller part 70 for preventing the separator S from fluttering while being wound. The fixed roller part 70 has the upper roller 71, the lower roller 75, the upper roller cylinder 72 which moves the upper roller 71 in the ± z direction, and the lower roller 75 by ± z. The lower roller cylinder 76 which moves in the direction is provided.

1 After the positive / cathode plates 1 and 2 of the batch are moved to the holder unit 80 by the transfer unit 65, the upper roller 71 moves downwards and the lower roller 75 moves upwards and downwards. After the rollers 71 and 75 are brought into close contact with each other, the flutter of the separator S is prevented by rotating the positive / cathode plates 1 and 2 in one batch.

When the winding of the separator S is completed, the holder unit 80 grips the positive / negative electrode plates 1 and 2 in one batch.

As shown in FIG. 16, the holder unit 80 includes a support frame 81, a sliding member 83 provided on the support frame 81 so as to be slidable in a ± x direction, and an upper / outer provided on the sliding member 83. Lower holding members 85 and 86 and upper and lower holding members 85 and 86 are provided with holding cylinders 87 for approaching or spaced apart from each other.

A guide hole formed in the x direction is formed in the support frame 81, and the guide rod 83a of the sliding member 83 is installed to be slidable in the guide hole. The sliding member 83 may be moved in the ± x direction by the moving member (not shown). As the moving member, a conventional motor or cylinder may be used.

When the sliding member 83 slides in the -x direction and a positive / negative electrode plate 1 or 2 is placed between the upper and lower holding members 85 and 86, the holding cylinder 87 contracts and The lower holding members 85 and 86 hold the positive / cathode plates 1 and 2.

Then, the operation of the lithium secondary battery manufacturing apparatus 100 according to the preferred embodiment of the present invention will be described.

First, the separator S supplied from the supply roll 11 passes through the tension control part and the stopper sequentially. When the clamping member 52 grips the positive / cathode plates 1 and 2 attached to the separator S and moves to the pressurizing unit 56, the separator S wound on the supply roll 11 is released to adjust the tension. Supplied by wealth. At this time, the tension adjusting roller 13 ascends and descends along the vertical long hole 12 to adjust the tension applied to the separator S, and the stopper is separated even after the clamping member 52 stops at the pressing part 56. Prevents S) from being excessively released by inertia.

The separator S via the tension control unit and the stopper is moved to the adhesive coating unit 20. The adhesive application unit 20 applies an adhesive on both sides of the separator S in a predetermined pattern. The first conveying part conveys the upper and lower applying members 21a and 21b in the ± x direction, and the second conveying part conveys the upper and lower applying members 21a and 21b in the ± y direction. The adhesive can be suitably applied to the separator S according to the size and shape of the (2).

The separator S coated with adhesive on both sides is moved to the lamination unit 30. Attachment of the positive electrode plate 1 by the positive electrode plate attachment portion and attachment of the negative electrode plate 2 by the negative electrode plate attachment portion are simultaneously performed, and one positive electrode plate 1 and one negative electrode plate 2 during the positive / negative electrode plate attachment portion reciprocate once. ) Is attached to the separator (S).

As shown in FIG. 12C and FIG. 12D, the adsorption plate 35b moves to the negative electrode plate storage part 32 to adsorb the negative electrode plate 2, and then moves to the upper side of the second pressure plate 34d, and then the adsorption plate 35b is moved. The negative pressure plate 2 is lowered to the second pressure plate 34d to be adsorbed onto the second pressure plate 34d. At the same time, the first pressure plate 33d moves to the positive plate storage portion 31 to adsorb the positive plate 1. After the adsorption is completed, the first pressure plate 33d moves to the upper side of the separator S, and the second pressure plate 34d moves to the lower side of the separator S. Then, as shown in FIG. 12E, the first pressure plate 33d and the second pressure plate 34d are simultaneously turned up and down toward the separator S so that the positive electrode plate 1 and the negative electrode plate 2 are bonded to the separator S. As shown in FIG.

When the adhesion of the positive / cathode plates 1 and 2 is completed, as shown in FIG. 12A, the clamping member 52 grips both sides of the positive / cathode plates 1 and 2, and then moves to the support plate 53. Let's do it. At this time, as shown in Figure 12b, the main pressing plate (57b) is raised by a predetermined interval upwards and the support plate 53 is lowered by a predetermined interval downwards of the positive / negative electrode plate (1) (2) by the clamping member 52 Make it possible to move. On the other hand, also in this case, the first and second auxiliary pressure plates 58a and 59a maintain the state of pressing the edges of the positive / negative electrode plates 1 and 2, as shown in Figs. 12B and 12C.

When the separator S to which the positive / negative plate 1 and 2 are attached is folded in a Z-shape, the support flat plate 53 is raised and the main press plate 57b is lowered, as shown in FIG. 11A. Subsequently, as shown in FIG. 11B, the first auxiliary pressure plate 58a retreats in the + x direction and the two second auxiliary pressure plates 59a retreat in the + y direction and the -y direction, respectively, and then shown in FIG. 11C. As shown in FIG. 11D, the first and second auxiliary pressure plates 58a and 59a are raised upwards, and then the first and second auxiliary pressure plates 58a and 59a are connected to the positive and negative plates 1 and 2. After moving upward, as shown in FIG. 11E, the first and second auxiliary pressure plates 58a and 59a are lowered to press the positive / cathode plates 1 and 2. FIG. 11E is a state corresponding to FIG. 12A.

By repeating this process, one batch of positive / cathode plates 1 and 2 is laminated on the support plate 53. When the lamination of the positive / cathode plates 1 and 2 in one batch is completed, the cutter member 41 is cut in the + y direction while cutting the separator S. As shown in FIG.

When the cutting is completed, the grip unit 61 grips one batch of positive / cathode plates 1 and 2 and transfers them to the holder unit 80. Then, the grip unit rotating motor 68 is operated to perform one batch. The separator S is wound around the positive / cathode plates 1 and 2. At this time, the fixed roller part 70 to prevent the upper roller 71 and the lower roller 75 in close contact with each other to prevent flapping of the separator (S). When the winding of the separator S is completed, the sliding member 83 slides in the -x direction to hold the positive / negative electrode plates 1 and 2 in one batch.

1 is a front view showing that the positive electrode plate and the negative electrode plate on both sides of the separator to manufacture a lithium secondary battery.

FIG. 2 is a front view illustrating folding of a separator with a positive / negative plate in a Z-shape; FIG.

Figure 3 is a front view showing a lithium secondary battery manufacturing apparatus according to a preferred embodiment of the present invention.

4 is a plan view showing the lithium secondary battery manufacturing apparatus of FIG.

Figure 5a is a front view showing an adhesive coating unit provided in the lithium secondary battery manufacturing apparatus of Figure 3;

5B is a plan view showing the adhesive application unit of FIG. 5A.

6 is a front view showing a lamination unit provided in the lithium secondary battery manufacturing apparatus of FIG.

7 is a plan view showing the lamination unit of FIG.

8 is a plan view showing a positive electrode plate storage unit provided in the lithium secondary battery manufacturing apparatus of FIG.

9 is a front view showing a moving unit provided in the lithium secondary battery manufacturing apparatus of FIG.

10 is a plan view showing a pressing unit provided in the lithium secondary battery manufacturing apparatus of FIG.

11A through 11E are cross-sectional views sequentially illustrating operations of the main pressurization unit and the auxiliary pressurization unit provided in the pressurizing unit of FIG. 10.

12A to 12E are diagrams sequentially illustrating operations of the lamination unit and the packing unit provided in the lithium secondary battery manufacturing apparatus of FIG. 3.

Figure 13a is a front view showing a cutting unit provided in the lithium secondary battery manufacturing apparatus of Figure 3;

FIG. 13B is a plan view showing the cutting unit of FIG. 13A; FIG.

14 is a plan view showing a transfer unit and a holder unit provided in the lithium secondary battery manufacturing apparatus of FIG.

15 is a front view showing the transfer unit of FIG.

16 is a front view showing the holder unit of FIG.

<Explanation of symbols for the main parts of the drawings>

10: supply unit 20: adhesive coating unit

30: lamination unit 40: cutting unit

50: packing unit 60: transfer unit

70: fixed roller portion 80: holder unit

100: lithium secondary battery manufacturing apparatus

Claims (8)

A supply unit for supplying a separator; A lamination unit attaching a positive electrode plate to one side of both sides of the separator moved from the supply unit and a negative electrode plate to the other side of the both sides, the positive electrode plate and the negative electrode plate corresponding to each other; And And a packing unit for folding and packing the separator with the positive / negative plate in a Z-shape so that the positive electrode plate and the negative electrode plate are alternately stacked. The packing unit is A moving unit which reciprocates between the lamination unit and the pressing unit and folds in a Z shape while moving the separator with a positive / negative plate to the pressing unit by one pitch; And, It includes; the pressing unit for fixing the positive / negative electrode plate from the upper side, As the separator with the positive / negative plate is moved to the pressing unit by one pitch by the moving unit, it is folded in a Z-shape so that the positive / negative plate can be stacked. Lithium secondary battery manufacturing apparatus, characterized in that the interval (P) between the positive electrode plate. The method of claim 1, The lamination unit attaches one positive electrode plate and one negative electrode plate to correspond to both sides of the separator, and then moves the one positive / negative plate to the pressing unit while the moving unit folds the separator in a Z-shape to stack the positive / negative plate. Secondary battery manufacturing apparatus. The method according to claim 1 or 2, Pressing unit, A main pressurizing unit for pressing the center of the stacked positive / cathode plates; And Includes; an auxiliary pressing unit for pressing the edge of the positive / negative electrode plate, When the separator with the positive / negative plate is moved to the pressurizing part by the moving part, the main pressurizing part is moved upward, and the auxiliary pressurizing part keeps pressing the positive / cathode plate, and the moving part is moved after the main pressurizing part is raised upward. After the separator is folded in a Z shape, the separator is folded in a Z shape, the main pressurization portion descends to press the center of the positive / negative plate, and the auxiliary pressurization unit retreats backward to release the pressurization on the positive / cathode plate and then rise. And then advancing above the edge, and then descending into the positive / negative plate to press the edges of the newly stacked positive / negative plate. The method of claim 3, The moving part, A clamping member for selectively gripping a positive / negative plate attached to the separator; And a moving member for moving the clamping member to the pressing part after the clamping member grips the positive / negative plate. The method of claim 4, wherein And a cutting unit installed between the lamination unit and the pressurizing unit and cutting the separator after the batch of the positive / negative plate is finished. The method of claim 3, The pressing portion has a supporting plate for supporting the laminated positive and negative plates, And a support flat plate moves downward by a predetermined interval when the separator is moved to the pressing unit so that the moving unit easily moves the separator on which the positive / cathode plate is attached to the pressing unit. The method of claim 1, Lithium secondary battery, characterized in that it comprises a transfer unit for holding a batch of positive / negative electrode plate of the lamination is completed by the packing unit, moved to the holder unit and then rotated so that the separator is wound around the positive / negative plate of the 1 batch Manufacturing equipment. The method of claim 1, Lamination unit, A positive plate attaching portion attaching the positive plate to the separator; A negative plate attachment portion for attaching a negative plate to the separator; A positive plate storage unit for storing a positive plate; A negative plate storage unit for storing a negative plate; And, And a negative electrode plate moving part for moving the negative electrode plate stored in the negative electrode plate storage part to the negative electrode plate attachment part. The positive plate storage unit, First, second and third holders; And And a holder moving member for moving the first, second and third holders, The first holder accommodates the positive electrode plate coated with the active material on only one side of both sides of the metal plate, and the second holder houses the positive electrode plate coated with the active material on both sides of the metal plate, and the third holder holds only the other side of both sides of the metal plate. A lithium secondary battery manufacturing apparatus, characterized in that the positive electrode plate coated with the active material is accommodated.

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