KR20230027154A - Secondary Battery Stacking Equipment - Google Patents

Abstract

In this embodiment, in the secondary battery stacking equipment for manufacturing a stack cell in which positive electrodes and negative electrodes are alternately disposed with a separator in between, the separator is wound, an unwinder for supplying the separator, and at least one for guiding the separator. A first operation of moving a guide roller, a stacking table in which anode electrodes and cathode electrodes are alternately disposed with a separator interposed therebetween, a buffer roller for guiding the separator, and a buffer roller from a first position to a second position; A roller moving mechanism that alternately performs the second operation of moving the buffer roller from the second position to the first position, and a first robot that moves the anode electrode on the separator on the lamination table after being moved to the lamination table, and After being moved, it includes a second robot that places the cathode electrode on the separator on the stacking table, and a separator feeder disposed between the guide roller and the buffer roller in the moving path of the separator.

Description

Secondary Battery Stacking Equipment

The present invention relates to secondary battery stacking equipment.

A secondary battery is a device that converts electrical energy into chemical energy, stores it, and generates electricity when needed. is distinguished based on the discharge response.

A secondary battery includes positive and negative plates coated with an active material on a current collector, a separator that separates the positive and negative plates, an electrolyte that transfers ions through the separator, a case that accommodates the positive and negative plates, the separator, and the negative plate, and the positive and negative plates. It includes a lead tab connected to the negative electrode and pulled out.

The secondary battery may be classified into a cylinder type, a prismatic type, and a pouched type according to its shape.

Pouch-type secondary batteries are widely used in the secondary battery industry because their shapes can be relatively free including a case such as a flexible pouch, the manufacturing process is relatively easy, and the manufacturing cost is low.

An example of a pouch-type secondary battery is a pouch-type secondary battery incorporating a thermally expandable layer disclosed in Korean Patent Publication No. 10-2018-0095982 A (published on August 29, 2018), and this pouch-type secondary battery includes a positive electrode, an electrode current collector including a negative electrode and a separator; A pouch enclosing the electrode current collector is included.

An object of the present invention is to provide secondary battery stacking equipment capable of minimizing shaking or tearing of a separator during secondary battery manufacturing.

Another object of the present invention is to provide a secondary battery stacking equipment capable of producing stack cells more quickly.

An embodiment of the present invention is a secondary battery stacking equipment for manufacturing a stack cell in which positive electrodes and negative electrodes are alternately disposed with a separator interposed therebetween, in which the separator is wound, an unwinder for supplying the separator, and a separator guide. At least one guide roller for moving the separator, a stacking table in which anode electrodes and cathode electrodes are alternately disposed with a separator interposed therebetween, a buffer roller for guiding the separator, and a first for moving the buffer roller from a first position to a second position. A roller moving mechanism that alternately performs the operation and the second operation of moving the buffer roller from the second position to the first position, and a first robot that moves on the lamination table and then places the anode electrode on the separator on the lamination table; It may include a second robot that moves on the table and then places the cathode electrode on the separator on the stacking table, and a separator feeder disposed between the guide roller and the buffer roller in the moving path of the separator.

The separator feeder may feed the separator while the buffer roller moves from the first position to the second position.

The separator feeder may feed the separator while the buffer roller moves from the second position to the first position.

The roller movement mechanism may include a carrier equipped with buffer rollers, a screw through which the carrier is linearly moved, and a driving source for rotating the screw.

Each of the first position and the second position may be an upper periphery of the stacking table.

A distance between the first position and the second position may be longer than the width of the stacking table.

The first robot can be moved on the stacking table while the buffer roller is moved from the first position to the second position.

When the movement of the buffer roller to the second position is completed, the first robot may seat the anode electrode on the separator.

The second robot can be moved on the stacking table while the buffer roller is moved from the second position to the first position.

When the movement of the buffer roller to the first position is completed, the second robot may seat the cathode electrode on the separator.

A dancer roller disposed between the guide roller and the separation membrane feeder during the movement path of the separation membrane to maintain tension of the separation membrane may be further included.

A dancer roller disposed between the separation membrane feeder and the buffer roller in the movement path of the separation membrane to maintain tension of the separation membrane may be further included.

The secondary battery stacking equipment may further include a sensor for detecting the separator and a roller moving mechanism for moving the roller constituting the separator feeder in the longitudinal direction of the roller when the position of the separator detected by the sensor is out of a set range. .

According to an embodiment of the present invention, the separation membrane feeder forcibly transfers the separation membrane, so that the separation membrane does not have a large load, and vibration or tearing of the separation membrane that may occur when the separation membrane load is high can be minimized.

In addition, when the load on the separator is small, the separator feeder is stopped to provide appropriate tension required for the separator, and the separator can be stacked with high reliability without being folded or misaligned.

In addition, it is possible to shorten the total manufacturing time of a plurality of stack cells or to maximize the number of stack cells manufactured per unit time.

In addition, even in the case of a large-sized stack cell, it is possible to manufacture a stack cell with high precision.

1 is a plan view showing a stack cell of a secondary battery according to an embodiment of the present invention;
2 is a cross-sectional view of a stack cell of a secondary battery according to an embodiment of the present invention;
3 is a perspective view showing a secondary battery stacking equipment according to an embodiment of the present invention;
4 is a diagram showing secondary battery stacking equipment according to an embodiment of the present invention;
5 is a diagram when the second robot shown in FIG. 4 moves the cathode electrode onto the stacking table;
6 is a view when the second robot shown in FIG. 5 raises the cathode electrode on the separator;
7 is a view when the buffer roller shown in FIG. 6 is moved from the first position to the second position and the first robot moves the anode electrode onto the lamination table;
8 is a view when the first robot shown in FIG. 7 raises the anode electrode on the separator;
9 is a view when the buffer roller shown in FIG. 8 is moved from the second position to the first position and the second robot moves the cathode electrode onto the lamination table;
10 is a view when the second robot shown in FIG. 9 raises the cathode electrode on the separator;
11 is a view when the buffer roller shown in FIG. 10 is moved from the first position to the second position and the first robot moves the anode electrode onto the lamination table;
12 is a plan view of a separation membrane meandering according to an embodiment of the present invention;
FIG. 13 is a plan view when meandering travel of the separator shown in FIG. 12 is corrected.

Hereinafter, specific embodiments of the present invention will be described in detail with drawings.

1 is a plan view illustrating a stack cell of a secondary battery according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a stack cell of a secondary battery according to an embodiment of the present invention.

In the stack cell 1 shown in FIGS. 1 and 2, the positive electrode 2 and the negative electrode 3 may be divided into a separator 4, and the positive electrode 2 and the negative electrode 3 may be separated by a separator ( 4) can be arranged alternately.

A positive electrode tab 2a may be attached to the positive electrode 2 , and a negative electrode tab 3a may be attached to the negative electrode 3 .

The positive electrode may be the first electrode, and the negative electrode may be the second electrode facing the positive electrode.

The separator 4 may be disposed to surround the anode electrode 2 and the cathode electrode 3 . The separator 4 may be disposed not to cover the positive electrode tab 2a and the negative electrode tab 3a.

The separation membrane 4 may be divided into an internal separation membrane 5 and an external separation membrane 6 according to its location.

The inner separator 5 may be defined as a part of the separator 4 located inside the outer separator 6, and has a substantially zigzag shape when manufactured by the secondary battery stacking equipment (10, see FIG. 3). It may be a folded shape.

The outer separator 6 may be a part extending from one end of the inner separator 5, and may be defined as a part that surrounds the inner separator 5, the plurality of anode electrodes 2, and the plurality of cathode electrodes 3 together. .

Such a stack cell 1 may be assembled by secondary battery stacking equipment as shown in FIGS. 3 to 11 .

After each of the separator 4, the anode electrode 2, and the cathode electrode 3 is manufactured, they may be put into secondary battery stacking equipment, and the secondary battery stacking equipment includes the anode electrode 2 and the cathode electrode The anode electrode 2, the separator 4, and the cathode electrode 3 may be stacked so that (3) is disposed with the separator 4 interposed therebetween. The secondary battery stacking equipment can manufacture a stack cell 1 in which positive electrodes 2 and negative electrodes 3 are alternately disposed with a separator 4 interposed therebetween.

Hereinafter, secondary battery stacking equipment for assembling the stack cell 1 will be described.

3 is a perspective view illustrating secondary battery stacking equipment according to an embodiment of the present invention.

4 is a diagram showing secondary battery stacking equipment according to an embodiment of the present invention, FIG. 5 is a diagram when the second robot shown in FIG. 4 moves the negative electrode onto a stacking table, and FIG. 5 is a diagram when the second robot places the cathode electrode on the separator, and FIG. 7 is the buffer roller shown in FIG. 6 being moved from the first position to the second position and the first robot placing the anode electrode on the stacking table. This is the diagram when moving.

FIG. 8 is a diagram showing when the first robot shown in FIG. 7 places the anode electrode on the separator, and FIG. 9 shows that the buffer roller shown in FIG. 8 is moved from the second position to the first position and the second robot moves the cathode electrode. 10 is a diagram when the second robot shown in FIG. 9 raises the cathode electrode on the separator, and FIG. 11 is a diagram when the buffer roller shown in FIG. 10 is moved from the first position. It is a diagram when it is moved to position 2 and the first robot moves the anode electrode onto the lamination table.

The secondary battery stacking equipment 10 supplies the separator 4 so that the separator 4 is folded in a zigzag shape while alternately disposing the positive electrode 2 and the negative electrode 3 with the separator 4 in between. It can be a Z-Stacking device.

The secondary battery stacking equipment 10 includes an unwinder 20 (Unwinder) for winding the separator 4 and supplying the separator 4, and at least one guide roller 30 for guiding the separator 4. can do.

When the unwinder 20 is stopped, the separation membrane 4 can be maintained in a wound state, and the separation membrane 4 can be unwound while rotating in the opposite direction to the direction in which the separation membrane 4 is wound. The unwinder 20 may supply the separator 4 at a constant speed.

The unwinder 20 may include a roller (or bobbin) on which the separator 4 is wound, and a roller rotation mechanism such as a motor for rotating the roller may be connected to the roller.

The guide roller 30 may be a roller that guides the separator 4 unwound from the unwinder 20 . The guide roller 30 may be rotatably disposed. The guide roller 30 may guide the separator 4 so that the separator 4 is bent. The guide roller 30 may maintain the tension of the separator 4 .

The guide roller 30 may form a moving path of the separator 4 .

The secondary battery stacking equipment 10 may include a stacking table 40 . The stack cell 1 constituting the secondary battery may be manufactured on the stacking table 40 . The stacking table 40 may be a stage at which the stack cell 1 is manufactured.

The anode electrode (2), the cathode electrode (3), and the separator (4) constituting the stack cell (1) are placed on the stacking table (40) between the anode electrode (2) and the cathode electrode (3) with the separator (4) in between. can be placed alternately.

An anode alignment table 41 and a cathode alignment table 42 may be respectively disposed around the stacking table 40 .

The anode electrode 2 may be placed on the anode alignment table 41 .

The cathode electrode 3 may be placed on the cathode align table 42 .

The anode alignment table 41 and the cathode alignment table 42 may be spaced apart from each other with the stacking table 40 interposed therebetween.

A cathode magazine 43 in which cathode electrodes are stacked may be disposed around the anode alignment table 41 . Also, a cathode magazine 44 in which cathode electrodes are stacked may be disposed around the cathode align table 42 .

The secondary battery stacking equipment 10 may further include a buffer roller 50 guiding the separator 4 .

The buffer roller 50 may include a pair of rollers 51 and 52 spaced apart from each other with the separator 4 interposed therebetween. One of the pair of rollers 51 and 52 may come into contact with one surface of the separator 4, and the other of the pair of rollers 51 and 52 may come into contact with the other surface of the separator 4. there is.

The buffer roller 50 may push or pull a portion of the separator 4 in a horizontal direction, and may be, for example, a running roller that pushes the separator 4 in a leftward direction or a rightward direction.

A roller moving mechanism 60 may be connected to the buffer roller 50 . The position of the buffer roller 50 may be changed by the roller moving mechanism 60 . The buffer roller 50 may be moved to the first position P1 and the second position P2 by the roller moving mechanism 60 .

The first position P1 and the second position P2 may be positions spaced apart from each other in the horizontal direction. Each of the first position P1 and the second position P2 may be an upper periphery of the stacking table 40 .

A distance L1 between the first position P1 and the second position P2 may be longer than the width L2 of the stacking table 40 .

The first position P1 and the second position P2 may be positions where the buffer roller 50 is moved past the upper side of the stacking table 40 .

The buffer roller 50 may be moved from the first position P1 to the second position P2, and conversely, from the second position P2 to the first position P1. The buffer roller 50 may be a traveling roller that moves along a traveling path between the first position P1 and the second position P2.

This travel path may be above the stacking table 40 .

The roller moving mechanism 60 may perform a first operation (first mode) of moving the buffer roller 50 from the first position P1 to the second position P2. The roller moving mechanism 60 may perform a second operation (second mode) of moving the buffer roller 50 from the second position P2 to the first position P1. The roller moving mechanism 60 may perform the first operation and the second operation alternately.

When the roller moving mechanism 60 alternately performs the first operation and the second operation, the buffer roller 50 may reciprocate between the first position P1 and the second position P2.

The roller moving mechanism 60 is a mechanism for reciprocating and linearly moving the buffer roller 50, and various mechanisms can be applied. An example of the roller moving mechanism 60 is a carrier 62 to which the buffer roller 50 is mounted, a screw 64 guided so that the carrier 62 is linearly moved, and a driving source 66 for rotating the screw 64. ) may be included.

The buffer roller 50 may be rotatably disposed on the carrier 62 and may move linearly together with the carrier 62 when the carrier 62 moves.

The carrier 62 may include a hollow portion through which the screw 64 passes, and a female screw may be formed on an inner circumference of the hollow portion.

A male screw that engages with the female screw of the carrier 62 may be formed on the outer circumference of the screw 64, and when the screw 64 rotates, the carrier 62 follows the screw 64 in the longitudinal direction of the screw 64. can be moved to

The driving source 66 may include a motor that rotates the screw 64 .

As long as the roller moving mechanism 60 is configured to linearly reciprocate the buffer roller 50, various configurations such as a linear motor can be applied.

The secondary battery stacking equipment 10 includes a first robot 70 that transports the positive electrode 2 to the separator 4 on the stacking table 40, and the negative electrode 3 on the stacking table 40. A second robot 80 that transports the separation membrane 4 may be included.

The first robot 70 may move the anode electrode 2 of the anode magazine 43 to the anode alignment table 41 .

The first robot 70 may move the anode electrode 2 onto the lamination table 40 and then place the anode electrode 2 on the separator 4 on the lamination table 40 .

The first robot 70 may move the anode electrode 2 of the anode alignment table 41 onto the lamination table 40, and the anode electrode 2 may be placed on the lamination table 40 and placed on the lamination unit 4c. ) can be moved upwards.

The second robot 80 may move the negative electrode 3 of the negative electrode magazine 44 to the negative electrode alignment table 42 .

The second robot 80 may move the cathode electrode 3 onto the stacking table 40 and then place the cathode electrode 3 on the separator 4 on the stacking table 40 .

The second robot 80 can move the cathode electrode 3 of the cathode alignment table 43 onto the lamination table 40, and the cathode electrode 3 is placed on the lamination table 40. ) can be moved upwards.

During the manufacture of the stack cell 1, the position and shape of the part 4c of the separator 4 may vary, and may vary according to the position of the buffer roller 50.

During the manufacture of the stack cell 1, the position and shape of the feeding unit 4b in the separator 4 may be changed by the buffer roller 50.

When the buffer roller 50 is located at the first position (P1) or the second position (P2), the load on the separator 4 may be large, and when the tension acting on the separator 4 is large, a vibration phenomenon occurs. may be torn or torn.

The secondary battery stacking equipment 10 may include a separator feeder 90 .

The separator feeder 90 may include a pair of rollers 91 and 92, and one of the pair of rollers 91 and 92 may be in contact with one surface of the separator 4, and one pair of rollers 91 and 92 may contact one surface of the separator 4. The other of the rollers 91 and 92 of may be in contact with the other surface of the separator 4.

The pair of rollers 91 and 92 may be rotated in opposite directions, and a portion of the separator 4 positioned between the pair of rollers 91 and 92 is the pair of rollers 91 and 92 ) can be forced out.

The separation membrane feeder 90 can minimize expansion of the separation membrane 4 due to tension, and can push the separation membrane 4 in the same direction as the running direction of the separation membrane 4 .

The separation membrane feeder 90 may forcibly push the separation membrane 4 to minimize shaking or tearing of the separation membrane 4 . When the separation membrane feeder 90 is operated, the portion 4c of the separation membrane 4 after the separation membrane feeder 90 is temporarily loosened, and tension acting on the separation membrane 4 may be reduced.

The separator feeder 90 is preferably positioned before the buffer roller 50 in the moving path of the separator 4, and forces the separator 4 to the previous position of the buffer roller 50 in the supply direction of the separator 4. can be transported.

The separator feeder 90 may be disposed between the guide roller 30 and the buffer roller 50 in the movement path of the separator 4 .

While the stack cell 1 is being manufactured, the separation membrane 4 is formed between the introduction part 4a located between the unwinder 20 and the separation membrane feeder 90 during the movement path of the separation membrane 4, and the stacking table 40 It can be divided into a layered portion 4b placed on top and a feeding portion 4c located between the introduction portion 4a and the layered portion 4b in the movement path of the separation membrane 4.

The feeding unit 4c may be defined as a portion that has passed through the separator feeder 90 but has not yet been placed on the stacking table 40 .

The stacking unit 4b may be defined as a portion of the separator 4 that has already been placed on the stacking table 40 after being in the state of the feeding unit 4c before being placed on the stacking table 40 .

While the stack cell 1 is being manufactured, the membrane feeder 90 is not continuously driven (on), and may alternately operate (on) and stop (off).

The separation membrane feeder 90 may travel the separation membrane 4 by a certain amount.

When the stack cell 1 is enlarged, the separator 4 is also enlarged, and the separator feeder 90 may be installed to correspond to the opposed separator 4.

Separator feeder 90 temporarily prevents a large load (or tension) from being applied to the rear part 4c of separator feeder 90 among separators 4, and stops (off) when the load on separator 4 is small. ), it is preferable to maintain the separation membrane 4 to have a predetermined range of tension.

Conversely, it is preferable that the separation membrane feeder 90 is driven (on) only when the load acting on the separation membrane 4 is large, thereby temporarily lowering the tension of the separation membrane 4 .

As shown in FIGS. 7 and 11 , the separator feeder 90 is driven while the buffer roller 50 is moved from the first position P1 to the second position P2 to feed the separator 4. can

An example of the separator feeder 90 is that the buffer roller 50 can be driven while moving from the first position P1 to the second position P2.

Another example of the separator feeder 90 is to maintain a stationary state when the buffer roller 50 is at the first position P1 and to the first set position while the buffer roller 50 moves toward the second position P2. It is possible that the drive starts when it reaches P3 and stops when the buffer roller 50 reaches the second position P2.

The first setting position P3 may be a position between the first position P1 and the second position P2. The first set position P3 may be closer to the second position P2 than the first position P1.

As described above, when the separation membrane feeder 90 is driven, the feeding unit 4c, which is the portion after the separation membrane feeder 90, of the separation membrane 4 starts before the buffer roller 50 reaches the second position P2. When the buffer roller 50 reaches the second position P2, the tension applied to the separator 4 is not large, and the buffer roller 50 reaches the second position P2 Vibration or tearing of the separator 4 that may occur can be minimized.

As shown in FIG. 9 , the separator feeder 90 may feed the separator 4 while the buffer roller 50 moves from the second position P2 to the first position P2.

One example of the separator feeder 90 is that the buffer roller 50 can be driven while moving from the second position P2 to the first position P1.

Another example of the separator feeder 90 maintains a stopped state when the buffer roller 50 is at the second position P2, starts driving when the buffer roller 50 reaches the second set position P4, and When the roller 50 reaches the first position P1, it is possible to stop it.

The second setting position P4 may be a position between the first position P1 and the second position P2. The second setting position P4 may be closer to the first position P1 than the second position P2.

As described above, when the separation membrane feeder 90 is driven, the feeding unit 4c, which is the portion after the separation membrane feeder 90, of the separation membrane 4 starts before the buffer roller 50 reaches the first position P1. When the buffer roller 50 reaches the first position P1, the tension applied to the separator 4 is not large, and the buffer roller 50 reaches the first position P1 Vibration or tearing of the separator 4 that may occur can be minimized.

Meanwhile, as shown in FIGS. 7 and 11 , the first robot 70 moves on the stacking table 40 while the buffer roller 50 moves from the first position P1 to the second position P2. It can be. The longer the buffer roller 50 and the first robot 70 operate together, the shorter the overall manufacturing time of the stack cell 1 can be.

As shown in FIG. 8 , when the movement of the buffer roller 50 to the second position P2 is completed, the first robot 70 may seat the anode electrode 2 on the separator 4 . In this case, the separator 4 does not interfere with the anode electrode 2, and the anode electrode 2 can be reliably seated on the separator 4.

Meanwhile, as shown in FIG. 5 , the second robot 80 is loading the cathode electrode 3 onto the stacking unit 4b on the stacking table 40, while the first robot 70 is holding the anode magazine 43 As shown in FIG. 8, while the first robot 70 lifts the anode electrode from the anode alignment table 41 to the stacking part 4b on the stacking table 40, , The new anode electrode lifted in the anode magazine 43 can be raised to the anode alignment table 41.

That is, the first robot 70 may simultaneously perform an operation of placing the anode electrode 2 on the stacking portion 4b on the stacking table 40 and an operation of placing a new anode electrode on the anode alignment table 41. And, the total manufacturing time of the stack cell 1 can be shortened.

Also, as shown in FIGS. 5 and 9 , the second robot 80 moves on the stacking table 40 while the buffer roller 50 moves from the second position P2 to the first position P1. It can be. The longer the buffer roller 50 and the second robot 80 operate together, the shorter the total manufacturing time of the stack cell 1 can be.

As shown in FIGS. 6 and 10 , when the buffer roller 50 is moved to the first position P1, the second robot 80 may seat the cathode electrode 3 on the separator 4. . In this case, the separator 4 does not interfere with the cathode electrode 3, and the cathode electrode 3 can be reliably seated on the separator 4.

Meanwhile, as shown in FIG. 8 , the first robot 70 places the anode electrode 3 on the stacking unit 4b on the stacking table 40, while the second robot 80 moves the cathode magazine 44 As shown in FIG. 10, while the second robot 80 lifts the cathode electrode from the cathode align table 42 to the stacking part 4b on the stacking table 40. , A new cathode electrode lifted in the cathode magazine 44 can be raised to the cathode align table 42.

That is, the second robot 80 may simultaneously perform an operation of placing the cathode electrode 3 on the stacking portion 4b on the stacking table 40 and an operation of placing a new cathode electrode on the cathode alignment table 42. And, the total manufacturing time of the stack cell 1 can be shortened.

The secondary battery stacking equipment 10 may further include a dancer roller 100 disposed between the guide roller 30 and the separator feeder 90 during the movement path of the separator 4 to maintain the tension of the separator 4 can

The dancer roller 100 may include a roller that moves along an arc-shaped trajectory around a central axis, and the introduction portion 4a of the separator 4 may be guided along the roller while maintaining tension.

The secondary battery stacking equipment 10 may further include a dancer roller 110 disposed between the separator feeder 90 and the buffer roller 50 in the movement path of the separator 4 to maintain the tension of the separator 4 can

The dancer roller 110 may include a roller that moves along an arc-shaped trajectory around a central axis, and the feeding unit 4c of the separator 4 may maintain tension while being guided along the roller.

A pair of dancer rollers 100 and 110 may be provided, and the pair of dancer rollers 100 and 100 are front dancer rollers previously disposed of the separator feeder 90 in the movement path of the separator 4 ( 100) and a rear dancer roller 1100 disposed after the separation membrane feeder 90 in the movement path of the separation membrane 4.

The dancer rollers 100 and 110 maintain the tension of the separation membrane 4, so that the separation membrane 4 travels obliquely in the forward travel path, which can be minimized.

FIG. 12 is a plan view of a separator according to an embodiment of the present invention when meandering, and FIG. 13 is a plan view of the separator shown in FIG. 12 when meandering travel is corrected.

The secondary battery stacking equipment 10 may further include a sensor 120 that detects the separator 4 .

The sensor 120 is a sensor capable of sensing the position of the separator 4, and may include, for example, a distance sensor such as an infrared distance sensor or an ultrasonic distance sensor.

The sensor 120 may be a meander detection sensor that detects meandering of the separator 4, and the meander detection sensor may measure the degree of meandering of the separator 4 and transmit the measured result to a controller (not shown). there is.

When the separation membrane 4 travels along the normal travel path, the separation membrane 4 sensed by the sensor 120 may travel within a set range.

When the impact applied to the separation membrane 4 is large, a portion of the separation membrane 4 may slide obliquely in the normal travel path (ie, the set range), and the sensor 120 can sense such separation membrane 4 .

When the position of the separator 4 detected by the sensor 120 is out of the set range, the secondary battery stacking equipment 10 moves the roller 91 constituting the separator feeder 90 in the longitudinal direction of the roller 91. (Y) may further include a roller moving mechanism 130 for moving.

The roller moving mechanism 130 may be driven by correction data transmitted from the controller.

The roller moving mechanism 130 may move the roller 91 so that the separator 4 outside the set range re-enters the set range.

The roller moving mechanism 130 is connected to the frame 94 on which the roller 91 is rotatably mounted so that the frame 94 can be linearly moved.

The roller moving mechanism 130 is not limited to that type, as long as it is configured to move the roller 91 of the separator feeder 90, and can include a screw and a motor that rotates the screw, a linear motor, etc. may consist of

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (13)

In the secondary battery stacking equipment for manufacturing a stack cell in which positive electrodes and negative electrodes are alternately disposed with a separator interposed therebetween,
An unwinder for winding the separator and supplying the separator;
at least one guide roller for guiding the separation membrane;
A stacking table in which anode electrodes and cathode electrodes are alternately disposed with the separator interposed therebetween;
a buffer roller for guiding the separation membrane;
a roller moving mechanism that alternately performs a first operation of moving the buffer roller from a first position to a second position and a second operation of moving the buffer roller from a second position to a first position;
A first robot that moves on the lamination table and then places the anode electrode on the separator on the lamination table;
A second robot that moves on the lamination table and then places the cathode electrode on the separator on the lamination table;
Including a separator feeder disposed between the guide roller and the buffer roller during the movement path of the separator
Secondary battery stacking equipment. According to claim 1,
The separator feeder feeds the separator while the buffer roller is moved from the first position to the second position. According to claim 1,
The separator feeder feeds the separator while the buffer roller is moved from the second position to the first position. According to claim 1,
The roller moving mechanism
a carrier on which the buffer roller is mounted;
A screw through which the carrier is guided for linear movement;
Secondary battery stacking equipment including a driving source for rotating the screw. According to claim 1,
Each of the first position and the second position is a secondary battery stacking equipment around the upper side of the stacking table. According to claim 1,
Secondary battery stacking equipment wherein the distance between the first position and the second position is longer than the width of the stacking table. According to claim 1,
The first robot
Secondary battery stacking equipment that is moved on the stacking table while the buffer roller is moved from the first position to the second position. According to claim 7,
The first robot is a secondary battery stacking equipment for seating the anode electrode on the separator when the buffer roller is finished moving to the second position. According to claim 1,
The second robot is moved on the stacking table while the buffer roller is moved from the second position to the first position. According to claim 9,
The second robot is a secondary battery stacking equipment for seating the cathode electrode on the separator when the buffer roller is completed moving to the first position. According to claim 1,
Secondary battery stacking equipment further comprising a dancer roller disposed between the guide roller and the separator feeder during the movement path of the separator to maintain tension of the separator. According to claim 1,
Secondary battery stacking equipment further comprising a dancer roller disposed between the separator feeder and the buffer roller during the movement path of the separator to maintain tension of the separator. According to claim 1,
A sensor for detecting the separation membrane;
Secondary battery stacking equipment further comprising a roller moving mechanism for moving a roller constituting the separator feeder in a longitudinal direction of the roller when the position of the separator detected by the sensor is out of a set range.

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