KR20230001210A - Separator Handling Apparatus for Stacking One-sided Eelectrode of Secondary Battery Cell And Method for Manufacturing Secondary Battery Cell Using the Same - Google Patents

Abstract

The present invention relates to a separator handling device for cross-sectional electrode stack of a secondary battery electrode assembly and a method of manufacturing secondary battery electrode assembly using the same, wherein the separator handling device provides a single-sided electrode for stacking to a stack table and the top of the stacking of an anode, a cathode, and a separator respectively, immediately before and after stacking the anode, cathode, and separator on the stack table. Accordingly, it is possible to shorten the manufacturing time of an electrode assembly with single-sided electrodes stacked at a bottom and top and improve work efficiency. The separator handling device for cross-sectional electrode stack of a secondary battery electrode assembly, according to the present invention, comprises: a head unit installed to move back and forth between a first position where a first electrode is stacked on a stack table and a second position where a second electrode is stacked on the stack table on an upper side of the stack table where the first electrode, the second electrode, and a separator are stacked; a separator holding unit installed in the head unit to hold an end of the separator after the uppermost cross-sectional electrode is stacked at the first position and to transfer the separator at the second position onto the lowermost cross-sectional electrode; and a separator cutting unit cutting the separator while the separator is held by the separator holding unit at the first position.

Description

Separator Handling Apparatus for Stacking One-sided Electrode of Secondary Battery Cell And Method for Manufacturing Secondary Battery Cell Using the Same}

The present invention relates to an apparatus for manufacturing a secondary battery electrode assembly, and more particularly, to manufacture a secondary battery electrode assembly by alternately stacking a positive electrode, a separator, and a negative electrode while interposing a separator between a plurality of positive electrodes and negative electrodes A separator handling device for a single-sided electrode stack of a secondary battery electrode assembly that handles a separator to stack single-sided electrodes coated with electrode active material on one surface of an electrode current collector at the top and bottom of the electrode assembly in the process, and a secondary battery electrode assembly using the same It's about manufacturing methods.

In general, a chemical battery is a battery composed of a pair of positive and negative electrodes and an electrolyte, and the amount of energy that can be stored varies depending on the materials constituting the electrode and the electrolyte. These chemical batteries are divided into primary batteries, which are used only for one-time discharge due to their very slow charging reaction, and secondary batteries, which can be reused through repeated charging and discharging. is on the rise.

That is, the secondary battery is applied to various technical fields throughout the industry due to its advantages, and is widely used as an energy source for advanced electronic devices such as wireless mobile devices, for example, as well as conventional gasoline using fossil fuels. It is also attracting attention as an energy source for hybrid electric vehicles, which are proposed as a solution to air pollution from diesel internal combustion engines.

Such a secondary battery is formed in a form in which a positive electrode, a separator, and a negative electrode are sequentially stacked and immersed in an electrolyte solution. There are two methods for manufacturing the inner cell (electrode assembly) of such a secondary battery.

In the case of small-sized secondary batteries, a method of arranging a negative electrode and a positive electrode on a separator and rolling them to form a jelly-roll is often used. A method of manufacturing by stacking a cathode, an anode, and a separator in an appropriate order is widely used.

There are several methods of manufacturing secondary battery internal cells in a stacked manner. Among them, in the Z-stacking method, separators (separators) are folded in a zigzag pattern, and the negative electrode and the positive electrode alternate between them. to be stacked in an inserted form.

A secondary battery internal cell made of such a Z-stacking form is disclosed in various prior arts such as Registered Patent No. 10-0313119 and Registered Patent No. 10-1140447.

In order to actually implement the Z-stacking form, in the prior art such as Korean Patent Registration No. 10-0309604, a plurality of cathodes are placed on one side of the separator in an unfolded state and a plurality of cathodes are placed on the other side, and then folded. are starting This method is also widely used in manufacturing the inner cell of a secondary battery in the form of a jelly-roll. However, when using this method, it is difficult to align the cathode and anode.

In recent years, in manufacturing a Z-folding stacked secondary battery electrode assembly, cathodes and anodes are stacked on a loading table spaced left and right, and the stage on which the cathode and anode are stacked is horizontally reciprocated between the loading tables. It is installed in such a way that the robot (manipulator) alternately picks up and transfers the cathode and anode on the loading table and alternately stacks them on the separator clamped on the stage.

In this conventional Z-stacking method, since the stage is stacked while linearly reciprocating left and right, the moving distance of the stage is long, so it takes a lot of work time, thereby reducing productivity.

Accordingly, in Registered Patent No. 10-1956758, the tilting table is reciprocally rotated at a predetermined angle in both directions around a horizontal axis with respect to the ground. An electrode assembly is manufactured by alternately stacking a separator, a cathode, and an anode on the tilting table By doing so, an apparatus for manufacturing a secondary battery electrode assembly capable of reducing working time is disclosed.

On the other hand, recently, an electrode assembly having a laminated structure in which single-sided electrodes (single-sided anode or single-sided cathode) coated with electrode active material on one surface of an electrode current collector at the top and bottom of the electrode assembly is exposed to the outside has been developed and commercialized. With a conventional electrode assembly manufacturing apparatus such as the electrode assembly manufacturing apparatus of Patent No. 10-1956758, it is impossible to laminate single-sided electrodes on the upper and lower ends of the electrode assembly wrapped by a separator. Next, since the single-sided electrodes are manually laminated on the top and bottom ends of the electrode assembly, there is a problem that it takes a long time and the work efficiency is significantly reduced.

Republic of Korea Patent Registration No. 10-1140447 (registered on April 19, 2012) Republic of Korea Patent Registration No. 10-0309604 (registered on September 10, 2001) Korean Registered Patent No. 10-1956758 (registered on March 5, 2019)

The present invention is to solve the above conventional problems, and an object of the present invention is to place the uppermost layer of the stack table and the positive electrode-cathode-separator layer immediately before and after stacking the positive electrode, the negative electrode, and the separator on the stack table, respectively. A separator handling device for a single-sided electrode stack of a secondary battery electrode assembly capable of reducing the manufacturing time of an electrode assembly in which single-sided electrodes are stacked at the bottom and top and improving work efficiency by supplying and stacking single-sided electrodes, and using the same It is to provide a method for manufacturing a secondary battery electrode assembly.

Separator handling device for single-sided electrode stack of a secondary battery electrode assembly according to the present invention for achieving the above object is a stack table in which a first electrode, a second electrode, and a separator are stacked, and the first electrode is stacked on top of the stack table. a head unit installed to be reciprocally movable between a first position where the second electrode is stacked on the table and a second position where the second electrode is stacked on the stack table; a separation membrane holding unit installed in the head unit, holding an end of the separation membrane after the uppermost end-face electrode is stacked at a first position, and transferring the separation membrane onto the lowermost end-face electrode at a second position; and a separation membrane cutting unit cutting the separation membrane in a state where the separation membrane is held by the separation membrane holding unit at the first position.

The head unit may be moved to the first position and the second position while swinging at a predetermined angle around a rotation axis horizontal to the ground by a rotation unit.

The separation membrane holding unit includes a lifting bracket installed to be movable up and down by a linear motion device in the head part, a fixed suction plate fixedly installed to the lifting bracket to vacuum the separation membrane, and both sides of the fixed suction plate. A movable adsorption plate disposed to be movable up and down on the elevating bracket to vacuum-adsorb the separation membrane, and an elevating actuator that moves the movable adsorption plate up and down with respect to the elevating bracket, wherein the movable adsorption plate has a lowermost end face at a second position Immediately after placing the separator on the electrode, it can be raised on the lifting bracket.

The head unit includes a swing block connected to a motor of the rotation unit and swinging at a certain angle, a swing guide member rotatably supporting the swing block and having an arc-shaped rail groove formed along the rotational trajectory of the swing block, It may include forward and backward brackets installed in the swing block to be movable toward the stack table, and forward and backward actuators that move the forward and backward brackets in directions approaching and away from the stack table.

The separator cutting unit includes a cutter mount block installed on the upper side of the first position, and is installed to be movable up and down on the cutter mount block, and descends while the separator is held by the separator holding part at the first position to cut the separator. It may include a cutter for cutting.

The stack table rotates reciprocally in a predetermined angular range in both directions about an axis perpendicular to the ground centered on a rotation axis horizontal to the ground, and the first electrode and the second electrode are positioned at the first and second positions. It is received from the picker unit, and a plurality of grippers for pressurizing and fixing both sides of the first and second electrodes stacked on the upper surface of the stack table and the separator may be installed on the upper surface of the stack table.

A method for manufacturing a secondary battery electrode assembly using a separator handling device for single-sided electrode stacks of a secondary battery electrode assembly according to the present invention,

(S1) seating the lowermost single-sided electrode on the stack table at the first position or the second position;

(S2) stacking the separation membrane held by the separation membrane holding unit at the second position on the lowermost single-sided electrode on the stack table;

(S3) moving the stack table to a first position and stacking the first electrode by placing the first electrode on the separator at the first position;

(S4) moving the stack table to a second position, and stacking a second electrode by placing the second electrode on the separator at the second position;

(S5) continuously and repeatedly performing the steps (S3) and (S4) a predetermined number of times to alternately laminate the first electrode and the second electrode on the separator;

(S6) completing the electrode assembly by laminating the uppermost single-sided electrode on the separator at the first position when the step (S5) is completed;

(S7) moving the head unit to a first position and holding the separator with a separator holding unit;

(S8) cutting the separator with a separator cutting unit;

(S9) the unloading robot discharging the completed electrode assembly on the stack table; and,

(S10) moving the head unit to a second position and sequentially repeating steps (S1) to (S9);

can include

The stack table rotates reciprocally in a predetermined angular range in both directions about an axis perpendicular to the ground centered on a rotation axis horizontal to the ground, and the first electrode and the second electrode are positioned at the first and second positions. It is received from the picker unit, and the head unit can be moved to the first position and the second position while swinging at a predetermined angle around a rotational axis horizontal to the ground by a rotation unit.

In the step (S2),

(S2-1) moving the lifting bracket downward in a state in which the separation membrane is vacuum-adsorbed by the fixed adsorption plate and the movable adsorption plate of the separation membrane holding unit to seat the separation membrane on the stack table;

(S2-2) breaking the vacuum of the movable adsorption plate and raising the movable adsorption plate;

(S2-3) approaching the grippers of the stack table to both sides of the fixed adsorption plate to press and fix both sides of the separation membrane;

(S2-4) breaking the vacuum state of the fixed adsorption plate and raising the elevating bracket; and,

(S2-5) lowering the movable adsorption plate to its original position;

can include

According to the present invention, when the stack table rotates reciprocally at a certain angle and moves to the first position and the second position, after the electrode assembly is completed on the stack table at the first position, the separator handling device grips and cuts the separator, and then , it swings to the second position on the opposite side, and at the second position, the separator held by the lowermost single-sided electrode on the stack table is transferred and stacked.

Therefore, since the electrode assembly can be manufactured by automatically stacking the lowermost end-face electrode and the uppermost end-face electrode on the stack table, the manufacture of the secondary battery electrode assembly having the end-face electrodes at the top and the bottom can be made very quickly and efficiently.

1 is a cross-sectional view schematically showing an example of a secondary battery electrode assembly having single-sided electrodes at the uppermost and lowermost ends.
FIG. 2 is a front view showing an embodiment of a secondary battery electrode assembly manufacturing apparatus of the present invention for manufacturing a secondary battery electrode assembly as shown in FIG. 1 .
FIG. 3 is a front view schematically showing the main components of the apparatus for manufacturing a secondary battery electrode assembly shown in FIG. 2 .
4A and 4B are diagrams illustrating an operation example in which electrodes are stacked in the secondary battery electrode assembly manufacturing apparatus shown in FIG. 2 .
FIG. 5 is a perspective view illustrating an embodiment of a separator handling device constituting the secondary battery electrode assembly manufacturing device shown in FIG. 2 .
6A and 6B are front views showing configuration and operation examples of the separator handling device shown in FIG. 5 .
FIG. 7 is a view sequentially illustrating an operating method of the separator handling apparatus shown in FIG. 5 .
FIG. 8 is a schematic diagram sequentially explaining a method of manufacturing a secondary battery electrode assembly using the separator handling device shown in FIG. 5 .
9 is a schematic view illustrating an operation example of a separator holding unit in the process of performing the method of manufacturing a secondary battery electrode assembly of FIG. 8 .

The embodiments described in this specification and the configurations shown in the drawings are only one preferred example of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings in this specification at the time of filing of the present application.

Hereinafter, with reference to the accompanying drawings, a separator handling device for a single-sided electrode stack of a secondary battery electrode assembly and a method of manufacturing a secondary battery electrode assembly using the same will be described in detail according to the following embodiments. Like symbols in the drawings indicate like components.

1 shows an example of a secondary battery electrode assembly having single-sided electrodes at the top and bottom ends, and the secondary pre-electrode assembly 10 is stacked while the separator 4 is continuously folded in a zigzag pattern, and the separator folded in a zigzag pattern. (4) It is a laminate having a structure in which a plurality of first electrodes 1 and a plurality of second electrodes 2 are alternately stacked, and single-sided electrodes 3a and 3b are stacked at the top and bottom, respectively. Here, the first electrode 1 and the second electrode 2 of the electrode assembly 10 are electrodes coated with an electrode active material on both surfaces, and the end electrodes 3a and 3b are electrodes coated with an electrode active material only on one surface.

2 to 4A, the secondary battery electrode assembly manufacturing apparatus to which the separator handling apparatus according to an embodiment of the present invention is applied is centered on a rotational axis 111 horizontal to the ground with respect to the ground A stack table 110 reciprocating in a constant angular range in both directions with respect to a vertical axis, and a first electrode 1 and a second electrode 2 on top of the stack table 110 on both sides of the stack table 110 The first picker unit 120 and the second picker unit 130 respectively deliver the , the separation membrane supply unit supplying the separation membrane 4 to the upper side of the stack table 110, and the lowermost single-sided electrode on the stack table 110 (3a) and the uppermost single-sided electrode 3b are laminated, and then supplying the separator 4 or cutting the separator 4 includes a separator handling device 200.

Separator 4 - first electrode 1 - separator 4 - second electrode 2 are continuously and repeatedly stacked on the upper surface of the stack table 110 to form a stack, and the lowermost and uppermost layers of the stacked body are formed. The final secondary battery electrode assembly 10 is completed by stacking the single-sided electrodes 3a and 3b, respectively.

Although not shown in the drawing, a plurality of vacuum holes are formed on the upper surface of the stack table 110 so as to be open upward so that the single-sided electrodes 3a and 3b and the separation membrane 4 can be fixed using a vacuum adsorption method.

The stack table 110 rotates reciprocally in a constant angular range in both directions about an axis perpendicular to the ground centered on the rotation shaft 111 by a rotation unit including a motor 216, and at the end point of the rotation range, the first stack table 110 The first electrode 1 and the second electrode 2 are alternately received from the picker unit 120 and the second picker unit 130 and stacked on the separator 4 . Here, the point at which the stack table 110 rotates in one direction to receive the first electrode 1 from the first picker unit 120 is referred to as the first position P1, and the stack table 110 rotates in the opposite direction. The point at which the second electrode 2 is received from the second picker unit 130 is defined as the second position P2 and will be described.

In addition, on the upper surface of the stack table 110, a plurality of grippers ( 112) is installed. The plurality of grippers 112 horizontally move in and out of the stack table 110, and while the first electrode 1, the second electrode 2, and the separator 4 are stacked on the upper surface of the stack table 110, It moves to the outside of the stack table 110 to prevent interference, and immediately after the first electrode 1, the second electrode 2, and the separator 4 are stacked on the upper surface of the stack table 110, the stack table ( 110), and then move downward to fix the first electrode 1, the second electrode 2, and the separator 4 by pressing them downward.

The first picker unit 120 and the second picker unit 130 transport the first electrode 1 and the second electrode 2 placed on a separate table for vision inspection and alignment onto the stack table 110. It is configured to be stacked by stacking, and can be configured by applying an electrode pick-up and place picker device used in a known secondary battery manufacturing apparatus.

The first picker unit 120 and the second picker unit 130 can be stacked by transferring the anode as the first electrode 1 and the cathode as the second electrode 2 onto the stack table 110, but in the opposite way A cathode as the first electrode 1 and an anode as the second electrode 2 may be transferred onto the stack table 110 and stacked. In addition, either one of the first picker unit 120 and the second picker unit 130 or both of the first picker unit 120 and the second picker unit 130 are placed on the stack table 110, the single-sided electrode 3a, 3b) can also be transferred and laminated. At this time, the single-sided electrodes 3a and 3b may be single-sided positive electrodes or single-sided negative electrodes having an electrode active material coated on one side thereof. In order to facilitate understanding of the present invention, hereinafter, the single-sided electrodes 3a and 3b stacked on the lowermost side of the stack table 110 and disposed on the lowermost side of the electrode assembly 10 are referred to as the lowermost single-sided electrodes 3a, and the stack table ( 110), the single-sided electrodes 3a and 3b stacked on the top of the electrode assembly 10 stacked on the top are referred to as the uppermost single-sided electrode 3b.

The separation membrane supply unit includes an unwinder 140 in which a separation membrane reel 4a on which a separation membrane 4 made of a long film is wound is rotatably installed, and a separation membrane reel disposed above the center of the stack table 110 and It includes a pair of membrane guide rolls 142 that guide the separation membrane 4 released in 4a) to the stack table 110.

5 to 9, the separator handling device 200 swings in a certain angular range between the first position P1 and the second position P2 on the upper side of the stack table 110 while moving After the head part 210 installed to be reciprocating and the uppermost single-sided electrode 3b installed on the head part 210 at the first position P1 are stacked, the end of the separator 4 is gripped, The separation membrane holding unit 220 for transferring and stacking the separation membrane 4 on the lowermost single-sided electrode 3a at the second position P2, and the separation membrane 4 at the first position P1 on the separation membrane holding unit 220 It includes a separator cutting unit 250 that cuts the separator 4 in the gripped state.

The head part 210 is connected to the motor 216 constituting the rotation unit and swings at a certain angle, and the swing block 211 rotatably supports the swing block 211 and rotates the swing block 211 A swing guide member 212 in which an arc-shaped rail groove 213 is formed along the swing block 211, a forward and backward bracket 215 installed to be movable toward the stack table 110, and the front and back It includes forward and backward actuators 214 such as pneumatic cylinders that move the jean bracket 215 in directions approaching and away from the stack table 110.

The separation membrane holding unit 220 includes a lifting bracket 221 installed to be movable up and down by a linear movement device such as a pneumatic cylinder 222 on the forward and backward bracket 215 of the head unit 210, and the lifting bracket A fixed adsorption plate 224 fixedly installed on the 221 to vacuum the separation membrane 4, and a separation membrane movable up and down on the lifting bracket 221 on both sides of the fixed adsorption plate 224 4) includes two movable adsorption plates 225 for vacuum adsorption and a lift actuator 226 for moving the movable adsorption plates 225 up and down with respect to the elevating bracket 221 .

The fixed adsorption plate 224 and the movable adsorption plate 225 are connected to a vacuum generating means such as a vacuum pump (not shown) to fix the separation membrane 4 in a vacuum adsorption method. In addition, two movable adsorption plates 225 are disposed on both sides of the fixed adsorption plate 224, and are installed to be movable up and down with respect to the fixed adsorption plate 224, so that at the second position P2, the lowermost end-face electrode ( 3a) Immediately after placing the separation membrane 4 on the bed, it rises with respect to the fixed adsorption plate 224 on the elevating bracket 221 so that the gripper 112 of the stack table 110 enters and fixes the separation membrane 4. (see Figure 9).

The separation membrane cutting unit 250 is configured to be separated from the head unit 210 and the separation membrane holding unit 220 and is installed above the first position P1. In this embodiment, the separator cutting unit 250 has a cutter mount block 251 fixedly installed on the upper side of the first position P1 and vertically movable on the cutter mount block 251 to be installed at the first position In (P1), the separation membrane 4 is lowered while being held by the separation membrane holding unit 220, and includes a cutter 252 cutting the separation membrane 4. The cutter 252 is installed to move up and down at a certain distance by a linear motion device such as a pneumatic cylinder (not shown) installed on the cutter mount block 251, and a known cutter having a sharp blade formed at the lower end can be applied and configured. Since the separator 4 and the first electrode 1 are stacked with the stack table 110 tilted at a predetermined angle at the first position P1, the cutter 252 is perpendicular to the separator 4. It is preferable that the cutter 252 cuts the separator 4 while moving in a line inclined at a predetermined angle with respect to the ground so that the separator 4 can be cut while moving.

A method of manufacturing a secondary battery electrode assembly using the separator handling device configured as described above will be described with reference to FIGS. 7 and 8 .

In a state where nothing is stacked on the upper surface of the stack table 110, the stack table 110 is centered on the rotational axis 111 horizontal to the ground at a constant angle in one direction with respect to the axis perpendicular to the ground. When it rotates and reaches the first position (P1) or the second position (P2), the first picker unit 120 or the second picker unit 130 moves from the first position (P1) or the second position (P2). The lowermost single-sided electrode is seated on the upper surface of the stack table 110 (step S1).

At this time, while holding the end of the separator 4 in the separator holding unit 220 of the separator handling device 200, the stack table 110 on which the lowermost single-sided electrode 3a is stacked is in the second position P2. , the separator 4 is stacked on the lowermost single-sided electrode 3a on the stack table 110 (step S2). This step may proceed as follows.

While the separation membrane 4 is vacuum-sucked by the fixed adsorption plate 224 and the movable adsorption plate 225 of the membrane holding unit 220, the lifting bracket 221 is moved downward to move the separation membrane 4 to the stack table 110. ) (step S2-1). Subsequently, the vacuum state of the movable adsorption plate 225 is broken and the movable adsorption plate 225 is raised a certain distance to separate it from the separation membrane 4 (step S2-2).

Then, the gripper 112 of the stack table 110 approaches both sides of the fixed adsorption plate 224 to press and fix both sides of the separation membrane 4 (step S2-3).

Then, the vacuum state of the fixed adsorption plate 224 is broken, the elevating bracket 221 is raised (step S2-4), and the movable adsorption plate 225 is lowered and returned to its original position (step S2-5).

In this way, the membrane holding unit 220 is constituted by being separated into a fixed adsorption plate 224 in the center and a movable adsorption plate 225 on both sides, and the movable adsorption plate 225 has a relative movement with respect to the fixed adsorption plate 224. When the separator 4 is stacked on the lowermost single-sided electrode 3a, the separator 4 is smoothly gripped by the gripper 112 of the stack table 110, so that a stable electrode assembly stacking operation can be performed.

As described above, after stacking the lowermost single-sided electrode 3a and the separator 4 on the stack table 110, the stack table 110 is rotated around the rotation shaft 111 to return to the first position P1. Then, at the first position P1, the first picker unit 120 places the first electrode 1 on the separator 4 and stacks them (step S3).

Subsequently, the stack table 110 is rotated to the opposite side and moved to the second position P2, and the second electrode 2 is seated on the separator 4 with the second picker unit 130 at the second position P2. and stacked (step S4).

In this way, the stack table 110 is continuously and repeatedly moved to the first position P1 and the second position P2 while rotating the stack table 110 left and right around the rotation shaft 111 in a certain angular range, and The first electrode 1 and the second electrode 2 are delivered to the stack table 110 by the first picker unit 120 and the second picker unit 130, and are alternately stacked on the separator 4 (step S5 ).

When all of the first electrodes 1 and the second electrodes 2 of a predetermined number are stacked, the uppermost single-sided electrode 3b is stacked at the top of the stack at the first position P1 or the second position P2. The electrode assembly 10 is completed by stacking on the separator 4 (step S6).

When the electrode assembly 10 is completed by placing the uppermost single-sided electrode 3b on the stack table 110, the head unit 210 of the separator handling device 200 swings by using the motor 216 of the rotation unit. and move it to the first position (P1). Subsequently, the forward and backward actuator 214 of the head unit 210 is operated to move the forward and backward bracket 215 toward the stack table 110, and then the pneumatic cylinder 222 of the membrane holding unit 220 is operated to lift the bracket 221 is raised to bring the fixed adsorption plate 224 and the movable adsorption plate 225 into contact with the separation membrane 4, and vacuum pressure is generated to vacuum the separation membrane 4 (step S7).

Subsequently, the cutter 252 of the separator cutting unit 250 is lowered to cut the separator 4 so that the electrode assembly 10 of the stack table 110 is separated from the separator 4 (step S8).

An external unloading robot (not shown) approaches the stack table 110, grabs the completed electrode assembly 10 on the stack table 110, and then moves to the outside and discharges it to a predetermined process location (step S9). . Accordingly, the upper surface of the stack table 110 becomes empty.

When the electrode assembly 10 is discharged from the stack table 110, the head part 210 of the separator handling device 200 is moved to the second position P2 by swinging again, and moves to the first position P1 or Steps (S1) to (S9) are sequentially and repeatedly performed while placing the lowermost single-sided electrode 3a on the stack table 110 at the second position (P2).

As described above, in the separator handling device 200 of the present invention, when the stack table 110 reciprocates at a predetermined angle and moves to the first position P1 and the second position P2, the stack table 110 moves from the first position P1 to the second position P1. After the electrode assembly 10 is completed on the 110, the separation membrane 4 is gripped and cut, and then swinging to the second position P2 on the opposite side to the stack table 110 at the second position P2. The separation membrane 4 held by the lowermost single-sided electrode 3a can be conveyed and stacked.

Therefore, since the electrode assembly 10 can be manufactured by automatically stacking the lowermost single-sided electrode 3a and the uppermost single-sided electrode 3b on the stack table 110, the electrode assembly 10 having the single-sided electrodes 3a and 3b Manufacturing can be done very quickly and efficiently.

In the above, the technical idea of the present invention has been described with the accompanying drawings, but this is an illustrative example of a preferred embodiment of the present invention, but does not limit the present invention. In addition, it is obvious that various modifications and imitations can be made by anyone having ordinary knowledge in the technical field to which the present invention belongs without departing from the scope of the technical idea of the present invention.

P1: 1st position P2: 2nd position
1: first electrode 2: second electrode
3a: lowermost end-face electrode 3b: uppermost end-face electrode
4: separator 4a: separator reel
10: electrode assembly 110: stack table
111: rotation shaft 112: gripper
120: first picker unit 130: second picker unit
140: unwinder 142: membrane guide roll
200: membrane handling device 210: head unit
211: swing block 212: swing guide member
213: rail home 214: forward and backward actuator
215: forward and backward bracket 216: motor
220: membrane holding unit 221: lifting bracket
222: pneumatic cylinder 224: fixed suction plate
225: movable adsorption plate 226: lifting actuator
250: separator cutting unit 251: cutter mount block
252: cutter

Claims (9)

On the upper side of the stack table where the first electrode, second electrode and separator are stacked, it is possible to reciprocate between a first position where the first electrode is stacked on the stack table and a second position where the second electrode is stacked on the stack table. A head portion that is installed to be;
a separation membrane holding unit installed in the head unit, holding an end of the separation membrane after the uppermost end-face electrode is stacked at a first position, and transferring the separation membrane onto the lowermost end-face electrode at a second position; and,
a separation membrane cutting unit cutting the separation membrane in a state where the separation membrane is held by the separation membrane holding unit at the first position;
A separator handling device for a single-sided electrode stack of a secondary battery electrode assembly comprising a. The cross-section of the secondary battery electrode assembly of claim 1, wherein the head unit moves to the first position and the second position while swinging at a predetermined angle around a rotation axis horizontal to the ground by a rotation unit. Separator handling device for electrode stack. The fixed suction plate of claim 1, wherein the separation membrane holding unit includes a lifting bracket installed to be movable up and down by a linear motion device on the head unit, a fixed suction plate installed to be fixed to the lifting bracket and vacuum-sucking the separation membrane, and the fixed suction plate. A movable adsorption plate disposed on both sides of the adsorption plate to be movable up and down on the elevating bracket to vacuum the separation membrane, and an elevating actuator that moves the movable adsorption plate up and down with respect to the elevating bracket,
The movable adsorption plate is a separator handling device for a single-sided electrode stack of a secondary battery electrode assembly that rises with respect to the lifting bracket immediately after placing the separator on the lowermost single-sided electrode in the second position. 3. The method of claim 2, wherein the head unit is connected to a motor of the rotation unit and swings at a certain angle, and a swing block rotatably supports the swing block and has an arc-shaped rail groove formed along the rotational trajectory of the swing block. A secondary battery electrode assembly including a swing guide member, forward and backward brackets movably installed on the swing block toward the stack table, and forward and backward actuators that move the forward and backward brackets in directions approaching and away from the stack table Membrane handling device for single-sided electrode stack. The method of claim 1, wherein the separator cutting unit includes a cutter mount block installed above the first position, and vertically movable on the cutter mount block, so that the separator is gripped by the separator holding unit at the first position. A separator handling device for a single-sided electrode stack of a secondary battery electrode assembly including a cutter that cuts the separator by descending from the state. The method of claim 1 , wherein the stack table reciprocates in a predetermined angular range in both directions about an axis perpendicular to the ground around a rotation axis horizontal to the ground, while maintaining a first position at a first position and a second position. The electrode and the second electrode are received from the picker unit, and a plurality of grippers are installed on the upper surface of the stack table to press and fix the first and second electrodes stacked on the upper surface of the stack table and both sides of the separator. Membrane handling device for assembly single-sided electrode stack. A method of manufacturing a secondary battery electrode assembly using the separator handling device for single-sided electrode stacks of a secondary battery electrode assembly according to any one of claims 1 to 6,
(S1) seating the lowermost single-sided electrode on the stack table at the first position or the second position;
(S2) stacking the separation membrane held by the separation membrane holding unit at the second position on the lowermost single-sided electrode on the stack table;
(S3) moving the stack table to a first position and stacking the first electrode by placing the first electrode on the separator at the first position;
(S4) moving the stack table to a second position, and stacking a second electrode by placing the second electrode on the separator at the second position;
(S5) continuously and repeatedly performing the steps (S3) and (S4) a predetermined number of times to alternately laminate the first electrode and the second electrode on the separator;
(S6) completing the electrode assembly by stacking the uppermost single-sided electrode on the separator at the first position when the step (S5) is completed;
(S7) moving the head unit to a first position and holding the separator with a separator holding unit;
(S8) cutting the separator with a separator cutting unit;
(S9) the unloading robot discharging the completed electrode assembly on the stack table; and,
(S10) moving the head unit to a second position and sequentially repeating steps (S1) to (S9);
Method for manufacturing a secondary battery electrode assembly comprising a. 8. The method of claim 7, wherein the stack table rotates reciprocally in a predetermined angular range in both directions about an axis perpendicular to the ground around a rotation axis horizontal to the ground as a center, while maintaining a first position at a first position and a second position. The electrode and the second electrode are received from the picker unit,
The secondary battery electrode assembly manufacturing method in which the head unit moves to the first position and the second position while swinging at a predetermined angle around a rotation axis horizontal to the ground by a rotation unit. The method of claim 8, wherein the (S2) step,
(S2-1) moving the lifting bracket downward in a state in which the separation membrane is vacuum-adsorbed by the fixed adsorption plate and the movable adsorption plate of the separation membrane holding unit to seat the separation membrane on the stack table;
(S2-2) breaking the vacuum of the movable adsorption plate and raising the movable adsorption plate;
(S2-3) approaching the grippers of the stack table to both sides of the fixed adsorption plate to press and fix both sides of the separation membrane;
(S2-4) breaking the vacuum state of the fixed adsorption plate and raising the elevating bracket; and,
(S2-5) lowering the movable adsorption plate to its original position;
Method for manufacturing a secondary battery electrode assembly comprising a.

Images