KR102322077B1 - Secondary battery stacking device with folding plate - Google Patents

Abstract

The present invention relates to a secondary battery stacking device with a folding plate, and more specifically, to a secondary battery stacking device capable of stacking a positive electrode thin plate, a negative electrode thin plate and a separator by a folding operation of a first folding plate and a second folding plate capable of hinge rotation on an upper part of a fixed base plate. The secondary battery stacking device comprises: a folding unit having a fixed plate so that the separator, the positive electrode thin plate, the negative electrode thin plate are stacked, and a plurality of folding plates capable of hinge rotation; and a clamp unit capable of fixing the positive electrode thin plate, the negative electrode thin plate, and the separator when the positive electrode thin plate, the negative electrode thin plate, and the separator are stacked on an upper part of the fixed plate by being coupled to the folding unit.

Description

Secondary battery stacking device with folding plate {Secondary battery stacking device with folding plate}

The present invention relates to a secondary battery stacking device having a folding plate. More specifically, on the upper side of the fixed base plate, a folding plate capable of stacking a positive electrode thin plate, a negative electrode thin plate and a separator (separator) by the folding operation of the first folding plate and the second folding plate capable of hinge rotation. It relates to a secondary battery stacking device provided.

A secondary battery is a chemical battery that can repeat charging and discharging using reversible interconversion of chemical energy and electrical energy.

High-performance secondary batteries include Ni-MH secondary batteries and lithium secondary batteries, and lithium secondary batteries include lithium metal secondary batteries, lithium ion secondary batteries (prismatic, cylindrical, pouch-type), and lithium ion polymer secondary batteries. , and lithium polymer secondary batteries.

Recently, with the commercialization of electric vehicles, research on automation equipment for mass production of large-sized lithium secondary batteries for electric vehicles is being actively conducted.

Among lithium ion secondary batteries, in particular, pouch-type batteries are easily deformable in shape, have low manufacturing costs, and are small in weight, so the demand for pouch-type batteries is increasing.

There are two main methods for manufacturing the cell stack inside the secondary battery. In the case of a small secondary battery, the negative and positive plates are placed on a separator and rolled up to form a jelly roll, and in the case of a medium-to-large secondary battery with more electric capacity, the negative plate, positive plate, and separator are in the proper order. A method of stacking and manufacturing is widely used.

There are several ways to fabricate a cell stack inside a secondary battery in a stacked manner. Among them, in the Z-folding method, the separator is folded in a zigzag manner, and the anode plate and the cathode plate are alternately stacked therebetween.

In the conventional lamination method, since the positive electrode plate and the negative electrode plate are laminated one by one, the time taken to complete one cell stack is very long, and thus there is a problem in that productivity is significantly reduced.

Therefore, in order to improve the alignment of the stacked positive and negative plates and increase the production rate, the development of cell stack technology with excellent productivity is required.

Prior art literature: KR Registered Patent Publication No. 10-1858680 (2018.05.16. Announcement)

The present invention has been devised to solve the above problems, and is stacked in a folding method using a base plate, a first folding plate and a second folding plate. An object of the present invention is to provide a secondary battery stacking device having a folding plate.

A secondary battery stacking device having a folding plate according to the present invention devised to achieve the above object is a separator, a plate fixed so that the thin positive plate and the thin negative electrode can be stacked, and a plurality of folding plates that can be hinged A folding unit having a; and a clamp unit capable of fixing the anode thin plate, the anode thin plate and the separator when the anode thin plate, the anode thin plate and the separator are stacked on the upper side of the plate fixedly coupled to the folding unit.

In addition, the folding unit may include: a first folding plate capable of mounting the anode thin plate or the anode thin plate on the upper side; a second folding plate capable of mounting the anode thin plate or the anode thin plate on the upper side; a base plate on which a thin anode plate, a thin cathode plate and a separator can be stacked on the upper side; a separator supply unit positioned above the first folding plate, the second folding plate, and the base plate and capable of supplying a separator; Equipped with a power device including a servomotor, the folding driving part to rotate the first and second folding plates and the base plate to the plate height in response to the stacking height of the thin anode plate, the thin cathode plate and the separator on the base plate includes a control unit.

In addition, the first folding plate, the second folding plate and the base plate have a plurality of through holes formed on the upper surface where the anode thin plate, the cathode thin plate and the separator can be located, and the plurality of through holes are connected to a vacuum suction device and a blower device. include what is

According to the present invention, it is possible to minimize the springback phenomenon in the cell folding process of the pouch-type secondary battery, and there is an effect that can increase the efficiency of the process.

1 is a perspective view showing the overall configuration of a secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention;
2 is a view showing that the first folding plate is folded;
3 is a view showing that the second folding plate is folded;
4 is a view showing a process in which the first folding plate and the second folding plate are folded and the negative electrode plate, the separator and the positive electrode plate are stacked on the upper surface of the base plate;
5 is a view showing a clamp unit;
6 is a view showing a base plate and a plate height control unit;
7 is a flowchart illustrating an operation method of a secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical spirit of the present invention is not limited thereto and may be variously implemented by those skilled in the art without being limited thereto.

1 is a perspective view showing the overall configuration of a secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention, FIG. 2 is a view showing the first folding plate is folded, Figure 3 is the second A view showing that the folding plate is folded, FIG. 4 is a view showing a process in which the first folding plate and the second folding plate are folded and a negative electrode plate, a separator and a positive electrode plate are stacked on the upper surface of the base plate, FIG. 5 is a clamp unit One drawing, FIG. 6 is a view showing a base plate and a plate height control unit, and FIG. 7 is a flowchart illustrating an operation method of a secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention.

A secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention includes a folding unit 100 , a clamp unit 200 , and a lifting unit 300 .

1, the folding unit 100 includes a first folding plate 110a, a second folding plate 110b, a base plate 120, a separator supply unit 500, a folding driving unit 130, a plate height control unit ( 140 , and the clamp unit 200 includes a clamp unit 210 , and a clamp driving unit 220 .

Hereinafter, components of a secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention will be described in detail.

The present invention relates to a secondary battery stacking device capable of alternately stacking a positive electrode plate, a separator (separator), and a negative electrode plate in manufacturing a secondary battery.

1, the folding unit 100 is a first folding plate 110a, a second folding plate 110b, a base plate 120, a separator supply unit 500, a folding drive unit 130, a plate height control unit ( 140) is included.

The first folding plate 110a can mount a thin anode plate or a thin cathode plate on its upper surface, and a plurality of through holes are formed on the upper surface, and the plurality of through holes are connected to a vacuum suction device and a blower device, so that the first folding plate When the thin anode or thin anode plate is located on the upper surface of (110a), the position of the thin anode or thin plate can be fixed by sucking air from the through hole. By discharging, the anode thin plate or the anode thin plate can be separated from the first folding plate.

The second folding plate 110b can mount a thin anode plate or a thin cathode plate on its upper surface, and a plurality of through holes are formed on the upper surface, and the plurality of through holes are connected to a vacuum suction device and a blower device, so that the first folding plate When the thin anode or thin anode plate is located on the upper surface of (110b), the position of the thin anode or thin plate can be fixed by sucking air from the through hole. By discharging, the anode thin plate or the anode thin plate can be separated from the first folding plate.

The base plate 120 is positioned between the first folding plate 110a and the second folding plate 110b, and a positive electrode thin plate, a negative electrode thin plate and a separator can be stacked on the upper surface, and a plurality of through holes are formed on the upper surface. In addition, the plurality of through holes are connected to a vacuum suction device and a blower device, so that when a separator is positioned on the upper surface of the base plate 120, air can be sucked from the through holes to fix the position.

Referring to FIG. 4 , the separator supply unit 500 may be positioned above the first folding plate, the second folding plate, and the base plate to supply the separator.

The folding driving unit 130 includes a power device including a servo motor to rotate the first folding plate 110a and the second folding plate 110b.

More specifically, the first folding plate 110a and the second folding plate 110b are located on both sides of the base plate 120, and the base plate of the first folding plate 110a and the second folding plate 110b ( 120) direction is coupled to the folding driving unit 130 in a hinge form, so that the first folding plate 110a and the second folding plate 110b can be folded in the direction of the base plate 120 .

The folding driving unit 130 is provided with a stopper, so that the first folding plate 110a and the second folding plate 110b move symmetrically left and right, so that the first folding plate 110a and the second folding plate 110b are placed on the upper surface. The positioned anode thin plate and cathode thin plate can be stacked on the upper surface of the base plate 120 .

The plate height control unit 140 controls the elevating movement of the base plate 120 to move the base plate 120 downward in response to the heights of the thin anode plate, the thin cathode plate and the separator stacked on the upper surface of the base plate 120 . .

More specifically, the thin positive electrode and the thin negative electrode positioned on the upper surfaces of the first folding plate 110a and the second folding plate 110b are caused by the folding of the first folding plate 110a and the second folding plate 110b. It is laminated on the upper surface of the base plate 120, and when the stacking height increases as the process progresses, the first folding plate 110a by the height of the positive electrode thin plate, the negative electrode thin plate and the separator laminated on the upper surface of the base plate 120. And since it is difficult to position the second folding plate 110b at an accurate point when folded, the base plate 120 is moved downward to a position corresponding to the height of the stacked positive electrode thin plate, negative electrode thin plate, and separator, so that the first folding plate When the (110a) and the second folding plate (110b) is folded, it is possible to always be positioned at a certain point.

Referring to FIG. 5 , the clamp unit 200 includes a clamp unit 210 and a clamp driving unit 220 .

The clamp unit 210 is coupled to the base plate 120, and when the thin positive electrode, the thin negative plate and the separator are stacked on the upper surface of the base plate 120, the thin positive electrode, the thin negative plate and the separator can be fixed.

The clamp driving unit 220 is provided with a power device including a servo motor, so that the clamp unit 210 can move forward, backward, and upward and downward.

More specifically, the clamp unit 210 may move forward, backward and upward and downward by the clamp driving unit 220 in order to fix the thin anode plate, the thin cathode plate, and the separator.

The separators are stacked in a zigzag manner by the clamp unit 210, and the thin negative electrode and the thin positive electrode can be alternately stacked between the separators by folding the first folding plate 110a and the second folding plate 110b. have.

The lifting unit 300 moves the entire unit including the folding unit 100 and the clamp unit 200 upward or downward when the stacking process in which the separator, the negative electrode thin plate and the positive electrode thin plate are alternately stacked on the upper surface of the base plate is completed. This allows the stacked product to be moved to the next process.

Hereinafter, an operation method of a secondary battery stacking device having a folding plate according to a preferred embodiment of the present invention will be described in detail.

Referring to FIG. 7 for a method of operating a secondary battery stacking device having a folding plate according to the present invention, the separator adsorption step (S100), the negative electrode plate input step (S200), the first separator fixing step (S300), the first A folding step (S400), a positive electrode plate input step (S500), a second separator fixing step (S600), and a second folding step (S700) are included.

In the separator adsorption step ( S100 ), the separator supplied from the separator supply unit 500 is supplied to the upper portion of the base plate 120 , and is adsorbed and fixed by a plurality of through holes formed in the base plate 120 .

In the negative electrode plate input step (S200), the negative electrode supply unit moves to the upper portion of the first folding plate 110a to supply the negative electrode plate to the upper side of the first folding plate 110a, and the supplied negative electrode plate is formed on the first folding plate 110a. It is adsorbed and fixed by a plurality of through-holes.

The clamp unit 210 is composed of four clamps, the two clamps on the side of the first folding plate 110a on which the negative plate is mounted are the negative clamps, and the two clamps on the side of the second folding plate 110b on which the positive plate is mounted. is called an anode clamp.

In the first separator fixing step ( S300 ), the cathode clamp of the clamp unit 210 moves forward and then moves downward to press and fix the separator adsorbed and fixed on the upper side of the base plate 120 .

In the first folding step (S400), the first folding plate 110a to which the negative electrode plate is adsorbed and fixed on the upper side is folded in the direction of the base plate 120 by the folding driving unit 130, and the first folding plate 110a is upper side By folding of the first folding plate 110a, the negative electrode plate positioned at

When the negative electrode plate is stacked on the upper side of the separator, the positive electrode clamp moves forward and then moves downward to press and fix the negative electrode plate, and the separator supply unit moves in the opposite direction of the first folding plate.

When the negative electrode plate is fixed by the positive electrode clamp, the negative electrode plate is separated from the first folding plate 110a while air is discharged from the through hole of the first folding plate 110a, and when the negative electrode plate is separated from the first folding plate 110a, the first folding plate 110a The plate 110a is rotated by the folding driving unit 130 to return to the initial position.

In the positive electrode plate input step (S500), the positive electrode plate supply unit moves to the upper portion of the second folding plate 110b to supply the positive electrode plate to the upper side of the second folding plate 110b, and the supplied positive electrode plate is formed on the second folding plate 110b. It is adsorbed and fixed by a plurality of through-holes.

In the second separator fixing step ( S600 ), the separator supply unit moves in the direction of the second folding plate so that the separator is stacked on the negative electrode plate positioned above the base plate 120 .

After the separator is laminated on the negative electrode plate, the positive clamp of the clamp unit 210 sequentially performs a backward movement, an upward movement, a forward movement, and a downward movement to press and fix the separator stacked on the negative electrode plate.

In the second folding step (S700), the second folding plate 110b to which the positive electrode plate is adsorbed and fixed on the upper side is folded in the direction of the base plate 120 by the folding driving unit 130, and the second folding plate 110b is upper side By folding of the second folding plate 110b, the positive electrode plate positioned at

When the positive electrode plate is stacked on the upper side of the separator, the negative electrode clamp sequentially performs a backward movement, an upward movement, a forward movement, and a downward movement to press and fix the positive electrode plate, and the separator supply unit moves in the opposite direction of the second folding plate 110b do.

When the positive electrode plate is fixed by the negative electrode clamp, the positive electrode plate is separated from the second folding plate 110b while air is discharged from the through hole of the second folding plate 110b, and when the positive electrode plate is separated from the second folding plate 110b, the second folding plate 110b The plate 110b is rotated by the folding driving unit 130 to return to the initial position.

After the second folding step (S700), the negative electrode plate input step (S200) in which the negative electrode plate is put into the first folding plate again, the first separator fixing step (S300) in which the separators are stacked and fixed on the positive electrode plate upper side of the base plate (S300), the base plate direction A first folding step (S400) in which the first folding plate is folded and the negative electrode plate located on the upper side of the first folding plate is stacked on the upper side of the separator (S400), the positive electrode plate input step (S500) in which the positive electrode plate is put into the second folding plate (S500), the base plate A second separator fixing step (S600) in which the separator is stacked and fixed on the upper side of the negative electrode plate of the (S700) is repeatedly performed.

By repeating the negative electrode plate input step (S200), the first separator fixing step (S300), the first folding step (S400), the positive electrode plate input step (S500), the second separator fixing step (S600), and the second folding step (S700) By doing so, a separator, a negative electrode plate, a separator, a positive electrode plate, a separator, a negative electrode plate, a separator, and a positive electrode plate are sequentially stacked on the upper side of the base plate.

When the stacking process of stacking the positive electrode plate, the separator and the negative electrode plate is completed, the lifting unit 300 moves upward and downward to move the stacked product to the next process.

In the negative electrode plate input step and the positive electrode plate input step, the negative electrode supply unit and the positive electrode supply unit laminate the negative electrode plate and the positive electrode plate on the first folding plate and the second folding plate in order to stack the negative electrode plate and the positive electrode plate in the correct position on the upper side of the first folding plate and the second folding plate. Before moving to the positioning unit that can adjust the exact positions of the negative and positive plates, the negative and positive plates are stacked on top of the first and second folding plates after adjusting the exact positions of the negative and positive plates.

As the separators, negative electrode plates, separators, and positive electrode plates are continuously stacked on the base plate, the base plate moves downward in response to the heights of the thin positive electrode plate, the negative electrode plate and the separator stacked in the plate height control unit.

As the stacking process progresses, as the height of the thin cathode plate, the thin cathode plate, and the separator stacked on the upper side of the base plate increases, it is difficult to position the first and second folding plates at the correct point when the first and second folding plates are folded due to the stacked height. Therefore, the base plate is moved downward to a position corresponding to the height of the stacked positive electrode thin plate, negative negative plate plate and separator, so that the first folding plate and the second folding plate can always be positioned at a certain point when folded.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions are possible within the range that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100 - folding unit 110a - first folding plate
110b - second folding plate 120 - base plate
130 - Folding drive unit 140 - Plate height control unit
200 - clamp unit 210 - clamp unit
220 - Clamp driving unit 300 - Elevating unit

Claims (3)

a folding unit having a separator, a plate fixed so that the thin positive plate and the thin negative plate can be stacked, and a plurality of folding plates that can be hinged; and
A clamp unit capable of fixing the thin positive electrode, the negative electrode and the separator when the thin positive electrode, the negative electrode and the separator are stacked on the upper side of the plate that is combined with the folding unit and fixed
including,
the folding unit
a first folding plate capable of mounting the anode thin plate or the anode thin plate on the upper side;
a second folding plate capable of mounting the anode thin plate or the anode thin plate on the upper side;
a base plate on which a thin anode plate, a thin cathode plate and a separator can be stacked on the upper side;
a separator supply unit positioned above the first folding plate, the second folding plate, and the base plate and capable of supplying a separator;
A folding driving unit having a power device including a servo motor to rotate the first folding plate and the second folding plate, and
Plate height control unit that allows the base plate to move downward in response to the height at which the anode thin plate, cathode thin plate and separator are stacked on the base plate
containing
Including, a secondary battery stacking device having a folding plate. According to claim 1,
clamp unit.
a clamp unit coupled to the base plate and capable of fixing the thin anode plate, the thin cathode plate and the separator when the thin anode plate, the thin cathode plate and the separator are stacked on the upper surface of the base plate;
A clamp driving unit having a power device including a servo motor, and allowing the clamp unit to move forward, backward, and upward and downward;
containing
Further comprising, a secondary battery stacking device having a folding plate. 3. The method of claim 2,
The first folding plate, the second folding plate and the base plate are
A plurality of through holes are formed on the upper surface where the anode thin plate, the cathode thin plate and the separator can be located, and the plurality of through holes are connected to the vacuum suction device and the blower device.
A secondary battery stacking device having a folding plate comprising a.

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