KR102438740B1 - Secondary battery electrode film roll-to-sheet device with vibration compensation unit - Google Patents

Abstract

The present invention relates to a secondary battery electrode film roll-to-sheet device having a vibration correction unit. More specifically, the present invention relates to a secondary battery electrode film roll-to-sheet device having a vibration correction unit, which has a suction roller and a suction plate to perform a notching process of the electrode film in an accurate position. To this end, the secondary battery electrode film roll-to-sheet device of the present invention comprises: an unwinding module capable of unwinding the electrode film wound at a set speed to perform the process; a notching module capable of notching the unwound electrode film at a certain pitch; a cutting module capable of cutting the notched electrode film into a cell shape; and a lamination module capable of checking the defects of the electrode film cut in the form of cells and stacking the electrode cells, wherein the notching module includes a suction roller that can generate a stop section of the electrode and a suction plate that can prevent vibration of the electrode.

Description

Secondary battery electrode film roll-to-sheet device with vibration compensation unit

The present invention relates to a secondary battery electrode film roll-to-sheet device having a vibration compensation unit. More particularly, it relates to a secondary battery electrode film roll-to-sheet device having a vibration compensation unit that is provided with a suction roller and a suction plate to perform a notching process for the electrode film at an accurate position.

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. 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 is being actively conducted along with the development of large-sized lithium secondary batteries for electric vehicles.

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.

An electrode film for forming an electrode assembly is manufactured in a form in which an active material is applied to a portion and an electrode body is exposed without applying an active material to the remaining portion. The exposed portion of the electrode body is processed to serve as an electrode terminal for connecting the positive electrode and the negative electrode to the outside when the electrode assembly is constructed. To enable such processing, the electrode film is formed by coating an active material on a thin conductor constituting the electrode body, and is processed and indistinguishable.

The roll-to-sheet device for the secondary battery electrode film is a device that cuts the exposed part of the electrode film and a part of the coating part coated with the active material to form a terminal part, and cuts it in the form of an electrode cell. To this end, the notched part forms a terminal part by cutting a part of the exposed part using punching or a laser.

Conventionally, a roll-to-sheet apparatus using punching and press was mainly used, but when notching using punching and press, noise and vibration were severely generated, and the accuracy of the notching process performed in the roll-to-sheet apparatus was deteriorated.

Therefore, there is a need for a new roll-to-sheet device for a secondary battery electrode film that can solve these problems.

Prior art literature: KR Registered Patent Publication No. 10-1479724 (2015.01.08. Announcement)

The present invention has been devised to solve the above problems, and it is provided with a suction roller and a suction plate to minimize vibration generation and thus a secondary battery electrode film having a vibration compensation unit that can efficiently perform a notching process. An object of the present invention is to provide a roll-to-sheet device.

A secondary battery electrode film roll-to-sheet device having a vibration correction unit according to the present invention devised to achieve the above object includes: an unwinding module capable of unwinding an electrode film wound at a predetermined speed to perform a process; a notching module capable of notching the unwound electrode film at a predetermined pitch; a cutting module capable of cutting the notched electrode film in a cell shape; It includes a lamination module that can check whether the electrode film cut into a cell shape is defective and can stack electrode cells, and the notching module includes a suction roller that can generate a stop section of the electrode, and a vibration-preventing electrode Including a suction plate.

In addition, the suction roller is combined with the air suction device to suck air, the position is fixed and the inner roller does not rotate, and the electrode film can be transferred by rotating the outer roller with a plurality of through holes. Including, including those capable of sucking air at a certain angle of the inner roller by an air suction device coupled with the inner roller, and capable of adsorbing the electrode film transferred from the through hole of the outer roller by the air suction of the inner roller do.

In addition, the suction roller includes a first suction roller, a second suction roller, a first suction roller elevating device, and a second suction roller elevating device, and the first suction roller is coupled with the first suction roller elevating device to perform upward and downward elevating motions. can be, and the second suction roller is coupled to the second suction roller elevating device and includes one capable of upward and downward lifting and lowering movements.

According to the present invention, since the notching module includes a suction roller and a suction plate, there is an effect of improving the accuracy of the notching process during the notching process using the notching press.

1 is a view showing a secondary battery electrode film roll-to-sheet device having a vibration correction unit according to a preferred embodiment of the present invention;
2 is a view showing the components of the notching module;
3 is a view showing that the suction roller is coupled to the suction roller lifting device.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in adding reference numerals to the components of each drawing, 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 or may be variously implemented by those skilled in the art without being limited thereto.

1 is a view showing a secondary battery electrode film roll-to-sheet device having a vibration compensation unit according to a preferred embodiment of the present invention, FIG. 2 is a view showing the components of a notching module, FIG. 3 is a suction roller and a suction roller It is a view showing that it is coupled to the lifting device.

Referring to FIG. 1, a secondary battery electrode film roll-to-sheet device having a vibration compensation device according to a preferred embodiment of the present invention is a winding module 100, a notching module 200, a cutting module 300, a stacking module ( 400), and the control module 500 is included.

Hereinafter, the components of the secondary battery electrode film roll-to-sheet device having a vibration compensation device according to a preferred embodiment of the present invention will be described in detail.

The unwinding module 100 can unwind the wound electrode film according to a predetermined speed to perform the process, and includes an unwinder, an idle roller, a manual stage, a weight dancer, a tension check unit, an LPC, and an LPC sensor. do.

The unwinder is a device that unwinds the wound electrode film and rotates at a predetermined speed to supply the wound electrode film to the idle roller, and the idle roller can determine the direction of the electrode film unwound by the unwinder.

The unwinder has a position alignment module to align the position of the electrode film, and the electrode film unwound by the unwinder enters the manual stage and breaks when the unwinding electrode film breaks. can be concatenated.

4, the manual stage has cylinders on both sides of the left and right sides, respectively, and when the rupture of the electrode film is checked in the tension check part, the cylinders located on both sides descend and hold the ruptured film to connect the electrode film allow it to be pasted.

The cylinder of the manual stage can move upward and downward, and the upward and downward movement can be controlled by the cylinder switch. If the electrode film breaks, the cylinder moves upward to stop the transfer of the electrode film and The broken electrode film on the table can be pasted together.

The weight dancer adjusts the tension of the electrode film by applying a force in a specific direction by the elastic force of the spring, pneumatic or other devices according to the tension checked by the tension check unit 150 so as to maintain the tension of the unwound electrode film. can

The tension check unit includes a tension roller and a load cell, and by checking the tension of the electrode film applied to the tension roller, the tension state of the electrode film can be monitored during feeding of the electrode film, including whether the electrode film is broken. .

The LPC sensor detects the line of the electrode film, checks the meandering range of the electrode film, and sends a signal to the LPC, and the LPC can correct the meandering of the electrode film.

The notching module 200 may perform a notching process on the unwound electrode film at a predetermined pitch, and referring to FIGS. 9 to 12 , a suction roller, a suction plate 220 , and a notching press 230 are included.

When the electrode film is fed at a constant speed by the Master Feeding Roller, the suction roller reciprocates so that the notching process can be performed in the notching press to make a stop section of the electrode film. .

Referring to FIG. 2 , the suction roller includes a first suction roller 211a, a second suction roller 211b, a first suction roller lifting device 212a, and a second suction roller lifting device 212b.

Referring to FIG. 3 , the first suction roller 211a is coupled to the first suction roller elevating device 212a to perform upward and downward elevating movements, and the second suction roller 211b is the second suction roller elevating device 212a. (212b) can be combined with the upward and downward elevating movement.

The first suction roller 211a can correct the vibration of the electrode film before the electrode film enters the notching press, and is coupled with the first suction roller lifting device 212a to perform upward and downward lifting and lowering movements to stop the electrode film. Make a section so that the electrode film can be notched by the notching press.

The second suction roller 211b can correct the vibration of the electrode film on which the notching process has been completed by the notching press, and is coupled with the second suction roller lifting device 212a to perform upward and downward lifting and lowering motions in the stop section of the electrode film. to make the electrode film to be notched by the notching press.

The first suction roller 211a and the second suction roller 211b are configured to include an outer circumferential roller and an inner circumferential roller, and the outer circumferential roller may rotate to transfer the electrode film, and a plurality of through holes are formed, The inner roller is located inside the outer roller and is combined with the air suction device to suck air, and the position is fixed and does not rotate.

Air is sucked from the surface corresponding to a certain angle of the inner circumferential roller by the air suction device coupled with the inner circumferential roller, and the electrode film transferred from the through hole of the outer circumferential roller can be adsorbed by the air suction of the inner circumferential roller.

A certain angle at which air is sucked from the inner roller is the angle at which the electrode film is in contact with the outer roller, and the electrode film is adsorbed only on the surface where the electrode film and the roller contact, and the electrode film is not adsorbed on the surface where the electrode film and the roller do not contact.

That is, the outer roller rotates and transports the electrode film, and the inner roller does not rotate but is fixed inside the outer roller and sucks air only at a certain angle where the electrode film and the outer roller come in contact with the electrode film to absorb the tension amount. It is possible to prevent slipping and maintain the tension of the electrode film while maximizing the

The electrode film is transported by the rotation of the outer roller, and air is sucked at a position corresponding to a certain angle from the non-rotating inner roller through the through hole formed in the outer roller. Because it can be transferred, it is possible to prevent slip and vibration that may occur when the electrode film is transferred by rollers.

In addition, the first suction roller 211a is coupled to the first suction roller elevating device 212a to perform upward and downward elevating movements, and the second suction roller 211b includes the second suction roller elevating device 212b and It can be combined to perform upward and downward lifting and lowering movements. When the first suction roller 211a moves upward, the second suction roller 211b moves downward, and when the first suction roller 211a moves downward, the second suction roller 211b moves upward. Thus, a stop section of the transferred electrode film is made so that the electrode film is subjected to a notching process by the notching press 230 .

The suction plate includes a first suction plate 220a and a second suction plate 220b.

The first suction plate 220a is located in front of the notching press 230 to prevent vibration of the electrode film before the electrode film enters the notching press, and the second suction plate 220b is located in the rear of the notching press. Located in the notch, it is possible to prevent vibration of the electrode film when the electrode film comes out after the notching process in the notching press.

A plurality of through holes are formed in the first suction plate 220a and the second suction plate 220b, and the vibration of the electrode film can be prevented by sucking air from the plurality of through holes.

In more detail, the first suction plate 220a and the second suction plate 220b may be configured in a plate shape, and a plurality of through holes may be formed in the front surface of the plate-shaped anti-vibration device, and the vacuum suction device and It is possible to prevent vibration of the electrode film transferred from the front surface of the anti-vibration device by sucking air from a plurality of through-holes provided in the front surface of the plate shape.

According to the present invention, the first and second suction rollers rotate and are combined with an outer peripheral roller capable of transferring the electrode film and an air suction device to suck air, and an inner peripheral roller having a fixed position is provided. Due to this, the outer peripheral roller rotates to transport the electrode film, and at the same time, air is sucked from the inner peripheral roller, so that the electrode film can be transported while the electrode film is adsorbed on the outer peripheral roller. By preventing the occurrence of slip, it is possible to maintain the tension of the transferred electrode film.

Therefore, since the electrode film is adsorbed and transported by the first and second suction rollers, the slip phenomenon does not occur and the tension of the electrode film is maintained and the notching process is performed in a taut state at all times. The vibration of the electrode film can be prevented by the suction plate positioned between the first and second suction rollers.

In addition, the first suction plate and the second suction plate may be configured in a plate shape, and a plurality of through holes may be formed in the front surface of the plate-shaped suction plate, and the plurality of through holes formed in the front surface are alternately respectively. It may be connected to the vacuum suction device and the blower device, and each through hole alternately connected to the vacuum suction device and the blower device simultaneously sucks and discharges air to prevent vibration of the electrode film transferred from the front of the suction plate. can do.

In addition, the first suction plate and the second suction plate may be configured in the shape of a plurality of plates including the first plate and the second plate, and each plate has a plate arm, so that it can slide in both directions. Thus, the length of the anti-vibration device can be controlled according to the width of the electrode film, and a plurality of through holes connected to the vacuum suction device and the blower device are also formed in each plate arm, so that air can be simultaneously sucked in and It is possible to prevent the vibration of the electrode film transferred from the front side of the anti-vibration device by discharging.

The shape of the plate arms formed on the first plate and the second plate is formed in the shape of 'b' and 'a' so that it can slide left and right, and three or more plate arms are formed to slide, The shape of the plate arm formed on the first plate and the second plate may be variously substituted with a shape that can slide while they are engaged with each other.

The notching press includes a bottom press die, an upper press die, and a press guide shaft.

The bottom press die of the notching press is fixed, and when the electrode film enters the notching press, the upper press die moves downward to press-notch the electrode film with a designated electrode pattern.

The cutting module 300 can cut the notched electrode film in the form of a cell, and includes a master feeding roller, a feeding conveyor, and a linear reel cutter.

The master feeding roller is the main feeding roller that is connected to the power source including the motor and feeds the electrode film.

The master feeding roller is composed of an upper master feeding roller and a lower master feeding roller. The upper master feeding roller and the lower master feeding roller rotate in opposite directions, and the electrode film is applied to the rotation of the upper master feeding roller and the lower master feeding roller. Thus, it can be fed while in contact with the lower surface of the upper master feeding roller and the upper surface of the lower master feeding roller.

The feeding conveyor can transfer the electrode film that has passed through the master feeding roller to a linear reel cutter to cut it into a cell shape, and the electrode film transferred through the feeding conveyor can be cut into a cell shape by the linear reel cutter.

The linear reel cutter is composed of a linear motion part, a gripping part and a cutting part, and in a state in which the electrode film transferred by the feeding conveyor is gripped using the gripping part, the cutting part is horizontally reciprocated at a constant speed along the guide rail by the linear motion part. The cut part descends while moving to cut the electrode film.

The stacking module 400 can check whether the electrode film cut in the form of a cell is defective, and can stack electrode cells, and can include a transfer conveyor, a vision camera, an unloading conveyor, a discharge, and a magazine transfer. transfer) is included.

The transfer conveyor includes a lower conveyor and an upper conveyor, adsorbs the electrode film cut in the form of a cell in a vacuum and moves it in a constant velocity motion.

The lower conveyor is equipped with a vacuum adsorption unit to prevent the electrode cell from slipping, and the electrode cell transferred to the lower conveyor is adsorbed and transferred due to the vacuum adsorption unit, and the electrode cell adsorbed to the vacuum adsorption unit is registered by the vision camera. It is transferred to the unloading conveyor past the shooting location.

The upper conveyor is located on the upper side of the lower conveyor to prevent slipping of the electrode cell because even if the lower conveyor absorbs the electrode cell by using the vacuum adsorption unit, the electrode cell moves between the upper conveyor and the lower conveyor. Thus, it is possible to prevent the electrode cell from slipping.

The vision camera can determine whether the product is good or defective by photographing the electrode cells transferred by the lower conveyor and the upper conveyor.

The electrode cell is transferred to the unloading conveyor by the lower conveyor, and the electrode cell transferred to the unloading conveyor is transferred to the position of the good product stacker and the defective product stacker according to the result determined by the vision camera.

Discharge drops the transferred cells to the good stacker and the defective stacker and places them on the stacker, and the magazine transfer can stack good or defective cells.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope 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 - Unwinding module 200 - Notching module
211a - first suction roller 211b - second suction roller
212a - First suction roller lifting device 212b - Suction roller lifting and lowering device
220a - first suction plate 220b - second suction plate
230 - Notching press 300 - Cutting module
400 - stacked module

Claims (3)

an unwinding module capable of unwinding the wound electrode film at a predetermined speed to perform the process;
a notching module capable of notching the unwound electrode film at a predetermined pitch;
a cutting module capable of cutting the notched electrode film in a cell shape;
A stacking module that can check whether the electrode film cut in the form of a cell is defective and can stack the electrode cells
including,
Notching module
A suction roller capable of generating a stop section of the electrode, and
Suction plate to prevent vibration of electrode
containing
including,
the suction roller
Inner peripheral roller that is combined with an air suction device to suck air and does not rotate due to a fixed position
An outer peripheral roller that can transport the electrode film by rotating motion and has a number of through holes.
includes,
The air suction device combined with the inner roller sucks air at a certain angle of the inner roller, and can adsorb the electrode film transferred from the through hole of the outer roller by the air suction of the inner roller.
containing
A secondary battery electrode film roll-to-sheet device having a vibration compensation device, including delete According to claim 1,
the suction roller
It includes a first suction roller, a second suction roller, a first suction roller lifting device and a second suction roller lifting device,
The first suction roller is combined with the first suction roller lifting device to perform upward and downward lifting and lowering movements,
The second suction roller is combined with the second suction roller elevating device to enable upward and downward lifting and lowering movements.
Secondary battery electrode film roll-to-sheet device having a vibration compensation device further comprising

Images