KR102330719B1 - Electrode sheet processing apparatus for secondary battery using laser and vision - Google Patents

Abstract

The present invention relates to a device for processing an electrode sheet for a secondary battery using laser and vision. The device for processing an electrode sheet for a secondary battery according to the present invention comprises: a transporting unit for transporting an electrode sheet continuously while unwinding the wound electrode sheet; a vision unit including at least one camera for photographing the meandering state of the transported electrode sheet in real time by photographing either or both of edge parts in the widthwise direction of the electrode sheet to provide meandering information; a measurement unit for measuring the transporting distance of the electrode sheet and providing transporting distance information in real time; a control unit for grasping the position of a preset processing area of the electrode sheet through the transporting distance information provided in real time by the measurement unit, grasping the meandering state of the electrode sheet through the meandering information provided in real time by the vision unit, and providing processing information including the laser radiation time, the laser radiation position and the laser radiation angle on the processing area, which have been generated or corrected in response to the meandering state of the electrode sheet; and a cutting unit including at least one laser cutting device for receiving the processing information provided from the control unit and performing laser cutting on the processing area of the electrode sheet based on the processing information.

Description

Electrode sheet processing apparatus for secondary battery using laser and vision using laser and vision

The present invention relates to an electrode sheet processing apparatus for a secondary battery using a laser and vision, and more particularly, when processing an electrode sheet continuously supplied through a transfer unit, without stopping the transfer of the electrode sheet, and the transfer speed of the electrode sheet It relates to an electrode sheet processing apparatus for a secondary battery using a laser and vision that can process a processing area accurately and at high speed using a laser and a vision camera while maintaining the

In general, a chemical battery includes a positive electrode, a negative electrode, and an electrolyte, and refers to a battery that generates electrical energy using a chemical reaction. can be distinguished.

The use of secondary batteries is gradually increasing due to the advantages of charging and discharging, and these secondary batteries apply an active material to the surface of a current collector to form a positive electrode and a negative electrode, and a separator is interposed therebetween to form an electrode assembly. , is mounted inside a cylindrical or prismatic metal can or pouch-type case of an aluminum laminate sheet, and is mainly manufactured by injecting or impregnating a liquid electrolyte into the electrode assembly or using a solid electrolyte.

The electrode used in such a secondary battery is manufactured through a processing process of notching and cutting the electrode sheet supplied in a wound state.

In the conventional case, as in Korean Patent Application Laid-Open No. 10-2018-0104389 (September 21, 2018), processing into a unit electrode has been made by pressing a mold or a cutter having a shape that matches the shape of the unit electrode on the electrode sheet. .

However, in this prior art, there is a problem that the replacement cycle of the mold or cutter is short, so it must be replaced frequently, and when a meander (angle shift or positional deviation of the transport path) occurs during the transport of the electrode sheet, accurate processing is difficult. In addition, in this conventional press method, when the processing part arrives at the position of the mold or the cutter, the transfer of the electrode sheet must be stopped for processing, so it is difficult to transfer the electrode sheet at high speed and the processing time is long. .

Republic of Korea Patent Publication No. 10-2018-0104389 (2018.09.21.)

Accordingly, an object of the present invention is to provide an electrode sheet processing apparatus for a secondary battery using a laser and a vision that can overcome the above conventional problems.

Another object of the present invention is to provide an electrode sheet processing apparatus for a secondary battery using a laser and vision capable of precisely and high-speed processing of the processing portion of the electrode sheet while maintaining the transport speed of the electrode sheet.

Another object of the present invention is to provide an electrode sheet processing apparatus for a secondary battery using a laser and vision capable of accurate processing of a processing part through a transport distance measurement and a meander measurement.

According to the embodiment of the present invention for achieving some of the above technical problems, an electrode sheet processing apparatus for a secondary battery according to the present invention, a transfer unit for continuously transferring the electrode sheet while unwinding the wound electrode sheet; a vision unit having at least one camera for providing meandering information by photographing in real time a meandering state of the transferred electrode sheet by photographing at least one edge portion among both edges of the electrode sheet; a measuring unit for measuring the transport distance of the electrode sheet and providing transport distance information in real time; The position of the preset processing area of the electrode sheet is identified through the transport distance information provided in real time through the measurement unit, and the meandering state of the electrode sheet is identified through the meandering information provided in real time through the vision unit. a control unit for providing processing information including a laser irradiation time, a laser irradiation position, and a laser irradiation angle for the processing area generated or corrected in response to the meandering state of the electrode sheet; and a cutting unit having at least one laser cutting machine that receives the processing information provided from the control unit and performs a lower cutting on the processing area of the electrode sheet based on the processing information.

The measurement unit provides speed information measured by the transfer speed of the electrode sheet to the control unit in real time, and the control unit provides the processing information reflecting the speed information to the cutting unit, through the cutting unit. The cutting of the processing region may be performed in a state in which the electrode sheet is transported at a constant speed in response to the processing information.

The vision unit may include: a first camera for photographing an edge of one side of the electrode sheet in a width direction to provide first meandering information to the control unit; and a second camera for providing second meandering information to the control unit by photographing the other edge of the electrode sheet in the width direction, wherein the cutting unit controls the first processing information corresponding to the first meandering information. a first laser cutting machine that is provided from the unit and performs notching processing on a first processing area set on one side in the width direction of the electrode sheet; A second laser cutting machine may be provided for receiving the second processing information corresponding to the second meandering information from the control unit and performing notching processing on the second processing area set on the other side in the width direction of the electrode sheet.

The vision unit captures at least one edge portion of both edges in the width direction of the electrode sheet to which the notching processing is performed and transferred, and photographing the meandering state of the electrode sheet transferred after the notching processing in real time. Further comprising at least one third camera for providing meandering information to the control unit, wherein the cutting unit receives third processing information corresponding to the third meandering information from the control unit, and the notching is performed It may further include a third laser cutter for cutting the electrode sheet in the width direction to divide it into unit sheets having a predetermined unit length.

The measuring unit is, for processing the electrode sheet through the first laser cutter and the second laser cutter, the transfer speed of the electrode sheet using the rotational speed of a roller that rotates together when the electrode sheet is transferred and a first encoder for measuring the transport distance and providing the speed information and the transport distance information. For the processing of the electrode sheet through the third laser cutter, a second encoder may be provided for measuring a transport speed and a transport distance of the electrode sheet to provide the speed information and the transport distance information.

The vision unit is configured to photograph at least one edge portion among both edge portions in the width direction of the transferred electrode sheet, and provide fourth meandering information obtained by photographing the meandering state of the transferred electrode sheet in real time to the control unit. A fourth camera is further provided, wherein the cutting unit receives the fourth processing information corresponding to the fourth meandering information from the control unit, cuts the electrode sheet in the longitudinal direction to have a predetermined unit width. At least one fourth laser cutter for dividing the unit sheet may be further provided.

A first cutting line to an n-th cutting line (n is a natural number greater than 1) are virtually set in the electrode sheet in parallel in the longitudinal direction so as to have the unit width in the width direction, and the fourth laser cutter is one laser cutter. provided with a cutter, wherein the fourth laser cutter cuts each cutting line in the longitudinal direction by a first cutting length while moving sequentially in the width direction starting from the first cutting line to the n-th cutting line, and again Return to the first cutting line so that the cutting parts are connected to each other so that each cutting line is cut in the longitudinal direction by the first cutting length while sequentially moving in the width direction from the first cutting line to the n-th cutting line. Repeatedly controlled to perform, the electrode sheet may be divided into unit sheets having a predetermined unit width.

A first cutting line to an n-th cutting line (n is a natural number greater than 1) are virtually set in the electrode sheet in parallel in the longitudinal direction so as to have the unit width in the width direction, and the fourth laser cutter is configured to have each cutting line n pieces are provided, one for each, so that the n fourth laser cutters are controlled to cut each cutting line in the longitudinal direction, so that the electrode sheet can be divided into unit sheets having a predetermined unit width.

The measuring unit includes a third encoder that measures a transport speed and a transport distance of the electrode sheet for processing the electrode sheet through the at least one fourth laser cutter and provides the speed information and the transport distance information can do.

The meandering degree may include information on a degree to which the electrode sheet deviates from a preset movement reference line and a degree to which the electrode sheet deviates from a reference angle formed with the movement reference line.

According to the present invention, the meandering state of the transferred electrode sheet is detected in real time, processing information for the processing area is corrected or generated through this, and laser cutting is performed through this processing information, so that accurate processing is possible. , that is, there is an advantage in that it is possible to perform cutting in the processing area while the electrode sheet is being transported at a constant speed without stopping the transport state of the electrode sheet during processing, that is, laser cutting.

1 is a block diagram of an electrode sheet processing apparatus for a secondary battery according to an embodiment of the present invention;
Figure 2 is a first implementation conceptual diagram for the notching process of the electrode sheet processing apparatus for a secondary battery of Figure 1,
3 shows a process of measuring meandering information using the vision unit of FIG. 1 ,
Figure 4 is a view for explaining a processing process through the cutting unit of Figure 1,
5 is a view for explaining a cutting process corresponding to the transport speed of the electrode sheet.
Figure 6 is a second implementation conceptual diagram for the slitting process of the electrode sheet processing apparatus for a secondary battery of Figure 1,
7 shows an example of multi-cutting using a cutting unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, without any intention other than to provide a thorough understanding of the present invention to those skilled in the art to which the present invention pertains.

1 is a block diagram of an electrode sheet processing apparatus for a secondary battery according to an embodiment of the present invention.

As shown in FIG. 1 , the electrode sheet processing apparatus 100 for a secondary battery according to an embodiment of the present invention includes a transfer unit 110 , a vision unit 120 , a measurement unit 130 , and a control unit 140 . , and a cutting unit 150 .

The transfer unit 100 unwinds the electrode sheet from the electrode reel for winding and storing the electrode sheet S for processing the electrode sheet, and continuously transfers the electrode sheet using a plurality of rollers. In addition, the transfer unit 100 may be composed of various transfer units suitable for transferring the electrode sheet.

The vision unit 120 is configured to photograph at least one edge portion among both edges of the electrode sheet in the width direction, and photograph the meandering state of the transferred electrode sheet in real time to provide meandering information. provided to provide meandering information to the control unit 140 . The at least one camera may be a vision camera. Here, the meandering information may include information about a degree to which the electrode sheet deviates from a preset movement reference line and a degree to which the electrode sheet deviates from a reference angle formed with the movement reference line when the electrode sheet is transported.

The measuring unit 130 measures the transport distance of the electrode sheet and provides transport distance information to the control unit 140 in real time. The measuring unit 130 measures the transport speed and transport distance of the electrode sheet using the rotation speed of a roller rotating together when the electrode sheet is transported to provide the speed information and the transport distance information. It may be provided with at least one encoder (encoder) that can. The operation or configuration of the encoder is well known to those skilled in the art, and the measuring unit 130 may be provided with various measuring devices capable of providing transport distance information and speed information of the electrode sheet in addition to the encoder. In the present invention, the encoder will be described as an example.

The control unit 140 detects the position of a preset processing area of the electrode sheet through the transport distance information provided in real time through the measurement unit 143 , and provides it in real time through the vision unit 120 . The meandering state of the electrode sheet is identified through the meandering information, and in response to the meandering state of the electrode sheet, processing information including a laser irradiation time, a laser irradiation position, and a laser irradiation angle for the processing area is generated or corrected. Thus, it is provided to the cutting unit 150 . The control unit 140 includes a plurality of controllers, and it is also possible for each controller to control each laser cutting machine constituting the cutting unit 150, and one controller collectively controls the entire cutting unit 150. It is also possible to control

The cutting unit 150 includes at least one laser cutter that receives the processing information provided from the control unit 140 and performs laser cutting on the processing area of the electrode sheet based on the processing information. As the laser cutting machine, a laser cutting machine well known to those skilled in the art may be used.

As described above, the electrode sheet processing apparatus 100 for a secondary battery of the present invention detects the meandering state of the transferred electrode sheet in real time, corrects the processing information on the processing area through this, and laser cutting through the corrected processing information. There is an advantage in that accurate processing is possible as have.

To this end, the measuring unit 130 provides the speed information measured by the transport speed of the electrode sheet and the transport distance information to the control unit 140 in real time, and the control unit 140 provides the meandering information and The processing information is generated or corrected by reflecting the speed information and the transport distance information, and laser cutting is performed in the cutting unit based on the corrected processing information, so that the electrode sheet is transported at a constant speed. Precise machining is possible.

The control unit 140 may store processing information of a preset default value, and operate to correct processing information by reflecting only a portion changed through the meander information, speed information, and travel distance information, and the meander information It is also possible to operate so that processing information is newly generated in real time by reflecting the , speed information, and transport distance information each time the input is input.

FIG. 2 is a conceptual diagram of a first implementation for the notching process of the electrode sheet processing apparatus for a secondary battery of FIG. 1 .

As shown in FIG. 2 , the electrode sheet processing apparatus 100 for a secondary battery may be implemented as a processing apparatus for a notching process and a cutting process.

To this end, the transfer unit 110 unwinds the electrode sheet S from the electrode reel on which the electrode sheet S is wound, and continuously transfers the electrode sheet using a plurality of rollers 112 . In addition, the transfer unit 100 may be composed of various transfer units suitable for transferring the electrode sheet.

The electrode sheet (S) may be divided into an electrode holding portion (S2) coated with an electrode active material and an electrode uncoated portion (S1) not coated with an electrode active material, and an electrode uncoated portion of one edge of the electrode sheet (S) It is necessary to cut and process the part (S1) to become an electrode lead, and a notching process to process the electrode holding part (S2) part of the other edge.

The electrode sheet S may include a first processing region 210 that is a processing region of one edge portion in the width direction and a second processing region 220 that is a processing region of the other edge portion in the width direction.

To this end, the vision unit 120 may include a first camera 121 and a second camera 122 . In addition, the measuring unit 130 may include a first encoder 131 , and the cutting unit 150 may include a first laser cutter 151 and a second laser cutter 152 . One or a plurality of controllers constituting the control unit 140 may be provided.

The first camera 121 captures the first meandering information by photographing the portion of the first processing region 210 of the edge portion of one side in the width direction of the electrode sheet S (eg, the electrode uncoated portion S1 side). provided to the control unit 140 .

The second camera 122 captures the second meandering information by photographing the second processing area 220 of the other edge portion in the width direction of the electrode sheet S (eg, the electrode holding portion S2 side). provided to the control unit 140 .

3 shows examples of the first meandering information and the second meandering information.

Figure 3 (a) is a case in which the electrode sheet (S) is transferred along the reference lines (R1, R2) on both sides without deviating from the reference lines (R1, R2) on both sides in the width direction. In this case, the meandering state is not performed, and the first meandering information and the second meandering information are transmitted to the control unit 140 as a preset default value or information indicating that the meandering is not occurring.

In the case of (b) of FIG. 3 , the electrode sheet S is transported by shifting the reference lines R1 and R2 to one side by a distance of “L”. In this case, the first meandering information and the second meandering information are information that can know values for distance and direction so that the electrode sheet S is meandering by a distance of “L” to one side, and the control is transmitted to the unit 140 .

In the case of (c) of Figure 3, the electrode sheet (S) is a case in which the reference line (R1, R2) is shifted by a predetermined angle (θ) is transferred. In this case, the first meandering information and the second meandering information are information that can know the values for the angle and the wrong direction so that it can be known that the electrode sheet S is in a meandering state by a certain angle θ, and the control unit It is transmitted to (140).

The meandering information, such as the first meandering information and the second meandering degree, etc. provided from the vision unit 120 is received by the control unit 140 when cutting the machining areas 210 and 220 in the cutting unit 150 . The processing information is corrected or generated so that the meandering information is reflected and cut.

The first encoder 131 rotates in response to the transfer of the electrode sheet S for processing the electrode sheet S through the first laser cutter 151 and the second laser cutter 152 . The transport speed and transport distance of the electrode sheet S are measured using the rotational speed of a roller 114 to provide the speed information and the transport distance information to the control unit 140 . Since the roller 114 comes into contact with the electrode sheet S and rotates in response to the transfer of the electrode sheet S, the transfer speed and transfer of the electrode sheet S through the rotational speed of the roller 114 . The measurement of distance becomes possible. It is possible to obtain cutting information including a cutting time point and a cutting position of the electrode sheet S through the first laser cutter 151 and the second laser cutter 152 .

4 is a schematic diagram illustrating a process of processing through corrected processing information.

As shown in (a) of Figure 4, as in the case of (a) of Figure 3, when the electrode sheet (S) is normally transported without departing from the reference lines (R1, R2) on both sides in the width direction, the Machining is performed on the machining area C1 through the machining information reflecting the speed information and the feed distance information transmitted through the first encoder 131 .

As shown in (b) of FIG. 4, as in the case of (b) of FIG. 3, the electrode sheet S is transported by shifting the reference lines R1 and R2 to one side by a distance of "L". , processing information reflecting the meandering information that the electrode sheet (S) is shifted to one side by a distance of "L" together with the speed information and the transport distance information transmitted through the first encoder 131 (C2) will be processed.

As shown in (c) of Figure 4, as in the case of (c) of Figure 3, when the electrode sheet (S) is shifted by a certain angle (θ) with respect to the reference lines (R1, R2) and transferred, The processing area C3 through processing information reflecting the meandering information that the electrode sheet S is transported by being twisted by a certain angle θ together with the speed information and the transport distance information transmitted through the first encoder 131 processing will be performed on

The first laser cutter 151 constituting the cutting unit 150 uses the first processing information provided from the control unit 140 to which the first meandering information is reflected, on one side in the width direction of the electrode sheet (S). Notching processing is performed on the first processing area 210 set in .

In addition, the second laser cutter 152 constituting the cutting unit 150 uses the second processing information provided from the control unit 140 to which the second meandering information is reflected, the width of the electrode sheet (S). Notching processing is performed on the second processing area 220 set on the other side of the direction.

Here, the first processing information and the second processing information are generated or corrected by reflecting the speed information and the transport distance information provided through the first encoder 131 together.

After notching is performed through the first laser cutter 151 and the second laser cutter 152, the electrode sheet S is cut in the width direction to be divided into unit sheets having a predetermined unit length. The process may be further performed. This division processing is performed by at least one third camera 123 provided in the vision unit 120 , a second encoder 132 provided in the measurement unit 130 , and a third camera provided in the cutting unit 150 . This may be performed through the laser cutting machine 153 and the control unit 140 . Here, the process of cutting the electrode sheet (S) in the width direction and dividing it into unit sheets having a predetermined unit length is sometimes interpreted as being included in the notching process, but in the present invention, it will be interpreted separately.

The at least one third camera 123 captures at least one edge portion among both edges in the width direction of the electrode sheet S to which the notching processing is performed and transferred, and the electrode sheet transferred after the notching processing ( The third meandering information obtained by photographing the meandering state of S) in real time is provided to the control unit 140 .

The second encoder 132 measures the transport speed and transport distance of the electrode sheet S for the processing of the electrode sheet S through the third laser cutter 153 to obtain the speed information and the transport distance. will provide information. When the electrode sheet (S) is transferred on the same transfer unit in which the first encoder 132 is operated, it is not provided and the speed information and transfer distance information of the first encoder 131 may be used, but the electrode sheet It is possible to separately provide a second encoder 132 at the front end of the third laser cutter 153 based on the transfer direction in order to accurately measure the transfer speed and transfer distance of (S). The conveying distance information and the conveying speed information measured through the second encoder 132 are provided to the control unit 140 and used for generating and correcting the third processing information.

The control unit 140 cuts the electrode sheet S in the width direction by reflecting the third meander information, the transport distance information measured through the second encoder 132, and the speed information to a predetermined unit The third processing information, which is processing information for the third processing region 230 , which is a processing region for dividing into unit sheets having a length, is generated or corrected. The control unit 140 includes a controller for the notching processing of the first processing region 210 and the second processing region 220 and a controller for the cutting processing of the third processing region 230 , respectively. It is also possible to control all the machining processes by having one controller.

The third laser cutter 153 receives the third processing information from the control unit 140, cuts the electrode sheet on which the notching processing has been performed in the width direction, and divides it into unit sheets having a predetermined unit length. In order to do this, cutting processing is performed on the third processing area 230 .

5 is a view for explaining a cutting process of the third processing area.

In the present invention, it has already been described that the laser processing is performed in a state in which the electrode sheet (S) is transferred at a constant speed without stopping the transfer. To this end, when it is desired to cut the electrode sheet (S) in the width direction, which is a direction perpendicular to the transport direction of the electrode sheet (S), the laser irradiation direction of the third laser cutter 153 has an inclined direction rather than a vertical direction. should do so

FIG. 5A shows the cutting line C4 of the third processing region 230 when the electrode sheet S is in a stationary state. In this case, the third laser cutting machine 153 cuts the laser so as to form a vertical vertical direction during laser cutting.

However, as shown in (b) of FIG. 5 , if the electrode sheet S is being transported at a constant speed in the direction of the arrow, and wants to cut vertically in the width direction, the transport speed of the electrode sheet S is reflected. Therefore, the cut portion is actually cut vertically as shown in FIG. The inclination angle of the cutting is changed corresponding to the feed speed of the electrode sheet (S) and the cutting speed through the third laser cutter (153). This principle should be equally applied when cutting in the width direction in FIG. 4 .

FIG. 6 is a conceptual diagram of a second implementation for a slitting process of the electrode sheet processing apparatus for a secondary battery of FIG. 1 .

As shown in FIG. 6 , the electrode sheet processing apparatus 100 for a secondary battery can be implemented as an apparatus for slitting processing by cutting the electrode sheet in the longitudinal direction and dividing the electrode sheet into unit sheets having a predetermined unit width. The slitting process may be performed by a device separate from the notching process and the cutting process described with reference to FIGS. 2 to 5 .

To this end, the transfer unit 110 unwinds the electrode sheet S from the electrode reel on which the electrode sheet S is wound, and continuously transfers the electrode sheet using a plurality of rollers 112 . In addition, the transfer unit 100 may be composed of various transfer units suitable for transferring the electrode sheet.

In addition, at least one fourth camera 124 and 125 provided in the vision unit 120, a third encoder 133 provided in the measurement unit 130, and a fourth laser cutter provided in the cutting unit 150 ( 154) and the control unit 140 .

The at least one fourth camera 124 and 125 photographed at least one edge portion among both edges in the width direction of the transferred electrode sheet S, and photographed the meandering state of the electrode sheet S in real time. The meandering information is provided to the control unit 140 . The fourth cameras 124 and 125 may be provided on both edges of the electrode sheet S in the width direction, respectively, or may be provided only on one edge of the electrode sheet S.

The third encoder 133 measures the transport speed and transport distance of the electrode sheet S for the processing of the electrode sheet S through the fourth laser cutter 154 to obtain the speed information and the transport distance. will provide information. The conveying distance information and the conveying speed information measured through the third encoder 133 are provided to the control unit 140 and used for generating and correcting the fourth processing information.

The control unit 140 cuts the electrode sheet S in the longitudinal direction by reflecting the fourth meander information, the transport distance information measured through the third encoder 133, and the speed information to a predetermined unit The fourth processing information, which is processing information for the fourth processing region 240 , which is a processing region for dividing into unit sheets having a width, is generated or corrected. The control unit 140 performs the fourth processing through a controller separate from a controller for cutting the first processing region 210 , the second processing region 220 , and the third processing region 230 . It is possible to create or correct information.

The fourth laser cutter 154 receives the fourth processing information from the control unit 140, cuts the electrode sheet S in the longitudinal direction, and divides the electrode sheet S into unit sheets having a predetermined unit width. Cutting processing is performed on the processing area 240 . The fourth laser cutter 154 may include a plurality of fourth laser cutters, one for each cutting line CL1 and Cln. That is, when there are n cutting lines CL1 and Cln, n are provided, one for each cutting line, so that the n fourth laser cutters 154 are controlled to cut each cutting line in the longitudinal direction, respectively, and the electrode sheet It is possible to configure (S) to be divided into unit sheets having a predetermined unit width.

On the other hand, multi-cutting in which the first cutting line to the n-th cutting line (n is a natural number greater than 1) using a single fourth laser cutting machine 154 performs a cutting process on the virtual fourth processing area is performed. possible.

7 shows an example of multi-cutting using a cutting unit.

6 and 7, in the fourth processing region 240 of the electrode sheet S, first cutting lines to n-th cutting lines ( n is a natural number greater than 1) is virtually set.

In this case, the fourth laser cutter 154 moves sequentially in the width direction starting from the first cutting line CL1 to the n-th cutting line CLn, and cuts each cutting line by a predetermined first cutting length. After cutting in the longitudinal direction, return to the first cutting line CL1 so that the cutting portions are connected to each other through the connection point P1 in the width direction from the first cutting line CL1 to the n-th cutting line CLn It is controlled to repeatedly perform the method of cutting each cutting line in the longitudinal direction by the first cutting length while sequentially moving, so that the electrode sheet S can be divided into unit sheets having a predetermined unit width.

Specifically, at the time of the first cutting line CL1, the first cutting length is cut in the longitudinal direction, and the second cutting length is cut in the longitudinal direction by moving a unit width in the width direction by the first cutting length. After moving in the width direction to the n-th cutting line CLn and cutting by the first cutting length, the first cutting line CL1 returns to the n-th cutting line CLn sequentially, so that the cutting portion is a connection point The method of cutting by the first cutting length is repeatedly performed so that they are connected to each other through (P1). To this end, the cutting speed of the fourth laser cutter 154 should be significantly faster than the feeding speed of the electrode sheet (S).

As described above, according to the present invention, the meandering state of the electrode sheet transferred in real time is detected, processing information on the processing area is corrected or generated through this, and laser cutting is performed through this processing information, so that accurate processing There is an advantage that this is possible, that is, there is an advantage that cutting can be performed on the processing area while the electrode sheet is being transferred at a constant speed without stopping the transfer state of the electrode sheet during processing, that is, laser cutting.

Since the description of the above embodiment is merely given as an example with reference to the drawings for a more thorough understanding of the present invention, it should not be construed as limiting the present invention. In addition, it will be apparent to those of ordinary skill in the art to which the present invention pertains that various changes and modifications can be made without departing from the basic principles of the present invention.

110: transfer unit 120: vision unit
130: measuring unit 140: control unit
150: cutting unit

Claims (10)

In the electrode sheet processing apparatus 100 for a secondary battery:
a transfer unit for continuously transferring the electrode sheet (S) while unwinding the wound electrode sheet (S);
At least one camera for providing meandering information by photographing in real time the meandering state of the transferred electrode sheet (S) by photographing at least one edge portion among both edges in the width direction of the electrode sheet (S) a vision unit 120;
a measuring unit 130 for measuring the transport distance of the electrode sheet (S) and providing transport distance information in real time;
The position of the preset processing area of the electrode sheet S is identified through the transport distance information provided in real time through the measuring unit 130, and the meandering information provided in real time through the vision unit 120 is obtained. Through grasping the meandering state of the electrode sheet (S), processing including the laser irradiation time, laser irradiation position, and laser irradiation angle for the processing area generated or corrected in response to the meandering state of the electrode sheet (S) a control unit 140 that provides information;
A cutting unit 150 having at least one laser cutting machine that receives the processing information provided from the control unit 140 and performs a rate cut on the processing area of the electrode sheet S based on the processing information. including,
The measurement unit 130 provides speed information measured by the transport speed of the electrode sheet S to the control unit 140 in real time,
The control unit 140 provides the processing information reflecting the speed information to the cutting unit 150,
The vision unit 120,
a first camera 121 that provides first meandering information to the control unit 140 by photographing an edge portion of one side of the electrode sheet in the width direction;
a second camera 122 that provides second meandering information to the control unit 140 by photographing the other edge portion in the width direction of the electrode sheet (S);
At least one edge portion of both edges in the width direction of the electrode sheet (S) to which the notching processing is performed and transferred is photographed, and the meandering state of the electrode sheet (S) transferred after the notching processing is photographed in real time. and at least one third camera 123 that provides three meandering information to the control unit 140,
The cutting unit 150,
The first processing information corresponding to the first meandering information is provided from the control unit 140, and the first processing region set on one side in the width direction of the electrode sheet S is subjected to notching processing. 1 and a laser cutter 151;
A second laser cutting machine for receiving the second processing information corresponding to the second meandering information from the control unit 140 and performing notching processing on the second processing area set on the other side in the width direction of the electrode sheet (S) (152) and;
The third processing information corresponding to the third meandering information is received from the control unit 140, the electrode sheet S on which the notching processing is performed is cut in the width direction to form a unit sheet having a predetermined unit length. and a third laser cutting machine 153 to divide,
The cutting of the processing area through the cutting unit 150 is performed in a state in which the electrode sheet S is transported at a constant speed in response to the processing information,
The width direction cutting of the electrode sheet (S) performed in a state in which the electrode sheet (S) is transported at a constant speed is performed by the first laser cutter 151 , the second laser cutter 152 and the third laser An electrode sheet processing apparatus for a secondary battery, characterized in that the laser cutting direction of each cutter (153) is performed so as to have an inclined direction set in consideration of the transport speed of the electrode sheet. delete delete delete The method according to claim 1,
The measurement unit 130,
For the processing of the electrode sheet S through the first laser cutter 151 and the second laser cutter 152, the rotational speed of a roller rotating together when the electrode sheet S is transported is used. a first encoder 131 for measuring the transport speed and transport distance of the electrode sheet (S) to provide the speed information and the transport distance information;
A second encoder ( 132), an electrode sheet processing apparatus for a secondary battery, characterized in that it is provided. In the electrode sheet processing apparatus 100 for a secondary battery:
a transfer unit for continuously transferring the electrode sheet (S) while unwinding the wound electrode sheet (S);
At least one camera for providing meandering information by photographing in real time the meandering state of the transferred electrode sheet (S) by photographing at least one edge portion among both edges in the width direction of the electrode sheet (S) a vision unit 120;
a measuring unit 130 for measuring the transport distance of the electrode sheet (S) and providing transport distance information in real time;
The position of the preset processing area of the electrode sheet S is identified through the transport distance information provided in real time through the measuring unit 130, and the meandering information provided in real time through the vision unit 120 is obtained. Through grasping the meandering state of the electrode sheet (S), processing including the laser irradiation time, laser irradiation position, and laser irradiation angle for the processing area generated or corrected in response to the meandering state of the electrode sheet (S) a control unit 140 that provides information;
A cutting unit 150 having at least one laser cutting machine that receives the processing information provided from the control unit 140 and performs a rate cut on the processing area of the electrode sheet S based on the processing information. including,
The measurement unit 130 provides speed information measured by the transport speed of the electrode sheet S to the control unit 140 in real time,
The control unit 140 provides the processing information reflecting the speed information to the cutting unit 150,
The vision unit 120,
By photographing at least one edge portion of both edges in the width direction of the transferred electrode sheet (S), the fourth meandering information obtained by photographing the meandering state of the transferred electrode sheet (S) in real time is provided to the control unit At least one fourth camera (124, 125) is further provided,
The cutting unit 150,
One fourth of receiving the fourth processing information corresponding to the fourth meandering information from the control unit 140, cutting the electrode sheet S in the longitudinal direction and dividing the electrode sheet S into unit sheets having a predetermined unit width and a laser cutting machine 154,
The cutting of the processing area through the cutting unit 150 is performed in a state in which the electrode sheet S is transported at a constant speed in response to the processing information,
In order to divide the electrode sheet (S) into unit sheets having a predetermined unit width by cutting the electrode sheet (S) in the longitudinal direction in a state in which the electrode sheet (S) is transported at a constant speed,
A first cutting line (CL1) to an nth cutting line (n is a natural number greater than 1) (CLn) are virtually set in the electrode sheet (S) in parallel in the longitudinal direction to have the unit width in the width direction,
The fourth laser cutting machine 154 moves sequentially in the width direction starting from the first cutting line CL1 of the electrode sheet S to the n-th cutting line CLn to cut each cutting line first. The cut length is cut in the longitudinal direction, and then returned to the first cutting line CL1 so that the cutting portions are connected to each other, and sequentially from the first cutting line CL1 to the n-th cutting line CLn in the width direction. Controlled to repeatedly perform a method of cutting each cutting line in the longitudinal direction by the first cutting length while moving, the electrode sheet (S) is divided into unit sheets having a predetermined unit width. sheet processing equipment. delete delete 7. The method of claim 6,
The measuring unit is
For processing the electrode sheet (S) through the at least one fourth laser cutting machine (154), a first method for measuring a transport speed and a transport distance of the electrode sheet (S) to provide the speed information and the transport distance information 3 An electrode sheet processing apparatus for a secondary battery, characterized in that it is provided with an encoder (133). 7. The method according to claim 1 or 6,
The meandering information is an electrode sheet processing apparatus for a secondary battery, characterized in that it includes information about the degree to which the electrode sheet deviates from a preset movement reference line and the degree to which the electrode sheet (S) deviates from the reference angle formed with the movement reference line.

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