KR102558461B1 - Manufacturing method and apparatus for electrode stack - Google Patents

Abstract

In the manufacturing method of the present invention, in the method of manufacturing an electrode assembly in which a positive electrode, a negative electrode, and a separator are wound together to manufacture an electrode assembly, setting the input amount of each of the positive electrode, the negative electrode, and the separator during winding; fixing the ends of the anode, cathode, and separator to the winding core; winding the positive electrode, the negative electrode, and the separator together by rotating the winding core; monitoring the input state of each of the positive electrode and the negative electrode while the positive electrode and the negative electrode are input; Cutting each of the anode, cathode, and separator; and a defect determination step of calculating an end gap, which is a difference in distance between the end positions of the cut anode and the end position of the cut cathode, and determining a defect based on whether the calculated end gap is within a predetermined range.
The manufacturing apparatus of the present invention is an apparatus for manufacturing an electrode assembly, comprising: a winding core for winding the positive electrode, the negative electrode, and the separator by rotating while the ends of the positive electrode, the negative electrode, and the separator are fixed together; A transfer unit for injecting the electrode into the winding core by the rotational force of the built-in transfer motor; A cutter disposed between the core and the transfer unit to cut the electrode introduced into the core; and a controller that calculates an end gap, which is a difference in distance between the end positions of the cut anode and the end positions of the cut cathode, using the number of rotations of the transfer motors of the anode and the cathode, the cutter position of the anode, and the cutter position of the cathode as variables, and determines whether the calculated end gap is within a predetermined range.

Description

Electrode assembly manufacturing method and manufacturing apparatus {Manufacturing method and apparatus for electrode stack}

The present invention relates to a method and apparatus for manufacturing an electrode assembly, and relates to a manufacturing method and apparatus for an electrode assembly capable of sorting out good products from defective products by determining the occurrence of misalignment defects due to the distance between the ends of the electrodes (cathode and anode) wound together with a separator (a difference in distance between the ends of the cut anode and the end of the cut cathode) in the longitudinal direction.

Lithium secondary batteries, which are chargeable and dischargeable, light, and have high energy density and power density, are widely used as energy sources for various devices.

In addition, hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), battery electric vehicles (BEV), and electric vehicles (EV) have been proposed as alternative solutions to solve air pollution and greenhouse gas problems of existing internal combustion engine vehicles using fossil fuels such as gasoline vehicles and diesel vehicles.

Lithium secondary batteries are classified into a lithium ion battery using a liquid electrolyte and a lithium polymer battery using a polymer electrolyte according to the type of electrolyte, and classified into a cylindrical, prismatic or pouch type according to the shape of an exterior material in which an electrode assembly is accommodated.

Typically, an electrode assembly employed in a prismatic secondary battery includes an anode, a separator, and a cathode. The positive electrode is made so that the holding portion (positive electrode coating portion) coated with the positive electrode active material and the uncoated uncoated portion are repeated on the positive electrode current collector, and the negative electrode is similarly made to repeat the holding portion (negative electrode coating portion) coated with the negative electrode active material on the negative electrode current collector and the uncoated plain portion. An electrode tab is processed through a notching device on the non-coated portion of the positive and negative electrodes, and the negative electrode and the positive electrode are laminated while being separated by a separator. The separator causes an electrochemical reaction by insulating between the positive electrode and the negative electrode and allowing active material ions to be exchanged between the electrode plates.

The method of manufacturing an electrode assembly by interposing a separator between the negative electrode and the positive electrode is a method of sequentially stacking a negative electrode, a positive electrode, and a separator after cutting them into a required size, and a negative electrode, a positive electrode, and a separator in a state in which the negative electrode, the positive electrode, and the separator are continuously supplied. A method of winding (winding) a separator at a core is widely known.

In the conventional winding method, each of the positive electrode, the negative electrode, and the separator is configured to be unwound (unwound) from supply rollers and continuously supplied, while the end of each of the positive electrode, the negative electrode, and the separator is fixed at the winding core. When the core rotates, it is wound (wound) by a predetermined number of revolutions to produce a cylindrical electrode assembly.

Therefore, the manufacturing apparatus of the electrode assembly (having a jelly roll form) manufactured by the winding method is, as shown in FIG. 1A, supply rollers 2a, 3a, 4a; When the ends of the cathode 3, the anode 2, and the separator 4 are fixed, the winding core 5 rotates to wind the cathode 3, the anode 2, and the separator 4 to form an electrode assembly; Guide rollers disposed between the supply rollers 2a, 3a, and 4a and the winding core 5 to guide the winding core in a direction while maintaining appropriate tension while the cathode 3, the anode 2, and the separator are supplied; and a cutter (not shown) that cuts the cathode 3, the anode 2, and the separator 4 when they are wound to a predetermined length.

On the other hand, in the case of manufacturing with such a winding method, there is a possibility that misalignment defects (defects due to a difference in the end positions of the cathode and anode) of the electrodes (each anode and cathode) may occur. That is, as shown in FIG. 1B, the cutting should be performed while being supplied longer by a predetermined length so that the tip of the negative electrode 3 protrudes from the tip of the positive electrode 2, but the distance between the ends of the positive electrode 2 and the negative electrode 3 is formed smaller than the standard value or reversed due to the reaction speed of the cutter, the difference in tension formed between the positive electrode and the negative electrode during transport, and the like. In order to increase it, the cathode should protrude longer, but the anode protrudes more than the set length, causing a defect in contact between the cathode and anode).

Accordingly, in the prior art, some of the products are selected and sample tested before and after manufacturing the electrode assembly, but it is difficult to find all defective products through the sample test.

In addition, despite the inspection in the slitting process before the winding process, a mismatch defect (a defect in which the gap between the end position of the holding part applied to the upper surface and the end position of the holding part applied to the lower surface is greater than the allowable value, see FIG. 3) also occurred, so a countermeasure was also required.

Accordingly, the main object of the present invention is to provide a method and apparatus for manufacturing an electrode assembly capable of immediately detecting a misalignment defect (and a mismatch defect) in order to solve the conventional problems.

In order to achieve the above object, the present invention provides a method for manufacturing an electrode assembly in which an anode, a cathode, and a separator are wound together to form an electrode assembly. Setting the input amount of each of the anode, the cathode, and the separator during winding; fixing the ends of the anode, cathode, and separator to the winding core; winding the positive electrode, the negative electrode, and the separator together by rotating the winding core; monitoring the input state of each of the positive electrode and the negative electrode while the positive electrode and the negative electrode are input; Cutting each of the anode, cathode, and separator; and a defect determination step of calculating an end gap, which is a difference in distance between the end positions of the cut anode and the end position of the cut cathode, and determining a defect based on whether the calculated end gap is within a predetermined range.

In the present invention, the calculation of the end distance is calculated using the number of revolutions of the transfer motors rotating when each of the positive electrode and the negative electrode is input and the position of the cutter for cutting each of the positive electrode and the negative electrode as variables.

Further, if the product is determined to be defective, a step of separating and discharging the electrode assembly manufactured by being wound around the winding core from the electrode assembly determined to be good product may be optionally further included. In the step of separating and discharging, not only good products and defective products are discharged to different locations, but also a method of writing a separate defect mark on the defective products and discharging them is included.

In addition, the present invention may further include visually or audibly warning the occurrence of a defect if it is determined to be defective. That is, it is possible to quickly notify the operator of the occurrence of a defect by visually displaying a warning window on a monitor viewed by the operator or by notifying the operator of a warning message through a speaker.

In addition, in the method of the present invention, when a difference between the input amount set in the monitoring step and the monitored input amount occurs in the monitoring step (or after the monitoring step is finished), the calculated end interval is the cathode or anode. Determining whether correction is possible by changing the cutting position; and, if correction is possible, changing and cutting at least one cutting position of the cathode or anode so that the end gap is corrected to a normal range.

In the present invention, each of the positive electrode and the negative electrode is manufactured by coating the positive electrode active material or the negative electrode active material on both sides of a current collector, and has a structure in which a holding portion coated with the positive electrode active material or negative electrode active material and an uncoated uncoated portion are repeated. In each of the positive electrode and the negative electrode, an additional defect determination step of determining a defect is determined by determining whether a mismatch value, which is a distance between an end position of the holding part applied on one side and an end position of the holding part applied on the opposite side, is within a predetermined range.

In addition, the present invention further provides an apparatus for manufacturing an electrode assembly in which the manufacture of the electrode assembly is performed through the method as described above. The manufacturing apparatus according to the present invention includes a winding core for winding the positive electrode, the negative electrode, and the separator by rotating while the ends of the positive electrode, the negative electrode, and the separator are fixed together; A transfer unit for injecting the electrode into the winding core by the rotational force of the built-in transfer motor; A cutter disposed between the core and the transfer unit to cut the electrode introduced into the core; and a control unit that calculates an end gap, which is a difference in distance between the end positions of the cut anode and the end positions of the cut cathode, based on the number of rotations of the transfer motors of the anode and the cathode, the cutter position of the anode, and the cutter position of the cathode as variables, and determines whether the calculated end gap is within a predetermined range.

And, it further includes a guide roller for guiding the electrode to be moved while being bent toward the winding core, and the transfer unit is disposed between the guide roller and the winding core.

The guide roller, the conveying part, and the cutter are individually installed on the supply lines of the cathode and anode, respectively, and the cutter is configured to slide between the winding core and the conveying part.

Each of the negative electrode and the positive electrode is continuously formed on the upper and lower surfaces of the holding portion coated with the active material on the surface of the current collector and the uncoated portion on which the active material is not applied, and while the positive electrode or the negative electrode is introduced, the holding portion applied to the surface of one side of the positive electrode or the negative electrode. A first vision for sensing the end unit value of the holding portion; And a second vision for sensing an end unit value of the holding portion applied to the surface opposite to the positive electrode or cathode while the cathode or cathode is being input, wherein the control unit analyzes the data of the first vision and the second vision and additionally determines whether a defect has occurred by determining whether a mismatch value, which is a distance between an end position of the holding part applied to one surface of the anode or cathode wound from a winding core and an end position of the holding part applied to the opposite surface, is within a predetermined range.

The control unit may determine whether correction is possible when a difference between the input amount set and the input amount monitored occurs, and may control the cutter to generate a difference in length between the positive electrode and the negative electrode to be wound.

The cathode or anode is configured to pass through the first vision and the second vision before reaching the transfer portion.

In addition, a third vision for sensing an end unit value of the holding portion applied to one side or the opposite surface of the positive electrode or negative electrode while the positive electrode or negative electrode is being inserted, the third vision is disposed between the cutter and the winding core to additionally verify the data derived from the first and second visions and the misalignment size calculated by the control unit. In addition, when a defect occurs, the control unit may control a device that visually or audibly warns of the occurrence of a defect.

In the present invention having the configuration as described above, since it is possible to directly determine whether or not the electrode assembly is defective simultaneously with the production of the electrode assembly, the defective rate of the secondary battery in which the electrode assembly is embedded can be reduced. That is, in the production process of the electrode assembly, it is possible to monitor in real time the occurrence of defects in the electrode assembly due to misalignment (failure due to the end gap, which is the difference between the end position of the cut anode and the end position of the cut cathode). Trend management throughout the production process is possible.

In the present invention, since the misalignment is calculated through the number of rotations of the transfer motor and the position of the cutter while the cathode and anode are wound on the winding core, the misalignment can be determined with high accuracy.

In addition, since the present invention includes the first vision and the second vision, it is possible to additionally monitor and discriminate defects due to mismatch, which is the gap between the end position of the holding part applied to the upper surface of the electrode (cathode and anode) and the end position of the holding part applied to the lower surface, thereby further increasing production efficiency.

In addition, since a third vision disposed near the winding core is additionally included, the winding state is finally checked before determining a defect due to misalignment and mismatch, thereby increasing reliability of defect determination.

FIG. 1A is a simplified diagram illustrating a state in which a jelly roll type electrode assembly is manufactured in a conventional manner.
Figure 1b is a perspective view showing a state in which the end gap occurs at the cut portion of the negative electrode and the positive electrode.
Figure 2 is a front view showing a simplified appearance of the manufacturing apparatus according to a preferred embodiment of the present invention.
FIG. 3 is an enlarged view of a portion where a third vision is installed in FIG. 2 and an enlarged view of a mismatch between the top and bottom surfaces of an anode; FIG.
Figure 4 is a flow chart of a manufacturing method according to a preferred embodiment of the present invention.

Hereinafter, based on the accompanying drawings, the present invention will be described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

In addition, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventors should appropriately define the concept of terms in order to explain their invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

The present invention relates to a manufacturing apparatus and manufacturing method of an electrode assembly in which two electrodes (2 [anode] and 3 [negative electrode]) formed continuously on the upper and lower surfaces of a holding portion coated with an active material and a non-coated portion uncoated with the active material on the surface of a current collector (see FIG. 3) are wound at a core together with a separator 4 to form an electrode assembly, and the embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Example 1

The present invention provides an apparatus for manufacturing an electrode assembly as Example 1. As shown in FIG. 2, in this embodiment, the manufacturing apparatus has a winding core 10, a transfer unit 20, a cutter 60, a guide roller 70, a first vision 30, and a second vision 40 are disposed in each supply line of the anode 2 and the cathode 3.

The winding core 10 rotates by receiving rotational force from a motor or the like, and rotates by a predetermined number of revolutions while the ends of the positive electrode 2, the negative electrode 3, and the separator 4 are fixed together to wind the positive electrode 2, the negative electrode 3, and the separator 4 in a jelly roll form.

At this time, in the conveying unit 20, a built-in conveying motor (not shown) rotates so that the negative electrode 2 or positive electrode 3 can be smoothly supplied while maintaining an appropriate tension while winding is performed on the core 10.

In addition, when each of the electrodes 2 and 3 is inserted by a predetermined length, the cutter 60 is slidably disposed between the winding core 10 and the transfer unit 20 so as to cut each of the electrodes 2 and 3 (not shown in the drawing, but a separate cutter for cutting the separator by the control unit is also provided).

In the present invention, the transfer unit 20, the cutter 60, the winding core 10, the first vision 30, the second vision 40, and the third vision 80 are electrically connected to communicate with each other and control the operation. A control unit 50 is provided. The control unit 50 may be implemented as a control unit built into the manufacturing apparatus or a separate computing device that is separated from the manufacturing apparatus but is communicatively connected to the manufacturing apparatus.

That is, the control unit 50 controls the operation of the winding core 10, the cutter 60, and the conveying unit 20 according to pre-input logic, and calculates the distance between the ends of the positive electrode 2 and the negative electrode 3 (see FIG. 1B) in the electrode assembly wound around the core 10.

The distance between the ends of the positive electrode 2 and the negative electrode 3 is calculated according to predetermined logic input to the control unit based on information about the number of rotations of the transfer motor of the positive electrode 2 and the transfer motor of the negative electrode 3, the cutter position of the positive electrode 2, and the cutter position of the negative electrode 3. That is, when the rotation of the core 10 is finished, the end gap, which is the difference between the end position of the cut anode 2 and the end position of the cut cathode 3, can be calculated through information transmitted to the control unit 50, and the control unit 50 can determine whether the calculated end gap is within a predetermined range or not.

In addition, the control unit 50 determines whether correction is possible when a difference between the set input amount and the monitored input amount occurs, and generates a difference in length between the positive electrode 2 and the negative electrode 3 to be wound.

In addition, the device of the present invention may further include a guide roller 70 for guiding the electrodes 2 and 3 to be moved while being bent toward the winding core 10, and the guide roller 70 is the electrode.

Meanwhile, as described above, each of the positive electrode 2 and the negative electrode 3 used in the present invention has a structure in which uncoated portions are formed at a predetermined distance so that electrode tabs can be processed. That is, as shown in FIG. 3, each of the negative electrode 3 and the positive electrode 2 is formed so that the holding portion coated with the active material and the non-coated portion with the active material on the surface of the current collector are connected to each other. However, in the previous manufacturing step of the positive electrode 2 and the negative electrode 3, if the mismatch (see FIG. 3), which is the distance between the end position of the holding part applied to the upper surface and the end position of the holding part applied to the lower surface, exceeds the allowable range, there is a possibility that a reverse defect between the positive electrode and the negative electrode (a defect in which either the negative electrode or the positive electrode is wound in a state longer than a predetermined length and the negative electrode and the positive electrode contact each other) may occur.

Accordingly, in the device according to the present invention, the first vision 30, the second vision 40, and the third vision 80 are additionally provided so as to detect defects caused by such mismatches.

That is, as shown in FIG. 2 , the first vision 30 and the second vision 40 are arranged in pairs in each supply line of the anode 2 and the cathode 3 . In the present invention, the first vision 30 is disposed on the upper surface of the negative electrode 3 and the positive electrode 2 while the negative electrode 3 and the positive electrode 2 are input and senses the end unit of the holding portion applied to the upper surface of the current collector, and the second vision 40 is disposed on the opposite side of the first vision 30 and is disposed on the opposite side of the first vision 30 to sense the end unit of the holding portion applied to the lower surface of each of the negative electrode 3 and the positive electrode 2 while the negative electrode 3 and the positive electrode 2 are input. sense the teeth

The control unit 50 analyzes the data transmitted from the first vision 30 and the second vision 40, and additionally determines whether a defect has occurred by determining whether a mismatch value, which is a distance between the end position of the holding part applied to one surface of the anode 2 or cathode 3 wound on the core 10, and the end position of the holding part applied to the opposite surface is within a predetermined range.

The negative electrode 3 or the positive electrode 2 is configured to pass between the first vision 30 and the second vision 40 before reaching each conveying part 20, and a third vision 80 may be additionally disposed near the winding core 10. That is, while the positive electrode 2 or the negative electrode 3 is input, the third vision 80 is additionally disposed between the winding core 10 and the cutter 60 as shown in FIG.

The third vision 80 additionally verifies data derived from the first vision 30 and the second vision 40 and defects due to misalignment. That is, the third vision 80 monitors the situation in which the positive electrode 2 and the negative electrode 3 are wound around the core 10, and when cutting is performed by the cutter 60, it is possible to check once again whether the actual misalignment value between the negative electrode 3 and the positive electrode 2 is close to the calculated value. In addition, a plurality of the third vision 80 (selectively as needed) may be disposed on each of the anode 2 and the cathode 3 to optically sense whether each mismatch value is close to the calculated value.

At this time, in order to increase the accuracy of the optical sensing of the third vision 80, the cutter 60 cuts and immediately before the ends of the cathode 3 and the anode 2 are wound around the winding core 10 (while the ends of the cathode and anode pass through the third vision), the controller 50 may decelerate the rotational speed of the winding core 10 as needed. In addition, it is also possible to additionally sense through the third vision 80 only when the calculated misalignment value or mismatch value is abnormal in order to prevent a decrease in production speed. In addition, if the mismatch value is known through the information obtained through the first vision 30 and the second vision 40, if the end unit value of the holding part (either on the upper or lower surface) is known, the position of the end of the holding part on the opposite side can be estimated. Based on this, it is also possible to control the transfer motor (embedded in the transfer unit) to suppress defects due to misalignment.

In addition, when a defect occurs, the control unit 50 may notify the occurrence of a defect by interlocking with or controlling a device that visually or audibly warns the occurrence of a defect, such as a speaker or a monitor screen of a worker's computer.

Example 2

In addition, the present invention provides a method for manufacturing an electrode assembly as Example 2. The manufacturing method according to the present invention is performed according to the steps shown in the flowchart shown in FIG. 3 through the manufacturing apparatus described above, but at this time, the order may be determined differently. For example, the step of notifying the occurrence of a defective product may be performed before discharging the defective product, the cutter 60 may be moved to a specific position before winding is performed, and the positive electrode 2, the negative electrode 3 and the separator 4 may be fixed to the winding core 10, and then the input amount may be set. However, a key feature of the manufacturing method according to the present invention is that defects caused by misalignment (and mismatch) are monitored in real time and defects are determined while the electrode assembly is being manufactured according to the rotation of the winding core 10 .

The present invention is a method of manufacturing an electrode assembly by winding a positive electrode (2), a negative electrode (3), and a separator (4) together to manufacture an electrode assembly, as shown in FIG. fixing the ends of the anode 2, the cathode 3, and the separator 4 to the winding core 10; winding the positive electrode 2, the negative electrode 3, and the separator 4 together by rotating the core 10; monitoring the input state of each of the positive electrode 2 and the negative electrode 3 while the positive electrode 2 and the negative electrode 3 are input; Cutting each of the positive electrode 2, the negative electrode 3, and the separator 4; and a defect judgment step of calculating an end gap, which is a difference in distance between the end position of the cut anode 2 and the end position of the cut cathode 3, and judging a misalignment defect based on whether or not the calculated end gap is within a predetermined range.

In the present invention, the calculation of the end gap is calculated using the number of rotations of the transfer motors rotating when each of the positive electrode 2 and the negative electrode 3 is input and the position of the cutter 60 that cuts each of the positive electrode 2 and the negative electrode 3 as variables.

On the other hand, in the method of the present invention, if there is a difference between the input amount set before the cutter 60 cuts and the input amount monitored (calculated using the number of rotations of the transfer motors and the position of the cutter cutting each of the positive and negative electrodes as a variable), the calculated end distance compensates for or offsets the difference based on the monitored input amount that is the same as or relatively closer to the actual input amount. A step of cutting by changing the cutting position of at least one of the negative electrode 3 or the positive electrode 2 so as to be corrected to a normal range is further included.

That is, in the present invention, during the monitoring step (or after the end of the monitoring step), the difference between the initially set input amount and the monitored input amount is compared. If the difference does not occur or if the difference can be ignored even if it occurs (if the difference is within a predetermined range), the electrodes 2 and 3 and the separator 4 are cut according to the set value.

On the other hand, if a difference greater than the predetermined range occurs, it is determined according to a predetermined logic through the received information (anode and cathode cutter position, rotational speed of each of the anode and cathode, rotational speed of the winding core, etc.) to compensate for or eliminate the difference by adjusting the cutting position of the cutter 60 or changing the cutting time point. And, if correction is impossible, the cutter 60 cuts according to the original setting value and determines that it is defective, and if correction is possible, the cutting position and / or cutting time of the cutter 60 is adjusted to compensate for the input amount difference. Cutting is made.

Next, a misalignment value is derived by comparing the input amounts of the positive electrode 2 and the negative electrode 3, and a defect is determined by determining whether the derived value is within the allowable range. At this time, as described above, the misalignment value is additionally measured optically through the third vision 80 additionally disposed near the winding core 10, and the optically measured value is compared with the value derived through calculation to verify whether the defect is certain or not.

On the other hand, each of the positive electrode (2) and the negative electrode (3) in the present invention is manufactured by coating a positive electrode active material or negative electrode active material on both sides of a current collector, and has a structure in which a holding portion coated with the positive electrode active material or negative electrode active material and an uncoated uncoated portion are repeated. And in the present invention, the mismatch value, which is the distance between the end position of the holding part applied to one surface and the end position of the holding part applied to the opposite surface in each of the positive electrode 2 and the negative electrode 3, is within a predetermined range. An additional defect determination step of determining a defect is further included.

Then, when it is determined that the product is defective, the electrode assembly manufactured by being wound around the winding core 10 is separated from the electrode assembly that is determined to be good and discharged. In the step of separating and discharging, not only good products and defective products are discharged to different locations, but also a method of writing a separate defect mark on the defective products and discharging them is included.

In addition, the present invention may further include visually or audibly warning the occurrence of a defect if it is determined to be defective. That is, it is possible to quickly notify the operator of the occurrence of a defect by visually displaying a warning window on a monitor viewed by the operator or by notifying the operator of a warning message through a speaker.

In the present invention having the configuration as described above, since it is possible to directly determine whether or not the electrode assembly is defective simultaneously with the production of the electrode assembly, the defective rate of the secondary battery in which the electrode assembly is embedded can be reduced. That is, in the production process of the electrode assembly, since occurrence of defects in the electrode assembly due to misalignment can be monitored in real time, trend management throughout the production process is possible.

In the present invention, while the cathode 3 and the anode 2 are wound around the winding core 10, the misalignment is calculated through the number of rotations of the feed motor and the position of the cutter 60 while the cathode 3 and the anode 2 are input, respectively. Therefore, it is possible to determine whether a defect is defective with high accuracy, and even if a defect occurs, if it is within the correctable range, it is possible to correct the defect, thereby further reducing the defect rate of the product.

In addition, since the present invention includes the first vision 30 and the second vision 40, it is possible to additionally monitor and determine defects due to mismatch, which is the difference between the end position of the holding part applied to the upper surface of the electrode (cathode and anode) and the end position of the holding part applied to the lower surface, thereby further increasing production efficiency.

In addition, since the third vision 80 disposed near the winding core 60 is additionally included, the winding state can be finally checked before determining a defect due to misalignment and mismatch, thereby increasing reliability of defect determination.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the claims below will be described below by those skilled in the art to which the present invention belongs. Various implementations are possible.

2: anode
3: cathode
10: Kwon Shim
20: transfer unit
30: 1st vision
40: Second Vision
50: control unit
60: cutter
80: 3rd vision

Claims (14)

delete delete delete delete delete delete In the manufacturing apparatus of an electrode assembly for manufacturing an electrode assembly by winding a positive electrode, a negative electrode, and a separator together,
Winding cores for winding the positive electrode, the negative electrode, and the separator by rotating while the ends of the positive electrode, the negative electrode, and the separator are fixed together;
A transfer unit for injecting the electrode into the winding core by the rotational force of the built-in transfer motor;
A cutter disposed between the core and the transfer unit to cut the electrode introduced into the core; and
A control unit for determining a defect based on whether the calculated end interval is within a predetermined range,
Each of the negative electrode and the positive electrode is formed so that the holding portion coated with the active material on the surface of the current collector and the plain portion uncoated with the active material are damaged, respectively.
a first vision for sensing an end unit value of a holding unit applied to one surface of the positive electrode or negative electrode while the positive electrode or negative electrode is input; and a second vision for sensing an end unit value of a holding unit applied to a surface opposite to the positive electrode or negative electrode while the positive electrode or the negative electrode is being inserted. Including more,
The controller analyzes the data of the first vision and the second vision, and further determines whether a defect occurs by determining whether a mismatch value, which is the distance between the end position of the holding part applied to one surface of the anode or cathode wound on the winding core and the end position of the holding part applied to the opposite surface, is within a predetermined range,
Further comprising a third vision for sensing the end unit value of the holding portion applied to the surface of one side or the opposite side of the positive electrode or negative electrode while the positive electrode or negative electrode is introduced,
the cathode or anode is configured to pass through a first vision and a second vision before reaching the transport;
The third vision is an apparatus for manufacturing an electrode assembly, characterized in that disposed between the cutter and the winding core.
According to claim 7,
Further comprising a guide roller for guiding the electrode to be moved while being bent toward the winding core,
The transfer unit manufacturing apparatus of the electrode assembly, characterized in that disposed between the guide roller and the winding core.
According to claim 8,
The guide roller, the transfer unit, and the cutter are manufacturing apparatus of an electrode assembly, characterized in that individually installed in the supply line of each of the cathode and anode.
According to claim 8,
The apparatus for manufacturing an electrode assembly, characterized in that the cutter is slidable between the winding core and the transfer unit.
delete delete delete According to any one of claims 8 to 10,
The control unit controls a device that visually or audibly warns of the occurrence of a defect when a defect occurs.

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