Foreign matter removing device for secondary battery cutout

Abstract

Preferably, the secondary battery cut-out foreign matter removing device according to one example of the present application includes a foreign matter confirmation section provided so that an upper surface and a lower surface of an electrode pattern being cut out are photographed in a conveyance path of an electrode film via a cutting process, and a position of a foreign matter present in the electrode pattern is calculated based on the photographed image, and a foreign matter removing process section provided so that air is sprayed to the position of the foreign matter and vacuum pressure is applied thereto according to the foreign matter position information calculated by the foreign matter confirmation section.

Description

Technical Field

[0001] The present invention relates to a foreign matter removal device for a secondary battery cut, and more particularly, to a foreign matter removal device for a secondary battery cut that can identify the location of foreign matter attached to the electrode film before the foreign matter removal process, and then centrally clean the part containing the foreign matter.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0048528, filed on April 14, 2021, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] Typically, a secondary battery is a battery that can power an external circuit by converting chemical energy into electrical energy during discharge, and stores electricity by receiving an external power source to convert electrical energy into chemical energy. Various types exist, such as nickel-cadmium, lithium-ion, nickel-metal hydride, and lithium polymer batteries.

[0004] This type of secondary battery is manufactured by applying active materials to the surface of the electrode current collector to form positive and negative electrodes, and inserting a separator between them to form an electrode assembly. The electrode assembly is then installed inside a cylindrical metal can, a polygonal metal can, or an aluminum laminated bag-type housing. Liquid electrolyte is then injected or impregnated into the electrode assembly, or a solid electrolyte is used.

[0005] Here, the electrode assembly is manufactured in various sizes according to the size and shape of the housing and the capacity required in the field of use. For this purpose, it is necessary to cut the electrodes and diaphragms that constitute the electrode assembly into slits of predetermined sizes.

[0006] In the cutting process of secondary batteries, molds or lasers are used, and in the cutting process, foreign matter from the active material, Al foreign matter from the positive electrode, or Cu foreign matter from the negative electrode is generated during the cutting of the electrodes.

[0007] Some of the foreign matter generated during the cutting process adheres to the electrodes and causes short circuits in the battery. To prevent this, a foreign matter removal process is typically performed to remove the foreign matter that adhered to the electrode plates during the cutting process.

[0008] Korean Patent No. 10-1569798 discloses the process of removing foreign matter adhering to the surface of the electrode film F after the cutting process.

[0009] like Figure 1As shown, the cleaning unit 41 is movably mounted vertically on the underside of the roller 43 and removes foreign matter while attaching the electrode film F to the roller 43. The cleaning unit 41 includes a cleaning block 45, a brush 46, an air jet 47, and a foreign matter suction device 48.

[0010] Cleaning blocks 45 are movably mounted on the lower and upper sides of the first roller 43 and the second roller, respectively. Brushes 46 are mounted on the upper or lower end of the cleaning blocks 45 to contact the electrode film F, thereby separating foreign matter. An air jet 47 is mounted on one side of the cleaning blocks 45 to jet air toward the brushes 46.

[0011] The foreign object suction device 48 is installed in the cleaning block 45 at a position opposite to the air jet 47 to suction foreign objects separated from the brush 46 by the air jet 47.

[0012] According to Korean Patent Registration No. 10-1569798, a foreign matter removal process is performed using a cleaning unit 41 to remove foreign matter attached to the surface of the electrode film F after shearing. However, despite this foreign matter removal process, there is still a problem that foreign matter attached to the electrode film F is not removed. Subsequently, the foreign matter attached to the electrode film F can cause a short circuit fault in the battery. Summary of the Invention

[0013] Technical issues

[0014] The present invention was designed to solve the above problems. Its purpose is to provide a foreign matter removal device for secondary battery cuts that can identify the location of foreign matter attached to the electrode film before the foreign matter removal process, and then centrally clean the part containing foreign matter.

[0015] Technical solution

[0016] Preferably, a foreign object removal device for a secondary battery cut according to an example of the present invention includes: a foreign object confirmation unit, which is configured to photograph the upper and lower surfaces of the cut electrode pattern in the transport path of the electrode film via the cutting process, and calculate the position of a foreign object present in the electrode pattern based on the photographed image; and a foreign object removal process unit, which is configured to spray air to the position of the foreign object and apply vacuum pressure thereto according to the foreign object position information calculated by the foreign object confirmation unit.

[0017] In one example of the present invention, preferably, the foreign object detection unit includes: a plurality of upper cameras arranged in a row above the electrode film along the width direction of the electrode film to capture the upper surface of the electrode pattern for each segment; a plurality of lower cameras arranged in a row below the electrode film along the width direction of the electrode film to capture the lower surface of the electrode pattern for each segment; and an image reading unit for calculating the position of the foreign object based on a plurality of upper segment images and a plurality of lower segment images having position information of each segment along the width direction of the electrode film.

[0018] In one example of the invention, preferably, the foreign matter removal process sprays air onto each segment of a surface of the electrode film, but is configured to spray the entire area of ​​the segment or only a predetermined area within the entire area.

[0019] In one example of the present invention, preferably, the foreign object removal process includes: a foreign object blowing unit, which is used to spray air to the position of the foreign object according to the foreign object position information of the foreign object confirmation unit; and a foreign object suction unit, which is installed in the transport path of the electrode film and is used to apply vacuum pressure to the position of the foreign object based on the foreign object position information to suction the foreign object blown from the electrode pattern.

[0020] In one example of the present invention, preferably, the foreign matter purging unit includes: a purging body having air injection holes in which air is injected onto a surface facing the electrode pattern; and a plurality of air holes disposed in the purging body, the plurality of air holes communicating with the air injection holes and arranged in a row along the width direction of the electrode film, wherein the plurality of air holes are assigned to each segment of the electrode pattern according to the arrangement order in the width direction of the electrode film.

[0021] In one example of the present invention, preferably, the foreign object purging unit further includes: an air control unit, which adjusts to open and close, and opens an air hole that matches the foreign object location information and closes an air hole that does not match the foreign object location information.

[0022] In one example of the invention, preferably, the plurality of air holes are configured for each segment, and the air control unit adjusts the number of air holes opened for each segment to adjust the flow rate of air sprayed to the location of the foreign object.

[0023] In one example of the present invention, preferably, at least three of the plurality of air holes are provided for each section, and the air control unit adjusts the number of air holes opened to adjust the air flow intensity to strong / medium / weak.

[0024] In one example of the invention, preferably, the air jet hole is an opening with an area larger than that of the electrode pattern.

[0025] In one example of the present invention, preferably, the foreign matter suction unit includes: a suction body, the suction body being provided with a main suction hole and a plurality of secondary suction holes, the main suction hole being on the surface facing the electrode pattern, the plurality of secondary suction holes being disposed in the suction body, communicating with the main suction hole, and arranged in a row along the width direction of the electrode film, wherein the plurality of secondary suction holes are assigned to each segment of the electrode pattern according to the arrangement order in the width direction of the electrode film.

[0026] In one example of the present invention, preferably, the foreign object suction unit further includes: a vacuum pressure control unit, which adjusts the opening and closing of each auxiliary suction port, and opens the auxiliary suction port that matches the foreign object position information, and closes the auxiliary suction port that does not match the foreign object position information.

[0027] In one example of the invention, preferably, the plurality of secondary suction holes are configured for each segment, and the vacuum pressure control unit adjusts the number of openings of the plurality of secondary suction holes allocated to each segment to adjust the intensity of the vacuum pressure applied to the location of the foreign object.

[0028] In one example of the present invention, preferably, at least three of the plurality of secondary suction holes are provided for each section, and the vacuum pressure control unit adjusts the number of the secondary suction holes to open so as to adjust the intensity of the vacuum pressure to strong / medium / weak.

[0029] In one example of the invention, preferably, the main suction hole is an opening with an area larger than that of the electrode pattern.

[0030] Preferably, according to an example of the invention, a foreign object removal apparatus for cutting a secondary battery includes: a foreign object confirmation unit configured to photograph at least one of the upper and lower surfaces of the cut electrode pattern along the width direction of the electrode pattern in a transport path of the electrode film via the cutting process, and to calculate the location of a foreign object present in the electrode pattern based on the photographed images; and a foreign object removal process unit configured to spray air onto the entire area of ​​the segment where the foreign object is located, or to concentrate air onto a predetermined area within the entire area, and to apply a vacuum pressure thereon, based on the foreign object location information calculated by the foreign object confirmation unit.

[0031] Beneficial effects

[0032] Existing technologies perform foreign matter removal processes over the entire area of ​​the electrode membrane, while the present invention identifies the location of foreign matter attached to the electrode membrane before the foreign matter removal process, and then focuses on cleaning the portion containing foreign matter, thereby improving the efficiency of foreign matter removal from the electrode membrane. Attached Figure Description

[0033] Figure 1 The schematic diagram illustrates the process of removing foreign objects after the cutting process of a secondary battery, according to the prior art.

[0034] Figure 2 The schematic diagram illustrates a foreign object removal device for a secondary battery cut according to an example of the present invention.

[0035] Figure 3 The diagram illustrates the construction of a foreign object removal device for a secondary battery cut according to an example of the present invention.

[0036] Figure 4 This is a diagram illustrating an example of the arrangement of cameras for capturing electrode patterns for each segment using multiple cameras, according to an embodiment of the present invention.

[0037] Figure 5 and Figure 6 This is a diagram illustrating a foreign matter purging section in one example of the present invention;

[0038] Figure 7 and Figure 8 This is a diagram illustrating a foreign body suction unit in one example of the present invention.

[0039] Figures 9 to 12 This diagram illustrates the operational status of the foreign matter removal process when foreign matter adheres to the electrode pattern. Detailed Implementation

[0040] Hereinafter, a preferred embodiment of a foreign matter removal device for a secondary battery cut according to the present invention will be described with reference to the accompanying drawings.

[0041] Reference Figure 2 and Figure 3 The foreign matter removal device 100 for secondary battery cutting is a device including a cutting process section 110, a foreign matter confirmation section 120, and a foreign matter removal process section 130. The device is used to photograph the electrode pattern P after the cutting process to confirm whether there are any foreign objects in the electrode pattern P, and then to clean the part of the electrode pattern P where foreign objects are present.

[0042] The cutting process unit 110 cuts the electrode film moving in one direction along the film transport path using a preset electrode pattern P. The cutting process unit 110 consists of a cutting drum 111 and a laser irradiation unit 112, wherein the electrode film F1 passing through the cutting drum 111 is irradiated by a laser L to form the electrode pattern P on the electrode film. The cutting process of secondary batteries is known technology, so a detailed description of the cutting process unit 110 will be omitted here.

[0043] The foreign object detection unit 120 captures images of the upper and lower surfaces of the electrode pattern P in the transport path of the electrode film, and reads the captured images to calculate the location of any foreign objects present in the electrode pattern. The foreign object detection unit 120 includes multiple cameras 121-123, 126-128 and an image reading unit 129.

[0044] Multiple cameras 121-123 and 126-128 are mounted to capture images of the upper and lower surfaces of the electrode pattern P, which has passed through the cutting process section 110 in the electrode film transport path. In this example, for ease of explanation, the multiple cameras 121-123 and 126-128 will be designated as the first upper camera 121, the second upper camera 122, the third upper camera 123, the first lower camera 126, the second lower camera 127, and the third lower camera 128, depending on their mounting positions.

[0045] Reference Figure 4 The first upper camera 121 to the third upper camera 123 are arranged in a row above the electrode film F2 along the width direction W of the electrode film to capture the upper surface of the electrode pattern P for each segment S1, S2, S3. The first lower camera 126 to the third lower camera 128 are arranged in a row below the electrode film F2 along the width direction W of the electrode film to capture the lower surface of the electrode pattern P for each segment S1, S2, S3.

[0046] The electrode pattern P is divided into multiple segments S1, S2, and S3 along the width direction W of the electrode film, and the number of segments can be varied depending on the number of cameras installed. For example... Figure 4As shown, when three upper cameras capture images of the upper surface of the electrode pattern P, the upper surface of the electrode pattern P is divided into three segments. If four upper cameras capture images of the upper surface of the electrode pattern P, the upper surface of the electrode pattern P can be divided into four segments.

[0047] The image reading unit 129 reads multiple upper segment images and multiple lower segment images captured for each segment S1, S2, S3, and confirms whether there are any foreign objects in the electrode pattern P, thereby selecting the foreign object segment among the multiple segments S1, S2, S3 where foreign objects are present, and confirming the position of the foreign object in the foreign object segment.

[0048] In this example, for multiple upper segment images, the upper surface of the first segment S1 captured by the first upper camera 121 is referred to as the first upper segment image; the upper surface of the second segment S2 captured by the second upper camera 122 is referred to as the second upper segment image; and the upper surface of the third segment S3 captured by the third upper camera 123 is referred to as the third upper segment image.

[0049] Then, in this example, for multiple lower segment images, the lower surface of the first segment S1 captured by the first lower camera 126 is referred to as the first lower segment image; the lower surface of the second segment S2 captured by the second lower camera 127 is referred to as the second lower segment image; and the lower surface of the third segment S3 captured by the third lower camera 128 is referred to as the third lower segment image.

[0050] In the image reading unit 129, position information of each segment of the image captured by each camera is set according to the camera's mounting position. When reading the image, the information of the segment containing the foreign object is calculated, and the position information of the foreign object is calculated based on the specifications of the foreign object segment. In this example, the segment containing the foreign object among the multiple segments S1, S2, and S3 of the electrode pattern P is called the "foreign object segment".

[0051] Foreign matter present in the electrode pattern P is cleaned in the foreign matter removal process unit 130. The foreign matter removal process unit 130 is installed in the transport path of the electrode film, and sprays air into the foreign matter section of the electrode pattern P according to the foreign matter position information of the image reading unit 129, and then applies vacuum pressure to it, thereby sucking up the foreign matter in the foreign matter section to remove the foreign matter from the electrode pattern P.

[0052] The foreign object removal process unit 130 includes a foreign object blowing unit 140 and a foreign object suction unit 150.

[0053] The foreign matter purging unit 140 sprays air in a concentrated manner onto the foreign matter section of the electrode pattern P, and purges the foreign matter in the foreign matter section. The foreign matter purging unit 140 is mounted facing the upper and lower surfaces of the electrode film.

[0054] In this example, for ease of explanation, the foreign matter purging section 140 mounted on the upper part of the electrode film is referred to as the upper purging section 140a, and the foreign matter purging section 140 mounted on the lower part of the electrode film is referred to as the lower purging section 140b. Except for their installation positions, the upper purging section 140a and the lower purging section 140b have the same structure and operation method. Therefore, to avoid repetition, the upper purging section 140a will be described below.

[0055] Reference Figure 5 The upper purging unit 140a includes a purging body 141a and an air control unit 144. The purging body 141a is provided with an air injection hole 142a and a plurality of air holes 143a to 143i.

[0056] Air injection hole 142a is an opening through which air supplied from air control unit 144 is injected toward electrode pattern P. Air injection hole 142a is provided on the surface facing electrode pattern P. Air injection hole 142a is configured to be larger than the area of ​​electrode pattern P.

[0057] Multiple air holes 143a to 143i are arranged in a row along the width direction W of the electrode film. Multiple air holes 143a to 143i are provided in the purging body 141a to communicate with the air injection hole 142a.

[0058] Multiple air holes 143a to 143i are provided with at least three for each section S1, S2, and S3, so that the intensity of the air injected into each section S1, S2, and S3 can be adjusted to strong / medium / weak by the number of air holes opened.

[0059] In this example, for ease of explanation, the multiple air holes of the upper purge section 140a and the lower purge section 140b are divided according to their arrangement order in the width direction W of the electrode film and are referred to as the first air holes 143a, 143a1 to the ninth air holes 143i, 143i1.

[0060] The first air holes 143a, 143a1 to the ninth air holes 143i, 143i1 are assigned to each segment S1, S2, S3 of the electrode pattern P according to their arrangement order in the width direction W of the electrode film. For example, when the electrode pattern P is divided into three segments, the first air holes 143a, 143a1 to the third air holes 143c, 143c1; the fourth air holes 143d, 143d1 to the sixth air holes 143f, 143f1; and the seventh air holes 143g, 143g1 to the ninth air holes 143i, 143i1 are respectively assigned as air holes for supplying air to the first segment S1, the second segment S2, and the third segment S3 of the electrode pattern P.

[0061] The air control unit 144 adjusts the opening and closing of each air hole, opening air holes that match the foreign object location information of the image reading unit 129 and closing air holes that do not match the foreign object location information. The air control unit 144 can adjust the flow rate of air injected into the foreign object section by opening and closing at least three air holes allocated to each section S1, S2, S3.

[0062] Air introduced through the air supply port 144j flows through the open air port to the purging body 141a, and is injected into the electrode pattern P through the air injection port 142a.

[0063] By selectively opening and closing multiple air holes 143a to 143i by the air control unit 144, the present invention can also spray air onto the entire area of ​​the section selected as the foreign object section, but the air can be concentratedly sprayed onto the location where the foreign object exists in the foreign object section by specifying the location of the foreign object.

[0064] The foreign matter suction unit 150 is installed parallel to the foreign matter purging unit 140. The foreign matter suction unit 150 applies vacuum pressure to the electrode pattern P based on the foreign matter position information of the image reading unit 129, and suctions the foreign matter blown away from the electrode pattern P by the foreign matter purging unit 140, thereby removing the foreign matter from the electrode pattern P.

[0065] The foreign matter suction section 150 is mounted facing the upper and lower surfaces of the electrode film F2. Therefore, in this example, for ease of explanation, the foreign matter suction section 150 mounted on the upper part of the electrode film is referred to as the upper suction section 150a, and the foreign matter suction section 150 mounted on the lower part of the electrode film is referred to as the lower suction section 150b. Except for the difference in their mounting positions, the upper suction section 150a and the lower suction section 150b have the same structure and operation method. Therefore, to avoid repetition, the upper suction section 150a will be described below.

[0066] Reference Figure 7 The upper suction section 150a includes a suction body 151a and a vacuum pressure control section 154. The suction body 151a is provided with a main suction port 152a and multiple auxiliary suction ports 153a to 153i.

[0067] The main suction port 152a is an opening through which vacuum pressure supplied from the vacuum pressure control unit 154 is supplied toward the electrode pattern P. The main suction port 152a is provided on the surface facing the electrode pattern P. The main suction port 152a is configured to be larger than the area of ​​the electrode pattern P.

[0068] Multiple auxiliary suction holes 153a-153i are arranged in a row along the width direction W of the electrode film. These auxiliary suction holes 153a-153i are disposed within the suction body 151a and communicate with the main suction hole 152a. At least three auxiliary suction holes 153a-153i are provided for each segment S1, S2, and S3, thereby adjusting the intensity of the vacuum pressure applied to each segment S1, S2, and S3 to strong / medium / weak depending on the number of open auxiliary suction holes.

[0069] The vacuum pressure control unit 154 adjusts the opening and closing of each auxiliary suction port, opening auxiliary suction ports that match the foreign object position information of the image reading unit 129 and closing auxiliary suction ports that do not match the foreign object position information. The vacuum pressure control unit 154 can adjust the intensity of the vacuum pressure supplied to the foreign object section by opening and closing at least three auxiliary suction ports allocated to each section S1, S2, S3.

[0070] Vacuum pressure flows to the suction body 151a through the vacuum pressure supply port 154j and the open secondary suction port, and is supplied to the electrode pattern P through the main suction port 152a. The vacuum pressure is not applied to the entire area of ​​the electrode pattern P, but is applied in a limited manner to the portion selected as the foreign object section and / or the foreign object location. When the foreign object is successfully suctioned into the suction body 151a by the vacuum pressure, the vacuum pressure control unit 154 releases the vacuum pressure applied to the main suction port 152a.

[0071] In this example, for ease of explanation, the multiple auxiliary suction holes of the upper suction part 150a and the lower suction part 150b are divided and referred to as the first suction hole 153a, 153a1 to the ninth suction hole 153i, 153i1 according to the arrangement order in the width direction W of the electrode film.

[0072] The first suction holes 153a, 153a1 to the ninth suction holes 153i, 153i1 are assigned to each segment S1, S2, S3 of the electrode pattern P according to their arrangement order in the width direction W of the electrode film. For example, when the electrode pattern P is divided into three segments, the first suction holes 153a, 153a1 to the third suction holes 153c, 153c1; the fourth suction holes 153d, 153d1 to the sixth suction holes 153f, 153f1; and the seventh suction holes 153g, 153g1 to the ninth suction holes 153i, 153i1 are respectively assigned as auxiliary suction holes for supplying vacuum pressure to the first segment S1, the second segment S2, and the third segment S3 of the electrode pattern P.

[0073] In the following text, when a foreign object is present in the electrode pattern P, reference will be made to... Figures 9 to 12 Describe the process for removing foreign objects.

[0074] In the foreign object removal process described below, it is assumed that the electrode pattern P is captured by multiple cameras 121-123 and 126-128 according to the above process, and the location of the foreign object present in the electrode pattern P is calculated based on the multiple upper segment images and multiple lower segment images captured.

[0075] For example, such as Figure 9 and Figure 10 As shown, when a foreign object adheres to the lower and upper surfaces of the electrode pattern P, the image reading unit 129 calculates the foreign object segment as the lower surface of the first segment S1 and the upper surface of the second segment S2 of the electrode pattern P.

[0076] When foreign matter is distributed over the entire area of ​​the lower surface of the first section S1, the lower purging part 140b opens the first air hole 143a1 to the third air hole 143c1 corresponding to the lower surface of the first section S1, and closes the fourth air hole 143d1 to the ninth air hole 143i1 allocated to the remaining sections.

[0077] Therefore, air flows through the first air hole 143a1 to the third air hole 143c1 to the air injection hole 142b and is injected onto the lower surface of the first section S1. Foreign matter present on the lower surface of the first section S1 is swept away by air and removed by the lower suction unit 150b.

[0078] Reference Figure 10 The lower suction unit 150b applies vacuum pressure to the air jet range of the lower purging unit 140b to remove foreign matter from the lower surface of the first section S1. Specifically, the lower suction unit 150b opens the first suction holes 153a1 to the third suction hole 153c1 corresponding to the lower surface of the first section S1, and closes the fourth suction holes 153d1 to the ninth suction hole 153i1 allocated to the remaining sections. Therefore, vacuum pressure flows through the first suction holes 153a1 to the third suction holes 153c1 to the main suction hole 152b and is supplied to the lower surface of the first section S1. Foreign matter present on the lower surface of the first section S1 is drawn into the main suction hole 152b by the vacuum pressure. When the foreign matter removal is completed, the vacuum pressure control unit of the lower suction unit 150b releases the vacuum pressure applied through the first suction holes 153a1 to the third suction holes 153c1.

[0079] In addition, such as Figure 9As shown, when a foreign object is present only in the center of the upper surface of the second segment S2, the upper purging section 140a only opens the fifth air hole 143e for injecting air into the center of the second segment S2, and closes the remaining air holes. Therefore, air flows through the fifth air hole 143e of the upper purging section 140a to the air injection hole 142a, and is injected onto the upper surface of the second segment S2 to purge the foreign object. Through the operation of the upper suction section 150a, the foreign object purged from the upper surface of the second segment S2 is removed from the electrode pattern P.

[0080] The upper suction section 150a opens only the fifth suction port 153e and closes the other auxiliary suction ports, so that vacuum pressure is applied only to the fifth suction port 153e. The vacuum pressure is supplied to the main suction port 152a through the fifth suction port 153e to suction foreign matter present in the center of the second section S2. The foreign matter is removed from the electrode pattern P while being drawn into the main suction port 152a by the vacuum pressure.

[0081] As another example, see Figure 11 and Figure 12 When foreign matter is distributed in the second section S2 and the third section S3 on the lower surface of the electrode pattern P, the operation of the foreign matter removal process section 130 will be described below.

[0082] As a result of the image reading unit 129, when there are no foreign objects on the upper surface of the electrode pattern P, the upper purging unit 140a and the upper suction unit 150a do not operate.

[0083] like Figure 11 As shown, when foreign matter is distributed on the lower surface of the second section S2 and a portion of the lower surface of the third section S3, the lower purging unit 140b selectively opens only six air holes 143f1 to eight air holes 143h1 among the fourth air holes 143d1 to the ninth air holes 143i1 allocated to the lower surface of the second section S2 and the lower surface of the third section S3, based on the foreign matter location information from the image reading unit 129. This allows it to spray air only onto the portion containing the foreign matter. The foreign matter purged from the lower surface of the second section S2 and the lower surface of the third section S3 by the operation of the lower purging unit 140b is removed from the electrode pattern P by the lower suction unit 150b.

[0084] Reference Figure 12 The lower suction section 150b opens only the sixth suction port 153f1 to the eighth suction port 153h1 and applies vacuum pressure to the main suction port 152b, thereby suctioning foreign objects from the lower surface of the second section S2 and the lower surface of the third section S3.

[0085] In the manner described above, the present invention applies vacuum pressure to only the part containing foreign matter based on the foreign matter location information of the image reading unit 129 to suck up the foreign matter, thereby enabling concentrated cleaning of only the part containing foreign matter.

[0086] Those skilled in the art will understand that the present invention can be implemented in other specific forms without altering its technical spirit or essential features.

[0087] Therefore, it should be understood that the above examples are illustrative in all respects, not restrictive.

[0088] Industrial applicability

[0089] This invention improves the efficiency of removing foreign matter from the electrode membrane by identifying the location of foreign matter attached to the electrode membrane before the foreign matter removal process and then cleaning the part containing foreign matter in a concentrated manner.

Claims

1. A foreign matter removal device for a cut in a secondary battery, characterized in that, include: A foreign object detection unit is configured to photograph the upper and lower surfaces of the cut electrode pattern during the transport path of the electrode film via the cutting process, and calculate the location of any foreign objects present in the electrode pattern based on the photographed images; and The foreign object removal process unit is configured to spray air onto the location of the foreign object and apply vacuum pressure thereto, based on the foreign object location information calculated by the foreign object confirmation unit. The foreign object detection unit includes: Multiple upper cameras are arranged in a row above the electrode film along the width direction of the electrode film to capture the upper surface of the electrode pattern for each segment; A plurality of lower cameras are arranged in a row below the electrode film along the width direction of the electrode film to image the lower surface of the electrode pattern for each segment; and An image reading unit is configured to calculate the position of the foreign object based on multiple upper segment images and multiple lower segment images having position information of each segment along the width direction of the electrode film. The image reading unit selects the foreign object segment among multiple segments, confirms the location of the foreign object within that segment, and... The foreign matter removal process involves injecting air into the foreign matter section and applying vacuum pressure to it.

2. The foreign matter removal device for a secondary battery cut according to claim 1, wherein, The foreign matter removal process sprays air onto each segment of a surface of the electrode film, but is configured to spray the entire area of ​​the segment or only a predetermined area within the entire area.

3. The foreign matter removal device for the incision of a secondary battery according to claim 1, characterized in that, The foreign matter removal process includes: Foreign object purging unit, the foreign object purging unit being used to spray air to the location of the foreign object based on the foreign object location information of the foreign object confirmation unit; and A foreign object suction unit is installed in the transport path of the electrode membrane. The foreign object suction unit is used to apply vacuum pressure to the position of the foreign object based on the foreign object position information in order to suction the foreign object blown away from the electrode pattern.

4. The foreign matter removal device for a secondary battery cut according to claim 3, characterized in that, The foreign object purging unit includes: A purging body, the purging body being provided with air injection holes in which air is injected onto a surface facing the electrode pattern; and Multiple air holes are disposed in the purging body, communicating with the air injection holes, and arranged in a row along the width direction of the electrode film. The plurality of air holes are assigned to each segment of the electrode pattern according to their arrangement order in the width direction of the electrode film.

5. The foreign matter removal device for a secondary battery cut according to claim 4, characterized in that, The foreign object purging unit further includes: An air control unit adjusts the opening and closing of air vents, opening air vents that match the location information of the foreign object and closing air vents that do not match the location information of the foreign object.

6. The foreign matter removal device for a secondary battery cut according to claim 5, characterized in that, The plurality of air holes are configured for each section, and the air control unit adjusts the number of air holes opened for each section to regulate the flow rate of air sprayed onto the location of the foreign object.

7. The foreign matter removal device for a secondary battery cut according to claim 6, characterized in that, The plurality of air holes are provided with at least three for each section, and the air control unit adjusts the number of air holes opened to adjust the air flow intensity to strong / medium / weak.

8. The foreign matter removal device for a secondary battery cut according to claim 4, characterized in that, The air jet hole is an opening with an area larger than the electrode pattern.

9. The foreign matter removal device for a secondary battery cut according to claim 3, characterized in that, The foreign matter suction unit includes: The suction body includes a main suction port and multiple secondary suction ports. The main suction port is located on the surface facing the electrode pattern. The multiple secondary suction ports are disposed within the suction body, communicate with the main suction port, and are arranged in a row along the width direction of the electrode film. The plurality of auxiliary suction holes are assigned to each segment of the electrode pattern according to their arrangement order in the width direction of the electrode film.

10. The foreign matter removal device for a secondary battery cut according to claim 9, characterized in that, The foreign matter suction unit further includes: The vacuum pressure control unit adjusts the opening and closing of each auxiliary suction port, opening auxiliary suction ports that match the foreign object location information and closing auxiliary suction ports that do not match the foreign object location information.

11. The foreign matter removal device for a secondary battery cut according to claim 10, characterized in that, The plurality of auxiliary suction holes are configured for each section, and the vacuum pressure control unit adjusts the number of openings of the plurality of auxiliary suction holes allocated to each section to adjust the intensity of the vacuum pressure applied to the location of the foreign object.

12. The foreign matter removal device for a secondary battery cut according to claim 11, characterized in that, The plurality of auxiliary suction holes are provided with at least three for each section, and the vacuum pressure control unit adjusts the number of auxiliary suction holes opened to adjust the intensity of the vacuum pressure to strong / medium / weak.

13. The foreign matter removal device for a secondary battery cut according to claim 9, characterized in that, The main suction hole is an opening with an area larger than that of the electrode pattern.

Images