CN112670546A - Secondary battery manufacturing apparatus having multi-machine vision inspection function - Google Patents
Secondary battery manufacturing apparatus having multi-machine vision inspection function Download PDFInfo
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- CN112670546A CN112670546A CN201911038900.4A CN201911038900A CN112670546A CN 112670546 A CN112670546 A CN 112670546A CN 201911038900 A CN201911038900 A CN 201911038900A CN 112670546 A CN112670546 A CN 112670546A
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- 238000007689 inspection Methods 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 230000007547 defect Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 17
- 238000011179 visual inspection Methods 0.000 claims description 12
- 239000000284 extract Substances 0.000 claims description 3
- 238000004148 unit process Methods 0.000 claims 1
- 230000002950 deficient Effects 0.000 abstract description 8
- 230000000712 assembly Effects 0.000 abstract description 5
- 238000000429 assembly Methods 0.000 abstract description 5
- 230000009257 reactivity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 238000000926 separation method Methods 0.000 description 10
- 239000012528 membrane Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000010405 anode material Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacturing & Machinery (AREA)
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- Electrochemistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The present invention relates to a secondary battery manufacturing apparatus having a multi-machine vision inspection function, including: a stacking plate reciprocating between a first position for loading the anode plate to be conveyed and a second position for loading the cathode plate to be conveyed; an anode plate loading position inspection unit for acquiring an image of a region including the anode plate on the lower side of the first position; a cathode plate loading position inspection portion that acquires an image of a region including the cathode plate on a lower side at an upper side of the second position; and an image processing unit for analyzing the electrode plate loading images obtained from the anode plate loading position inspecting unit and the cathode plate loading position inspecting unit to determine an error in the loading position. The device can adjust the inspection area corresponding to the size of the polar plate, thereby improving the reactivity to the change of the polar plate size. In addition, in the stacking plate, a position error is accurately measured every time the electrode plates are loaded, thereby minimizing the occurrence of defective electrode assemblies.
Description
Technical Field
The present invention relates to a multi-cell secondary battery laminating apparatus, and more particularly, to a secondary battery manufacturing apparatus having a multi-cell vision inspection function capable of performing a vision inspection even if the size of a pole plate is changed.
Background
In general, a secondary battery is a battery that can be repeatedly used through a discharge process for converting chemical energy into electric energy and a reverse charge process, and its kinds include a nickel-cadmium (Ni-Cd) battery, a nickel-metal hydride (Ni-MH) battery, a lithium metal battery, a lithium Ion (Ni-Ion) battery, a polymer lithium Ion battery, and the like.
The secondary battery is composed of an anode, a cathode, an electrolyte, and a separation membrane, and stores and generates electricity using a voltage difference between anode and cathode materials different from each other. Here, the discharge is to move electrons from a cathode having a high voltage to an anode having a low voltage (to generate electricity according to a voltage difference between the anodes), and the charge is to move electrons from the anode to the cathode again, and at this time, the anode material receives the electrons and lithium ions and returns to the original metal oxide. That is, the secondary battery generates a charge current as metal atoms pass through the separation membrane and move from the anode to the cathode when charged, and conversely, generates a discharge current as metal atoms move from the cathode to the anode when discharged.
On the other hand, such a secondary battery may be manufactured in a winding manner and a stacking manner in which anode plates and cathode plates cut to a predetermined size are alternately stacked to manufacture an electrode assembly. It is disclosed in korean patent No. 1421847 (published: 2012.05.31).
However, such a prior art has a problem in that even if the size of the electrode plate is changed due to a change in the manufacturing machine type, the production efficiency is lowered due to the same laminating operation.
Prior art documents
Patent document
Korean granted patent No. 1421847 (published Japanese: 2012.05.31)
Disclosure of Invention
An object of the present invention is to provide a secondary battery manufacturing apparatus having a multi-machine vision inspection function, which can solve the problems of the conventional secondary battery manufacturing apparatus and can easily perform a vision inspection even if a machine type is changed.
Provided is a secondary battery manufacturing apparatus, including: a stacking plate reciprocating between a first position for loading the anode plate being conveyed and a second position for loading the cathode plate being conveyed; an anode plate loading position inspection unit for acquiring an image of a region including the anode plate on the lower side of the first position; a cathode plate loading position inspection portion that acquires an image of a region including the cathode plate on a lower side at an upper side of the second position; and an image processing unit for analyzing the electrode plate loading images obtained by the anode plate loading position inspecting unit and the cathode plate loading position inspecting unit to determine an error in the loading position.
On the other hand, the image processing unit can set a position of the stacked plate in the acquired plate loading image as a reference point, and determine a loading position error of the anode plate or the cathode plate loaded on the stacked plate.
On the other hand, the stacked plate further includes a reference part (reference part) that is recognizable by the anode plate loading position inspecting part and the cathode plate loading position inspecting part, and the image processing part is capable of extracting a center coordinate of the reference part in the plate loading image and setting the center coordinate of the reference part as the reference point.
In another aspect, the method may further comprise: a display part for displaying the polar plate loading image; and a control part for controlling the stacking plate, the anode plate loading position inspecting part, the cathode plate loading position inspecting part, the image processing part and the display part.
In addition, the image processing unit can process the image so as to fuse and display the electrode plate loading image and the loading position error.
On the other hand, when the loading position error exceeds the predetermined range, the control section can display it on the display section.
Further, the control part may be capable of suspending the loading operation of the plate when the loading position error exceeds a predetermined range.
In addition, the control part can pause the plate loading operation after completing the stacking operation of the secondary batteries in the current stack when the loading position error exceeds the predetermined range.
In another aspect, the method may further comprise: a first visual inspection part for inspecting the appearance and position of the anode plate loaded on the first plate alignment part before the anode plate is conveyed to the first position; and a second visual inspection part for inspecting the appearance and position of the anode plate loaded on the second plate alignment part before the cathode plate is transferred to the second position.
In addition, the first vision inspection portion and the second vision inspection portion may include: a first alignment camera and a second alignment camera for acquiring images including edges of the anode plate or the cathode plate; and the defect detection camera can confirm the defects of the polar lugs and polar plates of the anode plate or the cathode plate through images.
On the other hand, the first and second vision inspection portions may further include camera position adjustment portions, respectively, which can adjust photographing positions of the first and second alignment cameras.
Further, the camera position adjustment section may include: an x-axis camera position adjusting part for adjusting the position of the second alignment camera along the x-axis direction; and a y-axis camera position adjusting section that adjusts positions of the first alignment camera, the second alignment camera, and the defect detection camera along a y-axis direction.
On the other hand, when the sizes of the anode plate and the cathode plate are changed, the positions of the x-axis camera position adjusting part and the y-axis camera position adjusting part are driven corresponding to the sizes thereof, thereby adjusting the photographing positions.
On the other hand, the first alignment camera and the second alignment camera shoot vertically downward, and the defect detection camera can shoot at a predetermined angle from the vertically downward direction.
The present invention relates to a secondary battery manufacturing apparatus having a multi-machine vision inspection function, which can adjust an inspection region according to the size of a plate, and thus can improve the reactivity to the change in the size of the plate. In addition, in the stacking plate, a position error is accurately measured every time the electrode plates are loaded, thereby minimizing the occurrence of defective electrode assemblies.
Drawings
Fig. 1 is a diagram illustrating the concept of secondary battery stacking.
Fig. 2 is a perspective view illustrating electrode assemblies formed in different sizes according to different models.
Fig. 3 is a perspective view of a visual inspection apparatus according to another embodiment of the present invention.
Fig. 4 is a perspective view of the vision inspection unit module.
Fig. 5 is an operation state diagram of the vision inspection portion module.
Fig. 6 is a diagram showing the concept of adjusting the examination region.
Fig. 7 is a conceptual diagram illustrating a concept of the loading position inspecting section.
Fig. 8 is a plan view showing the stacked plate and the stacked electrodes.
Fig. 9 is a diagram showing an imaging area of the loading position inspection unit.
Fig. 10 is a conceptual diagram of processing an image acquired from the loading position inspection unit.
Reference numerals
1000: electrode assembly
2000: polar plate
3000: anode plate
4000: negative plate
5000: separation membrane
500: vision inspection device
510: a first vision inspection part
511: first alignment camera
512: second alignment camera
513: defect detection camera
514: x-axis camera position adjusting part
515: y-axis camera position adjusting part
520: second vision inspection part
700: loading position inspection unit
710: examination region
720: reference part
Detailed Description
Hereinafter, a secondary battery manufacturing apparatus having a multi-machine vision inspection function according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description of the embodiments, the names of the respective components may be named by other names in the technical field. When there are functional similarities and similarities, even if the modified embodiments are adopted, they may be regarded as equivalent configurations. In addition, reference numerals attached to the respective constituent elements are described for convenience of description. The illustration in the drawings in which these reference numerals are described does not limit the respective components to the scope within the drawings. Similarly, even if the components on the drawings are adopted by the partially modified embodiments, when there is functional similarity and identity, they are regarded as equivalent components. In addition, when it is considered that the constituent elements should be included in view of the level of those skilled in the art, the description thereof will be omitted.
Fig. 1 is a drawing illustrating the concept of secondary battery stacking. As shown, the electrode assembly 1000 (or jellyroll) is produced by stacking plates 2000 bounded by a separation membrane 5000, formed by having anode plate 3000 on one side and cathode plate 4000 on the other side. For example, the secondary battery electrode plate stacking apparatus can produce an electrode assembly having several tens to several hundreds of layers by repeating the operation of placing the anode plate 3000 and covering the separation membrane 5000, and then placing the cathode plate 4000 and covering the separation membrane 5000.
Fig. 2 is a perspective view illustrating an electrode assembly 1000 formed in different sizes according to different models. The present invention is capable of producing a variety of models of electrode assemblies 1000 as shown in fig. 2. Each model may be formed so that the size, particularly the area in the plane direction, of the plate 2000 is different. The secondary battery stacking apparatus of the present invention corresponds to the size of the electrode plate 2000 according to the model change of the electrode assembly, and thus can maximize the production efficiency.
On the other hand, although not shown, the secondary battery laminating apparatus may include an electrode plate taking and placing device, a vision inspection device, a stacking plate, a loading position inspection unit, and a separation film supply device independent of a transport path of the electrode plate, based on the order of transporting the electrode plate, and may further include a tension and edge position control device of the separation film.
The vision inspection apparatus 500 of the present invention will be described in detail below with reference to fig. 3 to 6.
Fig. 3 is a perspective view of a visual inspection apparatus 500 as another embodiment according to the present invention. As shown in the drawing, the visual inspection apparatus 500 inspects whether there is a defect before transferring the electrode plate 2000 to the stack plate, and helps it to discharge the defective electrode plate 2000 through another moving path when the defect exists. In addition, the position where the plate 2000 is mounted is detected, and when the alignment position or posture is required, the alignment thereof is assisted. The vision inspection apparatus 500 may include a first vision inspection part 510 inspecting the received anode plate 2000; and a second visual inspection part 520 inspecting the received cathode plate 2000. The second vision inspection unit 520 is formed symmetrically to the first vision inspection unit 510, and may include the same components 521, 522, 523, 524, and 525, and thus a description thereof will be omitted and only the first vision inspection unit 510 will be described in detail. As shown in the drawing, the first visual inspection part 510 is formed such that a pole plate 2000 (an anode plate 3000 or a cathode plate 4000) is mounted on the upper surface of the alignment device 400, and the mounted pole plate 2000 is viewed from the upper side to the lower side direction and is visually inspected.
Fig. 4 is a perspective view of the vision inspection unit module. As shown, the first vision inspection portion 510 module may include: a first alignment camera 511, a second alignment camera 512, a defect detection camera 513, an x-axis camera position adjustment section 514, a y-axis camera position adjustment section 515, and an image analysis section (not shown).
The first alignment camera 511 can photograph toward the vertically lower side and can photograph a partial edge among the edges of the pad 2000 to grasp the current position of the pad 2000.
The second alignment camera 512 can photograph the image toward the vertical lower direction similarly to the first alignment camera 511, and can photograph the edge parallel to the edge photographed by the first alignment camera 511. That is, the first and second alignment cameras 511 and 512 can simultaneously perform photographing from positions on the same straight line that are spaced apart by the length of the plate 2000.
The defect detection camera 513 can photograph the upper surface of the plate 2000 to determine whether there is a defect. The defect detection camera 513 can photograph an area including the entire electrode plate 2000, and also has an angle of view that can confirm a TAB (TAB) formed on one side of the electrode plate 2000 in an image.
The defect detection camera 513 is located between the first and second alignment cameras 511 and 512, and may be disposed at a position spaced apart from a virtual line connecting the first and second alignment cameras 511 and 512 by a predetermined distance. This is to avoid interference due to the defect detection camera 513 when the first alignment camera 511 and the second alignment camera 512 are brought into close contact when the small-sized plate 2000 is photographed in accordance with the size of the plate 2000, which will be described later. The defect detection camera 513 can photograph the entire surface of the plate 2000 with a slight angle from the vertical downward direction.
When the model of the plate 2000 is changed and the length of the plate 2000 is changed, the x-axis camera position adjusting unit 514 can change the edge capture position in accordance with the change. The x-axis camera position adjustment section 514 can move the second alignment camera 512 in the x-axis direction. The x-axis camera position adjusting part 514 may include a linear guide for moving in the x-axis direction and a driving part, but this is a structure that is generally widely used, and thus a detailed description thereof is omitted.
When the model of the plate 2000 is changed and the width of the plate 2000 is changed, the y-axis camera position adjusting unit 515 can change the edge capture position in accordance with the change. When the width of the plate 2000 is changed, the first and second alignment cameras 511 and 512 and the defect detection camera 513 can be simultaneously moved in the y-axis direction. The y-axis camera position adjustment section 515 may include a linear guide and a driving section for moving in the y-axis direction, but this is a structure that is generally widely used, and thus a detailed description thereof is omitted.
Further, although not shown, an image processing unit may be provided so as to be able to analyze images acquired from the first alignment camera 511, the second alignment camera 512, and the defect detection camera 513. The image processing unit can determine whether or not there is a defect or calculate a position error from the acquired image, and can provide a reference value for the operation of the robot or the operation of the alignment device 400. In addition, since the image acquired from the defect detection camera 513 is a product of photographing at an angle from the electrode plate 2000, the image processing part is formed to be able to modify the distortion thus generated.
Fig. 5 is an operation state diagram of the vision inspection portion module. As shown in fig. 5 (a), when only the length of the inspection target plate 2000 is increased, the x-axis camera position adjustment unit is driven to control the position so that the second alignment camera 512 moves in the x-axis direction, thereby enabling the edge to be imaged. As shown in fig. 5 (b), when the width of the plate 2000 is increased, the positions in the width direction of the first alignment camera 511, the second alignment camera 512, and the defect detection camera 513 are controlled, that is, after moving in the y-axis direction, images can be obtained from the central portion.
Fig. 6 is a diagram showing the concept of adjusting the examination region. In the present drawing, in order to help understand the concept of position adjustment, the concept of symmetrically adjusting the inspection positions of the anode plate 2000 and the cathode plate 2000 is shown. In the present figure, there are the first visual inspection portion 510 and the second visual inspection portion 520 which respectively inspect the anode plate 2000 and the cathode plate 2000, but are symmetrical to each other, and therefore only one of the visual inspection portions will be described. As shown in (a) of fig. 6, when the size of the pad 2000 is large, a first photographing region t1 photographed by the first alignment camera 511 and a second photographing region t2 photographed by the second alignment camera 512 are illustrated. As shown in fig. 6 (b), when the size of the pad 2000 is slightly reduced, the x-direction position of the first alignment camera 511 module disposed adjacent to the axis of symmetry does not change, but the second alignment camera 512 module is moved and disposed toward the x-direction of the first alignment camera 511 module side. Then, both side edges of the plate 2000 are photographed. Also, as shown in (c) of fig. 6, when the plate 2000 is determined to be the smallest size, the interval between the first and second alignment camera 511 and 512 modules is narrowed so as to photograph both side edges of the respective plates 2000. On the other hand, although not shown, when it is necessary to adjust the imaging position in the y direction, the y-axis camera position adjustment unit 515 may be driven as described above, so that the overall y-axis imaging position can be adjusted.
The loading position inspecting section 700 will be described in detail below with reference to fig. 7 to 8.
In order to inspect whether or not the secondary battery module 1000 is good, the secondary battery module manufactured in a stacked manner is put into another inspection unit, not shown, and finally inspected. However, if a defective battery pack continues to be generated due to a positional error in the stacking process, for example, a positional error of the alignment device 400, a problem arises in that a defective product continues to be produced during a period from when the defective battery pack is first identified by a user to when the operation of the apparatus is stopped. The loading position inspecting part 700 of the present invention can solve such a problem, and immediately confirm the position of the electrode plate loaded on the stack plate 600 every time the electrode plates are stacked.
Fig. 7 is a conceptual diagram illustrating the concept of the loading position inspecting part 700. As shown in the drawing, the loading position inspection units 700 are formed as a pair, and the position of the loaded electrode plate can be confirmed on the upper side of the stacked plate 600.
Hereinafter, for convenience of explanation, the operation of any one of the loading position inspecting units 700 will be described. On the other hand, the other loading position checking section 700 can be operated in the same manner. The loading position inspecting unit 700 can operate in conjunction with the display unit, the image processing unit, and the control unit.
Fig. 8 is a plan view showing the stacked plate 600 and the stacked electrodes. On the other hand, in the present embodiment, since the loading position inspecting part 700 can be formed symmetrically as described above, an inspection with the anode plate 3000 as a reference will be described as an example.
The loading position inspecting unit 700 can acquire an image of a region including the separation membrane 5000 and the anode plate 3000, and extract the relative position of the electrode plate with reference to the stacked plate 600 in an image processing unit (not shown) to determine the degree of the position error.
Fig. 9 is a diagram illustrating an imaging area of the loading position inspecting unit 700, and fig. 10 is a conceptual diagram of processing an image acquired from the loading position inspecting unit 700.
As shown in the figure, when the stacked plate 600 is viewed from the upper side, an image of a region including a partial structure of the stacked plate 600, the separation membrane 5000, and the anode plate 3000 can be acquired in the acquired image.
The image processing unit extracts a position where the anode plate 3000 should be arranged by selecting any one of the mechanical structures of the stack plate 600 that can be confirmed in the image shown in fig. 9 as the reference unit 720 and extracting the position, and calculates an error from the current position. Wherein the center coordinates of the reference part 720 are set as a reference point, and thus the current position is extracted. That is, the position error of the loaded electrode plate can be determined relative to the mechanical elements of the stacked plate 600. With this configuration, even when the size of the electrode plate is changed and the reciprocating position of the stack plate 600 is changed, the reference point can be extracted from the image and the position of the electrode plate can be relatively grasped. However, although the reference portion 720 is provided as a partial groove formed in the holder of the stack plate 600, any one of structures that can be confirmed in the image may be selected.
The control unit can perform a function of fusing the image acquired from the loading position inspecting unit 700 and extracting and displaying the result values of the reference point and the position error. The control unit can issue a command to the image processing unit to extract data from the image. In addition, when the extracted data, that is, the position error of the pad is out of a predetermined range, the control part can be displayed on the display part so as to inform the user.
In addition, the control section can immediately interrupt the operation of the secondary battery cell stacking apparatus to take measures against the production of additional defective products. In this case, the control unit may determine the operation stop time with reference to one electrode plate assembly 1000, and may determine the operation stop time with reference to one electrode plate.
On the other hand, when the user determines that the position error is one-shot, the user can check the error and restart the entire system, thereby stacking the secondary batteries.
The present invention relates to a secondary battery manufacturing apparatus having a multi-machine vision inspection function, which can adjust an inspection region according to the size of a plate, and thus can improve the reactivity to the change in the size of the plate. In addition, in the stacking plate, a position error can be correctly measured every time the electrode plate is loaded, and thus the occurrence of defective electrode assemblies can be minimized.
Claims (14)
1. A secondary battery manufacturing apparatus, characterized by comprising:
a stacking plate reciprocating between a first position for loading the anode plate being conveyed and a second position for loading the cathode plate being conveyed;
an anode plate loading position inspection unit that obtains an image of a region including the anode plate on a lower side of the first position;
a cathode plate loading position inspection portion that takes an image of an area including the cathode plate on a lower side at an upper side of the second position; and
and an image processing unit for analyzing the electrode plate loading images obtained from the anode plate loading position inspecting unit and the cathode plate loading position inspecting unit to determine a loading position error.
2. The secondary battery manufacturing apparatus according to claim 1,
the image processing section sets a position of the stacked plate in the acquired plate loading image as a reference point to determine the loading position error of the anode plate or the cathode plate loaded on the stacked plate.
3. The secondary battery manufacturing apparatus according to claim 2,
the stacked plate further includes a reference portion that is identifiable by the anode plate loading position inspection portion and the cathode plate loading position inspection portion,
the image processing unit extracts the center coordinates of the reference portion from the plate loading image, and sets the center coordinates of the reference portion as the reference point.
4. The secondary battery manufacturing apparatus according to claim 2, characterized by further comprising:
a display part for displaying the polar plate loading image; and
a control part for controlling the stacking plate, the anode plate loading position inspecting part, the cathode plate loading position inspecting part, the image processing part and the display part.
5. The secondary battery manufacturing apparatus according to claim 4,
the image processing unit processes the image so as to fuse and display the electrode plate loading image and the loading position error.
6. The secondary battery manufacturing apparatus according to claim 5,
when the loading position error exceeds a predetermined range, the control unit causes the display unit to display the loading position error.
7. The secondary battery manufacturing apparatus according to claim 6,
the control part suspends the loading operation of the plate when the loading position error exceeds a predetermined range.
8. The secondary battery manufacturing apparatus according to claim 6,
when the loading position error exceeds a predetermined range, the control portion suspends the plate loading operation after completing the stacking operation of the secondary battery in the current stack.
9. The secondary battery manufacturing apparatus according to claim 1, characterized by further comprising:
a first visual inspection part for inspecting the appearance and position of the anode plate loaded on the first plate alignment part before the anode plate is conveyed to the first position; and
a second visual inspection part for inspecting the appearance and position of the anode plate loaded on the second plate alignment part before the cathode plate is transferred to the second position.
10. The secondary battery manufacturing apparatus according to claim 9,
the first vision inspection unit and the second vision inspection unit each include:
a first alignment camera and a second alignment camera for acquiring images including edges of the anode plate or the cathode plate;
and the defect detection camera confirms the defects of the lugs and the polar plates of the anode plate or the cathode plate through images.
11. The secondary battery manufacturing apparatus according to claim 10,
the first vision inspection part and the second vision inspection part respectively further comprise a camera position adjusting part,
the camera position adjustment section adjusts shooting positions of the first and second alignment cameras.
12. The secondary battery manufacturing apparatus according to claim 11,
the camera position adjustment section includes:
an x-axis camera position adjusting part that adjusts a position of the second alignment camera along an x-axis direction; and
a y-axis camera position adjustment section that adjusts positions of the first alignment camera, the second alignment camera, and the defect detection camera along a y-axis direction.
13. The secondary battery manufacturing apparatus according to claim 12,
when the sizes of the anode plate and the cathode plate are changed, the positions of the x-axis camera position adjusting part and the y-axis camera position adjusting part are driven corresponding to the sizes, so that the shooting position is adjusted.
14. The secondary battery manufacturing apparatus according to claim 13,
the first and second alignment cameras shoot towards vertically below,
the defect detection camera takes a picture at a predetermined angle from vertically below.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190128617A KR102259235B1 (en) | 2019-10-16 | 2019-10-16 | multi-type secondary battery stacking device having vision inspection |
| KR10-2019-0128617 | 2019-10-16 |
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| CN112670546A true CN112670546A (en) | 2021-04-16 |
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| CN201911038900.4A Pending CN112670546A (en) | 2019-10-16 | 2019-10-29 | Secondary battery manufacturing apparatus having multi-machine vision inspection function |
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|---|---|---|---|---|
| KR20230059584A (en) * | 2021-10-26 | 2023-05-03 | 주식회사 엘지에너지솔루션 | Manufacturing method of electrode assembly |
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| KR20210045181A (en) | 2021-04-26 |
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