JP6069818B2 - Capacitor manufacturing method and program - Google Patents

Description

The present invention relates to a technique for manufacturing a capacitor having a current collecting member such as a current collecting plate or a connecting plate between a capacitor element and an external terminal.

  In the electric double layer capacitor or the electrolytic capacitor, an external terminal is connected to the electrode portion of the capacitor element. The formation of the electrode part of the capacitor element and the concept of connection with the external terminal greatly affect the electrical characteristics of the capacitor, such as the capacitor element and the internal resistance of the capacitor as a product.

Regarding such connection, a current collecting terminal is provided on the end face of the element (for example, Patent Document 1), an anode current collecting plate is provided on one end face of the wound element, and a cathode current collecting plate is provided on the other end face (for example, 2), covering the current collector foil exposed on the end face of the winding element, including a current collector plate, and welding and connecting the current collector plate and the current collector foil (for example, Patent Literature 3), It is known that an electric plate is used for connection between an exterior case and an element or connection with an external terminal (for example, Patent Document 4).

Japanese Patent Laid-Open No. 11-21857 JP 2001-068379 A JP 2007-335156 A JP 2010-093178 A

  By the way, the current collector is provided between the capacitor element and the external terminal, and the current collector is connected to the electrode foil on the capacitor element side. Resistance can be reduced.

  The capacitor element is a polar element having electrodes on the anode side and the cathode side, and external terminals connected to the respective electrodes of the capacitor element are distinguished between the anode side and the cathode side. In the configuration in which the current collecting member described above is connected to the electrode portion of such a capacitor element, the common use of the current collecting member on the anode side and the cathode side, that is, the same shape, is different between the anode side and the cathode side. Compared to, it is beneficial in manufacturing.

  In such connection of the current collecting member and the connection of the external terminal to the current collecting member, polarity discrimination is indispensable, and the operation requires a lot of work. Although it is possible to visually discriminate the polarity, it is impossible to eliminate any discrimination mistakes, and it is difficult to realize a production amount that meets demand. If the polarity is incorrectly connected, a defective product is obtained. Such a problem is the same even if the shape of the current collecting member is different between the anode side and the cathode side.

  Regarding such demands and problems, Patent Documents 1 to 4 do not disclose or suggest them, and do not disclose or suggest a configuration for solving them.

  In view of the above problems, an object of the present invention is to automate the connection between the current collecting member and the element end face.

  Another object of the present invention is to automate the polarity discrimination between the current collecting member and the element end face in view of the above problems.

Another object of the present invention is to automate the determination of defective capacitor elements in view of the above problems.

In order to achieve the above object, the capacitor manufacturing method of the present invention is formed and formed by the end surface shape or end surface area of the electrode extension part derived from the element end face of the capacitor element or the electrode lead part derived from the element end face. The end face shape or the end face area of the electrode part is different between the anode side and the cathode side, and the current collector plate on the anode side or the cathode side is connected at the electrode extension part or the end face of the electrode part, and the electrode extension part or The anode side or the cathode side is specified by the end face shape or the end face area of the electrode portion, and the current collector plate is connected to an external terminal on the anode side or the cathode side.

In order to achieve the above object, in the method for manufacturing a capacitor, more preferably, the current collector plate has different shapes or areas on the anode side and the cathode side, and the anode side or the cathode depends on the shape or the area. The side may be specified and connected to the external terminal.

In addition, in order to achieve the above object, the capacitor manufacturing method of the present invention includes forming an anode-side or cathode-side electrode protruding portion having a different end face shape or end face area on the element end face of the capacitor element , or on the element end face. The electrode overhanging portion is formed to form an anode side or cathode side electrode portion having a different end surface shape or end surface area, and the end surface shape or end surface area of the electrode overhanging portion or the electrode portion is on the anode side as identification information. Determine whether it is the cathode side, and connect the external terminal on the anode side or the cathode side to the current collector plate that is connected to the electrode overhanging part or the electrode part and that identifies whether it is the anode side or the cathode side according to the identification information To do.

In order to achieve the above object, in the method for manufacturing a capacitor, more preferably, a reference line is set on the element end face by recognizing the electrode overhanging part or the electrode part, and parallel to the reference line. and sets the center line passing through the center of the capacitor element, and detects the center and displacement angle of the device end face relative to the center line of the capacitor element, the capacitor element by the correction information generated by the displacement angle The angular position may be corrected.

  In order to achieve the above object, in the method of manufacturing a capacitor, more preferably, the reference line may be set based on the electrode protruding portion or the edge of the electrode portion.

  In order to achieve the above object, in the method of manufacturing a capacitor, more preferably, a reference range having a certain width including the center line is set around the center line, and the electrode projecting portion or It may be determined whether or not the electrode portion protrudes.

  In order to achieve the above object, a capacitor manufacturing program according to the present invention is a capacitor manufacturing program executed by a computer, acquires image data of an element end face of a capacitor element, and outputs an electrode overhanging portion or the electrode overhanging portion. The end face shape or the end face area of the electrode part formed in the above is used as identification information to determine whether it is the anode side or the cathode side, and connected to the electrode extension part or the current collector plate connected to the electrode part Information identifying the external terminal on the anode side or the cathode side is generated.

In order to achieve the above object, in the capacitor manufacturing program, more preferably, a reference line is generated based on the position of the electrode overhanging part or the electrode part on the image data, and is parallel to the reference line and generates a center line passing through the center of the capacitor element, and detects the center and displacement angle of the device end face relative to the center line of the capacitor element, the correction information of the angular position of the capacitor element by the displacement angle It may be generated.

  In order to achieve the above object, in the capacitor manufacturing program, more preferably, the reference line may be generated based on recognition of an edge of the electrode overhang portion.

  In order to achieve the above object, in the capacitor manufacturing program, more preferably, a reference range having a certain width including the center line is set around the center line, and the electrode overhang portion or the reference range is set in the reference range. It may be determined whether or not the electrode portion is protruding, and the determination information may be generated.

According to capacitor manufacturing program or production method of the present invention, any of the following effects can be obtained.

  (1) Since the shape or area of the electrode overhang on the element end face of the capacitor element or the end face of the electrode formed by the electrode overhang on the anode side and the cathode side are different, the shape or area of the end face is changed. Polarity determination can be performed as identification information, and connection related to polarity can be performed quickly and with high accuracy.

  (2) Since the current collector plate connection and the external terminal connection are performed based on this polarity discrimination, erroneous connection of these polarities can be prevented, and the connection can be automated.

  (3) The accuracy of polarity discrimination can be improved, and the alignment of the capacitor element and current collector plate can be automated with high accuracy based on the reference line, center line and element center specified at the same time as polarity discrimination. it can.

  (4) It can be determined whether or not the electrode overhang protrudes from the reference range set on the element end face with respect to the center line, and defective capacitor elements can be eliminated and automated at the manufacturing stage. Speeding up and cost reduction can be achieved.

Other objects, features, and advantages of the present invention will become clearer with reference to the accompanying drawings and each embodiment.

It is a figure which shows the image showing the element end surface based on 1st Embodiment, and its process. It is a flowchart which shows an example of the manufacturing process of the capacitor | condenser which concerns on 2nd Embodiment. It is a figure which shows an example of a capacitor | condenser manufacturing system. It is a figure which shows an example of electrode foil and its process. It is a figure which shows an example of the element end surface in which the electrode overhang | projection part was formed. It is a figure which shows the process sequence of an electrode overhang | projection part. It is a perspective view which shows an example of the position adjustment of the capacitor | condenser element with respect to a current collecting plate. It is a perspective view which shows an example of a connection of an external terminal and a current collecting plate. It is a longitudinal cross-sectional view which shows an example of the manufactured capacitor | condenser. It is a figure which shows the winding deviation detection which concerns on 3rd Embodiment. It is a figure which shows an example of the electrode part defect detection which concerns on 4th Embodiment.

[First Embodiment]

  The first embodiment shows processing including polarity determination of the electrode overhang portion of the capacitor element.

  This processing procedure will be described with reference to FIG. FIG. 1 shows image data and its processing. The configuration illustrated in FIG. 1 is an example, and the present invention is not limited to such a configuration.

This processing procedure is one example of a capacitor manufacturing method or manufacturing program of the present invention. An image 2 shown in FIG. 1 is image data obtained by photographing the element end face 6 of the capacitor element 4. For ease of explanation, the image data, a display image generated from the image data (hereinafter simply referred to as “image”), and a real image thereof are denoted by common reference numerals.

  On the element end surface 6 displayed in the image 2, a pair of electrode projecting portions 8A and 8B are displayed with an insulation interval 10 interposed therebetween. In the actual capacitor element 4, a part of the anode-side and cathode-side electrode foils of the capacitor element 4 protrudes from the element end face 6 with different widths depending on the winding diameter, and the arc-shaped area and shape are different. Electrode overhang portions 8A and 8B are formed. Each electrode overhang | projection part 8A, 8B is an aggregate | assembly of the edge part of each electrode foil, Comprising: It is an electrode foil, ie, a metal body. The element end face 6 is covered with the edge of the separator set wider than the width in the center direction of the electrode foil in order to insulate between the electrode foils, and has a higher brightness than the electrode overhanging parts 8A and 8B. It is. For this reason, the electrode overhanging portions 8A and 8B have low brightness on the element end surface 6, and the other portions have high lightness. In the image 2 representing the element end surface 6, the shape of the element end surface 6 and the electrode overhanging portions 8A and 8B The area and shape are clearly displayed due to the difference in contrast. Further, if the color display is used, a color image with different brightness can be obtained in the image 2.

  In this image 2, electrode projecting portions 8A and 8B having different end face shapes and areas are displayed. The shape of the electrode overhanging portions 8A and 8B can be specified by a contour line that partitions the electrode overhanging portions 8A and 8B from the other portions by the brightness difference. Further, the area of the electrode overhanging portions 8A and 8B is a low-lightness portion in the contour line that partitions the electrode overhanging portions 8A and 8B and other portions by a lightness difference, and this portion constitutes the image 2, for example. It can be calculated using the distribution number of pixels (dot map).

  In this way, the electrode overhanging portions 8A and 8B can be determined from either one or both of the area and shape of the electrode overhanging portions 8A and 8B from the image 2. That is, it is possible to determine which polarity is set in the electrode extension portions 8A and 8B by determining the electrode extension portions 8A and 8B from either one or both of the area and the shape. In this embodiment, the area of the end face is used as the identification information of the electrode overhang portions 8A and 8B for this polarity discrimination, and this identification information is acquired from the image 2.

  Subsequent to the identification of the electrode overhanging portion 8A, the position of the reference line Lf is calculated by data processing on the image, the reference line Lf is generated at the calculated position, and the center line Lo is determined with reference to the reference line Lf. A position is calculated, and a center line Lo is generated at the calculated position. In this embodiment, the edge of the electrode extension 8A on the element center 12 side is recognized, and based on this recognition, a reference line Lf is generated on the image 2 as shown in FIG. Although the position of the reference line Lf is generated in the vicinity of the boundary between the electrode overhanging portion 8A and the insulation interval 10, it may be within the insulation interval 10.

  A center line Lo passing through the element center 12 is generated in parallel with the reference line Lf with reference to the reference line Lf. That is, the center line Lo passes through the element center 12 and is formed within the insulating interval 10. Further, an orthogonal line Lh that is orthogonal to the reference line Lf and the center line Lo and passes through the element center 12 may be calculated, generated, and displayed.

  Subsequent to the generation of the reference line Lf and the center line Lo, a deviation angle, that is, a displacement angle θ between the center line Lo and the actual alignment angle of the capacitor element 4 is calculated, and this angle θ is a correction of the angular position of the capacitor element 4. Information. Based on this correction information, that is, the angular position of the capacitor element 4 can be adjusted using the image processing acquired from the capacitor element 4 as a medium. Thereby, the adjustment of the angular position can be automated.

[Second Embodiment]

  The second embodiment shows a manufacturing process of a capacitor including an image representing an element end face and its processing (first embodiment).

  The manufacturing process of this capacitor will be described with reference to FIG. FIG. 2 shows an example of a capacitor manufacturing process.

The manufacturing process shown in FIG. 2 is an example of a manufacturing program, or a method of manufacturing capacitors of the present invention. In this manufacturing process, the capacitor element 4 is formed (step S11). In this forming process, the anode-side and cathode-side electrode foils are projected from the element end face 6 toward the element end face 6, and the electrode overhanging portion 8A is formed by each electrode foil. 8B are formed (FIGS. 4 and 5).

  The element end face 6 of the capacitor element 4 is photographed (step S12). The image 2 of the element end face 6 is acquired by the control unit 16 of the capacitor manufacturing system 14 (FIG. 3).

  The control unit 16 determines the polarity from the image 2 by using the areas of the end surfaces of the electrode overhanging portions 8A and 8B as identification information (step S13). In this polarity discrimination, the electrode overhanging portions 8A and 8B and their shapes (contour lines) are recognized from the contrast on the image 2 (FIG. 1) of the element end surface 6 of the capacitor element 4, and the area of the end surface surrounded by the contour line Is calculated. The areas of the electrode overhang portions 8A and the electrode overhang portions 8B are compared, and the polarity is determined from the comparison result of the areas (step S13). In this case, the case where the end face area is large is defined as the anode side, for example.

  After this polarity discrimination, a reference line Lf and a center line Lo are generated on the image 2 (step S14). Prior to the generation of the reference line Lf, the edge of the electrode overhanging portion 8A (the edge facing the electrode overhanging portion 8B) is recognized. The position of the reference line Lf is calculated based on this edge, and the reference line Lf is generated at that position. A center line Lo that passes through the element center 12 in parallel with the reference line Lf is generated.

  By generating the center line Lo, a deviation angle θ from the alignment angle of the capacitor element 4 is calculated (step S15). When the detected center line Lo of the element end surface 6 of the capacitor element 4 is determined, a deviation angle θ from the alignment angle of the capacitor element 4 connected to the current collector plates 18A and 18B can be calculated. This angle θ is output as correction information.

  By using this correction information, positioning is performed after correcting the position of the capacitor element 4 (step S16), and the electrode overhang portions 8A and 8B are formed (step S17). By forming the electrode overhang portions 8A and 8B, anode side and cathode side electrode portions 20A and 20B to be connected to the current collector plates 18A and 18B are formed.

  The quality of these electrode portions 20A and 20B is determined (step S18). This pass / fail judgment is a process for eliminating defective products such as a short circuit between the electrode portions 20A and 20B.

  The electrode portions 20A and 20B are positioned on the current collector plates 18A and 18B, and the two are connected by welding (step S19). Then, external terminals on the sealing plate 22 are connected to the current collecting plates 18A and 18B according to the polarity identified by the identification information described above (step S20). In this case, the anode terminal 24A is connected to the anode current collector 18A, and the cathode terminal 24B is connected to the cathode current collector 18B.

  In this way, after the capacitor element 4 and the sealing plate 22 are integrated, the capacitor 26 (FIG. 9) is assembled (step S20).

  According to such a configuration, the areas of the end surfaces of the electrode overhang portions 8A and 8B are identified from the image of the element end face 6 of the capacitor element 4 before being molded, and the polarity determination is performed using the end face area as identification information. Identification can be automated. Further, based on the reference line Lf and the center line Lo generated on the image of the element end face 6, by detecting the deviation angle θ of the capacitor element 4, it is possible to automate position correction using this as correction information.

  According to such a manufacturing process, the image 2 is acquired, the reference line Lf and the center line Lo, the calculation of the shift angle θ between the element angle and the alignment angle, and the manufacturing including the position adjustment of the capacitor element 4 based on the shift angle. This can contribute to the production of the capacitor 26 (FIG. 9) with high product accuracy, such as rapid production and polarity accuracy.

  Next, FIG. 3 is referred to regarding this capacitor manufacturing system. FIG. 3 shows an example of a capacitor manufacturing system.

  The capacitor manufacturing system 14 is an example of a capacitor manufacturing method and a manufacturing program, and executes control including acquisition of the image 2 of the element end surface 6 described above and processing (first embodiment). As shown in FIG. 3, the capacitor manufacturing system 14 includes the control unit 16, the imaging unit 28, the input unit 30, the display unit 32, and various drive mechanisms 34 described above.

  The control unit 16 is configured by a computer, and in this embodiment, includes a processor 36, a program storage unit 38, a data storage unit 39, and a RAM (Random-Access Memory) 40.

  The processor 36 is constituted by a CPU (Central Processing Unit), for example, and executes various programs such as an OS (Operating System) and a capacitor manufacturing program stored in the program storage unit 38. For execution of this program, an image is captured, information on the image is generated, a deviation angle is calculated, the position of the capacitor element 4 is corrected, control information is output, and drive outputs to various drive mechanisms 34 are generated. The program storage unit 38 and the data storage unit 39 are constituted by a recording medium such as a hard disk, and the program storage unit 38 stores the OS and the program described above. The data storage unit 39 stores image data and reference data. For example, the image data captured from the photographing unit 28, various data such as reference lines and center lines on the image generated by the control, and the angle θ are stored. To do. The RAM 40 is used as a work area for storing data in the middle of calculation and for executing the program described above.

  The imaging unit 28 is an example of an imaging unit, and is constituted by, for example, a digital still camera. The imaging unit 28 captures the element end face 6 of the capacitor element 4 and outputs image data to the control unit 16 under the control of the processor 36.

  For example, the input unit 30 includes an input device such as a keyboard, a touch panel, and a mouse.

  The display unit 32 is constituted by, for example, a liquid crystal display (LCD), and constitutes display means for the image 2 (FIG. 1) described above.

  The various drive mechanisms 34 described above include a winding machine (DLW) 42, an electrode overhanging portion forming portion 44, an element holding portion 46, an electrode forming portion 48, a current collector plate holding portion 50, a laser irradiation device 52, and the like. .

  The DLW 42 forms the capacitor element 4 by winding the anode-side electrode foil and the cathode-side electrode foil with the separator interposed therebetween. The electrode overhanging portion forming portion 44 is attached to the DLW 42, and forms the electrode overhanging portions 8A and 8B by shaping the edge portions of the wound anode side and cathode side electrode foils at predetermined intervals.

  The element holding part 46 holds the wound capacitor element 4, and the electrode forming part 48 is formed into electrode parts 20 A and 20 B by bending the electrode overhanging parts 8 A and 8 B on the element end face 6 of the capacitor element 4 to the element end face 6. To do.

  The current collecting plate holding unit 50 holds the current collecting plates 18A and 18B connected to the electrode portions 20A and 20B on the element end face 6 at predetermined positions. The element holding unit 46 holding the capacitor element 4 corrects the angular position based on the correction information described above.

  The laser irradiation device 52 welds the current collector plates 18A and 18B held by the current collector plate holding portion 50 and the electrode portions 20A and 20B of the capacitor element 4 by laser irradiation to make an electrical connection.

  Next, the formation of the capacitor element 4 and the electrode overhang portions 8A and 8B will be described with reference to FIG. FIG. 4 shows an electrode foil. In FIG. 4, the same parts as those in FIG.

  For the capacitor element 4, electrode foils 54A and 54B which are electrode bodies on the anode side and the cathode side shown in FIG. 4A are used. For each electrode foil 54A, 54B, for example, an aluminum foil is used as a base material. Each of the electrode foils 54A and 54B is a strip having the same width, and a polarizable electrode including an active material such as activated carbon and a binder is formed on both sides thereof. An uncoated portion 56 for forming the electrode overhang portions 8A and 8B is formed with a constant width on one edge portion of each electrode foil 54A and 54B. This uncoated part 56 is a non-formation part of a polarizable electrode.

  A crease 58 having a constant width is formed from the edge of the uncoated portion 56 of each electrode foil 54A, 54B. The fold line 58 is, for example, a marking line, and the fold line 58 prevents buckling during bending. The fold 58 may be a groove, and the cross-sectional shape may be triangular, square, or curved (R). For example, a method such as pressing, laser, or cutting may be used to form the fold 58. The number of folds 58 may be one as shown in FIG. 4A, but may be a plurality of folds according to the width of the unfinished part 56. The formation surface portion of the crease 58 may be one surface of the uncoated portion 56, or may be both surfaces. The fold line 58 as an example is formed so that the surface of the element end face 6 that faces the element center 12 (the winding center in the case of a winding element, FIG. 1) is a valley fold.

  In the uncoated portion 56 of the electrode foil 54A, as shown in FIG. 4B, a plurality of electrode protruding portions 8A having different widths Wa in the longitudinal direction of the electrode foil 54A are formed. Similarly, as shown in FIG. 4C, a plurality of electrode protruding portions 8B having different widths Wb in the longitudinal direction of the electrode foil 54B are formed in the uncoated portion 56 of the electrode foil 54B.

  In the wound element such as the capacitor element 4, the formation position is set so that the electrode protruding portions 8A and 8B face the element center 12 in the diameter direction with the insulating interval 10 interposed therebetween, and the width Wa and width Wb is set to a width that linearly increases with an increase in the orbiting radius. Further, the electrode overhanging portions 8A and 8B have different end faces and are set to areas capable of determining the polarity. Each area is set such that the width Wb of the electrode overhanging portion on the electrode overhanging portion 8B side is set smaller than the width Wa of the electrode overhanging portion 8A. Therefore, as shown between B and C in FIG. 4, the interval widths Wd and Wc are made different.

  With such a configuration, as shown in FIG. 5, the electrode overhanging portions 8A and 8B are formed on the element end surface 6 of the capacitor element 4 every half circumference, and the electrode overhanging portions 8A and 8B having different end surface areas are formed. And the insulating interval 10 is the same between one edge surface, and the other can be continuously expanded in the outer peripheral direction of the capacitor element 4. Further, the electrode overhanging portions 8A and 8B can be bent toward the element center 12 side by the fold line 58.

  Next, FIG. 6 will be referred to regarding the electrode overhanging portion and its forming. FIG. 6 schematically shows the element end face and each electrode projection shown in FIG.

By applying a molding pressure F1 from the periphery of the capacitor element 4 toward the element center 12 in the direction of the center axis (Y axis) in the vertical direction in the drawing of the electrode extension parts 8A and 8B, the electrode extension parts 8A and 8B are bent, Mold flat. This molding range is defined as partition portions 8Aa and 8Ba, and the angle of each partition portion 8Aa and 8Ba is defined as θ ₁ . θ ₁ is, for example, 40 [°].

  After this forming, if the total angle of the electrode overhanging portion 8A is, for example, 180 [°], the angle θ2 of the remaining partitioning portions 8Ab, 8Ac is θ2 = {(180−θ1) / 2}. This θ2 is, for example, 70 [°]. By applying a molding pressure F2 from the periphery of the capacitor element 4 toward the element center 12 with respect to the partition parts 8Ab and 8Ac, the partition parts 8Ab and 8Ac are bent and formed flat.

Further, if the entire angle of the electrode overhanging portion 8B is 180 [°] −θx = 170 [°] as an example, the angle θ2 of the remaining partitioning portion 8Bb is set to θ as in the partitioning portion 8Ab on the electrode overhanging portion 8A side. ₂ = {(180−θ ₁ ) / 2}. That is, θ ₂ is 70 [°]. If the angle θ ₃ = {170−θ ₂ −40} of the partition portion 8Bc, the area of the electrode overhang portion 8B is reduced by a smaller amount. In this case, the angle θ ₃ as an example is 60 [°].

  By applying molding pressures F2 and F3 from the peripheral edge of the capacitor element 4 toward the element center 12 with respect to the partition parts 8Bb and 8Bc, the partition parts 8Bb and 8Bc are bent and formed flat.

  The partition portions 8Aa and 8Ba have a molding pressure F1 in the opposite direction on the same line, the partition portions 8Ab and 8Bb have a molding pressure F2 in the opposite direction on the same line, the partition portion 8Ac has a molding pressure F2, and the partition portion 8Bc has a molding pressure F2. Since the molding pressure F3 is applied, as shown in FIG. 7, electrode portions 20A and 20B that form a balanced and flat molding surface can be formed on the element end surface 6 of the capacitor element 4.

  Next, FIG. 7 will be referred to for the positioning and connection of the electrode part and the current collector plate. FIG. 7 shows the holding of the current collector plate and the positioning of the current collector plate.

  As shown in FIG. 7, the current collector plates 18 </ b> A and 18 </ b> B have the same shape, and are formed in a substantially semicircular shape that bisects the element end surface 6 with the insulating interval 10 interposed therebetween. Each of the current collector plates 18A and 18B is formed with a terminal connecting portion 60 projecting upward in the figure, and element connecting portions 62 are formed on the back surfaces of both sides of the terminal connecting portion 60. By setting the insulation interval 64 between the opposing portions of the current collector plates 18A and 18B in the same manner as the insulation interval 10 described above, each of the current collector plates 18A and 18B becomes a chucking portion 66A of the current collector plate holding portion 50, 66B is positioned at a predetermined position.

  On the other hand, the capacitor element 4 is held on the holding table 68 of the element holding unit 46. In this configuration, the element center 12 of the capacitor element 4 and the holding center axes of the current collector plates 18A and 18B are aligned with each other, and the angular position of the capacitor element 4 is adjusted.

  Therefore, as described in the first embodiment, the reference line Lf and the center line Lo are obtained by the control unit 16 from the image 2 obtained by photographing the element end face 6 of the capacitor element 4, and a preset current collector is obtained. The deviation angle θ is obtained between the alignment angles of the plates 18A and 18B. By rotating the holding table 68 of the element holding unit 46 using the deviation angle θ as correction information, the center line of the capacitor element 4 is made to coincide with the alignment angle position Lθ (FIG. 1), that is, the angle difference is corrected. To complete the position setting.

  The current collector plate 18A and the electrode portion 20A thus positioned are connected by laser welding, and the current collector plate 18B and the electrode portion 20B are connected by laser welding. In the laser welding, laser irradiation is performed from the upper surface of the element connecting portion 62 of the current collector plates 18A and 18B, and welding is performed by a welding line 70 (FIG. 8) extending radially from the element center 12 side toward the periphery of the capacitor element 4.

  Next, FIG. 8 will be referred to regarding the connection between the current collector plates 18A and 18B and the external terminals. FIG. 8 shows a sealing plate and a capacitor element.

  As shown in FIG. 8, current collector plates 18A and 18B are connected to the element end face 6 of the capacitor element 4 by welding as described above. The above-described laser welding or electron beam welding is used for connection, the electrode connecting portion 62A of the capacitor element 4 is connected to the element connecting portion 62 of the current collecting plate 18A, and the element connecting portion 62 of the current collecting plate 18B. The electrode portion 20B on the cathode side of the capacitor element 4 is connected to. In the capacitor element 4 to which the current collector plates 18A and 18B are connected in this way, the shape of the current collector plates 18A and 18B is made common, so that the polarity is visually recognized from above the current collector plates 18A and 18B. It is difficult. For this reason, by the image recognition of the electrode overhanging portions 8A and 8B of the capacitor element 4, the identification information indicating the polarity of the electrode overhanging portions 8A and 8B depending on the area of the end face is used for connection to the external terminal. That is, the identification information recognized at the connection stage with the capacitor element 4 may be used as the polarity of the current collector plates 18A and 18B in the capacitor element 4 installed on the holding table 68 of the element holding unit 46.

  On the other hand, the external terminals on the sealing plate 22 are differentiated into an anode terminal 24A and a cathode terminal 24B and are individualized. Therefore, the anode terminal 24A needs to be connected to the anode side electrode foil 54A, that is, the electrode overhanging portion 8A side, and the cathode terminal 24B needs to be connected to the cathode side electrode foil 54B, that is, the electrode overhanging portion 8B side.

  Since the current collecting plate 18A in the positioned capacitor element 4 is on the anode side and the current collecting plate 18B is on the cathode side, the anode terminal 24A and cathode terminal 24B on the sealing plate 22 are connected to these current collecting plates 18A and 18B. Positioned. The laser of the laser irradiation device 52 is between the welding surface 74 formed on the side surface of the terminal connection portion 60 of the current collector plates 18A and 18B and the welding surface 76 formed on the side wall of the anode terminal 24A or the cathode terminal 24B. Weld by irradiation. As a result, the anode terminal 24A or the cathode terminal 24B and the capacitor element 4 are integrated into a single component, and a configuration in which the polarity on the capacitor element 4 side matches the polarity on the sealing plate 70 side is realized. The

  Thus, by using the identification information for determining the polarity obtained using the image 2 of the element end face 6, the visual polarity until the connection with the anode terminal 24A and the cathode terminal 24B on the sealing plate 22 is reached. It is automated using the identification information described above without requiring discrimination. Thereby, the polarity setting with high reliability without misidentification is realized.

  In the sealing plate 22 of this embodiment, the anode terminal 24A and the cathode terminal 24B are fixed by insert molding of the main body portion 78 made of a hard resin plate. A sealing portion 80 made of an airtight elastic material such as rubber is installed on the upper edge of the sealing plate 22. Although not shown, the anode terminal 24A and the cathode terminal 24B are distinguished from the anode side and the cathode side by the shape and the signs.

  Next, referring to FIG. 9, the assembly of the capacitor and the capacitor will be described. FIG. 9 shows an example of a capacitor.

  The capacitor 26 shown in FIG. 9 uses a bottomed cylindrical outer case 82 made of a metal material such as aluminum. The sealing plate 22 is inserted into the outer case 82 together with the capacitor element 4, and the sealing plate 22 is fixed to the stepped portion 84 of the outer case 82 that has been drawn. The opening end portion 86 of the outer case 82 is cut into the sealing portion 80 by a curling process, and the outer case 82 is sealed. The holding tape 88 processed at the end of winding of the capacitor element 4 is wound around the periphery of the capacitor element 4.

[Third Embodiment]

  The third embodiment is a capacitor element winding deviation detection process.

  This winding deviation detection will be described with reference to FIG. FIG. 10 shows an example of the winding deviation detection process of the capacitor element.

  In this embodiment, the image 2 acquired in the first embodiment is used. Corresponding to the shape regions (detection regions) of the end surfaces of the electrode protrusions 8A and 8B on the element end surface 6 displayed in the image 2, reference regions 90A and 90B are generated. The reference areas 90A and 90B may be stored in advance in the data storage unit 39 and read out from the data storage unit 39 for use. The reference regions 90A and 90B may be contour data representing a shape or area data.

  The detection areas detected from the end faces of the electrode overhang portions 8A and 8B on the acquired image 2 are compared with the reference areas 90A and 90B, and the detection areas of the end faces of the electrode overhang portions 8A and 8B are within the reference areas 90A and 90B. It is determined whether or not. If it deviates from the inside of the reference regions 90A and 90B, it is found that the capacitor element 4 is unwound and is defective.

  With such a configuration, defective products can be extracted at the stage of the electrode overhanging portions 8A and 8B before the molding process, and the reliability of the product can be improved.

[Fourth Embodiment]

  The fourth embodiment is a defect detection process of the electrode portion of the capacitor element.

  Refer to FIG. 11 for the detection of defects in the electrode portions 20A and 20B. FIG. 11 shows an example of defect detection of the electrode part.

  In this embodiment, the defect detection after the forming process of the electrode overhang portions 8A and 8B is performed. When the electrode overhanging portions 8A and 8B are formed, the electrode overhanging portions 8A and 8B may contact each other depending on the forming.

  Therefore, the element end face 6 of the capacitor element 4 formed on the electrode portions 20A and 20B is photographed, and reference lines 92A and 92B having a constant width Wf are generated at the insulation interval 10 on the element end face 6 as shown in FIG. To do. The reference lines 92A and 92B may be generated on the basis of the center line Lo calculated in the first embodiment, or parallel lines having a constant width Wf including the element center 12 as a reference and the element center 12 as a reference. May be generated.

  It is determined whether or not the electrode overhanging portions 8A and 8B protrude within the width Wf of the reference lines 92A and 92B. That is, the electrode overhanging portions 8A and 8B protrude within the width Wf of the reference lines 92A and 92B due to the contrast between the high lightness portion made of the separator and the low lightness portions of the electrode overhanging portions 8A and 8B made of metal color. It can be detected whether or not. If one or both of the electrode overhanging portions 8A and 8B are present within the width Wf as determined by such detection, the electrode overhanging portions 8A and 8B are regarded as being defectively folded and the capacitor element 4 is regarded as a defective product from the production line. It can be eliminated. Thereby, the reliability of a product can be improved.

[Other Embodiments]

  (1) Although the winding element is used for the capacitor element 4 in the above embodiment, the present invention is not limited to this. A laminated element may be used.

  (2) In the above embodiment, the polarity determination is performed based on the end face shape or the end face area of the electrode protrusions 8A and 8B derived from the capacitor element 4, but the present invention is not limited to this. The polarity determination may be performed based on the end face shape or the end face area of the electrode portions 20A and 20B, which are formed surfaces formed by applying the forming pressure to the electrode overhang portions 8A and 8B derived from the capacitor element 4. Further, without forming the electrode portions 20A and 20B which are the molding surfaces formed by applying the molding pressure to the electrode projection portions 8A and 8B derived from the capacitor element 4, the current collector plates are directly formed on the electrode projection portions 8A and 8B. 18A and 18B may be connected.

  (3) In the above embodiment, the collector plates 18A and 18B having the same shape are used on the anode side and the cathode side. However, the shape or area is different between the anode side and the cathode side, and depending on the shape or the area, The anode side or the cathode side may be specified and connected to an external terminal.

As described above, the most preferable embodiment and the like of the present invention have been described. However, the present invention is not limited to the above description, and is described in the claims or a form for carrying out the invention. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist of the invention disclosed in the above, and such modifications and changes are included in the scope of the present invention.

Capacitor manufacturing method and program of the present invention, the polarity discrimination and angle correction using an image of the device end face, automatically detect such defective elements, perform calculation and judgment, it has realized the automation of production, beneficial is there.

2 Image 4 Capacitor element 6 Element end face 8A, 8B Electrode overhanging part 10 Insulation interval Lf Reference line Lo Center line θ Displacement angle 12 Element center 16 Control part 18A, 18B Current collector plate 20A, 20B Electrode part 22 Sealing plate 24A Anode terminal 24B Cathode terminal 26 Capacitor 28 Imaging unit 32 Display unit 34 Various drive mechanisms 36 Processor 38 Program storage unit 40 RAM
42 Winding machine 44 Electrode overhang formation part 46 Element holding part 48 Electrode forming part 50 Current collector holding part 52 Laser irradiation device 54A, 54B Electrode foil 60 Terminal connection part 62 Element connection part 64 Insulation interval

Claims (10)

The end face shape or end face area of the electrode extension part derived from the element end face of the capacitor element, or the end face shape or end face area of the electrode part formed by the electrode lead-out part derived from the element end face is determined on the anode side and the cathode side. Different from the
A current collector plate on the anode side or cathode side is connected at the electrode overhanging portion or the end face of the electrode portion,
The anode side or the cathode side is specified by the end face shape or the end face area of the electrode projecting part or the electrode part, and the current collector plate is connected to the anode side or the cathode side external terminal.
A method for manufacturing a capacitor.   The current collector plate has different shapes or areas on an anode side and a cathode side, the anode side or the cathode side is specified by the shape or the area, and is connected to the external terminal. 2. A method for producing a capacitor as described in 1. The anode-side or cathode-side electrode overhang portion having a different end surface shape or end surface area is formed on the element end surface of the capacitor element , or the electrode overhang portion formed on the element end surface is formed to form the anode side or the end surface area having a different end surface shape or end surface area Forming the electrode part on the cathode side,
Determine whether it is the anode side or the cathode side as identification information on the electrode overhang part or the end face shape or end face area of the electrode part,
An external terminal on the anode side or the cathode side is connected to the current collector plate that is connected to the electrode overhanging part or the electrode part, and that specifies the anode side or the cathode side according to the identification information,
A method of manufacturing a capacitor. Further, by recognizing the electrode overhang portion or the electrode portion, a reference line is set on the element end face,
Set a center line parallel to the reference line and passing through the center of the capacitor element ;
Detecting the displacement angle of the element end face with reference to the center of the capacitor element and the center line;
Correcting the angular position of the capacitor element according to the correction information generated by the displacement angle;
The method for manufacturing a capacitor according to claim 3, wherein: Setting the reference line based on the electrode overhang or the edge of the electrode;
The method for manufacturing a capacitor according to claim 4, wherein: A reference range having a constant width that includes the center line around the center line is set, and it is determined whether or not the electrode projecting portion or the electrode portion protrudes from the reference range.
The method for producing a capacitor according to claim 4, wherein the capacitor is produced. A capacitor manufacturing program executed by a computer,
Acquires image data of the element end face of the capacitor element, and determines whether it is the anode side or the cathode side using the end face shape or end face area of the electrode extension part or the electrode part formed by the electrode extension part as identification information ,
A program for producing a capacitor, characterized in that information specifying an anode-side or cathode-side external terminal connected to the electrode overhanging portion or a current collector plate connected to the electrode portion is generated. A reference line is generated based on the position of the electrode overhanging part or the electrode part on the image data,
Generating a center line parallel to the reference line and passing through the center of the capacitor element ;
Detecting the displacement angle of the element end face with reference to the center of the capacitor element and the center line;
The capacitor manufacturing program according to claim 7, wherein correction information on the angular position of the capacitor element is generated based on the displacement angle. Generating the reference line based on the recognition of the edge of the electrode overhang;
The capacitor manufacturing program according to claim 8 , wherein: A reference range having a certain width including the center line is set around the center line, and it is determined whether or not the electrode projecting portion or the electrode portion protrudes from the reference range, and the determination information is generated. ,
The manufacturing program for a capacitor according to claim 8 or 9, wherein

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