JP2009187982A - Edge cutting device for solar cell panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a defect such as a short circuit by cutting both edges of a solar cell panel. <P>SOLUTION: The edge cutting device for the solar cell panel comprises a table 11 which receives a solar cell panel blank A which has parallel separation grooves formed on an electrode film formed on an insulating substrate to electrically insulate photoelectric conversion areas from one another, and then has insulating separation grooves formed on a light absorption film formed on the electrode film and a transparent electrode film formed on the light absorbing film and also has the light absorbing film and transparent electrode film of an upper layer peeled and removed to expose both edges parallel to the separation grooves of the electrode film; a laser head 13 disposed above or below a separation groove end-side edge of the blank on the table and irradiating the electrode film with laser light to form the insulating separation grooves; and a needle 14 provided through an elevation means to form insulating separation grooves by scribing on lines along the formed insulating separation grooves of the light absorbing film and transparent electrode film by the laser head, wherein one of the table or the upper and lower laser head and needle are made to travel through a travel means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an edge cutting device for processing the edge of a solar cell panel.

In the solar cell panel, an electrode film is formed on an insulating substrate such as glass, and parallel separation grooves for electrically insulating each photoelectric conversion region are processed in the electrode film.
Next, a light absorption film such as molybdenum is formed on the electrode film.
An insulating separation groove is also formed in parallel with the light absorption film.
Further, a transparent electrode film such as zinc sulfide or indium sulfide is formed on the light absorption film, and an insulating separation groove is provided in parallel with the formed transparent electrode film (see, for example, Patent Documents 1, 2, 3, and 4). ).

As is well known, the light absorption film and the transparent electrode film are peeled off on both side edges of each of the processed insulating substrates to expose the electrode film.
JP 2000-124488 A JP 2001-320071 A Japanese Patent No. 3439179 Japanese Patent Laid-Open No. 8-242411

  By the way, according to the solar cell panels shown in Patent Documents 1, 2, 3, and 4, when each insulating separation groove is processed by laser irradiation, the debris of processing and the adjacent edge of each film due to thermal damage at the end of the insulating separation groove In addition, since conduction is caused by thermal welding of the edge of the scribe line, there is a problem that the resistance value is changed and causes defective products.

  Further, when the insulating separation groove is scribed by the needle, a problem occurs due to a short circuit due to an influence such as when the needle does not reach the groove end at the scribe end of the insulating separation groove or when a scribe residue is present.

  Therefore, the present invention is to solve the above-mentioned problems by cutting off the electrode film, the light absorption layer, and the transparent electrode layer on the side edge of the separation groove end of the solar cell panel.

  In order to solve the above-described problems, the present invention processes the separation grooves arranged in parallel for electrically insulating each photoelectric conversion region in an electrode film formed on an insulating substrate such as glass, and then A plurality of insulating separation grooves parallel to the separation grooves are processed on the light absorption film formed on the electrode film, and then the insulation separation parallel to the separation grooves is formed on the transparent electrode film formed on the light absorption film. After processing the groove, in the solar cell panel base plate from which the light absorption film and the transparent electrode film of the upper layer are peeled and removed so that both side edges parallel to the separation groove of the electrode film are exposed, the base plate is received. A laser head that is arranged on either the upper or lower side of the separation groove end side edge of the base plate on the table and irradiates the electrode film with a laser to form an insulating separation groove, and the light absorbing film / transparent electrode With the above laser head of the film It comprises a needle provided through an elevating means so as to form an insulating separation groove by scribing on a line along the formed insulating separation groove, and either one of the table or the upper and lower laser heads or the needle is driven by the traveling means in the direction of forming the separation groove A configuration that allows the vehicle to run is adopted.

  Then, the both sides of the separation groove of the electrode film of the solar cell panel are peeled and removed by the laser, and both ends of the separation groove of the light absorption layer and the transparent electrode layer are scribed with a needle, thereby causing inconvenience due to conduction (short circuit). Can be eliminated.

  As described above, according to the edge cutting device of the solar cell panel of the present invention, the solar cell panel base plate is received on the table, and one of the needles lowered by the table or the opposed laser head and the lifting / lowering means is traveled. The insulating separation groove is processed while separating the electrode film with a laser that irradiates the film-forming electrode film on the insulating substrate of the solar cell panel base plate from the laser head, and the laminated transparent film on the electrode film and The insulating separation groove can be processed while scribing with a needle on the line of the processed insulating separation groove of the electrode film in the light absorption film.

  For this reason, the solar cell panel has a disadvantage in that the resistance value changes due to conduction due to thermal damage or thermal welding at the end of the insulating separation groove processed for each electrode film, light absorption film and transparent electrode film. This can be eliminated by cutting the base plate.

Embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 4, the base plate A of the solar cell panel to be subjected to edge cutting according to the embodiment of the present invention has two electrode films 2 formed on an insulating substrate 1 such as glass. A plurality of parallel insulation separation grooves 3 are formed along the edge (this insulation separation groove 3 is processed while the electrode film 2 is separated by forming an image of an output irradiation laser passing through the separation groove width from the laser head. Then, after forming a light absorption film 4 such as molybdenum on the processed electrode film 2 of the insulating separation groove 3, a needle is formed on the line of each insulation separation groove 3 in the formed light absorption film 4. The parallel insulating separation grooves 5 are processed while scribing by the above method, and after that, a transparent electrode film 6 such as zinc sulfide or indium sulfide is formed on the processed light absorption film 4 of the insulating separation grooves 5, and then this formed transparent electrode The film 6 has a knee on the line of each insulating separation groove 5. The parallel insulating separation grooves 7 are processed while being scribed by the screw, and thereafter, a predetermined inner width is formed from the side of the insulating substrate 1 of the transparent electrode film 6 and the light absorbing film 4 outside the insulating separation grooves 7 on both sides. The electrode film 2 is exposed by cutting with a blade.

Next, the edge cutting process of the base plate A will be described with reference to FIGS.
First, the base plate A is placed on the table 11 and received.
The received base plate A is held on the table 11.

  As the above holding method, an infinite number of small holes 12 are provided on the top wall of the hollow table 11, and the inside of the table 11 is sucked and held.

  At this time, both edge portions of the base plate A are projected so as to protrude outward from the edge of the table 11 and are received.

  Further, a laser head 13 that irradiates the electrode film 2 with a laser having an output suitable for processing the insulating separation groove X on the lower side of the side protruding from the table 11 is opposed to the laser head 13 for insulation separation. A needle 14 that moves up and down by lifting means H for processing the insulating separation groove Y by scribing the light absorbing film 4 and the insulating electrode groove Z by scribing the transparent electrode film 6 is provided immediately above the groove X, and the table 11 Alternatively, either one of the laser head 13 and the needle 14 is moved forward and backward by the traveling means S.

  In the illustrated case, the traveling means S includes a male screw that reversibly rotates by operating the motor 18 while slidably engaging sliders 17 on both sides of the lower surface of the traveling carriage 16 on which the table 11 is mounted on two parallel rails 15. Although both ends of the bearing 19 are supported and the female screw 20 supported by the traveling carriage 16 is screwed into the male screw 19 so that the table 11 moves forward and backward, the invention is not limited to this. 13 and the needle 14 side may be moved forward and backward.

  In the illustrated case, the laser head 13 and the needle 14 are arranged on both sides of the traveling path of the table 11 so that both end edges of the base plate A are cut simultaneously. However, the laser head 13 and the needle are not limited. 14 is provided only on one side of the traveling path of the table 11, the table 11 is mounted on the traveling carriage 16 via the turning means E, and one end side of the base plate A and then the other end side thereof are edge-cut by rotating the table 11 180 degrees. You may make it do.

  Further, as shown in FIGS. 1 and 3, a male screw 35 that is slidably engaged with a rail 31 on both sides of a traveling path of the table 11 and slidably engages a slider 33 on the lower surface of the carriage 32 and reversibly driven by the operation of the motor 34. The female screw 36 supported on the carriage 32 is screwed in, the laser head 13 is installed on the carriage 32, and the lifting means H having the needle 14 is installed on the pillar 37 on the carriage 32, so that the left and right laser heads 13 and the needle 14 are installed. And the position can be adjusted.

  In the illustrated case, the lifting means H includes a vertical rail 51 provided on the pillar 37 on the carriage 32, a lift 53 having a slider 52 slidably engaged with the rail 51, and the lift 53 A ball screw 54 screwed from the upper end of the shaft and a motor 55 that reversibly drives the ball screw 54 by being supported on the pillar 37 side. The lift 53 has a shaft having the needle 14 in the holder 24 at the lower end via a support member 56. A material 57 is supported.

  If comprised as mentioned above, the shaft 55, the holder 24, and the needle 14 will fall with the raising / lowering body 53 by operating the motor 55 by numerical control, and driving the ball screw 54, and the scribe depth by the needle 14 will be determined. However, the present invention is not limited to the above-described configuration, and lifting means H that achieves the above-described object may be employed.

  And if the pressing force by the cylinder 58 is given to the upper end of the shaft material 57, the fine movement of the needle 14 at the time of a scribe is permitted, and the tracking of a scribe can be made smooth.

  When configured as described above, the transparent electrode film 6 and the light absorption film 4 are scribed at the end of the base plate A by the needle 14 to process the insulating separation grooves Z and Y, and insulation is performed by laser irradiation from the laser head 13. The separation groove X is processed.

As a result, resistance is changed due to conduction due to thermal damage or thermal welding at the ends of the insulating separation grooves 3, 5, 7 processed in the electrode film 2, the light absorption film 4 and the transparent electrode film 6. Such inconveniences can be eliminated by edge cutting.
In the above-described embodiment, the laser head 13 is disposed below the base plate A and the needle 14 is disposed above the base plate A. However, the present invention is not limited thereto, and the upper side of the base plate A as shown in FIG. Further, the needle 14 and the laser head 13 can be arranged in parallel (arranged in the traveling direction of the traveling means S).

The top view which shows embodiment of this invention. The partial notch side view same as the above. The same part notch front view. The perspective view of a base plate. The perspective view which cut off the same as the above. The side view which shows other arrangement | positioning of a needle and a laser head.

Explanation of symbols

A Substrate 1 Insulating substrate 2 Electrode film 3 Separation groove 4 Light absorption film 5 Separation groove 6 Transparent electrode film 7 Separation groove 11 Table 12 Small hole 13 Laser head 14 Needle S Traveling means 15 Rail 16 Traveling carriage 17 Slider 18 Motor 19 Male Screw 20 Female screw E Turning means H Lifting means 24 Holder 31 Rail 32 Carriage 33 Slider 34 Motor 35 Male screw 36 Female screw 37 Pillar 51 Rail 52 Slider 53 Lifting body 54 Ball screw 55 Motor 56 Support member 57 Shaft material 58 Cylinder X, Y , Z Separation groove

Claims (1)

  After processing parallel separation grooves to electrically insulate each photoelectric conversion region in the electrode film formed on an insulating substrate such as glass, the light absorption film formed on the electrode film is formed. After processing a plurality of insulation separation grooves parallel to the separation grooves, and then processing the insulation separation grooves parallel to the separation grooves on the transparent electrode film formed on the light absorption film, the separation grooves of the electrode film In the solar cell panel base plate from which the light absorbing film and the transparent electrode film in the upper layer are peeled and removed so that both side edges parallel to the surface are exposed, a table for receiving the base plate, and a separation groove end of the base plate on the table A laser head that is arranged on either the upper or lower side edge to irradiate the electrode film with a laser to form an insulating separation groove, and a line along the insulating separation groove formed by the laser head of the light absorbing film / transparent electrode film Insulation separation groove on A sun comprising a needle provided through an elevating means so as to be formed by a scribe, wherein either one of the table or the upper and lower laser heads or the needle is caused to travel in the separation groove forming direction by the traveling means. Battery panel trimming device.

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