JP2005285829A - Method and device for pressing tab lead in soldering of solar cell and tab lead - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel method and device for pressing a tab lead in the soldering of a solar cell and the tab lead. <P>SOLUTION: In the soldering of a solar cell and a tab lead, rear end side of each tab lead pressing member 10 for pressing each tab lead on the forward end side thereof is supported by a supporting part provided on the outside of the thermal irradiation range of a thermal heater unit such that it can oscillate freely through a resilient body. The tab lead is pressed against the cell face while copying each cell face with each pressing member such that it can oscillate individually. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for pressing and holding individual tab leads against each cell in soldering tab leads for connecting a plurality of solar cells (hereinafter also referred to simply as “cells”) side by side. About.

  Conventionally, a plurality of solar cells are arranged in a line, and adjacent cells are electrically connected with tab leads to form a string. In this process, tab leads are soldered to each solar cell. The method of connecting by attaching is adopted.

  Generally, the connection between the solar cell and the tab lead by soldering is performed by pre-depositing solder on the surface of the solar cell for soldering, and with the tab lead side soldered, the lead is placed on the cell surface. In many cases, a form is employed in which heating is performed to weld the solder while pressing the tab lead against the cell surface.

In the soldering process of the above embodiment, for example, Patent Literature 1 discloses a tab lead pressing method in which a plurality of thin rigid presser bars are used in order to press and hold the tab lead against the solar cell surface. Has been. However, this pressing technique may cause the following problems.
That is,
1) In a cell in which solder has been dip (deposited) in advance, solder balls are often left on the cell surface by the dip process. However, as shown in FIG. In the method in which a thin rigid rod is integrated and the tab lead is pressed against the cell, a constant load is applied to the entire cell, so if there is a solder ball on the cell surface, a concentrated load is applied to that part and the cell is broken. There is. If the pressing force is reduced to avoid such cell cracking, the thin rod for pressing the tab lead against the cell surface may not contact the tab lead sufficiently, and the tab lead pressing function necessary for soldering cannot be obtained. There is a problem.
2) Solar cells have a structure in which aluminum, silver, etc. are deposited on a silicon substrate by thermal processing, while the thickness of the cells has been further reduced for the purpose of reducing the cost of raw materials for silicon. In many cases, a thin plate cell is thermally strained. When a tab lead pressing method that integrally presses a plurality of thin rigid rods as described above against a cell having such a distortion is highly likely to break the cell.
3) In addition, when heating for soldering the solar battery cell as described above, the cell is curved (warped) during heating soldering due to the difference in thermal expansion coefficient of the material forming the inside of the cell. In the above method, there is also a problem that the cell is broken during the solder heating.
4) Further, in the above method, since the mounting member that supports the thin rod body is disposed so as to face the side surface of the cell, the cell width (left-right width in the feed direction) is different (for example, larger). ) And the interference between the attachment member and the cell, and therefore, the narrow cell and the wide cell cannot be combined with the thin rod body supported by the attachment member installed at the same position. In this case, it is necessary to replace the thin rod body for each mounting member in order to arrange the thin rod body in accordance with the cell width. If this replacement is attempted, the entire soldering device is stopped for the replacement. This is an impediment to productivity improvement.
And other problems.

On the other hand, a tab lead pressing member is arranged in the direction along the conveying direction of the solar battery cell and the tab lead, and this member is moved in synchronization with the conveyance of the cell and the tab lead by the belt so that the pressing force is applied to the tab lead by the spring force. For example, there is a technique disclosed in Patent Document 2, but this technique has the following problems.
That is,
1) Since the spring and the presser bar are arranged within the heat irradiation range of the lamp heater, the spring and the presser bar shield the heat rays (infrared rays) of the heater and the hot air of the hot wire heater, and heating is insufficient. May occur, resulting in poor soldering (no soldering).
2) In addition, if heating is strengthened to compensate for the poor soldering of the radiation shielding part, the part that is not shielded by the presser bar will be overheated, and the cell may be broken, or There is a risk of causing a large cell curvature.
3) Since the spring is within the irradiation range of the heater, the spring is likely to deteriorate due to repeated heating. Therefore, parts are frequently replaced, and not only the cost of parts consumption is increased, but also the replacement of the spring. Therefore, the entire soldering apparatus must be stopped, which is an impediment to productivity improvement.
4) When the size of the solar cell to be soldered changes, the arrangement interval of the tab leads also changes accordingly. To change the interval of the members holding the tab leads, two sets attached to the presser bar It is necessary to change the mounting position of the pressing members and springs, or to replace each pair of pressing members and springs for each presser bar. Takes a lot of time, which is a major impediment to improving productivity.
5) The pressing members are subject to repeated heating and are therefore likely to deteriorate. For this reason, replacement is necessary. However, it is necessary to recombine all the pressing members of each presser bar for all presser bars. The replacement work takes a lot of time.
6) When changing the presser interval (pitch) and the number of attachments for each tab lead according to the type of solar cell or tab lead, it is necessary to change the pitch for each of the many presser bars provided on the belt. The replacement work takes a lot of time, and this is an impediment to productivity improvement.
And other problems.
Japanese Patent Laid-Open No. 11-87756 JP 2000-22188 A

  Therefore, in the present invention, in order to solve the problems in the conventional soldering technology as described above for solar cells and tab leads, in the soldering of solar cells and tab leads, a new method of tab lead pressing method and therefore It is an object of the present invention to provide an apparatus.

  The structure of the tab lead pressing method of the present invention made for the purpose of solving the above problems is to heat a row of solar cells in which the tab leads are arranged in a polymerized state by a heater unit arranged upward along the row. In the soldering of solar cells and tab leads for soldering and connecting each cell and tab lead, the rear end side of each tab lead pressing member that presses each tab lead at the front end side is outside the heating irradiation range of the heater unit. By pressing the tab lead against the cell surface in such a manner that each of the pressing members can individually swing with respect to each cell surface by supporting the provided support portion so as to be swingable via an elastic body. It is characterized by.

  In the method of the present invention, the pivot shaft of each tab lead pressing member is provided parallel to the length direction of the heater unit and outside the heating irradiation range of the heater unit, so that only the tip end side of the tab lead pressing member is heated. It was positioned within the irradiation range so that most of the components of the tab lead pressing device were not exposed to the heat of irradiation.

  On the other hand, the configuration of the tab lead pressing device of the present invention in the solar cell soldering apparatus made to adopt the above-described method of the present invention to solve the above problems is as follows. In a solar cell soldering apparatus for connecting a solar battery cell and a tab lead by heating, a fulcrum shaft attached outside the heating irradiation range of the heater unit arranged along the row of the cells, and a fulcrum shaft A plurality of tab lead pressing members that are mounted in a swingable manner at appropriate intervals in parallel and whose tips can be brought into contact with respective tab lead positions on each cell, and outside the heating irradiation range of the heater unit An elastic force acting body, such as a spring, which is provided and connected to each tab lead pressing member, and applies an elastic force in the pressing direction of the tab lead to the pressing member. It is characterized in that Bei was.

  In the tab lead pressing device of the present invention, a lamp heater unit or a hot air heater unit can be provided as the heater unit arranged along the row of cells. In the device of the present invention, it is preferable to use a tab lead pressing member provided with a pressing member made of a spring metal material on the tip side. Further, the tab lead pressing member may have a configuration in which a pressing member mounting groove or hole is provided at the distal end of the rigid member, and the mounting pressing member is fixed by a fixing member from the side surface of the groove or hole.

In the present invention, in the soldering of the solar battery cell and the tab lead, the rear end side of each tab lead pressing member that presses each tab lead at the front end side is provided on the support portion provided outside the heating irradiation range of the heater unit. Since each tab lead pressing member is made to follow each cell surface so as to be swingable individually, the tab lead pressing device has only the tip portion of the tab lead pressing member. Is positioned in the heating irradiation region, and the generation of consumable parts of the apparatus due to heat can be remarkably suppressed. Further, since only a few members obstruct heating irradiation, there is no soldering failure due to heating failure.
Furthermore, if solder balls are attached to the cell, if the cell is distorted before soldering, or if the cell is bent during soldering, it will not cause damage such as cell cracking. The tab lead can be properly held and soldered.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of the main part of an example of the tab lead pressing device of the present invention, FIG. 2 is a side view of the main part of another example of the tab lead pressing device of the present invention, and FIG. 3 is a bottom view of the main part of the device of FIG. 4 is an enlarged view of the end surface of the device of FIG. 1 as viewed from the arrow AA, FIG. 5 is a front sectional view of an example of the device of the present invention in which the entire device is formed as a lifting type, and FIG. FIG. 7 is a front sectional view of an example of the device of the present invention formed to have a variable width corresponding to the feed direction). FIG. 7 is an example of the device of the present invention using a hot air heater instead of a lamp in the device of the present invention of FIG. FIG. 8 is a front sectional view for explaining another example (second example) of the tab lead pressing member in the apparatus of the present invention shown in FIG. 4, and FIG. 9 is a third view of the tab lead pressing member used in the apparatus of the present invention. FIG. 10 is a plan view of FIG. 9, and FIG. 11 is a front view of a fourth example of a tab lead pressing member. FIG. 12 is a plan view of FIG. 11, FIG. 13 is a partial side view of an example of a solar cell and a tab lead in a soldering process, and FIG. 14 is a plan view of FIG.

  First, as illustrated in FIGS. 13 and 14, the solar cells are formed in a string (string) by connecting the cells (C1, C2, C3) with tab leads TL in the solar cell manufacturing process. Is done. The connection is soldered by placing a tab lead TL pre-plated with solder in a superposed state on the cell and heating the connection. In general, the wiring tab leads TL of the solar cells C1,... Are configured in two rows for one cell.

  1 to 5, 1 is a heating lamp unit mainly composed of a lamp housing, 2 is an infrared lamp provided as a heating source in the lamp housing of the unit, and 3 is on the lower surface side (irradiation surface side) of the lamp 2. It is a protective window made of an infrared transparent material provided. The infrared light emitted from the infrared lamp 2 is reflected downward by the reflecting surface 1r on the inner surface of the lamp unit 1 and passes through the protective window 3 so that the tab lead TL is polymerized. The installed cell C is irradiated, and the cell C and the tab lead TL are soldered by the infrared heating. Here, the infrared rays irradiated from the lamp unit 1 can be appropriately selected from parallel light, diffused light, and condensed light depending on the shape of the reflecting surface 1r.

Outside the heating irradiation range of the lamp unit 1, two flanges 4a and 4b positioned in front of and behind the lamp unit 1 in the feeding direction of the cell C and a bar 4c constructed between the flanges 4a and 4b are integrally formed. An attachment base 4 is formed as an attachment base for a tab lead pressing member described later.
Between the front and rear flanges 4a and 4b of the mounting base 4, a spring shaft 5 for mounting a spring of the pressing member, which will be described later, a fulcrum shaft 6 serving as an operating fulcrum of the pressing member, and a stopper shaft for regulating the operation 7 is installed and installed.
A plurality of tab lead pressing members 10 (hereinafter, abbreviated as tab pressing members 10) are inserted into the fulcrum shaft 6 so as to be swingable, with the spacers 8 being interposed between the fulcrum shafts. . A collar-shaped end spacer 9 is inserted at both ends of the fulcrum shaft 6 to restrict the displacement of the pressing member 10 in the cell row conveyance direction.

One end of a spring 11 as an example of an elastic body is connected to each spring locking hole 10a of each tab pressing member 10, and the other end of each spring 11 is connected to a spring shaft 5. The compression force of the spring 11 acts between the shaft 5 and the spring locking hole 10a of each tab pressing member 10, so that the tab lead pressing force with the fulcrum shaft 6 as a fulcrum is provided on the tip side of each tab pressing member 10. Has come to work. The tab lead pressing force of the pressing member 10 may be obtained by an elastic body other than the spring material, such as a rubber material, in addition to the spring 11 of the above example.
Each tab pressing member 10 has a form in which a tab lead pressing portion 10b (hereinafter referred to as a tab pressing portion 10b) at the tip thereof protrudes substantially at the center of the protective window 3 in the lamp unit 1, and the tab lead TL on the cell C is located. It is formed so as to contact only the vicinity.
Further, the tip of each tab pressing member 10 is formed in a thin plate shape or wire shape when viewed from above (plan view), and is formed so as to minimize shielding of heating irradiation from above. The stopper shaft 7 is a member for restricting the swinging amount of the tab pressing member 10 toward the cell pressing side.

  Here, the tab lead pressing portions 10b respectively formed at the tips of the swingable tab pressing members 10 are individually moved downward (tab leads by the respective springs 11 provided outside the heating irradiation range of the lamp unit 1). (Pressing direction) Since each cell C is formed so as to be able to float in a direction that resists spring force while being preloaded, each cell lead C is brought into contact with only the respective tab lead TL and elastic force is applied to the individual tab lead TL. It can be pressed through.

With the above-described configuration of the tab lead pressing member 10 and its arrangement configuration, it is possible to bring the entire area of the tab lead TL into contact with the cell surface without damaging the cell even when solder balls due to solder dip remain on the cell surface. is there.
Further, the swingable tab pressing member 10 is configured to be in contact with only the tab lead TL disposed in the cell C, and the pressing force is different depending on each spring force acting on each tab pressing member 10. Even when the cell is distorted or when the cell is curved during heating, the contact portion of the tab pressing portion 10b follows the distortion or curvature of the cell, and the warped cell is fixed with a certain pressing force. Therefore, the entire area of the tab lead TL can be pressed and brought into contact with the cell surface without damaging the cell.

In the present invention, it is possible to easily change the pitch of the tab pressing member 10 and the number of tab pressing members 10 attached according to the cell size and the like. In this case, the pitch and the number of attachments can be easily changed by exchanging each attachment base 4.
Even when one type of mounting base 4 is used, the pitch can be changed by replacing the spacer 8 with a different length, and the end spacer 9 can be replaced and the number of tab pressing members 10 used can be increased or decreased. Thus, it is possible to easily cope with a change in the number of attached tab pressing members 10.

FIG. 5 is a cross-sectional view of an example in which two sets of heater heater units are provided in the tab lead pressing device of the present invention in order to correspond to a tab lead two-row type cell that is a general solar battery cell.
In FIG. 5, two sets of lamp units 1A and 1B provided with two sets of tab lead pressing devices facing each other are integrally attached to the cylinder 12 via a connecting base 12a, thereby providing 2 The pair of lamp units 1A and 1B are integrally formed so as to be movable in the vertical direction.

  In order to solder-connect the tab lead TL to the solar cell C, the solar cell C on which the tab lead TL is superimposed is placed on a conveying means such as a conveyor (not shown), and this conveying means is in a direction perpendicular to the paper surface of FIG. After the index feed in the right and left direction, the two sets of tab pressing members 10 are brought into contact with and pressed against the tab leads TL of the cell C by the operation of the cylinder 12, and then the left and right lamps 2 and 2 are irradiated to perform solder connection. By repeating the intermittent conveyance of the cell C with the tab leads stacked thereon and the intermittent raising and lowering operations of the lamp units 1A and 1B, it is possible to form solar cells (strings) wired in a row.

  The solder connection of the tab lead TL in FIG. 5 exemplifies a solder connection mode only on the upper surface of the cell by one heating. However, in the present invention, the heating condition of the heater is adjusted and set once. It is possible to solder both the upper and lower surfaces by heating. That is, as an example, the lower surface of the cell can be soldered by the internal transfer of irradiation heat from the upper surface of the cell. Furthermore, it is desirable to use preheating of the entire cell in combination by a heating means such as a plate heater disposed below the cell without interfering with the conveying means. In addition, as an example of the double-sided soldering, the heating means such as the lamp unit 1 provided with the tab lead pressing device for the lower surface of the cell is arranged without interfering with the conveying means, and the heating condition is appropriately set, so that the cell There is also a form in which the upper and lower surfaces of C are connected by soldering.

Further, the mounting posture of the lamp units 1A and 1B is not limited to the vertical posture illustrated in FIG. 5, but the positional relationship with the tab conveying means (not shown) (for example, the tabs above the solder irradiation section). From the case of providing a space for the suction conveyance device, etc.), it may be installed at an angle of an appropriate angle (direction and position with an angle from the vertical).
In addition, for the purpose of preventing cell breakage due to heating of solder connection and improving tact time, the cell C may be preheated before soldering by a technique such as embedding a heater in the cell transfer means.

FIG. 6 is a cross-sectional view showing an example in which the facing distance between the lamp units 1A and 1B having the tab pressing member 10 can be freely changed in the device of the present invention.
In FIG. 6, the configurations of the lamp units 1A and 1B and the tab lead presser device disposed outside the heat irradiation range of these units 1A and 1B are the same as those in the example of FIG. The following configuration is provided for the change function.
That is, the cylinder 12 is provided with a linear guide rail 14c having two sets of sliders 14a and 14b on the lower surface side through the base 13, and the lower surface of each slider 14a and 14b has a bearing inside. Heater supports 15a and 15b having nuts are provided, and the sliders 14a and 14b are connected to the lamp units 1A and 1B.

Screw rods of right-handed screw 17 and left-handed screw 16 provided in a symmetrical relationship with bearing coupling 18 attached to bracket 20 located at the center of the lower surface of base 13 are screwed into bearing nuts of heater supports 15a and 15b. Has been.
The right screw 17 and the left screw 16 of the screw rod are connected and integrated by the coupling 18 having a concave groove formed on the outer surface thereof, and are attached to the bracket 20 attached to the base 13 in a suspended posture. Since the concave groove is rotatably fitted and supported, the coupling 18 cannot move in the axial direction of the screw rod.

  Here, when the lever 19 attached to the right screw 17 (left side in FIG. 6) is rotated, the right screw 17 and the left screw 16 rotate in the same direction, so that the sliders 14a and 14b are moved to the linear motion guide rail 14c. The heater supports 15a and 15b, to which the left and right lamp units 1A and 1B are respectively attached, are coupled to each other through the screw 16 and 17 so that the bearing nuts inside thereof are coupled to each other. It can move in both directions of expansion and contraction in the width direction around 18.

With the above configuration, when it is desired to change the interval between the tab leads TL in accordance with the size of the solar battery cell C, the lamp units 1A and 1B and the lamp units 1A and 1B can be simply operated by simply rotating the lever 19. The distance between the left and right tab lead pressing devices integrated with each other can be changed at the same time, and the position of the pressing portion 10b at the tip of the tab pressing member 10 and the irradiation position of the left and right heating lamps 2 and 2 can be variously changed. The tab lead TL disposed on the cell C having a width can be set to a position to be pressed and soldered.
Here, the feed screw portion for adjusting the interval may be provided with an appropriate screw locking mechanism, an indicator for measuring or detecting the adjustment amount, or a stopper that can accommodate the size of the tab lead TL interval. desirable.

FIG. 7 is a partial sectional view showing another example of the heater unit in the apparatus of the present invention shown in FIG.
In the example of FIG. 7, hot air heaters 21A and 21B are used as the heaters instead of the lamp units 1A and 1B. In the heater unit using the hot air heaters 21A and 21B, the hot air heaters 21A and 21B are supported by the heater supports 15a and 15b via the brackets 22a and 22b, and the plates 23a and 23b are provided on the back side of the heaters 21A and 21B. The mounting base 4 provided with the tab pressing member 10 is provided on the plates 23a and 23b.

  The hot air heaters 21A and 21B are attached to the heater supports 15a and 15b via brackets 22a and 22b, respectively, and the tab lead pressing devices are provided to the brackets 22a and 22b via plates 23a and 23b, respectively. Therefore, the tab pressing member 10 is attached so that only the pressing portion 10b at the tip thereof is positioned almost directly below the hot air heaters 21A and 21B and is in contact with only the tab lead TL disposed on the cell C.

  Since the tab lead pressing device and the gap adjusting mechanism of the hot air heater units 21A and 21B integrated with the tab lead pressing device are the same as those in the apparatus shown in FIG. 6 described above, the tab lead TL interval can be easily adjusted according to the size of the cell C. In addition, since the tab pressing member 10 contacts only the arranged tab lead, each tab pressing member 10 that can be individually preloaded and swingable can press the entire area of the tab lead against the cell surface to be brought into contact therewith. Is formed.

FIG. 8 is a partial sectional view showing another configuration example of the tab lead pressing member 10 according to the present invention.
The tab pressing member 10 in the example of FIG. 8 is pivotally supported by the fulcrum shaft 6 so as to be individually swingable, and is provided on the distal end side of each tab pressing member 10 by a large number of springs 11 provided outside the heating irradiation range of the lamp unit 1. In the plurality of tab pressing members 10 to which the pressing force acts, the main body of the pressing member 10 is formed in a short shape, and the opposite side (front) of the end (rear part) to which the spring 11 is connected to the main body The tab presser that comes into contact with the tab lead TL on the cell C in a state of being pre-pressed downward by the elastic force of the spring 11 because the tip thereof is positioned substantially at the center of the lamp unit 1. There are 24.

  By configuring the tab pressing member 10 as described above, the only member exposed to heating is the tab pressing member 24, so the main body of the tab pressing member 10 having a relatively complicated form becomes a non-consumable item, Since only the tab pressing member 24 having a simple form is a consumable, the cost of the consumable can be reduced.

The tab pressing element 24 is made of a metal spring having elasticity such as a wire, so that the amount of rocking at the tip can be increased and the cell C having a large warp can be handled.
Further, by setting the pre-pressure due to the spring property (elasticity) of the tab presser 24 itself to be smaller than the pre-pressure due to the spring 11, the cylinder 12 is lowered to bring the tab presser 24 into contact with the cell C. Since the impact can be reduced, the ascending / descending operation of the cylinder 12 can be speeded up, and the productivity can be improved in combination with the speeding up of the cell conveying means.

FIGS. 9-12 is a figure for demonstrating another example of the tab press member 10 used for this invention.
The wire-shaped tab pressing member 24 described with reference to FIG. 8 is inserted into a hole 10c provided in the main body of the tab pressing member 10 as shown in FIGS. It is fixed with a set screw 25, and is configured so that the tab presser 24 can be easily attached and detached.

  When the pressing member main body in the tab pressing member 10 including the pressing member main body and the pressing element 24 illustrated in FIGS. 9 and 10 is densely provided on the fulcrum shaft 6 as shown in the side view illustrated in FIG. Since the tab pressing member 24 can be attached by selecting the pressing member main body at a desired position, for example, the mounting pitch of the tab pressing member 24 at the time of the setup change corresponding to the change in the cell size (length direction) can be selected. The change and the change of the tab pressing range can be performed very simply.

In the example of the tab pressing means illustrated in FIGS. 11 and 12, the rear end side of the tab pressing element 26 formed in a thin plate shape when viewed from above is inserted into the groove 10d provided in the main body of the tab pressing member 10, and the tab is pressed. The pressing member main body is fixed by a set screw 25 from the side surface. This tab pressing member 10 is also exemplified in FIG. 9 and FIG. 10 for changing the mounting pitch of the tab pressing element 24 and changing the tab pressing range at the time of setup change corresponding to the change in the size (length direction) of the cell C. Similar to the above, there is an effect that can be performed very simply.
In the above description, the set screw 25 is used as the tab pressing member 24 or the fixing member of the same. However, the fixing member is not limited to the set screw 25, and an appropriate spring plunger or pin can be used.

In the present invention, for the convenience of replacement or changeover of the tab pressing member 24 or 26, the heater unit 1 or 1A, 1B or the like is heated so that the bottom surface (heat irradiation surface) is directed horizontally or upward. It is desirable to make the unit rotatable.
Specifically, although not shown, for example, a method in which a portion where the cylinder 12 and the heater unit (lamp unit) are coupled to each other via a shaft or the like can be rotated, or the cylinder 12 and the heater unit can be rotated. The bottom surface of the heater unit can be directed horizontally or upward by appropriately adopting a method in which the coupling unit is provided with a hinge so that the heater unit can swing.

  The present invention is as described above. In the soldering of solar cells and tab leads in solar cell manufacturing, the rear end side of the tab lead pressing member that elastically presses each tab lead by the respective front end side is used for soldering. The tab lead pressing member is supported on each cell surface by swinging and supporting the pressing member supporting portion provided outside the heating irradiation range of the heater unit by applying a pressing force by a spring or the like. On the other hand, the following specific effects can be obtained because they are individually swung and copied.

(1) Even if a solder ball by solder dip is attached to the cell, the tab lead can be held in contact with the cell surface without damaging the cell.
(2) Even if the cell is initially distorted, the tab lead can be held in contact with the cell surface without damaging the cell.
(3) Even when the cell is bent during solder heating, the tab lead can be held in contact with the cell surface without damaging the cell.
(4) One type of tab pusher can handle narrow cells to wide cells.
(5) Since there is nothing other than the tab pressing element (tab pressing portion) that blocks the heater's heating irradiation, there is no solder failure in which a portion where the solder cannot be melt-connected occurs.
(6) Since the shielding portion by the tab pressing member is in a very small range, cell cracking or excessive cell bending due to excessive heating of the unshielded portion does not occur.
(7) Since the member exposed to heating is only the tip side of the tab pressing member or only the tab pressing member, the consumables can be minimized.
(8) Since there are few consumables and replacement can be done easily and simply, unnecessary equipment stoppage can be reduced and productivity can be improved.
(9) The tab lead interval change accompanying the change in cell size can be easily changed (width change).
(10) The tab pressing member interval can be set simultaneously with the heater unit interval setting because the pressing member is integral with the heater unit.
(11) In the inventions of claims 1 to 7, the mounting pitch and the number of mounting of the tab pressing members can be changed relatively easily by replacing each tab pressing device.
(12) In the invention of claim 6, the setting and changing of the mounting pitch and the number of mounting of the tab pressing members can be carried out very simply.
(13) Furthermore, in the invention of claim 6, the consumables can be limited to a simple-shaped tab presser, and the consumables cost can be reduced.
(14) In the invention of claim 7, the amount of rocking of the tip of the tab presser can be increased, and it is possible to deal with cells having larger warping and bending.
(15) Further, in the invention of claim 7, the vertical movement of the heater unit can be speeded up, and the productivity can be improved.

The side view of the principal part of an example of this invention tab lead press apparatus. The side view of the principal part of the other example of this invention tab lead press apparatus. The bottom view of the principal part in the apparatus of FIG. The AA arrow end surface enlarged view of the apparatus of FIG. The front sectional view of an example of the device of the present invention which formed the whole device up and down. The front sectional view of the example of the device of the present invention formed to be variable in width corresponding to the front width of the cell (in relation to the feeding direction) in addition to the elevating function. FIG. 7 is a front sectional view of an example of the apparatus of the present invention using a hot air heater instead of a lamp as a heat source in the apparatus of the present invention of FIG. FIG. 5 is a front sectional view for explaining another example (second example) of the pressing member of the tab lead in the device of the present invention shown in FIG. 4. The front view of the 3rd example of the tab lead press member used for this invention apparatus. The top view of FIG. The front view of the 4th example of a tab lead press member. FIG. 12 is a plan view of FIG. The partial side view of the example of the photovoltaic cell and tab lead of a soldering process. FIG. 14 is a plan view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating lamp unit 2 Infrared lamp 3 Protective window 4 Tab lead pressing device mounting base 5 Spring shaft provided on mounting base 4 6 Support shaft 7 Stopper shaft 8 Colored spacer 9 End spacer
10 Tab lead pressing member
10a Spring hole
10b Press end
11 Pressing spring
12 cylinders

Claims (7)

  In soldering the solar cell and the tab lead, the rear end side of each tab lead pressing member that presses each tab lead at the front end side is rocked to the support portion provided outside the heating irradiation range of the heater unit via an elastic body. A dove lead pressing method, wherein the tab lead is pressed against the cell surface by movably supporting the respective pressing members so as to swing individually with respect to each cell surface.   2. The method of pressing a doubling lead according to claim 1, wherein each tab lead pressing member is provided integrally with the heater unit so as to be movable in the width direction of the cell row in accordance with the width of the solar cell, and presses the tab lead against the cell surface. .   Each tab lead pressing member is supported by a shaft that is parallel to the length direction of the heater unit and that is provided outside the heating irradiation range of the heater unit so as to be swingable via a spring. The method for pressing a doubling lead according to claim 1 or 2, wherein only the front end side of the tab lead pressing member is positioned within the heating irradiation range.   In a solar cell soldering apparatus for connecting a solar cell and a tab lead by heating a row of solar cells in which tab leads are installed in a superposed manner, heating of a heater unit arranged along the cell row A fulcrum shaft attached outside the irradiation range, and a fulcrum mounted in parallel with the fulcrum shaft so as to be able to swing, and their tips were provided so as to be able to abut each tab lead position on each cell. A plurality of tab lead pressing members and an elastic force acting body provided by a spring or the like that is provided outside the heating irradiation range of the heater unit and is connected to each tab lead pressing member and applies an elastic force in the pressing direction of the tab lead to the pressing member. A tab lead pressing device in a solar cell soldering device.   In a solar cell soldering apparatus for connecting a solar cell and a tab lead by heating a solar cell in which tab leads are installed in a superposed manner from above, a lamp heater as a heater unit disposed along the row of cells The tab lead pressing apparatus in the solar cell soldering apparatus according to claim 4, wherein the unit or the hot air heater unit is provided.   6. The solar cell according to claim 4 or 5, wherein the tab lead pressing member is provided with a groove or a hole for attaching a pressing member at the tip of the pressing member main body, and the pressing member is inserted into the groove or the hole and fixed from the side by a fixing member. Tab lead pressing device in a soldering apparatus for a machine. The tab lead pressing member in the solar cell soldering device according to any one of claims 4 to 6, wherein the tab lead pressing member includes a pressing member made of a spring metal material on a tip side.

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