JP5459841B2 - Method and apparatus for joining solar cell modules - Google Patents

Description

  The present invention relates to a method for manufacturing a solar cell module, and more particularly, to a solar cell module joining method and apparatus for soldering a string ribbon to an electrode of a solar cell.

  Conventionally, photovoltaic power generation has attracted attention as a means for producing clean energy that is kind to the global environment. When photovoltaic power generation is introduced, the output is small in one solar battery cell, so that the output is increased using a solar battery module in which a plurality of solar battery cells are connected in series. Thus, what put the photovoltaic cell in a line and connected the photovoltaic cell in series is called strings.

In the step of forming the strings, string ribbons made of copper foil or the like are joined to the solar battery cells by solder. The first half of the string ribbon is soldered to the electrode on the upper surface of the solar cell, and the second half of the string ribbon is soldered to the electrode on the lower surface of the adjacent solar cell.
Conventionally, as a method of joining a string ribbon to a solar battery cell, a method has been proposed in which solder coated on the surface of the string ribbon is melted with hot air (hot air) and soldered (see Patent Document 1). .

JP 2007-273830 A

  Although silicon is used as a raw material for solar cells, there is a problem that the material and manufacturing cost are high, and cost reduction is required. As one of the countermeasures, reduction of the amount of silicon used has been studied, and a technology for thinning the silicon to a thickness of about 200 μm or less is being developed. However, the conventional solar cell and string ribbon joining method requires several seconds to join, so the string ribbon and the entire solar cell are heated, resulting from the difference in thermal expansion between the silicon and the string ribbon at the time of joining. Due to the thermal stress, warpage occurs in the silicon after bonding, and in the worst case, a problem occurs that the solar battery cell is cracked. In particular, as silicon becomes thinner, the problem of warpage has become more prominent.

According to the joining method using hot air disclosed in Patent Document 1, it is possible to suppress the warpage of the solar battery cell by partially applying heat to the string ribbon. However, the joining method disclosed in Patent Document 1 has problems in that preheating is required and it is difficult to control the temperature of the string ribbon at the joint. The temperature of the string ribbon is determined by conditions such as the diameter of the hot air outlet, the air volume, the temperature of the hot air, the distance between the outlet and the string ribbon, the scanning speed of the hot air outlet. Therefore, it is necessary to appropriately control these conditions, and temperature management becomes troublesome. Furthermore, in the joining method disclosed in Patent Document 1, there is a possibility that solder is scattered by hot air.
In the joining method disclosed in Patent Document 1, if the string ribbon temperature at the joint becomes too high, the warpage of the solar battery cell may not be suppressed, and the temperature deviation from the expected range or the scattering of solder may occur. Therefore, there is a possibility that a good bonding state cannot be realized.

  The present invention has been made to solve the above-described problems, and a solar battery in which a string ribbon is bonded to an electrode of a solar battery cell capable of suppressing warpage of the solar battery cell and preventing generation of voids. It is an object of the present invention to provide a module joining method and a joining apparatus.

The solar cell module joining method according to the first aspect of the present invention is the solder plated string ribbon on the electrodes (14a (B), 14b (B)) formed on the opposing portions of both sides of the solar cell (B). It is a method of soldering (B, A), and is formed on the surface opposite to the mounting table described above of another solar cell (A) of the same type as the solar cell (B) mounted on the mounting table. The solar battery cell (B) is placed on the portion protruding outward from the solar battery cell (A) by the solder-plated string ribbon (A) soldered to the electrode (14a (A)). The electrode (14b (B)) formed on the surface on the mounting table side of the cell (B) is aligned and placed on the mounting table, and the solder-plated string ribbon (B) is placed on the sun. Battery cell (A, B The electrodes (14a (A or B), 14b (B or A)) formed on the two opposing surfaces are processed to the length for soldering, and the solder-plated string ribbon (B) is 4 etc. The central part of the inner part when it is divided is sucked and conveyed, and the part including the sucking part is formed on the surface opposite to the mounting table side of the solar battery cell (B) (14a (B) A pair of heater tools having a length when the electrode (14a (B)) is pressed so as to overlap with the electrode (14a (B)) and the longitudinal direction divides the electrode (14a (B)) into two equal parts in the longitudinal direction. In the solder plating string ribbons (B, A) respectively superimposed on the electrodes (14a (B), 14b (B)), a portion not including the adsorption portion is pressed, and the pair of heater tools are predetermined. Heat for hours and solder Until the melted and solidified, the pressing of the suction portion and the pressing of the pair of heater tools are continued, and after the solder plating is solidified, the pair of heater tools and the pressing portion of the suction portion are replaced, The pressing of the suction portion and the pressing of the pair of heater tools are continued until the predetermined time is heated to melt and solidify the solder plating of the remaining portion of the solder plating string ribbon (A, B). It is what.

The solar cell module joining method according to the second aspect of the present invention is such that the solder-plated string ribbon (A) soldered to the electrode (14a (A)) of the solar cell (A) is a solar cell (B). 2), the solder plating string ribbon (B) is soldered to the electrode (14a (B)) of the electrode (14a (B)).

In the solar cell module joining method according to the third aspect of the present invention, the heating of the heater tool for a predetermined time rises to a first temperature at a predetermined first time , and a predetermined first time This temperature is maintained for 2 hours.

The solar cell module joining device according to the invention of claim 4 is the solder plated string ribbon on the electrodes (14a (B), 14b (B)) formed on the opposing portions of both sides of the solar cell (B). (B, A) an apparatus for soldering, wherein the solar cell (B) and another solar cell (A) of the same type as the solar cell (B) and the solar cell (B) are mounted; A solar battery cell (B) is soldered to an electrode (14a (A)) formed on a surface opposite to the mounting table of the solar battery cell (A) by a solder-plated string ribbon (A). The electrode (14b (B)) formed on the surface on the mounting table side of the solar battery cell (B) is overlaid on the portion protruding outward from A). Placed on the mounting table And an electrode (14a (A or B), 14b (B or A)) formed on the respective opposing surfaces of the two solar cells (A, B) with the conveying means for carrying out the solder plating string ribbon (B) A processing means for processing to a length when soldering, and a central portion of one inner portion when the solder-plated string ribbon (B) is divided into four equal parts and transported, and a portion including the suction portion Adsorption, movement, and positioning so as to overlap the electrode (14a (B)) formed on the surface opposite to the mounting table side of the solar battery cell (B) and pressing the electrode (14a (B)) and pressurizing means, said electrode (14a (B), 14b ( B)) the solder plating string ribbon (B, a) superimposed on a pair of longitudinal length to melt the solder plating with pressing the Is And a heater tool having a length when the bisected longitudinally, and the pressure means for applying a respective pressing force to the pair of heater tool, and a heating means for heating each of said pair of heater tool It is characterized by this.

Bonding apparatus of the solar cell module of the invention according to claim 5, the short side of the pressing surface of the elongated rectangle of the pair of heater tool the string ribbon (A, B) the electrodes (14a wider than the width of the (A Or B) and 14b (A or B)) .

The solar cell module joining apparatus according to a sixth aspect of the present invention is characterized in that the heating means is a pulse heat power source.

According to the inventions according to claims 1 to 3 , since the temperature detection function and the pressurization function are added to the heater tool for melting the solder, the temperature control accuracy of the soldering portion is high and the reproduction characteristics are reproduced. Therefore, the method for joining the positive battery modules can be provided.

In addition, since the heat shrinkage is the same on both sides of the solar cell because the heating is performed from both sides of the solar cell with a pair of heater tools, the solar cell can be soldered with less warpage. A method for joining solar cell modules can be provided.

Also, since the soldering part of the solar cell electrode is divided into two parts and soldered, it is easier to align the heater tool to the soldering part than to solder all the soldering parts at once. Therefore, it is possible to provide a method for joining solar cell modules that enables soldering with an excellent alignment effect.

Furthermore, since the pressing force of the heater tool is released after the solder is solidified, the string ribbon is not inadvertently separated from the electrode, so that it is possible to provide a solar cell module joining method with good workability. .

According to the invention of claims 4 to 6, it is possible to provide a bonding apparatus suitable solar cell module for use in the invention according to claim 1-3.

It is a schematic block diagram of the joining apparatus of the solar cell module utilized for the joining method of the solar cell module which becomes this invention. It is the first half part of the joining process which shows one Embodiment of the joining method of the solar cell module which becomes this invention. It is the latter half part of the joining process which shows one Embodiment of the joining method of the solar cell module which becomes this invention. It is the schematic which shows the joining state of the photovoltaic cell used as a photovoltaic module, and a solder plating string ribbon.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a solar cell module joining apparatus used in a solar cell module joining method according to the present invention, and FIGS. 2 and 3 show an embodiment of a solar cell module joining method according to the present invention. FIG. 4 is a schematic view showing a joining state of a solar battery cell to be a solar battery module and a solder-plated string ribbon.
The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are indispensable as means for solving the present invention. Not always .

1-4, 1 is a solar cell in which a transparent conductive film is formed on the surface of a silicon layer, and finger portions 13a and bus bar portions 14a and 14b are formed on the surface, and 2 is a bus bar portion. 14a and 14b are solder-plated string ribbons (hereinafter also simply referred to as string ribbons) that are joined by soldering and connected to the solar cells 1 in a cascade manner. is there. The mounting table 3 is provided with a transport mechanism including a belt for moving the solar cells after string ribbon bonding, a belt driving motor, and the like, and a groove is provided so that the heater tool 7 is movable. ing.

4 is a pressurization / heating mechanism for soldering the solder-plated string ribbon 2 to the bus bar portion 14a of the collector electrode of the solar battery cell 5, and 5 is a string collector 2 for the collector electrode under the control of the pressurization / heating mechanism 4. It is a heater tool that aligns with the bus bar portion 14a and applies a predetermined pressure and temperature to melt the solder plating of the string ribbon 2 and solder it to the bus bar portion 14a of the collector electrode. The temperature of the heater tool 5 is detected by a temperature detection unit 5a using a thermocouple as a detection element, and is fed back to the pressurizing / heating mechanism 4 so that the heater tool 5 is controlled to a predetermined temperature.

Reference numeral 6 denotes a pressurizing / heating mechanism for soldering the solder-plated string ribbon 2 to the bus bar portion 14b of the collector electrode of the solar battery cell 7, and reference numeral 7 denotes the string ribbon 2 under the control of the pressurizing / heating mechanism 6. It is a heater tool that aligns with the bus bar portion 14b and applies a predetermined pressure and temperature to melt the solder plating of the string ribbon 2 and solder it to the bus bar portion 14b of the collector electrode. The temperature of the heater tool 7 is detected by a temperature detection unit 7a using a thermocouple as a detection element, and is fed back to the pressurizing / heating mechanism 6 so that the heater tool 7 is controlled to a predetermined temperature.

8 is a suction / moving / pressurizing mechanism that transports the solder-plated string ribbon 2 cut to a predetermined length to the bus bar portion 14a of the collecting electrode to be soldered and holds it in alignment; This is a suction nozzle that actually sucks the string ribbon 2 under the control of the pressurizing mechanism 8, transports the string ribbon 2 onto the bus bar portion 14a of the collector electrode, and aligns and holds it at a predetermined position with a predetermined pressure. In FIG. 1, two suction / moving / pressurizing mechanisms 8 and suction nozzles 9 are drawn. The upper left in the drawing is the string ribbon 2, while the middle is the string ribbon 2 in the drawing. Is shown during holding at the time of soldering to the bus bar portion 14a of the collector electrode, and the same object is drawn.

Next, the joining method of the solar cell module which becomes this invention is demonstrated in order of a process using FIGS. At this time, FIG. 1 and FIG. 4 are used together as appropriate.
Here, as the heater tools 5 and 7, the length of the soldering surface is half of the length of the bus bar portions 14a and 14b of the collecting electrode of the solar battery cell 1, and twice per solar battery cell. An example of soldering will be described.

First, the size and thickness of the solar battery cell 1, the length and thickness of the bus bar portion of the collector electrode formed on the solar battery cell 1, the width and length of the string ribbon 2 to be soldered, and the solder plating layer were taken into account. The pressure and temperature applied to the heater tools 5 and 7 determined according to the thickness are determined in time series. Specifically, the time from the room temperature (the temperature after a predetermined time after the end of the previous soldering when soldering continuously) to the set temperature (first temperature) (the first temperature) Time), a time for holding this temperature after reaching the set temperature (second time), and a temperature (second time) at which the solder solidifies after this holding time and the heater tools 5, 7 are separated from the string ribbon 2. Temperature). These values are preferably obtained by experiments or the like using solar cells and string ribbons that are actually used.

After such setting, soldering of the string ribbons 2 and 2 to the bus bar portions 14a and 14b of the collector electrode of the actual solar battery cell is started.
First, the solar battery cell 1 is positioned and mounted at a predetermined position on the mounting table 3 using a transport mechanism (not shown) ((a) in FIG. 2). After the mounting, the solar cells 1 are sucked by a suction mechanism (not shown) provided on the mounting table so that the position does not change.

Next, the string ribbon is pulled out from a reel on which a string ribbon (not shown) is wound, and is cut into a string ribbon 2 having a predetermined length ((b) in FIG. 2). Then, the string ribbon 2 is adsorbed by the adsorption nozzle 10 under the control of the adsorption / moving / pressurizing mechanism 8, aligned and placed on the bus bar portion 14 a of the collecting electrode of the solar battery cell 1, and then a predetermined amount. Apply pressure to prevent position fluctuations. Since the string ribbon 2 is soldered to the bus bar portion 14a of the collector electrode in half by using the heater tool 5, the suction position is divided into a quarter of the center when the string ribbon 2 is divided into four equal parts. The approximate center (FIG. 2C).

Next, under the control of the pressurizing / heating mechanism 4, the heater tool 5 is positioned and lowered just above the center of the long side of the string ribbon 2 and set to a portion corresponding to half of the string ribbon 2. Pressure is applied ((d) of FIG. 2). At the same time, under the control of the pressurizing / heating mechanism 6, the heater tool 7 is aligned and raised just above the central portion of the long side of the collector electrode bus bar portion 14b, which corresponds to half of the collector electrode bus bar portion 14b. The pressure set in the portion is applied ((d) in FIG. 2).
In this way, the solar cells 1 are pressed against each other at the set pressure by the heater tools 5 and 7 to prevent the solar cells 1 from being separated from the mounting table 3 and at the same time, the solar cells 1 are equally placed on the upper and lower surfaces of the solar cells 1. The pressure is applied.

In this way, the heater tools 5 and 7 are respectively pressed within the first time under the control of the pressurizing / heating mechanisms 4 and 6 while pressing the solar battery cell 1 with the set pressure with the heater tools 5 and 7. A current is passed so as to increase to a temperature of 1. As is well known, the current control at this time is performed by detecting the temperature of the heater tools 5 and 7 by the current using the temperature detection units 5a and 7a and feeding back to the pressurizing / heating mechanisms 4 and 6, respectively. It is executed by changing the current so that

When it is confirmed from the fed back temperature information that the first temperature set within the set first time has been reached, the pressurizing / heating mechanisms 4 and 6 respectively change the currents at that time to the first time. The flow is continued for a second time (for example, 0.5 seconds) shorter than (for example, 3 seconds), and then the current is stopped. Due to the total amount of heat of the heater tools 5 and 7 by energization of the set current for the second time, the solder plating of the string ribbon 2 corresponding to the longitudinal direction of the heater tools 5 and 7 is melted and at the same time the melted solder Thus, the string ribbon 2 and the bus bar portion 14a of the collector electrode are soldered.

Since the solder does not immediately solidify due to the remaining heat of the heater tools 5 and 7 even after the set current is stopped, the heater tools 5 and 7 continue to press the string ribbon 2 in order to prevent the string ribbon 2 from floating. During this time, the temperature of the heater tools 5 and 7 is detected by the temperature detectors 5a and 7a and fed back to the pressurizing / heating mechanisms 4 and 6 respectively, so that the second temperature which is lower than the set solder freezing point. When the temperature (for example, 180 degrees Celsius) is reached, the heater tools 5 and 7 are pulled away from the string ribbon 2. At this point, the soldering operation for this part is completed.

In this way, a part (equivalent to 1/4) of the string ribbon 2 is fixed to the bus bar portion 14a of the collector electrode, so that the suction force of the suction nozzle 9 is released under the control of the suction / movement / pressure mechanism 8, The string ribbon 2 is moved to a substantially central portion of the soldered portion, and the string ribbon 2 is pressed with a set pressure at this portion ((e) of FIG. 2).

On the other hand, under the control of the pressurizing / heating mechanisms 4 and 6, the heater tools 5 and 7 move to a portion where the string ribbon 2 is not soldered on the bus bar portion 14a of the collector electrode.
Then, under the control of the pressurizing / heating mechanism 4, the heater tool 5 is positioned and lowered just above the center of the long side of the string ribbon 2 and set to a portion corresponding to half of the string ribbon 2. Pressure is applied ((e) of FIG. 2). At the same time, under the control of the pressurizing / heating mechanism 6, the heater tool 7 is positioned just above the central portion of the long side of the collector electrode bus bar portion 14b and set to a portion corresponding to half of the collector electrode bus bar portion 14b. The applied pressure is applied ((e) of FIG. 2).

In this way, the first time set for each of the heater tools 5 and 7 under the control of the pressurizing / heating mechanisms 4 and 6 while pressing the solar cells 1 with the set pressure by the heater tools 5 and 7. A current is passed so as to rise to the first temperature set inside. As is well known, the current control at this time is set by detecting the temperature of the heater tools 5 and 7 by the current by the respective temperature detectors 5a and 7a and feeding back to the pressurizing / heating mechanisms 4 and 6, respectively. This is performed by changing the current so that the temperature becomes 1.

When it is confirmed from the temperature information fed back that the set temperature has been reached within the set time, the pressurizing / heating mechanisms 4 and 6 are supplied with the respective currents for a short time (for example, 0.5 seconds). For a second time period after which the current is stopped. Due to the total amount of heat of the heater tools 5 and 7 by applying the set current for a short time, the solder plating of the string ribbon 2 corresponding to the long side of the heater tools 5 and 7 is melted, and at the same time the string is melted with the molten solder. The ribbon 2 and the bus bar portion 14a of the collector electrode are soldered.

Since the solder does not immediately solidify due to the remaining heat of the heater tools 5 and 7 even after the set current is stopped, the heater tools 5 and 7 continue to press the string ribbon 2 in order to prevent the string ribbon 2 from floating. During this time, the temperature of the heater tools 5 and 7 is detected by the temperature detectors 5a and 7a and fed back to the pressurizing / heating mechanisms 4 and 6 respectively, so that the second temperature below the set solder freezing point (for example, , 180 degrees Celsius), the heater tools 5 and 7 are pulled away from the string ribbon 2 and returned to the origin. At this point, the soldering operation of the string ribbon 2 to the bus bar portion 14a of the collector electrode of the solar battery cell 1 is completed.

Thus, since half of the string ribbon 2 is fixed to the bus bar portion 14a of the collector electrode, the suction force of the suction nozzle 9 is released under the control of the suction / moving / pressurizing mechanism 8 and pulled away from the string ribbon 2; Return to the origin.

Since the solar cell 1 has two collector electrode bus bar portions 14a, the string ribbon 2 is also attached to the other collector electrode bus bar portion 14a as described above (paragraphs [0030] to [0040]). Solder.

Next, in order to solder the string ribbon to the bus bar portion of the collector electrode of the solar battery cell in the same movement range as described above, the heater tool 5, 7 of the adsorption mechanism fixing the solar battery cell 1 to the mounting table 3. After releasing the attracting force, a solar battery cell 1 (also referred to as a solar battery 11) to which a predetermined distance string ribbon 2 is soldered is conveyed using a driving mechanism (not shown) ((f) in FIG. 3).

At this time, the next solar battery cell 1 is transported by a transport mechanism (not shown) and transported to a predetermined position ((f) in FIG. 3). At the same time, under the control of the pressurization / heating mechanism 6, the heater tool 7 is soldered by being positioned just below the central portion in the longitudinal direction of the bus bar portion 14 b of the collector electrode of the solar cell 1 on which the heater tool 7 is placed. It is moved to a position where the attaching surface is just level with the upper surface of the mounting table 3 ((g) in FIG. 3).

Then, the photovoltaic cell 1 is positioned and placed at a predetermined position on the mounting table 3 using a transport mechanism (not shown) ((g) in FIG. 3). After the mounting, the solar cells 1 are sucked by a suction mechanism (not shown) provided on the mounting table so that the position does not change. The string ribbon 2 protruding from the solar battery cell 11 is sandwiched between the solar battery cell and the soldering surface of the heater tool 7 by the pressing force when the solar battery cell 1 is placed, so that the bus bar of the collector electrode It bends naturally so that it may be located under the part 14b and 14b ((g) of FIG. 3).

Next, as described above (paragraphs [0030] to [0041]), the string ribbons 2 and 2 are soldered to the bus bar portions 14a and 14a of the collector electrode of the solar battery cell 1 ((h) to ( j)). At the same time, the string ribbons 2 and 2 are soldered to the bus bar portions 14b and 14b of the collector electrode of the solar battery cell 1 ((h) to (j) in FIG. 3).

By repeating this soldering step (joining step) for the number of solar cells assembled as a solar cell module, the joining of the solar cell modules to be obtained is completed.
Although the present embodiment has been described in detail as described above, those skilled in the art can easily understand that many modifications can be made without departing from the novel matters and effects of the present invention. Accordingly, all such modifications are intended to be included in the scope of the present invention.
For example, since there are two collector electrode bus bar portions in the solar battery cell, the string ribbons to the collector electrode bus bar portions are soldered by providing the mechanisms described in the present embodiment for each bus bar portion. be able to.
Further, in the mechanism described in the present embodiment, the heater tool has the long side having the same length as the bus bar portion of the collector electrode of the solar battery cell, and further aligns the string ribbon outside the solar battery cell. By providing the fixing mechanism, the string ribbon to the bus bar portion of the collector electrode can be soldered by a single soldering operation.

DESCRIPTION OF SYMBOLS 1 Solar cell 2 String ribbon 3 Mounting stand 4, 6 Pressurization / heating mechanism 5, 7 Heater tool 8 Adsorption / movement / pressurization mechanism 9 Adsorption nozzle 13 Finger part 14a, 14b Bus bar part

Claims (6)

A method of soldering a solder plating string ribbon (B, A) to electrodes (14a (B), 14b (B)) formed on opposing portions of both sides of a solar battery cell (B) ,
Soldered to the electrode (14a (A)) formed on the surface opposite to the mounting table of another solar cell (A) of the same type as the solar battery (B) mounted on the mounting table. The solar battery cell (B) is formed on the surface on the mounting table side of the solar battery cell (B) on a portion protruding outward from the solar battery cell (A) by the solder plating string ribbon (A). The electrodes (14b (B)) are aligned and placed on the mounting table so that they overlap each other.
When soldering the electrodes (14a (A or B), 14b (B or A)) formed on the opposing surfaces of the two solar cells (A and B) with the solder plating string ribbon (B) To the length of
The solder plating string ribbon (B) is divided into four equal parts, and the central part of the inner part is adsorbed and conveyed, and the part including the adsorbing part is on the side opposite to the mounting table side of the solar battery (B). Align and press the electrode (14a (B)) so as to overlap the electrode (14a (B)) formed on the surface,
Solder plating superposed on each of the electrodes (14a (B), 14b (B)) by a pair of heater tools whose longitudinal direction is the length of the electrode (14a (B)) divided into two equal parts in the longitudinal direction Press a portion of the string ribbon (B, A) that does not include the adsorbing portion,
Continue pressing the suction portion and pressing the pair of heater tools until the pair of heater tools is heated for a predetermined time to melt and solidify the solder plating,
After solidification of the solder plating, the pair of heater tools and the pressing portion of the suction portion are changed,
The pair of heater tools and the pair of heater tools are pressed until the pair of heater tools are heated for the predetermined time to melt and solidify the solder plating of the remaining portion of the solder plating string ribbon (A, B). To continue,
A method for joining solar cell modules. The solder plating string ribbon (A) soldered to the electrode (14a (A)) of the solar cell (A) is soldered to the electrode (14a (B)) of the solar cell (B). The method of manufacturing a solar cell module according to claim 1, wherein soldering is performed in advance using the method of soldering. 2. The heating of the heater tool for a predetermined time rises to a first temperature at a predetermined first time and maintains this temperature for a predetermined second time. The solar cell module joining method described. A device for soldering a solder-plated string ribbon (B, A) to electrodes (14a (B), 14b (B)) formed on opposing portions of both sides of a solar battery cell (B) ,
A mounting table for mounting another solar cell (A) and solar cell (B) of the same type as the solar cell (B);
The solar battery cell (B) is a solar cell with a solder-plated string ribbon (A) soldered to an electrode (14a (A)) formed on the surface opposite to the mounting table of the solar battery cell (A). The electrode (14b (B)) formed on the surface on the mounting table side of the solar battery cell (B) is overlaid on the portion protruding outward from the cell (A). A conveying means for aligning and mounting on the mounting table,
When soldering the electrodes (14a (A or B), 14b (B or A)) formed on the opposing surfaces of the two solar cells (A and B) with the solder plating string ribbon (B) Processing means for processing to a length of
The solder plating string ribbon (B) is divided into four equal parts, and the central part of the inner part is adsorbed and conveyed, and the part including the adsorbing part is on the side opposite to the mounting table side of the solar battery (B). A suction / moving / pressurizing means for aligning and pressing the electrode (14a (B)) so as to overlap the electrode (14a (B)) formed on the surface;
A pair of longitudinal lengths that press the solder plating string ribbons (B, A) respectively superimposed on the electrodes (14a (B), 14b (B)) and melt the solder plating make the electrodes longer. A heater tool consisting of the length when divided in half in the direction ;
Pressurizing means for applying a pressing force to each of the pair of heater tools ;
Heating means for heating each of the pair of heater tools ;
A solar cell module joining apparatus comprising: The short sides of the elongated rectangular pressing surfaces of the pair of heater tools are wider than the string ribbon (A, B) and narrower than the electrodes (14a (A or B), 14b (A or B)). The joining apparatus of the solar cell module of Claim 4 characterized by these. 5. The solar cell module joining apparatus according to claim 4, wherein the heating means is a pulse heat power source.

Images