JP2001036120A - Solar cell assembly and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell assembly, capable of continuing outputting an electric power and being easily repaired, even if a solar cell goes out of order, moreover is superior in mass productivity and reliability and a method of manufacturing the same. SOLUTION: This solar cell assembly is equipped with a ceramic board 51, provided with a positive electrode 51a with a load 80 and a negative electrode 51b which are both patterned on its front surface, a solar cell 52 jointed to a part of the positive electrode 51a and the negative electrode 51, a bypass diode of bare chip type jointed on the land 80 formed on the positive electrode 51a, a positive electrode lead 54 jointed to the other part of the positive electrode 51a, and a negative electrode lead 55 jointed to other parts of the negative electrode 51b and the bypass diode 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell assembly used in a concentrating and tracking type power generation system and a method of manufacturing the same. The present invention relates to a technology for improving the productivity and reliability of a solar cell assembly that can be specified as follows.

[0002]

2. Description of the Related Art Conventionally, as a photovoltaic power generation system, a flat plate type power generation system and a condensing and tracking type power generation system are known. In a flat panel power generation system, for example, electric power is extracted from solar cell panels arranged in a plane on a roof of a house. In this flat plate type power generation system, since the solar cell is fixed, most of the sunlight is lost depending on the azimuth and elevation angle of the sun, and there is a drawback that the effective power generation time is short.

On the other hand, a condensing and tracking power generation system is
A power generation unit is provided in which a plurality of solar cells having a condensing lens are arranged on a frame that can rotate up, down, left, and right. Then, by driving the frame according to a signal from the sun position sensor, the power generation unit is controlled so as to always face the sun. In this concentrating and tracking power generation system, the solar cell is controlled so that the incident angle of the sunlight is always zero or a value near the solar cell, so that power is generated as long as the sunlight is present. Therefore, there is an advantage that the effective power generation time is substantially increased.

[0004] The solar cell used in this concentrating and tracking type power generation system has a small output alone. Therefore,
In order to obtain the required voltage and current, a plurality of solar cells are connected in series in the concentrating and tracking power generation system. In practice, a plurality of solar cells connected in series are modularized to form a power generation module, and a plurality of the power generation modules are connected in series so as to obtain a required voltage and current.

[0005]

When an open-mode failure occurs in any of the solar cells used in the concentrating and tracking type power generation system configured as described above, all the solar cells are connected in series. Because of the connection, the output of the photovoltaic system goes to zero. But,
Since the probability of a plurality of solar cells failing at the same time is very low, there is a demand that the power generation be continued in the remaining normal solar cells even if the output decreases.

Further, when a failure occurs in any of the solar cells, the failed solar cell cannot be visually confirmed. Therefore, the maintenance person first specifies the failed power generation module by individually measuring the output of each power generation module using a tester. Next, the failed solar cell is specified and replaced by measuring the output of each solar cell in the specified power generation module using a tester. Alternatively, each solar cell in the specified power generation module is sequentially replaced until a desired output is obtained. Since conventional repairs are performed as described above, the repair equipment must be transported to the location where the concentrating and tracking power generation system is installed, and the failed solar cell must be identified. A large amount of time is required for the replacement work, which results in poor maintainability.

Therefore, the applicant of the present application has filed a photovoltaic power generation device that meets the above-mentioned demands and solves the above-mentioned problems (see Japanese Patent Application No. 10-248390). In this solar power generation device, a bypass diode and a light emitting diode are connected in parallel to each of a plurality of solar cells electrically connected in series. According to this photovoltaic power generator, even if an open-mode failure occurs in any of the solar cells, the current flows via the bypass diode connected in parallel to the failed solar cell. The output from will never be zero. Also,
Since the light emitting diode connected in parallel to the failed solar cell is turned on, the failed solar cell can be visually confirmed.

By the way, when assembling a solar cell assembly used in the above-mentioned photovoltaic power generator, as shown in FIG.
It is attached between the positive electrode lead and the negative electrode lead by soldering using an auxiliary copper wire or the like. In addition, a work of covering the bypass diode and the light emitting diode with a protective sheet is performed so that the collected light is not directly irradiated to the bypass diode and the light emitting diode. For this reason, there remains a problem that mass productivity is inferior due to an increase in the number of assembling steps, and a problem that reliability is inferior due to joining by soldering.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems remaining in the above-mentioned photovoltaic power generator, and an object of the present invention is to enable the output to be continued even if the solar cell fails and to be easily repaired. The present invention is to provide a solar cell assembly and a method for manufacturing the same, which are capable of performing the above-mentioned steps, and are excellent in mass productivity and reliability.

[0010]

In order to achieve the above object, a solar cell assembly according to a first aspect of the present invention has a substrate in which a first electrode having a protrusion and a second electrode are patterned on the surface. A solar cell joined to a part of the first electrode and a part of the second electrode; a bare-chip type bypass diode joined on a protrusion formed on the first electrode; A first electrode lead joined to the other part of the second electrode, a second electrode lead joined to the other part of the second electrode and the bypass diode,
And

Further, a solar cell assembly according to a second aspect of the present invention, for the same purpose as described above, comprises a substrate having a surface on which a first electrode and a second electrode having a protruding portion are patterned; A solar cell joined to a part of an electrode and a part of a second electrode, and a bare-chip type light emitting diode joined to a protrusion formed on the second electrode;
A first electrode lead joined to the other part of the first electrode and the light emitting diode; and a second electrode lead joined to the other part of the second electrode.

A solar cell assembly according to a third aspect of the present invention has a first electrode formed to have a protrusion and a second electrode formed to have a protrusion for the same purpose as described above. A substrate having electrodes patterned on its surface, a solar cell joined to a part of the first electrode and a part of a second electrode, and a bare chip type joined on a protrusion formed on the first electrode A bypass diode, a bare-chip type light-emitting diode bonded on the protrusion formed on the second electrode, and a first electrode lead bonded on the other part of the first electrode and the light-emitting diode. A second electrode lead joined to the other part of the second electrode and the bypass diode.

In the solar cell assemblies according to the first to third aspects, a heat spreader is attached to the substrate to dissipate heat, and a heat spreader is attached to the solar cell to guide incident light to the solar cell. Next condenser lens,
And may be further provided.

A method for manufacturing a solar cell assembly according to a fourth aspect of the present invention is directed to a method for manufacturing a solar cell assembly similar to the above, in which a part of a first electrode having a projected portion patterned on a substrate and a second electrode are formed. A connection between a part and a solar cell, a connection between the protrusion and a bare chip type bypass diode, a connection between another part of the first electrode and a first electrode lead, and another part of the second electrode And jointing the bypass diode and the second electrode lead at the same time.
And a second step of collectively joining the substrate and a heat spreader for dissipating heat, and joining the solar cell and a secondary condenser lens that guides incident light to the solar cell. ing.

A method of manufacturing a solar cell assembly according to a fifth aspect of the present invention is directed to a method of manufacturing a solar cell assembly for the same purpose as described above, in which a part of a first electrode patterned on a substrate and a second electrode having a protrusion are formed. Bonding of a part to a solar cell, bonding of the protrusion to a bare chip type light emitting diode, bonding of another part of the first electrode and the light emitting diode to a first electrode lead, and bonding of the second electrode The other part and the second
A first step of collectively bonding the electrode leads, and bonding the substrate to a heat spreader for dissipating heat;
And a second step of collectively joining the solar cell and a secondary condenser lens that guides incident light to the solar cell.

Further, a method for manufacturing a solar cell assembly according to a sixth aspect of the present invention includes a part of a first electrode having a patterned protrusion on a substrate and a protrusion for the same purpose as described above. A part of the second electrode and a solar cell; a projection of the first electrode and a bare chip type bypass diode; a projection of the second electrode and a bare chip type light emitting diode; A first step of collectively joining another part of the electrode and the light emitting diode to the first electrode lead and joining another part of the second electrode and the bypass diode to the second electrode lead And a second step of collectively joining the substrate and a heat spreader for dissipating heat and joining the solar cell and a secondary condenser lens that guides incident light to the solar cell. It is provided.

In the method of manufacturing a solar cell assembly according to the fourth to sixth aspects, the bonding performed in the first step is performed by using a tin-based soft solder material containing no lead and a predetermined temperature. The bonding performed in the second step can be performed by heating at a predetermined temperature for a predetermined time using a silicone-based adhesive material.

In the solar cell assembly according to the first to third aspects and the method for manufacturing the solar cell assembly according to the fourth to sixth aspects, the first electrode is a positive electrode and the second electrode is a negative electrode. can do. Alternatively, conversely, the first electrode can be a negative electrode and the second electrode can be a positive electrode. Similarly, the first electrode lead can be a positive electrode lead and the second electrode lead can be a negative electrode lead. Or conversely, the first electrode lead is a negative electrode lead,
The second electrode lead can be a positive electrode lead.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings, illustrating a solar cell assembly and a method of manufacturing the same according to an embodiment of the present invention.

First, in order to facilitate understanding of the present invention,
A concentrating and tracking power generation system to which a solar cell assembly according to an embodiment of the present invention is applied will be described with reference to FIG. This concentrating-tracking type power generation system has a support 11
5 × 3 power generation modules 10 are fixed to a frame 12 supported by the power generation module. Hereinafter, the 15 power generation modules are collectively referred to as a power generation unit 16.

At the lower end of the column 11, a horizontal drive mechanism 13 for rotating the entire frame 12 in the azimuth direction is provided. Also, a frame 1 is provided at the upper end of the support 11.
Vertical drive mechanism 14 for rotating the whole 2 in the elevation direction
Is provided.

As will be described in detail later, each power generation module 10 includes a plurality of solar cells that generate DC power by irradiating light condensed by a lens, and the DC power generated by each solar cell is It is integrated and output to the outside of each power generation module. In addition, each power generation module 10
Are electrically connected serially, the DC power from each power generation module 10 is integrated, and is output from an external terminal (not shown) to the outside as the power generated by the concentrating and tracking power generation system.

A sun position sensor 15 for detecting the sun position is provided at a predetermined portion (upper portion in FIG. 1) of the frame 12. A signal indicating the direction of the sun obtained from the sun position sensor 15 (hereinafter, referred to as a "sun position sensor signal") is supplied to a control unit (not shown). The control unit operates the horizontal drive mechanism 13 and the vertical drive mechanism 14 based on the sun position sensor signal from the sun position sensor 15 so that the light receiving surface of the power generation unit 16 always vertically faces the sun. As a result, in this concentrating and tracking power generation system, power is generated while always tracking the sun.

Next, details of the power generation module 10 are shown in FIG.
This will be described with reference to FIG. Here, it is assumed that 4 × 3 solar cells are used for one power generation module 10. As shown in an exploded perspective view of FIG.
1, a base panel 22 and a heat sink panel 23.

The lens 20 is constituted by a plate member made of, for example, acrylic resin, which is functionally divided into 4 × 3 regions, and a Fresnel lens 30 is formed in each of the 12 regions. . Each of the twelve Fresnel lenses 30 corresponds to each of twelve solar cell assemblies 40 (described in detail below) attached to the base panel 22.

The lens frame 21 is formed in a box shape having upper and lower surfaces opened, and the lens 20 is fixedly supported by a frame on the upper surface. The lens frame 21 functions as a spacer for securing a distance corresponding to the focal length of each Fresnel lens 30 in cooperation with the base panel 22.

The base panel 22 is formed in a box shape having an open upper surface, and the frame on the upper surface is used to form the lens frame 21.
Is fixedly supported. As shown in FIG. 3, 4 × 3 solar cell assemblies 40 are arranged on the bottom surface of the base panel 22. These twelve solar cell assemblies 40 are electrically connected in series by connecting different electrode leads of adjacent solar cell assemblies 40 with a bus bar 41.

The positive electrode lead of the solar cell assembly 40 at one end of the twelve solar cell assemblies 40 connected in series is connected to the first output terminal 24 provided on one side surface of the base panel 22 and to the other end. The negative electrode leads of the solar cell assembly 40 on the side are connected to the second output terminals 25 provided on the other side surface of the base panel 22, respectively. The first output terminal 24 and the second
Power is taken out from the output terminal 25.

The heat sink panel 23 is bonded to the lower surface of the base panel 22 with an adhesive as shown in FIG. The heat sink panel 23 is provided with a plurality of radiating fins, and is used to dissipate heat generated in each solar cell assembly 40 attached to the base panel 22.

Next, the above-described solar cell assembly 4
0 will be described in detail with reference to FIG.

(Embodiment 1) FIG. 4 shows a configuration of a solar cell assembly 40 according to Embodiment 1 of the present invention. FIG. 4 (A) is a plan view and FIG. 4 (B) is a front view. .
This solar cell assembly is a heat spreader 5
0, a ceramic substrate 51 on which a positive electrode 51a and a negative electrode 51b are formed, a solar cell 52, a secondary condenser lens (S
OE) 53, a positive electrode lead 54, a negative electrode lead 55, and a bypass diode 60.

The solar cell 52 converts incident light energy into electric energy. This solar cell 5
The power obtained in 2 is taken out to the outside via the positive electrode 51a and the negative electrode 51b.

The ceramic substrate 51 is used for mounting the solar cell 52 and the bypass diode 60. On the upper surface of the ceramic substrate 51, a positive electrode 51a and a negative electrode 51b are patterned by a copper foil. A part of the positive electrode 51a includes a bypass diode 6
A land 80 for mounting the “0” is formed. This land 80 corresponds to the protrusion of the present invention. The positive electrode 51a and the negative electrode 51b are each formed in a comb shape, and are arranged so as to mesh with each other. Tongue-shaped portions of the positive electrode 51a and the negative electrode 51b (portions corresponding to the teeth of a comb)
Are configured to correspond to the respective electrodes (not shown) provided on the back surface of the solar cell 52.

Positive electrode lead 54 and negative electrode lead 55
Are formed by bending a plate-like member having a predetermined shape into a step shape by, for example, press working. The shape of the positive electrode lead 54 and the negative electrode lead 55 has the shape of a stepped fork as shown in the figure. Specifically, the positive electrode lead 54 and the negative electrode lead 55 have a first surface 91, a second surface 92, a third surface 93, and a fourth surface 91 formed by stepwise bending the plate member having the predetermined shape. It has a surface 94 and a mounting portion 95, and the first surface 91 and the second surface 92 are provided with cuts for forming a comb shape.

Each tongue formed by the cut is simply called a "terminal", and when these are collectively referred to as a "terminal group". FIG. 4 shows a positive electrode lead 54 having five terminals and a negative electrode lead 55 having six terminals. In the positive electrode lead 54 and the negative electrode lead 55, the terminal group functions as a stress relaxation portion. FIG.
The uppermost terminal in the figure of the negative electrode lead 55 shown in (A) is not for extracting power from the negative electrode 51b,
It is provided to supply power to the bypass diode 60.

A mounting portion 95 provided at one end of the fourth surface 94 (the end opposite to the third surface 93) is used for mounting the bus bar 41 for connecting the solar cells. The mounting portion 95 can be formed in a shape suitable for the connection method, such as a shape suitable for crimping the bus bar 41 or a shape suitable for soldering connection. Thereby, the workability of the work of attaching the bus bar 41 can be improved. In the first embodiment,
The positive electrode lead 54 has five terminals, and the negative electrode lead 5
5 has six terminals, but the number of terminals of each electrode lead is not limited thereto, and may be any number as long as it is two or more.

The inclination of the second surface 92 and the fourth surface 94 with respect to the first surface 91 is arbitrarily determined according to the specifications of the solar cell assembly to which the positive electrode lead 54 and the negative electrode lead 55 are applied. Can be. In this case, the second
The inclination of the surface 92 and the inclination of the fourth surface 94 need not necessarily be the same. In addition, the shape of the positive electrode lead 54 and the negative electrode lead 55 is a stepped shape having four surfaces, but is not limited thereto, and may be a stepped shape having at least two surfaces. Further, the cuts for forming the terminal group are provided on the first surface 91 and the second surface 92, but the present invention is not limited to this, and cuts extending to the third surface 93 or more may be provided. .

The bypass diode 60 has an external dimension of 3 to
It is composed of a bare chip having a size of 5 mm square and a thickness of 0.4 to 0.5 mm. This bypass diode 60 is, for example,
It is configured by attaching metal for bonding to the front and back surfaces of a general power system diode, and the upper surface (the surface that contacts the negative electrode lead 55) and the lower surface (the surface that contacts the land 80) are electrodes. . Therefore, after the solar cell assembly is assembled, the bypass diode 60 is electrically connected to the solar cell 52 in parallel.

The heat spreader 50 is a solar cell 5
2 is used to diffuse heat conducted through the ceramic substrate 51. This heat spreader 50
Is provided with a concave portion (not shown) for accommodating the ceramic substrate 51. The heat spreader 50 is bonded to the bottom surface of the base panel 22. Thereby, the heat diffused by the heat spreader 50 is conducted to the heat sink panel 23 via the bottom surface of the base panel 22 to prevent performance degradation due to the high temperature of the solar cell 52.

The secondary condenser lens 53 is provided to absorb the optical axis shift of the light collected by the Fresnel lens 30. That is, even if the light from the Fresnel lens 30 is incident on a position shifted from the center of the upper surface of the secondary condenser lens 53, the total incident light is totally reflected by the inner wall surface of the secondary condenser lens 53, so that the total incident light It acts to be guided to the cell 52.

Next, an assembling process of a solar cell assembly composed of the above components will be described.

First, in the first step, the ceramic substrate 5
1. A positive electrode 51 including a land 80 patterned on
a and the negative electrode 51 b, electrodes (not shown) formed on the back surface of the solar cell 52, the upper and lower surfaces of the bypass diode 60, and the back surface of each of the first surfaces 91 of the positive electrode lead 54 and the negative electrode lead 55. Then, a tin-based soft solder containing no lead is adhered by reflow at 230 to 235 ° C., and then the soak temperature is reduced to about 20 ° C.
Heat for 5-7 minutes at 0 ° C. As a result, the solar cell 52, the bypass diode 60, the positive electrode lead 54, and the negative electrode lead 55 are collectively joined to the ceramic substrate 51.

Next, in the second step, the lower surface of the ceramic substrate 51, the concave portion (not shown) of the heat spreader 50, the upper surface of the solar cell 52, and the secondary condenser lens 53
A silicone-based adhesive material is applied to the lower surface of the substrate, and these are pressed. In this state, heat treatment is performed at 100 to 150 ° C. for 30 to 60 minutes. Thereby, the adhesive material is solidified, and the assembly of the solar cell assembly is completed.

According to the above-described solar cell assembly and the method of manufacturing the same, the step of manually soldering the bypass diode 60 as in the related art is not required, so that
The manufacturing process can be simplified, and mass productivity is greatly improved. Further, since no manual operation is required for attaching the bypass diode 60, the reliability of the solar cell assembly can be improved.

The solar cell assembly assembled as described above is connected in series by joining the electrode lead mounting portion and the adjacent solar cell assembly electrode lead mounting portion with a bus bar, thereby providing a desired connection. The power generation module which can obtain the electric power of the above is constituted.

(Embodiment 2) In Embodiment 1 described above, the bypass diodes are also joined together at the time of assembling the solar cell assembly. In Embodiment 2, light emitting diodes are also used. It is configured to be joined together.

FIG. 5 is a plan view showing a solar cell assembly according to the second embodiment. This solar cell assembly is different from the solar cell assembly of the first embodiment in that
The light emitting diode 61 is additionally provided. Hereinafter, a description will be given focusing on a portion different from the solar cell assembly of the first embodiment.

The ceramic substrate 51 is a solar cell 5
2. Used to mount the bypass diode 60 and the light emitting diode 61. On the upper surface of the ceramic substrate 51, a positive electrode 51a and a negative electrode 51b are patterned by copper foil. A part of the positive electrode 51a includes
A land 80 for mounting the bypass diode 60 is formed, and a light emitting diode 6 is provided on a part of the negative electrode 51b.
A land 81 for mounting the device 1 is formed. This land 81 corresponds to the protrusion of the present invention.

FIG. 4 shows a positive electrode lead 54 and a negative electrode lead 55 each having six terminals. The lowermost terminal of the positive electrode lead 54 in the drawing is not for extracting power from the positive electrode 51a, but for the light emitting diode 61.
Is provided to supply power. Similarly, the uppermost terminal of the negative electrode lead 55 in the figure is not for extracting power from the negative electrode 51b, but for the bypass diode 6
0 is provided to supply power.

The light emitting diode 61 has an outer dimension of 3 to 5 m.
It is composed of bare chips of m □ and a thickness of 0.4 to 0.5 mm. The light emitting diode 61 is configured by, for example, applying a bonding metal to a part of the front surface and the back surface, and the upper surface (the surface that contacts the positive electrode lead 54) and the lower surface (the surface that contacts the land 81) are each an electrode. It has become. Therefore, the light emitting diode 61 is electrically connected in parallel to the solar cell 52 after the solar cell assembly is assembled.

The light emitting state of the light emitting diode 61 is as follows.
For example, it is arranged at a position visible through the lens 20 or at a position visible from a hole (not shown) formed in the joint surface between the bottom surface of the base panel 22 and the heat sink panel 23.

The method of manufacturing the solar cell assembly according to the second embodiment is also performed in the same manner as in the first embodiment, though the description is omitted. The same effects as in the first embodiment can be obtained by the solar cell assembly and the method of manufacturing the same according to the second embodiment.

In the second embodiment, the bypass diode 60 is connected to the land 80 and the light emitting diode 61 is connected to the land 81.
Only the land 80 or the land 81 may be joined. Further, both the bypass diode 60 and the light emitting diode 61 may be joined to the land 80 or the land 81. In this case, one of the lands 80 and the lands 81 becomes unnecessary, so that the solar cell assembly can be made compact.

Next, the electrical configuration of the condensing and tracking power generation system configured as described above will be described. In this concentrating and tracking power generation system, a solar cell assembly equipped with both the bypass diode 60 and the light emitting diode 61 shown in FIG. 5 is used.

FIG. 6 is a circuit diagram showing the electrical configuration of the power generation module 10 used in this light-gathering-tracking type power generation system. The power generation module 10 is configured by connecting 12 solar cells 52 in series. The output of the power generation module 10 is the first output terminal 2
4 and the second output terminal 25. A bypass diode 60 and a light emitting diode 61 are connected to each solar cell 52 in parallel.

The bypass diode 60 is reverse biased when the solar cell 52 is operating normally. As a result, no current flows through this bypass diode 60. Similarly, the light emitting diode 61 is also
Is reverse biased when is operating normally. As a result, no current flows through the light emitting diode 61, so that the light emitting diode 61 is not turned on. The maintenance person can confirm that the solar cell 52 is normal by confirming that the light emitting diode 61 is turned off.

On the other hand, when an open mode failure occurs in the solar cell 52, the bypass diode 60 becomes forward biased. Thereby, the bypass diode 60
Current flows through Therefore, even if a failure in the open mode occurs in the solar cell 52, the output from the power generation module 10 only decreases and does not become zero. Similarly, when an open mode failure occurs in the solar cell 52,
The light emitting diode 61 is also forward biased. This allows
Since current flows through the light emitting diode 61, the light emitting diode 61 is turned on. Therefore, the maintenance person can recognize that the solar cell 52 is out of order by confirming that the light emitting diode 61 is turned on.
Repair work can be performed in a short time by replacing the solar cell assembly 40 including the failed solar cell 52.

[0058]

As described in detail above, according to the present invention,
The present invention can provide a solar cell assembly which can continue its output even if the solar cell fails and can be easily repaired, and is excellent in mass productivity and reliability, and a method of manufacturing the same.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing the entire appearance of a converging and tracking power generation system to which a solar cell assembly of the present invention is applied.

FIG. 2 is an exploded perspective view showing the power generation module shown in FIG.

FIG. 3 is an exploded perspective view showing a state where a solar cell assembly is mounted on the base panel shown in FIG. 2;

FIG. 4 is a diagram showing a configuration of a solar cell assembly according to Embodiment 1 of the present invention.

FIG. 5 is a diagram showing a configuration of a solar cell assembly according to Embodiment 2 of the present invention.

FIG. 6 is a circuit diagram illustrating an electrical configuration of a concentrating and tracking power generation system to which a solar cell assembly according to a second embodiment of the present invention is applied.

FIG. 7 is a diagram showing a configuration of a solar cell assembly including a problem to be solved by the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 40 solar cell assembly 41 bus bar 50 heat spreader 51 ceramic substrate 51 a positive electrode 51 b negative electrode 52 solar cell 53 secondary condenser lens 54 positive electrode lead 55 negative electrode lead 60 bypass diode 61 light emitting diode 80, 81 land

Continuation of the front page (72) Inventor Tsugio Masuda 1-10-1 Shinsayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. F term (reference) 5F051 BA03 BA17 EA01 EA06 EA09 EA11 JA02 JA07 JA10 JA13 KA07 KA08

Claims (8)

[Claims] A first electrode having a protruding portion and a second electrode patterned on a surface thereof; a solar cell joined to a part of the first electrode and a part of a second electrode; A bare chip type bypass diode joined on the protrusion formed on one electrode, a first electrode lead joined to another part of the first electrode, another part of the second electrode, and A second electrode lead joined on the bypass diode. 2. A substrate having a first electrode and a second electrode having a protrusion patterned on a surface thereof; a solar cell joined to a part of the first electrode and a part of a second electrode; A bare-chip type light emitting diode joined on the protrusion formed on the two electrodes; another part of the first electrode and a first electrode lead joined on the light emitting diode; A second electrode lead joined to a part of
And a solar cell assembly comprising: 3. A substrate having a surface patterned with a first electrode formed with a protrusion and a second electrode formed with a protrusion, a portion of the first electrode and a second electrode. A solar cell joined to a part of an electrode; a bare chip type bypass diode joined on a projection formed on the first electrode; and a bare chip joined on a projection formed on the second electrode. A light emitting diode of a type; a first electrode lead joined to the other part of the first electrode and the light emitting diode; and a second electrode joined to the other part of the second electrode and the bypass diode. A solar cell assembly comprising: an electrode lead; 4. A heat spreader adhered to the substrate to dissipate heat, and a secondary condenser lens adhered on the solar cell and guiding incident light to the solar cell. The solar cell assembly according to any one of claims 1 to 3. 5. A junction between a part of a first electrode and a part of a second electrode having a projection patterned on a substrate and a solar cell; a junction between the projection and a bare chip type bypass diode; A first step of collectively joining another part of one electrode to the first electrode lead and joining another part of the second electrode and the bypass diode to the second electrode lead; A second step of jointly joining the substrate and a heat spreader for dissipating heat, and joining the solar cell and a secondary condenser lens that guides incident light to the solar cell in a lump;
A method for manufacturing a solar cell assembly comprising: 6. A junction between a part of a first electrode patterned on a substrate and a part of a second electrode having a projection, and a solar cell; a junction between the projection, and a bare chip type light emitting diode; The other part of the one electrode and the light emitting diode and the first
A first step of collectively joining the electrode lead and joining the other part of the second electrode to the second electrode lead; joining the substrate to a heat spreader for dissipating heat; and A second step of collectively joining the solar cell and a secondary condenser lens that guides incident light to the solar cell;
A method for manufacturing a solar cell assembly comprising: 7. A junction between a part of a first electrode having a protrusion patterned on a substrate and a part of a second electrode having a protrusion and a solar cell, and a protrusion of the first electrode and a bare chip type. A junction with a bypass diode; a junction between a protrusion of the second electrode and a bare chip type light emitting diode; another part of the first electrode and the light emitting diode and a first
A first step of collectively joining the electrode lead and joining the other part of the second electrode and the bypass diode to the second electrode lead; and a heat spreader for dissipating heat with the substrate. And a second step of collectively joining the solar cell and a secondary condenser lens that guides incident light to the solar cell,
A method for manufacturing a solar cell assembly comprising: 8. The bonding performed in the first step is performed by heating at a predetermined temperature for a predetermined time using a lead-free soft brazing material using tin as a base material, and is performed in the second step. The method for manufacturing a solar cell assembly according to any one of claims 5 to 7, wherein the bonding is performed by heating using a silicone-based adhesive material at a predetermined temperature for a predetermined time.