JP2016048763A - Solar cell module and clock with solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module including plural solar cells capable of cost reduction, and to provide a clock with solar cell.SOLUTION: A solar cell module 30 of a clock with solar cell includes: a pair of solar cells 31 and 32 which are disposed parallel to each other in planar view; and a light transmissive surface sheet 33 which is attached to the surface of the solar cells 31 and 32. With this, the surface of the solar cells 31 and 32 is covered and protected by the surface sheet 33 attached to the surface thereof. Also, the surface sheet 33 integrates the solar cells 31 and 32.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a solar cell module including a solar cell and a timepiece with a solar cell.

Conventionally, a solar cell included in a timepiece with a solar cell is configured by laminating a semiconductor layer such as amorphous silicon and a transparent electrode on the surface of a stainless steel plate (see, for example, Patent Document 1).
In the solar cell of Patent Document 1, the semiconductor layer and the transparent electrode layer formed on the surface of the stainless steel plate are divided in a plane to form four cells.

Japanese Patent Laid-Open No. 10-239453

  By the way, in the solar cell of patent document 1, when there is a defect in at least one cell, each cell is formed on the surface of a common stainless steel plate even though there is no defect in the remaining cells. The production efficiency is poor. For this reason, the method of producing the solar cell with which the cell was formed on the surface of the separated stainless steel plate, and using the produced several solar cell integrally is considered. However, a method for integrating a plurality of solar cells without cost has not been established.

  An object of the present invention is to provide a solar cell module including a plurality of solar cells and capable of reducing costs, and a solar cell timepiece.

  The present invention is a solar cell module of a watch with a solar cell, a plurality of solar cells arranged side by side in a plan view, a surface sheet that transmits light, attached to the surface of the plurality of solar cells, It is characterized by providing.

For example, a transparent electrode is formed on the surface of the solar cell and needs to be protected. In the present invention, the surface of the solar cell is covered and protected by a surface sheet attached to the surface. In addition, the light incident from the front side of the solar cell module passes through the surface sheet and enters the solar cell.
Moreover, a surface sheet is attached to the surface of a several solar cell. That is, a plurality of solar cells are fixed and integrated on one surface sheet.
Thus, according to the present invention, since the plurality of solar cells are integrated by the surface sheet that protects the surface of the solar cell, the member that protects the surface of the solar cell and the member that integrates the plurality of solar cells; Compared with the case where is constructed with separate parts, the number of parts can be reduced and the cost can be reduced.

In the solar cell module of the present invention, it is preferable that the surface sheet is colored in a region overlapping with the gaps between the plurality of solar cells in plan view.
Since the solar cell is not transparent, when the solar cell module is viewed from the front side, the color is different between the portion where the solar cell is arranged and the gap between the solar cells. Since the region overlapping the gap in plan view is colored, for example, with the same color as the solar cell, the difference in color can be made inconspicuous and the appearance can be improved.

The solar cell module of this invention WHEREIN: It is preferable to provide the back surface sheet attached to the back surface of these solar cells.
If only the topsheet is attached, when the gap between the solar cells is configured in a straight line, a plurality of integrated solar cells may be bent along the gap. In the present invention, since the sheets are attached to both surfaces of the plurality of solar cells, even if the gap is configured in a straight line, the plurality of integrated solar cells can be hardly bent along the gap.
As a result, it is possible to prevent the solar cell module from being difficult to be transported and incorporated into other components.

In the solar cell module of the present invention, it is preferable that the back sheet has a smaller area than the top sheet.
Since the back surface of the solar cell is made of a SUS substrate (stainless steel plate) and does not need to be protected, in the present invention, the back sheet has a smaller area than the surface sheet protecting the surface. Thereby, compared with the case where a back surface sheet has the same area as a surface sheet, the exposed area of the back surface of a solar cell can be widened. Thereby, for example, when the solar cell is a type using a SUS substrate as an electrode, the arrangement area of the connecting member that contacts the back surface and electrically connects the solar cell and the external member is widened. And the arrangement of the connecting members can be optimized.

In the solar cell module of the present invention, it is preferable that the plurality of solar cells include a plurality of stacked power generation layers.
According to the present invention, it is possible to increase the power generation voltage of the solar cell module as compared with the case where the power generation layer of the solar cell is configured as a single layer.

  In the solar cell module of the present invention, one solar cell of two adjacent solar cells includes a protruding portion formed to protrude toward the other solar cell of the adjacent solar cells in plan view, and the other It is preferable that the solar cell is provided with a recess that is recessed in a direction away from the one solar cell in plan view and in which the protruding portion is disposed.

According to the present invention, the gap between two adjacent solar cells is not configured in a straight line in a plan view. It is difficult to bend along the gap.
As a result, it is possible to prevent the solar cell module from being difficult to be transported and incorporated into other components.

A timepiece with a solar cell according to the present invention includes the solar cell module.
According to this invention, since the said solar cell module is provided, cost can be reduced.

It is a top view of the electronic timepiece concerning a 1st embodiment of the present invention. It is sectional drawing which shows the internal structure of the electronic timepiece in the said 1st Embodiment. It is a top view of the solar cell module in the said 1st Embodiment. It is sectional drawing of the solar cell module in the said 1st Embodiment. It is a top view of the solar cell module which concerns on 2nd Embodiment of this invention. It is a top view of the solar cell module which concerns on 3rd Embodiment of this invention. It is sectional drawing of the solar cell module in the said 3rd Embodiment. It is a top view of the solar cell module which concerns on the modification 1 of this invention. It is a top view of the solar cell module which concerns on the modification 2 of this invention. It is a top view of the solar cell module which concerns on the modification 3 of this invention. It is a top view of the solar cell module which concerns on the modification 4 of this invention. It is a top view of the solar cell module which concerns on the modification 5 of this invention. It is a top view of the solar cell module which concerns on the modification 6 of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
[Configuration of electronic clock]
FIG. 1 is a plan view of an electronic timepiece 1 according to the present embodiment. FIG. 2 is a cross-sectional view showing the internal structure of the electronic timepiece 1.
As shown in FIG. 1, the electronic timepiece 1 is configured as a so-called solar power generation type analog wristwatch. That is, the electronic timepiece 1 constitutes the solar cell timepiece of the present invention. The electronic timepiece 1 includes a timepiece body 2 and a band 3 having both ends connected to the timepiece body 2.

  The watch body 2 has a configuration in which a dial 5 having translucency is accommodated in an exterior case 4 made of metal or synthetic resin. In the exterior case 4, a movement 20 is disposed on the back side of the dial 5 as shown in FIG. 2. Between the movement 20 and the dial 5, a solar cell module 30 including a solar cell that generates power by incident light is disposed. Further, the pointer attaching portions 21, 22, and 23 of the fourth wheel, the second wheel, and the hour wheel constituting the movement 20 pass through the center holes of the solar cell module 30 and the dial 5 and protrude to the front side. The second hand 6, the minute hand 7, and the hour hand 8 are attached to the pointer attaching portions 21, 22, 23, respectively. A circuit block 40 is disposed on the back side of the movement 20.

  In addition, a crown 9 is provided outside the outer case 4 at the 3 o'clock position for manually adjusting the minute hand 7 and the hour hand 8. The opening portion on the front side of the outer case 4 is closed with a windshield, and the opening portion on the back side is closed with a back cover 11 (see FIG. 2).

The movement 20 is driven by the electric power generated by the solar cell module 30. For this reason, although detailed illustration is omitted, the movement 20 meshes with the secondary battery that stores the electric power from the solar cell module 30, the stepping motor that is driven by the electric power from the secondary battery, or the rotor of the stepping motor. In addition to the No. 4 wheel (second wheel) meshing with the No. 5 wheel, No. 4 wheel (second wheel), the third wheel, the second wheel, the minute wheel, the hour wheel, and the hour wheel that are decelerated in order from the fourth wheel, and small iron It includes a time adjustment wheel train including a car, a time adjustment mechanism including a crown, winding stem, pinwheel, kanuki, and setting lever, a base plate made of synthetic resin that supports these components, various receiving members, and the like.
Such a movement 20 is supported by the dial receiving ring 12 attached to the inner periphery of the exterior case 4 (see FIG. 1) via a plurality of locking portions 25 provided on the outer periphery of the main plate.
The circuit block 40 is a drive control circuit block that controls the storage of power generated by the solar cell module 30 to the secondary battery and the supply of power from the secondary battery to the stepping motor.

  The movement 20 is provided with two insertion holes 26 (only one is shown in FIG. 2) penetrating the front and back. Inside each insertion hole 26, a connecting member 50 having conductivity and elasticity is inserted in a compressed state. As the connection member 50 in the present embodiment, a metal compression coil spring is employed, but is not limited thereto, and may be a conductive rubber having conductivity.

The opening on the front side of the insertion hole 26 is covered with the solar cell module 30, and the opening on the back side is covered with the circuit block 40. The solar cell module 30 and the circuit block 40 are provided with electrodes at positions corresponding to the respective insertion holes. The reason why the two insertion holes are provided is to correspond to the positive and negative electrodes. The solar cell module 30 and the electrodes of the circuit block 40 that are in opposing positions through each insertion hole are electrically connected by the connection member 50. At this time, since the connection member 50 is inserted in a state compressed in the insertion hole, both ends of the connection member 50 and each electrode are in good contact with each other by the reaction force (biasing force).
In the present embodiment, the solar cell module 30 includes two solar cells 31 and 32 as will be described later. However, the solar cells 31 and 32 are wiring members attached to the solar cell module 30 ( 2), only two connection members 50 are provided. When the solar cells 31 and 32 are not connected in series, the connection member 50 may be provided two each (four in total) corresponding to each solar cell 31 and 32.

[Solar cell module]
FIG. 3 is a plan view of the solar cell module 30 as viewed from the front side. FIG. 4 is a cross-sectional view of the solar cell module 30.
As shown in FIGS. 3 and 4, the solar cell module 30 includes a solar cell 31 (one solar cell according to the present invention) and a solar cell 32 (the other solar cell according to the present invention) arranged side by side in a plan view. And the surface sheet 33 which permeate | transmits the light attached to the surface of the solar cells 31 and 32 is provided.

  The solar cells 31 and 32 generate light by receiving light incident from the surface side through the surface sheet 33. As shown in FIG. 3, the solar cells 31 and 32 are arranged side by side in a direction connecting the 3 o'clock position and the 9 o'clock position of the electronic timepiece 1 in plan view. The solar cells 31 and 32 are formed in a substantially semicircular shape, and the solar cell 31 and the solar cell 32 are arranged to form a circle.

The solar cell 31 includes a protruding portion 317 formed so that the center of the peripheral edge 316 facing the solar cell 32 protrudes in the direction toward the solar cell 32 in plan view. The protruding portion 317 protrudes in a direction toward the solar cell 32 by a distance longer than the distance between the solar cell 31 and the solar cell 32.
The protrusion 317 is formed in a semicircular shape in plan view. That is, the peripheral edge 316 is formed in a curved shape in the protruding portion 317 in a plan view, and is formed in a straight line from the protruding portion 317 to both ends.
Further, the protrusion 317 is provided with a hole 318 through which the pointer attaching portions 21, 22, and 23 are inserted.

The solar cell 32 includes a recess 327 in which a portion facing the protruding portion 317 of the peripheral edge 326 facing the solar cell 31 is recessed in a direction away from the solar cell 31 and the protruding portion 317 is disposed.
The recess 327 is formed in a semicircular shape. That is, the peripheral edge 326 is formed in a curved shape in the concave portion 327 in a plan view, and is linearly formed from the concave portion 327 to both ends.

  That is, the gap S1 between the solar cell 31 and the solar cell 32 is not configured in a straight line in plan view. The gap S1 may be referred to as a dividing line.

  The solar cell 31 is a laminated film, and as shown in FIG. 4, in order from the back surface side, a SUS substrate (stainless steel plate) 311, an Al layer (aluminum layer) 312, a ZnO layer (zinc oxide layer) 313, The power generation unit 314 and the ITO film layer (transparent conductive film layer) 315 are laminated.

In the present embodiment, the SUS substrate 311 is a conductive substrate that functions as a negative electrode.
The Al layer 312 is a layer that has irregularities formed on the surface and scatters and reflects light transmitted through the power generation unit 314 out of light incident from the ITO film layer 315 side.
The ZnO layer 313 is a layer that adjusts the refractive index of light between the power generation unit 314 and the Al layer 312.

For example, in the present embodiment, the power generation unit 314 is a multi-junction power generation unit having a multilayer structure (multi-junction structure). The power generation unit 314 includes a first amorphous silicon germanium layer (a-SiGe layer) 314A, a second amorphous silicon germanium layer 314B, and an amorphous silicon layer (a-Si layer) 314C as power generation layers in order from the ZnO layer 313 side. With.
The first amorphous silicon germanium layer 314A and the second amorphous silicon germanium layer 314B are formed by doping germanium into amorphous silicon. The amount of germanium doped in the first amorphous silicon germanium layer 314A and the second amorphous silicon germanium layer 314B is different. The first amorphous silicon germanium layer 314A, the second amorphous silicon germanium layer 314B, and the amorphous silicon layer 314C are set to have different absorption wavelength ranges.

In this embodiment, the ITO film layer 315 is a transparent conductive film layer that functions as a positive electrode.
Similarly to the solar cell 31, the solar cell 32 is also a laminated film, and a SUS substrate 321, an Al layer 322, a ZnO layer 323, and a power generation unit 324 (first amorphous silicon germanium layer 324A, second amorphous silicon germanium layer 324B). , Amorphous silicon layer 324C) and ITO film layer 325 are laminated.

The top sheet 33 is a sheet that protects the surfaces of the solar cells 31 and 32. The surface sheet 33 is formed in a circular shape (FIG. 3), and as shown in FIGS. 3 and 4, the surface of the solar cell 31 (surface of the ITO film layer 315) and the surface of the solar cell 32 (ITO film layer). 325 surface). Here, the surface sheet 33 covers the ITO film layers 315 and 325 except for terminal portions (not shown).
As shown in FIG. 4, the surface sheet 33 includes a base material 331 and an adhesive layer 332, and is adhered and fixed to the surfaces of the solar cells 31 and 32 by the adhesive layer 332. That is, the solar cells 31 and 32 are integrated by the surface sheet 33.

The top sheet 33 has translucency and transmits part or all of incident light. For this reason, light incident from the front side passes through the surface sheet 33 and enters the solar cells 31 and 32.
As a material of the base material 331 of such a surface sheet 33, a member having light transmissivity and electrical insulation properties such as polyethylene terephthalate (PET), acrylic resin, polyvinyl chloride, and polypropylene can be used. .
In the present embodiment, the surface sheet 33 is subjected to antireflection processing. Thereby, when the solar cell module 30 is viewed from the front side, the difference in color between the portion where the solar cells 31 and 32 are disposed and the gap S1 can be made inconspicuous, and the appearance can be improved.

  Further, the top sheet 33 is provided with holes 333 through which the pointer attaching portions 21, 22 and 23 are inserted at positions overlapping the holes 318 of the solar cell 31.

[Effects of First Embodiment]
Since the solar cells 31 and 32 are integrated by the surface sheet 33 that protects the surfaces of the solar cells 31 and 32, a member that protects the surfaces of the solar cells 31 and 32 and a member that integrates the solar cells 31 and 32. Compared with the case where is constructed with separate parts, the number of parts can be reduced and the cost can be reduced.

  Since the solar cells 31 and 32 include a plurality of stacked power generation layers, the power generation voltage of the solar cell module 30 is increased as compared with the case where the power generation layers of the solar cells 31 and 32 are configured as a single layer. it can.

  Since the gap S1 between the solar cells 31 and 32 is not configured in a straight line in a plan view, the integrated solar cells 31 and 32 are bent along the gap S1 as compared to the case of being configured in a linear shape. It can prevent that it becomes difficult to carry the solar cell module 30 and to incorporate it into other parts.

  Although not formed in this embodiment, a calendar window for displaying calendar information may be formed at the 3 o'clock position of the solar cell 31 in some cases. In the present embodiment, the protruding portion 317 is formed not on the solar cell 32 on the 9 o'clock position but on the solar cell 31 on the 3 o'clock position. For this reason, the area of the solar cell 31 increases by the amount of the protrusion 317 as compared to the case without the protrusion 317, but decreases by the amount of the calendar window when the calendar window is formed. Thereby, the difference of the area of the solar cell 31 and the solar cell 32 can be made small, and the difference of the electric power generation amount of the solar cell 31 and the solar cell 32 can be made small.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
FIG. 5 is a plan view of the solar cell module 30A of the second embodiment as viewed from the front side. In addition, the same code | symbol is attached | subjected to the same structure as the solar cell module 30 of 1st Embodiment.
In the solar cell module 30 </ b> A of the second embodiment, the surface sheet 33 is not subjected to antireflection processing, and the region overlapping the gap S <b> 1 of the surface sheet 33 is colored with the same color as the solar cells 31 and 32. Other configurations are the same as those of the solar cell module 30 of the first embodiment.
For example, the coloring is performed by printing on the surface of the top sheet 33. Here, since the area | region which overlaps with the solar cells 31 and 32 of the surface sheet 33 is not colored, it does not prevent the incident light from the front side from entering the solar cells 31 and 32.

[Effects of Second Embodiment]
Even when the surface sheet 33 is not subjected to antireflection processing, when the solar cell module 30A is viewed from the front side, the portion where the solar cells 31 and 32 are disposed and the gap S1 between the solar cells 31 and 32 The difference in color can be made inconspicuous and the appearance can be improved.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
FIG. 6 is a plan view of the solar cell module 30B of the third embodiment as viewed from the front side. FIG. 7 is a cross-sectional view of the solar cell module 30B of the third embodiment. In addition, the same code | symbol is attached | subjected to the same structure as the solar cell module 30 of 1st Embodiment.
The solar cell module 30B of the second embodiment is different from the solar cell module 30 of the first embodiment in that a back sheet is attached to the back surface of the solar cell. Moreover, the shape of the solar cell is different from the solar cells 31 and 32 of the first embodiment. Other configurations are the same as those of the solar cell module 30 of the first embodiment.

In 3rd Embodiment, as shown in FIG. 6, FIG. 7, the back surface sheet 34 is attached to the back surface (back surface of the SUS board | substrate 311) of the solar cell 31B, and the back surface (back surface of the SUS board | substrate 321) of the solar cell 32B. It has been.
Specifically, as shown in FIG. 7, the back sheet 34 includes a base material 341 and an adhesive layer 342, and is adhered and fixed to the back surfaces of the solar cells 31 </ b> B and 32 </ b> B by the adhesive layer 342. . As a material of the base material 341, a member having electrical insulation, such as polyester, can be used.

  Moreover, as shown in FIG. 6, the back surface sheet 34 is formed in a circular shape. The back sheet 34 has a smaller area than the top sheet 33, and the outer peripheral edge of the back sheet 34 is located inside the outer peripheral edge of the top sheet 33 in plan view.

In the third embodiment, the peripheral edges 316B and 326B of the solar cells 31B and 32B facing each other are formed in a substantially linear shape.
That is, the gap S1 between the solar cell 31B and the solar cell 32B is configured in a straight line in plan view.

[Effects of Third Embodiment]
Since sheets are attached to both surfaces of the solar cells 31 and 32, the integrated solar cells 31 and 32 can be hardly bent along the gap S1, and it is difficult to transport the solar cell module and to incorporate it into other components. Can be prevented.
Moreover, in order to make it difficult to bend the integrated solar cells 31 and 32 along the gap S1, a projecting portion like the solar cell 31 of the first embodiment is formed on the solar cell 31B, or There is no need to form a recess in the battery 32B like the solar battery 32 of the first embodiment. That is, the solar cells 31B and 32B can have the same shape. According to this, since it is only necessary to produce one type of solar cell, the cost can be reduced as compared with the case of producing solar cells having different shapes.

  Since the back sheet 34 has a smaller area than the top sheet 33, the exposed areas of the back surfaces of the solar cells 31 </ b> B and 32 </ b> B can be widened compared to the case where the back sheet 34 has the same area as the top sheet 33. Thereby, the arrangement | positioning area | region of the connection member 50 which contacts the said back surface can be taken widely, and arrangement | positioning of the connection member 50 can be optimized.

[Other Embodiments]
In addition, this invention is not limited to the structure of each said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention.
For example, in the first and second embodiments, the planar shape of the protruding portion 317 of the solar cell 31 is a semicircle, but may be a triangle as shown in FIG. 8 (Modification 1), As shown in FIG. 9, it may be a rectangle (Modification 2). Also in these cases, since the gap S1 is not configured in a straight line, the solar cell module can be hardly bent along the gap S1.

  In each said embodiment, although the solar cell is formed in semicircle shape and the surface sheet 33 and the back surface sheet 34 are formed in circular shape, this invention is not limited to this. That is, the following modifications 3 to 6 may be used.

(Modification 3)
In the solar cell module 30C of Modification 3, as shown in FIG. 10, the solar cells 31C and 32C are formed in a rectangular shape. The top sheet 33C and the back sheet 34C are also formed in a rectangular shape.

(Modification 4)
As shown in FIG. 11, in the solar cell module 30D of Modification 4, the solar cell 31D is formed in a circular shape, and the solar cell 32D is formed in an annular shape. And solar cell 31D is arrange | positioned inside solar cell 32D in planar view.
The top sheet 33D and the back sheet 34D are formed in a circular shape.

(Modification 5)
In the solar cell module 30E of Modification 5, as shown in FIG. 12, the solar cells 31E and 32E are formed in a semicircular shape, and the topsheet 33E is formed in a circular shape, but the backsheet 34E is It is formed in a rectangular shape. The solar cells 31E and 32E are arranged side by side in a direction connecting the 12 o'clock position and the 6 o'clock position of the electronic timepiece.

(Modification 6)
In the solar cell module 30F of Modification 6, as shown in FIG. 13, the solar cells 31F and 32F are formed in a semicircular shape, and the topsheet 33F is formed in a circular shape, but the backsheet 34F is It is formed in an annular shape.

  In each said embodiment, although the solar cell module is comprised by two solar cells, this invention is not limited to this. For example, the solar cell module may be composed of three or four solar cells.

In each said embodiment, although the surface sheet 33 was adhere | attached and attached to the solar cells 31 and 32 with the adhesion layer 332, this invention is not limited to this.
For example, the surface sheet 33 may be provided with an adhesive layer instead of the adhesive layer 332 and attached to the solar cells 31 and 32 by the adhesive layer.
Similarly, in the said 2nd Embodiment, although the back surface sheet 34 was adhere | attached and attached to the solar cells 31 and 32 by the adhesion layer 342, this invention is not limited to this.
For example, the back sheet 34 may include an adhesive layer instead of the adhesive layer 342 and may be attached to the solar cells 31 and 32 by the adhesive layer.

  In each of the embodiments described above, the solar cell includes a plurality of power generation layers. However, when a power generation voltage can be sufficiently obtained, the solar cell may be configured to include one power generation layer. Moreover, the solar cell provided with a some electric power generation layer and the solar cell provided with one electric power generation layer may be mixed. For example, when the size of the solar cell is different, the smaller solar cell may include a plurality of power generation layers, and the larger solar cell may include one power generation layer.

  Also in the solar cell modules of the first and third embodiments and the first to sixth modifications, similarly to the second embodiment, a region overlapping the gap S1 of the topsheet may be colored.

  DESCRIPTION OF SYMBOLS 1 ... Electronic timepiece, 30, 30A, 30B ... Solar cell module, 31, 31B, 32, 32B ... Solar cell, 314, 324 ... Power generation part, 316, 316B, 326, 326B ... Periphery, 317 ... Projection part, 327 ... Concave part, 33 ... front sheet, 34 ... back sheet, S1 ... gap.

Claims (7)

A solar cell module for a solar cell watch,
A plurality of solar cells arranged side by side in a plan view;
A solar cell module, comprising: a surface sheet that transmits light and is attached to the surfaces of the plurality of solar cells. The solar cell module according to claim 1, wherein
The solar cell module, wherein the surface sheet is colored in a region overlapping the gaps between the plurality of solar cells in plan view. In the solar cell module according to claim 1 or 2,
A solar cell module comprising a back sheet attached to the back surfaces of the plurality of solar cells. In the solar cell module according to claim 3,
The back sheet has a smaller area than the top sheet. A solar cell module. In the solar cell module according to any one of claims 1 to 4,
The plurality of solar cells includes a plurality of stacked power generation layers. A solar cell module. In the solar cell module according to any one of claims 1 to 5,
One solar cell of two adjacent solar cells includes a protruding portion formed to protrude toward the other solar cell of the adjacent solar cells in plan view,
The other solar cell includes a recess formed in a direction away from the one solar cell in a plan view and provided with the protrusion. A solar cell timepiece comprising the solar cell module according to any one of claims 1 to 6.