CN110463032B

CN110463032B - Solar cell module and terminal box for solar cell module

Info

Publication number: CN110463032B
Application number: CN201880020889.6A
Authority: CN
Inventors: 西尾佑太; 隅田健一郎
Original assignee: Kyocera Corp
Current assignee: Kyocera Corp
Priority date: 2017-03-29
Filing date: 2018-03-27
Publication date: 2022-03-18
Anticipated expiration: 2038-03-27
Also published as: JP6837131B2; CN110463032A; JPWO2018181289A1; WO2018181289A1

Abstract

The solar cell module includes a solar cell panel and a terminal box. The terminal box has a base body portion on the solar cell panel and a main body portion engaged with the base body portion. The base portion has a first portion, a second portion, and a first terminal portion. The first portion is provided in a state of being fixed to the solar cell panel. The second portion is provided in a state of protruding from the first portion in a direction away from the solar cell panel, and includes an engaged portion along an annular region. The first terminal portion is disposed in a state of being electrically connected to a lead wire electrically connected to the solar cell unit. The main body portion has a third portion and a fourth portion. The third portion is provided in a state of forming a closed space with the base portion, the closed space accommodating a portion including the second terminal portion and a portion of the first terminal portion which is in contact with the second terminal portion. The fourth portion includes an engaging portion provided along the annular region in a state of being rotatably and detachably engaged with the engaged portion.

Description

Solar cell module and terminal box for solar cell module

Technical Field

The present invention relates to a solar cell module and a terminal box for the solar cell module.

Background

The solar cell module includes a solar cell module in which a terminal box is attached to a rear surface of a solar cell panel. The terminal box is connected to, for example, a cable for outputting electricity obtained by photoelectric conversion in the solar cell panel to the outside of the solar cell module (see, for example, japanese patent application laid-open No. 2008-263198).

Disclosure of Invention

Disclosed are a solar cell module and a terminal box for the solar cell module.

One embodiment of a solar cell module includes a solar cell panel including a solar cell unit, and a terminal box provided on a surface of the solar cell panel. The terminal box has a base portion and a main body portion. The base portion is disposed on the surface. The main body portion is provided on the base portion in a state of being engaged with the base portion. The base portion has a first portion, a second portion, and a first terminal portion. The first portion is disposed on the surface. The second portion is provided in a state of protruding from the first portion in a first direction away from the surface, and includes an engaged portion provided along an annular region. A lead wire is provided to the first terminal portion in an electrically connected state, the lead wire being provided to a region on the surface from within the solar cell panel in an electrically connected state with the solar cell unit. The main body portion has a third portion and a fourth portion. The third portion is provided in a state of forming a closed space with the base portion, and the closed space accommodates a terminal containing portion including a second terminal portion and a portion of the first terminal portion provided in a state of being in contact with the second terminal portion. The fourth portion includes an engaging portion provided along an annular region in a state of being engaged with the engaged portion in a rotatable and detachable state.

One embodiment of a terminal box for a solar cell module includes a base portion and a main body portion that is detachable from the base portion. The base portion has a first portion, a second portion, and a first terminal portion. The first portion includes a bottom surface for being disposed on a surface of a solar cell panel including a solar cell unit. The second portion is provided in a state of protruding from the first portion in a first direction facing opposite to the bottom surface, and includes an engaged portion provided along an annular region. The first terminal portion is used for electrical connection with a lead wire that is provided from within the solar cell panel to a region on the surface in a state of being electrically connected with the solar cell unit. The main body portion has a third portion and a fourth portion. The third portion can form a closed space with the base body portion by attaching the body portion to the base body portion, the closed space accommodating a terminal containing portion including a second terminal portion and a portion of the first terminal portion provided in a state of being in contact with the second terminal portion. The fourth portion includes an engaging portion provided along an annular region and engaged with the engaged portion so as to be rotatable and detachably.

Drawings

Fig. 1 is a perspective view showing an appearance of an example of the solar cell module according to the first to fourth embodiments and the seventh to ninth embodiments.

Fig. 2 is a plan view showing an appearance of the solar cell module according to the first to fourth embodiments and the seventh to ninth embodiments as seen from the front side.

Fig. 3 is a plan view showing an appearance of the solar cell module according to the first to fourth embodiments and the seventh to ninth embodiments as seen from the back surface side.

Fig. 4 is an enlarged exploded perspective view showing an example of the structure of the IV portion in fig. 1.

Fig. 5 (a) is an exploded sectional view showing a sectional surface of the terminal box along the V-V line of fig. 4. Fig. 5 (b) is a sectional view showing a sectional surface of the terminal box along the V-V line of fig. 4.

Fig. 6 (a) is an exploded perspective view showing an example of a portion corresponding to the IV portion in fig. 1 in the solar cell module according to the second embodiment.

Fig. 7 (a) is an exploded sectional view showing a sectional surface of the terminal box along line VII-VII of fig. 6. Fig. 7 (b) is a sectional view showing a sectional surface of the terminal box along line VII-VII of fig. 6.

Fig. 8 (a) is an exploded cross-sectional view showing a cross-section corresponding to a cross-section taken along line VII-VII in fig. 6 in an example of the terminal box according to the third embodiment. Fig. 8 (b) is a cross-sectional view showing a cross-section corresponding to a cross-section taken along line VII-VII in fig. 6 in an example of the terminal box according to the third embodiment.

Fig. 9 (a) is a plan view showing an appearance of an example of the base portion of the terminal box according to the fourth embodiment as viewed from the main body portion side. Fig. 9 (b) is a plan view showing an appearance of an example of the main body portion of the terminal box according to the fourth embodiment as viewed from the base portion side.

Fig. 10 (a) is a perspective view showing an appearance of an example of the first terminal portion of the base portion according to the fourth embodiment. Fig. 10 (b) is a perspective view showing an appearance of an example of the second terminal portion of the main body portion according to the fourth embodiment.

Fig. 11 (a) is an exploded cross-sectional view showing a cross-section corresponding to a cross-section taken along line VII-VII in fig. 6 in an example of the terminal box according to the fourth embodiment. Fig. 11 (b) is a cross-sectional view showing a cross-section corresponding to a cross-section taken along line VII-VII in fig. 6 in an example of the terminal box according to the fourth embodiment.

Fig. 12 is a perspective view showing an external appearance of an example of the terminal box according to the fifth embodiment.

Fig. 13 is an exploded perspective view showing an example of the structure of the terminal box according to the sixth embodiment.

Fig. 14 is an exploded perspective view showing an example of a portion corresponding to the IV portion of fig. 1 in an example of the solar cell module according to the seventh embodiment.

Fig. 15 (a) is a plan view showing an appearance of an example of the base portion of the terminal box according to the seventh embodiment as viewed from the main body portion side. Fig. 15 (b) is a plan view showing an appearance of an example of the main body portion of the terminal box according to the seventh embodiment as viewed from the base portion side.

Fig. 16 is an exploded cross-sectional view showing a cross-section corresponding to a cross-section along the V-V line in fig. 4 in an example of the terminal box according to the eighth embodiment.

Fig. 17 is an exploded cross-sectional view showing a cross-section corresponding to a cross-section along the V-V line in fig. 4 in an example of the terminal box according to the ninth embodiment.

Fig. 18 is an exploded perspective view showing an example of a portion corresponding to the IV portion of fig. 1 in an example of the solar cell module according to the tenth embodiment.

Fig. 19 is an exploded sectional view showing a cross-sectional view of the terminal box along the XIX-XIX line of fig. 18.

Detailed Description

In a solar cell module, a resin terminal box is generally attached to the back surface of a solar cell panel in order to output electricity obtained by photoelectric conversion to the outside. A lead wire electrically connected to the photoelectric conversion unit and a cable formed by covering an electric wire for outputting electricity with a resin are connected to the terminal box. In addition, a bypass diode may be housed in the terminal box. In the case where a plurality of solar cell groups each including a plurality of solar cells connected in series are also connected in series, the bypass diode can flow a current so as to avoid the solar cell group in which the internal resistance increases due to a decrease in the amount of received light. This reduces heat generation of the solar battery cell.

Further, regarding the solar cell module, it is desired to improve durability so as to be able to be used for a long period of time. Therefore, for example, it is considered to improve the moisture resistance of the solar cell module by sandwiching the photoelectric conversion part between two glass substrates from the front and back sides.

However, even if the durability of the solar cell panel is improved, the terminal box, the bypass diode housed in the terminal box, the cable connected to the terminal box, and the like are likely to deteriorate earlier than the solar cell panel depending on the usage environment, and it is difficult to use the solar cell panel for a long period of time. Therefore, for example, a case is considered in which the terminal box, the bypass diode housed in the terminal box, the cable connected to the terminal box, and the like need to be replaced during long-term use of the solar cell module.

Therefore, there is still room for improvement in the solar cell module and the terminal box for the solar cell module from the viewpoint of easy realization of long-term use.

Therefore, the present inventors have proposed a technique for a solar cell module and a terminal box for a solar cell module, which can be easily used for a long period of time and has a structure that facilitates reuse of the solar cell module.

In contrast, the following describes embodiments with reference to the drawings. In the drawings, the same reference numerals are given to portions having the same structure and function, and redundant description is omitted in the following description. Since the drawings are schematically illustrated, some of the components may be omitted. For example, although the terminal box is shown in a cross-sectional view in fig. 5 (a), 5 (b), 7 (a), 7 (b), 8 (a), 8 (b), 11 (a), 11 (b), 16, 17, and 19, the solar cell panel is shown in a cross-sectional view for convenience. The XYZ coordinate system of the right-handed system is denoted in fig. 1 to 19. In the XYZ coordinate system, the longitudinal direction of the rear surface Sf2 of the solar cell module 1 described later is defined as the + X direction, the short-side direction of the rear surface Sf2 is defined as the + Y direction, and the normal direction of the front surface Sf1 of the solar cell module 1 described later is defined as the + Z direction.

<1 > first embodiment >

<1-1. Structure of solar cell Module >

The solar cell module 1 of the first embodiment will be described based on fig. 1 to 5 (b). As shown in fig. 1 to 3, the solar cell module 1 includes, for example, a solar cell panel 2 and a terminal box 3. The solar cell module 1 includes lead wires W1a, W1b, W1c, W1d, W1e, and W1 f.

As shown in fig. 1 to 5 (b), the solar cell panel 2 includes, for example, a front surface protection member 21, a front surface side sealing material 22, a photoelectric conversion portion 23, a back surface side sealing material 24, and a back surface protection member 25. In the example of fig. 1 to 5 (b), the surface on the + Z direction side of the surface protection member 21 is a surface Sf1 on which external light such as sunlight is irradiated (also referred to as a front surface). In addition, the surface on the-Z direction side of the back surface protection member 25 is a surface (also referred to as a back surface) Sf2 provided on the opposite side to the front surface Sf 1. The frame may be attached to the outer periphery of the solar cell panel 2 connecting the front Sf1 and the back Sf2, or may not be attached to the frame.

The surface protection member 21 can protect the photoelectric conversion portion 23 from the front Sf1 side, for example. The surface protection member 21 has, for example, light transmittance to light having a wavelength in a specific range. As the wavelength in the specific range, for example, a wavelength of light that can be photoelectrically converted by the photoelectric conversion portion 23 is used. As the surface protecting member 21, for example, a plate-like member (also referred to as a first plate-like member) or the like is used. If glass, or a resin such as acrylic or polycarbonate is applied to the material of the first plate-like member, the surface protective member 21 having water-shielding properties and light-transmitting properties with respect to light having a wavelength in a specific range can be realized. Specifically, the surface protection member 21 is, for example, a flat plate-like member having a rectangular shape on both the front and back surfaces and a thickness of about 1mm to 5 mm.

The back surface protection member 25 is provided in a state of facing the front surface protection member 21, for example. The photoelectric conversion portion 23 is present in a region (also referred to as a gap region) G2 between the front surface protection member 21 and the back surface protection member 25. Therefore, the back surface protection member 25 can protect the photoelectric conversion portion 23 from the back surface Sf2 side. The back surface protection member 25 may or may not have optical transparency to light having a wavelength in a specific range, for example. As the back surface protection member 25, for example, a sheet-like member (also referred to as a sheet-like member) or a plate-like member (also referred to as a second plate-like member) having flexibility is used. For example, resin is applied to the material of the sheet member. As the material, shape, and thickness of the second plate-like member, for example, the same material, shape, and thickness as those of the first plate-like member can be used.

The front-surface-side sealing material 22 is provided in a state of covering the photoelectric conversion portion 23 from the surface protection member 21 side, for example, and filling a space between the surface protection member 21 and the photoelectric conversion portion 23. As a material of the front side sealing material 22, for example, a polyester resin such as ethylene-vinyl acetate copolymer (EVA), Triacetylcellulose (TAC), or polyethylene naphthalate, which is excellent in light transmittance with respect to light having a wavelength in a specific range, is applied. The back-surface-side sealing material 24 is provided in a state of covering the photoelectric conversion portion 23 from the back-surface protection member 25 side, for example, and filling a space between the back-surface protection member 25 and the photoelectric conversion portion 23. In other words, the gap region G2 provided between the front surface protection member 21 and the back surface protection member 25 is provided in a state filled with a sealing material in a state covering the photoelectric conversion portion 23, for example. As the material of the back-side sealing material 24, for example, the same material as that of the front-side sealing material 22 can be applied.

The photoelectric conversion unit 23 includes N (N is an integer of 1 or more) solar cells CE2 capable of converting incident sunlight into electricity. As the solar cell CE2, for example, a crystalline solar cell or a thin-film solar cell can be used. In the example of fig. 2 and 3, a solar cell of crystalline silicon is used as the solar cell CE 2. The 24 solar battery cells CE2 are connected in series electrically by the connection conductor T1. Specifically, the photoelectric conversion unit 23 includes 4 solar cell groups Sg1, Sg2, Sg3, and Sg 4. In each of the solar cell groups Sg1, Sg2, Sg3, and Sg4, 6 solar cells CE2 arranged in the + X direction are provided in a state of being electrically connected in series by a connection conductor T1. The 4 solar cell groups Sg1, Sg2, Sg3, and Sg4 are arranged in the + Y direction and are electrically connected in series via the connection conductor T1.

The wires W1a, W1b, W1c, W1d, W1e, W1f are respectively provided from inside the solar cell panel 2 to a region on the surface of the solar cell panel 2. In the examples of fig. 2, 3, 5 (a), and 5 (b), the lead wires W1a, W1b, W1c, W1d, W1e, and W1f are provided from the solar cell panel 2 to the region on the surface of the solar cell panel 2 in a state of being electrically connected to the solar cell CE 2. Each of the leads W1a, W1b, W1c, W1d, W1e, and W1f is made of a material having excellent conductivity such as copper. For example, copper foil is used as the wires W1a, W1b, W1c, W1d, W1e, and W1 f. For example, if a copper foil covered with solder is used as the leads W1a, W1b, W1c, W1d, W1e, and W1f, soldering of the leads W1a, W1b, W1c, W1d, W1e, and W1f is facilitated. Each of the lead wires W1a, W1b, W1c, W1d, W1e, and W1f is connected to the terminal box 3 provided on the back surface Sf2 through the hole Th1 of the back surface protection member 25, for example. Here, for example, the insulating sheets I1a, I1b, I1c, and I1d may be provided between the wires W1a, W1b, W1c, W1d, W1e, and W1f and the photoelectric conversion portion 23. Thus, short circuits due to contact between the leads W1a, W1b, W1c, W1d, W1e, and W1f and the electrodes of the solar cell CE2 are unlikely to occur.

In the example of fig. 2 and 3, the first wire W1a and the second wire W1b are electrically connected to each other and provided in the solar cell group Sg 1. The third lead wire W1c is electrically connected to the solar cell group Sg2, and the fourth lead wire W1d is electrically connected to the solar cell group Sg 3. Further, the wire W1c and the wire W1d are provided in a state of being electrically connected via a connection conductor T1. Further, for example, insulators such as polyethylene terephthalate (PET) are interposed at the intersection of the lead wire W1b and the connection conductor T1 and at the intersection of the lead wire W1e and the connection conductor T1, respectively. Thereby, the wires W1b, W1e and the connection conductor T1 are insulated from each other. The fifth wire W1e and the sixth wire W1f are electrically connected to each other and provided in the solar cell group Sg 4. The 6 wires W1a, W1b, W1c, W1d, W1e, and W1f may be inserted into the respective holes Th 1. In addition, 2 or more of 6 wires W1a, W1b, W1c, W1d, W1e, and W1f may be inserted into one hole portion Th 1. Each hole Th1 is sealed with a sealing material such as a butyl resin or a polyisopropylene resin in a state where a lead wire W1a, W1b, W1c, W1d, W1e, or W1f is inserted therethrough.

The terminal box 3 is a member called a so-called junction box. As shown in fig. 1 and the like, the terminal box 3 is provided in a state of being fixed to the surface of the solar cell panel 2. In the example of fig. 1 to 5 (b), 4

terminal boxes

3a, 3b, 3c, and 3d are provided in a state of being fixed to the back surface Sf2 of the solar cell panel 2. Each of the

terminal boxes

3a, 3b, 3c, and 3d may be fixed to the back surface Sf2 by adhesion using, for example, a silicon-based adhesive or the like. As shown in fig. 1, an output cable C1 for outputting the electricity generated by the photoelectric conversion unit 23 is provided in the

terminal boxes

3a and 3d in an electrically connected state. In the example of fig. 1, the output cable C1a is provided in the terminal box 3a in an electrically connected state. In the terminal box 3a, the cable C1a and the wire W1a are provided in an electrically connected state. The output cable C1d is provided in the terminal box 3d in an electrically connected state. In the terminal box 3d, the cable C1d and the wire W1f are provided in an electrically connected state. Here, for example, when the cable C1a is a positive cable, the cable C1d is a negative cable. For example, when the cable C1a is a negative cable, the cable C1d is a positive cable.

<1-2. terminal box >

The

terminal boxes

3b and 3c will be described based on fig. 4, fig. 5 (a), and fig. 5 (b). The terminal case 3b has the same structure as the terminal case 3 c. Therefore, the terminal box 3b will be described as an example.

As shown in fig. 4, 5 (a), and 5 (b), terminal box 3b includes base portion 31 and main body portion 32.

The base portion 31 is provided on the surface of the solar cell panel 2. As shown in fig. 4, 5 (a), and 5 (b), the base body portion 31 has a first portion P1, a second portion P2, and a first terminal portion Tm 1.

The first portion P1 is provided in a state of being fixed on the surface of the solar cell panel 2. Here, for example, in a state before the terminal box 3b is fixed to the solar cell panel 2, the first portion P1 includes a bottom surface for fixing to the surface of the solar cell panel 2. In the examples of fig. 4, 5 (a), and 5 (b), first portion P1 is provided in a state of surrounding the opening on the back surface Sf2 side in hole portion Th1 of back surface protection member 25. Here, the first portion P1 has a ring shape. The first portion P1 is fixed to the back surface Sf2 of the back surface protection member 25 with, for example, a silicon adhesive Ad 1.

The second portion P2 is provided in a state of protruding from the first portion P1 in a first direction (the-Z direction in the first embodiment) away from the surface of the solar cell panel 2. Here, for example, in a state before the terminal box 3b is fixed to the solar cell panel 2, the second portion P2 is provided in a state of protruding from the first portion P1 in the first direction (-Z direction) facing opposite to the bottom surface of the first portion P1. The second portion P2 includes an annular region Sl1 (also referred to as a first annular region), and an engaged portion En1 provided along the first annular region Sl 1. In the examples of fig. 4, 5 (a), and 5 (b), the first annular region Sl1 has a cylindrical shape centered on a virtual axis Ax2 along the first direction (-Z direction). The engaged portion En1 is provided along the outer peripheral portion of the first annular region Sl 1. In other words, the engaged portion En1 has a form of external thread. In the second portion P2, the portion on the + Z direction side is provided in an open state. The second portion P2 includes a bottom Bt1 provided to close a portion on one side in the-Z direction of the first annular region Sl 1.

In the first embodiment, for example, the first portion P1 and the second portion P2 have an integral structure. In the material of the first portion P1 and the second portion P2, for example, resin or the like is applied. In this case, the first portion P1 and the second portion P2 can be formed by, for example, integrally molding a resin.

In the first terminal portion Tm1, the wires W1b, W1c are disposed in an electrically connected state. Here, for example, in a state before the terminal box 3b is fixed to the solar cell panel 2, the first terminal portion Tm1 is a portion for electrical connection with the lead wires W1b, W1 c. Therefore, for example, after the solar cell panel 2 is manufactured, it is possible to connect the wires W1b, W1c with the first terminal portion Tm1 and mount the base body portion 31 on the surface of the solar cell panel 2. The first terminal portion Tm1 is made of an electrical conductor such as a metal, for example. In the examples of fig. 5 (a) and 5 (b), the first terminal portion Tm1 is provided in a state of penetrating the bottom Bt1 of the second portion P2. Also, in the inner space of the second section P2, the wires W1b, W1c are provided in an electrically connected state in the first terminal portion Tm 1.

The body portion 32 is provided in the base portion 31 in a state of being engaged with the base portion 31. As shown in fig. 4, 5 (a), and 5 (b), the main body portion 32 has a third portion P3 and a fourth portion P4.

The third portion P3 is provided in a state where a closed space Sc1 is formed in cooperation with the base portion 31. In other words, by fitting the body portion 32 to the base portion 31, the third portion P3 can form the closed space Sc1 in cooperation with the base portion 31. The third portion P3 has, for example, a cup-like shape including a cylindrical side Sp1 and a circular bottom Bt 2. A portion (also referred to as a terminal-containing portion) including the second terminal portion Tm2 is housed in the closed space Sc 1. In addition, within the closed space Sc1, the second terminal portion Tm2 is provided in a state of being in contact with the first terminal portion Tm 1. In other words, in the closed space Sc1, a portion in which the terminal containing portion including the second terminal portion Tm2 and the second terminal portion Tm2 of the first terminal portion Tm1 are provided in a state of contact is housed. Here, for example, a portion of the first terminal portion Tm1, which is provided in a state of protruding from the bottom Bt1 to the-Z direction, is in contact with the second terminal portion Tm 2. The terminal-containing portion may include, for example, a diode Bd1 described later.

The diode Bd1 is a member called a so-called bypass diode. For example, in any one of the group of solar cell groups Sg1 and Sg2 in the series connected state and the group of solar cell groups Sg3 and Sg4 in the series connected state, the internal resistance may increase due to a decrease in the amount of received light. In the above case, in order to avoid heat generation of the solar cell CE2, the diode Bd1 can flow a current so as to avoid the solar cell group of the group having a high internal resistance. In the first embodiment, the second terminal portion Tm2 is an electrode provided in a state of being exposed to the outside in the diode Bd 1. In the examples of fig. 4, 5 (a), and 5 (b), the second terminal portion Tm2 is a portion provided in a recessed state so that the first terminal portion Tm1 fits in. The second terminal portion Tm2 is made of a conductor such as a metal, for example, similarly to the first terminal portion Tm 1.

The fourth portion P4 includes an annular region Sl2 (also referred to as a second annular region), and an engaging portion En2 provided along the second annular region Sl 2. In the examples of fig. 5 (a) and 5 (b), the second annular region S12 has a cylindrical shape centered on a virtual axis Ax2 along the first direction (-Z direction). The engagement portion En2 is provided along the inner peripheral portion of the second annular region S12. In other words, the engaging portion En2 has an internal thread form. The engaging portion En2 is engaged with the engaged portion En1 in a rotatable and detachable state. Therefore, the body portion 32 is detachable from the base portion 31. As shown in fig. 5 (b), in a state where the terminal box 3b is completed, the engaging portion En2 is provided in a state where it is engaged with the engaged portion En1 in a rotatable and detachable state with respect to the engaged portion En 1. At this time, for example, the base portion 31 and the body portion 32 are brought into close contact with each other by the engagement between the engaging portion En2 and the engaged portion En 1. Thus, for example, the closed space Sc1 can be formed by the base portion 31 and the body portion 32.

With the above-described configuration, for example, after the solar cell panel 2 is manufactured, the base body portion 31 is attached to the surface of the solar cell panel 2, and the main body portion 32 is rotated to be engaged with the base body portion 31, whereby the terminal box 3b can be completed. This makes it possible to easily attach the terminal box 3b to the solar cell panel 2, for example. For example, the main body 32 can be detached from the base portion 31 fixed to the solar cell panel 2 by rotating the main body. Therefore, for example, the main body portion 32 can be easily replaced. Thus, for example, the solar cell module 1 and the terminal box 3b for the solar cell module 1 can be easily used for a long period of time. In the solar cell module 1, the solar cell module 1 can be repaired and regenerated by replacing the main body portion 32 of the terminal box 3b, thereby contributing to reuse of the solar cell module 1. In addition, for example, the main body portion 32 may be mounted to the base portion 31 by the engagement of the engaging portion En2 and the engaged portion En1 at a portion different from a portion where the first terminal portion Tm1 and the second terminal portion Tm2 are provided in a connected state. Thus, for example, a load due to an external force or the like is not easily applied to a portion where the first terminal portion Tm1 and the second terminal portion Tm2 are in a connected state.

Here, if the terminal-containing portion includes the diode Bd1, for example, the diode Bd1 functioning as a bypass diode for the solar cell module 1 may be detachably provided to the base member 31. Thus, for example, the body portion 32 is rotated and detached from the base portion 31, so that the diode Bd1 can be easily replaced. As a result, for example, in the solar cell module 1, a failure due to deterioration of the diode Bd1 is easily eliminated.

Here, for example, the diode Bd1 as the terminal-containing portion may be provided in a state of being in contact with the third portion P3 in the first direction (-Z direction). In this case, for example, when the main body portion 32 is attached to the base portion 31, the second terminal portion Tm2 can be pressed against the first terminal portion Tm1 by pressing the main body portion 32 against the base portion 31. Therefore, for example, without using a special jig or the like, the electrical connection between the first terminal portion Tm1 and the second terminal portion Tm2 can be easily and accurately achieved.

<1-3 > summary of the first embodiment

In the solar cell module 1 and the

terminal boxes

3b and 3c according to the first embodiment, for example, after the solar cell panel 2 is manufactured, the base body portion 31 can be attached to the surface of the solar cell panel 2, and the main body portion 32 can be rotated to be engaged with the base body portion 31. This makes it possible to easily attach the terminal box 3b to the solar cell panel 2, for example. For example, the main body 32 can be detached from the base portion 31 fixed to the solar cell panel 2 by rotating the main body. Therefore, for example, the main body portion 32 can be easily replaced. This makes it possible to easily realize long-term use of the solar cell module 1 and the terminal box 3b for the solar cell module 1, for example.

<2 > other embodiments

The present invention is not limited to the first embodiment described above, and various changes, modifications, and the like may be made without departing from the scope of the present invention.

<2-1 > second embodiment

In the first embodiment, the terminal box 3b may be used as a basic configuration, and may be changed to a terminal box 3bA having a projection Pr1 provided in a state of being fitted into a hole Th1, as shown in fig. 6, 7 (a), and 7 (b), for example. Specifically, for example, terminal box 3bA may include base portion 31A, and base portion 31A may have a structure in which protrusion Pr1 is added to base portion 31 of terminal box 3 b. In the examples of fig. 6, 7 (a), and 7 (b), the projection Pr1 is an annular portion provided so as to project in the + Z direction from the + Z side portion of the base portion 31A. For example, projection Pr1 can be fitted into hole Th1 by being inserted along the inner periphery of hole Th 1.

Here, for example, if the rear surface protection member 25 is a plate-shaped member (second plate-shaped member) having the hole portion Th1 provided so as to penetrate in the second direction (+ Z direction) opposite to the first direction (-Z direction), the convex portion Pr1 is fitted in the hole portion Th1 by attaching the base portion 31A to the rear surface protection member 25. Thus, for example, the base portion 31A can be firmly fixed to the plate-shaped rear surface protection member 25. As a result, for example, even if any of an external force when the main body portion 32 is rotated to engage with the base portion 31A and an external force due to contact of a tool or a jig during installation of the solar cell module 1 acts on the base portion, the base portion 31A is not easily detached from the rear surface protection member 25. Further, for example, the attachment position of the base portion 31A to the rear surface protection member 25 can be easily determined by the operation of fitting the projection Pr1 of the base portion 31A to the hole Th1 of the rear surface protection member 25.

<2-2. third embodiment >

In each of the above embodiments, the above-described terminal boxes 3B and 3bA may be used as basic configurations, and as shown in fig. 8 (a) and 8 (B), for example, the terminal box 3bB may be modified to further include a spacer member Pk1 provided in a state of closing the gap between the base portion 31B and the body portion 32B. As the material of the cushioning member Pk1, for example, a material that can elastically deform and has excellent weather resistance, such as butyl rubber, is used. With such a configuration, for example, moisture is less likely to enter terminal box 3bB through the gap between base portion 31B and main body portion 32B.

Here, for example, as shown in fig. 8 (a) and 8 (B), the base portion 31B may have a configuration in which the base portion 31A is a basic configuration and a ring-shaped portion (also referred to as a ring-shaped protruding portion) Pr2 provided in a state of protruding toward the body portion 32B is added. In the examples of fig. 8 (a) and 8 (b), the annular projecting portion Pr2 is provided along the outer peripheral portion of the surface on the-Z direction side of the bottom Bt 1. At this time, as shown in fig. 8 (a) and 8 (B), for example, main body portion 32B may have a basic structure of main body portion 32, and may have a structure in which an annular portion (also referred to as an annular holding portion) Hp1 provided in a state of holding pad member Pk1 is added. In the examples of fig. 8 (a) and 8 (b), the annular holding portion Hp1 is provided along the inner peripheral surface of the cylindrical side portion Sp 1. At this time, for example, the packing member Pk1 may be provided in a state of abutting on the annular projecting portion Pr 2. Here, for example, the pad member Pk1 is held in the body portion 32B. Therefore, for example, by detaching the body portion 32B from the base portion 31B and attaching a new body portion 32B to the base portion 31B, the cushioning member Pk1 can be easily replaced.

Here, for example, as shown in fig. 8 (a) and 8 (b), the ring-shaped holding portion Hp1 may be a ring-shaped portion (also referred to as a ring-shaped concave portion) Cg1 provided so as to be recessed in the first direction (-Z direction). At this time, for example, the packing member Pk1 may be provided in the annular recess Cg 1. For example, the annular projecting portion Pr2 may be provided in a state of abutting against the pad member Pk1 in the annular recess Cg 1. With the above-described configuration, for example, when the body portion 32B is mounted on the base portion 31B, the positioning of the body portion 32B with respect to the base portion 31B can be easily performed by the work of inserting the annular projecting portion Pr2 into the annular recess Cg 1.

<2-3 > fourth embodiment

In each of the above embodiments, the terminal boxes 3b, 3bA, and 3bB may be used as basic components, and may be changed to a terminal box 3bC in which the third portion P3, the diode Bd1 as a terminal-containing portion, and the fourth member P4 are integrally formed, as shown in fig. 11 (a) and 11 (b), for example. Here, the third portion P3 may be integrally formed with the diode Bd1 or the fourth portion P4 may be integrally formed with the diode Bd1 by one or more of various methods such as bonding, adhering, coupling, engaging, fitting, and fastening. Here, as shown in fig. 9 (a) and 9 (b), for example, terminal box 3bC includes base portion 31C and main portion 32C. The base portion 31C is a basic structure of the base portion 31B and is modified as follows: in a case of a top perspective view in a second direction (+ Z direction) opposite to the first direction (-Z direction), the first terminal portion Tm1C is provided along a circular imaginary line Vc1 centered on an imaginary axis Ax 2. The main body portion 32C is modified in the following manner with the basic configuration of the main body portion 32B: the second terminal portion Tm2C is disposed along a circular imaginary line Vc1 centered on an imaginary axis Ax2 in a top perspective view in the first direction (-Z direction). At this time, for example, the fourth portion P4 may be provided so as to be rotatable about the virtual axis Ax2 with respect to the second portion P2.

With such a configuration, for example, when the main body portion 32C is rotated about the virtual axis Ax2, a large moment of force can be generated in the second terminal portion Tm 2C. Thereby, for example, by the structure in which the first terminal portion Tm1C is firmly contacted or fitted with the second terminal portion Tm2C, the first terminal portion Tm1C and the second terminal portion Tm2C can be electrically connected more reliably. As a result, for example, even if the electric power generated by the solar cell panel 2 becomes high, a failure such as arc spattering is not easily generated at the contact portion between the first terminal portion Tm1C and the second terminal portion Tm2C due to a high resistance.

Here, for example, as shown in fig. 9 a, 10 a, 11 a, and 11 b, the first terminal portion Tm1C may have a basic structure of the first terminal portion Tm1 and be changed to a terminal portion provided in a bent state (also referred to as a bent terminal portion). At this time, the first terminal portion Tm1C has, for example, a first plate-like portion Pl1 provided in a state of extending along the first direction (-Z direction), and a second plate-like portion P12 provided in a state of extending from the first plate-like portion Pl1 in a folded manner. In the examples of fig. 9 (a), 10 (a), 11 (a), and 11 (b), the first terminal portion Tm1C has the third plate-like portion Pl3 including the hole portion Th2 for fastening to the bottom Bt1, and the fourth plate-like portion P14 provided in a state of penetrating the bottom Bt 1.

Here, for example, as shown in fig. 9 (b), 10 (b), 11 (a), and 11 (b), the second terminal portion Tm2C may be modified to include the locked terminal portion Fk1 with the second terminal portion Tm2 as a basic configuration. At this time, the locked terminal portion Fk1 is, for example, in a state of being in contact with the first plate-like portion Pl1, and is provided in a state of being locked by the second plate-like portion P12 in the first direction (-Z direction). For example, the first terminal portion Tm1C and the second terminal portion Tm2C are provided in a state where the other second terminal portion Tm2C is latched by the first terminal portion Tm1C in a bent state. With the above configuration, the body portion 32C can be firmly fixed to the base portion 31C.

In addition, in the examples of fig. 9 (b), 10 (b), 11 (a), and 11 (b), the second terminal portion Tm2C has the fixed portion Fx1C, the fifth plate-like portion P15, and the connecting portion Cl 1. The fixed portion Fx1C is a portion provided in a state of being fixed to the bottom Bt2 of the third portion P3. The fifth plate-like portion P15 is a portion provided in a state of extending and protruding from the fixed portion Fx 1C. In addition, the fifth plate-like portion P15 has a hole portion Th3 for fastening to the bottom Bt2 of the third portion P3. The connecting portion Cl1 is a plate-shaped portion that is bent in a U shape when viewed from above in the first direction (-Z direction). The connecting portion Cl1 is formed with a gap portion GP 2. Here, when the fourth portion P4 is rotated about the imaginary axis Ax2 with respect to the second portion P2, the first plate-like portion Pl1 of the first terminal portion Tm1C is inserted into the gap portion GP2, and the first plate-like portion Pl1 is fitted to the connecting portion Cl 1. At this time, the connecting portion Cl1 becomes the locked terminal portion Fk1 in the state of being locked by the second plate-like portion Pl2 in the first direction (-Z direction). In the examples of fig. 9 (b), 11 (a), and 11 (b), the annular holding portion Hp1C has the above-described annular holding portion Hp1 as a basic structure, and the annular recessed portion Cg1 in a state of holding the pad member Pk1 is changed to a step portion along the inner peripheral portion of the cylindrical side portion Sp 1.

Here, for example, the structure of the first terminal portion Tm1C may be replaced with the structure of the second terminal portion Tm 2C. In other words, it is also possible that the second terminal portion Tm2C includes a bent terminal portion, and the first terminal portion Tm1C includes the locked terminal portion Fk 1. At this time, for example, the locked terminal portion Fk1 may be set in a state of being in contact with the first plate-like portion Pl1 and locked by the second plate-like portion Pl2 in a second direction (+ Z direction) opposite to the first direction (-Z direction).

<2-4 > fifth embodiment

In each of the above embodiments, for example, the terminal box 3 may be changed to a terminal box 3D having a basic configuration, which is provided in a state of being electrically connected to the lead wires W1a, W1f and includes the base portion 31D of the cable C1(C1a, C1D) shown in fig. 12. With such a configuration, even when the cable C1 and the diode Bd1 are included in the terminal box 3D, for example, when the cable C1 is continuously used and the terminal-containing portion such as the diode Bd1 is replaced, the portion to be replaced is reduced. This makes it possible to easily perform repair for long-term use of the terminal box 3, for example.

In the example of fig. 12, two body portions 32bD, 32cD are provided in a state of being engaged with one base portion 31D. Here, the one base body portion 31D has a first portion P1D for fixing to the solar cell panel 2 and two second portions P2, and the two second portions P2 each include an engaged portion En1 provided in a state where the two main body portions 32bD, 32cD are engaged with each other. Here, the main body portion 32bD has a fourth portion P4 including an engaging portion En2, which is provided rotatably about a virtual axis Ax2b extending in the first direction (-Z direction). Here, the main body portion 32cD has a fourth portion P4 including an engaging portion En2, which is provided rotatably about a virtual axis Ax2c extending in the first direction (-Z direction).

<2-5 > sixth embodiment

In the first to fourth embodiments, the basic configuration of the terminal boxes 3b, 3bA, 3bB, and 3bC may be changed to a terminal box 3E having a main body 32E provided in a state where the cable C1 can be attached and detached, as shown in fig. 13, for example. In this case, the second terminal portions Tm2, Tm2C may also be provided in a state of being electrically connected to the cable C1. At this time, the terminal containing portion is a portion including the second terminal portions Tm2, Tm2C provided in a state of being electrically connected to the cable C1. In the example of fig. 13, the terminal case 3E includes a base portion 31E and a main body portion 32E. The base portion 31E is a member having a basic structure of the base portion 31C described above and in which the number of the first terminal portions Tm1C is increased from 2 to 4. The main body portion 32E has the basic configuration of the main body portion 32C, and has a configuration in which a connection portion At2a in which the terminal At1a of the cable C1a is detachably attached and a connection portion At2d in which the terminal At1d of the cable C1d is detachably attached are added.

By thus enabling the cable C1 to be attached to and detached from the main body portion 32E, for example, when only the cable C1 needs to be replaced, it is possible to replace only the cable C1 and continue using other components. This makes it easier to use the main body portion 32E and the solar cell module 1 for a long period of time.

<2-6 > seventh embodiment

In each of the above embodiments, for example, as shown in fig. 14, fig. 15 (a), and fig. 15 (b), the engaged portion En1 and the engaging portion En2 may be engaged with each other in another manner. In other words, the engaged portion En1 and the engaging portion En2 are not limited to the engaging method based on the rotation of the male screw and the female screw, and may have other methods for achieving the engagement. Specifically, for example, the following method may be adopted: the body portion 32F is pushed in the + Z axis direction while being covered with the base portion 31F, and is rotated by a predetermined angle smaller than 360 degrees, whereby the engaged portion En1 is engaged with the engaging portion En 2. In the examples of fig. 14, 15 (a), and 15 (b), a terminal box 3bF is used in which the base portion 31 is changed to a base portion 31F and the body portion 32 is changed to a body portion 32F, using the above-described terminal boxes 3b, 3bA as a basic configuration. In the base body portion 31F, the engaged portion En1 is provided along a part of the outer peripheral portion of the second portion P2. In the main body portion 32F, the engaging portion En2 is provided along a part of the inner peripheral portion of the fourth portion P4.

With such a configuration, the number of the convex portions required for engaging both the engaged portion En1 and the engaging portion En2 in the Z direction can be set to one. Accordingly, as compared with the case of engagement by rotation of the male screw and the female screw, the widths of both the engaged portion En1 and the engaging portion En2 in the Z direction can be reduced, and the main body portion 32F can be easily reduced in size. Further, since management of the tightening torque necessary for engagement by rotation of the male screw and the female screw is not required, workability of attaching the body portion 32F to the base portion 31F can be improved.

<2-7 > eighth embodiment

In the first to fourth embodiments and the sixth embodiment, a terminal box 3bG in which the

main body portions

32, 32B, 32C, and 32F are changed to, for example, a main body portion 32G shown in fig. 16 may be adopted, and the main body portion 32G incorporates a diode Bd1 as a terminal containing portion. In the example of fig. 16, in the main body portion 32G, the diode Bd1 as a terminal containing portion is in a state of being incorporated in the third portion P3. At this time, the diode Bd1 as the terminal containing portion is integrally configured with the third portion P3. Thus, for example, when the body portion 32G is mounted on the base body portion 31, the second terminal portion Tm2 can be pressed against the first terminal portion Tm1 by pressing the body portion 32G against the base body portion 31. The first terminal portion Tm1 and the second terminal portion Tm2 may have an arc shape that is along the rotational direction of the main body portion 32G when viewed in the first direction (here, the-Z direction). In addition, the following shape may be provided: when the main body portion 32G is rotated with respect to the base portion 31, the first terminal portion Tm1 and the second terminal portion Tm2 can slide with each other along with the rotation. The first terminal portion Tm1 and the second terminal portion Tm2 may have a pair, and each may function as a positive electrode and a negative electrode. In this case, at the end of the rotation of the main body portion 32G, the engaged portion En1 and the engaging portion En2 may be positioned so that the first terminal portion Tm1 and the second terminal portion Tm2, and predetermined positive electrodes and predetermined negative electrodes are combined with each other. As a result, for example, without using a special jig or the like, the electrical connection between the first terminal portion Tm1 and the second terminal portion Tm2 can be easily and accurately achieved.

<2-8 > ninth embodiment

In each of the above embodiments, as shown in fig. 17, for example, terminal box 3bH in which engaged portion En1 is provided along the inner periphery of first annular region Sl1 and engaged portion En2 is provided along the outer periphery of second annular region Sl2 may be used. The example of fig. 17 is an example in which the above-described terminal box 3b is used as a basic configuration and is changed to a terminal box 3bH having a base portion 31H and a body portion 32H. The base section 31H has the basic structure of the base section 31 described above, and is modified as follows: the engaged portion En1 is provided along the inner periphery of the first annular region Sl 1. Specifically, the engaged portion En1 is provided on the inner circumferential surface of the annular groove Cg 2. The main body portion 32H has the basic structure of the main body portion 32 described above, and is modified as follows: the engaging portion En2 is provided along the outer periphery of the second annular region S12.

Even when such a configuration is used, the main body portion 32H can be easily replaced in the terminal box 3bH, and long-term use of the solar cell module 1 can be easily achieved.

<2-9 > tenth embodiment

In each of the above embodiments, a body portion 32I may be used in which the

body portions

32, 32B, 32C, 32bD, 32cD, 32E, 32F, 32G, and 32H have a basic configuration and the third portion P3 and the fourth portion P4 are changed to a separate third portion P3I and fourth portion P4I as shown in fig. 18 and 19, for example. With such a configuration, for example, regardless of the configurations of the first terminal portions Tm1, Tm1C and the second terminal portions Tm2, Tm2C, the number of rotations of the main body portion 32I with respect to the base body 31 can be increased when the main body portion 32I is engaged with the base body 31. This enables, for example, body section 32I to be firmly fixed to base section 31.

Here, as shown in fig. 18 and 19, the third portion P3I includes, for example, a first annular portion Ld1, a second annular portion Sd1, and a stepped portion St 1. The first annular portion Ld1 has an annular outer edge of a first diameter provided on the front surface (here, the back surface Sf2) side of the solar cell panel 2 with respect to the second annular portion Sd 1. In the example of fig. 18 and 19, the first annular portion Ld1 is a cylindrical portion (also referred to as a first cylindrical portion) centered on a virtual axis Ax2 extending in the first direction (-Z direction). The second annular portion Sd1 is provided on the first direction (-Z direction) side of the first annular portion Ld1, and has a second diameter smaller than the first diameter. In the example of fig. 18 and 19, the second annular portion Sd1 is a cylindrical portion (also referred to as a second cylindrical portion) centered on the virtual axis Ax 2. The step portion St1 is provided in a state of connecting the first annular portion Ld1 and the second annular portion Sd 1. In the example of fig. 18 and 19, the step portion St1 has a wheel-like disc shape provided along a virtual plane orthogonal to the virtual axis Ax 2.

Further, the fourth portion P4I includes a hole portion Th4, a pressing portion Fl1, and a cylindrical portion Sl 3I. In the example of fig. 18 and 19, the cylindrical portion Sl3I is a cylindrical portion centered on the virtual axis Ax 2. When the irregularities are formed on the outer peripheral surface of the cylindrical portion Sl3I, the user can easily rotate the cylindrical portion Sl3I with the hand. Hole Th4 is provided in a state where second ring portion Sd1 is inserted therethrough. Pressing portion Fl1 presses step portion St1 in a second direction (+ Z direction) opposite to the first direction (-Z direction) around hole portion Th 4. The cylindrical portion S13I is provided in a state of extending from the pressing portion Fl1 in the second direction (+ Z direction) along the outer peripheral portion Op1I of the first annular portion Ld 1. Further, the cylindrical portion S13I has an engagement portion En 2. In the example of fig. 18 and 19, the engaging portion En2 is provided along the inner periphery of the cylindrical portion Sl 3I.

<3. others >

In each of the above embodiments, for example, the diode Bd1 as the terminal containing portion may be provided in a state of being separated from the third portion P3 in the first direction (-Z direction).

In each of the above embodiments, for example, if the front surface protection member 21 has a portion (also referred to as an extended protruding portion) that is provided in a state of extending and protruding further than the rear surface protection member 25 in the direction along the XY plane, the terminal box 3 may be provided in a state of being fixed to the extended protruding portion.

In each of the above embodiments, for example, the engaged portion En1 and the engaging portion En2 may have a form in which a convex portion and a concave portion are engaged, or may have a form in which a convex portion and a convex portion are engaged.

In the first embodiment and the third to tenth embodiments, for example, the back surface protection member 25 may not be a plate-shaped member but may be a sheet-shaped member having flexibility.

In the sixth embodiment, the terminal-containing member may include, for example, one or both of the diode Bd1 including the second terminal portions Tm2 and Tm2C and the portions including the second terminal portions Tm2 and Tm2C connected to the cable C1.

In the tenth embodiment, for example, a slit or the like extending in the first direction (-Z direction) may be provided in the cylindrical portion S13I so as to be partially cut in the circumferential direction.

Needless to say, all or a part of the contents constituting each of the above embodiments and various modifications may be appropriately combined within a range not inconsistent with each other.

Description of reference numerals:

1 solar cell module

2 solar cell panel

3. 3a, 3b, 3bA, 3bB, 3bC, 3bF, 3bG, 3bH, 3c, 3D, 3D, 3E terminal box

23 photoelectric conversion part

25 rear surface protection member

31. 31A, 31B, 31C, 31D, 31E, 31F, 31H base parts

32. 32B, 32C, 32E, 32F, 32G, 32H, 32I, 32bD, 32cD body section

Ax2, Ax2b and Ax2c shafts

Bd1 diode (terminal with part)

C1, C1a and C1d cable

CE2 solar cell unit

Cg1 annular recess

Cg2 slot part

En1 clamped portion

En2 Snap-in portion

Fk1 locked terminal part

Fl1 pressing part

Hp1, Hp1C Ring-like holding moiety

Ld1 first annular part

Op1I peripheral part

P1, P1D first part

Second part of P2

P3, P3I third part

Fourth parts P4, P4I

Pk1 pad member

Pl1 first plate-like part

Pl2 second plate-like part

Pr1 convex part

Pr2 Ring projection

Sc1 closed space

Sd1 second annular part

Sf2 back surface

Sl1 first annular region

Sl2 second annular region

Sl3I cylindrical part

Sp1 side part

St1 step

Th1, Th2, Th3 and Th4 pore parts

Tm1, Tm1C first terminal portion

Tm2, Tm2C second terminal portion

Vc1 imaginary line

W1a, W1b, W1c, W1d, W1e, W1f wires

Claims

1. A solar cell module, wherein,

the solar cell module is provided with:

a solar cell panel including a solar cell unit; and

a terminal box provided on a surface of the solar cell panel,

the terminal box has:

a base portion disposed on the surface; and

a main body section provided on the base section in a state of being engaged with the base section,

the base portion has:

a first portion disposed on the surface;

a second portion provided in a state of protruding from the first portion in a first direction away from the surface, and including an engaged portion provided along an annular region; and

a first terminal portion to which a lead wire is provided in an electrically connected state, the lead wire being provided from within the solar cell panel to a region on the surface in an electrically connected state with the solar cell unit,

the main body portion has:

a third portion provided in a state of forming a closed space with the base portion, the closed space accommodating a terminal containing portion including a second terminal portion and a portion of the first terminal portion provided in a state of being in contact with the second terminal portion; and

a fourth portion including an engaging portion provided along an annular region in a state of being engaged with the engaged portion in a rotatable and detachable state,

the third section includes:

a first annular portion provided on the front surface side and having an annular outer edge of a first diameter;

a second annular portion that is provided on the first direction side of the first annular portion and has a second diameter smaller than the first diameter; and

a stepped portion provided in a state of connecting the first annular portion and the second annular portion,

the fourth section includes:

a hole portion through which the second annular portion is inserted;

a pressing portion provided around the hole portion in a state of pressing the stepped portion in a second direction opposite to the first direction; and

and a cylindrical portion provided to extend from the pressing portion in the second direction along an outer peripheral portion of the first annular portion, and having the engaging portion.

2. The solar cell module of claim 1,

the terminal containing portion is integrally configured with the third portion, or the terminal containing portion is provided in a state of being in contact with the third portion in the first direction.

3. The solar cell module according to claim 1 or 2,

the solar cell panel includes a plate-shaped member having a hole provided in a state of penetrating in the second direction,

the base portion has a projection provided in a state of being fitted in the hole portion.

4. The solar cell module according to claim 1 or 2,

the solar cell module further includes a spacer member provided to close a gap between the base portion and the main body portion.

5. The solar cell module of claim 4,

the base portion has an annular projecting portion provided in a state of projecting toward the main body portion,

the main body portion has an annular holding portion provided in a state of holding the pad member,

the pad member is provided in contact with the annular protruding portion.

6. The solar cell module of claim 5,

the annular holding portion includes an annular recess provided in a state of being recessed toward the first direction,

the gasket member is disposed within the annular recess,

the annular protruding portion is provided in a state of being in contact with the pad member in the annular recess.

7. The solar cell module according to claim 1 or 2,

the terminal containing portion includes a diode.

8. The solar cell module according to claim 1 or 2,

the base portion has an output cable provided in an electrically connected state with the lead wire.

9. A terminal box for a solar cell module, wherein,

the terminal box for a solar cell module comprises a base body and a main body detachable from the base body,

the base portion has:

a first portion including a bottom surface for being disposed on a surface of a solar cell panel including a solar cell unit;

a second portion provided in a state of protruding from the first portion in a first direction opposite to the bottom surface, and including an engaged portion provided along an annular region; and

a first terminal portion for electrical connection with a lead wire that is provided from within the solar cell panel to a region on the surface in a state of being electrically connected with the solar cell unit,

the main body portion has:

a third portion capable of forming a closed space with the base body portion by attaching the body portion to the base body portion, the closed space accommodating a terminal containing portion including a second terminal portion and a portion of the first terminal portion provided in a state of being in contact with the second terminal portion; and

a fourth portion including an engaging portion provided along an annular region and engaged with the engaged portion so as to be rotatable and detachably engaged with the engaged portion,

the third section includes:

a first annular portion having an annular outer edge of a first diameter located on the bottom surface side by fitting the main body portion to the base portion;

a second annular portion that is located on the first direction side of the first annular portion by fitting the body portion to the base portion, and that has a second diameter smaller than the first diameter; and

the fourth section includes:

a hole portion through which the second annular portion is inserted by attaching the main body portion to the base portion;

a pressing portion provided in a state where the step portion is pressed in a second direction opposite to the first direction around the hole portion by attaching the main body portion to the base portion; and

and a cylindrical portion that is provided in a state of extending from the pressing portion in the second direction along an outer peripheral portion of the first annular portion by attaching the main body portion to the base portion, and that has the engaging portion.