JP3775429B2 - Terminal box device for solar cell module - Google Patents

Description

  The present invention relates to a solar cell module terminal box device used for a solar cell module disposed on a roof of a house or the like.

  2. Description of the Related Art Conventionally, a solar power generation system that performs solar power generation by arranging a plurality of solar battery modules in a matrix on a house roof or the like is generally known.

  In such a solar power generation system, each solar cell module includes a terminal box device for connection that connects the solar cell module to another solar cell module.

  For example, FIG. 15 shows a schematic configuration diagram of the solar cell module 1, and has a configuration in which a large number of solar cells 3 (cell group 4) electrically connected in series are laid on the surface.

  A terminal box device 5 is disposed on the back side of the module main body 1a in the solar cell module 1. As shown in FIG. 17, the terminal box device 5 accommodates a bypass diode 6 as a bypass rectifier in the terminal box device 5. The bypass diode 6 is connected to the parallel output voltage of the cell group 4. It has a configuration in which the current of the cell group 4 (or module 1) that is connected in the reverse direction and is reverse-biased is bypassed.

  As shown in FIG. 16, the solar cell module 1 is configured such that one of the module connection cables 7 drawn out from the terminal box device 5 attached to the back surface of the module connection cable 7 of the other solar cell module 1 is connected. The other side can be connected to each other, and thus, a plurality of solar cell modules 1 arranged in parallel on the roof or the like can be sequentially connected in series.

  And when taking out electric power from each solar cell module 1, these are electrically connected as shown in the block diagram of FIG. 17, the solar power generation system 9 is comprised, and the several solar cell module 1 connected in series is comprised. It is configured to be connected to the inverter or the junction box 10 and converted into an alternating current and taken out.

  Further, as shown in FIG. 18, the terminal box device 5 includes a box housing 12 formed of synthetic resin or the like, and the box housing 12 has a substantially rectangular shape with an open upper surface having a housing recess therein. It is mainly composed of a box main body 12a having a case structure, and a plate-like lid (not shown) attached to the upper surface side with the accommodating concave portion being closed.

  The box body 12a is provided with a wiring hole 13 as a frame insertion hole along one edge on the bottom surface, and a pair of outputs (on the left and right edges in the figure) are provided on the side wall of the opposite edge. Cable insertion holes 14 are formed through which the module connecting cables 7 for extraction are respectively inserted.

  In addition, a plurality of terminal fixing portions (not shown) are arranged in parallel in the left-right direction so as to protrude from the bottom surface in the middle portion between the wiring hole 13 and each cable fitting hole 14 in the box body 12a. The connection terminals 15 each having a substantially T shape in plan view are mounted on the parts by thermal crushing or the like. At this time, the protruding portions on both sides of the connection terminal 15 are arranged along the horizontal direction in the figure, and the protruding portion at the center is arranged in a protruding shape in the direction of the wiring hole 13.

  And each edge part of the several connector (lead frame) (not shown) from the photoelectric conversion element of the solar cell module 1 is each inserted in the box housing | casing 12 through the wiring hole 13, and respond | corresponds. Each is soldered to the center overhanging portion of the connection terminal 15.

  Further, the connection terminals 16 that are caulked and connected to the end portions of the module connecting cables 7 that are fitted through the respective cable fitting holes 14 are connected to the connection terminals 15 at both ends by fastening screws 17, and further adjacent to each other. The bypass diodes 6 are soldered between the right and left projecting portions of the respective connecting terminals 15. Here, as the bypass diode 6, a mold type diode in which a lead pin is drawn out is used, and the lead pin is soldered to each protruding portion. And it is set as the structure which can exhibit a bypass function by connecting each bypass diode 6 so that it may become a reverse direction with the parallel output voltage of the photoelectric conversion element of each solar cell module 1. FIG.

  In recent years, the solar cells 3 tend to be large, and the current output from the solar cells 3 tends to be large.

  On the other hand, in the case of a crystalline solar cell 3, if it is covered with leaves or the like, the bypass diode 6 used in the bypass circuit generates heat and causes a temperature rise, and the temperature of the bypass diode 6 increases as the output current increases. The rise is also high, and there is a risk of impairing the life of the peripheral members.

  SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a solar cell module terminal box device that is improved in durability and thus in long-term reliability by improving the heat dissipation effect.

In order to solve the above-mentioned problems, a first aspect of the present invention is a box housing attached to a solar cell module, and a plurality of connectors disposed in the box housing from photoelectric conversion elements of the solar cell module. A plurality of connection terminals connected to each other, a pair of output extraction module connecting cables connected to the corresponding connection terminals and having the other end drawn out of the box housing, and disposed between the adjacent connection terminals In the solar cell module terminal box device comprising a plurality of bypass rectifier elements, the bypass rectifier elements are arranged in a staggered manner between the bypass rectifier elements arranged adjacent to each other. A heat insulating partition wall made of a heat insulating material for partitioning the bypass rectifying elements is provided .

The invention according to claim 2 is a plurality of box housings attached to the solar cell module, and a plurality of connectors arranged in the box housing and connected to a plurality of connectors from the photoelectric conversion elements of the solar cell module. A plurality of bypass rectifiers disposed across the connection terminals, a pair of output extraction module connecting cables connected to the corresponding connection terminals and having the other end drawn out of the box housing, and the adjacent connection terminals In the terminal box device for a solar cell module provided with an element, the arrangement of the bypass rectifying elements is arranged in a staggered manner, and the bypass rectifying element includes a rectifying element body formed in a chip shape, Each of the lead plates includes a pair of lead plates disposed on the upper surface and the lower surface of the rectifying element body and extending in parallel to each other and in opposite directions. A wide heat dissipating part is provided on the installation side, and each heat dissipating part is connected to a heat dissipating part receiving piece overhanging each connection terminal in a superposed state, and the heat dissipating part receiving piece in the rectifying element body is The lead plate disposed on the side connected in a state is characterized in that the heat radiating portion receiving piece is formed so as to extend to a position corresponding to the rectifying element body and connected in a superposed state .

According to a third aspect of the present invention, in the terminal box device for a solar cell module according to the first aspect , the bypass rectifying element includes a chip-shaped rectifying element body, and upper and lower surfaces of the rectifying element body. And a pair of lead plates extending in parallel and opposite to each other, each lead plate having a wide heat radiating portion on the extending side, and each heat radiating portion corresponding to each connection terminal In the lead plate disposed on the side where the heat radiating portion receiving piece in the polymerization state is connected to the heat radiating portion receiving piece formed in an overhanging state in the overlapping state, The heat radiating portion receiving piece is formed so as to extend to a position corresponding to the rectifying element main body and connected in a superposed state.

According to a fourth aspect of the present invention, in the solar cell module terminal box device according to the second or third aspect, the thickness of any one of the lead plates is 0.1 mm or less. In addition, slit-shaped cut portions are formed in the direction perpendicular to the extending direction alternately from both sides along the extending direction in the vicinity of the portion to which the rectifying element body is connected. Features.

The invention according to claim 5 is the solar cell module terminal box device according to claim 2 or claim 3, wherein heat is dissipated between the heat dissipating part of the lead plate and the heat dissipating part receiving piece of the connection terminal. A board is interposed.

As described above, according to the terminal box device for a solar cell module according to claim 1, the arrangement of the bypass rectifying elements is arranged in a staggered manner between the bypass rectifying elements arranged adjacent to each other. a structure in which a heat insulating partition wall consisting of a heat insulating material for partitioning between bypass rectifying elements, can improve the heat dissipation effect by distributed arrangement of the heat source Rutotomoni, by the heat insulating partition wall portion, the bypass rectifying element disposed adjacent A terminal box device for a solar cell module that can effectively prevent the temperature rise due to mutual interference and improve the heat dissipation effect , thus improving the durability of each bypass rectifier and improving long-term reliability. Can be provided.

According to the terminal box device for a solar cell module according to claim 2, the arrangement of each bypass rectifying element is arranged in a staggered manner, and the bypass rectifying element includes a rectifying element body formed in a chip shape, The rectifying device main body includes a pair of lead plates disposed on the upper surface and the lower surface of the rectifying element main body and extending in parallel to each other in opposite directions, and each lead plate has a wide heat dissipation portion on the extending side. In addition, each heat radiating part is connected in a superposed state to a heat radiating part receiving piece formed on each connecting terminal, and a lead plate disposed on the side where the heat radiating part receiving piece in the rectifying element body is connected in a superposed state In this structure, the heat-radiating part receiving piece is formed so as to extend to the position corresponding to the rectifying element body and connected in a superposed state. The heat generated in the element body can be dissipated through the wide heat dissipation part and heat dissipation part receiving piece, improving the heat dissipation effect, improving the durability of the bypass rectifier, and thus improving the long-term reliability. A terminal box device can be provided.

  According to the terminal box device for a solar cell module according to claim 3, the bypass rectifying element is disposed on the rectifying element main body formed in a chip shape, and the upper surface and the lower surface of the rectifying element main body, respectively. A pair of lead plates extending in parallel to each other and in opposite directions, each lead plate having a wide heat radiating portion on the extending side, and each heat radiating portion extending from each connecting terminal In the lead plate which is connected to the receiving piece in a superposed state and is arranged on the side where the heat radiating part receiving piece in the rectifying element body is connected in the superposed state, the heat radiating part receiving piece is the rectifying element. It is a structure that is extended to the position corresponding to the main body and connected in a superposed state, and the heat generated by the rectifying element main body can be dissipated through the wide heat radiation part and heat radiation part receiving piece, improving the heat radiation effect Figure , Improvement of the durability of the bypass rectifying element, it is possible to provide a terminal box device for a solar cell module which aimed at the turn improve the long-term reliability.

  According to the solar cell module terminal box device of claim 4, the thickness of any one of the lead plates is set to 0.1 mm or less and in the vicinity of the portion where the rectifying device body is connected. The slit-shaped cut portions are formed alternately in the direction perpendicular to the extending direction from both sides along the extending direction, and the portions where the cut portions are formed in the lead plate The structure is flexible and easy to bend, and the stress applied to the connecting portion between the rectifying device main body and each lead plate due to temperature change is alleviated, and there is an advantage that peeling at the connecting portion can be effectively prevented.

  According to the solar cell module terminal box device of claim 5, the heat dissipation plate is interposed between the heat dissipation portion of the lead plate and the heat dissipation portion receiving piece of the connection terminal, and the heat capacity is increased by the heat dissipation plate. Thus, the heat dissipation effect can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 shows a terminal box device 20 for a solar cell module. Like the above, a solar cell in which a large number of photovoltaic cells (cell groups) electrically connected in series are laid on the surface. The module is disposed on the back side of the module body.

  The terminal box device 20 includes a box housing 22 formed of synthetic resin or the like. The box housing 22 has a box body 22a having a substantially rectangular case structure with an upper surface having an accommodation recess therein. And a plate-like lid body (not shown) attached to the upper surface side with the housing recess as a closed shape.

  The terminal box device 20 has a structure in which the lower surface of the box body 22a is attached to the back side of the module body with an adhesive, as in the prior art, and is waterproof, moisture-proof, heat-dissipated, and prevents condensation. For the purpose, the housing recess is filled with silicone and the lid is bonded.

  The box body 22a is provided with a wiring hole 23 as a frame insertion hole along one edge on the bottom surface thereof, and a pair of outputs (on the left and right edges in the figure) on the side wall of the opposite edge. Cable fitting holes 25 are formed through which the extraction module connecting cables 24 are respectively fitted.

  Further, a plurality of terminal fixing portions (not shown) are arranged in parallel in the left-right direction so as to protrude from the bottom surface, located in the middle portion between the wiring hole 23 and each cable fitting hole 25 in the box body 22a. Connection terminals 26 and 27 are fixedly mounted on the parts. In the present embodiment, the core wire portion of the module connection cable 24 is caulked to the connection terminals 26 on both the left and right sides.

  And each edge part of the lead frame 28 as a some connector from the photoelectric conversion element of a solar cell module is each inserted in the box housing | casing 22 through the wiring hole 23, and corresponding connection terminal 26,27. It is set as the structure soldered to the edge part of each.

  Further, between the connection terminals 26 and 27 arranged adjacent to each other, as shown in FIGS. 2 and 3, a bypass diode 30 as a bypass rectifying element connected in parallel to the photoelectric conversion element of the solar cell module is provided. Each is arranged across.

  In other words, the bypass diode 30 is disposed on the bare chip diode 31 as a rectifying element body formed in a chip shape, and on the upper and lower surfaces of the bare chip diode 31, respectively, and is parallel to each other and extended in opposite directions. The lead plates 32 and 33 are made of a metal plate, and each lead plate 32 and 33 has a wide rectangular heat radiation portion 32a and 33a on the extending side. In the present embodiment, the upper lead plate 32 is provided with a narrow overhang portion 32b at the center in the width direction, and the lower lead plate 33 is a heat radiating portion 33a having a rectangular shape as a whole.

  The bare chip diode 31 is a mesa-type bare chip diode subjected to glass passivation. The bare chip diode 31 has an anode electrode 31a, a p-type region 31b, an n-type region 31c, and a cathode electrode 31d in the vertical direction (FIG. 3). And a glass film 31e as a protective film is formed in the side periphery of the laminated structure. The protective film can improve environmental resistance. The anode electrode 31 a on the p-type region 31 b side is connected to the protruding portion 32 b of the lead plate 32 by soldering, and the cathode electrode 31 d on the n-type region 31 c side is soldered to the edge of the lead plate 33. Connected by attaching.

  In addition, the adjacently disposed connection terminals 26 and 27 are formed with protruding heat radiation receiving portions 26a and 27a having the same shape and the same size corresponding to the heat radiation portions 32a and 33a, respectively, so as to face each other. 2, the heat radiating portions 32a and 33a of the lead plates 32 and 33 in the bypass diode 30 are soldered in a superposed state on the heat radiating portion receiving pieces 26a and 27a. Here, in the lead plate 33 disposed on the side where the heat radiation portion receiving piece 27a in the bare chip diode 31 is connected in a superposed state, the position where the heat radiation portion receiving piece 27a corresponds to the bare chip diode 31, that is, the bare chip diode. 31 is formed so as to project to a position below 31 and connected in a polymerized state. And it is used like the conventional terminal box apparatus 5. FIG.

  This embodiment is configured as described above, and the heat generated by the bare chip diode 31 is the same as that of the wide heat radiation portions 32a and 33a and the connection terminals 26 and 27 of the lead plates 32 and 33 made of metal. Heat can be radiated through the large heat radiating portion receiving pieces 26a and 27a, partial heat accumulation can be effectively prevented, heat can be radiated in a wide range, and the heat radiating effect can be improved. Therefore, the durability of the bare chip diode 31 and the like is improved, and there is an advantage that the long-term reliability of the bare chip diode 31 and thus the solar cell module can be improved.

  In addition, when inserting each connection terminal 26 that is caulked and connected to each module connecting cable 24 into the cable insertion hole 25, a method in which the heat radiation portion receiving piece 26a is penetrated in a folded state and then expanded, A method of caulking and connecting the connection terminal 26 to the core wire portion at the end of the module connecting cable 24 fitted in the hole 25 in advance may be employed, and the connection terminal 27 mounted in the box body 22a as in the prior art may be used. On the other hand, the connection terminal 26 may be connected by screw fastening or the like.

  Further, each of the lead plates 32 and 33 and the connection terminals 26 and 27 are formed using a material having high thermal conductivity, for example, a material such as copper (preferably oxygen-free copper) or a copper alloy in order to enhance the heat dissipation effect. It is preferred that

<Second Embodiment>
FIG. 4 shows the bypass diode 30 in the second embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, in the vicinity of the overhanging portion 32b of one lead plate 32 of the bypass diode 30, alternately from both sides along the extending direction, deep in a direction perpendicular to the extending direction. The structure has a meandering portion 32c in which a slit-like cut portion 35 is formed.

  And the rectangular part which does not have the notch part 35 is comprised as the thermal radiation part 32a.

  Further, the lead plate 32 is a thin metal plate having a thickness of 0.1 mm or less.

  In the bypass diode 30, as in the first embodiment, the heat dissipating portions 32a and 33a are provided on the heat dissipating portion receiving pieces 26a and 27a that are formed to project from the adjacent connection terminals 26 and 27, respectively. Connected in a polymerized state.

  Therefore, according to the present embodiment, the same effect as that of the first embodiment is obtained, and the structure is easily bent flexibly at the meandering portion 32c. Therefore, the bare chip diode 31 and the lead plates 32 and 33 due to temperature change are provided. The stress applied to the connection portion between the bare chip diode 31 and the lead plates 32 and 33 can be effectively prevented from being peeled off.

  In the present embodiment, the structure in which the overhanging portion 32b and the meandering portion 32c are provided on the lead plate 32 side connected to the p-type region 31b of the bare chip diode 31 is shown, but it is connected to the n-type region 31c. It is good also as a structure which provides an overhang | projection part and a meandering part in the lead board 33 side.

<Third Embodiment>
FIG. 5 shows a third embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In other words, in the present embodiment, the heat radiation portions 32a and 33a of the lead plates 32 and 33 in the bypass diode 30 and the heat radiation portion receiving pieces 26a and 27a of the connection terminals 26 and 27 are substantially the same shape. The heat sink 37 is made of a rectangular metal of the same size and is connected by soldering.

  Therefore, according to this embodiment, while having the same effect as 1st Embodiment, the improvement of the heat dissipation effect can be aimed at by the increase in the heat capacity by the heat sink 37. FIG.

  In this case, since the heat radiating plate 37 has a heat radiating effect, the connection terminals 26 and 27 can be thinned, and workability at the time of soldering between the connection terminals 26 and 27 and the lead frames 28 can be improved.

  In addition, although the structure which interposes the heat sink 37 between each heat radiating part 32a, 33a and each heat radiating part receiving piece 26a, 27a is shown, it is the structure where the heat radiating plate 37 is interposed only in either one. May be.

<Fourth Embodiment>
6 to 8 show a fourth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, the leg portion 27b that is bent and extended in the direction of the mounting surface 22b attached to the solar cell module in the box housing 22 is provided at the end edge of one heat radiation portion receiving piece 27a of the connection terminal 27. A structure including a heat dissipating surface portion 27c bent at the lower end of the leg portion 27b and extending in parallel with the heat dissipating portion receiving piece 27a, and a spring piece portion 27d formed by folding back at the extending end of the heat dissipating surface portion 27c; Has been.

  Then, if the heat radiating surface portion 27c and the spring piece portion 27d are inserted from the insertion port 22d on one side of the terminal fixing portion 22c provided integrally with the box housing 22, the mounting state shown in FIG. 8 is obtained. In this mounted state, the upper end edge portion of the spring piece portion 27d is locked in a retaining shape in the locking hole portion 22e of the terminal fixing portion 22c by elastic recovery.

  At this time, the heat radiating surface portion 27 c is exposed on the mounting surface 22 b side of the box housing 22.

  Then, on each heat radiation portion receiving piece 27a, the lead plates 32, 33 of the bypass diode 30 are soldered in a superposed manner across the heat radiation portion receiving pieces 26a, 27a of the adjacent connection terminals 26, 27 as described above. The structure is attached.

  Therefore, the present embodiment has the same effect as that of the first embodiment and has a structure in which the heat radiation surface portion 27c of the connection terminal 27 is exposed on the back surface side of the solar cell module. The heat dissipation with respect to the side can be improved, and the heat dissipation effect can be further improved.

<Fifth Embodiment>
FIG. 9 shows a box housing 22 in the fifth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, an elongated metal plate 39 is attached to a portion corresponding to each attachment position of the bypass diode 30 on the attachment surface 22b attached to the solar cell module of the box housing 22. .

  At this time, the metal plate 39 is bonded to the bonding recess 22f formed on the mounting surface 22b as shown in FIG. The plate 39 is fitted and mounted by a structure that holds the plate 39 with a protrusion formed on the opening edge.

  Therefore, the present embodiment has the same effect as that of the first embodiment, and the heat dissipation performance to the module body side is effectively improved through the metal plate 39 attached to the portion corresponding to the attachment position of each bypass diode 30. It is possible to improve the heat dissipation effect.

<Sixth Embodiment>
FIG. 11 shows a box housing 22 in the sixth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, the connection structure between the connection terminals 26 and 27 and the bypass diodes 30 provided in the box housing 22 is configured in the same manner as in the first to fifth embodiments.

  And in this embodiment, it is set as the structure which covered the surface which has touched the air layer of the box housing | casing 22 in the state attached to the back surface of the solar cell module with the metal cover body 41. FIG.

  The cover body 41 is formed of a material excellent in heat radiation, that is, heat dissipation, for example, a trade name “Kobe Hornets” made by Kobe Steel, and the folding engagement pieces 41 a provided on both sides are attached to the box housing 22. The mounting surface 22b is bent so that it can be mounted.

  Therefore, this embodiment also has the same effect as the first to fifth embodiments, and can effectively dissipate the internal heat to the outside through the metal cover body 41 attached to the surface. Improvement can be achieved.

  Further, by using a material having excellent heat dissipation as the material of the cover body 41, the heat dissipation effect can be further improved.

  In this embodiment, a structure in which the cover body 41 is separately attached to the box housing 22 is shown. However, a structure in which the lid attached to the upper surface opening portion of the box body 22a is made of metal may be used. In addition, a portion of the box housing 22 located on the surface may be formed of metal.

<Seventh Embodiment>
FIG. 12 shows the box housing 22 in the seventh embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, the connection structure between the connection terminals 26 and 27 and the bypass diodes 30 provided in the box housing 22 is configured in the same manner as in the first to fifth embodiments.

  In the present embodiment, the entire outer surface of the box housing 22 is covered with a metal cover body 42.

  As in the sixth embodiment, the cover body 42 is formed of a material having excellent heat radiation, that is, heat dissipation, for example, a product name “Kobe Hornets” manufactured by Kobe Steel, and the top wall portion 42a on one side edge and The bottom wall portion 42b is provided with a folding locking piece 42c, and can be mounted by folding each folding locking piece 42c along the side surface of the box housing 22.

  At this time, a wiring hole corresponding to the wiring hole 23 of the box housing 22 is formed in the bottom wall portion 42 b, and the bottom wall portion 42 b has a two-part structure, and is attached to the box housing 22. In this case, the bottom wall portion 42b having a two-part structure is bent toward the mounting surface 22b, so that interference with each lead frame 28 is avoided.

  Therefore, the present embodiment has the same effects as those of the first to fifth embodiments, and can effectively dissipate the internal heat to the outside through the metal cover body 42 that covers the outer surface. The effect can be further improved.

  Further, by using a material with excellent heat dissipation as the material of the cover body 42, the heat dissipation effect can be further improved.

  In the present embodiment, the structure in which the cover body 42 is attached to the box housing 22 from the direction opposite to the module connection cable 24 is shown, but the side of the box housing 22 (in the direction of arrow P in FIG. The cover body 42 may be mounted from the (Q direction). In this case, the bottom wall portion 42b need not have a two-part structure.

<Eighth Embodiment>
FIG. 13 shows an eighth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In other words, in the present embodiment, the box casing 22 is disposed across the connection terminals 27 and the main box casing 44A in which the connection terminals 26 connected to the pair of module connection cables 24 are accommodated. The plurality of sub-box housings 44B and 44C arranged for each bypass diode 30 are arranged in a distributed manner with appropriate intervals.

  The connection terminals 26 of the main box housing 44A and the connection terminals 27 of the sub box housings 44B and 44C are sequentially connected by lead frames 28 arranged on the solar cell module 1 side. .

  According to the present embodiment, the sub-box housings 44B and 44C are individually provided for each bypass diode 30 serving as a heat source, and the heat source can be dispersed and the heat dissipation effect can be improved. The durability of the bypass diode 30 can be improved, and the solar cell module 1 capable of improving long-term reliability can be provided.

  In addition, there is an advantage that the heat dissipation effect can be further improved by disposing the box housings 44A, 44B, and 44C at appropriate intervals.

  In the present embodiment, if the structures of the first to fifth embodiments are appropriately employed as the connection structure between the connection terminals 27 and the bypass diodes 30, the effects of the embodiment can also be exhibited. .

<Ninth Embodiment>
FIG. 14 shows a ninth embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, the disposition of the bypass diodes 30 that are disposed across the connection terminals 26 and 27 is not a single-row disposition in the horizontal direction as shown in FIG. As shown in FIG. 2, the structure is arranged in a staggered manner along the left-right direction.

  Further, between the bypass diodes 30 arranged adjacent to each other, a heat insulating partition wall 46 as a heat insulating partition wall portion made of a resin as a heat insulating material is provided upright so as to partition each other.

  Therefore, according to the present embodiment, since the bypass diodes 30 serving as heat sources are distributed, the temperature rise due to mutual interference can be effectively prevented, and the heat radiation effect can be improved by the dispersion of the heat sources. It is possible to provide a solar cell module that can improve the durability of the bypass diode 30 and improve long-term reliability.

  At this time, the heat insulating partition wall 46 also has an advantage that a temperature rise due to mutual interference with the adjacently disposed bypass diode 30 can be effectively prevented, and the heat dissipation effect can be further improved.

  In the present embodiment, if the structures of the first to seventh embodiments are appropriately employed as the connection structure between the connection terminals 27 and the bypass diodes 30, the effects of the embodiments can be exhibited.

  Further, the number of bypass diodes 30 and the number and shape of each of the connection terminals 26 and 27 in each of the above embodiments may be appropriately determined as needed, and are not limited to each embodiment.

It is a schematic plan view which shows the terminal box apparatus in 1st Embodiment. It is the principal part perspective view. It is the same part sectional view. It is a principal part top view in 2nd Embodiment. It is a principal part disassembled perspective view in 3rd Embodiment. It is a perspective view of the connecting terminal in a 4th embodiment. It is the same mounting explanatory view. It is the same mounting explanatory view. It is a bottom view of the box housing | casing in 5th Embodiment. It is principal part sectional drawing which shows a modification. It is a disassembled perspective view which shows 6th Embodiment. It is a disassembled perspective view which shows 7th Embodiment. It is a principal part perspective view which shows 8th Embodiment. It is a schematic plan view which shows 9th Embodiment. It is a schematic block diagram of a solar cell module. It is a figure which shows the connection state of a several solar cell module. It is a block diagram of a photovoltaic power generation system. It is a top view which shows the terminal box apparatus in a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solar cell module 1a Module main body 3 Solar cell 20 Terminal box apparatus 22 Box housing 22b Mounting surface 24 Module connection cable 26 Connection terminal 26a Heat radiation part receiving piece 27 Connection terminal 27a Heat radiation part receiving piece 27c Heat radiation surface part 28 Lead frame 30 Bypass Diode 31 Bare chip diode 32 Lead plate 32a Heat radiation portion 32b Overhang portion 32c Meander portion 33 Lead plate 33a Heat radiation portion 35 Cut portion 37 Heat radiation plate 39 Metal plate 41 Cover body 42 Cover body 44A Main box housing 44B, 44C Sub box housing 46 Insulation partition wall

Claims (5)

A box housing mounted on the solar cell module, a plurality of connection terminals disposed in the box housing and connected to a plurality of connectors from the photoelectric conversion elements of the solar cell module, and corresponding connection terminals For a solar cell module comprising a pair of output extraction module connecting cables that are connected and the other end is drawn out of the box housing, and a plurality of bypass rectifying elements that are arranged across the adjacent connection terminals In the terminal box device,
The arrangement of the bypass rectifying elements is arranged in a staggered manner ,
A terminal box device for a solar cell module, wherein a heat insulating partition wall portion made of a heat insulating material for partitioning the bypass rectifying elements is provided between the bypass rectifying elements arranged adjacent to each other . A box housing mounted on the solar cell module, a plurality of connection terminals disposed in the box housing and connected to a plurality of connectors from the photoelectric conversion elements of the solar cell module, and corresponding connection terminals For a solar cell module comprising a pair of output extraction module connecting cables that are connected and the other end is drawn out of the box housing, and a plurality of bypass rectifying elements that are arranged across the adjacent connection terminals In the terminal box device,
The arrangement of the bypass rectifying elements is arranged in a staggered manner,
The bypass rectifying element includes a rectifying element body formed in a chip shape, a pair of lead plates disposed on the upper surface and the lower surface of the rectifying element body, and extending in parallel and opposite to each other. Each lead plate has a wide heat radiating portion on the extending side, and each heat radiating portion is connected in a superposed state to a heat radiating portion receiving piece formed to project to each connection terminal. In the lead plate disposed on the side where the heat radiating portion receiving piece is connected in the superposed state, the heat radiating portion receiving piece is formed so as to extend to the position corresponding to the rectifying element body and connected in the superposed state. The terminal box apparatus for solar cell modules characterized by the above-mentioned . In the solar cell module terminal box device according to claim 1,
The bypass rectifying element includes a rectifying element body formed in a chip shape, a pair of lead plates disposed on the upper surface and the lower surface of the rectifying element body, and extending in parallel and opposite to each other. Each lead plate has a wide heat radiating portion on the extending side, and each heat radiating portion is connected in a superposed state to a heat radiating portion receiving piece formed to project to each connection terminal. In the lead plate disposed on the side where the heat radiating portion receiving piece is connected in the superposed state, the heat radiating portion receiving piece is formed so as to extend to the position corresponding to the rectifying element body and connected in the superposed state. The terminal box apparatus for solar cell modules characterized by the above-mentioned. In the terminal box device for solar cell modules according to claim 2 or claim 3,
The thickness of any one of the lead plates is set to 0.1 mm or less, and in the vicinity of the portion to which the rectifying device main body is connected, alternately from both sides along the extending direction, A terminal box device for a solar cell module, wherein a slit-shaped cut portion is formed in a direction perpendicular to the extending direction. In the terminal box device for solar cell modules according to claim 2 or claim 3,
A solar cell module terminal box device, wherein a heat dissipation plate is interposed between the heat dissipation portion of the lead plate and the heat dissipation portion receiving piece of the connection terminal.

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