JP6802328B2 - Half cut module - Google Patents

Description

The present invention relates to the technical field of photovoltaics, especially to half-cut modules.

A cell obtained by dividing a standard-specification solar cell (that is, a solar cell having a square or rounded square shape) into two equal parts is called a half-cut cell. For example, a 125 mm × 125 mm solar cell is divided into two equal parts to obtain two 125 mm × 62.5 mm half-cut cells, and a 156 mm × 156 mm solar cell is divided into two equal parts to obtain 156 mm × 78 mm. You can get two half-cut cells. Therefore, a module in which a plurality of half-cut cells are connected and packaged is called a half-cut module. Currently, half-cut modules consisting of 120 (6 columns x 20 rows) half-cut cells and 144 (6 columns x 24 rows) half-cut cells are mainstream in the market. Among them, the half-cut module can be classified into a center drawer type and an edge drawer type depending on how the bus bar is pulled out.

In the center drawer type half-cut module, the half-cut cell is divided into two parts, upper and lower, and each part is a half-cut cell with 6 columns x 10 rows (when the number of half-cut cells is 120). ) Or 6 columns x 12 rows of half-cut cells (when the number of half-cut cells is 144). In the upper half part, the half-cut cells in each row are connected in series to form six small strings, the six small strings are connected in series to form one large string, and similarly in the lower half part. , The half-cut cells in each row are connected in series to form six small strings, and these six small strings are connected in series to form one large string. Two large strings, upper and lower, are connected in parallel to form a cell circuit. The busbar for connecting the upper and lower two large strings in parallel is located between the upper half and the lower half, that is, in the center position of the module. Correspondingly, an opening hole is provided at the center position of the backing plate of the module, and the bus bar is connected to the junction box after passing through the opening hole, and the positive / negative cable of the module is pulled out from the junction box. Generally, the junction box is provided with a bypass diode which is connected in parallel with the bus bar connected to the junction box to prevent or reduce the hot spot effect. A schematic diagram of the electric circuit and a schematic diagram of the back surface structure of the center drawer type half-cut module composed of 120 half-cut cells can be referred to with reference to FIGS. 1 (a) and 1 (b). FIG. 1A is a schematic diagram of electrical circuit connection of a center-drawing type half-cut module composed of 120 half-cut cells in the prior art (reference numeral 10 represents a half-cut cell, where the longer horizontal line is The positive electrode of the half-cut cell, the shorter horizontal line represents the negative electrode of the half-cut cell, and reference numerals 11, 12, and 13 represent bypass diodes), and FIG. 1 (b) shows 120 half-cuts in the prior art. FIG. 6 is a schematic diagram of the back surface structure of a center drawer type half-cut module composed of cells (reference numerals 14, 15 and 16 represent a junction box, and reference numerals 17 and 18 represent positive and negative electrode cables).

In the edge drawer type half-cut module, there are 6 rows of half-cut cells (when the number of half-cut cells is 120, there are 20 half-cut cells in each row, and when the number of half-cut cells is 144, (There are 24 half-cut cells in each row), the half-cut cells in each row are connected in series to form 6 small strings, and the 6 small strings are connected in parallel, two by two. Three large strings are formed, and finally the three large strings are connected in series to form a cell circuit. Since the positive and negative electrodes of the cell circuit are on both sides of the head and tail of the module, in order to ensure the rationality of the electric circuit design, one bus bar that penetrates the module from the head to the tail separately is used to make the positive and negative electrodes of this cell circuit. The negative electrode must be guided to the same side of the module (ie, the head of the half-cut module). The junction box is located at the head of the backing plate of the module, and the busbar at the head of the module is connected into the junction box through the opening hole at the corresponding position on the backing plate and inside the junction box. Pull out the positive and negative cables of the module from. A bypass diode connected in parallel with the bus bar connected to the junction box is arranged in the junction box. 2 (a) and 2 (b) can be referred to for the schematic diagram of the electric circuit and the schematic diagram of the back surface structure of the edge drawer type half-cut module. FIG. 2A is a schematic diagram of electrical circuit connection of an edge-drawing type half-cut module composed of 120 half-cut cells in the prior art (reference numeral 20 represents a half-cut cell, where the longer horizontal line is The positive electrode of the half-cut cell, the shorter horizontal line represents the negative electrode of the half-cut cell, reference numerals 21 and 22 represent bypass diodes, and reference numeral 23 represents a bus bar penetrating the module from the head to the tail). (B) is a schematic diagram of the back surface structure of an edge drawer type half-cut module composed of 120 half-cut cells in the prior art (reference numerals 24 and 25 represent junction boxes, and reference numerals 26 and 27 are positive and negative electrode cables. Represents).

Both the center-drawing type half-cut module and the edge-drawing type half-cut module have some inconveniences. Specifically, in a center-drawing half-cut module, it is necessary to make a hole in the center position of the backing plate of the module, and in such a design, the stress concentration in the opening hole becomes large, which causes the module. The mechanical load capacity as a whole is reduced, and the reliability of the half-cut module is further reduced. In an edge-drawing half-cut module, it is necessary to place one busbar that penetrates the module from head to tail, and such a design satisfies the rationality of the module's electrical circuit design, but the module. The area of the half-cut module becomes large, which reduces the conversion efficiency of the half-cut module. Also, the busbar that penetrates the module from the head to the tail breaks the symmetry of the half-cut module and affects the appearance of the half-cut module.

The present invention is arranged on a transparent cover plate, a backing plate, a plurality of solar cell strings arranged between the transparent cover plate and the backing plate, and a backing plate in order to solve the above-mentioned drawbacks of the prior art. A half-cut module that includes a junction box
A plurality of solar cell strings are arranged side by side, and each of the solar cell strings includes a plurality of half-cut cells connected in series and arranged in the short side direction of the half-cut cell.
The number of solar cell strings is an integral multiple of 4, two solar cell strings are grouped together, the positive and negative electrodes of the solar cell strings in each group are arranged in the same direction, and the solar cell strings in two adjacent groups are arranged. The positive and negative electrodes of are arranged in opposite directions.
The solar cell strings in each group are connected in parallel by a bus bar to form a solar cell string group, and the adjacent solar cell strings are connected in series by a bus bar, and the positive and negative electrodes are on the same side of the half-cut module. Form a circuit,
The junction box is located on the same side as the positive and negative electrodes of the cell circuit, and the bus bar on the same side as the positive and negative electrodes of the cell circuit is connected inside the junction box and the half-cut module from inside the junction box. We provide a half-cut module that draws out the positive and negative electrodes of.

According to one aspect of the present invention, in such a half-cut module, the solar cell strings have the order of the first solar cell string, the second solar cell string, ..., The fourth N solar cell string, and the bus bar. Is a first head bus bar, a second head bus bar, ..., N + 1 head bus bars, which are N + 1 head bus bars, and a first tail bus bar and a second tail bus, respectively. Busbars, ..., N tail busbars, which are Nth tail busbars, are included, and the first end of the first and second solar cell strings is connected by the first head busbar to the 4n-1 to 4n-1. The first end of the 4n + 2 solar cell string is connected by the n + 1 head bus bar, and the first end of the 4N-1 and 4N solar cell strings is connected by the N + 1 head bus bar (however). , N = 1, 2, ..., N-1), the second end of the 4th m + 1 to 4m + 4 solar cell strings is connected by the tail bus bar of the m + 1 (however, m = 0, 1, 2). , ..., N-1), the number of junction boxes is N, and the N junction boxes are the first junction box, the second junction box, ..., the Nth junction box, respectively. , The kth junction box is arranged at a position corresponding to the kth head part bus bar and the k + 1th head part bus bar on the backing plate, and the kth head part bus bar and the k + 1th head part bus bar are arranged. It is connected to the kth junction box through the backing plate (however, k = 1, 2, ..., N), and the positive and negative electrodes of the half-cut module are of the first junction box and the Nth junction box, respectively. It is drawn from the inside, and N is a natural number.

According to another aspect of the invention, in such a half-cut module, the half-cut module comprises eight solar cell strings, each of which comprises 15 half-cut cells, or half-cut. The module contains eight solar cell strings, each of which contains 18 half-cut cells.

According to another aspect of the present invention, in such a half-cut module, a bypass diode connected in parallel with a head bus bar, each of which is connected to the junction box, is arranged in each of the junction boxes. There is.

According to another aspect of the invention, in such a half-cut module, the half-cut module further includes a back rail consisting of a rear plate, a front plate, a first connecting plate and a fixing plate, and the upper end of the rear plate. And the upper end of the front plate are fixedly connected, and the first connection plate is arranged between the rear plate and the front plate, and is fixedly connected to the rear plate and the front plate, respectively. A receiving groove is formed between the connecting plate and the front plate for inserting the solar panel bracket, and the fixing plate is arranged at the lower end of the front plate and extends in a direction away from the rear plate. The fixing plate is provided with bolt mounting holes, and the back rail is fixedly connected to the backing plate in the half-cut module via the rear plate.

According to another aspect of the present invention, in such a half-cut module, the back rail further includes a second connecting plate, the upper end of the rear plate via the second connecting plate to the upper end of the front plate. It is connected.

According to another aspect of the present invention, in such a half-cut module, the range of the angle between the front plate and the rear plate is 3 ° to 5 °.

According to another aspect of the invention, in such a half-cut module, the solar panel bracket comprises a web plate, a first flange plate, a second flange plate, and a flange side, the first flange plate, the first. The flange plate 2 is connected vertically to each of the two long sides of the web plate, and the first flange plate, the web plate, and the second flange plate have a U-shaped structure, and the flange sides have a U-shaped structure. , It is connected perpendicularly to the end of the second flange plate and extends toward the first flange plate, and both the first connecting plate and the fixing plate are perpendicular to the rear plate, and the first The width of the connecting plate 1 is equal to or greater than the thickness of the first flange plate, and the vertical distance between the first connecting plate and the fixing plate is equal to or less than the height of the first flange plate.

According to another aspect of the present invention, in such a half-cut module, the backing plate has a rectangular shape including a first opposite side and a second opposite side, and the first opposite side has two parallel sides. The third opposite side includes the first side, the second opposite side includes two parallel second sides, and the rear plate has a rectangular shape including the third opposite side and the fourth opposite side. The opposite side contains two parallel third sides, the fourth opposite side contains two parallel fourth sides, and the third side of the rear plate is parallel to the first side of the backing plate. The fourth side of the rear plate is parallel to the second side of the backing plate, and the ratio of the third side to the fourth side of the rear plate is the first side and the second side of the backing plate. Is equal to the ratio with.

According to another aspect of the present invention, in such a half-cut module, the number of backrails is four, the four backrails with respect to the perpendicular bisector of the first opposite side and the first. It is symmetrically distributed with respect to the perpendicular bisector of the opposite side of 2, and the respective arrangement positions of the back rails are as follows: H / 5 <h <H / 4, B / 5 <b <B / 4 (where H represents the length of the first side of the backing plate, B represents the length of the second side of the backing plate, and h is between the back rail and the second side closest to it. Represents the distance between the back rail and the first side closest to it).

The number of solar cell strings in the half-cut module provided by the present invention is an integral multiple of 4, however, each of the solar cell strings consists of a plurality of half-cut cells connected in series to form a solar cell string. The positive and negative electrodes of the solar cell strings in each group are arranged in the same direction, and the positive and negative electrodes of the solar cell strings in the two adjacent groups are arranged in opposite directions. The battery strings are connected in parallel by the bus bar to form a solar cell string group, and the adjacent solar cell strings are connected in series by the bus bar to form a cell circuit in which the positive and negative electrodes are on the same side of the half-cut module. , The junction box is located on the same side as the positive and negative electrodes of the cell circuit, and the bus bar on the same side as the positive and negative electrodes of the cell circuit is connected inside the junction box and half-cut from inside the junction box. Pull out the positive and negative electrodes of the module. Since the positive and negative sides of the half-cut module provided in the present invention are drawn from the edge of the module, it is only necessary to make a hole at the edge of the backing plate, and a center drawer for making a hole in the center of the conventional backing plate. Compared to the mold half-cut module, the half-cut module provided in the present invention effectively reduces the stress in the opening hole and also effectively improves the mechanical load capacity of the module as a whole. On the other hand, in the half-cut module provided in the present invention, the positive and negative sides of the cell circuit are exactly on the same side of the module, so that one bus bar that penetrates the conventional module from the head to the tail can be used for the cell circuit. Compared to the edge-drawing type half-cut module that needs to guide the positive and negative to the same side, the half-cut module provided by the present invention effectively reduces the area of the module and further improves the conversion efficiency of the module. It can be effectively improved. It should be noted that the half-cut provided in the present invention is compared with the edge-drawing type half-cut module which needs to guide the positive and negative electrodes of the cell circuit to the same side with one bus bar that penetrates the conventional module from the head to the tail. The module has a symmetrical structure and looks good. That is, the half-cut module provided by the present invention has the features of high reliability, high conversion efficiency, and good appearance.

Other features, objectives, and advantages of the present invention will become more apparent by looking at the detailed description given for non-limiting examples with reference to the drawings below.

FIG. 1A is a schematic diagram of an electric circuit connection of a center-drawing type half-cut module composed of 120 half-cut cells in the prior art. FIG. 1B is a schematic diagram of the back surface structure of a center drawer type half-cut module composed of 120 half-cut cells in the prior art. FIG. 2A is a schematic diagram of connecting an electric circuit of an edge-drawing type half-cut module composed of 120 half-cut cells in the prior art. FIG. 2B is a schematic diagram of the back surface structure of an edge drawer type half-cut module composed of 120 half-cut cells in the prior art. FIG. 3A is a schematic view of the surface structure of the half-cut module according to a specific embodiment of the present invention. FIG. 3B is a schematic diagram of the back surface structure of the half-cut module according to a specific embodiment of the present invention. FIG. 3C is a schematic diagram of an electric circuit connection of a half-cut module according to a specific embodiment of the present invention. 4 (a) to 4 (f) are a right side view, a left side view, a front view, a rear view, a plan view, and a bottom view of a back rail in a half-cut module according to a specific embodiment of the present invention, respectively. is there. FIG. 5 is a schematic cross-sectional view taken along the width direction of the solar panel bracket according to a specific embodiment of the present invention. 6 (a) and 6 (b) are a right side view and a left side view of the back rail in the half-cut module according to another specific embodiment of the present invention, respectively. FIG. 7 is a schematic diagram of the back surface structure of the half-cut module according to another specific embodiment of the present invention. FIG. 8 is a side schematic view and a partially enlarged schematic view of the structure in which the half-cut module shown in FIG. 7 is fixed to the solar panel bracket.

In the drawings, the same or similar reference numerals represent the same or similar members.

In order to better understand and interpret the present invention, the present invention will be described in more detail below with reference to the drawings.

The present invention is a half-cut module including a transparent cover plate, a backing plate, a plurality of solar cell strings arranged between the transparent cover plate and the backing plate, and a junction box arranged on the backing plate. ,
A plurality of solar cell strings are arranged side by side, but each of the solar cell strings includes a plurality of half-cut cells connected in series and arranged in the short side direction of the half-cut cell.
The number of solar cell strings is an integral multiple of 4, however, two solar cell strings are grouped together, the positive and negative electrodes of the solar cell strings in each group are arranged in the same direction, and the sun in two adjacent groups. The positive and negative electrodes of the battery string are arranged in opposite directions.
The solar cell strings in each group are connected in parallel by a bus bar to form a solar cell string group, and the adjacent solar cell strings are connected in series by a bus bar, and the positive and negative electrodes are on the same side of the half-cut module. Form a circuit,
The junction box is located on the same side as the positive and negative electrodes of the cell circuit, and the bus bar on the same side as the positive and negative electrodes of the cell circuit is connected inside the junction box and the half-cut module from inside the junction box. We provide a half-cut module that draws out the positive and negative electrodes of.

Hereinafter, each of the components of the half-cut module provided in the present invention will be described in detail.

Specifically, the half-cut module includes, from top to bottom, a transparent cover plate, multiple solar cell strings, and a backing plate, provided between the transparent cover plate and the strings and backing with the solar cell strings. It is bonded to the plate with a sealing film. In one preferred embodiment, both the transparent cover plate and the backing plate are made of tempered glass. The half-cut module also includes a junction box located on the backing plate.

A plurality of solar cell strings are arranged side by side between the transparent cover plate and the backing plate. In this embodiment, each of the plurality of solar cell strings is formed by connecting a plurality of half-cut cells of the same number in series. However, the half-cut cell is obtained by dividing a standard-specification solar cell into two equal parts by a laser along a direction perpendicular to the main grid line. Typically, by dividing a 125 mm × 125 mm size solar cell into two equal parts, a 125 mm × 62.5 mm size half-cut cell is obtained, and a 156 mm × 156 mm size solar cell is divided into two equal parts. As a result, a half-cut cell having a size of 156 mm × 78 mm can be obtained. The plurality of solar cells in each solar cell string are arranged along the short side direction of the half-cut cell, and the plurality of solar cell strings are arranged along the long side direction of the half-cut cell.

In this embodiment, the number of solar cell strings is an integral multiple of 4, for example, 4, 8, 12, 16, and so on. However, the solar cell strings are grouped into groups of two, the positive and negative electrodes of the two solar cell strings in each group are arranged in the same direction, and the positive and negative electrodes of the solar cell strings in the two adjacent groups are arranged in opposite directions. Has been done. Taking eight solar cell strings as an example, one end of the eight solar cell strings is, in order, "positive electrode", "positive electrode", "negative electrode", "negative electrode", "positive electrode", "positive electrode", "negative electrode", It is a "negative electrode", and the other ends of the eight solar cell strings are "negative electrode", "negative electrode", "positive electrode", "positive electrode", "negative electrode", "negative electrode", "positive electrode", and "positive electrode" in that order. is there.

In each group, the two solar cell strings in which the positive and negative electrodes are arranged in the same direction with each other are connected in parallel by a bus bar to form a solar cell string group. If the number of solar cell strings is four, the number of solar cell strings is two, if the number of solar cell strings is eight, the number of solar cell strings is four, and so on. By analogy with this. A cell circuit is formed by being connected in series by a bus bar between adjacent solar cell strings. Since the number of solar cell strings is an integral multiple of 4, the number of solar cell strings is an integral multiple of 2, so that the positive and negative electrodes of the cell circuit are exactly on the same side of the half-cut module.

The backing plate of the module is provided with an opening hole on the same side as the positive and negative electrodes of the cell circuit. The junction box is located in a position corresponding to the opening hole in the backing plate, i.e., the junction box is on one side of the half-cut module. The bus bar on the same side as the positive and negative electrodes of the cell circuit is connected to the inside of the junction box through the opening hole. In this embodiment, the junction box is a separate type junction box. In another embodiment, the junction box may be an integrated junction box. The positive and negative electrodes of the half-cut module are pulled out of the junction box by the positive and negative electrodes cables.

The number of solar cell strings in the half-cut module provided by the present invention is an integral multiple of 4, two solar cell strings are grouped together, and the positive and negative electrodes of the solar cell strings in each group are arranged in the same direction. The positive and negative electrodes of the solar cell strings in the two adjacent groups are arranged in opposite directions to each other, so that the solar cell strings in each group are connected in parallel to form a solar cell string group, and the solar cell string group is formed. When the cell circuits are connected in series, the positive and negative electrodes of the cell circuits are exactly on the same side edge of the half-cut module. The junction box is located on the same side as the positive and negative electrodes of the cell circuit, and the bus bar on the same side as the positive and negative electrodes of the cell circuit is connected into the junction box through the opening hole in the backing plate and is connected to the junction. Pull out the positive and negative electrodes of the half-cut module from the box. Since the positive and negative sides of the half-cut module provided in the present invention are pulled out from the edge of the module, it is only necessary to make a hole at the edge of the backing plate, and a center drawer for making a hole in the center of the conventional backing plate. Compared to the mold half-cut module, the half-cut module provided in the present invention effectively reduces the stress in the opening hole and also effectively improves the mechanical load capacity of the module as a whole. On the other hand, in the half-cut module provided by the present invention, since the positive and negative sides of the cell circuit are exactly on the same side of the module, a separate module can be installed from the head to the tail like a conventional edge-drawing type half-cut module. It is not necessary to guide the positive and negative sides of the cell circuit to the same side with one penetrating bus bar, the area of the module can be effectively reduced, and the conversion efficiency of the module can be effectively improved. It should be noted that the half-cut provided in the present invention is compared with the edge-drawing type half-cut module which needs to guide the positive and negative electrodes of the cell circuit to the same side with one bus bar that penetrates the conventional module from the head to the tail. The module has a symmetrical structure and looks good. That is, the half-cut module provided by the present invention has the features of high reliability, high conversion efficiency, and good appearance.

Hereinafter, a specific connection method of the solar cell string and the junction box in the half-cut module provided by the present invention will be described with reference to a preferred embodiment. Let the number of solar cell strings be 4N (where N is a natural number). The 4N solar cell strings have an order of a first solar cell string, a second solar cell string, ..., A fourth solar cell string. The plurality of half-cut cells in each solar cell string are connected in series by an interconnect ribbon, and positive and negative electrodes are pulled out at both ends of the solar cell string, except that both ends of the solar cell string are the first end and the first, respectively. Called the end of 2. In the present embodiment, the bus bars are the first head bus bar, the second head bus bar, ..., the N + 1 head bus bar which is the N + 1 head bus bar, and the first tail bus bar, respectively. , Second tail busbar, ..., N-tail busbar, which is the Nth tail busbar. Among them, the first end of the first and second solar cell strings is by the first head bus bar, and the first end of the 4n-1 to 4n + 2 solar cell strings is by the n + 1 head bus bar. The first ends of the 4N-1 and 4N solar cell strings are connected by the head bus bar of the N + 1 (however, n = 1, 2, ..., N-1), and the 4th m + 1 to 4m + 4 The second end of the solar cell string is connected by the tail busbar of the m + 1 (where m = 0, 1, 2, ..., N-1). In this embodiment, the number of junction boxes is N, and the N junction boxes are the first junction box, the second junction box, ..., The Nth junction box, and the kth The junction box of is arranged at a position corresponding to the kth head bus bar and the k + 1 head bus bar on the backing plate, and the k head bus bar and the k + 1 head bus bar penetrate the backing plate. Is connected to the kth junction box (however, k = 1, 2, ..., N). The positive and negative electrodes of the half-cut module are drawn out from the first junction box and the Nth junction box, respectively.

This will be described by taking N = 2 as an example. Please refer to FIGS. 3 (a) and 3 (b), which are a schematic view of the front surface structure and a schematic diagram of the back surface structure of the half-cut module according to a specific embodiment of the present invention, respectively. As shown in FIG. 3A, eight solar cell strings are arranged under the transparent cover plate 101, and the half-cut cell 100 in each solar cell string is formed by an interconnect ribbon (not shown). It is connected in series. The eight solar cell strings are, in order from left to right, a first solar cell string, a second solar cell string, ..., An eighth solar cell string. One end of the first to eighth solar cell strings (hereinafter referred to as the first end) is a "positive electrode", a "positive electrode", a "negative electrode", a "negative electrode", a "positive electrode", a "positive electrode", and a "negative electrode", respectively. , "Negative electrode", and the other ends of the first to eighth solar cell strings (hereinafter referred to as "second end") are "negative electrode", "negative electrode", "positive electrode", "positive electrode", and "positive electrode", respectively. They are "negative electrode", "negative electrode", "positive electrode", and "positive electrode". The first end of the first and second solar cell strings is provided by the first head bus bar 102, and the second end of the first to fourth solar cell strings is provided by the first tail bus bar 105. ~ The first end of the sixth solar cell string is by the second head bus bar 103, and the second end of the fifth to eighth solar cell strings is by the second tail bus bar 106, the seventh and seventh. The first end of the solar cell string of 8 is connected by a third head bus bar 104. Then, between the first and second solar cell strings, between the third and fourth solar cell strings, between the fifth and sixth solar cell strings, and between the seventh and eighth solar cell strings. They are connected in parallel to form a first solar cell string group, a second solar cell string group, a third solar cell string group, a fourth solar cell string group, and first to fourth solar cells. The strings are connected in series to form a cell circuit. The first head bus bar 102 draws out the positive electrode of the cell circuit, and the third head bus bar 104 draws out the negative electrode of the cell circuit. As shown in FIG. 3A, the half-cut module includes two junction boxes, a first junction box 108 and a second junction box 109, respectively. The first junction box 108 and the second junction box 109 are arranged on the backing plate 107, except that the first junction box 108 is formed by the third head bus bar 104 and the second head bus bar 103. Adjacent ends of the third head bus bar 104 and the second head bus bar 103 are arranged between them and are connected to two connectors of the first junction box 108 through the opening hole of the backing plate 107. The second junction box 109 is arranged between the second head portion bus bar 103 and the first head portion bus bar 102, and the second head portion bus bar 103 and the first head portion bus bar 102. Adjacent ends of the 102 are connected to two connectors of the second junction box 109 through an opening hole in the backing plate 107. The positive electrode cable 111 of the half-cut module is pulled out from the second junction box 109, and the negative electrode cable 110 of the half-cut module is pulled out from the first junction box 108.

In a preferred embodiment, the half-cut module comprises 120 half-cut cells, provided that the number of solar cell strings is eight, and each solar cell string comprises 15 half-cut cells. That is, the half-cut cells are arranged in 8 columns x 15 rows, or the half-cut module contains 144 half-cut cells, provided that the number of solar cell strings is eight. Each solar cell string contains 18 half-cut cells, i.e., the half-cut cells are arranged in 8 columns x 18 rows. If the length of the half-cut solar cell is 2a, the width is a, the length of the column in the cell array is defined as the length of the cell array, and the length of the row is defined as the width of the cell array, 120 half-cuts are defined from the above definition. The 8-column x 15-row cell array composed of cells has a length = 15a, width = 16a, and aspect ratio = 0.9375, and the 8-column x 18-row cell array composed of 144 half-cut cells is The length is 18a, the width is 16a, and the aspect ratio is 1.125. In the prior art, a 6-column x 20-row cell array composed of 120 half-cut cells has a length = 20a, a width = 12a, an aspect ratio = 1.6667, and is composed of 144 half-cut cells. The 6-column × 24-row cell array has a length = 24a, a width = 12a, and an aspect ratio = 2. When composed of half-cut cells of the same size, the 8-column x 15-row cell array and the 6-column x 20-row cell array have the same number of half-cut cells, but the former has an aspect ratio of 1. Similarly, the 8-column x 18-row cell array and the 6-column x 24-row cell array have the same number of half-cut cells, but it is clear that the former has an aspect ratio closer to 1. Since the size of the half-cut module matches the size of the cell array, when using half-cut cells of the same size, the 120 half-cut cells provided in the present invention are arranged so as to be 8 columns × 15 rows. The half-cut module configured in the same manner has an aspect ratio closer to 1 than the half-cut module configured by arranging 120 half-cut cells in 6 columns × 20 rows in the prior art. The half-cut module provided in the present invention, which is configured by arranging 144 half-cut cells in 8 columns × 18 rows, has 144 half-cut cells in 6 columns × 24 rows in the prior art. The aspect ratio is closer to 1 than the half-cut modules that are arranged so as to be. However, the half-cut module provided in the present invention, which is configured by arranging 120 half-cut cells in 8 columns × 15 rows, and 144 half-cut cells in 8 columns × 18 rows. The half-cut modules arranged in this way have an aspect ratio range of about 0.95 to 1.15. If the area of the cell array in the two half-cut modules is the same under the same conditions (for example, using the same bus bar), the closer the aspect ratio is to 1, the smaller the module area of the half-cut module. In other words, when using half-cut cells of the same size, the half-cut module composed of 120 half-cut cells provided in the present invention has a module area of 120 half-cut cells in the prior art. The half-cut module composed of 144 half-cut cells provided in the present invention, which is smaller than the module area of the half-cut module composed of, has a module area of 144 half-cut cells in the prior art. It is smaller than the module area of the composed half-cut module. When the battery power is the same, the smaller the module area, the higher the conversion efficiency of the module. Therefore, the conversion efficiency of the half-cut module composed of 120 half-cut cells provided in the present invention is higher than the conversion efficiency of the half-cut module composed of 120 half-cut cells in the prior art. The half-cut module composed of 144 half-cut cells provided in the present invention has a conversion efficiency higher than that of the half-cut module composed of 144 half-cut cells in the prior art. In other words, the half-cut module provided in the present invention has higher conversion efficiency, ensuring that the electrical performance parameters of the module are similar to those of conventional modules.

In one preferred embodiment, a bypass diode connected in parallel with the head bus bar connected to the junction box is arranged in each of the junction boxes in order to prevent or reduce the hot spot effect. Here, the half-cut modules shown in FIGS. 3A and 3B will be described as an example, and the first junction box 108 will be parallel to the second head bus bar 103 and the third head bus bar 104. A second bypass diode (not shown), which is connected, is connected to the second junction box 109 in parallel with the second head bus bar 103 and the first head bus bar 102. Bypass diode (not shown) is arranged. A schematic diagram of the electrical circuit of a half-cut module with bypass diodes connected in parallel can be referred to in FIG. 3 (c), where reference numeral 100 represents a half-cut cell, where the longer horizontal line is half-cut. The positive electrode of the cell, the shorter horizontal line represents the negative electrode of the half-cut cell, the reference numeral 108a represents the second bypass diode, and the reference numeral 109a represents the first bypass diode.

In a preferred embodiment, the half-cut module provided in the present invention further includes a back rail for fixing the half-cut module to the solar panel bracket. 4 (a) to 4 (f) are a right side view, a left side view, a front view, a rear view, a plan view, and a bottom view of the back rail in the half-cut module according to a specific embodiment of the present invention, respectively. ). As shown in the drawing, the back rail includes the rear plate 200, the front plate 201, the first connecting plate 202, and the fixing plate 203, and the upper end of the rear plate 200 and the upper end of the front plate 201 are fixedly connected. , The first connection plate 202 is arranged between the rear plate 200 and the front plate 201, and is fixedly connected to the rear plate 200 and the front plate 201, respectively, and the rear plate 200, the first connection plate 202, A receiving groove 205 for inserting the solar panel bracket is formed between the front plate 201 and the front plate 201, and the fixing plate 203 is arranged at the lower end of the front plate 201 and extends in a direction away from the rear plate 200. The fixing plate 203 is provided with a bolt mounting hole 206, and the back rail is fixedly connected to the backing plate in the half-cut module via the rear plate 200.

More preferably, the back rail further includes a second connecting plate 204, and the upper end of the rear plate 200 is fixedly connected to the upper end of the front plate 201 via the second connecting plate 204. Of course, the upper end of the rear plate 200 may be directly fixedly connected to the upper end of the front plate 201.

When the upper end of the front plate 201 is connected to the upper end of the rear plate 200 via the second connecting plate 204, even if the front plate 201 and the rear plate 200 are arranged in parallel, they are arranged at a constant angle. May be good. Preferably, the front plate 201 and the rear plate 200 are arranged at a constant angle. In the present specification, the fact that the front plate 201 and the rear plate 200 are arranged at a constant angle means that the upper end of the front plate 201 and the upper end of the rear plate 200 can be intersected by extending, and based on this, the front plate 201 can be intersected. The angle between the 201 and the rear plate 200 means the angle formed by extending and intersecting the upper end of the front plate 201 and the upper end of the rear plate 200. When the angle between the front plate 201 and the rear plate 200 is set to a certain angle, the lower end of the front plate 201 and the lower end of the rear plate 200 can be opened, that is, the receiving groove 205 can be opened. Then, the flange plate of the solar panel bracket is easily inserted into the receiving groove 205. When the upper end of the front plate 201 and the upper end of the rear plate 200 are directly fixedly connected, an angle is always formed between the front plate 200 and the rear plate 200. In one preferred embodiment, the range of the angle between the front plate 201 and the rear plate 200 is 3 ° to 5 °, such as 3 °, 4 °, 5 ° and the like.

The present invention has no limitation on the solar panel bracket suitable for the back rail. In a preferred embodiment, as shown in FIG. 5, the solar panel bracket comprises a web plate 301, a first flange plate 302, a second flange plate 303, and a flange side 304, provided that the first flange plate. The 302 and the second flange plate 303 are vertically connected to each of the two long sides of the web plate 301, and the first flange plate 302 and the second flange plate 303 are on the same side of the web plate 301. The first flange plate 302, the web plate 301, and the second flange plate 303 have a U-shaped structure. The first flange plate 302 has no flange side, and the end of the second flange plate 303 is a flange that is connected perpendicularly to the first flange plate 302 and extends in the direction of the first flange plate 302. Sides 304 are arranged. In order to sufficiently fix the back rail and the solar panel bracket shown in FIG. 5, the first connecting plate 202 in the back rail is arranged perpendicular to the rear plate 200, and the fixing plate 203 is also attached to the rear plate 200. The width of the first connecting plate 202 is set to be equal to or larger than the thickness of the first flange plate 302, and the vertical distance between the first connecting plate 202 and the fixing plate 203 is set to the first. The height of the flange plate 302 or less. Then, when the back rail is fixed to the solar panel bracket, when the first flange plate 302 in the solar panel bracket is inserted into the receiving groove 205, the width of the first connecting plate 202 is equal to or larger than the thickness of the first flange plate 302. Further, since the vertical distance between the first connecting plate 202 and the fixing plate 203 is equal to or less than the height of the first flange plate 302, the first flange plate 302 and the first connecting plate 202 ( That is, contact with the bottom of the receiving groove 205) can be generated, and further, when the back rail fixing plate 203 and the solar panel bracket web plate 301 are continuously tightened with bolts, the first flange plate 302 is connected. The acting force of the first connecting plate 202 can be generated, and the tightening property between the back rail and the solar panel bracket can be ensured. In particular, when the vertical distance between the first connecting plate 202 and the fixing plate 203 is exactly equal to the height of the first flange plate 302, the first flange plate 302 of the solar panel bracket is used as the receiving groove 205 of the back rail. When inserted into, the web plate 301 and the fixing plate 203 of the solar panel bracket will be closely attached to each other, so that the bolt mounting holes 206 in the fixing plate 203 and the mounting holes in the web plate 301 can be easily aligned with each other. It becomes easier to fix. The above solar panel bracket is only a preferred embodiment, and in other embodiments, the solar panel bracket may be U-shaped steel, C-shaped steel, or the like, but for the sake of brevity, they are not listed here one by one. However, it is clear to those skilled in the art.

Although the first connecting plate 202 is arranged between the rear plate 200 and the front plate 201, there is no limitation in the present specification regarding the specific arrangement position of the first connecting plate 202. Preferably, the first connecting plate 202 is located at the center position of the rear plate 200.

For members that do not need to be directly fixed to the double glazing photovoltaic module, such as the front plate 201, the first connecting plate 202, the second connecting plate 204 and the fixing plate 203, the first connecting plate 202, The force received by the second connecting plate 204 and the fixing plate 203 is larger than the force received by the front plate 201, so that the thickness of the first connecting plate 202, the second connecting plate 204, and the fixing plate 203 is increased. , It is larger than the thickness of the rear plate 200 and the front plate 201. In a preferred embodiment, the thickness range of the rear plate 200 and the front plate 201 is 1.5 mm to 3 mm, and the thickness range of the first connecting plate 202 and the second connecting plate 204 is 3 mm to 5 mm. Yes, the thickness range of the fixing plate 203 is 2 mm to 4 mm.

In order to reduce the weight of the back rail and the cost of the back rail, at least one of the first connecting plate 202, the second connecting plate 204, and the fixing plate 203 has a hollow structure in a preferred embodiment. Designed to. The design of the hollow structure can be realized by many means. Taking the structures shown in FIGS. 6A and 6B as an example, in the back rail, the first connecting plate 202, the second connecting plate 204, and the fixing plate 203 all have a hollow structure. However, the first connecting plate 202 has a through hole 211 penetrating along its length, and the second connecting plate 204 has a through hole 210 penetrating along its length. However, the fixing plate 203 is provided with a through hole 212 penetrating along the length thereof.

In one preferred embodiment, the back rail is manufactured by processing at once in an extrusion molding process, and the merit of integral molding is that it is easy to process. Further, the back rail is preferably made of an aluminum mold material. Aluminum profiles have the advantages of light weight and high corrosion resistance.

As shown in FIG. 7, the back rail is fixed to the backing plate 107 of the half-cut module with an adhesive such as silica gel so that the opening of the back rail receiving groove 205 turns its back to the junction box. The backing plate 107 of the half-cut module has a rectangular shape including a first opposite side and a second opposite side, and the first opposite side is two parallel first sides (sides A ₁ A ₄ and sides). A ₂ A ₃ ), the second opposite side includes two parallel second sides (sides A ₁ A ₂ and A ₄ A ₃ ), and the rear plate also includes the third opposite side and the fourth opposite side. The third opposite side is two parallel third sides (sides B ₁ B ₄ and side B ₂ B ₃ ), and the fourth opposite side is two parallel fourth sides. Includes sides (sides B ₁ B ₂ and sides B ₄ B ₃ ). The third side of the rear plate is parallel to the first side of the backing plate, the fourth side of the rear plate is parallel to the second side of the backing plate, but the third and fourth sides of the rear plate. The value of the ratio between the sides is equal to the value of the ratio between the first side and the second side of the backing plate 107. That is, the aspect ratios of the module and the back rail are the same. When the aspect ratio of the back rail and the aspect ratio of the module are the same, the vertical bending resistance and the horizontal bending resistance of the module are the same, and at that time, the mechanical load resistance of the module is the best. As described above, since the aspect ratio of the half-cut module is close to 1, the aspect ratio of the back rail is also close to 1. Preferably, the range of the length of the third side of the rear plate of the back rail is 6 cm to 12 cm, and the range of the width of the fourth side of the rear plate of the back rail is 6 cm to 13.5 cm.

The number of back rails is preferably four, and the four back rails (represented as back rails 2a, back rails 2b, back rails 2c, and back rails 2d, respectively) are perpendicular to the first opposite side. It is symmetrically distributed with respect to the bisector and with respect to the perpendicular bisector of the second opposite side. Specifically, as shown in FIG. 7, the vertical bisectors of the sides A ₁ A ₂ and the sides A ₄ A ₃ are set as the first axis, and the vertical bisectors of the sides A ₁ A ₄ and the sides A ₂ A ₃ are taken as the first axis. Assuming that the bisector is the second axis, the back rail 2a and the back rail 2b, and the back rail 2c and the back rail 2d are the back rail 2a, the back rail 2c, and the back rail 2b with respect to the first axis. The back rail 2d is symmetrically distributed with respect to the second axis. For each back rail, the specific position of the back rail on the back surface of the half-cut module is defined in the present specification by the distance between the two sides closest to the back rail and the back rail. In this specification, the center of the rear plate of the back rail (that is, the intersection of the two diagonal lines of the rear plate) is defined as the center of the back rail, and the center of the back rail and one side of the half-cut module are defined. The vertical distance is defined as the distance between the back rail and the side. Since the four back rails are symmetrically distributed, the specific arrangement positions of the back rails will be described below by taking only the back rail 2d as an example. As shown in the drawing, the two sides closest to the back rail 2d are sides A ₂ A ₃ and sides A ₄ A ₃ , where the distance between the back rail 2d and sides A ₄ A ₃ (ie, back). The distance between the rail and the second side closest to it is h, and the distance between the back rail 2d and the sides A ₂ A ₃ (ie, between the back rail and the closest first side). Distance) is represented by b. The length of side A ₄ A ₃ (that is, the length of the second side of the backing plate) is B, and the length of side A ₂ A ₃ (that is, the length of the first side of the backing plate) is H. It is represented by. Preferably, B / 5 <b <B / 4, H / 5 <h <H / 4. More preferably, b = B / 4.449 and h = H / 4.449.

When fixing the half-cut module to which the back rail is attached to the solar panel bracket, as shown in FIG. 8, first, the first flange plate 302 in which the flange side of the solar panel bracket shown in FIG. 5 is not provided. Is inserted into the receiving groove of the back rail so that the end surface of the first flange plate 302 is in contact with the first connecting plate 202, and the bolt mounting holes in the fixing plate 203 of the back rail and the web of the solar panel bracket. Adjust the solar panel bracket so that it is aligned with the mounting holes (not shown) on the plate 301, then pass the bolts 500 through the back rail bolt mounting holes and the solar panel bracket mounting holes, and finally. , The half-cut module is attached by tightening the nut 501 and fixing it between the back rail and the solar panel bracket.

The half-cut module provided by the present invention is obtained by the following manufacturing method.

Step 1 Form multiple solar cell strings. The number of solar cell strings is an integral multiple of 4, and each solar cell string is obtained by connecting a plurality of half-cut cells in series with an interconnect ribbon. However, the plurality of half-cut cells in each solar cell string are arranged in the short side direction of the half-cut cells.

Step 2 A transparent cover plate is laid on the laminated stage, and an upper layer sealing film is laid on the transparent cover plate.

Step 3 A plurality of solar cell strings are arranged side by side on the upper layer sealing film, two solar cell strings are formed into one group, and the positive and negative electrodes of the solar cell strings in each group are arranged in the same direction and adjacent to each other. The positive and negative electrodes of the solar cell strings in the two groups are arranged in opposite directions.

Step 4 The solar cell strings in each group are connected in parallel by a bus bar to form a solar cell string group, and the adjacent solar cell strings are connected in series by a bus bar so that the positive and negative electrodes are on the same side of the half-cut module. Form a cell circuit.

Step 5 A lower layer sealing film is laid, a backing plate is laid on the lower layer sealing film, and a bus bar on the same side as the positive and negative electrodes of the cell circuit is passed through the backing plate.

Step 6 Laminate the transparent cover plate, upper layer sealing film, cell circuit, lower layer sealing film, and backing plate.

Step 7 A junction box is attached to the backing plate on the same side as the positive and negative electrodes of the cell circuit, and the positive and negative electrodes of the cell circuit are pulled out from the junction box.

Step 8 Attach the back rail to the backing plate. Regarding the structure, size, number, and mounting position of the back rail, the contents of the corresponding parts described above can be referred to, and for the sake of brevity, duplicate description is omitted here.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary examples and that the present invention can be realized in another specific form without departing from the spirit and basic features of the present invention. is there. Therefore, the examples should be considered exemplary and non-limiting in all respects, and the scope of the invention is limited by the claims, not by the above description. Therefore, the meaning of the equivalents in the claims and all changes falling within the scope are included in the present invention. Any reference to the drawings in the claims should not be considered as limiting the scope of the invention. It goes without saying that the term "includes" does not exclude other members, units or steps, and the singular does not exclude a plurality. The plurality of members, units or devices described in the claims of the system may be realized by software or hardware in one member, unit or device.

In the half-cut module provided by the present invention, the number of solar cell strings is an integral multiple of 4, however, each of the solar cell strings consists of a plurality of half-cut cells connected in series. Are arranged in groups of two, the positive and negative electrodes of the solar cell strings in each group are arranged in the same direction, and the positive and negative electrodes of the solar cell strings in the two adjacent groups are arranged in opposite directions. The solar cell strings are connected in parallel by the bus bar to form a solar cell string group, and the adjacent solar cell strings are connected in series by the bus bar to form a cell circuit in which the positive and negative electrodes are on the same side of the half-cut module. However, the junction box is located on the same side as the positive and negative electrodes of the cell circuit, and the bus bar on the same side as the positive and negative electrodes of the cell circuit is connected inside the junction box and halved from inside the junction box. Pull out the positive and negative electrodes of the cut module. Since the positive and negative sides of the half-cut module provided in the present invention are drawn from the edge of the module, it is only necessary to make a hole at the edge of the backing plate, and a center drawer type half that makes a hole in the center of the conventional backing plate. Compared to the cut module, the half-cut module provided in the present invention can effectively reduce the stress in the opening hole and further effectively improve the mechanical load capacity of the module as a whole. In the half-cut module provided in the present invention, the positive and negative sides of the cell circuit are exactly on the same side of the module, so one bus bar that penetrates the conventional module from the head to the tail can be used to connect the positive and negative sides of the cell circuit. Compared to the edge-drawing type half-cut module which needs to be guided to the same side, the half-cut module provided by the present invention effectively reduces the area of the module and further effectively improves the conversion efficiency of the module. Can be made to. It should be noted that the half-cut provided in the present invention is compared with the edge-drawing type half-cut module which needs to guide the positive and negative electrodes of the cell circuit to the same side with one bus bar that penetrates the conventional module from the head to the tail. The module has a symmetrical structure and looks good. That is, the half-cut module provided by the present invention has the features of high reliability, high conversion efficiency, and good appearance.

The above description is only a few preferable examples of the present invention, and of course, the scope of claims of the present invention cannot be limited by this, so the invention is carried out based on the scope of the claims of the present invention. Equal modifications also fall within the scope of the present invention.

10 Half-cut cell 11, 12, 13 Bypass diode 14, 15, 16 Junction box 17, 18 Positive / negative cable 20 Half-cut cell 23 Bus bar 24, 25 Junction box 26, 27 Positive / negative cable 100 Half-cut cell 101 Transparent cover plate 102 1st head bus bar 103 2nd head bus bar 104 3rd head bus bar 105 1st tail bus bar 106 2nd tail bus bar 107 backing plate 108 1st junction box 108a 2nd bypass diode 109 Second junction box 109a First bypass diode 200 Rear plate 201 Front plate 202 First connection plate 203 Fixing plate 204 Second connection plate 205 Receiving groove 206 Bolt mounting hole 301 Web plate 302 First flange plate 303 Second 2 flange plate 304 flange side 500 bolt 501 nut

Claims (9)

A half-cut module comprising a transparent cover plate, a backing plate, a plurality of solar cell strings arranged between the transparent cover plate and the backing plate, and a junction box arranged on the backing plate.
The plurality of solar cell strings are arranged side by side, and each of the solar cell strings includes a plurality of half-cut cells connected in series and arranged in the short side direction of the half-cut cell.
The number of the solar cell strings is an integral multiple of 4, the solar cell strings are grouped into groups of two, and the positive and negative electrodes of the solar cell strings in each group are arranged in the same direction with each other in two adjacent groups. The positive and negative electrodes of the solar cell string are arranged in opposite directions to each other.
The solar cell strings in each group are connected in parallel by a bus bar to form a solar cell string group, and the adjacent solar cell strings are connected in series by a bus bar so that the positive and negative electrodes are on the same side of the half-cut module. Forming a cell circuit,
The junction box is arranged at a position on the same side as the positive and negative electrodes of the cell circuit, and the bus bar on the same side as the positive and negative electrodes of the cell circuit is connected to the junction box to form the junction box. Pull out the positive and negative electrodes of the half-cut module from inside ,
The half-cut module further includes a back rail including a rear plate, a front plate, a first connecting plate, and a fixing plate, and an upper end of the rear plate and an upper end of the front plate are fixedly connected to each other. The connection plate 1 is arranged between the rear plate and the front plate, and is fixedly connected to the rear plate and the front plate, respectively, and the rear plate, the first connection plate, and the front plate are fixed to each other. A receiving groove for inserting the solar panel bracket is formed between the plates, and the fixing plate is arranged at the lower end of the front plate and extends in a direction away from the rear plate. Is provided with a bolt mounting hole
A half-cut module in which the back rail is fixedly connected to the backing plate in the half-cut module via the rear plate . The solar cell string has an order of a first solar cell string, a second solar cell string, ..., A fourth N solar cell string, and so on.
The bus bars include a first head bus bar, a second head bus bar, ..., N + 1 head bus bars, which are N + 1 head bus bars, and a first tail bus bar and a second bus bar, respectively. Includes tail busbars, ..., N tail busbars, which are the Nth tail busbars.
The first end of the first and second solar cell strings is by the first head bus bar, and the first end of the 4n-1 to 4n + 2 solar cell strings is by the n + 1 head bus bar. -1, The first end of the 4N solar cell string is connected by the head bus bar of the N + 1 (where n = 1, 2, ..., N-1).
The second end of the 4th m + 1 to 4m + 4 solar cell strings is connected by the tail bus bar of the m + 1 (however, m = 0, 1, 2, ..., N-1).
The number of the junction boxes is N, and the N junction boxes are the first junction box, the second junction box, ..., The Nth junction box, and the kth junction box is , The k-th head bus bar and the k + 1 head bus bar on the backing plate are arranged at positions corresponding to the k-th head bus bar and the k + 1 head bus bar penetrate the backing plate. It is connected to the kth junction box (however, k = 1, 2, ..., N),
The positive and negative electrodes of the half-cut module are drawn out from the first junction box and the Nth junction box, respectively.
The half-cut module according to claim 1, wherein N is a natural number. The half-cut module includes eight said solar cell strings, each of which contains 15 half-cut cells, or
The half-cut module according to claim 2, wherein the half-cut module includes eight solar cell strings, each of which comprises 18 half-cut cells. The half-cut module according to claim 2, wherein in each of the junction boxes, a bypass diode connected in parallel with the head bus bar connected in the junction box is arranged. The half-cut according to claim 1 , wherein the back rail further includes a second connecting plate, and the upper end of the rear plate is connected to the upper end of the front plate via the second connecting plate. module. The half-cut module according to claim 1 , wherein the range of the deflection angle between the front plate and the rear plate is 3 ° to 5 °. The solar panel bracket includes a web plate, a first flange plate, a second flange plate, and a flange side, and the first flange plate and the second flange plate are two long sides of the web plate. The first flange plate, the web plate, and the second flange plate have a U-shaped structure, and the flange side is the end of the second flange plate. It is vertically connected to the first flange plate and extends toward the first flange plate.
Both the first connecting plate and the fixing plate are perpendicular to the rear plate, the width of the first connecting plate is equal to or larger than the thickness of the first flange plate, and the first connection is made. The half-cut module according to claim 1 , wherein the vertical distance between the plate and the fixing plate is equal to or less than the height of the first flange plate. The backing plate has a rectangular shape including a first opposite side and a second opposite side, the first opposite side includes two parallel first sides, and the second opposite side is parallel. Includes two second sides to
The rear plate has a rectangular shape including a third opposite side and a fourth opposite side, the third opposite side includes two parallel third sides, and the fourth opposite side is parallel. Includes two fourth sides to
The third side of the rear plate is parallel to the first side of the backing plate, the fourth side of the rear plate is parallel to the second side of the backing plate, and the third side of the rear plate is parallel. The half-cut module according to claim 5, wherein the ratio of the side to the fourth side is equal to the ratio of the first side to the second side of the backing plate. The number of the back rails is 4, and the four back rails are perpendicular bisectors of the first opposite side of the backing plate and perpendicular bisectors of the second opposite side of the backing plate. The seventh aspect of claim 7 , wherein the back rails are symmetrically distributed with respect to the bisector, and the respective arrangement positions of the back rails satisfy H / 5 <h <H / 4 and B / 5 <b <B / 4. Half-cut module:
However,
H: The length of the first side of the backing plate,
B: The length of the second side of the backing plate,
h: The distance between the back rail and the second side closest to it,
b: The distance between the back rail and the first side closest to it.

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