Solar cell module with hidden gap

Abstract

The utility model discloses a solar cell module with hidden gaps, which comprises a plurality of cell pieces, the cell pieces are arranged along a first direction to form cell strings, and the plurality of cell strings are arranged along a second direction to form cell units; in the same battery string, the back surfaces of the battery pieces are electrically connected through first conductive parts, a first gap is formed between every two adjacent battery pieces, a second gap is formed between every two adjacent battery units, and the second conductive parts are located in the second gaps; the first shielding strip can cover the first gap so as to shield the first conductive part, and the second shielding strip can cover the second conductive part so as to shield the second conductive part. According to the utility model, the gap between the battery piece and the battery string can be shielded, the glass does not need to be gridded, the welding strip and the bus bar can be effectively hidden, and the consistency of the front appearance is improved.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, and in particular to a solar cell module with a hidden gap. Background Technology

[0002] Back-contact solar modules typically consist of the following layered structure from front to back: front glass layer, front film layer, cell stack layer, back film layer, and backsheet. The cell stack layer includes multiple electrically connected cell strings, each composed of multiple interconnected solar cells. These cells are connected by solder ribbons, and the cell strings are connected by busbars. Because there are gaps between adjacent cell strings and between adjacent cell strings themselves, these gaps expose the solder ribbons and busbars on the front of the cells, resulting in a poor overall appearance. Furthermore, since the front of the solar cells is usually dark blue or black, while the solder ribbons and busbars are usually silver-white, the significant color difference can easily create noticeable color contrasts on the front of the module, leading to inconsistent color and affecting the overall appearance of the front of the module. To address these issues, some products on the market employ a shielding coating on the front glass layer to cover exposed solder ribbons and busbars. However, this approach requires creating a grid pattern on the front glass layer, with the shielding coating applied intermittently at corresponding positions on the solder ribbons and busbars to form a grid. To achieve effective shielding, the gaps in the shielding coating are typically larger than the actual spacing. While this can achieve complete shading, it reduces the light-receiving area on the front of the solar cell, impacting its efficiency. Furthermore, at wider viewing angles, the shielding coating still fails to effectively shield the solder ribbons and busbars. Consequently, existing solar cell modules cannot effectively shield the solder ribbons and busbars, resulting in poor uniformity in the front appearance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a solar cell module with hidden gaps, which can block the gaps between the cells and the cell strings, and does not require the glass to be meshed, which can effectively hide the solder strips and busbars and improve the consistency of the front appearance.

[0004] To address the aforementioned technical problems, this utility model provides a solar cell module with a hidden gap, comprising multiple solar cells arranged along a first direction to form a cell string, and multiple cell strings arranged along a second direction to form a cell unit; within the same cell string, the back sides of the solar cells are electrically connected via a first conductive element, and a first gap is provided between adjacent solar cells, the first conductive element being disposed along the first direction; adjacent cell units are electrically connected via a second conductive element, and a second gap is provided between adjacent cell units, the second conductive element being disposed along the second direction and located within the second gap, the first direction and the second direction being perpendicular to each other.

[0005] It also includes a first shielding strip, which is disposed along the second direction and spans across the adjacent battery cells in the first direction. The first conductive element is disposed on the side of the first shielding strip away from the front of the battery cell. The first shielding strip can cover the first gap to shield the first conductive element.

[0006] It also includes a second shielding strip, which is disposed between adjacent battery cells along the second direction. The second conductive element is disposed on the side of the second shielding strip away from the front of the battery cell. The second shielding strip can cover the second conductive element to shield the second conductive element.

[0007] As an improvement to the above solution, the first shielding strip is provided with a first fixing layer, the side of the first fixing layer overlaps with the edge of the battery cell and forms an adhesive, and the overlap width is not less than 0.5mm.

[0008] As an improvement to the above solution, the first shielding strip is further provided with a first reflective layer, which is located on the side of the first fixing layer away from the battery cell.

[0009] As an improvement to the above solution, the first shielding strip is further provided with a first isolation layer, which is located on the side of the first reflective layer away from the first fixing layer, and the first conductive element can abut against the first isolation layer.

[0010] As an improvement to the above solution, within the second gap, the first conductive element extends from the side of the battery cell formed by the battery sheet and is electrically connected to the second conductive element. A second shielding strip is provided within the second gap, with the two side edges of the second shielding strip abutting against the back edges of the battery sheets of two adjacent battery cells. Both the first conductive element and the second conductive element can abut against the side of the second shielding strip closest to the back of the battery sheet. The second shielding strip can simultaneously shield the first conductive element extending into the second gap and the second conductive element located within the second gap.

[0011] As an improvement to the above solution, within the second gap, the first conductive element extends from the side of the battery cell formed by the battery sheet and is electrically connected to the second conductive element. The second gap is provided with the first shielding strip and the second shielding strip. The two side edges of the second shielding strip are respectively provided with a third gap between them and the battery sheets of two adjacent battery cells. The first conductive element can abut against the side of the first shielding strip away from the back of the battery sheet. The first shielding strip can cover the third gap to shield the first conductive element. The second conductive element is connected to the side of the second shielding strip away from the back of the battery sheet. The second shielding strip can shield the second conductive element within the second gap.

[0012] As an improvement to the above solution, within the second gap, the side of the second shielding strip overlaps with the side of the first shielding strip and forms an adhesive bond, and the overlap width between the second shielding strip and the first shielding strip is not less than 1 mm.

[0013] As an improvement to the above solution, the second shielding strip is provided with a second fixing layer, the span of the second fixing layer in the first direction is greater than the span of the second conductive element in the first direction, and the second conductive element can be adhered to the second fixing layer.

[0014] As an improvement to the above solution, the second shielding strip is further provided with a second reflective layer, which is located on the side of the second fixing layer near the front of the battery cell.

[0015] As an improvement to the above solution, the second shielding strip is further provided with a second isolation layer, which is disposed between the second reflective layer and the second fixing layer.

[0016] Implementing this utility model has the following beneficial effects:

[0017] This utility model discloses a solar cell module with hidden gaps, comprising multiple solar cells connected by a first conductive element to form a battery string. Within the same battery string, a first gap is provided between adjacent solar cells, and the first conductive element is disposed within the first gap. Multiple battery strings can form a battery cell, and adjacent battery cells are electrically connected by a second conductive element. A second gap is provided between adjacent battery cells, and the second conductive element is disposed within the second gap. To shield and hide the first gap and the first conductive element, this utility model discloses a solar cell module with hidden gaps, comprising a first shielding strip. Viewed from the front, the first shielding strip covers the first gap to shield the first conductive element. Similarly, to shield and hide the second gap and the second conductive element, this utility model discloses a solar cell module with hidden gaps, comprising a second shielding strip. Viewed from the front, the second shielding strip covers the second conductive element to shield the second conductive element. Therefore, the solar cell module with hidden gaps of this invention can shield the gaps between the cells and the cell strings. Moreover, the shielding structure is set on the cells rather than on the glass plate, so there is no need to mesh the glass. It can effectively hide the solder strips and busbars, thereby improving the consistency of the front appearance. Attached Figure Description

[0018] Figure 1 This is a partial front view of the solar cell module with hidden gaps according to this utility model.

[0019] Figure 2 This is a partial structural diagram of the back of the solar cell module with hidden gaps according to this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the first shielding strip of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the first embodiment of the cooperation between the second shielding strip and the battery cell of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the second embodiment of the cooperation between the second shielding strip and the battery cell of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the second shielding strip of this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0025] See Figure 1 and Figure 2 This utility model discloses a solar cell module with hidden gaps, including multiple solar cells 111. The solar cells 111 are arranged along a first direction to form a battery string 11, and the multiple battery strings 11 are arranged along a second direction to form a battery cell 1. The battery cell 1 includes multiple battery strings 11 arranged along the second direction. In the same battery string 11, the back sides of the solar cells 111 are electrically connected by a first conductive member 2. A first gap 6 is provided between adjacent solar cells 111. The first conductive member 2 is arranged along the first direction, specifically, the first conductive member 2 is connected in series or in parallel with adjacent solar cells 111 along the first direction. Adjacent battery cells 1 are electrically connected by a second conductive member 3. A second gap 7 is provided between adjacent battery cells 1. The second conductive member 3 is arranged along the second direction and located within the second gap 7. Specifically, the second conductive member 3 is connected in series or in parallel with the first conductive member 2 led out between adjacent battery strings 11 along the second direction. The first direction and the second direction are perpendicular to each other, and the arrangement directions of the first conductive member 2 and the second conductive member 3 are perpendicular to each other.

[0026] In order to shield the first conductive element 2 exposed in the first gap 6 and improve the uniformity of the front appearance of the solar cell module, the solar cell module with hidden gap also includes a first shielding strip 4. The first shielding strip 4 is arranged along the second direction and spans across the adjacent solar cells 111 in the first direction. That is, the length direction of the first shielding strip 4 is arranged along the second direction, the width direction of the first shielding strip 4 is arranged along the first direction and can span across the adjacent solar cells 111, and the first conductive element 2 is located on the side of the first shielding strip 4 away from the front of the solar cell 111. The first shielding strip 4 can cover the first gap 6 to shield the first conductive element 2, so it can shield the first conductive element 2 from the front.

[0027] The solar cell module with the hidden gap also includes a second shielding strip 5, which is disposed between adjacent cell cells 1 along the second direction. The second shielding strip 5 can contact the first shielding strip 4 or directly contact the cell 111. The second conductive element 3 is disposed on the side of the second shielding strip 5 away from the front of the cell 111. The second shielding strip 5 can cover the second conductive element 3 to shield the second conductive element 3, thus shielding the second conductive element 3 from the front.

[0028] The beneficial effects of this utility model embodiment are as follows:

[0029] The solar cell module with hidden gaps according to this embodiment of the present invention has multiple battery cells 111. The battery cells 111 are connected to form a battery string 11 by a first conductive member 2. In the same battery string 11, a first gap 6 is provided between adjacent battery cells 111, wherein the first conductive member 2 is disposed in the first gap 6. The multiple battery strings 11 can form a battery cell 1. Adjacent battery cells 1 are electrically connected by a second conductive member 3. A second gap 7 is provided between adjacent battery cells 1, and the second conductive member 3 is disposed in the second gap 7. In order to shield and hide the first gap 6 and the first conductive member 2, the solar cell module with hidden gaps according to this invention has a first shielding strip 4. When viewed from the front, the first shielding strip 4 can cover the first gap 6 to shield the first conductive member 2. In order to shield and hide the second gap 7 and the second conductive member 3, the solar cell module with hidden gaps according to this invention has a second shielding strip 5. When viewed from the front, the second shielding strip 5 can cover the second conductive member 3 to shield the second conductive member 3. Therefore, the solar cell module with hidden gap of this utility model can block the gap between the cell 111 and the cell string 11. Moreover, the blocking structure is set on the cell 111 instead of the glass plate. Therefore, there is no need to mesh the glass, which can effectively hide the solder strip and busbar, thereby improving the consistency of the front appearance.

[0030] Specifically, see Figure 3The first shielding strip 4 is provided with a first fixing layer 41. The side of the first fixing layer 41 overlaps with the edge of the battery cell 111 and forms an adhesive bond. The span of the first fixing layer 41 in the first direction is greater than the span of the first conductive element 2 in the first direction, that is, the width of the first fixing layer 41 in the first direction is greater than the width of the first conductive element 2 in the first direction. The first fixing layer 41 can both shield the first conductive element 2 and form an adhesive bond with the battery cell 111. The overlap width between the first fixing layer 41 and the battery cell 111 is not less than 0.5 mm.

[0031] The first shielding strip 4 is also provided with a first reflective layer 42. In the first shielding strip 4, the first fixing layer 41 is a transparent layer, and the first shielding strip 4 is also provided with a first reflective layer 42. The first reflective layer 42 is provided on the side of the first fixing layer 41 away from the battery cell 111, that is, the first fixing layer 41 is provided on the back of the battery cell 111, and the first reflective layer 42 is provided on the back side of the first fixing layer 41. In this way, the light entering the gap between the battery cells 111 will pass through the first fixing layer 41 and fall onto the first reflective layer 42, and then be reflected out by the first reflective layer 42, so that the light can return to the front of the battery cell 111 and improve the light utilization rate.

[0032] The first shielding strip 4 is also provided with a first isolation layer 43. The first isolation layer 43 is disposed on the side of the first reflective layer 42 away from the first fixing layer 41, that is, the first reflective layer 42 is disposed between the first fixing layer 41 and the first isolation layer 43. The first isolation layer 43 reinforces the first shielding strip 4. By placing the first isolation layer 43 on the side of the first reflective layer 42 away from the first fixing layer 41, light passing through the first fixing layer 41 can fall directly onto the first reflective layer 42 without having to pass through the first isolation layer 43, thus reducing light loss. On the other hand, before lamination or string bonding, the first conductive element 2 can abut against the first isolation layer 43. The first conductive element 2 is not easily displaced under the abutment of the first isolation layer 43, thereby achieving a pre-positioning effect for the first conductive element 2.

[0033] See Figure 4In the first embodiment, the second shielding strip 5 can cover the entire second gap 7. Specifically, within the second gap 7, the first conductive element 2 extends from the side of the battery cell 1 formed by the battery sheet 111 and is electrically connected to the second conductive element 3. Part of the first conductive element 2 is exposed in the second gap 7. The second gap 7 is provided with a second shielding strip 5, which can cover the entire second gap 7. The two side edges of the second shielding strip 5 abut against the back edges of the battery sheets 111 of two adjacent battery cells 1, achieving the effect of completely covering the second gap 7. Before lamination or string bonding, the first conductive element 2 and the second conductive element 3 located in the second gap 7 can abut against the side of the second shielding strip 5 near the back of the battery sheet 111, thereby pre-positioning the first conductive element 2 and the second conductive element 3 and preventing the first conductive element 2 and the second conductive element 3 from shifting. Therefore, on the one hand, the second shielding strip 5 can simultaneously shield the first conductive element 2 leading out into the second gap 7 and the second conductive element 3 located in the second gap 7, and on the other hand, it can also preposition the first conductive element 2 and the second conductive element 3.

[0034] See Figure 5 In the second embodiment, the first shielding strip 4 and the second shielding strip 5 together shield the second gap 7. Specifically, within the second gap 7, the first conductive element 2 extends from the side of the battery cell 1 formed by the battery sheet 111 and is electrically connected to the second conductive element 3. The second gap 7 is provided with the first shielding strip 4 and the second shielding strip 5. The second shielding strip 5 does not directly contact the battery sheet 111. The two side edges of the second shielding strip 5 are respectively provided with a third gap 8 between the battery sheet 111 of two adjacent battery cells 1. The front of the first shielding strip 4 first abuts against the battery sheet 111. The second shielding strip 5 is then bonded to the front side of the first shielding strip 4 at the back edge of the battery cell 111. The first conductive element 2 is able to abut against the side of the first shielding strip 4 away from the back of the battery cell 111. The first shielding strip 4 can cover the third gap 8 to shield the first conductive element 2 and form a pre-position for the first conductive element 2. The second conductive element 3 is connected to the side of the second shielding strip 5 away from the back of the battery cell 111. The second shielding strip 5 can shield the second conductive element 3 in the second gap 7 and form a pre-position for the second conductive element 3.

[0035] In the second embodiment, within the second gap 7, the side of the second shielding strip 5 overlaps with the side of the first shielding strip 4 and forms an adhesive bond, and the overlap width between the second shielding strip 5 and the first shielding strip 4 is not less than 1 mm.

[0036] See Figure 4-Figure 6 The second shielding strip 5 is provided with a second fixing layer 51. The span of the second fixing layer 51 in the first direction is greater than the span of the second conductive element 3 in the first direction, that is, the width of the second fixing layer 51 in the first direction is greater than the width of the second conductive element 3 in the first direction. The second fixing layer 51 can not only shield the second conductive element 3, but also form an adhesive fixation by overlapping the second fixing layer 51 with the battery cell 111 or the first shielding strip 4.

[0037] See Figure 6 The second shielding strip 5 is also provided with a second reflective layer 52. The second reflective layer 52 is provided on the side of the second fixing layer 51 near the front of the battery cell 111. That is, the second reflective layer 52 is provided on the front of the second fixing layer 51 so that the light entering the gap between the battery cells 111 will fall directly onto the second reflective layer 52 without passing through the second fixing layer 51, and then be reflected out by the second reflective layer 52, so that the light can return to the front of the battery cell 111, thereby reducing light loss and improving light utilization.

[0038] The second shielding strip 5 is also provided with a second isolation layer 53. The second isolation layer 53 is disposed between the second reflective layer 52 and the second fixing layer 51. The second isolation layer 53 reinforces the second shielding strip 5. By disposing of the second isolation layer 53 between the second reflective layer 52 and the second fixing layer 51, light passing through the second fixing layer 51 can fall directly onto the second reflective layer 52 without having to pass through the second isolation layer 53, thus reducing light loss.

[0039] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also considered to be within the protection scope of the present utility model.

Claims

1. A solar cell module with concealed gaps, characterized in that, The device includes multiple battery cells, which are arranged along a first direction to form a battery string, and multiple battery strings are arranged along a second direction to form a battery cell. In the same battery string, the back sides of the battery cells are electrically connected by a first conductive element, and a first gap is provided between adjacent battery cells. The first conductive element is arranged along the first direction. Adjacent battery cells are electrically connected by a second conductive element, and a second gap is provided between adjacent battery cells. The second conductive element is arranged along the second direction and located within the second gap. The first direction and the second direction are perpendicular to each other. It also includes a first shielding strip, which is disposed along the second direction and spans across the adjacent battery cells in the first direction. The first conductive element is disposed on the side of the first shielding strip away from the front of the battery cell. The first shielding strip can cover the first gap to shield the first conductive element. It also includes a second shielding strip, which is disposed between adjacent battery cells along the second direction. The second conductive element is disposed on the side of the second shielding strip away from the front of the battery cell. The second shielding strip can cover the second conductive element to shield the second conductive element.

2. The solar cell module with concealed gaps according to claim 1, characterized in that, The first shielding strip has a first fixing layer, the side of the first fixing layer overlaps with the edge of the battery cell and forms an adhesive, and the overlap width is not less than 0.5mm.

3. The solar cell module with concealed gaps according to claim 2, characterized in that, The first shielding strip is also provided with a first reflective layer, which is located on the side of the first fixing layer away from the battery cell.

4. The solar cell module with concealed gaps according to claim 3, characterized in that, The first shielding strip is also provided with a first isolation layer, which is located on the side of the first reflective layer away from the first fixing layer, and the first conductive element can abut against the first isolation layer.

5. The solar cell module with concealed gaps according to claim 1, characterized in that, Within the second gap, the first conductive element extends from the side of the battery cell formed by the battery sheet and is electrically connected to the second conductive element. A second shielding strip is provided within the second gap. The two sides of the second shielding strip abut against the back edges of the battery sheets of two adjacent battery cells. Both the first conductive element and the second conductive element abut against the side of the second shielding strip closest to the back of the battery sheet. The second shielding strip can simultaneously shield the first conductive element extending into the second gap and the second conductive element located within the second gap.

6. The solar cell module with concealed gaps according to claim 1, characterized in that, Within the second gap, the first conductive element extends from the side of the battery cell formed by the battery sheet and is electrically connected to the second conductive element. The second gap is provided with the first shielding strip and the second shielding strip. The two sides of the second shielding strip are respectively provided with a third gap between the battery sheet of two adjacent battery cells. The first conductive element can abut against the side of the first shielding strip away from the back of the battery sheet. The first shielding strip can cover the third gap to shield the first conductive element. The second conductive element is connected to the side of the second shielding strip away from the back of the battery sheet. The second shielding strip can shield the second conductive element within the second gap.

7. The solar cell module with concealed gaps according to claim 6, characterized in that, Within the second gap, the side of the second shielding strip overlaps with the side of the first shielding strip and forms an adhesive bond, and the overlap width between the second shielding strip and the first shielding strip is not less than 1 mm.

8. The solar cell module with concealed gaps according to claim 1, characterized in that, The second shielding strip is provided with a second fixing layer, the span of the second fixing layer in the first direction is greater than the span of the second conductive element in the first direction, and the second conductive element can be adhered to the second fixing layer.

9. The solar cell module with concealed gaps according to claim 8, characterized in that, The second shielding strip is also provided with a second reflective layer, which is located on the side of the second fixing layer near the front of the battery cell.

10. The solar cell module with concealed gaps according to claim 9, characterized in that, The second shielding strip is also provided with a second isolation layer, which is disposed between the second reflective layer and the second fixing layer.

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