Photovoltaic junction box and photovoltaic module with same

Abstract

The utility model discloses a photovoltaic junction box and a photovoltaic assembly with the same. The photovoltaic junction box comprises a box body, a first conducting strip, a second conducting strip and a chip. A containing cavity is formed in the box body. The first conducting strips and the second conducting strips are arranged in the containing cavity and are arranged at intervals in the length direction of the box body. The chip is vertically arranged between the first conducting strip and the second conducting strip, and the chip is electrically connected with the first conducting strip and the second conducting strip. According to the photovoltaic junction box provided by the utility model, the chip is vertically arranged between the first conducting strip and the second conducting strip, so that the chip can be connected with the first conducting strip and the second conducting strip at the same time. Therefore, compared with a traditional photovoltaic junction box, the heat dissipation speed of the first conducting strip and the heat dissipation speed of the second conducting strip are consistent, the heat dissipation efficiency of the photovoltaic junction box is improved, and normal work of the photovoltaic junction box is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a photovoltaic junction box and a photovoltaic component having the same. Background Art

[0002] In the prior art, the chip in the photovoltaic junction box is connected to the conductive sheet by welding. Affected by the welding process, the positive electrode of the chip is welded on the positive conductive sheet, and the negative electrode of the chip is connected to the negative conductive sheet through an aluminum jumper, and finally the whole is plastic-sealed. However, since the chip is only located on the positive conductive sheet, when the chip is working, the heat generated is mainly conducted to the positive conductive sheet, and the negative conductive sheet conducts heat through the aluminum jumper, resulting in inconsistent heat dissipation rates of the positive conductive sheet and the negative conductive sheet, thereby making the heat dissipation of the photovoltaic junction box uneven, which is not conducive to the normal operation of the photovoltaic junction box. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a photovoltaic junction box, which makes the heat dissipation speed of the first conductive sheet and the second conductive sheet consistent, improves the heat dissipation efficiency of the photovoltaic junction box, and is conducive to the normal operation of the photovoltaic junction box.

[0004] Another object of the present invention is to provide a photovoltaic assembly using the photovoltaic junction box.

[0005] According to the photovoltaic junction box of the first embodiment of the utility model, the box body includes: a box body, the box body is formed with a accommodating cavity; a first conductive sheet and a second conductive sheet, the first conductive sheet and the second conductive sheet are both arranged in the accommodating cavity, and the first conductive sheet and the second conductive sheet are arranged at intervals along the length direction of the box body; a chip, the chip is vertically arranged between the first conductive sheet and the second conductive sheet, and the chip is electrically connected to the first conductive sheet and the second conductive sheet respectively.

[0006] According to the photovoltaic junction box of the first embodiment of the utility model, the chip is vertically arranged between the first conductive sheet and the second conductive sheet, so that the chip can be connected to the first conductive sheet and the second conductive sheet at the same time. Therefore, compared with the traditional photovoltaic junction box, the heat dissipation speed of the first conductive sheet and the second conductive sheet is consistent, the heat dissipation efficiency of the photovoltaic junction box is improved, and it is conducive to the normal operation of the photovoltaic junction box.

[0007] According to some embodiments of the present invention, the first conductive sheet includes a first conductive segment and a second conductive segment connected to each other, the first conductive segment extends along the length direction of the box body, the second conductive segment extends along the height direction of the box body, and the second conductive segment is in contact with the surface of the chip; and / or the second conductive sheet includes a third conductive segment and a fourth conductive segment connected to each other, the third conductive segment extends along the length direction of the box body, the fourth conductive segment extends along the height direction of the box body, and the fourth conductive segment is in contact with the surface of the chip.

[0008] According to some embodiments of the present invention, the first conductive segment includes a first sub-conductive segment and a second sub-conductive segment connected to each other, the second sub-conductive segment is located between the first sub-conductive segment and the second conductive segment, and a portion of the surface of the second sub-conductive segment on at least one side in the width direction of the box body is recessed to form a first groove; and / or the third conductive segment includes a third sub-conductive segment and a fourth sub-conductive segment connected to each other, the fourth sub-conductive segment is located between the third sub-conductive segment and the fourth conductive segment, and a portion of the surface of the fourth sub-conductive segment on at least one side in the width direction of the box body is recessed to form a second groove.

[0009] According to some embodiments of the present invention, the width of the first conductive segment in the width direction of the box body is greater than the width of the second conductive segment; and / or the width of the third conductive segment in the width direction of the box body is greater than the width of the fourth conductive segment.

[0010] According to some embodiments of the present invention, the chip is located on one side of the box body in the width direction, and the first conductive sheet and the second conductive sheet are symmetrical with respect to the chip.

[0011] According to some embodiments of the present invention, the photovoltaic junction box further includes: a packaging body, wherein the packaging body at least covers the outer peripheral surfaces of the chip, the second conductive segment, and the fourth conductive segment.

[0012] According to some embodiments of the present invention, the packaging body includes a first packaging segment and a second packaging segment connected to each other, the first packaging segment extends along the length direction of the box body, the first packaging segment covers a portion of the outer circumference of the first conductive segment and a portion of the outer circumference of the third conductive segment, and the second packaging segment extends along the height direction of the box body, the second packaging segment covers the outer circumference of the chip, the second conductive segment and the fourth conductive segment.

[0013] According to some embodiments of the present invention, the first conductive sheet further includes a fifth conductive segment, the fifth conductive segment is connected to a side of the first conductive segment away from the chip, and a free end of the fifth conductive segment abuts against the bottom wall of the box body; and / or the second conductive sheet further includes a sixth conductive segment, the sixth conductive segment is connected to a side of the third conductive segment away from the chip, and a free end of the sixth conductive segment abuts against the bottom wall of the box body.

[0014] According to some embodiments of the utility model, the photovoltaic junction box further includes: a first connector, which is arranged between the chip and the first conductive sheet; and a second connector, which is arranged between the chip and the second conductive sheet.

[0015] The photovoltaic assembly according to the second embodiment of the utility model includes the photovoltaic junction box according to the first embodiment of the utility model.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a cross-sectional view of a photovoltaic junction box according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 The enlarged view of the A part shown in the middle circle;

[0020] Figure 3 is a schematic diagram of a photovoltaic junction box according to an embodiment of the utility model, wherein the packaging body is not shown;

[0021] Figure 4 is a schematic diagram of a photovoltaic junction box according to an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of a photovoltaic junction box according to an embodiment of the utility model from another angle.

[0023] Reference numerals:

[0024] 100. Photovoltaic junction box;

[0025] 1. Box body; 11. Accommodating cavity; 2. First conductive sheet; 21. First conductive segment; 211. First sub-conductive segment; 212. Second sub-conductive segment; 2121. First groove; 22. Second conductive segment; 23. Fifth conductive segment; 3. Second conductive sheet; 31. Third conductive segment; 311. Third sub-conductive segment; 312. Fourth sub-conductive segment; 3121. Second groove; 32. Fourth conductive segment; 33. Sixth conductive segment; 4. Chip; 5. Package body; 51. First packaging segment; 52. Second packaging segment; 6. First connector; 7. Second connector. DETAILED DESCRIPTION

[0026] Reference below Figure 1-Figure 5 A photovoltaic junction box 100 according to an embodiment of the first aspect of the utility model is described.

[0027] like Figure 1-Figure 5 As shown, the photovoltaic junction box 100 according to the first embodiment of the utility model includes a box body 1, a first conductive sheet 2, a second conductive sheet 3 and a chip 4.

[0028] Specifically, the box body 1 is formed with a receiving cavity 11. The first conductive sheet 2 and the second conductive sheet 3 are both arranged in the receiving cavity 11, and the first conductive sheet 2 and the second conductive sheet 3 are arranged along the length direction of the box body 1 (for example, Figure 1 The chip 4 is vertically arranged between the first conductive sheet 2 and the second conductive sheet 3, and the chip 4 is electrically connected to the first conductive sheet 2 and the second conductive sheet 3 respectively.

[0029] For example, in Figure 1-Figure 5 In the example, the first conductive sheet 2 and the second conductive sheet 3 both extend along the length direction of the box body 1. The chip 4 is vertically arranged, and the first conductive sheet 2 and the second conductive sheet 3 are respectively located on both sides of the thickness direction of the chip 4. Among them, the positive electrode of the chip 4 can be connected to the first conductive sheet 2, and the negative electrode of the chip 4 is connected to the second conductive sheet 3, which increases the contact area between the chip 4 and the first conductive sheet 2 and the second conductive sheet 3.

[0030] When the photovoltaic junction box 100 is working, the chip 4 will generate heat. By placing the chip 4 vertically, the two side surfaces of the chip 4 in the thickness direction are respectively in contact with the first conductive sheet 2 and the second conductive sheet 3, so that the first conductive sheet 2 and the second conductive sheet 3 can both receive the heat dissipated by the chip 4, and the first conductive sheet 2 and the second conductive sheet 3 receive equal amounts of heat, thereby improving the heat conduction efficiency between the chip 4 and the first conductive sheet 2 and the second conductive sheet 3, making the heat dissipation speeds of the first conductive sheet 2 and the second conductive sheet 3 consistent, thereby improving the heat dissipation performance of the photovoltaic junction box 100 and facilitating the normal operation of the photovoltaic junction box 100.

[0031] According to the photovoltaic junction box 100 of the embodiment of the utility model, the chip 4 is vertically arranged between the first conductive sheet 2 and the second conductive sheet 3, so that the chip 4 can be simultaneously connected to the first conductive sheet 2 and the second conductive sheet 3. Therefore, compared with the traditional photovoltaic junction box, the heat dissipation speed of the first conductive sheet 2 and the second conductive sheet 3 is consistent, the heat dissipation efficiency of the photovoltaic junction box 100 is improved, and it is conducive to the normal operation of the photovoltaic junction box 100.

[0032] According to some embodiments of the present invention, Figure 1 As shown, the first conductive sheet 2 includes a first conductive segment 21 and a second conductive segment 22 connected to each other, the first conductive segment 21 extends along the length direction of the box body 1, and the second conductive segment 22 extends along the height direction of the box body 1 (for example, Figure 1 The second conductive sheet 3 includes a third conductive segment 31 and a fourth conductive segment 32 connected to each other, the third conductive segment 31 extends along the length direction of the box body 1, the fourth conductive segment 32 extends along the height direction of the box body 1, and the fourth conductive segment 32 is in contact with the surface of the chip 4.

[0033] Reference Figure 1-Figure 3 , the second conductive segment 22 is located at one end of the first conductive segment 21 adjacent to the chip 4 in the length direction, and the second conductive segment 22 is electrically connected to the chip 4. The fourth conductive segment 32 is located at one end of the third conductive segment 31 adjacent to the chip 4 in the length direction, and the fourth conductive segment 32 is electrically connected to the chip 4. At this time, the shape of the first conductive sheet 2 and the shape of the second conductive sheet 3 are both roughly L-shaped, the chip 4 is vertically arranged between the second conductive segment 22 and the fourth conductive segment 32, and the second conductive segment 22 and the fourth conductive segment 32 are both extended along the height direction of the box body 1, which increases the contact area between the chip 4 and the second conductive segment 22 and the fourth conductive segment 32, so that the heat transferred from the chip 4 to the second conductive segment 22 and the fourth conductive segment 32 is equal, which is conducive to keeping the heat dissipation rate of the first conductive sheet 2 and the second conductive sheet 3 consistent, and increases the area of ​​the first conductive sheet 2 and the second conductive sheet 3, thereby improving the heat dissipation efficiency of the photovoltaic junction box 100.

[0034] Further, the first conductive segment 21 includes a first sub-conductive segment 211 and a second sub-conductive segment 212 connected to each other, the second sub-conductive segment 212 is located between the first sub-conductive segment 211 and the second conductive segment 22, and a portion of the surface of the second sub-conductive segment 212 on at least one side in the width direction of the box body 1 is recessed to form a first groove 2121; and / or the third conductive segment 31 includes a third sub-conductive segment 311 and a fourth sub-conductive segment 312 connected to each other, the fourth sub-conductive segment 312 is located between the third sub-conductive segment 311 and the fourth conductive segment 32, and a portion of the surface of the fourth sub-conductive segment 312 on at least one side in the width direction of the box body 1 is recessed to form a second groove 3121.

[0035] like Figure 1-Figure 3 As shown, the second sub-conductive segment 212 and the first sub-conductive segment 211 both extend along the length direction of the box body 1, and the two ends of the second sub-conductive segment 212 in the length direction are respectively connected to the first sub-conductive segment 211 and the second conductive segment 22. The first groove 2121 can be formed only on one side of the second sub-conductive segment 212 in the width direction (not shown in the figure), or the first groove 2121 can also be formed on both sides of the second sub-conductive segment 212 in the width direction (as shown in the figure). Figure 1 shown).

[0036] like Figure 1-Figure 3 As shown, the fourth sub-conductive segment 312 and the third sub-conductive segment 311 both extend along the length direction of the box body 1, and the two ends of the fourth sub-conductive segment 312 in the length direction are respectively connected to the third sub-conductive segment 311 and the fourth conductive segment 32. The second groove 3121 can be formed only on one side of the fourth sub-conductive segment 312 in the width direction (not shown in the figure), or the second groove 3121 can also be formed on both sides of the fourth sub-conductive segment 312 in the width direction (as shown in the figure). Figure 1 shown).

[0037] Specifically, Figure 1 As shown, first grooves 2121 are formed on both sides of the width direction of the second sub-conductive segment 212, and second grooves 3121 are formed on both sides of the width direction of the fourth sub-conductive segment 312, so that the shapes of the second sub-conductive segment 212 and the fourth sub-conductive segment 312 are waist drum-shaped. Such an arrangement can ensure that the first conductive sheet 2 and the second conductive sheet 3 are electrically connected to the chip 4, and play a good supporting role on the chip 4, preventing the chip 4 from breaking, and extending the service life of the chip 4.

[0038] According to some embodiments of the present invention, the width of the first conductive segment 21 in the width direction of the box body 1 is greater than the width of the second conductive segment 22; and / or the width of the third conductive segment 31 in the width direction of the box body 1 is greater than the width of the fourth conductive segment 32. Figure 1-Figure 3 In the example, the width of the second conductive segment 22 and the width of the fourth conductive segment 32 are small, which reduces the pressure exerted by the second conductive segment 22 and the fourth conductive segment 32 on the chip 4, thereby preventing the chip 4 from breaking. At the same time, the material used for the first conductive sheet 2 and the second conductive sheet 3 is reduced, thereby reducing the production cost.

[0039] According to some embodiments of the present invention, referring to Figure 1-Figure 3, the chip 4 is located on one side of the width direction of the box body 1, the first conductive sheet 2 and the second conductive sheet 3 are symmetrical about the chip 4, that is, the second conductive segment 22 and the fourth conductive segment 32 are symmetrical about the chip 4, and the second sub-conductive segment 212 and the fourth sub-conductive segment 312 are symmetrical about the chip 4. As a result, the contact area between the chip 4 and the second conductive segment 22 and the fourth conductive segment 32 is equal, so that the heat received by the second conductive segment 22 and the fourth conductive segment 32 is also equal, so that the heat dissipation rate of the chip 4, the first conductive sheet 2 and the second conductive sheet 3 is equal. At the same time, the symmetrical arrangement of the first conductive sheet 2 and the second conductive sheet 3 makes the forces on both sides of the chip 4 in the thickness direction equal, thereby improving the support and protection of the chip 4.

[0040] According to some embodiments of the present invention, the photovoltaic junction box 100 further includes a packaging body 5, which at least covers the outer peripheral surfaces of the chip 4, the second conductive segment 22 and the fourth conductive segment 32. Figure 1 , Figure 4 and Figure 5 As shown, by packaging the outer circumference of the chip 4, the second conductive segment 22 and the fourth conductive segment 32, the chip 4, the second conductive segment 22 and the fourth conductive segment 32 can be sealed, and the chip 4 is fixed. At the same time, the packaging body 5 has thermal conductivity, which can improve the heat dissipation efficiency of the chip 4, the second conductive segment 22 and the fourth conductive segment 32.

[0041] According to some embodiments of the present utility model, the packaging body 5 includes a first packaging segment 51 and a second packaging segment 52 connected to each other, the first packaging segment 51 extends along the length direction of the box body 1, and the first packaging segment 51 covers a portion of the outer circumference of the first conductive segment 21 and a portion of the outer circumference of the third conductive segment 31, and the second packaging segment 52 extends along the height direction of the box body 1, and the second packaging segment 52 covers the outer circumference of the chip 4, the second conductive segment 22 and the fourth conductive segment 32.

[0042] For example, in Figure 1 , Figure 4 and Figure 5 In the example, the first encapsulation segment 51 and the second encapsulation segment 52 form a T-shaped structure, and the first encapsulation segment 51 extends from a portion of the outer circumference of the first conductive segment 21 to a portion of the outer circumference of the third conductive segment 31. This arrangement reduces the casting volume, ensures the sealing of the chip 4, reduces the damage to the chip 4 caused by the internal stress generated during the package cooling, and prolongs the service life of the chip 4.

[0043] It should be noted that the packaging body 5 is integrally cast at high temperature using epoxy resin.

[0044] According to some embodiments of the present invention, the first conductive sheet 2 further includes a fifth conductive segment 23, which is connected to a side of the first conductive segment 21 away from the chip 4, and a free end of the fifth conductive segment 23 abuts against the bottom wall of the box body 1; and / or the second conductive sheet 3 further includes a sixth conductive segment 33, which is connected to a side of the third conductive segment 31 away from the chip 4, and a free end of the sixth conductive segment 33 abuts against the bottom wall of the box body 1.

[0045] Reference Figure 1 , the fifth conductive segment 23 extends along the height direction of the box body 1, and the fifth conductive segment 23 is parallel to the second conductive segment 22. One end of the fifth conductive segment 23 in the height direction abuts against the bottom wall of the box body 1 to support the first conductive sheet 2. The sixth conductive segment 33 extends along the height direction of the box body 1, and the sixth conductive segment 33 is parallel to the fourth conductive segment 32. One end of the sixth conductive segment 33 in the height direction abuts against the bottom wall of the box body 1 to support the second conductive sheet 3. Thus, the first conductive sheet 2 and the second conductive sheet 3 can be stably supported in the accommodating cavity 11, further increasing the area of ​​the first conductive sheet 2 and the second conductive sheet 3, and improving the heat dissipation efficiency of the first conductive sheet 2 and the second conductive sheet 3.

[0046] According to some embodiments of the present invention, the photovoltaic junction box 100 further includes a first connector 6 and a second connector 7. The first connector 6 is disposed between the chip 4 and the first conductive sheet 2. The second connector 7 is disposed between the chip 4 and the second conductive sheet. Figure 1 As shown, the first connector 6 and the second connector 7 are respectively arranged on both sides of the thickness direction of the chip 4. The first connector 6 fixes the chip 4 with the second conductive segment 22, and the second connector 7 fixes the chip 4 with the fourth conductive segment 32. The first connector 6 and the second connector 7 can both be welding pieces. Such an arrangement increases the connection stability between the chip 4 and the second conductive segment 22 and the fourth conductive segment 32, and also enhances the structural strength of the photovoltaic junction box 100.

[0047] A photovoltaic assembly (not shown) according to an embodiment of the second aspect of the utility model comprises a photovoltaic junction box 100 according to an embodiment of the first aspect of the utility model.

[0048] The photovoltaic assembly according to the embodiment of the utility model improves the heat dissipation efficiency of the photovoltaic assembly by adopting the photovoltaic junction box 100, avoids damage to the photovoltaic assembly due to long-term high temperature, and prolongs the service life of the photovoltaic assembly.

[0049] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A photovoltaic junction box, characterized in that: include: A box body, wherein the box body is formed with a receiving cavity; A first conductive sheet and a second conductive sheet, wherein the first conductive sheet and the second conductive sheet are both disposed in the accommodating cavity, and the first conductive sheet and the second conductive sheet are arranged at intervals along the length direction of the box body; A chip is vertically arranged between the first conductive sheet and the second conductive sheet, and the chip is electrically connected to the first conductive sheet and the second conductive sheet respectively.

2. The photovoltaic junction box according to claim 1, characterized in that: The first conductive sheet comprises a first conductive segment and a second conductive segment connected to each other, the first conductive segment extends along the length direction of the box body, the second conductive segment extends along the height direction of the box body, and the second conductive segment is in contact with the surface of the chip; and / or The second conductive sheet includes a third conductive segment and a fourth conductive segment connected to each other, the third conductive segment extends along the length direction of the box body, the fourth conductive segment extends along the height direction of the box body, and the fourth conductive segment is in contact with the surface of the chip.

3. The photovoltaic junction box according to claim 2, characterized in that: The first conductive segment includes a first sub-conductive segment and a second sub-conductive segment connected to each other, the second sub-conductive segment is located between the first sub-conductive segment and the second sub-conductive segment, and a portion of the surface of at least one side of the second sub-conductive segment in the width direction of the box body is recessed to form a first groove; and / or The third conductive segment includes a third sub-conductive segment and a fourth sub-conductive segment connected to each other, the fourth sub-conductive segment is located between the third sub-conductive segment and the fourth conductive segment, and a portion of the surface of at least one side of the fourth sub-conductive segment in the width direction of the box body is recessed to form a second groove.

4. The photovoltaic junction box according to claim 3, characterized in that: The width of the first conductive segment in the width direction of the box body is greater than the width of the second conductive segment; and / or The width of the third conductive segment in the width direction of the box body is greater than the width of the fourth conductive segment.

5. The photovoltaic junction box according to claim 2, characterized in that: The chip is located at one side of the box body in a width direction, and the first conductive sheet and the second conductive sheet are symmetrical with respect to the chip.

6. The photovoltaic junction box according to claim 5, characterized in that: Also includes: A packaging body, wherein the packaging body at least covers the outer peripheral surfaces of the chip, the second conductive segment and the fourth conductive segment.

7. The photovoltaic junction box according to claim 6, characterized in that: The packaging body includes a first packaging segment and a second packaging segment connected to each other, the first packaging segment extends along the length direction of the box body, the first packaging segment covers a portion of the outer circumference of the first conductive segment and a portion of the outer circumference of the third conductive segment, the second packaging segment extends along the height direction of the box body, and the second packaging segment covers the outer circumference of the chip, the second conductive segment and the fourth conductive segment.

8. The photovoltaic junction box according to any one of claims 2 to 7, characterized in that: The first conductive sheet further includes a fifth conductive segment, the fifth conductive segment is connected to a side of the first conductive segment away from the chip, and a free end of the fifth conductive segment abuts against a bottom wall of the box body; and / or The second conductive sheet further includes a sixth conductive segment, the sixth conductive segment is connected to a side of the third conductive segment away from the chip, and a free end of the sixth conductive segment abuts against a bottom wall of the box body.

9. The photovoltaic junction box according to claim 1, characterized in that: Also includes: a first connecting member, the first connecting member being arranged between the chip and the first conductive sheet; A second connecting member is provided between the chip and the second conductive sheet.

10. A photovoltaic module, characterized in that: It comprises the photovoltaic junction box according to any one of claims 1-9.

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