WO2011116557A1

WO2011116557A1 - Solar photovoltaic component, terminal box used thereof and diode structure used threrof

Info

Publication number: WO2011116557A1
Application number: PCT/CN2010/074586
Authority: WO
Inventors: 赵颜华
Original assignee: Zhao Yanhua
Priority date: 2010-03-26
Filing date: 2010-06-28
Publication date: 2011-09-29
Also published as: CN201673904U

Abstract

A solar photovoltaic component, a terminal box used thereof and a diode structure (1) used thereof are provided. The diode structure (1) comprises a diode chip (11), a first diode pin (12) and a second diode pin (13); wherein the diode chip (11), a part of the first diode pin (12) and a part of the second diode pin (13) are packaged in an insulating package body (14); a radiator (15) is configured on the insulating package body (14). The terminal box comprises a box body and the diode structure (1), and the insulating package body (14) of the diode structure (1) is configured out of the box body. The solar photovoltaic component comprises at least two said terminal boxes, and these two boxes are electrically connected by a convergence belt, which is inside the solar panel, wherein the terminal box has an anode output lead and a cathode output lead. The solar photovoltaic component, the terminal box and the diode structure (1) take advantages of low heat accumulation, enhanced heat dissipation, and the facilitation of the replacement of the diode structure (1).

Description

Solar photovoltaic module and junction box and diode structure therefor

The utility model relates to a four-wire box and an internal structure thereof, in particular to a junction box of a solar photovoltaic component and a diode structure therefor. Text

In the solar photovoltaic power generation system, the junction box of the solar photovoltaic module can realize the connection of the solar photovoltaic wafer lead and the external lead. In order to prevent the component from being shielded from generating electricity or a battery string failure of the component, the entire circuit can be protected to ensure that other batteries can work normally. Generally, a bypass diode is installed inside the junction box of the solar photovoltaic module. When the battery string fails or is partially shielded, the diode will conduct and the diode will heat up. Therefore, ensuring the effective heat dissipation of the diode in the junction box and the reliability of the diode connection become the key to the quality of the junction box of the solar photovoltaic module. The junction box of the existing solar photovoltaic module is provided with a bypass diode and a metal card terminal, and the metal card terminal is respectively connected or soldered to the lead pin of the diode through the connection portion, and the connection manner of the junction box of the structure is First, it is inconvenient to install. The diode should be soldered or snapped onto the metal terminal block and then installed in the junction box, which increases the difficulty of assembly and the difficulty of maintenance of the solar photovoltaic module in the later stage. Secondly, during use, the temperature inside the box rises. The damage of the box body and the easy fall of the solder joint may result in poor contact between the diode and the metal terminal, the performance of the diode chip is degraded, and the contact resistance of the card connection method may cause the temperature of the contact point to rise, and the stability of the diode conduction is lowered. This causes the use of the junction box to malfunction.

Summary of the invention

The utility model is inconvenient for the installation of the junction box of the existing solar photovoltaic module, and the assembly difficulty is Larger, and during use, due to the increase in diode temperature, the diode itself is damaged and the performance is degraded. Due to the excessive temperature of the diode, the junction box is damaged and the solder joint is easily detached, which will cause contact between the diode and the metal terminal. Poor, the stability of the diode conduction is reduced, thereby causing the failure of the use of the junction box, and a junction box of the solar photovoltaic module and the diode structure thereof.

In order to achieve the above object, the technical solution adopted by the utility model is as follows: a diode structure for a junction box of a solar photovoltaic module, the diode structure comprising a diode chip, the diode chip and the first diode pin and the second One end of the diode pin is connected to the diode chip, the first diode pin and the second diode pin are encapsulated in an insulating package; the first diode pin and the second diode tube The other end of the foot extends out of the insulating package and is provided with heat dissipation on the insulating package.

The utility model also provides a junction box of a solar photovoltaic module, comprising a box body, further comprising at least one diode structure as described above, wherein the first and second diode pins of the protruding diode structure insulation package body A diode mounting component is disposed in the housing; the insulating package of the diode structure is externally disposed on the housing.

Further, at least two terminals electrically connected to the diode mounting component are further disposed in the casing, and the terminal has a busbar mounting device, and the busbar mounting mechanism passes through an elastic piece or a bolt or a card The plate is either fixed in the terminal block or the busbar is fixed to the terminal block through the mounting hole. Further, a partition is disposed in the box body, the partition partitions the box into upper, middle and lower regions, and the upper region is a busbar mounting bin, the busbar is encapsulated in the bin; The diode component mounting compartment is encapsulated in the cartridge by the diode component pin and the junction box terminal; the lower area is the mounting area of the diode package. Further, the terminal has a positive and negative output lead, and the output lead is electrically connected to the terminal through a bolt or a connecting plate, and the positive and negative output wires pass through the through hole provided in the box, and are arranged between the through hole and the output lead. There are cable locking heads or cable glands or cable locking blocks.

Further, the diode mounting component includes at least two diode pin connection holes, and the first and second diode pins of the diode structure are latched on the diode tube through a diode clamping mechanism provided in the connection hole. The foot is connected to the hole.

Further, the diode clamping mechanism is composed of two elastic card slots arranged in parallel, and the diode pins are snapped into the elastic card slots, and the two elastic card slots are electrically connected to the terminals through the connecting pieces.

Further, the two diode pins of the diode structure are connected to the mounting component through a diode pin socket provided on the capacitor, and a sealing component is disposed on the diode pin socket.

Further, the at least one diode structure is provided with a heat sink and a heat insulation board, and the diode structure, the heat sink and the heat insulation board are both disposed in the ventilation shield, and the ventilation shield is connected with the box body, and the ventilation protection Ventilation holes are distributed on the surface of the cover and the casing. The shape of the vent hole may be in the form of a vertical strip, an oblique strip, or the like. This design of the vents, also known as concealed vents, maintains the overall effect of the entire junction box and allows the heat generated by the operation of the diode structure to be sent to the atmosphere.

Further, the box body has a cover and a box body, and the box cover is attached to the box body by bolts or clips. The utility model also includes a solar photovoltaic module, comprising a junction box as described above disposed on a solar panel, wherein the junction box is at least two junction boxes having a positive output lead and a junction box having a negative output lead, The two junction boxes are connected by a bus bar inside the solar panel, and the customer can increase the number of intermediate junction boxes according to the number of battery strings designed by the component.

The utility model has the beneficial effects that: the diode structure of the utility model is suitable for external solar energy The junction box of the photovoltaic module reduces the installation and fixing of the bypass-^ pole tube unit in the box, effectively solves the sealing of the pin and the box body when the diode is externally mounted, and reduces the pins of the adjacent diode unit. The contact resistance when the card is connected reduces the heat accumulation during the working of the contact point; each diode structure is an independent individual. Once a diode structure fails, it can be replaced at any time without opening the sealing cover of the box. The ventilating shield of the diode structure under the lower part; and in the natural environment, the heat generated by the operation of the diode structure can be timely dissipated into the natural environment, effectively reducing the work generated when the existing box is connected to the bypass diode. The heat can not be dissipated, the heat accumulation causes the risk of melting and burning of the box, and the heat generated by the diode structure is emitted into the environment, there is no problem of temperature rise inside the box; the diode structure is arranged in the ventilation cover, the ventilation effect Good, and can prevent the possibility of the diode structure from being impacted by the outside; at the same time effectively solved There are structural problems junction box diodes work once the heat generated can not dissipate in time, reducing the risk of heat damage leading to loss of function junction boxes and components damage. DRAWINGS

1 is a schematic structural view of a diode structure of the present invention;

Figure 2 is a schematic structural view of Embodiment 2 of the present invention;

Figure 3 is a schematic view showing the structure of the embodiment 2 after opening the cover;

4 is a cross-sectional structural view showing a diode mounting component and a terminal of Embodiment 2 of the present invention;

Figure 5 is a schematic structural view of Embodiment 3 of the present invention;

Figure 6 is a schematic structural view of Embodiment 4 of the present invention;

Figure 7 is a schematic structural view of Embodiment 5 of the present invention;

Figure 8 is a side cross-sectional structural view showing a fifth embodiment of the present invention;

Figure 9 is a schematic structural view of Embodiment 6 of the present invention;

Figure 10 is a side sectional structural view showing a sixth embodiment of the present invention; 11 is a schematic structural view of a solar photovoltaic module of the present invention; FIG. 12 is a schematic structural view of the solar photovoltaic module of the present invention. detailed description

The principles and features of the present invention are described in the following with reference to the accompanying drawings, which are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

Embodiment 1 : As shown in FIG. 1 , a diode structure 1 for a junction box of a solar photovoltaic module, the diode structure 1 includes a diode chip 11 , and the diode chip 11 and the first diode pin 12 and One end of the second diode pin 13 is connected; the diode chip 11, the first diode pin 12 and the second diode pin 13 are encapsulated in the insulating package 14; The other end of the diode pin 12 and the second diode pin 13 extends beyond the insulating package 14 , and the heat sink 15 is disposed on the insulating package 14 . The insulating package 14 has a U shape.

Embodiment 2: FIG. 2, FIG. 3, FIG. 4, the utility model also provides a junction box of a solar photovoltaic module, comprising a box body 2, further comprising five diode structures 1 described in Embodiment 1 Extending the diode structure insulation ^ "The first diode pin 12 and the second diode pin 13 of the package are connected to the diode mounting component 3 in the casing 2; the insulating structure of the diode structure The body 14 is externally disposed in the casing 2. The casing 2 is further provided with twelve terminals 4 electrically connected to the diode mounting component 3, and the terminal 4 has a busbar mounting mechanism. The busbar mounting mechanism fixes the busbar 41 in the terminal 4 by bolts. The terminal has positive and negative output wires 5, and the output wires 5 are electrically connected to the terminals through bolts, and the positive and negative output wires are pierced. a perforation is provided on the casing, and a cable locking head 21 is disposed between the perforation and the output wire. The diode mounting component 3 includes twelve diode pin connection holes, and the first and the Two diode pins pass through the connection holes 31 Chucking mechanism is provided with a diode 32 provided in the card connector hole 31 pin diode. The diode clamping mechanism 32 is composed of two parallel elastic slot The diode pin is connected to the elastic card slot, and the two elastic card slots are electrically connected to the terminal 4 through the connecting piece 33. The case 2 has a cover 22 and a case, and the cover 22 is placed on the case by bolts 23. The two diode pins of the diode structure 1 are connected to the diode mounting component 3 through a diode pin socket 24 provided in the casing 2, and a sealing component 25 is provided on the diode pin socket 24, and the sealing component is provided. It is generally sealed. The five diode structures 1 are provided with a heat sink 16 . The diode structure and the heat sink are disposed in the ventilation shield 26 . The ventilation shield 26 is connected to the casing 2 , and the ventilation shield 26 and the Ventilation holes 27 are distributed on the surface of the casing 2.

Embodiment 3: As in FIG. 5, the same as Embodiment 2, except that the diode structure 1 described in the third embodiment is included, and the diode mounting component 3 is further disposed in the casing 2 The six terminals 4 electrically connected to each other have a busbar mounting mechanism, and the busbars are fixed in the terminal 4 by the card 43.

Embodiment 4: As in FIG. 6, the same as Embodiment 2, except that the diode structure 1 described in Embodiment 1 is included, and the diode structure 1 and the diode mounting component provided in the casing 2 are included. The three phases are engaged, and two terminals 4 electrically connected to the diode mounting component 3 are also provided in the casing 2. A mounting hole is provided in the terminal 4, and the bus bar of the terminal 4 is fixed to the terminal through the mounting hole. The terminal 4 has positive and negative output wires 5, and the output wires 5 are electrically connected to the terminals through bolts. The positive and negative output wires pass through the through holes provided in the casing, and the cables are provided between the through holes and the output wires. Seal the crucible 28.

Embodiment 5: FIG. 7 and FIG. 8 are the same as Embodiment 2, except that the diode structure 1 described in the first embodiment is included, and the diode structure 1 and the casing 2 are provided. The diode mounting element 3 is snapped, and two terminals 4 electrically connected to the diode mounting element 3 are also provided in the housing 2. The terminal has a positive and negative output lead 5, and the output lead 5 is electrically connected to the terminal through a bolt, and the positive and negative output wires pass through the through hole provided in the box, and are worn. A cable locking block is provided between the hole and the output wire.

Embodiment 6: FIG. 9 and FIG. 10 are the same as Embodiment 1. The difference is that a partition 6 is disposed in the casing 2, and the partition divides the casing into upper, lower and lower regions. The upper area is the busbar mounting bin 61, the busbar is enclosed in the bin; the middle zone is the diode component pin mounting bin 62; and the lower zone is the diode component packing bin 64. The output wire is electrically connected to the terminal through the connection plate 63. The diode structure is provided with a heat sink and a heat shield.

Embodiment 7: As shown in FIG. 11 and FIG. 12, the utility model further comprises a solar photovoltaic module, comprising the junction box described in Embodiments 2 to 6 disposed on the solar panel backboard 7, and the wiring At least two boxes are connected, and the junction boxes are electrically connected by a bus bar 4 which is provided inside the solar panel.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and principles of the present invention, should be included in Within the scope of protection of the present invention.

Claims

'T'J - -

A diode structure for a junction box of a solar photovoltaic module, wherein the diode structure comprises a diode chip, and the diode chip is respectively connected to one end of the first diode pin and the second diode pin Connecting the diode chip, the first diode pin and the second diode pin in an insulating package; the other end of the first diode pin and the second diode pin are extended Outside the insulating package, a heat sink is disposed on the insulating package.

2. The diode structure for a junction box of a solar photovoltaic module according to claim 1, wherein the insulating package is formed in a shape.

A junction box for a solar photovoltaic module, comprising a casing, characterized by further comprising at least one diode structure according to claims 1 and ₂ , said first and the first of said protruding diode structure insulating package The diode pins are connected to the housing with diode mounting components; the insulating package of the diode structure is placed outside the housing.

4. The junction box of a solar photovoltaic module according to claim 3, wherein at least two terminals electrically connected to the diode mounting component are further disposed in the casing, and the terminal has a confluence With a mounting mechanism, the busbar mounting mechanism is fixed in the terminal through an elastic piece or a bolt or a card or directly fixed to the terminal through the mounting hole.

5. The junction box of a solar photovoltaic module according to claim 4, wherein a partition is disposed in the casing, and the partition divides the casing into upper, middle and lower regions, and the upper region is The busbar mounting bay, the busbar is packaged in the bin; the middle zone is a diode component mounting bin, the diode component pin and the junction box terminal are encapsulated in the bin; and the lower area is the mounting area of the diode package.

The junction box of a solar photovoltaic module according to claim 4, wherein the terminal has a positive and negative output lead, and the output lead is electrically connected to the terminal through a bolt or a connecting plate, and the positive and negative output wires Passing through the perforation provided in the box body, between the perforation and the output wire Cable locking head or cable gland or cable locking block.

7. The junction box of a solar photovoltaic module according to claim 3, wherein said diode mounting component comprises at least two diode pin connection holes, said first and second diodes of said diode structure The pin is clamped in the diode pin connection port through a diode clamping mechanism provided in the connection hole.

8. The junction box of a solar photovoltaic module according to claim 7, wherein the diode clamping mechanism is composed of two parallel elastic card slots, and the diode pins are connected to the elastic card slot, and two The elastic card slots are connected to the terminal through a connecting piece.

The junction box of the solar photovoltaic module according to any one of claims 3 to 8, wherein two diode pins of the diode structure pass through a diode pin socket provided on the casing and are mounted. The components are connected and a sealing element is provided on the diode pin socket.

The junction box of the solar photovoltaic module according to any one of claims 3 to 8, wherein the at least one diode structure is provided with a heat sink and/or a heat shield, a diode structure, a heat sink and a spacer. The hot plates are disposed in the ventilation cover, and the ventilation cover is connected to the casing, and the ventilation cover and the surface of the casing are distributed with ventilation holes.

A junction box for a solar photovoltaic module according to any one of claims 3 to 8, wherein the casing has a lid and a casing, and the casing is bolted or snapped onto the casing.

12. A solar photovoltaic module comprising a junction box according to claims 3 to 11 on a solar panel, wherein the junction box is at least two junction boxes having a positive output lead and having a negative pole The junction box of the output wire is connected between the two junction boxes through a bus bar inside the solar panel.