WO2019227567A1

WO2019227567A1 - Ultra-narrow photovoltaic junction box with miniature power management module

Info

Publication number: WO2019227567A1
Application number: PCT/CN2018/094169
Authority: WO
Inventors: 邰小俊; 蔡慧明
Original assignee: 苏州同泰新能源科技有限公司
Priority date: 2018-05-31
Filing date: 2018-07-03
Publication date: 2019-12-05
Also published as: CN108616258B; CN108616258A

Abstract

An ultra-narrow photovoltaic junction box with a miniature power management module, comprising an ultra-narrow photovoltaic junction box body. The ultra-narrow photovoltaic junction box body includes a positive pole box body, an interpole box body and a negative pole box body; each of the positive pole box body, the interpole box body and the negative pole box body comprises a box body and a box cover, and the box cover is fixed at the top of the box body; a bus bar leading-in opening is formed on the bottom of each box body, and a guiding boss is disposed in the middle of the bus bar leading-in opening; the miniature power management module is disposed in the box body, and comprises a framework and a diode chip, the diode chip being packaged on the framework by means of a plastic sealing body; a first bus bar leading-out hole and a second bus bar leading-out hole are formed on the framework; and the bus bar leading-in opening covers the first bus bar leading-out hole and the second bus bar leading-out hole.

Description

Ultra-narrow photovoltaic junction box with miniature power management module

Technical field

The invention relates to the technical field of photovoltaic accessories, in particular to an ultra-narrow photovoltaic junction box with a miniature power management module.

Background technique

Solar energy is a renewable resource. Photovoltaic modules are widely used in solar power generation, and photovoltaic junction boxes are used to interconnect photovoltaic modules with external power modules and output the power of photovoltaic modules to the outside. When the internal battery of the photovoltaic module appears to be cracked or blocked by shadows to generate a hot spot effect, the Schottky diode assembled in the photovoltaic module junction box acts as a bypass protection device for the photovoltaic module, thereby ensuring the normal operation of the photovoltaic module.

Most photovoltaic modules on the market are single-glass modules with glass on the front, photovoltaic cells in the middle, and a backplane structure. Only the front side can receive solar energy for charging. Its junction box generally uses an integrated junction box. With the technological innovation, double-glass double-sided power generation modules are gradually promoted on the market. The front and back sides are both glass. The use of photovoltaic cells in the middle can convert solar light into electricity. At present, the mainstream method is to install a three-piece junction box on the back of the module. However, the three-junction junction box on the market now takes into consideration the reasons for the heat dissipation of the diode. When ensuring sufficient heat dissipation space, the box size is relatively large. The hot spot effect of the double-glass double-sided power generation module causes serious power consumption of the double-glass double-sided power module. The general solution now is to increase the glass size of the double-glass double-sided power generation module, so as to ensure that the junction box is large enough to install the control without blocking the back battery. Therefore, the prior art has the following defects: (1) Considering the heat dissipation of the diode, when ensuring a sufficient heat dissipation space, the size of the box is large, which causes the power of the double-glass double-sided component to be seriously consumed; (2) increasing the glass size After that, it will cause a significant increase in the cost of double-glass double-sided power generation components, which is not conducive to the promotion of green energy for photovoltaic power generation; (3) it is not easy to operate when the solar bus is introduced in and out of the junction box, and it is easy to contact and cause short circuits; (4) ) Existing diode chips are connected to the conductor by soldering or by auxiliary components, and heat is dissipated through the pins of the diode chip, resulting in a high temperature rise of the diode chip and easy damage.

Summary of the Invention

Aiming at the shortcomings of the prior art, the object of the present invention is to provide an ultra-narrow photovoltaic junction box with a miniature power management module, which has a small size and is suitable for a double-glass double-sided power generation module with auxiliary introduction and extraction of solar energy. The characteristics of the busbar, easy to operate when introducing and pulling out the solar busbar, prevent short circuits, and at the same time solve the problem of high temperature rise and easy damage of the diode chip.

In order to achieve the above object, the technical solution adopted by the present invention is as follows: an ultra-narrow photovoltaic junction box with a micro power management module, including:

Ultra-narrow photovoltaic junction box body, the ultra-narrow photovoltaic junction box body includes a positive electrode box body, an intermediate box body, and a negative electrode box body, and the positive electrode box body, the intermediate box body, and the negative electrode box body all include a box body and a box cover. The box cover is fixedly disposed on the top of the box body; a bus bar introduction port is provided at the bottom of the box body, and a guide protrusion is provided in the middle of the bus bar introduction port; one end of the positive electrode box body and the negative electrode box body is provided There is a cable line for accommodating the fastening channel, and the cable line is arranged in the corresponding box body through the pressing block; one end of the cable line is located in the corresponding box body, and the other end extends out of the corresponding box body;

The miniature power management module is disposed in the box body and includes a frame and a diode chip. A first electrode terminal is provided on a left portion of the frame, and a second electrode terminal is provided on a right portion; between the first electrode terminal and the second electrode terminal. A diode chip is provided, and the diode chip is packaged on the frame through a plastic package; the frame is provided with a first busbar lead-out hole and a second busbelt lead-out hole, wherein the first busbelt lead-out hole is provided at the first electrode Between the terminal and the molded body, the second bus-belt lead-out hole is disposed between the second electrode terminal and the molded body;

The busbar inlet covers the first busbar outlet and the second busbar outlet.

As a preferred solution, a first introduction channel and a second introduction channel are respectively formed at both ends of the guide boss and the bus inlet, and the first introduction channel and the second introduction channel are provided along the introduction direction for the bus belt to pass through. The first mounting hole and the second mounting hole.

As a preferred solution, the cross section of the guide boss is in an inverted triangle shape, wherein the sides where the two waists of the inverted triangle are located are the first guide slope and the second guide slope of the guide boss; the first introduction channel is formed by The first guide slope is formed with the end of the bus inlet, and the second introduction channel is formed by the second guide slope and the end of the bus inlet, and is the same as the first introduction channel and symmetrically arranged.

As a preferred solution, a diameter of the first mounting hole is larger than a diameter of the second mounting hole.

As a preferred solution, the right end of the cable of the positive case is connected to the first electrode terminal on the corresponding micro power management module, and the cable extends to the left of the positive case; The left end of the cable is connected to the second electrode terminal on the corresponding micro power management module, and the cable extends to the right outside the negative box.

As a preferred solution, the diode chip has a P junction and an N junction, the N junction of the diode chip is electrically connected to the second electrode terminal, and the P junction of the diode chip is electrically connected to the first electrode terminal through a jumper.

As a preferred solution, one side of the first electrode terminal is provided with a connecting slot, and the other side is stepped. The second electrode terminal has the same structure as the first electrode terminal, and is the same as the first electrode. The terminals are arranged symmetrically.

As a preferred solution, a buckle corresponding to a card slot for fixing a micro power management module is provided inside the box body, and the micro power management module is connected to the buckle through the card slot to form a micro power management module and Connection of ultra-narrow photovoltaic junction box body.

As a preferred solution, the plastic package body has a hexagonal structure, and the first electrode terminal and the second electrode terminal are embedded in the plastic package body by an embedded method and the plastic package body is separated into an upper plastic package portion with a trapezoidal cross section and The lower plastic sealing section with an inverted trapezoidal cross section; wherein the slope of the lower plastic sealing section with an inverted trapezoidal waist is the auxiliary guide inclined plane.

As a preferred solution, a solar bus bar is further included, and the solar bus bar is connected to adjacent solar cell groups; the adjacent solar bus bars are led out from the bus bar inlet after being led out, respectively, from the first bus bar outlet holes / The second busbar lead-out hole is connected to the first electrode terminal / the second electrode terminal.

Compared with the prior art, the present invention has the beneficial effects that the present invention is smaller in size and suitable for double-glass and double-sided power generation modules, and has the characteristics of assisting in and out of the solar bus belt. Prevent short circuit, and solve the problem of high temperature rise and easy damage of the diode chip.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a miniature power management module in the present invention;

2 is a top view of a miniature power management module in the present invention;

3 is a front view of a miniature power management module in the present invention;

4 is an internal view of a package body of a micro power management module according to the present invention;

5 is a front view of an ultra-narrow photovoltaic junction box body in the present invention;

6 is a top view of an ultra-narrow photovoltaic junction box body in the present invention;

7 is a bottom view of the ultra-narrow photovoltaic junction box body in the present invention;

FIG. 8 is an exploded view of an ultra-narrow photovoltaic junction box with a miniature power management module in the present invention.

Detailed ways

The present invention is further described below with reference to specific embodiments. The following embodiments are only used to explain the technical solution of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

Example 1:

As shown in FIGS. 1 to 4, a miniature power management module includes a frame and a diode chip 11. A first electrode terminal 12 is provided on a left portion of the frame, and a second electrode terminal 13 is provided on a right portion. The diode chip 11 is provided. The diode chip 11 is provided between the first electrode terminal 12 and the second electrode terminal 13. The diode chip 11 has a P junction and an N junction. The N junction of the diode chip 11 is electrically connected to the second electrode terminal 13. The P junction is electrically connected to the first electrode terminal 12 through a jumper 15; the diode chip 11 is packaged on a frame through a plastic package 14, and the frame is provided with a first busbar lead-out hole 16 and a second busbelt lead-out hole. 17; wherein the first busbar lead-out hole 16 is provided between the first electrode terminal 12 and the plastic package 14, and the second busbelt lead-out hole 17 is provided between the second electrode terminal 13 and the plastic package 14.

Preferably, one side of the first electrode terminal 12 is provided with a connecting slot 18 and the other side is stepped. The second electrode terminal 13 has the same structure as the first electrode terminal 12 and is the same as the first electrode terminal 12. The electrode terminals 12 are arranged symmetrically. The electrode terminal is used for connection with the solar bus belt and the cable 212, and the card slot 18 is used for fixed connection with the ultra-narrow photovoltaic junction box body 2.

Preferably, the frame is a long flat structure, and the frame is made of metal copper. Adopting a long flat structure can greatly reduce the size of the micro power management module 1 while ensuring heat dissipation.

Preferably, the plastic package body 14 has a hexagonal structure, and the first electrode terminal 12 and the second electrode terminal 13 are embedded in the plastic package body 14 in an embedded manner and divide the plastic package body 14 into a trapezoidal section. The plastic sealing portion 141 and the lower plastic sealing portion 142 having an inverted trapezoidal cross-section; wherein the lower plastic sealing portion 142 has an inverted trapezoidal cross-section and the inclined plane on which the waist is located is an auxiliary guiding inclined plane 143; an angle formed by the auxiliary guiding inclined plane 143 and the frame It is 30 ° to 60 °. The auxiliary guide inclined surface 143 can better complete the introduction and extraction of the solar confluence zone.

Preferably, the plastic packaging body 14 is made of epoxy resin material, which has good plastic packaging performance and long service life.

Preferably, the diode chip 11 is a Schottky diode chip.

Preferably, the jumper 15 is made of metallic copper.

Preferably, the miniature power management module 1 is disposed in an ultra-narrow photovoltaic junction box body 2.

The miniature power management module 1 of this embodiment not only generates less heat, dissipates heat better, and is less prone to melting and thermal damage.

Example 2:

As shown in FIGS. 5 to 7, an ultra-narrow photovoltaic junction box body includes a box body 24 and a box cover 25. The box cover 25 is fixedly disposed on the top of the box body 24; a bus is provided on the bottom of the box body 24. With a lead-in port 26, a guide boss 27 is provided in the middle of the bus-port inlet 26; the guide boss 27 and the two ends of the bus-port inlet 26 respectively form a first introduction channel 28 and a second introduction channel 29, wherein The first introduction channel 28 and the second introduction channel 29 are provided along the introduction direction with a first installation hole 210 and a second installation hole 211 through which the busbar passes.

Preferably, the cross section of the guide protrusion 27 is an inverted triangle, wherein the surfaces of the two waists of the inverted triangle are the first guide slope 214 and the second guide slope 215 of the guide protrusion 27; the first introduction channel 28 is formed by the first guide slope 214 and the end of the bus inlet 26; the second introduction channel 29 is formed by the second guide slope 215 and the end of the bus inlet 26, and is structured with the first introduction channel 28 Identical and symmetrical settings. Specifically, the structure provided with the guide boss 27 can prevent a short circuit, and the use of the guide slope and the combination with the auxiliary guide slope 143 of the plastic body 14 can better complete the introduction and extraction of the solar busbar.

Preferably, a diameter of the first mounting hole 210 is larger than a diameter of the second mounting hole 211. Wherein, the position of the second mounting hole 211 is consistent with the position of the bus bar lead-out hole.

Preferably, the bottom of the box body 24 is provided with a connected filling hole 216 for filling the potting glue.

Preferably, a demolding hole 217 is provided at the bottom of the box body 24 to facilitate demolding of the box body 24.

Preferably, a buckle for fixing the micro power management module 1 is provided inside the box body 24 for fixing the micro power management module 1.

Preferably, one end of the box body 24 is provided with a cable 212 to receive the fastening channel, and the cable line 212 is provided in the corresponding box body 24 by a pressing block 213; one end of the cable line 212 is located in the corresponding box body 24 The other end extends outside the corresponding box body 24.

Preferably, the right end of the cable 212 of the box body 24 is the positive box body 21 is connected to the corresponding micro power management module 1, and the cable line 212 extends to the left outside the positive box body 21; the box body 24 The left end of the cable 212 which is the negative electrode box body 23 is connected to the corresponding micro power management module 1, and the cable line 212 extends to the right outside the negative electrode box body 23. Among them, the cable 212 is connected to the electrode terminal by an intermediate frequency welding method. Such a welding method is stronger and better in heat dissipation.

The junction box body of this embodiment has the characteristics of being small in size and suitable for a double-glass double-sided power generation module, and at the same time, it is easy to operate when introducing and pulling out a solar bus belt to prevent a short circuit.

Example 3:

As shown in Figures 1 to 8, an ultra-narrow photovoltaic junction box with a miniature power management module, including

Ultra-narrow photovoltaic junction box body, the ultra-narrow photovoltaic junction box body includes a positive case 21, an intermediate case 22, and a negative case 23, and the positive case 21, the intermediate case 22, and the negative case 23 each include a case The body 24 and the box cover 25 are fixedly disposed on the top of the box body 24; the bottom of the box body 24 is provided with a bus bar introduction port 26, and a guide protrusion is provided in the middle of the bus bar introduction port 26 27; one end of the positive electrode box 21 and the negative electrode box 23 is provided with a cable 212 to accommodate a fastening channel, and the cable 212 is provided in the corresponding box 24 through a pressing block 213; one end of the cable 212 is located at Inside the corresponding box body 24, the other end extends outside the corresponding box body 24;

The miniature power management module 1 is disposed in a box body 24 and includes a frame and a diode chip 11. A first electrode terminal 12 is provided on a left portion of the frame, and a second electrode terminal 13 is provided on a right portion. The first electrode terminal 12 A diode chip 11 is provided between the second electrode terminal 13 and the diode chip 11 and is packaged on the frame by a plastic package 14. The frame is provided with a first busbar lead-out hole 16 and a second busbelt lead-out hole 17. The first busbar lead-out hole 16 is provided between the first electrode terminal 12 and the plastic package 14, and the second busbelt lead-out hole 17 is provided between the second electrode terminal 13 and the plastic package 14;

The busbar inlet 26 covers the first busbar outlet 16 and the second busbar outlet 17.

Preferably, it further includes a solar busbar, which is connected to adjacent solar cell groups; the adjacent solar busbars are led out from the busbar inlet 26 after being led out, respectively, from the first busbar outlet holes 16 / The two bus strip lead-out holes 17 are connected to the first electrode terminal 12 / the second electrode terminal 13.

As a preferred embodiment, the micro power management module 1 in the embodiment 1 is adopted, and the micro power management module 1 is snapped into the ultra-narrow photovoltaic junction box body 2 in the embodiment 2. More specifically, the present invention It includes at least four solar buses, including a first solar bus, a second solar bus, a third solar bus, and a fourth solar bus, which are sequentially connected to adjacent solar cell groups. The first solar bus At the first electrode terminal 12 provided with the cable 212 connected to the positive electrode case 21, the first solar bus strip passes through the first installation hole 210 and the second of the first introduction channel 28 of the positive case 21 in the upward direction in order. The mounting hole 211, and then the top end of the first solar bus bar passes through the first bus bar lead-out hole 16 of the micro power management module 1 in the positive electrode box body 21 and is fixed to the first electrode terminal 12 by welding; the second solar bus bar The first mounting hole 210 and the second mounting hole 211 of the second introduction channel 29 of the box body 24 with the one end close to the first solar busbar upward pass through the positive electrode box 21, and then the top of the second solar busbar The end passes through the second busbar lead-out hole 17 of the micro power management module 1 in the positive electrode box body 21 and is fixed to the second electrode terminal 13 by welding; an end of the second solar busbar near the third solar busbar passes upward Pass the first mounting hole 210 and the second mounting hole 211 of the first introduction channel 28 of the box body 24 of the middle box body 22, and then the top end of the second solar bus belt passes through the first of the micro power management module 1 in the middle box body 22. A bus strip lead-out hole 16 is welded and fixed to the first electrode terminal 12; an end of the third solar bus strip near the second solar bus strip passes through the box body 24 of the middle box body 22 and the second lead-in channel 29 first. A mounting hole 210 and a second mounting hole 211, and then the top end of the third solar bus bar passes through the second bus bar lead-out hole 17 of the micro power management module 1 in the middle box 22 and is fixed to the second electrode terminal 13 by welding. ; One end of the third solar bus belt close to the fourth solar bus belt passes through the first mounting hole 210 and the second mounting hole 211 of the first introduction channel 28 of the box body 24 of the negative electrode box 23 upward, and then the third solar bus Bring The end passes through the first busbar lead-out hole 16 of the miniature power management module 1 in the negative electrode case 23 and is fixed to the first electrode terminal 12 by welding; the fourth solar busbar is provided for connecting the negative case 23 The second electrode terminal 13 of the cable 212, the fourth solar busbar, pass through the first mounting hole 210 and the second mounting hole 211 of the second introduction channel 29 of the negative box 23 and the box 24 of the negative box 23 in order, and then the fourth solar bus The top end of the belt passes through the second bus-belt lead-out hole 17 of the miniature power management module 1 in the negative electrode case 23 and is fixed to the second electrode terminal 13 by welding. The invention effectively prevents a short circuit by physically blocking the solar bus belt.

The above is only a preferred embodiment of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the technical principles of the present invention, several improvements and deformations can be made. These improvements and deformations It should also be regarded as the protection scope of the present invention.

Claims

An ultra-narrow photovoltaic junction box with a miniature power management module, which is characterized by:

Ultra-narrow photovoltaic junction box body, the ultra-narrow photovoltaic junction box body includes a positive electrode box body, an intermediate box body, and a negative electrode box body, and the positive electrode box body, the intermediate box body, and the negative electrode box body all include a box body and a box cover. The box cover is fixedly disposed on the top of the box body; a bus bar introduction port is provided at the bottom of the box body, and a guide protrusion is provided in the middle of the bus bar introduction port; one end of the positive electrode box body and the negative electrode box body is provided There is a cable line for accommodating the fastening channel, and the cable line is arranged in the corresponding box body through the pressing block; one end of the cable line is located in the corresponding box body, and the other end extends out of the corresponding box body;

The miniature power management module is disposed in the box body and includes a frame and a diode chip. A first electrode terminal is provided on a left portion of the frame, and a second electrode terminal is provided on a right portion; between the first electrode terminal and the second electrode terminal. A diode chip is provided, and the diode chip is packaged on the frame through a plastic package; the frame is provided with a first busbar lead-out hole and a second busbelt lead-out hole, wherein the first busbelt lead-out hole is provided at the first electrode Between the terminal and the molded body, the second bus-belt lead-out hole is disposed between the second electrode terminal and the molded body;

The busbar inlet covers the first busbar outlet and the second busbar outlet.
The ultra-narrow photovoltaic junction box with a micro power management module according to claim 1, characterized in that: the guide boss and the two ends of the bus strip inlet respectively form a first introduction channel and a second introduction channel, The first introduction channel and the second introduction channel are provided along the introduction direction with a first installation hole and a second installation hole through which the busbar passes.
The ultra-narrow photovoltaic junction box with a miniature power management module according to claim 1, wherein the cross section of the guide boss is inverted triangle, and the sides of the two triangles of the inverted triangle are used as guides The first guide slope and the second guide slope of the boss; the first introduction channel is formed by the first guide slope and the end of the bus inlet; the second introduction channel is formed by the second guide slope and the bus inlet The end portion is formed and is the same as the first introduction channel structure and symmetrically arranged.
The ultra-narrow photovoltaic junction box with a micro power management module according to claim 2, wherein the aperture of the first mounting hole is larger than the aperture of the second mounting hole.
The ultra-narrow photovoltaic junction box with a micro power management module according to claim 1, wherein the right end of the cable of the positive box body is connected to the first electrode terminal on the corresponding micro power management module The left end of the cable of the negative box is connected to the second electrode terminal on the corresponding micro power management module, and the cable extends to the right of the negative box in vitro.
The ultra-narrow photovoltaic junction box with a miniature power management module according to claim 1, wherein the diode chip has a P junction and an N junction, and the N junction of the diode chip is electrically connected to the second electrode terminal The P junction of the diode chip is electrically connected to the first electrode terminal through a jumper.
The ultra-narrow photovoltaic junction box with a micro power management module according to claim 1, characterized in that: one side of the first electrode terminal is provided with a connection card slot, and the other side is stepped; The structure of the second electrode terminal is the same as that of the first electrode terminal, and is arranged symmetrically to the first electrode terminal.
The ultra-narrow photovoltaic junction box with a micro power management module according to claim 7, characterized in that: the inside of the box body is provided with a buckle corresponding to a card slot for fixing the micro power management module, and the micro The power management module is connected to the buckle through a card slot to form a connection between the micro power management module and the ultra-narrow photovoltaic junction box body.
The ultra-narrow photovoltaic junction box with a miniature power management module according to claim 1, wherein the plastic package has a hexagonal structure, and the first electrode terminal and the second electrode terminal are embedded by The method is embedded in the plastic package body and divides the plastic package body into an upper plastic sealing section with a trapezoidal cross section and a lower plastic sealing section with an inverted trapezoidal cross section; wherein the cross section of the lower plastic sealing section is an inverted trapezoid and the slope where the waist is located is an auxiliary guide slope .
The ultra-narrow photovoltaic junction box with a micro power management module according to any one of claims 1 to 9, further comprising a solar busbar, wherein the solar busbar is connected to adjacent solar cells The adjacent solar bus strips are introduced from the bus strip inlet after being led out, and are respectively connected to the first electrode terminal / second electrode terminal through the first bus strip lead-out hole / the second bus strip lead-out hole.