CN218387424U - Elastic piece contact type junction box and photovoltaic energy conversion structure - Google Patents
Elastic piece contact type junction box and photovoltaic energy conversion structure Download PDFInfo
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- CN218387424U CN218387424U CN202122150143.9U CN202122150143U CN218387424U CN 218387424 U CN218387424 U CN 218387424U CN 202122150143 U CN202122150143 U CN 202122150143U CN 218387424 U CN218387424 U CN 218387424U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a shell fragment contact type terminal box and photovoltaic energy conversion structure, wherein the shell fragment contact type terminal box comprises a terminal box body, the terminal box body comprises a box base, a box cover, a first cable, a second cable, a first electric conductor, a second electric conductor and an energy converter; a first electric conductor and a second electric conductor are arranged in the box base, the first electric conductor and the second electric conductor are connected through an energy converter, a first cable is fixedly connected with the first electric conductor, a second cable is fixedly connected with the second electric conductor, the second electric conductor is provided with a spring sheet electric conductor, and the spring sheet electric conductor extends out of an opening at the bottom end of the box base; the annular groove has been seted up to the bottom of box seat, and based on the aforesaid, through set up the annular groove on the box seat, make in the adhesive tape embedding annular groove, the joint strength of multiplicable terminal box and photovoltaic carrier on the one hand, on the other hand can improve the sealing performance of shell fragment electric conductor and the area junction that converges, makes contact impedance remain throughout minimumly, and then obtains stable connection structure.
Description
Technical Field
The utility model relates to a photovoltaic equipment technical field, concretely relates to shell fragment contact type terminal box and photovoltaic energy conversion structure.
Background
The solar photovoltaic cell is a device for directly converting solar radiation energy into electric energy, and the photovoltaic module is a product formed by connecting a plurality of photovoltaic cells in series and parallel and then packaging, and is a basic unit in a photovoltaic power generation system. The photovoltaic module junction box is a key device for introducing electric energy generated by a solar photovoltaic cell into a power supply system. The junction box has the advantages that the reliable connection of the circuit is guaranteed, the connection between the conductor inside the junction box and the photovoltaic module bus bar must be reliable and stable on one hand, the contact impedance is lowest, and the junction box body and the photovoltaic module back plate must be tightly bonded on the other hand, so that the electric leakage phenomenon does not occur in the power generation period of the photovoltaic module.
For the photovoltaic module with the photovoltaic module bus bar attached to the backlight surface of the photovoltaic cell, the bus bar penetrates through a contact hole formed in a photovoltaic module back plate and is welded to a conductive body inside a junction box, a bottom plate of the junction box is coated with adhesive glue to bond the junction box and the photovoltaic module back plate into a whole, and after welding is finished, a box cover is covered and sealed finally. For a photovoltaic module with a photovoltaic module bus bar attached to a lighting surface of a photovoltaic cell, such as a copper indium gallium selenide thin-film solar cell module, as the photovoltaic cell is deposited on a backboard glass conducting layer, how to install and fix a junction box and how to connect a conductor inside the junction box and the photovoltaic module bus bar, no mature device and method exist so far. The method depends on the binding force and the binding quality of the back plate glass and the bottom plate of the junction box, so that the risk of falling off of the junction box due to weakened binding force exists, bubbles remain between double-sided glue and the back plate glass due to poor binding, and the risk of water seepage and electric leakage occurs.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a shell fragment contact type terminal box and photovoltaic energy conversion structure to improve the joint strength of shell fragment contact type terminal box and photovoltaic carrier.
In order to achieve the above object, a first aspect of the present invention provides a spring contact type junction box, which includes a junction box body, wherein the junction box body includes a box base, a box cover, a first cable, a second cable, a first conductor, a second conductor and an energy converter; the top end and the bottom end of the box base are both of an open structure, a first installation structure and a second installation structure are fixedly arranged in the box base, the first installation structure is provided with a first electric conductor in a clamping manner, the second installation structure is provided with a second electric conductor in a clamping manner, the energy converter is arranged between the first electric conductor and the second electric conductor, one end of the energy converter is fixedly connected with the first electric conductor, and the other end of the energy converter is fixedly connected with the second electric conductor; a first cable hole and a second cable hole are formed in one side part of the box base at intervals, one end of a first cable extends into the box base from the first cable hole and is fixedly connected with a first electric conductor, one end of a second cable extends into the box base from the second cable hole and is fixedly connected with one end of a second electric conductor, the other end of the second electric conductor is fixedly provided with a spring piece electric conductor, and the spring piece electric conductor extends out of an opening at the bottom end of the box base; an annular groove is formed in the bottom end of the box base and used for filling bonding glue connected with a photovoltaic carrier; the box cover is clamped at the opening at the top end of the box base.
Based on the above, by forming the annular groove on the box base, the bonding glue is embedded into the annular groove, so that on one hand, the connection strength between the junction box and the photovoltaic carrier can be increased, on the other hand, the sealing performance of the joint of the elastic sheet conductor and the bus bar can be improved, the contact impedance is always kept to be the lowest, and a stable connection structure is obtained.
In the technical solution, the utility model discloses can also do following improvement:
preferably, the box base is provided with two second cable holes, each second cable hole is provided with a second cable in a penetrating mode, and the second electric conductors are provided with connectors corresponding to the second cables one to one.
Preferably, the side wall of the box base provided with the first cable hole and the second cable hole extends outwards to form a cable pressing buckle.
Preferably, the gap part in the space formed by the box cover, the cable pressing buckle and the box base is filled with pouring sealant.
Preferably, the first installation structure includes a first locking post and a first pressing plate, the first conductor is provided with a first locking hole matched with the first locking post, and the first pressing plate is pressed against one side of the first conductor far away from the first cable.
The utility model discloses the second aspect provides a photovoltaic energy conversion structure, including the photovoltaic carrier and above-mentioned arbitrary one shell fragment contact type terminal box.
In the above technical scheme, the utility model discloses can also do as follows the improvement:
the photovoltaic carrier comprises upper back plate glass, lower back plate glass and a bus bar clamped between the upper back plate glass and the lower back plate glass, a contact hole for exposing the bus bar is formed between the upper back plate glass, the end part of the elastic sheet conductor penetrating through the box base is fixedly connected with the bus bar in the contact hole, and the bottom plate of the box base is connected with the upper back plate glass through bonding glue.
Compared with the prior art, the beneficial effects of the utility model are that: through setting up annular groove and overflow groove, adopt the mode of adhesive, when installing the last backplate glass of photovoltaic carrier with the terminal box body on, adopt slot bullet knot formula structure, effectively ensure the shell fragment electric conductor and converge the installation distance between the area, elastic construction guarantee effectively cushion and converge the area at the in close contact with of adhesive before solidifying, the adhesive after the solidification has ensured the long-term leakproofness between terminal box body and the backplate glass to and the stability of contact between electric conductor and the area of converging.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below.
Fig. 1 is a schematic perspective view of a spring contact type junction box according to an embodiment of the present invention;
fig. 2 is a top view of a spring contact terminal box according to an embodiment of the present invention;
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;
fig. 4 is a bottom view of a spring contact terminal box according to an embodiment of the present invention;
in the drawings, there is shown in the drawings,
the junction box comprises a junction box body 1, a box base 11, a first locking column 111, a first pressing plate 112, a first locking column 113, a first pressing plate 114, an annular groove 115, an overflow groove 116, a box cover 12, a first cable 13, a second cable 14, a first conductor 15, a second conductor 16, an energy converter 17, an elastic sheet conductor 18 and a cable pressing buckle 19;
upper back plate glass 21, lower back plate glass 22, bus bar 23, contact hole 24, adhesive 25,
And pouring a sealant 30.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Example 1
Referring to fig. 1 to 4, the present embodiment discloses a spring contact type junction box, which includes a junction box body 1, wherein the junction box body 1 includes a box base 11, a box cover 12, a first cable 13, a second cable 14, a first conductor 15, a second conductor 16, and an energy converter 17;
as shown in fig. 1, the top end and the bottom end of the box base 11 are both open structures, a first installation structure and a second installation structure are fixedly arranged in the box base 11, the first installation structure is provided with a first electric conductor 15 in a clamping manner, the second installation structure is provided with a second electric conductor 16 in a clamping manner, the energy converter 17 is arranged between the first electric conductor 15 and the second electric conductor 16, one end of the energy converter 17 is fixedly connected with the first electric conductor 15, and the other end of the energy converter 17 is fixedly connected with the second electric conductor 16; a first cable hole and a second cable hole are formed in one side portion of the box base 11 at intervals, the diameters of the first cable hole and the second cable hole are consistent, one end of a first cable 13 extends into the box base 11 from the first cable hole and is fixedly connected with a first electric conductor 15, one end of a second cable 14 extends into the box base 11 from the second cable hole and is fixedly connected with one end of a second electric conductor 16, an elastic sheet electric conductor 18 is fixedly arranged at the other end of the second electric conductor 16, and the elastic sheet electric conductor 18 extends out of an opening at the bottom end of the box base 11; the bottom end of the box base 11 is provided with an annular groove 115, the annular groove 115 is used for filling the bonding glue 25 connected with the photovoltaic carrier, and the box cover 12 is clamped at the opening at the top end of the box base 11.
Based on the above, by forming the annular groove 115 on the box base 11, the adhesive 25 is embedded into the annular groove 115, on one hand, the connection strength between the junction box body 1 and the photovoltaic carrier can be increased, on the other hand, the sealing performance of the joint between the elastic sheet conductor 18 and the bus bar 23 can be improved, so that the contact impedance is always kept to be the lowest, and further, a stable connection structure is obtained.
As shown in fig. 1, the box base 11 has two second cable holes, each second cable hole is provided with a second cable 14, the second conductor 16 has a connector corresponding to the second cable 14, and the first cable hole and the second cable hole are arranged side by side.
In this embodiment, the bottom plate of the box base 11 is further provided with an overflow groove 116, one end of the overflow groove 116 is communicated with the annular groove 115, and the other end of the overflow groove 116 extends out of the bottom edge of the box base 11, when the junction box body 1 is extruded with the photovoltaic carrier, the adhesive 25 in the annular groove 115 overflows to the two sides of the annular groove 115, the redundant part flows out to the outside of the box base 11 through the overflow groove, and finally, the adhesive 25 bonding area between the box base 11 and the upper back plate glass 21 is larger than the area of the annular groove 115, so as to further increase the connection strength between the junction box body 1 and the photovoltaic carrier.
In this embodiment, the gap portion in the space formed by the box cover 12, the cable pressing buckle 19 and the box base 11 is filled with the potting adhesive 30, wherein the potting adhesive 30 forms a potting adhesive layer in the box base 11, the potting adhesive 30 forms an isolation adhesive layer in the gap portion in the first cable hole and the second cable hole, and the potting adhesive layer and the isolation adhesive layer can isolate water vapor from the first conductor 15, the second conductor 16 and the energy converter 17, thereby effectively ensuring the service life of the junction box.
In this embodiment, the first mounting structure includes a first locking post 111 and a first pressing plate 112, the first conductor 15 is provided with a first locking hole matching with the first locking post 111, and the first pressing plate 112 is pressed against a side of the first conductor 15 away from the first cable 13. The second installation structure comprises a second locking column 113 and a second pressing plate 114, the second conductor 16 is provided with a second locking hole matched with the second locking column 113, the second pressing plate 114 is pressed on one side, far away from the second cable 14, of the second conductor 16 and is matched with the first locking hole through the first locking column 111, the second locking column 113 is matched with the second locking hole and the pressing effect of the first pressing plate 112 and the second pressing plate 114, the installation distance between the first installation structure and the second installation structure and the bus bar hole can be effectively guaranteed, and the elastic sheet conductor 10 can effectively buffer and tightly contact the bus bar 23 before the adhesive 25 is cured.
Example two
With reference to fig. 1 to 4, the present embodiment discloses a photovoltaic energy conversion structure, which includes a photovoltaic carrier and the spring contact type junction box provided in embodiment 1.
In this embodiment, the photovoltaic carrier includes an upper back glass 21, a lower back glass 22, and a bus bar 23 sandwiched between the upper back glass 21 and the lower back glass 22, a contact hole 24 is formed between the upper back glass 21 for exposing the bus bar 23, the end of the elastic sheet conductor 18 penetrating through the box holder 11 is fixedly connected to the bus bar 23 in the contact hole 24, and the bottom plate of the box holder 11 is connected to the upper back glass 21 through an adhesive 25.
Based on the structure, the installation method of the spring contact type junction box comprises the following steps:
s10, punching adhesive 25 on the annular groove 115 through a glue punching machine, or punching adhesive 25 along the periphery of the contact hole 24 of the upper back plate glass 21, wherein the position of the adhesive 25 is matched with the annular groove 115 up and down, and the junction box body 1 is adhered to the upper back plate glass 21;
s20, pressing the end part of the elastic sheet type electric conductor extending out of the box seat 11 on a bus bar 2341 laid on the photovoltaic cell to be tightly contacted, and welding;
s30, pouring the pouring sealant 30 into the box base 11, directly pouring the pouring sealant 30 into the box base 11, buckling the box cover 12, and naturally curing the adhesive 25 on the annular groove 115.
Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are known technology.
Claims (9)
1. The utility model provides a shell fragment contact type terminal box, includes terminal box body (1), its characterized in that: the junction box body (1) comprises a box base (11), a box cover (12), a first cable (13), a second cable (14), a first conductor (15), a second conductor (16) and an energy converter (17);
the top end and the bottom end of the box base (11) are both of an open structure, a first installation structure and a second installation structure are fixedly arranged in the box base (11), the first installation structure is provided with a first electric conductor (15) in a clamping manner, the second installation structure is provided with a second electric conductor (16) in a clamping manner, the energy converter (17) is arranged between the first electric conductor (15) and the second electric conductor (16), one end of the energy converter (17) is fixedly connected with the first electric conductor (15), and the other end of the energy converter (17) is fixedly connected with the second electric conductor (16);
a first cable hole and a second cable hole are formed in one side portion of the box base (11) at intervals, one end of a first cable (13) extends into the box base (11) from the first cable hole and is fixedly connected with a first electric conductor (15), one end of a second cable (14) extends into the box base (11) from the second cable hole and is fixedly connected with one end of a second electric conductor (16), an elastic sheet electric conductor (18) is fixedly arranged at the other end of the second electric conductor (16), and the elastic sheet electric conductor (18) extends out of an opening at the bottom end of the box base (11);
an annular groove (115) is formed in the bottom end of the box base (11), and the annular groove (115) is used for filling bonding glue (25) connected with a photovoltaic carrier;
the box cover (12) is clamped at the opening at the top end of the box base (11).
2. A terminal block of the spring contact type according to claim 1, wherein the block (11) has two second cable holes, each second cable hole having a second cable (14) inserted therethrough, and the second conductors (16) have contacts corresponding to the second cables (14) one by one.
3. The spring contact type junction box according to claim 1, wherein an overflow groove (116) is further formed in a bottom plate of the box base (11), one end of the overflow groove (116) is communicated with the annular groove (115), and the other end of the overflow groove extends out of the edge of the bottom end of the box base (11).
4. A terminal box of the spring contact type as claimed in claim 1, wherein the side wall of the box base (11) having the first and second cable holes extends outwardly to form a cable clamp (19).
5. The terminal box of claim 4, wherein the space between the box cover (12), the cable holder (19) and the box base (11) is filled with a potting compound (30).
6. The terminal box of claim 1, wherein the first mounting structure comprises a first locking post (111) and a first pressing plate (112), the first conductor (15) is provided with a first locking hole matched with the first locking post (111), and the first pressing plate (112) is pressed against one side of the first conductor (15) far away from the first cable (13).
7. The terminal box of claim 1, wherein the second mounting structure includes a second locking post (113) and a second pressing plate (114), the second conductor (16) has a second locking hole matching with the second locking post (113), and the second pressing plate (114) presses against a side of the second conductor (16) away from the second cable (14).
8. A photovoltaic energy conversion structure comprising a photovoltaic support and the spring contact junction box of any one of claims 1 to 7.
9. The photovoltaic energy conversion structure according to claim 8, wherein the photovoltaic carrier comprises an upper back plate glass (21), a lower back plate glass (22) and a bus bar (23) clamped between the upper back plate glass (21) and the lower back plate glass (22), a contact hole (24) for exposing the bus bar (23) is formed between the upper back plate glass (21), the end of the elastic sheet conductor (18) penetrating through the box base (11) is fixedly connected with the bus bar (23) in the contact hole (24), and the bottom plate of the box base (11) is connected with the upper back plate glass (21) through an adhesive (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122150143.9U CN218387424U (en) | 2021-09-07 | 2021-09-07 | Elastic piece contact type junction box and photovoltaic energy conversion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122150143.9U CN218387424U (en) | 2021-09-07 | 2021-09-07 | Elastic piece contact type junction box and photovoltaic energy conversion structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218387424U true CN218387424U (en) | 2023-01-24 |
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ID=84950931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122150143.9U Active CN218387424U (en) | 2021-09-07 | 2021-09-07 | Elastic piece contact type junction box and photovoltaic energy conversion structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218387424U (en) |
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2021
- 2021-09-07 CN CN202122150143.9U patent/CN218387424U/en active Active
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