CN212901392U

CN212901392U - Waterproof solar cell panel junction box structure

Info

Publication number: CN212901392U
Application number: CN202022010814.7U
Authority: CN
Inventors: 林介本; 黄学铃; 范海伟
Original assignee: Fujian Quanzhou Sigoled Lighting Techn Co ltd
Current assignee: Fujian Quanzhou Sigoled Lighting Techn Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-04-06
Anticipated expiration: 2030-09-15

Abstract

The utility model discloses a junction box structure of a waterproof solar cell panel, which comprises a junction box body, a positive terminal, a negative terminal and a cable; the positive and negative wiring terminals are locked in the wiring box body, the cable line is provided with a positive wire and a negative wire, the positive wire and the negative wire are respectively and electrically connected with a positive circular wiring lug and a negative circular wiring lug, and the positive circular wiring lug and the negative circular wiring lug are respectively locked on the positive wiring terminal and the negative wiring terminal; the positive and negative electrodes are provided with waterproof plugs, and the junction box body is provided with threading holes for the waterproof plugs to be matched and hermetically mounted. The present case has circular lug owing to adopted the positive and negative electric wire of cable conductor to have, can pass through screw and gasket lock solid on positive negative terminal, and wiring, installation are very convenient, and more importantly its contact surface is big, is fit for the heavy current to pass through, satisfies current solar energy LED street lamp systems such as 3.2V and uses. The cable is provided with a waterproof plug and forms a tight sealing assembly structure with the junction box body, so that the waterproof purpose can be effectively achieved.

Description

Waterproof solar cell panel junction box structure

Technical Field

The utility model relates to a solar cell panel field specifically indicates a waterproof solar cell panel terminal box structure.

Background

With the development of solar cell technology, lithium battery technology, high light efficiency white light LED technology and intelligent control technology, solar LED street lamps based on ternary lithium and lithium iron phosphate storage batteries become the mainstream of the current market. Because the battery cores of the lithium batteries have the difference of monomer internal resistance and capacity, even though the battery cores are subjected to capacity grading screening, the adoption of a structure with multiple serially connected batteries is avoided as much as possible, so that the schemes of 1-3 series of storage batteries such as 3.2V, 3.7V, 6.4V, 7.4V and the like become hot researches of the industry, and particularly, the solar LED street lamp taking the 3.2V lithium iron phosphate battery as the storage battery becomes a key project for research and development of a plurality of enterprises.

However, in addition to the 3.2V lithium iron phosphate battery pack, the 3.2V solar LED street lamp is generally formed by a 4-6V solar panel (module), a 2.8-3.2V LED light source module and an intelligent controller based on the 3.2V system design. The low-voltage solar panel has a problem of large charging current, for example, when the voltage of the 90-watt solar panel is designed to be about 6V, the charging current of the solar panel can reach 15A, which puts higher requirements on the quality of the fiber core of the electric wire and the connection mode. Through market and technical research, the applicant finds that a plurality of people still adopt a mode that wires are wound in a junction box of a solar cell panel and then are pressed by a screw cap, and a contact point formed in the mode obviously cannot meet the requirement of passing large current. In addition, the problem of poor waterproof wire of the existing solar wiring part exists, the use is influenced, and potential safety hazards exist.

In view of the above, the present disclosure provides a waterproof solar cell panel junction box structure, which is made by further studying the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waterproof solar cell panel terminal box structure, its terminal box structural design is reasonable, both can realize that convenient wiring satisfies the requirement that the heavy current charges, possesses excellent waterproof design again, but wide application in current low-voltage heavy current's solar cell panel.

In order to achieve the above purpose, the solution of the present invention is:

a junction box structure of a waterproof solar cell panel comprises a junction box body, a positive terminal, a negative terminal and a cable; the positive and negative wiring terminals are locked in the wiring box body, the cable line is provided with a positive wire and a negative wire, the positive wire and the negative wire are respectively and electrically connected with a positive circular wiring lug and a negative circular wiring lug, and the positive circular wiring lug and the negative circular wiring lug are respectively locked on the positive wiring terminal and the negative wiring terminal; the positive and negative electrodes are provided with waterproof plugs, and the junction box body is provided with threading holes for the waterproof plugs to be matched and hermetically mounted.

The waterproof plug is provided with a sealing flange, and a clamping groove for matching, sealing and clamping the sealing flange is arranged in the threading hole.

The wiring box body is internally provided with two parallel wiring post seats, and the positive wiring post and the negative wiring post are respectively embedded on the two wiring post seats in a matching way and are respectively locked and fixed through screws.

And a bypass diode for preventing current from flowing reversely is adopted between the positive terminal and the negative terminal.

The positive and negative circular lugs are electrically connected with the positive and negative wires respectively in a pressing line and welding mode.

And the positive and negative terminals are respectively provided with a positioning seat for positioning the positive and negative wires.

The junction box body comprises a base and an upper cover which are mutually buckled and assembled.

The positive and negative wiring terminals are locked on the base, and the threading hole is divided into two parts to be formed on the base and the upper cover.

Be equipped with waterproof coil between base and upper cover, cover to sink and be equipped with the seat that supplies the base and follow the matching and inlay the recess of dress, waterproof coil corresponds places in the recess location.

After adopting above-mentioned scheme, this novel waterproof solar cell panel terminal box structure lies in for prior art's beneficial effect: the present case has circular lug owing to adopted the positive and negative electric wire of cable conductor to have, can pass through screw and gasket lock solid on positive negative terminal, and wiring, installation are very convenient, and more importantly its contact surface is big, is fit for the heavy current to pass through, satisfies current solar energy LED street lamp systems such as 3.2V and uses. The cable is provided with a waterproof plug and forms a tight sealing assembly structure with the junction box body, so that the waterproof purpose can be effectively achieved.

Drawings

FIG. 1 is a perspective view of the novel junction box structure;

FIG. 2 is an exploded view of the novel junction box structure;

FIG. 3 is a schematic view of the internal structure of the novel junction box structure;

fig. 4 is a schematic view of the novel upper cover.

Description of the reference symbols

A junction box body 1, a base 11, a junction post seat 111,

an upper cover 12, a groove 121, a threading hole 13, a clamping groove 131, a buckling group 14,

positive and negative terminals 2, bypass diode 23, lock hole 24, screw 241,

wiring holes 25, screws and washers 251, positioning seats 26,

a cable 3, positive and negative

electric wires

31, 32, positive and negative

circular lugs

33, 34,

waterproof plug 35, sealing flange 351.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

The utility model relates to a junction box structure of a waterproof solar cell panel, which comprises a junction box body 1, positive and negative terminal posts 2 (comprising a positive terminal post 21 and a negative terminal post 22) and a cable 3, as shown in figures 1-4. The positive and negative terminals 2 are locked in the junction box body 1, and the cable 3 extends into the junction box body 1 to be electrically connected with the positive and negative terminals 2. In order to facilitate the simple assembly of the positive and negative terminals 2 and the cables 3 in the junction box body 1, the junction box body 1 preferably includes a base 11 and an upper cover 12 which are fastened and assembled with each other, and the fastening and the disassembly are realized by a fastening group 14 between the base 11 and the upper cover.

The cable 3 has positive and

negative electrodes

31 and 32. The positive and negative

electric wires

31, 32 are electrically connected with positive and negative

circular lugs

33, 34, respectively, and preferably, the positive and negative

circular lugs

33, 34 are electrically connected with the positive and negative

electric wires

31, 32, respectively, by means of pressing and welding. The positive and negative

circular lugs

33, 34 are respectively locked on the positive and

negative terminals

21, 22 in a one-to-one correspondence. In the embodiment, the locking can be achieved by screws and gaskets 251, circular holes for screws to pass through are formed on the positive and negative

circular lugs

33 and 34, and wiring holes 25 are correspondingly formed on the positive and

negative wiring posts

21 and 22. During wiring, as shown in the figure, the circular holes of the positive and negative

circular lugs

33, 34 are aligned with the wiring holes 25 of the positive and

negative terminals

21, 22, and are locked by screws and gaskets 251, i.e. completely electrically connected.

Therefore, the positive and

negative wires

32 and 32 of the cable 3 are provided with the circular lugs and can be simply and reliably locked on the positive and negative wiring terminals 2 through screws and gaskets, the wiring and the installation are very convenient, and particularly, the contact surface is large, so that the cable is suitable for large current to pass through and meets the requirements of the current 3.2V solar LED street lamp systems. Preferably, a bypass diode 23 is disposed between the positive and

negative terminals

21 and 22 to prevent a reverse current, thereby enhancing the safety and reliability of the junction box.

The positive and

negative wires

31 and 32 are provided with waterproof plugs 35, and the junction box body 1 is provided with a threading hole 13 for the waterproof plugs 35 to be matched and hermetically installed. The cable 3 is provided with a waterproof plug 35, and forms a tight sealing assembly structure with the junction box body 1, so that the waterproof purpose can be effectively achieved. When the junction box body 1 adopts a mutual buckling mode of the base 11 and the upper cover 12, the positive and negative terminal posts 2 are preferably locked on the base 11, and the threading hole 13 can be correspondingly formed on the base 11 and the upper cover 12 in two parts.

Preferably, the waterproof plug 35 has a sealing flange 351, and a slot 131 for the sealing flange 351 to be matched, sealed and clamped is provided in the threading hole 13. So design not only plays the waterproof sealing effect of strengthening terminal box body 1's through wires hole 13, and the mutual card through sealing flange 351 and draw-in groove 131 is put spacingly moreover, during the messenger installation, before the circular port of positive, negative

circular lug

33, 34 and positive,

negative terminal

21, 22 lock solid each other, can play the prepositioning effect to cable conductor 3 to make subsequent lock solid operation simple more, convenient.

Furthermore, in order to avoid the mutual deviation between the circular holes of the positive and negative

circular lugs

33, 34 and the wiring holes 25 of the positive and

negative terminals

21, 22 during installation, which is not beneficial to alignment locking, it is preferable that positioning seats 26 are further respectively provided on the positive and

negative terminals

21, 22, and the flexible positive and

negative wires

31, 32 are respectively positioned by the positioning seats 26, so that the automatic alignment between the circular holes of the positive and negative

circular lugs

33, 34 and the wiring holes 25 of the positive and

negative terminals

21, 22 can be ensured after positioning.

Preferably, in order to facilitate the easy installation of the positive and

negative terminals

21, 22 in the terminal box body 1 (i.e. on the base 11), two terminal bases 111 are arranged side by side in the terminal box body 1 (i.e. on the base 11), and the positive and

negative terminals

21, 22 are respectively fitted on the two terminal bases 111 and locked by screws 241. The positive and

negative terminals

21, 22 are also provided with a lock hole 24 for locking the screw 241.

Preferably, a waterproof coil (not shown) is further disposed between the base 11 and the upper cover 12 to improve the waterproof performance of the whole junction box. In a specific embodiment, the upper cover 12 is provided with a groove 121 for the seat edge of the base 11 to be embedded in a matching manner, and the waterproof coil is correspondingly placed in the groove 121 for positioning.

The foregoing is only a preferred embodiment of the present invention and all equivalent changes and modifications made within the scope of the present invention are intended to be covered by the appended claims.

Claims

1. A junction box structure of a waterproof solar cell panel is characterized by comprising a junction box body, a positive terminal, a negative terminal and a cable; the positive and negative wiring terminals are locked in the wiring box body, the cable line is provided with a positive wire and a negative wire, the positive wire and the negative wire are respectively and electrically connected with a positive circular wiring lug and a negative circular wiring lug, and the positive circular wiring lug and the negative circular wiring lug are respectively locked on the positive wiring terminal and the negative wiring terminal; the positive and negative electrodes are provided with waterproof plugs, and the junction box body is provided with threading holes for the waterproof plugs to be matched and hermetically mounted.

2. The junction box structure of the waterproof solar cell panel as claimed in claim 1, wherein the waterproof plug is provided with a sealing flange, and a slot for the sealing flange to be matched, sealed and clamped is arranged in the threading hole.

3. The junction box structure of the waterproof solar cell panel as claimed in claim 1, wherein two parallel terminal bases are arranged in the junction box body, and the positive and negative terminals are respectively embedded on the two terminal bases in a matching manner and are respectively locked and fixed through screws.

4. The junction box structure of claim 1, wherein a bypass diode is disposed between the positive and negative terminals for preventing a reverse current.

5. The junction box structure of claim 1, wherein the positive and negative circular connecting tabs are electrically connected to the positive and negative wires respectively by pressing and welding.

6. The junction box structure of a waterproof solar cell panel as claimed in claim 1, wherein the positive and negative terminals are respectively provided with a positioning seat for positioning the positive and negative wires.

7. The junction box structure of claim 1, wherein the junction box body comprises a base and an upper cover that are snap-fit to each other.

8. The junction box structure of the waterproof solar cell panel as claimed in claim 7, wherein the positive and negative terminals are locked on the base, and the threading hole is formed on the base and the upper cover in two parts.

9. The junction box structure of the waterproof solar cell panel as claimed in claim 7, wherein a waterproof coil is disposed between the base and the upper cover, a groove for the seat edge of the base to be embedded in is sunken in the upper cover, and the waterproof coil is correspondingly disposed in the groove for positioning.