CN202633355U

CN202633355U - Negative pressure energy storage photovoltaic junction box

Info

Publication number: CN202633355U
Application number: CN2012202824591U
Authority: CN
Inventors: 边晓晖; 张启明; 边佶
Original assignee: JIANGSU PAI TE HIGH-TECH Co Ltd
Current assignee: JIANGSU PAI TE HIGH-TECH Co Ltd
Priority date: 2012-06-15
Filing date: 2012-06-15
Publication date: 2012-12-26
Anticipated expiration: 2022-06-15

Abstract

The utility model relates to a negative pressure energy storage photovoltaic junction box, belonging to the field of solar energy photovoltaic application. The negative pressure energy storage photovoltaic junction box comprises a box body for arranging a negative pressure energy storage and follow current circuit model and a box cover buckled with the box body, wherein the output end of the negative pressure energy storage and follow current circuit model is electrically connected with a cable core of a photovoltaic cable, the input end of the negative pressure energy storage and follow current circuit model comprises a collector piece extending towards the direction of the box cover, an elastic clamping piece with an opening gap is fixed on the location of the inner surface of the box cover, which corresponds to the collector piece, and the opening gap is matched with the thickness of the collector piece. During wiring, a collector belt penetrates in the box body, and bypasses through the end head and inflects to the other surface of the collector piece along one surface of the collector sheet, in a process of buckling the box cover, the collector piece wound with the collector belt is inserted into the opening gap of a spring clamping piece, therefore, by means of an elastic clamping function, the collector belt is clung to two surfaces of the collector piece in a reliable contact manner.

Description

A kind of negative pressure accumulation of energy photovoltaic junction box

Technical field

The utility model relates to a kind of negative pressure accumulation of energy photovoltaic junction box, and especially a kind of negative pressure energy storage afterflow control metal-oxide-semiconductor bypass apparatus terminal box belongs to the photovoltaic application.

Background technology

Photovoltaic generating system junction box structure of the prior art and assembling process are: the injecting formed plastic box body; The triangle jump ring is assembled on the metallic support, stamp-mounting-paper diode is welded on the metallic support step surface, with correct being assembled in the box body of the metallic support that assembles; Cable is welded in the metallic support stern notch; Plug in the dress, the rope head is tightened the waterproof nut.When the band that confluxes that will be derived from electrooptical device is introduced terminal box, need strut the spring clip gripping member by instrument, the band that will conflux penetrates, and relends to help resetting of spring clip gripping member to realize being electrically connected.This mode of connection makes that not only junction box structure is complicated, the wiring complex operation; Need two people cooperate assembling on the production line, and reliability also have problems, because the diode internal resistance is big, hot spot appears in the high photovoltaic generating system that causes of power consumption; Electricity generation efficiency descends, and assembly cost is higher.

The utility model content

The purpose of the utility model is: to the shortcoming that above-mentioned prior art exists, propose a kind of easy to operate, reliable negative pressure accumulation of energy photovoltaic junction box of connection.

In order to achieve the above object; The negative pressure accumulation of energy photovoltaic junction box of the utility model has the box body of settling negative pressure accumulation of energy freewheeling circuit module and the lid that fastens with box body; The output of said negative pressure accumulation of energy freewheeling circuit module is electrically connected with the cable core of photovoltaic cable; The input of said negative pressure accumulation of energy freewheeling circuit module has the sheet that confluxes that extends towards the lid direction; The conflux fixed-site of sheet of said lid inner surface correspondence has the elastic clip of opened gap, and the thickness of said opened gap and the said sheet that confluxes matches.

It is that the termination of the said sheet that confluxes has the caulking groove that matches with the bandwidth of confluxing that the utility model further improves.

During wiring; After the band that will conflux penetrates box body,, the one side of the sheet that confluxes is folded back to another side after walking around its termination, in fastening the lid process; The sheet that confluxes that is wound with the band that confluxes will insert in the opened gap of spring clip; Thereby by the resilient clamp effect, make the band that confluxes be close to the two sides of the sheet that confluxes, guarantee the reliable contact of fitting.The caulking groove of sheet of the confluxing band that can guarantee to conflux is in the sheet middle part of confluxing, and more helps making its electrically contacting each other safe reliable.

Description of drawings

Fig. 1 opens the lid structural representation for an embodiment's of the utility model.

Fig. 2 is the cross-sectional side enlarged drawing of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is the negative pressure accumulation of energy freewheeling circuit module perspective view among Fig. 1 embodiment.

Fig. 5 is the lid structural representation among Fig. 1 embodiment.

Fig. 6 is the negative pressure accumulation of energy freewheeling circuit modular circuit schematic diagram of Fig. 1 embodiment.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

The negative pressure accumulation of energy photovoltaic junction box of present embodiment such as Fig. 1 have the box body 2 of settling negative pressure accumulation of energy freewheeling circuit module 1 and the lid 3 that fastens with box body 2 to shown in Figure 5.Each limit of the periphery of box body 2 has the snap ring 2-2 of band grab 2-1, and the position of the corresponding snap ring 2-2 in each limit of the periphery of lid 3 has the buckle 3-2 of band draw-in groove 3-1, and the end face of lid 3 has the circular groove 3-3 that fastens with box body 2.When lid 3 being covered in 2 last times of box body, corresponding buckle 3-2 inserts snap ring 2-2, and grab 2-1 blocks draw-in groove 3-1, and circular groove 3-3 fastens box body 2 peripheries, thus reliable airtight location.

The inside of box body 2 has the two relative grooved rails of the protruding 2-3 in band location respectively; The both sides of negative pressure accumulation of energy freewheeling circuit module 1 have the inserted sheet 1-1 that matches with grooved rail and with the protruding recessed 1-6 in corresponding location in location; During arrangement inserted sheet is inserted along grooved rail, protruding falling into located recessed getting final product until the location, and be very convenient.

The input of negative pressure accumulation of energy freewheeling circuit module 1 has the sheet 1-2 that confluxes that extends towards the lid direction everywhere; The conflux fixing elastic clip 6 of position setting-in of sheet 1-2 of lid 3 inner surface correspondences; This elastic clip 6 encompasses the T font with opened gap by elastic sheet metal and constitutes; Its opened gap is towards the sheet 1-2 that confluxes, and matches with the thickness of the sheet 1-2 that confluxes.The conflux termination of sheet 1-2 has the caulking groove 1-5 that matches with the bandwidth of confluxing.

The bottom of negative pressure accumulation of energy freewheeling circuit module 1 is the metal substrate 1-3 that adheres to printed circuit, and the bending back, lower end of the sheet 1-2 that confluxes is electrically connected with the current input terminal of printed circuit, and is encapsulated in the negative pressure accumulation of energy freewheeling circuit module 1.The output of negative pressure accumulation of energy freewheeling circuit module 1 is electrically connected with the cable core 4-1 of photovoltaic cable 4 through copper pin 1-4, and photovoltaic cable 4 is through lock nut 5 and box body 2 lockings.

The principle of negative pressure accumulation of energy freewheeling circuit module 1 printed circuit is as shown in Figure 5, and A connects the photovoltaic cell module positive pole, and B connects the photovoltaic cell module negative pole.When the cell panel generation negative pressure that breaks down, promptly A voltage is for negative, and B voltage is correct time, the B malleation through diode to electric capacity charging and storing rapidly.After capacitance voltage rises to the high valve voltage of voltage identification, open the control utmost point of metal-oxide-semiconductor, the MOS conducting is made AB two terminal shortcircuits, reach the purpose of protection cell panel.As be short-circuited, built-in capacitance will slowly be discharged.When treating that capacitance voltage discharge is lower than the low valve value of voltage identification, with the control utmost point of closing MOS, the MOS open circuit.If at this moment the AB voltage recovers normal, bypass circuit will quit work.If the fault of still having will repeat above-mentioned work,, the system of assurance normal power supply do not burn cell panel thereby hot spot not occurring with the protection cell panel.(C, D can analogize)

During wiring; To conflux be with 7 to penetrate box body 2 after, be folded back to another side walk around the caulking groove of its termination along the one side of sheet 1-2 of confluxing after, fasten lid 3 again; The sheet that confluxes that is wound with the band that confluxes is inserted in the opened gap of spring clip 6; Thereby by the resilient clamp effect, make the two sides of confluxing and being close to the sheet 1-2 that confluxes, guarantee the reliable contact of fitting with 7.

Facts have proved that compare with conventional electrical connectors, present embodiment has following remarkable advantage:

1) low internal resistance (be merely its 50%), low-power consumption have been realized.

2) the favourable prolongation photocell life-span, stable electric generation usefulness helps the operation of photovoltaic plant system safety.

3) simple and ingenious structure, easy to assembly, significantly improve work efficiency.

Except that the foregoing description, the utility model can also be used other equivalent transformation modes, as adopting the analogous circuit module, and structure such as similarly forced, Embedded positive and negative electrode getting type, all drops on the protection range of the utility model.

Claims

1. negative pressure accumulation of energy photovoltaic junction box; Have the box body of settling negative pressure accumulation of energy freewheeling circuit module and the lid that fastens with box body; The output of said negative pressure accumulation of energy freewheeling circuit module is electrically connected with the cable core of photovoltaic cable; It is characterized in that: the input of said negative pressure accumulation of energy freewheeling circuit module has the sheet that confluxes that extends towards the lid direction, and the conflux fixed-site of sheet of said lid inner surface correspondence has the elastic clip of opened gap, and the thickness of said opened gap and the said sheet that confluxes matches.

2. negative pressure accumulation of energy photovoltaic junction box according to claim 1 is characterized in that: the termination of the said sheet that confluxes has the caulking groove that matches with the bandwidth of confluxing.

3. negative pressure accumulation of energy photovoltaic junction box according to claim 1 and 2 is characterized in that: each limit of the periphery of said box body has the snap ring of band grab, and the position of the corresponding snap ring in each limit of the periphery of said lid has the buckle of band draw-in groove.

4. negative pressure accumulation of energy photovoltaic junction box according to claim 3 is characterized in that: the end face of said lid has the circular groove that fastens with box body.

5. negative pressure accumulation of energy photovoltaic junction box according to claim 1 and 2; It is characterized in that: the inside of said box body has respectively two protruding relative grooved rails of band location, and the both sides of said negative pressure accumulation of energy freewheeling circuit module have the inserted sheet that matches with grooved rail and with to locate protruding corresponding location recessed.

6. negative pressure accumulation of energy photovoltaic junction box according to claim 5; It is characterized in that: the conflux fixing elastic clip of position setting-in of sheet of said lid inner surface correspondence; Said elastic clip encompasses the T font with opened gap by elastic sheet metal and constitutes, and said opened gap is towards the sheet that confluxes.

7. negative pressure accumulation of energy photovoltaic junction box according to claim 6; It is characterized in that: the bottom of said negative pressure accumulation of energy freewheeling circuit module is the metal substrate that adheres to printed circuit; The bending back, lower end of the said sheet that confluxes is electrically connected with the current input terminal of printed circuit, and is encapsulated in the negative pressure accumulation of energy freewheeling circuit module.

8. negative pressure accumulation of energy photovoltaic junction box according to claim 7 is characterized in that: the output of said negative pressure accumulation of energy freewheeling circuit module is electrically connected with the cable core of photovoltaic cable through the copper pin, and said photovoltaic cable is through lock nut and box body locking.