Utility model content
This utility model is solved the technical problem that to be to provide a kind of photovoltaic generating system and photovoltaic junction box, and it can solve
The most traditional photovoltaic generating system problem that generating efficiency is relatively low under the low light level.
For solving above-mentioned technical problem, this utility model provides a kind of photovoltaic generating system, including some solar-electricity
Pond, photovoltaic junction box and connection solaode and the busbar of photovoltaic junction box, described busbar is provided with and extends into photovoltaic
Busbar leading-in end in rosette, described photovoltaic junction box includes: housing, including box body and lid, between box body and lid
Form host cavity;Conducting strip, is arranged in described host cavity, and is electrically connected with busbar;Bypass diode, is arranged at described
In host cavity, and it is electrically connected with two adjacent conducting strips;Transmission cable, is electrically connected with described busbar;Photoconductive resistance,
It is electrically connected between described busbar leading-in end and described transmission cable.
Further, the two ends of described photoconductive resistance are welded with described busbar leading-in end and described transmission cable respectively
Connecing in succession, described lid is provided with the transparent region corresponding with described photoconductive resistance.
Further, described busbar leading-in end is positive pole leading-in end or negative pole leading-in end, and it passes through conducting strip and institute
State transmission cable to connect, and the two ends of described photoconductive resistance are electrically connected with the two ends of this conducting strip respectively.
Further, being provided with sealing device between described transmission cable and described box body, described sealing device includes close
Seal nut, be partially housed in pawl and sealed tube in the sealing in sealing nut.
Further, in described sealing, pawl includes the claw type portion of at least two expandable, described sealing sleeve pipe and
In sealing, pawl is all around described transmission cable, and closely cooperates with transmission cable.
Further, described conducting strip is provided with the installation region for welding described bypass diode of projection.
Further, described conducting strip includes main part and connecting portion that is vertical with main part and that be connected, connecting portion
Being connected with described busbar by terminal, described main part is provided with the installing zone for welding described bypass diode of projection
Territory;One end of described photoconductive resistance is connected to described terminal.
Further, multiple alignment pin for described conducting strip is positioned, described conduction it are provided with in described box body
Sheet is provided with hole, multiple location, and alignment pin is positioned at hole, location;Being provided with groove in described box body, groove is positioned at described conducting strip
Lower section.
This utility model additionally provides a kind of photovoltaic junction box, including box body and lid, is formed and receive between box body and lid
Cavity volume, is provided with the leading-in end for connecting solaode and outwards transmits the transmission cable of electric current in described host cavity, described
The photoconductive resistance being electrically connected between described leading-in end and described transmission cable it is additionally provided with in host cavity.
Further, described leading-in end is terminal;Described terminal is fixing with described box body to be connected.
Compared with prior art, use photovoltaic generating system described in the utility model, in busbar leading-in end and transmission
Tandem photosensitive resistance between cable, under low light condition, can improve the low light level effect of solaode, i.e. solaode exists
Remain to convert light into into electric energy under faint light intensity.When irradiance level is relatively low, the generating of solaode can be improved
Efficiency.It is particularly suited for the countries and regions that irradiance level is relatively low.
Accompanying drawing explanation
Fig. 1 is under conditions of the low light level, during different irradiance, improves the conversion efficiency of solaode corresponding during Rs
Figure;
Fig. 2 is the schematic diagram of photovoltaic generating system described in the utility model;
Fig. 3 is the schematic diagram of photovoltaic junction box described in the utility model;
Fig. 4 is the schematic diagram of the upper cover removal state of photovoltaic junction box described in the utility model;
Fig. 5 is the schematic diagram of the box body of photovoltaic junction box described in the utility model;
Fig. 6 is the schematic diagram of the conducting strip of photovoltaic junction box described in the utility model;
Figure is labeled as: photovoltaic junction box 100, housing 10, box body 11, base 111, sidewall 112, lid 12, connection jaws
13, draw-in groove 14, alignment pin 15, groove 16, conducting strip 20, main part 21, connecting portion 22, terminal 23, position hole 24, bypass two poles
Pipe 30, transmission cable 40, sealing device 41, sealing nut 411, pawl 412 in sealing, photoconductive resistance 50, busbar 60, solar energy
Battery 70.
Detailed description of the invention
Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings, wherein
The most same or similar label represents same or similar element or has the element of same or like function.Lead to below
It is exemplary for crossing the embodiment being described with reference to the drawings, it is intended to be used for explaining this utility model, and it is not intended that to this practicality
Novel restriction.
As shown in Figures 1 to 6, a kind of photovoltaic generating system, including some solaodes 70, photovoltaic junction box 100 and
Connecting solaode 70 and the busbar 60 of photovoltaic junction box 100, described busbar 60 is provided with and extends in rosette
Busbar leading-in end.Described photovoltaic junction box 100 includes: housing 10, and housing 10 includes box body 11 and lid 12, box body 11 and box
Host cavity is formed between lid 12.Described busbar 60 is provided with the positive pole leading-in end extended in described host cavity and negative pole introduces
End;Some conducting strips 20, are arranged in described host cavity, are electrically connected with busbar 60;Bypass diode 30, is arranged at described
In host cavity, and it is electrically connected with adjacent two conducting strip;Transmission cable 40, including two, respectively with described busbar 60
Positive pole leading-in end and negative pole leading-in end are electrically connected with;Photoconductive resistance 50, is series at the positive pole/negative pole leading-in end of described busbar 60
And between described transmission cable 40.Box body 11 includes base 111 and is arranged at the peripheral sidewall 112 of base 111, base
Forming hollow region between 111 and sidewall 112, hollow region forms host cavity after being sealed by lid 12, facilitates follow-up to photovoltaic
Encapsulating is carried out in rosette 100.Some conducting strips 20 and bypass diode 30 are arranged in described host cavity.Certainly, at this
In utility model preferred embodiment, the lid 12 of described photovoltaic junction box is provided with transparent in the position corresponding with photoconductive resistance 50
Region, to facilitate the power of photoconductive resistance 50 perception ambient.
Series cells in solaode by illumination produce formed objects photogenerated current, if but cell piece hidden
Covering or occur in that shade, not only these cell pieces can not produce electric current, other have illumination too to be taken as load consumption on the contrary
Energy produced by positive electricity pond, shielded solar module now can generate heat, here it is hot spot effect.This effect can be tight
The destruction cell piece of weight, in extreme circumstances, cell piece may reverse-biased puncture.Bypass two poles are set in photovoltaic junction box 100
Pipe 30, is possible to prevent solar module to wreck due to hot spot effect, it is to avoid energy quilt produced by photogalvanic cell sheet
The cell piece being masked is consumed, and bypass diode can be one or more, and bypass diode can be Schottky two pole
Pipe, it is also possible to be metal-oxide layer-quasiconductor-field-effect transistor (Metal-Oxide-Semiconductor Field-
Effect Transistor, MOSFET), or the diode of other form.Positive pole leading-in end and described transmission at busbar 60
Tandem photosensitive resistance 50 between cable 40, or connect between described transmission cable 40 at the negative pole leading-in end of busbar 60
Photoconductive resistance 50, under low light condition, can improve the low light level effect of solaode, and i.e. solaode is in faint light intensity
Remain to convert light into into electric energy under degree.When irradiance level is relatively low, the generating efficiency of solaode can be improved.Photosensitive electricity
Resistance 50 is under conditions of less than certain light intensity, and resistance value increases rapidly, thus increases the series resistance of assembly.The light of the present embodiment
Quick resistance effect is under low light condition, by increase whole solaode cell piece series resistance, improve too
Sun energy battery generating efficiency under low light level effect, by appropriate type selecting, intensity of illumination is big when, this photoconductive resistance
Resistance is almost negligible, it is to avoid because resistance itself generates heat the hidden danger of quality brought.Concrete, refer to accompanying drawing 1, spoke
When illumination is 200W/, when the resistance value of series resistance is 0.281 Ω, generating efficiency is 95%;Resistance when series resistance
When value is 0.35 Ω, generating efficiency is 97.5%;When the resistance value of series resistance is 0.413 Ω, generating efficiency is 99.8%.
When irradiance is 600W/, when the resistance value of series resistance is 0.281 Ω, generating efficiency is 99.4%;When series resistance
When resistance value is 0.35 Ω, generating efficiency is 100.5%;When the resistance value of series resistance is 0.413 Ω, generating efficiency is
101.5%.Different photoconductive resistance can be selected according to the irradiance of different regions, thus improves the generating of solaode
Efficiency.
The two ends of described photoconductive resistance 50 are welded to connect with described busbar leading-in end and described output cable 40 respectively;
Photoconductive resistance 50 and busbar leading-in end and output cable 40 are respectively welded connection, and it is firm to connect, will not occur to separate or
Person's loose contact, and service life is longer.
Described housing 10 offers the connection jaws 13 passed through for transmission cable 40, described connection jaws 13 and described transmission cable
Sealing device 41 it is provided with between 40;Connection jaws 13 can be provided on box body 11 or lid 12, new as this practicality
The preferred embodiment of type, connection jaws 13 is arranged on the sidewall 112 of box body 11, and two connection jaws may be located at same sidewall
On 112;Arranging connection jaws 13 on sidewall 112 to pass through for transmission cable 40, transmission cable 40 is parallel with housing 10, and two connect
Line mouth may be located on same sidewall 112 so that photovoltaic junction box 100 simple in construction of the present utility model, takes up room relatively
Little.Certainly, two connection jaws 13 can also is that and are arranged on different sidewalls 112.After being sealed by sealing device 41 so that shell
Body 10 generally sealed construction, can effectively prevent dust, steam etc. from entering photovoltaic junction box 100 by transmission cable 40
Internal and its interior electronic devices and components are impacted, affect using effect and the life-span of electronic devices and components.Sealing device 41
Can be to note fluid sealant or seal nipple or sealing ring etc. is set.
Described sealing device 41 includes the sealing nut 411 coordinated with described connection jaws 13, is partially housed in sealing nut
Sealing interior pawl 412 and being contained in the sealed tube in described connection jaws 13 in 411;In described sealing, pawl 412 includes at least
The claw type portion of two expandables, in the present embodiment, claw type portion is four, and in described sealed tube and sealing, pawl 412 is equal
Around described transmission cable 40, and closely cooperate with transmission cable 40.Sealing nut 411 include one can with seal in pawl 412
The conical nose coordinated.When mounted, output cord 40 first passes through sealed tube, and sealed tube is housed in connection jaws 13,
Output cord 40 is extended partially passing through of connection jaws 13 and is sealed interior pawl 412 and sealing nut 411.When sealing nut 411 with connect
The external screw thread of line mouth 13 coordinate and during axially-movable, its conical nose radial compression seal in the claw type portion of pawl 412 so that claw type
Transmission cable 40 is closely firmly grasped in portion, plays the effect of fixing seal.It should be appreciated that in above-mentioned sealing device 41,
In sealing, the quantity in claw type portion of pawl 412 may be arranged as three, four, five or even more, sealing nut 411 and wiring
Can be connected by the connected mode of the multiple routines such as the screw thread worked in coordination, buckle between mouth 13.
Described conducting strip 20 is provided with the bypass diode for welding described bypass diode 30 of projection;Installation region
31 are provided with solder layer welds for confession bypass diode 30, and bypass diode 30 is for electrically connecting the conducting strip that two adjacent
Connect.In the present embodiment, the quantity of conducting strip 20 is 4, and the quantity of corresponding bypass diode 30 is 3, bypass diode 30
Including diode body and with diode theme be connected leg, leg is welded on the installation of described adjacent two conducting strips 20
On region 31.Certainly, the quantity of conducting strip 20 can also be 3, and the quantity of corresponding bypass diode 30 is 2;Or
The quantity of conducting strip 20 is 5, and the quantity of corresponding bypass diode 30 is 4;Or the quantity of conducting strip 20 is 6,
The quantity of corresponding bypass diode 30 is 5;Or the corresponding bypass diode of conducting strip of other quantity, do not do at this
Repeat.
Described conducting strip 20 includes main part 21 and the connecting portion 22 being connected with main part 21, and connecting portion 22 passes through terminal
23 are connected with described busbar 60;Above-mentioned installation region 31 is arranged on the main part 21 of conducting strip 20, and connecting portion 22 is with main
Body 21 is vertically arranged, and is provided with conducting strip installation portion in box body 11, and conducting strip installation portion includes the card for arranging terminal 23
Groove 14, the side of draw-in groove 14 is provided with opening, and the connecting portion 22 of conducting strip 20 is positioned at draw-in groove 14 by opening, and by being installed on
Terminal 23 in draw-in groove 14 is electrically connected with busbar 60.In one embodiment, described connecting portion 22 is perpendicular to described main body
Portion 21 is arranged, and the positive and negative electrode leading-in end of described busbar 60 is connected with described terminal 23 respectively, and described photoconductive resistance 50
One end is then directly connected with described terminal 23, so that between itself and the positive pole leading-in end of described busbar 60 or negative pole leading-in end
Set up electrical connection.
Being provided with multiple alignment pin 15 for positioning described conducting strip 20 in described box body 11, described conducting strip 20 sets
Being equipped with hole, multiple location 24, alignment pin 15 is positioned at hole 24, location;Location to conducting strip 20 for convenience, sets in box body 11
Putting alignment pin 15, and arrange the location hole 24 corresponding with alignment pin 15 on conducting strip 20, location is convenient and accurate, and behind location
Conducting strip 20 will not offset, and also will not separate or loose contact with terminal 23.
Being provided with groove 16 in described box body 11, groove 16 is positioned at the lower section of described conducting strip 20;The end at groove 16 place
It is additionally provided with opening on seat 111, facilitates and follow-up photovoltaic junction box 100 is watered so that photovoltaic junction box 100 is integrally forming
Formula structure.
This utility model additionally provides a kind of photovoltaic junction box 100, including box body 11 and lid 12, box body 11 and lid 12
Between formed host cavity, be provided with the leading-in end for connecting solaode 70 in described host cavity and outwards transmit the biography of electric current
Defeated cable 40, is additionally provided with the photoconductive resistance being electrically connected between described leading-in end and described transmission cable 40 in described host cavity
50.Tandem photosensitive resistance 50 between leading-in end and described transmission cable 40, under low light condition, can improve solaode
Low light level effect, i.e. solaode remains to convert light into into electric energy under faint light intensity.When irradiance level is relatively low,
The generating efficiency of solaode can be improved.
Described leading-in end is the terminal 23 for being connected with the busbar 60 of solaode 70, and described terminal 23 is with described
Box body 11 is fixing to be connected.Terminal 23 is fixed with box body 11 after being connected, and vibrations will not be occurred to come off or separate, good connecting effect,
Service life is long.
Photovoltaic generating system of the present utility model, photovoltaic junction box for by solaode produce be galvanically connected to bear
Carry or electrical network, tandem photosensitive resistance 50 between busbar leading-in end and described transmission cable 40, under low light condition, permissible
Improve the low light level effect of solaode, i.e. solaode remains to convert light into into electric energy under faint light intensity.Work as spoke
When illumination level is relatively low, the generating efficiency of solaode can be improved.Be particularly suited for the relatively low country of irradiance level and
Area.
The above, be only most preferred embodiment of the present utility model, not this utility model is made any in form
Restriction, any those of ordinary skill in the art, without departing under technical solutions of the utility model ambit, utilize above-mentioned
Technical solutions of the utility model are made many possible variations and modification by the method content disclosed, and belong to claim protection
Scope.