Utility model content
The purpose of this utility model is to provide a kind of string cutting apparatus, to obtain efficient two-sided photovoltaic module.
To realize that above-mentioned purpose of utility model, the technical solution that the utility model embodiment is taken are as follows:
A kind of string cutting apparatus is applied on photovoltaic cell string welder, and the string cutting apparatus includes at least one cutter,
The position that cuts of at least one cutter includes that first be spaced apart in battery strings transmission direction cuts position and second
Position is cut, if the end welding of battery strings head end enters string and cuts position, the string cutting apparatus control cutter is cut described first
Position executes and cuts movement, if the end welding of battery strings tail end enters string and cuts position, the string cutting apparatus control cutter is described
Second, which cuts position execution, cuts movement.
Cutting position described in as a further improvement of the utility model, further includes that third cuts position, is passed in battery strings
On defeated direction, described second, which cuts position, cuts position and the third is cut between position positioned at described first, needed for definition
The length that the end welding at the battery strings both ends of production extends beyond cell piece edge is respectively a and b, and described first cuts position
And described second cut distance between position, described second cut position and distance that the third is cut between position is equal to a
With the difference of b.
2≤a/b≤5 as a further improvement of the utility model,.
20mm < a < 30mm as a further improvement of the utility model, 6mm <b < 10mm.
The string cutting apparatus cuts position at each and respectively corresponds setting one as a further improvement of the utility model,
A cutter.
The cutter number that the string cutting apparatus includes as a further improvement of the utility model, which is less than, cuts positional number, institute
Stating string cutting apparatus includes the cutter that at least one can be moved horizontally in battery strings transmission direction, to cut position at least two
Between switch.
The beneficial effect of the utility model embodiment includes: that string cutting apparatus is two or more by being spaced apart
Cut position, produce head and the tail and reserve the different first kind battery strings and the second class battery strings of welding length, thus realize by
Terminal box is arranged to photovoltaic module and is placed with outside the region of cell piece, solves terminal box to the occlusion issue of back side illuminaton light,
Promote the efficiency of two-sided photovoltaic module.
Specific embodiment
The utility model is described in detail below with reference to embodiment shown in the drawings.But the embodiment is not
Limit the utility model, structure that those skilled in the art are made according to the embodiment, method or functionally
Transformation is all contained in the protection scope of the utility model.
The utility model provides a kind of string cutting apparatus applied on photovoltaic cell string welder, please refers to Fig. 1 extremely
Shown in Fig. 5, the photovoltaic cell string includes several parallel arrangeds and spaced battery strings 10, and each battery strings 10 are wrapped
N cell piece 11 is included, and adjacent two cell piece 11 is connected by welding 12.In the embodiment that the utility model is shown, often
It can also be in other embodiments the other quantities such as 12 that one battery strings 10, which have 10 cell pieces,.
The photovoltaic module 100 includes several parallel arrangeds and spaced first kind battery strings A(abbreviation A goes here and there) and the
Two class battery strings B(abbreviation B string), the first kind battery strings A and the second class battery strings B are arranged alternately.First kind battery strings A and
The positive and negative electrode direction of second class battery strings B is in being reversed, and phase each other between first kind battery strings A and the second class battery strings B
Mutually series connection.
In the present embodiment, the end welding of the first kind battery strings A positive terminal extends beyond 11 edge of cell piece
Length is a, and the length that the end welding of the first kind battery strings A negative pole end extends beyond 11 edge of cell piece is b, described the
The length that the end welding of two class battery strings B positive terminals extends beyond 11 edge of cell piece is b, and the second class battery strings B is negative
The length that extreme end welding extends beyond 11 edge of cell piece is a, the positive terminal of the first kind battery strings A and described the
The negative pole end of two class battery strings B is in the same end.
In the present invention, the terminal box is placed in photovoltaic module 100 and is placed with outside the region of cell piece 11, tool
For body, the back side of the photovoltaic module 100 includes along 10 orientation of battery strings extension and first area in long strip, institute
The first end that first area is located at the battery strings 10 is stated, the terminal box is adhered on the first area.
It please join Fig. 6 and as shown in connection with fig. 8, in first preferred embodiment of the utility model, grab cell piece 11 with institute
Spacing d is stated arrange and be respectively attached adjacent two cell piece 11 by welding 12, the string between adjacent cell string 10
Spacing L1 and L2.The end welding at 10 both ends of battery strings produced needed for definition extends beyond the length difference at 11 edge of cell piece
For a and b, wherein 2≤a/b≤5, and 20mm < a < 30mm, 6mm <b < 10mm, and L1=2a, L2=2b.
In the present embodiment, the string cutting apparatus includes at least one cutter 20, at least one cutter 20 is cut
Position includes that first be spaced apart on 10 transmission direction of battery strings (string conveying direction as shown in Figure 8) cuts position and
Two cut position, if the end welding of battery strings head end enters string and cuts position, the string cutting apparatus control cutter 20 is described first
It cuts position execution and cuts movement, if the end welding of battery strings tail end enters string and cuts position, the string cutting apparatus controls cutter 20
Position execution, which is cut, described second cuts movement.In the present embodiment, it described first, second cuts position and corresponds to adjacent two
The midpoint (as shown in Figure 6) of connection welding belt 123 is cut between battery strings 10.
Join shown in Fig. 8, by the string cutting apparatus with being illustrated for a cutter 20, the end weldings of battery strings into
Enter string and cut position, cutter 20, which is moved to first/second and cuts position, cuts end welding, busbar and cell piece to be welded
10 are connected with each other in series welding area.
In this way, string cutting apparatus is cut after position cuts the initial and end end of battery strings 10 described first, second, make
The battery strings 10 are obtained to have a first end and a second end in their extension direction, the first end is equipped with first end welding 121,
The second end is equipped with the second end welding 122, and the first end welding 121 extends beyond the length at 11 edge of cell piece
For the first preset length a, the length that the second end welding 122 extends beyond 11 edge of cell piece is the second preset length b.
The first end welding 121 with the first busbar for being connected with terminal box to interconnect.
It please join Fig. 7 and as shown in connection with fig. 8, in the second embodiment of the utility model, grab cell piece 11 between described
Arrange away from d and be respectively attached adjacent two cell piece 11 by welding 12, the string spacing between adjacent cell string is
L, wherein L=2a.
In the present embodiment, the position that cuts further includes that third cuts position, in the transmission direction of battery strings 10, institute
It states second and cuts position and cut position and the third is cut between position positioned at described first, described first cuts position and institute
State second cut distance between position, described second cut position and distance that the third cuts between position be equal to a and b it
Difference.
In this way, string cutting apparatus is cut after position cuts the initial and end end of battery strings 10 described first, second, make
The first end weldings 121 of the battery strings 10 to extend beyond the length at 11 edge of cell piece be the first preset length a, it is described
The length that the second end welding 122 extends beyond 11 edge of cell piece is the second preset length b.
In addition, the setting of cutter 20 of the utility model can be there are many embodiment, string cutting apparatus can only have one
The case where cutter 20;In another better embodiment, the string cutting apparatus can also cut position at each and respectively correspond
One cutter 20 is set;Alternatively, the cutter number that the string cutting apparatus includes also is smaller than and cuts positional number, the string cutting apparatus packet
At least one cutter 20 that can be moved horizontally in battery strings transmission direction is included, is switched between position with being cut at least two.
The utility model string cutting apparatus passes through be spaced apart two or more and cuts position, and it is pre- to produce head and the tail
The first kind battery strings and the second class battery strings that welding length is different are stayed, terminal box is arranged to photovoltaic module row to realize
It is furnished with outside the region of cell piece, solves terminal box to the occlusion issue of back side illuminaton light, promote the efficiency of two-sided photovoltaic module.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model
Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model
Equivalent implementations or change should be included within the scope of protection of this utility model.