Double-glass photovoltaic module with back glass being separated

Abstract

The invention relates to a double-glass photovoltaic module with back glass being separated, which comprises a face plate, a battery string and a back plate, wherein the battery string is packaged between the face plate and the back plate. Busbar strips of the battery string are connected with a terminal box on the back plate which is formed by integrally jointing back plate units, and the busbar strips of the battery string are led out through joints of the back plate units to be connected with the terminal box. Compared with traditional double-glass modules, the double-glass photovoltaic module has the advantages that the problems of cost increase of back perforation of the double-glass module and self-destruction of the module due to stress concentration at perforated positions can be solved, and the problem of poor impact resistance and insulating performance of the terminal box on the lateral side of the double-glass module is solved.

Description

technical field [0001] The invention relates to a double-layer glass photovoltaic module with separate back glass. Background technique [0002] The traditional double-glass module generally has two pieces of glass on the front and back of the same size, and uses a small junction box on the side. The disadvantage of this structure is that the junction box is very small, and the size of the diode is limited. Small diodes generally have a small current. Moreover, the box body is small, which is not conducive to heat dissipation; the impact resistance of such a junction box structure is very poor; the bus bar is led out through the side of the glass, and the internal charged body is almost in contact with the edge, and the distance is small, which has a great impact on the insulation performance. [0003] Some upper and lower glass have different lengths, and the same junction box is installed on the front glass, which also has the above problems. [0004] Some double-glazed c...

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Problems solved by technology

[0002] The traditional double-glass module generally has two pieces of glass on the front and back of the same size, and uses a small junction box on the side. The disadvantage of this structure is that the junction box is very small, and the size of the diode is limited. Small diodes generally have a small current. Moreover, the box body is small, which is not conducive to heat dissipation; the impact resistance of such a junction box structure is very poor; the bus bar is drawn out through the side of the glass, and the internal charged body is almost in contact with the edge, and the distance is small, which greatly affects the insulation performance.

[0004] Some double-layer glass components use a crescent-shaped rear glass end. Such a structure requires the design of a new junction box, and the design of the bottom of the junction box is complicated. At the same time, it is difficult to apply glue, which is very likely to cause poor sealing.

[0005] Some double-glass structures have holes or grooves on the back glass, so that conventional junction boxes can be used, but the cost of opening holes in the back glass is high, and the local stress concentration of the glass after opening is very easy to self-explode

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