Low-junction-temperature photovoltaic junction box and chip assembly therefor

Abstract

The invention discloses a low-junction-temperature photovoltaic junction box and a chip assembly therefor. The junction box comprises a chip module and a housing covering the chip module. The chip module comprises a chip assembly, and the chip assembly is provided with a circuit surface with a circuit, and a heat dissipation surface opposite to the circuit surface. The heat dissipation surface directly contacts with the housing. The chip assembly for the junction box comprises an aluminum substrate, a plurality of diodes, and a plurality of binding posts, wherein the diodes and the binding posts are connected to the aluminum substrate. One surface, connected with the diodes and the binding posts, of the aluminum substrate is the circuit surface, and the other surface, opposite to the circuit surface, of the aluminum substrate is the heat dissipation surface. A conventional junction box is formed by the jointing of a box body and a heat dissipation copper piece. However, the housing of the junction box directly contacts with the heat dissipation surface of the chip assembly, thereby forming a body, and enabling the heat dissipation capability of the body to be stronger. The junction box removes an air (hollow junction box) or silica gel (gluing junction box) heat conducting layer, reduces the thermal resistance, and enables the heat dissipation capability to be stronger than the conventional junction box by several times.

Description

technical field [0001] The invention relates to a low junction temperature photovoltaic junction box and a chip component used for the low junction temperature photovoltaic junction box. Background technique [0002] The photovoltaic junction box is a connector between the solar cell array formed by solar cell components and the solar charging control device. Next, it acts as a shunt to ensure that the output of good cells will not be blocked due to poor cells (barrel effect). A photovoltaic junction box generally consists of a box body, cables and connectors, of which the box body is the main part, including the box body, internal metal copper sheets, diodes, box covers, etc., where the box body and the box cover are connected to form the junction box. shell. Existing photovoltaic junction boxes are mainly divided into junction boxes with glue filling and hollow structures. Wherein, the hollow junction box plays the effect of sealing the box cover and the box body throug...

AI Technical Summary

Problems solved by technology

The limitation of the existing technology is that the junction temperature of the diode is too high, and it is difficult to further reduce it, which leads to the junction box becoming the shortest life of the photovoltaic module or the most prone to failure.

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