Photovoltaic temperature control junction box

Abstract

The photovoltaic temperature control junction box comprises a box body (1) with a box door, and a plurality of cable terminals and a junction box body (2) for accommodating the cable terminals are arranged in the box body (1); heating cavities (4) are formed in the two sides of the interior of the junction box body (2) respectively, and electric heating pieces (5) are arranged in the heating cavities (4); a temperature and humidity switch (6) is arranged in the junction box body (2), the control output end of the temperature and humidity switch (6) is connected with the control input end point of the electric heating piece (5), and the temperature and humidity switch (6) is matched with a cable terminal. According to the technical scheme, corresponding temperature control heating is carried out on the wiring ends of the terminals of the two secondary cables, the temperature of the wiring ends of the terminals of the secondary cables is guaranteed, and therefore the vitrification phenomenon of the SCT tube (7) is prevented, the insulation performance of cable terminal wiring is guaranteed, and safe operation of a system is maintained.

Description

technical field [0001] The invention relates to a photovoltaic temperature-controlled junction box, which belongs to the field of power supply equipment. Background technique [0002] Photovoltaic power generation is a new type of power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. There are two modes of independent operation and grid-connected operation. Large-scale solar photovoltaic power generation systems generally adopt the form of centralized power generation. In the centralized photovoltaic power generation system, the power output terminal of each photovoltaic module transmits power to the controller, inverter, battery and other accessories of photovoltaic power generation. When the photovoltaic transmission line is laid, it needs to pass through the relay of the terminal box, which must form a number of cable terminals in the terminal box, and connect the...

AI Technical Summary

Problems solved by technology

Due to the influence of the external low temperature environment (such as the temperature drops below minus 20 degrees Celsius), the temperature in the junction box is low, and the SCT tube will undergo a glass transition process such as a decrease in elastic modulus and a decrease in toughness in this environment, making the SCT tube The insulation performance of the cable is reduced, and there will be a partial arc discharge phenomenon at the terminal or terminal of the cable, which will affect the power transmission of photovoltaic power generation

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