A waterproof junction box for solar modules

Abstract

A waterproof junction box for solar modules, including a box shell seat, a wiring module and a box cover. The intersection is provided with a main drainage groove, and a secondary drainage groove and a guard plate are arranged on the top of the surrounding side plates, and the size of the cover plate on the box cover matches the upper opening clearance of the box shell seat. In rainy days, the rainwater that hits the back of the battery pack and the junction box first flows into the main drainage tank, and is concentrated and quickly discharged. The very small amount of stagnant water enters the secondary drainage tank along the surrounding side panels and is drained away. Rainwater drips along the guard plate, even if it rains heavily, no water will enter the inner cavity of the box shell seat, which fundamentally eliminates the phenomenon of water immersion of the junction module in the junction box, and completely eliminates the battery components caused by the junction box being soaked in water. short circuit problem.

Description

Technical field: [0001] The invention relates to a solar battery module, in particular to a junction box of a solar battery module. Background technique: [0002] The solar cell module junction box plays a very important role in the solar module. It is a connecting part that transmits the power generated by the solar cell to the external power line. The junction box is set on the back of the solar cell module, and is glued to the back plate of the battery module through silica gel. The connection line in the junction box includes the electrode wires of the battery strings in the battery module, output cables, diodes and terminals. The module is used to output the electric energy generated by the solar battery module through the output cable through the wiring module. Current junction boxes such as figure 1 As shown, it consists of a box case base 1, a wiring module 2 and a box cover 3, the wiring module 2 is fixed in the box case base 1, and the box case base 1 is composed...

AI Technical Summary

Problems solved by technology

Current junction boxes such as figure 1 As shown, it consists of a box case base 1, a wiring module 2 and a box cover 3, the wiring module 2 is fixed in the box case base 1, and the box case base 1 is composed of a bottom flange 11, surrounding side plates 12 and buckle protrusion body 13, the surrounding side plates 12 are fixed on the bottom flange 11, the buckle convex body 13 is symmetrically arranged on the inner side of the surrounding side plates 12, and the box case seat 1 is bonded to the back of the battery assembly 4 through the bottom flange with silica gel. on the plate; the lid 3 is made up of a cover plate 31, a positioning side plate 32 and an elastic chuck 33, the elastic chuck 33 is arranged on the positioning side plate 32, and the bayonet and The plug-in connection of the buckle is connected, that is, the elastic chuck 33 on the box cover 3 is inserted into the buckle convex body 13 of the box shell seat 1, and the cover plate 31 on the box cover 3 covers the surrounding side plates 12 of the box shell seat 1 , due to the bayonet connection between the box cover 3 and the box case seat 1, there is a gap at the junction of the two, and the inner cavity of the box case seat 3 is not sealed with the outside world, although the box case seat 1 and the back plate of the battery assembly 4 Silicone is used for sealing and bonding, but in actual use, the battery assembly 4 is installed obliquely, the installation angle β between the battery assembly 4 and the horizontal plane is 45°-75°, and the battery assembly 4 is installed If it is used in a rainy day, it will inevitably be corroded by rain and snow. In a rainy day, after the rain falls on the back plate of the battery assembly 4, it will flow down along the side panel of the junction box. When it flows to the box cover 3 and the box shell The joint of the seat 1 must flow into the inner cavity of the box shell seat 1 from the joint gap between the two. Usually, the amount of rainwater flowing into the inner cavity of the box shell seat 1 is not much, and at the same time it flows into the inner cavity of the box shell seat 1 A small amount of rainwater will also flow out of the joint gap at the lower end, which will not affect the normal use of the junction box. However, when there is a heavy rain, the amount of rainwater flowing into the box shell seat is too large and too fast, and the water entering the inner cavity If it cannot be discharged immediately, the power connection module in the box shell seat will be soaked in water, which will easily cause the entire solar cell module to be short-circuited and burnt out

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