Background technology:
With the depletion of traditional energy and human attention to environmental issues, in order to achieve the sustainable development of energy and environment, solar power generation as a clean energy has been greatly developed. Solar panel is a device that collects solar energy and converts solar energy into electric energy. The current emitted by the panel is exported and conducted by means of junction box, so the junction box is an important auxiliary device in photovoltaic power station. In the prior art, the photovoltaic junction box is generally directly installed on the corresponding solar panel and connected with the bus bar on the panel. The photovoltaic junction box is equipped with conductive terminals and diodes, and the anode and cathode of each diode are respectively welded on a pair of adjacent conductive terminals. As shown in Figures 1 and 2, in the prior art, the bus bar is placed on the upper surface of the terminal box end 1, and then the bus bar 2 is welded and fixed with the terminal box in the solder slot 11 at the end. However, because the junction box works under high current for a long time, if the bus bar and the conductive terminal of the junction box are not firmly welded, it is easy to break down and burn, and the current of the junction box and bus bar cannot be derived, which has a great impact on the safe and stable operation of the photovoltaic power station.
Technical realization elements:
In order to solve the technical problem, the invention provides a junction box and a wiring method of the junction box, which is used to solve the problems in the prior art that the conductive terminals of the current collecting bar and the junction box are not firmly welded, easy to break down and burn, and the current of the junction box and the bus bar cannot be derived.
In order to solve the above problems, the invention provides a junction box for connecting with the bus bar of the battery board. The thickness of the end connected between the junction box and the bus bar increases along the extension direction of the bus bar, and the end is sleeved with a snap ring to fix the bus bar on the end.
The further improvement of the invention is that the shape of the end is a two-stage ladder shape, the end forms a lead-in end at the place with small thickness, a fixed end at the place with large thickness, and the snap ring is sleeved to fix the bus bar at the fixed end.
The further improvement of the invention is that there is a transition slope or transition surface between the lead-in end and the fixed end.
The further improvement of the invention is that the upper surface of the lead-in end is also provided with a solder groove for welding the bus bar.
The further improvement of the invention is that the material of the snap ring is metal sheet or hard plastic, and the width of the built-in space of the snap ring is less than or equal to the sum of the thickness of the fixed end and the bus bar.
The invention also provides a wiring method of a junction box, comprising the following steps:
S11: provide a junction box. The end of the junction box is provided with a lead-in end with smaller thickness and a fixed end with larger thickness along the extension direction of the bus bar, and the snap ring is sleeved on the lead-in end;
S12: providing a bus bar extending through the snap ring to the upper surface of the fixed end;
S13: push the snap ring to the fixed end and fix the bus bar on the end;
S14: provide an electric soldering iron to weld the bus bar to the lead-in end.
The further improvement of the invention is that the upper surface of the lead-in end is also provided with a solder tank for welding the bus bar, which also comprises:
An electric soldering iron is provided to weld the bus bar to the lead-in end, comprising:
The bus bar is welded in the solder bath.
Compared with the prior art, the invention has the following beneficial effects:
The invention sets the thickness of the inlet of the bus bar at the end of the junction box into a thin structure, and sets a snap ring on the end, so as to fix the bus bar at the end of the junction box. The invention has simple and fast operation, avoids the risk that the components cannot work normally caused by the poor welding of the bus bar, and helps to reduce the production rework and reduce the production cost.