Junction box and wiring method therefor

Abstract

The invention discloses a junction box. The junction box comprises a junction box body, and a wiring part, wherein the wiring part comprises a metal conductive block and a tin layer which is arranged on the metal conductive block; a groove which allows the end part of a bus bar to enter is formed in the metal conductive block; the end part which enters the groove is connected with the inner wall of the groove in a conduction manner; and the part, on the upper reach of the end part, of the bus bar is fitted with the tin layer. According to the junction box provided by the invention, the metal conductive block can be connected with the bus bar in multiple places, so that the connection tensile property between the metal conductive block and the bus bar is improved; furthermore, by virtue of the connection between the inner wall of the groove and the bus bar, the connection area can be enlarged to the maximum, and the connection firmness between the metal conductive block and the bus bar is improved; therefore, the connection strength between the wiring part and the bus bar is remarkably improved; and the conditions of splitting or releasing between the bus bar and the wiring part can be reduced or even avoided, so that the normal operation of a solar cell module is ensured. The invention also provides a wiring method for the junction box.

Description

technical field [0001] The present invention relates to the technical field of solar cell module manufacturing, and more specifically, to a junction box, and also to a connection method for the junction box. Background technique [0002] The solar cell module junction box is a connector between the solar cell array formed by the solar cell module and the solar charging control device, and its main function is to connect the internal circuit of the solar cell module with the external circuit. [0003] The junction box is glued to the back plate of the solar cell module through silica gel, and the lead-out busbar in the solar cell module is connected to the terminal post in the junction box to realize the conduction between the internal circuit of the battery module and the external cable. In the prior art, the top end surface of the terminal post of the welded glue-filled junction box is coated with a tin layer. When connecting with the bus strip, the bus strip is directly pr...

AI Technical Summary

Problems solved by technology

However, the inventors have found that the method of connecting the bus strip and the top surface of the terminal post only through solidified tin often causes the bus strip to break off from the terminal post, and the reason is that the welding tension between the bus strip and the terminal post Insufficient or insufficient welding area, and the solar cell module is heated up due to light work, which makes the AB two-component potting glue expand and contract day and night, so that the connection parts are subjected to changing pressure

In practical applications, after the busbar is detached from the terminal, the voltage of the solar cell module will be low, and in severe cases, it will even cause the power station to catch fire, which has a serious impact on the quality of the solar cell

Images