Processing method of junction box for solar power generation module

Abstract

The invention relates to a junction box for a solar power generating assembly and a machining method of the junction box, and provides a junction box of a solar power generating assembly, which is relatively low in cost and relatively high in application efficiency on the premise of guaranteeing the in-situ protection of hot spots of a solar panel, as well as a machining process of the junction box. The junction box comprises a box body, wherein a first substrate, a second substrate, a third substrate and a fourth substrate are arranged inside the box body, the first substrate, the second substrate, the third substrate and the fourth substrate are respectively provided with a bus bar connector of a battery piece in the solar power generating assembly, and the first substrate and the fourth substrate are also provided with a positive connecting wire connector and a negative connecting wire connector which are output by the solar power generating assembly; the first substrate, the second substrate and the third substrate are respectively provided with a first groove, a second groove and a third groove; a first diode chip, a second diode chip and a third diode chip are respectively arranged in the first groove, the second groove and the third groove. According to the junction box of the invention, the structural mode of the junction box for the traditional solar power generating assembly is changed, the chips are directly arranged on the substrates, and then the substrates are integrally formed in an injection manner, so that the production procedures can be reduced, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a junction box for solar power generation components, in particular to a junction box with a bypass protection function and a processing method thereof, in which a semiconductor chip is directly welded and integrally injected and formed at one time. Background technique [0002] The solar power generation module is a power generation unit part of the solar power generation system (station). Grid powered. [0003] The solar power generation components in the solar power plant system generate electricity under normal sunlight and output electric energy to the outside. However, when the sunlight irradiating a certain part of the power generation component is blocked by an object or the shadow of the object, the silicon battery sheet at this part changes from a power generation state to a resistance state, and other power generation components connected in series with it normally generate power under sunlight, and the current pass...

AI Technical Summary

Problems solved by technology

There are many steps in the production and installation process of the junction box, and the labor consumption is relatively large

[0007] Junction boxes for solar power generation components are currently implemented in accordance with the IEC-61215 standard; it is difficult for existing junction boxes to meet the requirements of certain items in the standard: for example, the sealing standard for junction boxes for solar power generation components, for junction boxes The structure of the box cover and the material of the sealing ring are very high. Generally, the products of the junction box factory have to go through many adjustments, improvements and tests before they can pass the test requirements of the certification body; There will be a decrease in sealing performance and internal corrosion, which will affect the service life

[0008] Electrical creepage distance requirements, the distance from the gap between the junction box and the box cover to the internal conductor is not less than 20mm, which requires increasing the volume and internal structure of the junction box to meet the requirements, increasing the amount of materials and cost; the existing technology of wiring There is a certain amount of space inside the box, and the internal space is required to be sealed to the outside.

When the diode is working inside the junction box, its heat will cause the internal air to expand, which will increase the pressure inside the box and cause the box body and box cover to deform and collapse. Therefore, it is necessary to use a more expensive waterproof and breathable membrane to solve the problem of air expansion and increase Material and installation costs; the above problems not only greatly increase the difficulty for the junction box to meet the IEC-61215 standard, but also greatly increase the product manufacturing cost

However, from the perspective of structure and application requirements, the module is still fixed inside the junction box by means of installation, and the junction box needs to meet the original sealing requirements and ventilation requirements; the chip in the module is limited by the structural process and cannot be equipped with a stress buffer structure

Under the influence of its large volume and different materials under the influence of working temperature, material expansion will have a stress effect on the chip, which has a certain impact on the service life of the product

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