Superparamagnetic electrically conductive fluid material, method for its preparation and magnetically connected laminated photovoltaic assembly

By using superparamagnetic conductive fluid materials for magnetic connection in photovoltaic modules, the problem of short circuits caused by high viscosity of conductive adhesive was solved, enabling controllable disassembly and tight arrangement of solar cells, thus improving production efficiency and module performance.

CN115020000BActive Publication Date: 2026-08-28HUANENG CLEAN ENERGY RES INST
3 Cites 0 Cited by

Patent Information

Application Number
CN202210867616.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-07-21
Publication Date
2026-08-28
Estimated Expiration
2042-07-21

AI Technical Summary

Technical Problem

In existing crystalline silicon matrix tandem photovoltaic modules, the conductive adhesive has high viscosity and is difficult to control, which can easily lead to cell adhesion, adhesive overflow, and short circuits. Furthermore, traditional conductive adhesives are difficult to swell and decompose, affecting production yield and module performance.

Method used

Superparamagnetic conductive fluid material is used and coated onto the overlapping connection area of ​​the solar cells through magnetic connection. It is rapidly magnetized under the action of a magnetic field and loses its magnetism after the magnetic field disappears, so as to realize the controllable disassembly and replacement of solar cells and avoid short circuits caused by glue overflow.

Benefits of technology

Reduce cell waste, improve production yield, reduce the difficulty of module decomposition and dismantling, achieve close arrangement and uniform connection, avoid cell displacement, improve module efficiency and reduce costs.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides a superparamagnetic conductive fluid material, a preparation method thereof and a magnetically connected laminated photovoltaic module; the preparation method comprises the following steps: a) dissolving FeCl2*4H2O and FeCl3*6H2O in water, then adding an NH3*H2O aqueous solution to carry out a coprecipitation reaction, separating and cleaning a solid product to obtain a Fe3O4 magnetic fluid; b) mixing the Fe3O4 magnetic fluid obtained in the step a) with a nano-silver conductive adhesive and a diluent, and carrying out ultrasonic dispersion to obtain the superparamagnetic conductive fluid material. Compared with the prior art, the application first synthesizes a superparamagnetic conductive fluid material, then coats the superparamagnetic conductive fluid material on a battery sheet overlapping connection setting area in a coating mode, the superparamagnetic conductive fluid material is rapidly magnetized under the action of a magnetic field, and loses magnetism rapidly after the external magnetic field disappears; when a single battery sheet has a defect, the damaged battery sheet can be easily disassembled and replaced, so that the waste of the battery sheet is reduced; meanwhile, the superparamagnetic conductive fluid material can also be used for the recycling and disassembly of the module after retirement.
Need to check novelty before this filing date? Find Prior Art