Super-flexible film battery assembly structure and preparation method thereof

Abstract

The invention discloses a super-flexible film battery assembly structure and a preparation method. The battery assembly structure comprises a substrate, a high sodium molybdenum layer, a functional molybdenum layer, a photoelectric conversion layer, a window functional layer and a front electrode layer, wherein the high sodium molybdenum layer is arranged on the surface of the substrate, the functional molybdenum layer is arranged on the surface of the high sodium molybdenum layer, the photoelectric conversion layer is arranged on the surface of the functional molybdenum layer, the window functional layer is arranged on the surface of the photoelectric conversion layer, the front electrode layer is arranged on the surface of the window functional layer, the substrate, the high sodium molybdenum layer, the functional molybdenum layer, the photoelectric conversion layer, the window functional layer and the front electrode layer are sequentially overlapped to form a complete structure of a film battery, the super-flexible film battery assembly structure further comprises surface main grids and surface fine grids, and the surface main grids and the surface fine grids are arranged on the surface of the front electrode layer of the complete structure of the film battery at intervals. According to the invention, a new battery structure and an implementation process method are adopted for the super-flexible film battery, so that packaging and manufacturing of the super-flexible photovoltaic battery and an assembly are completed, and the whole assembly product can be realized according to the designed battery structure and process.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cells, in particular to an ultra-flexible thin-film cell module structure and a preparation method. Background technique [0002] At present, the structure of photovoltaic cells is relatively mature. According to the types of photovoltaic cells corresponding to different technical routes, the overall structure has been fixed, and some cells with other structures obtained from structural innovations or changes are defined as new derivative high-efficiency cells. The preparation methods and process flow of each structural and functional layer of the battery are also relatively common, corresponding to the differences in the details of conventional scientific and technological means. In addition, the current mainstream photovoltaic cells use silicon as the base material to realize a rigid structure, which cannot be used in flexible applications; compared with silicon-based cells, there are many ...

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Problems solved by technology

In addition, the current mainstream photovoltaic cells use silicon as the base material to realize a rigid structure, which cannot be used in flexible applications; compared with silicon-based cells, there are many types of thin-film cells, but the structural problems are: the preparation of each functional layer of the film All need to use glass, stainless steel or flexible substrates with specific requirements as the basis. After the preparation of each functional layer, the shape is changed for the packaging process of subsequent components, and then the manufacturing of terminal photovoltaic products is achieved.

[0004] 1. Silicon-based batteries are packaged with flexible packaging materials with small curvature or small bendability. The formed component products can only show small curvature, and cannot form products required for applications with large curvature.

[0005] 2. Conventional thin-film batteries all have a substrate-integrated structure. Stainless steel substrates, metal substrates or organic material substrates are used. The prepared flexible thin-film batteries have the thickness and flexibility of the relevant substrates themselves, resulting in the thickness of the overall thin-film battery. Increased and poor flexibility, unable to achieve ultra-flexible structures and applications

[0006] 3. Use organic solar cell technology to prepare organic cells and components on ultra-thin organic flexible substrates. The biggest disadvantages of this technology are low efficiency, poor stability, short life, and inability to scale production

The disadvantages of this method are that there are many preparation processes, high requirements, narrow process window, high wafer cost, low material utilization rate, high product cost, and cannot achieve large-scale mass production.

[0008] 5. Ultra-flexible thin-film batteries and component products are currently relatively blank in the market, and there is a lack of related products, especially the lack of preparation methods for ultra-flexible thin-film batteries, which makes it impossible to achieve low-cost and mass production of ultra-flexible thin-film batteries

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