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Mingguan n-type battery packaging overall solution, leading the upgrade of component packaging technology

From May 24th to 26th, the world's most influential photovoltaic event - SNEC Photovoltaic Exhibition was held in Shanghai. At the scene, International Energy Network visited Mingguan New Materials.

2023 is the year when n-type technology will be fully scaled up. Enterprises have launched n-type products one after another, and hundreds of gigawatts of production capacity are under construction. The entire photovoltaic industry chain is ready for upstream silicon materials, silicon wafers, batteries, modules, and even backplanes, adhesive films, and silver pastes. China's photovoltaic industry is moving towards the n-type era in an all-round way.

Then, why does China’s photovoltaic industry rapidly carry out technological iterations, what technical pain points still exist in the n-type era, and how companies face various impacts brought about by technological iterations? I met the relevant person in charge of Mingguan New Materials and listened to him reveal the answers to the above questions.

In the n-type era, technology iterations are not limited to batteries

The photovoltaic industry is a complete industrial chain. The emergence, development, and further advancement of any technology into the mainstream technology of the industry requires the cooperation of the upstream and downstream of the industrial chain. At the same time, the photovoltaic industry is a very fine-grained industry. Technology upgrades and then technical iterations are completed through bit by bit technological progress, and the process from quantitative change to qualitative change is completed.

Just like the current industry hotspot - n-type technology, many people may turn their attention to the field of batteries and modules, focusing on the conversion efficiency of TOPCon or HJT batteries and modules, while ignoring that the improvement of battery and module efficiency is only the final result . In this process, silver paste, adhesive film, and backplane have also made important contributions, and technology upgrades and iterations are also required in the n-type era.

According to the person in charge of Mingguan, although the n-type battery technology has many advantages such as high conversion efficiency, high bifaciality, low attenuation, and low temperature coefficient, the special structure of the n-type battery has great impact on the anti-PID performance of packaging materials, Corrosion resistance, water resistance, adhesion and other aspects have more stringent requirements.

The packaging materials used in the past for p-type components are not enough to meet the needs of the n-type era. In order to shift the photovoltaic cell module technology from p-type to n-type with higher efficiency, it is necessary to solve the problem of packaging materials, and to have a packaging solution suitable for n-type cell modules. This is a real problem facing the entire industry.

With six core technologies, Mingguan leads the upgrade of packaging technology

The photovoltaic industry has many subdivisions, and each subdivision has its own leading enterprises. The leading enterprise of green fluorine-free backsheet is undoubtedly Mingguan New Materials.

Founded in 2007, Mingguan New Materials is a national high-tech enterprise specializing in the research, development, production and sales of new energy and new composite membrane materials. Bright Crown solar backsheet is widely used in solar cell modules, and currently can meet the supply demand of 50GW modules. The shipment of green fluorine-free BO backsheets ranks first in the world.

After years of continuous investment and technology accumulation, Mingguan New Materials has obtained more than 130 patents including invention patents with independent intellectual property rights, and has developed functional polymer film development technology and special adhesive development technology in the field of new energy power supply packaging materials. , material interface processing technology, material optical design technology, precision coating technology, functional material dispersion technology and other six core patented technologies.

In the field of packaging materials, Mingguan New Materials has led the industry's technological upgrades many times. In 2012, Bright Crown launched the world's first green fluorine-free BO backsheet; in 2014, Bright Crown successfully developed the world's first 1500V solar backsheet and applied it on a large scale; in 2019, it created the first black high-reflective backsheet; in 2022, Bright Crown made its global debut HJT battery grid film.

On May 24, during the SNEC exhibition, Mingguan New Materials obtained the accreditation qualification of Dekai's "witness laboratory". It can be said that this is the recognition and affirmation of Mingguan New Material's technical research and development strength over the years.

Create a full range of n-type battery solutions with extreme packaging technology

Now the photovoltaic industry is once again at the crossroads of technological iteration. Photovoltaic module packaging materials are facing the problem of industrial upgrading. At the critical moment of technology iteration, Mingguan New Materials took the lead in launching the overall solution of n-type battery packaging materials, leading the further upgrading of photovoltaic packaging technology.

For n-type battery packaging, Mingguan New Materials is very forward-looking. As early as 2017, Mingguan New Materials cooperated with leading n-type technology companies such as SHARP, LG, and REC to research and develop the overall solution of packaging materials such as BO high-efficiency backplanes, wire substrates, grid films, and high-efficiency adhesive films for n-type batteries. Solution, comprehensively solve TOPCon, HJT, IBC battery packaging problems and achieve mass shipments.

POE film makes n-type battery packaging more reliable

Mingguan New Materials pointed out that POE film is superior to EVA film in terms of water resistance, hydrolysis resistance, corrosion resistance, and PID resistance, and is more in line with n-type component packaging requirements. POE film is prone to problems of cross-linking efficiency and slippage in the lamination process matching process during the module manufacturing process. In this regard, Mingguan New Materials has optimized and upgraded the material formula and process design, which has improved the anti-skid property and cross-linking degree during the lamination process of components.

Actinia series grid film, for the deep cost reduction of HJT components

The key points of the packaging of HJT components are adhesion, water resistance, UV barrier, low modulus and no busbar welding. In this regard, Mingguan New Materials proposed a solution of Actinia series grid film plus POE film. The Actinia series grid film not only improves the characteristics of non-busbar cells and adhesive films that are not easy to bond, but also improves light transmission, adhesion and water resistance, and can reduce the amount of low-temperature silver paste for HJT cells by up to 45%, achieving The maximum cost reduction space for HJT batteries.

POE film + BO backplane solution makes IBC components more economical

The difficulty of packaging IBC components is that there is no metal grid line on the front, and the appearance requirements are higher; the wiring on the back is soldered, and the corrosion resistance requirements are high. In this regard, Mingguan New Materials proposed a POE film and BO backplane solution. This solution has many characteristics such as good anti-PID performance, strong corrosion resistance and aesthetic appearance.

It can be said that in the field of n-type technology packaging, Mingguan, with the attitude of pursuing the ultimate, comprehensively solves n-type packaging problems from the three dimensions of technology, solutions, and products, laying a solid foundation for the arrival of the n-type era.

From being the world's number one in the green fluorine-free backsheet industry to being an expert in n-type battery packaging materials, Mingguan New Materials has continued to create value for new energy battery packaging and help the industry's green development during the critical period of technological iteration and industrial upgrading.