Tianjin Blue Sky Sun Technology Co., Ltd. is a wholly-owned subsidiary of China Electronics Technology Group Corporation's Electric Power Shenzi Group. It is a high-tech enterprise dedicated to the research and development, production, sales, and service of electric energy system products. Our main business includes gallium arsenide epitaxial materials, lithium-ion cathode ternary materials, and electric energy system integration. Typical products include gallium arsenide epitaxial wafers, NCM523 cathode materials, photovoltaic grid connected power stations, wind and solar oil storage off grid power stations, megawatt level energy storage containers, lithium battery PACKs and portable energy storage power supplies, customized electronic power supplies, ultra-low temperature starting lead-acid batteries, and customized photovoltaic modules. The company firmly implements the development strategy of strengthening the enterprise through talent, technological innovation, and key technology breakthroughs, continuously improves its core competitiveness, and has established the Tianjin Gallium Arsenide Solar Cell Key Laboratory. The company has successively undertaken a number of key scientific and technological projects, including the "Key Technology for Industrialization of Megawatt level High magnification Concentrated Compound Solar Cells" project of the National 863 Program of the Ministry of Science and Technology, the "Industrialization of New Solar Cells and Components" project of the Ministry of Industry and Information Technology, and the "Efficient Thousand fold Concentrated Photovoltaic Components" project of the Tianjin Science and Technology Commission; It has successively passed ISO9001 international quality system certification, CE certification, and TUV certification, and is an expert unit accepted by the International Electrotechnical Organization's Concentrated Photovoltaic Group (IEC WG7) in China.

Lithium battery drying room, new energy drying roomTo prevent moisture from affecting lithium batteries, the lithium battery production line should be placed in a drying room. A drying room is a room that uses a dehumidifier to reduce the humidity of the air in the room to a certain required range. Lithium battery drying room refers to a room with relatively low humidity for the production of lithium batteries.

The moisture content in lithium battery materials is one of the main sources of moisture in the battery cells, and the higher the environmental humidity, the easier it is for the battery materials to absorb moisture from the air. On the contrary, the better the humidity control of the environment, the more limited the ability of battery materials to absorb moisture from the air. At present, there is a recommended humidity control ladder for lithium battery production workshops (for reference only, humidity control is operated according to the actual situation of each battery enterprise):

Workshop with relative humidity ≤ 30% (such as mixing, coating machine head, tail, etc.)

Workshop with relative humidity ≤ 20% (such as rolling, slicing, baking, etc.)

Workshop with relative humidity ≤ 10% (such as lamination, winding, assembly, etc.)

Dew point temperature ≤ -45 ℃ Workshop (such as cell baking, liquid injection, sealing, etc.)

Even if controlled according to the above humidity gradient, it is necessary to control the residence time of the process.

The lithium battery drying room is designed to control the humidity in the environment of the lithium battery production line.