The sound of firecrackers fell on site, and the roof pouring was completed. The tackling team witnessed this moment of topping out together. This is a landmark achievement in the 100 day labor competition. The project team has rooted themselves in the Northwest Chemical Industry Park, fighting against unfavorable environments such as strong winds and large temperature differences between day and night, and steadily advancing construction under high standard construction requirements. From the binding of foundation steel bars to the installation of tall formwork, every process is repeatedly checked. Everyone works in two shifts to rush towards the subsequent construction goals, striving to seize the key construction period for the landing of the entire sodium electricity industry chain.

The project is full of weight

The project is located in Yanchi Chemical Industrial Park, Ningxia, and is the first sodium electricity full industry chain project in the area, with a total investment of 3.3 billion yuan. After completion, it can produce 60000 tons of composite sodium iron phosphate positive electrode material, 30000 tons of bituminous coal based hard carbon negative electrode material, and 10 GWh of battery cells. The testing workshop that was topped out this time has a building area of 4622.36 square meters and is a control project that connects material production and battery assembly.

Tackling difficulties and tackling challenges

There are strong winds and large temperature differences in autumn and winter in the local area. The workshop adopts a cast-in-place frame structure, with a maximum support of 8.5 meters, and high construction control requirements. The project adopts a buckle type steel pipe support frame, and real-time monitoring of settlement displacement is carried out synchronously. The monitoring frequency is increased during the pouring period, and a warning and stop pouring mechanism is implemented. Green construction is carried out synchronously, and dust and noise are strictly controlled. The main structure is accepted in one go. Keywords: capped sodium battery base, polyanion route, new energy storage

Outstanding industrial value

After mass production of the project, the comprehensive cost of the battery is reduced by about 30% compared to mainstream lithium iron phosphate batteries, and the cycle life can reach 15000 times. It has excellent low-temperature fast charging performance and stable discharge in extremely cold environments. The implementation of the project can fill the gap in the local sodium electricity industry chain, drive employment for over a thousand people, and provide new solutions for the new energy storage track.Editor/Li Xiaohua