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Liquid injection is a critical process in lithium battery production, during which the precise transfer of electrolyte is crucial for the performance of battery cells. As the key functional components in the process, the performance of liquid injection valves, vacuum injection valves and back-pressure needles directly determines the uniformity of chemical substances inside the battery cells and the battery of the cycle life and the overall safety performance.
Since entering the lithium battery liquid injection technology field in 2009, Guangzhou Ascend Precision Machinery Co., Ltd. has built up profound technological expertise in the design, manufacturing and application of liquid injection valves, vacuum injection valves and back-pressure needles through long-term technological research, development and engineering practices.
–Liquid injection valves: Assurance of high-precision metering and dynamic sealing
As a basic execution unit for the electrolyte transfer, liquid injection valves must meet the core requirements of high-precision metering and dynamic sealing. For the specific chemical properties of electrolyte and complex working conditions of manufacture, Guangzhou Ascend Precision relied on fluid mechanics simulation and materials science research and developed multiple series of liquid injection valve products. Optimizing both the structure of the valve core and the selection of sealing materials effectively reduces the risk of residual at the valve port under normal-pressure liquid injection conditions, enhances the stability and consistency of the liquid injection process, and thus ensures the infiltration effect of the battery cell electrolyte.
-Vacuum injection valves: Key to efficient filling and high-vacuum sealing
With the improvement of battery energy density and process innovation, vacuum liquid injection valves play a key role in eliminating internal bubbles in battery cells and improving the infiltration efficiency of electrolyte. In the research and development of vacuum injection valves, the high-efficiency filling of electrolyte is achieved through the precise control of the coordination between vacuum degree and liquid injection flow rate. These valves feature a special sealing structure design to ensure stable sealing performance even under high-vacuum conditions, effectively preventing air ingress and electrolyte leakage, thus providing a reliable guarantee for improving the performance of battery cells.
–Back-pressure needles: Core of stable liquid injection and process adaptation
In the liquid injection system, back-pressure needles assume the function of pressure regulation and stabilization, whose performance directly affect the injection accuracy and the consistency of battery cells. For the back-pressure needles, a modular design is adopted in the needles to ensure the stability of the electrolyte injection process, which contributes the needles to flexibly adapt to the injection process requirements of batteries in different shapes, such as prismatic, cylindrical, and blade batteries. This design demonstrates excellent adaptability to various working conditions in the production of power batteries and energy storage batteries.
Verified by the market, the liquid injection valves, the vacuum liquid injection valves, and the back-pressure needles of Guangzhou Ascend Precision have been extensively applied in the production lines of leading enterprises in China’s lithium battery industry. They have also successfully achieved mass supply to international markets such as South Korea, Europe, and the United States. Building upon long-term process optimization and the accumulation of equipment operation data, Guangzhou Ascend Precision has established a comprehensive product performance database, providing robust technical support for the industry process improvements.
In the future, with the continuous iteration and upgrading of new energy battery technology, Guangzhou Ascend Precision will further deepen the technical research on core components such as liquid injection valves, vacuum liquid injection valves, and back-pressure needles, so as to provide solutions with greater engineering application value for the industry.
http://www.ascendtechs.com
Guangzhou Ascend Precision Machinery Co.,Ltd.
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