Silicon Anode Material Special Gas Cabinet

Amid the rapid development of the new energy sector, innovations in lithium battery technology have become the industry's focal point. Silicon anode materials, valued for their high theoretical specific capacity, are regarded as key to enhancing lithium battery energy density and are poised to drive a new leap forward in battery technology.

However, the production process of silicon anode materials is highly complex, imposing stringent demands on the delivery and control of specialty gases. Within this system, the specialty gas cabinet—as the core equipment of the specialty gas system—directly impacts production safety and stability through its performance.

As a leader in the specialty gas control industry, Wofly Technology leverages years of technical expertise and innovation to develop high-performance specialty gas cabinets tailored for silicon anode material production. These cabinets not only ensure production safety but also empower the industry to enhance production efficiency and product quality.

Special Gas Challenges in Silicon Anode Material Production

Silane gas (SiH₄) plays an indispensable role in the production of silicon anode materials. Through chemical vapor deposition (CVD), it forms a conductive carbon layer on the surface of silicon particles, significantly enhancing the cycle life of batteries. However, silane gas is highly reactive and self-igniting, readily combusting or even exploding in air. Its transportation and control have become major technical bottlenecks in the mass production of silicon anode materials.

How to ensure efficient utilization of this specialty gas while eliminating safety hazards such as leaks, combustion, and explosions has become a critical challenge facing the industry.

Part.1 Ultimate Sealing, Eliminating Leakage Risks

Wofly Technology's specialty gas cabinets employ VCR metal sealing technology for connections. This method utilizes metal gaskets to achieve sealing with a leakage rate as low as 10⁻¹⁰ Pa·m³/s, virtually eliminating the possibility of gas leakage. In material selection, nickel-based alloy gaskets are prioritized. Compared to conventional threaded connections, this significantly reduces micro-leakage risks, providing the first line of defense for transporting high-risk gases like silane.

Part.2 Multi-layered protection, building a fortress of security

The gas delivery system operates under positive pressure. Upon detecting a gas leak, the system immediately initiates a displacement procedure to rapidly dilute the leaked gas, preventing it from reaching explosive concentrations. Simultaneously, the specialty gas cabinet integrates multiple sensors including infrared probes, temperature sensors, and pressure monitors to enable comprehensive real-time monitoring of gas conditions. This data is processed through a fully automated monitoring system, enabling not only remote control but also prompt alerts during anomalies, granting operators critical response time. Furthermore, dual-line redundancy design at key junctions ensures that even single-point failures won't compromise overall gas delivery safety, guaranteeing continuous and stable production processes.

Part.3 Precision craftsmanship ensures gas quality

In terms of production processes, Wofly Technology employs cold cutting technology for pipeline processing, eliminating contamination of gases by metal particles generated during thermal cutting. Simultaneously, fully automated welding machines are utilized for pipeline welding, with stringent quality control ensuring every weld meets zero-defect standards. This further reduces the risk of gas leakage, safeguarding the purity and quality of specialty gases throughout the transportation process.

Production Safety

Exhaust Gas Treatment: Fulfilling Environmental Responsibilities

If silane gas tail gas is directly discharged without proper treatment, it will generate silica dust and unreacted flammable gases, posing serious threats to the environment and safety.

Wofly Technology places high importance on the tail gas treatment process and has developed a comprehensive solution for it. For combustible gases like hydrogen, dilution discharge is employed to reduce their concentration below the lower explosive limit, ensuring safe and compliant emissions. Our investment and innovation in tail gas treatment not only demonstrate the company's unwavering commitment to safe production but also reflect its strong sense of environmental responsibility.

Exhaust Gas Treatment

Industry Pain Points and Wofly Technology's Response Strategy

Despite the gradual maturation of silicon anode material technology, two major challenges persist in mass production: First, persistently high gas costs, with specialty gases like silane accounting for 15%-20% of total material expenses. Optimizing processes to reduce gas consumption has become an urgent priority. Second, safety concerns at scale. As production expands, precisely matching gas flow rates, pipe diameters, and pressures becomes increasingly critical. Excessively high flow rates can readily trigger combustion or explosion risks.

Actively addressing challenges

On one hand, we conduct in-depth research into production processes to develop integrated “gas-equipment” solutions. By optimizing gas delivery and control strategies for specialty gas cabinets, we effectively reduce gas consumption, targeting an 18% reduction in gas costs. On the other hand, leveraging extensive engineering experience and a specialized technical team, we provide customers with customized, large-scale production solutions. Based on varying production scales and process requirements, we precisely design pipe diameters, pressures, and gas flow rates to ensure safe and stable gas delivery even during mass production.