Product Name:
Lithium Battery Filling Equipment Zirconia Ceramic Metering/Shut-off Valve
Product Material:
High-Purity Yttria-Stabilized Zirconia Ceramic (Y-TZP). For valve stems or balls with extreme wear resistance requirements, Silicon Carbide (SiC) or Silicon Nitride (Si₃N₄) coatings or components can be compounded.
Material Characteristics:
Exceptional resistance to electrolyte corrosion (resistant to lithium salts, organic solvents like EC/DMC/DEC, etc.), Ultra-high hardness (HV >1200) and excellent wear resistance (withstands abrasion from active material particles in slurries), Extremely low metal ion leaching (ensures electrolyte purity, prevents battery self-discharge), Excellent mechanical strength and fracture toughness (withstanding frequent on-off impacts), Low friction coefficient (enables smooth operation and long-lasting seals), Superior electrical insulation (prevents electrochemical corrosion), Capable of achieving nano-level ultra-smooth surfaces (Ra < 0.01 µm) to reduce adhesion and friction.
Application Fields:
Precise quantitative transfer and shut-off control of lithium battery electrode slurries (cathode/anode), Accurate filling and dispensing valves for electrolytes, Slurry switching and regulating valves on mixing and coating machines, Powder material transfer control valves in dry electrode manufacturing, Vacuum and sealing valves after electrolyte filling.
Application Industries:
New Energy (Lithium battery manufacturing equipment), Fluid Control (High-precision, high-cleanliness process control), Advanced Mechanical Equipment.
Processing Difficulties:
Achieving nano-level fitting accuracy and super-mirror sealing surfaces between the valve core and seat to ensure ultra-low leakage rates; Machining complex micron-level internal flow channels for precise control of minute flow rates; Achieving ultra-smooth surfaces with Ra < 0.01µm while maintaining high toughness and completely eliminating surface defects; The material must possess extremely high chemical purity and consistency, absolutely preventing the introduction of any impurities (e.g., Fe, Na, K) that could cause battery performance degradation; Ensuring the valve's dimensional and surface integrity remain unchanged after long-term exposure to highly corrosive and abrasive slurries.
Processing Flow:
Inspection and selection of medical/electronic grade high-purity zirconia powder → Complex valve component forming via精密 Ceramic Injection Molding (CIM) → Catalytic debinding and low-temperature presintering → High-temperature atmosphere sintering for densification → Precision CNC grinding for initial shaping → Ultra-precision CNC grinding of core mating surfaces → Ultrasonic-assisted machining of internal micro flow channels → Multi-step diamond paste polishing and Chemical Mechanical Polishing (CMP) to achieve mirror finish → 100% helium mass spectrometer leak testing and flow coefficient (Cv) testing → Cleanliness testing (particulates, ion leaching) → Pairing selection and functional testing → Vacuum packaging in a class 1000 cleanroom
Delivery Period:
Standard metering valve components: 60-90 days
High-precision, custom valves with special flow channels or certification requirements (e.g., cleanliness report): 100-160 days
The Lithium Battery Filling Equipment Zirconia Ceramic Metering/Shut-off Valve is a core precision fluid component that ensures the consistency, safety, and high performance of lithium battery manufacturing. In critical processes such as slurry preparation, coating, and electrolyte filling, there are近乎苛刻 requirements for precise metering of transferred media, absolute sealing, and the elimination of any form of contamination. Traditional metal valves fail to meet these needs due to their susceptibility to corrosion, wear, and the risk of causing metal ion contamination. Valves manufactured from high-performance Y-TZP zirconia ceramics, leveraging their inherent purity, wear and corrosion resistance, and potential for ultra-precision machining, have become a key element in enabling the intelligent manufacturing upgrade of lithium batteries.
Key Features:
Eliminates Metal Contamination, Ensuring Intrinsic Battery Safety and High Consistency – Zirconia ceramic is a completely inorganic, non-metallic insulating material, fundamentally eliminating the risk of introducing harmful metal ions (e.g., Fe, Cu) into the electrolyte or slurry due to valve wear or corrosion. This is crucial for preventing internal micro-shorts, reducing self-discharge rates, and improving cycle life, forming the prerequisite for producing high-performance power and energy storage batteries.
Extraordinary Durability, Meeting Challenges of High Wear and Strong Corrosion – Electrode slurries contain a high volume of hard inorganic active material particles, causing severe erosive wear on valves. The hardness of zirconia is second only to diamond and silicon carbide, and its extremely low wear rate ensures stable flow accuracy even after millions of cycles. Simultaneously, its outstanding chemical inertness towards various lithium salts and organic solvents guarantees long-term service reliability in highly corrosive electrolyte environments.
Nano-level Sealing and Precise Flow Control – Through ultra-precision machining technology, the mating surfaces of the valve core and seat can achieve nano-level flatness and smoothness, enabling true "zero-leakage" soft seals or metal hard seals with ultra-low leakage rates. This卓越的 sealing performance not only prevents waste and contamination from slurry or electrolyte leakage but also ensures highly accurate volume for each filling or metering cycle, directly improving battery cell consistency (Capacity Variance) and yield rate.
