PULUODY PMT-2YC Lithium-Ion Battery Electrolyte Particulate Counter

Overview

The PULUODY PMT-2YC Lithium-Ion Battery Electrolyte Particulate Counter is a high-precision optical particle counter engineered specifically for the stringent cleanliness requirements of lithium-ion battery electrolyte manufacturing and quality assurance. It operates on the principle of dual-laser narrow-beam light scattering—where two spatially separated laser sources illuminate suspended particles in laminar-flow liquid streams, enabling simultaneous detection of scattering intensity and transit time to enhance sizing resolution and reduce misclassification at sub-micron boundaries. Unlike conventional single-laser systems, this 8th-generation sensor architecture minimizes Mie scattering interference and improves signal-to-noise ratio for transparent, low-refractive-index electrolytes such as LiPF₆ dissolved in carbonate solvents (EC/DMC/EMC). The instrument is designed for both online process monitoring and offline laboratory verification, delivering traceable, repeatable particulate data critical for controlling cathode/anode slurry homogeneity, separator pore integrity, and final cell electrochemical stability.

Key Features

• Dual-laser narrow-beam optical detection system optimized for low-conductivity, low-viscosity organic electrolytes (e.g., carbonate-based, ether-based, and solid-state hybrid formulations)
• Integrated precision piston pump and electromagnetic flow regulator ensuring volumetric sampling accuracy better than ±1% and flow stability under variable backpressure conditions
• Real-time, continuous online measurement capability with 4–20 mA analog output and configurable alarm thresholds for out-of-specification particle excursions
• Modular design supporting both fixed-installation (pipeline-integrated) and portable offline configurations—enabling rapid deployment across cleanroom zones, filling lines, and QC labs
• Calibration traceability to national and international standards including JJG 1061 (China), ISO 21501-4 (light-scattering particle counters), and NIST-certified polystyrene latex reference materials
• Robust hardware architecture rated for ISO Class 5–7 cleanroom environments, with stainless-steel wetted parts compatible with aggressive solvents and residual HF scavengers

Sample Compatibility & Compliance

The PMT-2YC is validated for use with a broad spectrum of battery-relevant liquids: lithium hexafluorophosphate (LiPF₆) solutions in ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC); lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in dioxolane (DOL); and emerging solid polymer electrolytes in solvent-swollen states. It complies with material compatibility requirements per ASTM D6978-05 (for non-aqueous fluid handling) and meets mechanical safety standards per IEC 61010-1. For regulated manufacturing environments, the V8.3 software supports 21 CFR Part 11-compliant user authentication, electronic signatures, and immutable audit trails—fully aligned with GMP documentation workflows in battery cell production facilities certified to ISO 9001 and IATF 16949.

Software & Data Management

PULUODY V8.3 is a dual-mode software platform comprising independent modules for analysis and calibration—eliminating cross-contamination of operational parameters during routine verification. The PC version enables full spectral deconvolution, size distribution histogramming (log-normal or Rosin-Rammler fitting), and batch trend analysis across multiple instruments. The iPad-compatible interface supports touch-driven real-time dashboarding, alarm log export (CSV/PDF), and remote firmware updates via secure HTTPS. All raw scatter pulse data are stored with metadata tags (timestamp, operator ID, calibration ID, environmental temperature/humidity), ensuring full traceability from measurement to report generation. Data export formats include ASTM E2457-compliant particle count files and ISO 4406-coded summary reports suitable for supplier quality portals.

Applications

• In-line monitoring of electrolyte filtration units pre-filling to detect membrane breach or adsorbent shedding
• Offline verification of electrolyte batches prior to cell assembly—ensuring compliance with internal cleanliness specifications (e.g., ≤50 particles/mL >2 µm)
• Root-cause analysis of micro-shorts in pouch cells through correlation of particulate load with post-cycling impedance rise
• Validation of cleaning efficacy for electrode coating rollers, slurry mixers, and filling nozzles using rinse solution analysis
• Supporting DOE studies on additive precipitation kinetics (e.g., LiNO₃ in Li-S electrolytes) via time-resolved particle growth tracking
• Qualification of nanocellulose or SiO₂ suspensions used in gel-type quasi-solid electrolytes

FAQ

What particle size ranges can the PMT-2YC resolve in LiPF₆/carbonate electrolytes?
The standard configuration detects particles from 0.5 µm to 20.0 µm with ISO 21501-4 compliant resolution. Custom firmware and calibration protocols extend reporting to 0.1 µm(c) (count median) and up to 100 µm for agglomerate screening.
Is the system compatible with hazardous area classifications (e.g., Class I Div 1)?
The base unit is rated for general-purpose cleanroom use (IP54 enclosure). Explosion-proof variants with ATEX/IECEx certification are available upon engineering consultation and require customized pump and housing modifications.
How does the dual-laser architecture improve accuracy over single-laser counters?
Dual-laser interrogation reduces false positives from Brownian motion artifacts and enables transit-time gating—effectively rejecting noise pulses shorter than hydrodynamic residence time, thereby improving counting fidelity below 1 µm in low-dielectric media.
Can the PMT-2YC be integrated into a SCADA or MES platform?
Yes—via Modbus TCP/IP (optional add-on module) or native 4–20 mA analog output with HART protocol support. Full OPC UA connectivity is available in V8.3 Enterprise Edition.
Does the system meet ISO 8573-4 for compressed air particulate testing?
No—this instrument is optimized for liquid-phase analysis only. Gas-phase particulate counting requires dedicated isokinetic sampling heads and pressure-compensated flow control not included in the PMT-2YC platform.