Yuelian YL-K5-8000E Walk-In Rapid Temperature Transition Chamber

Overview

The Yuelian YL-K5-8000E Walk-In Rapid Temperature Transition Chamber is an engineered environmental test system designed for high-fidelity thermal stress validation of electric vehicle (EV) battery packs and energy storage systems under stringent automotive and industrial standards. It operates on a dual-refrigeration cascade architecture with precision PID-controlled air circulation, enabling rapid, repeatable, and traceable transitions between extreme thermal endpoints — specifically −40 °C and +85 °C — within ≤30 minutes per transition, as required by ISO 16750-4, GB/T 31467.3, and UN ECE R100 Annex 8. The chamber’s structural integrity, thermal dynamics, and safety subsystems are calibrated for continuous operation with 100–2000 kg payload loads, supporting full-scale battery modules up to Class IV (IEC 62660-2) and traction battery systems compliant with SAE J2464.

Key Features

• Robust monolithic construction: 2.5 mm thick cold-rolled steel outer enclosure with gray epoxy powder coating; 2.0 mm SUS#304 stainless steel inner chamber for corrosion resistance and cleanroom-compatible surface maintenance
• Optimized airflow design with top-down vertical circulation and adjustable vane diffusers ensures uniform thermal distribution (≤2 °C deviation across full volume)
• Dual-stage refrigeration system integrating GEA Bitzer semi-hermetic compressors with HFC-404A/HFC-23 mixed refrigerant circuitry for stable sub-zero performance down to −50 °C
• High-resolution temperature control: 0.01 °C setpoint resolution, ±0.5 °C stability (load-dependent), and ≤±1.5 °C chamber-wide deviation per IEC 60068-3-5
• Integrated safety architecture: dual independent overtemperature cutoffs, leakage current protection, pressure-relief venting, explosion-proof lighting, and optional activated carbon smoke filtration system
• 4-layer heated anti-fog laminated observation window with tempered glass, enabling real-time visual monitoring without thermal interference

Sample Compatibility & Compliance

The YL-K5-8000E accommodates EV battery packs (up to 2000 kg gross weight) and modular energy storage units (MESUs) with dimensional envelopes up to 200 cm × 200 cm × 200 cm. Its thermal profile execution meets the mandatory cycling protocol defined in GB/T 31467.3 Clause 7.11 (temperature shock test): five complete cycles between −40 °C ±2 °C and +85 °C ±2 °C, with dwell time ≥8 hours per extreme and transition time ≤30 minutes. Post-test evaluation includes insulation resistance verification (≥100 Ω/V per rated system voltage), visual inspection for casing deformation, electrolyte leakage, or thermal runaway indicators. The system supports compliance documentation generation aligned with ISO/IEC 17025 laboratory accreditation requirements and GLP audit trails.

Software & Data Management

Equipped with a 10.1-inch color TFT touchscreen HMI running embedded Linux-based firmware, the chamber provides intuitive multi-segment program editing, real-time curve plotting, and event-triggered data logging at user-defined intervals (1–60 s). All temperature, voltage, and alarm status data are timestamped and exportable via USB or RS-232/RS-485 serial interface in CSV format. Optional Ethernet connectivity enables integration into centralized MES or LIMS platforms. Audit trail functionality complies with FDA 21 CFR Part 11 requirements when paired with validated user access controls and electronic signature modules. Calibration records, maintenance logs, and test reports are stored locally with SHA-256 hash integrity verification.

Applications

• Thermal shock qualification of lithium-ion, LFP, and solid-state battery systems per UN GTR 20, ISO 12405-4, and AEC-Q200 Rev D
• Pre-conditioning of battery modules prior to mechanical vibration, electrical cycling, or abuse testing (crush, nail penetration)
• Environmental aging studies simulating accelerated calendar life under dynamic thermal load profiles
• Validation of battery management system (BMS) thermal response algorithms during rapid ambient transients
• Support for DOE, NREL, and CATL internal reliability protocols requiring reproducible large-volume thermal excursions

FAQ

What is the maximum payload capacity for thermal shock testing?
The YL-K5-8000E is rated for continuous operation with 100–2000 kg of thermally massive battery hardware, assuming adequate airflow clearance (≥15 cm from chamber walls) and uniform mass distribution.
Can the chamber meet ASTM D3555 or IEC 60068-2-14 requirements?
Yes — its programmable ramp rates, dwell accuracy, and thermal uniformity comply with IEC 60068-2-14 Ed. 4.0 (2021) and are configurable to match ASTM D3555-95(2020) test profiles upon request.
Is remote monitoring supported out-of-the-box?
Standard RS-485 Modbus RTU protocol allows integration with third-party SCADA systems; optional Ethernet/WiFi module enables secure web-based supervision and alarm notification via SMTP/SNMP.
Does the system include calibration certification?
Each unit ships with a factory-as-built temperature mapping report (9-point sensor grid) and NIST-traceable certificate for primary chamber sensors, valid for 12 months from shipment.
Are custom temperature ranges available beyond −50 °C to +100 °C?
Yes — extended low-temperature options (−70 °C) and high-temperature variants (+150 °C) are available under YL-K5-X series customization, subject to compressor and insulation modifications.