Yuelian YL-A-225E Programmable Environmental Test Chamber for Battery Thermal Cycling

Overview

The Yuelian YL-A-225E Programmable Environmental Test Chamber is an engineered solution for accelerated thermal and humidity stress testing of lithium-ion batteries and battery modules in accordance with international safety validation protocols—including GB/T 31485–2015, IEC 62133, UN 38.3, and ISO 12405. Designed specifically for battery qualification laboratories, this chamber implements precise, repeatable temperature cycling profiles under controlled ambient conditions using a dual-stage refrigeration system and PID-driven humidity control (where applicable). Its core measurement architecture relies on high-stability PT100 sensors mounted at multiple spatial locations within the working chamber, enabling real-time monitoring of thermal gradients and compliance verification against uniformity and deviation specifications defined in ASTM E2297 and IEC 60068-3-5. The chamber operates across a full range of -50°C to +150°C, supporting both rapid ramping (1°C/min average rate) and extended dwell phases required for thermal shock simulation, low-temperature storage validation, and high-temperature operational endurance assessment.

Key Features

• Monolithic structural design with reinforced outer casing (thickened cold-rolled steel, gray-blue electrostatic powder coating) and corrosion-resistant 304 stainless steel inner chamber
• Dual-layer tempered safety observation window (350 × 400 mm) with anti-fog heating film and integrated LED lighting for continuous visual monitoring during test cycles
• Precision temperature control via 7-inch color TFT LCD touchscreen interface with programmable multi-segment cycle logic (up to 999 segments per program)
• High-efficiency Tecumseh hermetic scroll compressor paired with copper-aluminum finned evaporator and microchannel condenser for stable long-term operation
• Compliance-ready hardware architecture: RS232 and RS485 serial interfaces support integration with SCADA systems and external data loggers for audit-trail generation
• Pre-configured test templates aligned with GB/T 31485–2015 Table 1 temperature/time profiles—enabling direct execution of 5-cycle thermal cycling tests with automatic dwell timing and ramp sequencing

Sample Compatibility & Compliance

The YL-A-225E accommodates single-cell pouch/prismatic/cylindrical Li-ion batteries (up to 20 kg total load), battery modules (e.g., EV traction packs up to 800 mm × 1000 mm footprint), and auxiliary components such as BMS housings and thermal interface materials. Chamber internal dimensions (W50 × H75 × D60 cm) allow unobstructed airflow around samples while maintaining ISO 12405-2 specified air velocity constraints (<0.5 m/s at sample surface). All thermal cycling procedures conform to GLP-aligned documentation requirements, including timestamped temperature logs, operator ID tagging, and programmable alarm thresholds for out-of-spec deviations. The system supports traceability under FDA 21 CFR Part 11 when connected to validated third-party software platforms with electronic signature capability.

Software & Data Management

The embedded controller firmware records all thermal parameters—including chamber setpoint, actual chamber temperature, sensor-specific readings, compressor status, and cycle progression—at user-defined intervals (default: 10 s). Raw data exports in CSV format via USB port or RS232/485 link, compatible with MATLAB, Python Pandas, and LabVIEW for post-test statistical analysis (e.g., ΔT distribution mapping, ramp linearity regression, dwell stability quantification). Optional Ethernet-enabled remote monitoring enables secure web-based access to live chamber status, historical trend charts, and alarm history—fully compliant with IT network security policies in regulated R&D environments.

Applications

• Thermal cycling validation of battery cells per GB/T 31485–2015 Clause 6.2.2 and UN 38.3 Section 38.3.4
• Low-temperature discharge performance evaluation at -40°C under controlled humidity conditions
• High-temperature aging studies simulating long-term storage at +85°C/85% RH (with optional humidification module)
• BMS thermal management system co-testing with active cooling/heating loops
• Material compatibility screening of encapsulants, adhesives, and busbar coatings under cyclic thermal stress
• Pre-certification testing for UL 2580, ISO 12405-4, and AEC-Q200-003 qualification programs

FAQ

What standards does the YL-A-225E support out-of-the-box?

It includes preloaded test sequences for GB/T 31485–2015, IEC 62133-2, and UN 38.3 thermal cycling requirements, with adjustable ramp rates and dwell times.
Can the chamber be validated for IQ/OQ/PQ protocols?

Yes—the unit ships with a factory calibration certificate (NIST-traceable PT100 sensors), and its mechanical and control architecture meets ISO/IEC 17025 prerequisites for in-house qualification.
Is remote monitoring and data export compliant with 21 CFR Part 11?

The base controller supports audit trail generation; full Part 11 compliance requires integration with validated third-party software (e.g., DeltaV, Siemens Desigo CC) that provides electronic signatures and role-based access control.
What is the maximum sample weight and dimensional envelope supported?

Rated for 20 kg total load; maximum sample footprint is 480 mm × 680 mm (allowing 20 mm clearance from walls and 100 mm above sample for laminar airflow).
Does the system include humidity control?

The YL-A-225E is configured as a temperature-only chamber; optional humidification subsystems (0–98% RH, ±2% RH accuracy) are available as YL-A-225EH variants.