Jianhu JH-BT-RTS Series High-Speed Thermal Cycling Chamber for EV Battery Testing

Overview

The Jianhu JH-BT-RTS Series High-Speed Thermal Cycling Chamber is an engineered environmental test system specifically designed for rigorous thermal stress validation of lithium-ion batteries, battery modules, and energy storage systems used in electric vehicles (EVs), aerospace, and grid-scale applications. It operates on a dual-refrigerant cascade compression cycle architecture coupled with high-power resistive heating elements and precision PID+ fuzzy logic control algorithms to achieve rapid, repeatable, and traceable temperature transitions. Unlike conventional thermal chambers optimized for steady-state conditioning, the JH-BT-RTS series prioritizes dynamic performance—enabling programmable multi-segment thermal profiles with linear or non-linear ramping, dwell, and step functions per IEC 62660-2, UN38.3, GB/T 31485, and ISO 12405-3 test protocols. Its explosion-proof enclosure (certified to Class I, Division 1, Group D per NEC 500 and ATEX/IECEx standards) integrates intrinsically safe monitoring circuits, pressure-relief vents, and spark-resistant internal components—ensuring safe operation during high-risk battery abuse testing under thermal runaway conditions.

Key Features

• High-speed thermal cycling capability: Achieves ≤45 min cooling (–40 °C → +85 °C) and ≤60 min heating (–40 °C → +85 °C) under no-load conditions, validated per ASTM E1545-19 Annex A1 methodology.
• Multi-segment programmable controller: 32-bit ARM-based PLC with 10.1″ capacitive touchscreen interface; supports up to 999 segments, 99 cycles, and nested loops with user-defined ramp rates, dwell times, and conditional branching.
• Explosion-proof construction: Stainless steel 304 chamber interior; reinforced double-wall insulated housing with 150 mm polyurethane foam (λ = 0.022 W/m·K); certified Ex d IIB T4 Gb and Ex tb IIIC T135°C Db per IEC 60079-0/-1/-7/-31.
• Precision thermal regulation: Dual Pt100 Class A sensors (ISO 60751) per chamber zone; real-time deviation compensation algorithm ensures ±0.5 °C temporal stability and ±2.0 °C spatial uniformity (9-point mapping per IEC 60068-3-5).
• Robust refrigeration architecture: Twin-cascade compressor system (Embraco or Bitzer optional) with electronic expansion valves, oil management, and hot-gas bypass—designed for >20,000 hr MTBF under continuous cycling duty.

Sample Compatibility & Compliance

The JH-BT-RTS accommodates battery cells (pouch, prismatic, cylindrical), modules (up to 1.2 m × 0.8 m × 0.6 m), and small packs with integrated thermocouple access ports and gas venting interfaces. Internal chamber volume options range from 150 L to 1000 L. All configurations comply with GLP/GMP data integrity requirements: audit trail logging (user ID, timestamp, parameter change), electronic signature support, and 21 CFR Part 11–ready firmware (optional). Test execution aligns with mandatory clauses of UN Manual of Tests and Criteria Part III, Section 38.3 (thermal test T1–T5), SAE J2464, and GB/T 31467.3. Calibration certificates are NIST-traceable and include as-found/as-left data per ISO/IEC 17025 accredited procedures.

Software & Data Management

Jianhu’s proprietary TestMaster™ v4.2 software (Windows 10/11 compatible) provides full remote supervision via Ethernet or RS485 Modbus TCP. It enables real-time visualization of chamber setpoints, actual temperatures, compressor status, and safety interlock states. Data is logged at 1 Hz resolution with automatic CSV export, configurable alarm thresholds, and pass/fail flagging against preloaded test standards. The system supports integration into MES/QMS platforms through OPC UA or RESTful API endpoints. All raw data files are SHA-256 hashed and time-stamped, satisfying ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) for regulatory submissions.

Applications

• Accelerated life-cycle validation of EV traction batteries under repeated low-temperature charging and high-temperature discharging regimes.
• Thermal shock screening of battery management system (BMS) electronics and cell interconnects.
• Pre-conditioning of battery samples prior to mechanical abuse testing (crush, nail penetration, overcharge).
• Development and verification of thermal runaway propagation mitigation strategies (e.g., phase-change material integration, fire barrier efficacy).
• Environmental qualification of battery enclosures, cooling plates, and gasket materials per MIL-STD-810H Method 502.7.

FAQ

What safety certifications does the JH-BT-RTS hold for battery testing?

It carries ATEX Directive 2014/34/EU (II 2G Ex d IIB T4 Gb), IECEx CoC (Ex d IIB T4 Gb), and CNEx certification (Ex d IIB T4 Gb), along with CE marking under Machinery and EMC directives.
Can the chamber be integrated into an automated test cell with robotic handling?

Yes—equipped with dry-contact I/O, Modbus RTU/TCP, and Ethernet/IP interfaces; supports hardware handshaking for synchronized door actuation, power cutoff, and emergency stop coordination.
Is temperature calibration performed before shipment?

Each unit undergoes full 9-point temperature mapping at three setpoints (–40 °C, 25 °C, +85 °C) using accredited reference standards; calibration report and uncertainty budget are provided.
What maintenance intervals are recommended for sustained performance?

Compressor oil and filter replacement every 6,000 operating hours; annual verification of sensor drift and control loop tuning; biannual inspection of explosion-proof seals and grounding continuity per IEC 60079-17.
Does the system support custom test profile import (e.g., from MATLAB or Python)?

Yes—TestMaster™ accepts CSV-formatted time-series profiles with column headers “Time(s), Setpoint(°C), RampRate(°C/min)” for direct upload and execution.