Jianhu JH-LLT Series High-Low Temperature Environmental Test Chamber for Lithium Battery and Advanced Material Testing

Overview

The Jianhu JH-LLT Series High-Low Temperature Environmental Test Chamber is an engineered solution for controlled thermal stress evaluation of lithium-ion batteries, solid-state electrolytes, cathode/anode materials, and next-generation functional composites under rigorously defined extreme temperature conditions. Based on forced-air convection and dual-stage cascade refrigeration architecture, the chamber delivers stable, reproducible thermal environments across a certified operational range of –70 °C to +150 °C. Unlike general-purpose climate chambers, the JH-LLT Series integrates explosion-proof mechanical design (optional ATEX Zone 1 / IECEx certification), reinforced thermal insulation, and low-inertia heating/cooling loops—specifically optimized to meet the safety-critical requirements of battery cell cycling, thermal runaway propagation studies, and material phase-transition characterization. Its core function is not ambient simulation but controlled thermal excitation: applying calibrated, repeatable temperature gradients to accelerate degradation mechanisms—including SEI layer evolution, interfacial delamination, dendrite nucleation, and polymer matrix embrittlement—while maintaining full traceability for GLP/GMP-aligned laboratory workflows.

Key Features

• Explosion-resistant chamber construction with intrinsically safe internal wiring, pressure-relief ducting, and optional gas purge interface for inert atmosphere testing (N₂ or Ar)
• Cascade refrigeration system utilizing environmentally compliant R404A/R23 mixed-refrigerant stages, enabling reliable sub-zero operation down to –70 °C without liquid nitrogen dependency
• Precision PID + fuzzy logic hybrid control algorithm ensuring ±0.5 °C short-term stability and ±2.0 °C spatial uniformity across standard 500 L–1000 L working volumes
• Programmable ramp-and-soak profiles supporting multi-segment thermal cycles (up to 99 segments per program), with independent setpoint resolution of 0.1 °C
• Integrated real-time data logging via RS485/Modbus TCP; optional Ethernet/IP and OPC UA interfaces for factory-floor integration
• Double-wall stainless steel interior with electropolished finish, removable insulated observation window, and standardized 100 mm cable/port access sleeves

Sample Compatibility & Compliance

The JH-LLT Series accommodates cylindrical (18650, 21700), prismatic, pouch, and coin-cell battery formats—up to 300 mm × 300 mm × 150 mm—within its insulated workspace. Optional internal load racks, thermal interface pads, and integrated thermocouple feedthroughs (K-type, T-type) enable direct in-chamber monitoring of surface and core temperatures during dynamic thermal profiling. The system supports compliance-driven test execution per UN 38.3 Thermal Test (T.1–T.4), IEC 62133-2 Clause 8 (thermal abuse), ISO 16750-4 Section 4.2 (temperature cycling), and GB/T 31485–2015 for electric vehicle battery qualification. All control firmware includes audit trail functionality meeting FDA 21 CFR Part 11 requirements when paired with validated electronic signature modules.

Software & Data Management

Jianhu’s proprietary JH-EnviroControl software (v4.2+) provides intuitive graphical programming of thermal profiles, real-time visualization of chamber and sample thermocouple channels, and automated report generation in PDF/CSV/XLSX formats. Raw time-series data is timestamped with microsecond precision and stored locally on an industrial-grade SSD with RAID 1 redundancy. The software enforces user role-based access control (administrator, operator, reviewer), supports electronic signatures for test initiation and approval, and exports metadata-compliant files compatible with LIMS platforms such as LabVantage and Thermo Fisher SampleManager. Historical calibration records, maintenance logs, and deviation reports are retained for ≥15 years—fully aligned with ISO/IEC 17025 documentation retention mandates.

Applications

• Lithium battery safety validation: thermal runaway onset temperature mapping, post-abuse vent gas analysis pre-conditioning, and nail penetration test thermal preconditioning
• Advanced material development: glass transition (T_g) determination of polymer binders, low-temperature conductivity screening of solid electrolytes, and cryogenic mechanical property correlation
• EV component qualification: power module cold-start performance, BMS sensor drift characterization, and connector contact resistance vs. thermal cycling
• Academic research: in-situ XRD/XPS sample pre-annealing, cryo-EM specimen stabilization, and quantum dot thermal quenching studies
• Standards-compliant testing: execution of IEC 62660-2, UL 1642, and SAE J2464 thermal cycling sequences with full parameter traceability

FAQ

What safety certifications does the explosion-proof configuration meet?
The optional explosion-proof variant complies with IEC 60079-0 (general requirements) and IEC 60079-1 (flameproof enclosure “d” protection), with third-party verification available per ATEX 2014/34/EU Annex II for Group II (non-mining) applications.
Can the chamber be integrated into an automated battery testing line?
Yes—standard Modbus TCP and optional EtherCAT interfaces enable seamless synchronization with cycler systems (e.g., Arbin, BioLogic) and MES platforms via PLC-level handshaking signals (start/stop/pause/error status).
Is remote monitoring and alarm notification supported?
Built-in web server allows secure HTTPS access for live chamber status, historical trends, and configurable email/SMS alerts for temperature deviation, door open events, or compressor fault conditions.
What is the recommended calibration interval and traceability standard?
Annual calibration against NIST-traceable reference probes (±0.1 °C uncertainty) is advised; Jianhu provides UKAS-accredited calibration certificates upon request, compliant with ISO/IEC 17025:2017.
Does the system support custom thermal profiles required by proprietary R&D protocols?
Yes—JH-EnviroControl accepts user-defined CSV-based profile imports with unlimited segment depth, dwell time granularity of 1 second, and programmable rate limits per ramp phase.