Yuelian YLB-EP125 Battery Explosion-Proof Test Chamber

Overview

The Yuelian YLB-EP125 Battery Explosion-Proof Test Chamber is an engineered safety containment system designed for controlled electrochemical stress testing of lithium-ion, nickel-metal hydride, and other rechargeable battery cells and modules. It operates on the principle of physical isolation and passive/active pressure management to mitigate hazards associated with thermal runaway—specifically gas generation, flame ejection, and projectile release during overcharge, overdischarge, short-circuit, or external heating tests. Unlike general-purpose environmental chambers, the YLB-EP125 integrates structural reinforcement, explosion-relief architecture, and fail-safe ventilation logic to meet stringent national safety standards for battery R&D laboratories, quality assurance departments, and third-party certification facilities. Its modular single-layer configuration supports scalable deployment in multi-station test benches, while its customizable internal volume accommodates diverse cell form factors—from cylindrical 18650s to prismatic and pouch-type modules.

Key Features

• Robust dual-layer door assembly with stainless-steel inner leaf and high-compression silicone gasket ensures gas-tight integrity under transient overpressure conditions.
• PTFE-laminated interior lining provides Class V-0 flame resistance (per UL 94), dielectric insulation (>10¹² Ω·cm), and resistance to electrolyte corrosion—including LiPF₆-based organic solvents.
• Dedicated Ø50 mm feedthrough port on each chamber’s right wall enables secure, strain-relieved routing of voltage/current probes, thermocouples, and gas sampling lines without compromising containment.
• Automated exhaust response: integrated smoke sensor triggers a high-flow centrifugal fan (≥300 m³/h) within <2 seconds of particulate detection, evacuating combustion byproducts through a downward-vented duct path to minimize ceiling contamination.
• Directional pressure-relief vent with calibrated rupture disc (rated at 15–20 kPa burst pressure) channels explosive energy away from operator zones and adjacent instrumentation.
• Tempered borosilicate observation window (250 × 250 mm) offers optical clarity with impact resistance up to 3 J and thermal shock stability to 200°C.

Sample Compatibility & Compliance

The YLB-EP125 accommodates battery samples up to 480 mm in maximum dimension per axis, supporting common configurations including 18650, 21700, 26650 cylindrical cells; 10–30 Ah prismatic modules; and flexible pouch cells mounted on rigid backing plates. All structural and functional specifications align with mandatory Chinese national standards for portable battery safety evaluation, including GB 31241–2014 (Safety requirements for lithium batteries in portable electronics), GB/T 21966–2008 (Test methods for thermal stability of lithium batteries), and MT/T 1051–2007 (Explosion-proof requirements for mine-use battery equipment). While not certified to IEC 62133 or UN 38.3 out-of-the-box, the chamber’s mechanical design basis—particularly its venting geometry, material flammability rating, and pressure containment margin—is fully compatible with adaptation for international test protocols when integrated with approved data acquisition and trigger logic systems.

Software & Data Management

The YLB-EP125 operates as a hardware safety envelope rather than a closed-loop automated instrument; therefore, it does not include embedded firmware or proprietary software. Instead, it interfaces seamlessly with industry-standard battery cyclers (e.g., Neware, Arbin, Bitrode), thermal imaging systems, and gas chromatography–mass spectrometry (GC-MS) analyzers via standardized analog/digital I/O (0–10 V, 4–20 mA, dry contact relay outputs). Optional integration with LabVIEW™ or Python-based control frameworks enables synchronized logging of chamber status (light on/off, fan activation timestamp, vent actuation flag) alongside electrical and thermal test data—supporting full traceability required under GLP and ISO/IEC 17025-accredited laboratory practices. Audit trails for safety-critical events (e.g., smoke detection, vent opening) are recordable with time-stamped metadata compliant with FDA 21 CFR Part 11 when paired with validated electronic lab notebook (ELN) platforms.

Applications

• Thermal runaway propagation studies in multi-cell battery packs under controlled fault initiation.
• Overcharge/overdischarge validation per GB/T 18287–2013 and YD/T 2366.1–2011 for consumer electronics OEMs.
• Gas evolution analysis during accelerated life testing, where evolved CO, CO₂, H₂, and HF are sampled via the Ø50 mm port into FTIR or GC-MS systems.
• Safety qualification of solid-state battery prototypes exhibiting novel dendrite suppression chemistries.
• Internal short-circuit simulation using nail penetration fixtures mounted externally with feedthrough alignment.
• Pre-certification screening for UL 1642, UL 2580, and GB 38031–2020 prior to formal third-party submission.

FAQ

Does the YLB-EP125 include built-in temperature control or humidity regulation?

No. It is a passive containment enclosure—not an environmental chamber. Temperature conditioning must be achieved externally via heated/cooled air supply ducted through the Ø50 mm port or auxiliary HVAC interface.
Can multiple layers be stacked vertically to form a multi-tier test rack?

Yes. The base frame and mounting interface support vertical stacking up to three layers with independent power and signal routing. Structural load capacity is rated at 120 kg per layer.
Is the PTFE interior lining replaceable in-field?

Yes. Liner panels are mechanically fastened with non-magnetic stainless-steel clips and can be removed and reinstalled without specialized tools.
What maintenance intervals are recommended for the pressure-relief vent mechanism?

The rupture disc should be inspected visually before each test series and replaced after any activation event or at six-month intervals, whichever occurs first.
Are custom dimensions available beyond the standard 500 mm cube?

Yes. Yuelian accepts dimensional modifications up to 800 × 800 × 800 mm per chamber, subject to structural validation and revised pressure-rating certification.