Yuelian YL-DL-5000A Battery Pack Short-Circuit Test System

Overview

The Yuelian YL-DL-5000A Battery Pack Short-Circuit Test System is an engineered safety validation platform designed for rigorous compliance testing of high-voltage, high-energy battery systems—particularly those deployed in electric vehicles (EVs), energy storage systems (ESS), and industrial traction applications. It implements controlled, high-magnitude direct-current short-circuit conditions in accordance with internationally recognized safety standards including UN GTR No. 20, ISO 12405-4, GB/T 31467.3, and SAE J2464. The system subjects the full battery pack—including its battery management system (BMS), thermal management interfaces, and mechanical enclosure—to a defined low-impedance fault condition (≤5 mΩ intrinsic resistance, configurable to ≤20 mΩ) for a standardized duration of 10 minutes. Post-test observation continues for 2 hours to evaluate delayed failure modes such as thermal runaway propagation, electrolyte leakage, structural deformation, or combustion events. Critical pass/fail criteria include functional activation of internal protection circuits, maintenance of electrical insulation resistance ≥100 Ω/V (measured post-test at rated voltage), and absence of fire, explosion, or hazardous gas release.

Key Features

• Vacuum-arc interrupter and high-current DC contactor architecture ensures stable, repeatable short-circuit initiation with minimal arcing degradation and <5 mΩ total loop resistance—critical for accurate fault current reproduction and long-term calibration stability.
• Integrated explosion-resistant chamber (W1000 × H1000 × D1000 mm) constructed from thickened stainless steel interior and reinforced cold-rolled steel exterior, finished with corrosion-resistant powder coating.
• Dual-layer tempered observation window (350 × 400 mm) enables real-time visual monitoring without compromising containment integrity; certified to withstand transient overpressures up to 1.2 MPa.
• Five-channel synchronized data acquisition system captures current, voltage, and up to three independent thermocouple inputs at ≥30 Hz sampling rate, supporting time-synchronized analysis of electrothermal coupling behavior.
• Automated pressure-relief mechanism activates within milliseconds upon internal overpressure detection, routing vented gases through a dedicated exhaust ducting path equipped with flame arrestors and particulate filters.
• PC-based control software provides real-time overlay of I-V-T-t curves, programmable test sequences, audit-trail logging, and export-compliant reporting (CSV/Excel) aligned with GLP documentation requirements.

Sample Compatibility & Compliance

The YL-DL-5000A accommodates battery packs up to 1.5 m in length and 800 kg in mass, with flexible terminal interface options (busbar clamps, stud adapters, and insulated high-current cables). It supports both liquid-cooled and air-cooled modules and maintains full operational compatibility with active BMS communication protocols (CAN 2.0B, ISO 11898-2) during test execution. The system conforms to electromagnetic compatibility (EMC) requirements per EN 61326-1 and safety construction guidelines under IEC 61010-1. All electrical isolation barriers meet ≥2 kV AC dielectric withstand rating, and grounding continuity complies with IEC 60204-1. For regulatory submissions, test reports generated by this platform are structured to satisfy traceability mandates under ISO/IEC 17025 and FDA 21 CFR Part 11 when paired with validated software configuration and user access controls.

Software & Data Management

The embedded control suite operates on a Windows-based industrial PC with deterministic real-time scheduling. It records timestamped raw sensor data with hardware-enforced synchronization across all five analog input channels. Each test session generates a unique identifier linked to operator credentials, environmental logs (ambient temperature/humidity), and pre-test verification checks (open-circuit voltage, insulation resistance baseline). Data export supports batch processing and integrates with LIMS via configurable RESTful API endpoints. Audit trails capture every parameter change, manual override event, and emergency stop activation—with immutable timestamps and digital signature support. Optional 21 CFR Part 11 compliance packages include electronic signatures, role-based access tiers, and automatic backup to network-attached storage (NAS) with SHA-256 checksum validation.

Applications

• Validation of BMS short-circuit response latency and fuse coordination logic under worst-case fault currents.
• Thermal runaway propagation studies across module-to-module and cell-to-cell boundaries in prismatic, pouch, and cylindrical configurations.
• Verification of mechanical enclosure integrity and venting design efficacy under rapid gas expansion scenarios.
• Development-stage safety margin assessment for novel chemistries (e.g., NMC 811, LFP, solid-state prototypes).
• Third-party certification testing for UL 2580, GB 38031, and ECE R100 homologation programs.
• Root-cause analysis of field return incidents involving uncontrolled energy discharge events.

FAQ

What standards does the YL-DL-5000A directly support?
It is configured to execute test sequences compliant with UN GTR No. 20 Annex 5, ISO 12405-4 Clause 7.3, GB/T 31467.3 Section 7.1.3, and SAE J2464 Appendix A.
Can the system be upgraded to higher current ratings?
Yes—the platform architecture supports modular upgrades to YL-DL-10000A or YL-DL-15000A configurations via replacement of the contactor assembly, busbar infrastructure, and current shunt calibration, subject to chamber thermal derating review.
Is remote operation and monitoring supported?
Standard Ethernet connectivity enables secure remote desktop access and live telemetry streaming via TLS-encrypted WebSocket; optional 4G/LTE gateway integration is available for off-site deployment.
How is calibration traceability maintained?
All current/voltage/temperature sensors ship with NIST-traceable calibration certificates; annual recalibration services include uncertainty budget documentation per ISO/IEC 17025.
Does the system include fire suppression capability?
A dry chemical (ABC) or aerosol-based suppression module can be factory-integrated as an optional subsystem, activated automatically upon dual-sensor confirmation of flame or rapid temperature rise (>100 °C/s).