Yuelian YL-DJY-10T Servo-Controlled Battery Pack Crush Test System

Overview

The Yuelian YL-DJY-10T Servo-Controlled Battery Pack Crush Test System is an engineered mechanical testing platform designed specifically for evaluating the structural integrity and safety response of electric vehicle (EV) traction battery packs and high-voltage energy storage systems under controlled quasi-static compressive loading. It operates on a servo-motor-driven hydraulic actuation principle, delivering precise, repeatable force application in accordance with internationally recognized safety standards—including ISO 12405-3 (Electrically propelled road vehicles — Test specification for lithium-ion traction batteries), GB/T 31467.3 (Chinese national standard for electric vehicle battery system safety requirements), UN Regulation No. GTR 20 (Global Technical Regulation on EV battery safety), and SAE J2464 (Recommended practice for electric vehicle battery safety). The system applies uniaxial compressive load via a rigid semi-cylindrical platen (75 mm radius, length > specimen height but ≤1 m) to simulate mechanical intrusion events such as side-impact or underbody deformation during crash scenarios. Load is applied along orthogonal axes—X (longitudinal, vehicle forward direction) and Y (lateral)—to replicate real-world directional threats. Testing concludes when either 200 kN peak force is reached or 30% geometric deformation occurs in the compression direction, followed by a mandatory 10-minute dwell period and 1-hour post-test observation window for thermal runaway detection.

Key Features

• Servo-motor-driven precision actuation ensures high repeatability, low hysteresis, and programmable speed control from 1–10 mm/s with ±0.5% force accuracy and 0.01 mm displacement resolution.
• Dual-axis test capability (X/Y) enables compliance with multi-directional crush protocols required by UN GTR 20 and GB/T 31467.3.
• Modular platen configuration includes two interchangeable semi-cylindrical compression fixtures (75 mm radius), each mounted on linear guides for smooth, low-friction motion and alignment stability.
• Integrated dual-sensor data acquisition: simultaneous measurement of compressive force (0–100 kN), displacement (0–500 mm), surface temperature (0–600 °C, ±1 °C), and cell/module voltage (0–100 V, ±0.1% FS) at ≥30 samples per second.
• Reinforced safety enclosure constructed from thick-gauge cold-rolled steel (gray/blue epoxy finish) and double-layer laminated tempered glass viewing window (350 × 400 mm) rated for pressure containment and thermal shock resistance.
• LED-lit test chamber with HD real-time video monitoring supports remote observation and synchronized event logging during thermal runaway evaluation.

Sample Compatibility & Compliance

The YL-DJY-10T accommodates battery pack specimens up to 500 mm (W) × 500 mm (D) × variable height, with optional extended configurations available for larger modules (YL-DJY-20T/50T variants support up to 2800 × 2000 mm footprints). Its rigid frame architecture and calibrated load train meet metrological traceability requirements for accredited laboratory use. All operational parameters—including force ramp rate, dwell timing, and termination logic—are programmable to satisfy test sequence definitions in ISO 12405-3 Annex D, UN GTR 20 Annex 5, and SAE J2464 Section 5. The system’s data integrity framework supports audit-ready reporting compliant with GLP and GMP principles; raw time-series datasets include embedded timestamps, sensor calibration IDs, and operator authentication logs—facilitating FDA 21 CFR Part 11–aligned electronic record management when integrated with validated LIMS environments.

Software & Data Management

The proprietary Yuelian TestMaster™ control software provides a deterministic real-time operating environment for test sequencing, closed-loop PID regulation, and synchronized multi-channel data capture. Users define test profiles via intuitive graphical workflow editors—specifying axis selection, target force/deformation thresholds, dwell duration, and pass/fail criteria. During execution, the interface displays live overlay plots of force vs. displacement, voltage decay curves, and thermal gradient maps. Post-test analysis tools include automatic peak detection, deformation rate calculation, energy absorption integral computation, and comparative curve superposition across multiple specimens. Export formats include CSV (for MATLAB/Python post-processing), PDF test reports with digital signatures, and XML-based metadata packages compatible with enterprise quality management systems (QMS). Optional API integration enables automated report generation and data ingestion into cloud-based battery analytics platforms.

Applications

This system serves as a core qualification tool for OEMs, Tier-1 suppliers, and independent certification laboratories performing type approval testing on EV battery systems. Typical use cases include: pre-certification validation against regulatory crush mandates; design verification of battery enclosure stiffness and internal cell spacing; evaluation of thermal barrier effectiveness under mechanical stress; root-cause analysis of venting behavior and propagation kinetics during crush-induced failure; and comparative benchmarking of novel cell-to-pack (CTP) architectures versus traditional module-based layouts. It is also employed in academic research investigating mechanical-electrochemical coupling phenomena—such as stress-induced SEI fracture, lithium plating acceleration, and localized current density redistribution under constrained deformation.

FAQ

What safety standards does the YL-DJY-10T directly support?
It is configured to execute test sequences defined in ISO 12405-3, GB/T 31467.3, UN GTR No. 20, and SAE J2464—with software templates preloaded for each standard’s crush protocol.
Can the system measure voltage and temperature simultaneously during crushing?
Yes. It integrates isolated 4-channel voltage inputs (0–100 V, 16-bit resolution) and 8-channel thermocouple inputs (Type K, 0–600 °C) with synchronized sampling at ≥30 Hz.
Is the control software compliant with FDA 21 CFR Part 11 requirements?
Out-of-the-box functionality meets foundational ALCOA+ principles; full Part 11 compliance requires on-site validation of electronic signatures, audit trails, and role-based access controls—services available through Yuelian’s certified validation partners.
What is the maximum allowable specimen height for the YL-DJY-10T model?
The standard vertical stroke is 500 mm, permitting specimens up to ~450 mm in height depending on fixture clearance; custom stroke extensions are available upon request.
Does the system include calibration documentation traceable to national standards?
Each unit ships with a NIST-traceable calibration certificate covering force transducer, displacement encoder, and temperature/voltage input channels—valid for 12 months under normal operating conditions.