Testing & Validation
The Foundation of Customized Lithium Battery Reliability
Testing and validation are the engineering foundation of customized lithium battery system safety, reliability, and compliance ó not a late-stage add-on.
LARGE conducts systematic validation at both cell and pack levels, evaluating performance under real-world and extreme conditions to ensure every customized solution withstands rigorous safety, performance, and regulatory requirements before mass production and market launch.
Core Capabilities
- Lithium Cell- and pack-level test coverage
- 109+ validation tests covering safety, environmental reliability, and electrical performance
- Test protocols aligned with global certification standards
- Pre-certification testing and design verification support
- Reduced risk of certification failure, redesign, and project delay
Why System-Level Testing Is Essential for Custom Lithium Battery Systems ?
Custom battery risks cannot be addressed by experience alone.
Custom lithium battery systems vary widely in cell selection, mechanical design, BMS strategy,
thermal management, and application environment.
Without system-level validation, critical risks are difficult to identify in advance.
Risks Without System-Level Validation
1. Unpredictable Safety Risks
Hidden safety issues may only emerge during mass production or real-world operation.
2. Performance and Lifetime Below Target
Actual capacity, discharge rate, or cycle life may deviate from design expectations.
3. High Risk of Certification Failure
Battery samples may fail repeatedly during formal certification testing.
4. Loss of Schedule and Cost Control
Repeated design changes can extend development cycles and increase cost uncertainty.
Risks Without System-Level Validation
1. Enhanced System Safety and Reliability
System limits are verified under abnormal and extreme conditions, reducing failure risks.
2. Stable, Verified Performance Over Lifetime
Key performance parameters are validated to operate consistently within design limits.
3. Higher First-Pass Certification Success Pre-certification testing minimizes failures and rework during official certification.
4. Improved Project Predictability and Delivery EfficiencyEarly risk identification helps keep development and delivery on schedule.
LARGE Testing & Validation Center
Professional Testing & Pre-Certification Capabilities for Customized Lithium Batteries
LARGE moves certification risk upstream into the R&D stage.
The in-house testing center supports test items related to IEC 62133, UL 1642, UL 2054, and UL 2271, covering both cell and battery pack levels.
Before submission to third-party certification bodies, in-house pre-testing verifies safety, performance, and structural design, enabling early risk identification and design optimization ó improving first-pass certification rates while reducing project timeline and cost.
Evaluates protection performance under abnormal charging
Verifies stability and structural safety under deep discharge
Assesses instant response and
protection behavior
Evaluates thermal runaway risk under elevated temperatures
Assesses enclosure strength and internal structural integrity
Evaluates safety under severe mechanical abuse
Verifies battery performance and safety under high- and low-temperature conditions.
Evaluates structural and performance stability under repeated temperature variations.
Simulates high-humidity environments to assess long-term operational reliability.
Verifies structural reliability under transportation and operational vibration conditions.
Evaluates safety and functional integrity under accidental drop scenarios.
Verifies protection capability against moisture and particulate exposure.
Verifies whether actual capacity and output voltage meet design specifications.
Evaluates performance degradation during long-term charge and discharge cycling.
Tests discharge capability and stability under extreme temperature conditions.
Verifies charging and discharging performance under different C-rate conditions.
Evaluates energy conversion efficiency and consistency performance.
3 + 21-Day Aging Protocol
= 3 days high-temperature aging at 55∞C
=21 days storage at room temperature.
Ensures stable and consistent performance before shipment.
Aging data provided with delivery
Dedicated validation capabilities for high-power and specialized battery system applications.
Test Design Aligned with Global Safety Certifications
LARGEís validation process is structured around major lithium battery safety and compliance standards, integrating certification considerations at the testing stage to minimize redundant testing and redesign.
Pre-validation improves certification success rates and accelerates time-to-market.