Reliability Test

Why Choose CMB for Reliability Test ?

At CMB, we provide exclusive, insightful, and highly efficient reliability testing—customized for your battery pack and reserved solely for our partners.

Exclusive Partnership
Your project receives our undivided attention. From the initial concept phase, a dedicated engineering lead is assigned to deeply understand your battery system, ensuring every test protocol is meticulously aligned with your specific performance and safety goals. Our resources are reserved solely for our partners, guaranteeing priority access and focused collaboration.

From Data to Actionable Insights
We move beyond delivering standardized pass/fail reports. Our experts work alongside your team to interpret critical findings, transforming complex data into clear, actionable recommendations. We focus on enhancing the quality, safety, and performance of your total battery solution.

Engineered for Your Efficiency
We respect your timeline. Our deep foundational understanding of your project eliminates the need for repetitive clarifications. This allows us to proceed directly to precise, effective testing, accelerating your development cycle without compromising on depth or rigor.

Custom-Tailored Testing Scope
We believe your validation program should be as unique as your application. We collaborate with you to define and customize the exact testing parameters, conditions, and standards your battery pack requires, ensuring every test is perfectly targeted to your real-world use case and compliance landscape.

CM Batteries’ Reliability Test Framework

Our comprehensive reliability validation framework is built on four interdependent pillars: Safety, Performance & Lifecycle, Environmental Robustness, and Systems Intelligence.

1. Safety Validation

Safety is the cornerstone of our testing philosophy, addressing electrical, mechanical, and environmental hazards.

•Electrical Safety: Validation of BMS protection boundaries and reliability through Overcharge/Over-discharge Tests, Internal & External Short Circuit Tests, and Dielectric Withstanding Voltage & Insulation Resistance Tests.
•Mechanical Safety: Evaluation of structural integrity under abuse conditions via Crush/Impact Tests (simulating collisions), Drop Tests (for handling and transportation), and Vibration Tests (simulating operational or transport stress profiles).
•Environmental Safety: Assessment of stability under thermal stress through Thermal Abuse Tests (e.g., storage at 150°C) and Temperature Cycling Tests, which stress seal integrity and connections through rapid thermal expansion and contraction.

2. Electrical Performance & Lifecycle Endurance

These tests validate core functionality and long-term value, answering “how well does it perform and for how long?”

•Basic Characterization: Capacity & Energy Verification and DC/AC Internal Resistance (DCR/ACR) Measurement.
•Cycle Life Validation: Battery packs undergo repeated charge/discharge cycles (e.g., at 1C/1C) until capacity degrades to a defined threshold (e.g., 80%). We record the full capacity degradation curve and total cycle count. Protocols are tailored for specific applications like fast-charging or high-rate discharge.
•Rate Capability Analysis: Performance, temperature rise, and efficiency are evaluated under various charge (e.g., 0.5C, 1C, 2C) and discharge rate conditions.
•Storage & Self-Discharge: Self-Discharge Rate Measurement (capacity loss after 28 days at full charge) indicates manufacturing consistency. Storage Life Testing evaluates capacity recovery after long-term storage under defined SOC and temperature conditions.

3. Environmental & Robustness Testing

We verify that your battery pack will perform reliably in its intended operating world.

•High & Low Temperature Operation: Performance retention is tested at the extremes of the specified operating range (e.g., -20°C to 55°C). For specialized packs, we can validate at even more extreme custom temperatures.
•Low-Temperature Charging: A critical test to verify the absence of lithium plating during charging in cold environments.
•Ingress Protection (IP Rating): Validation against dust and moisture ingress per standards like IP67 / IP68.
•Corrosion Resistance: Salt Spray Testing validates the resistance of housings and connectors to corrosive environments (e.g., coastal, industrial).

4. BMS & Functional Intelligence

•BMS Protection Verification: Rigorous testing of threshold accuracy and response times for all critical protections: Overvoltage, Undervoltage, Overcurrent, Short Circuit, Overtemperature, and Undertemperature.
•SOC/SOH Estimation Accuracy: Validation of the BMS’s algorithmic accuracy in estimating State of Charge and State of Health under complex, real-world operating conditions.
•Communication & Diagnostics: Stability and reliability testing of communication protocols (e.g., CAN, RS485), including bit error rate analysis under stress.

A full reliability qualification program is a significant undertaking, requiring careful planning, dedicated sample quantities (often dozens to hundreds of units), and time—especially for lifecycle testing, which can span several months.