ETAC Testing Course
Battery Reliability Evaluation
In recent years, with the spread of electric vehicles (EVs) and energy storage systems, ensuring the safety and quality of batteries, including lithium-ion batteries, has become more important than ever. Even if they look the same, chemical reactions, heat generation, expansion and contraction are constantly taking place inside the battery, and safety cannot be guaranteed based solely on performance at the design stage. Therefore, battery reliability evaluation tests are essential to verify performance and durability by reproducing actual usage and transportation environments.
Why do we need battery evaluation tests?
The performance and safety of batteries vary greatly depending on the environment in which they are used. External factors such as high temperatures, low temperatures, humidity changes, vibration, shock, overcharging, and over-discharging may cause risks such as heat generation, expansion, gas generation, and deterioration.
Therefore, it is essential to conduct reliability tests that simulate actual use environments to confirm long-term safety and stability. This allows for early detection of potential defects during the development phase and enhances product reliability and quality.
UN38.3 certification essential for international transportation
When batteries are transported internationally, they are required to pass the UN Recommendation UN38.3 test. This test is an international standard to ensure safety during air and sea transportation, and consists of the following eight items: Passing UN38.3 allows for safety certification for all air, sea, and land transportation. Conversely, untested batteries are restricted from international transportation, so it is essential to take action at the development and manufacturing stages.
| test case | Contents | Main Purpose |
|---|---|---|
| T.1 Low pressure test | Maintains for 6 hours at 11.6 kPa or less | Simulates low-pressure environment during air transportation |
| T.2 Temperature test | 10 cycles of -40°C to +72°C | Confirmation of resistance to extreme temperature changes |
| T.3 Vibration test | Performed 12 times in the 7-200 Hz range | Evaluates vibration effects during transportation |
| T.4 Impact test | 150gn (small) / 50gn (large) | Shock resistance during transportation |
| T.5 External short-circuit test | Check for abnormal heat generation during short circuit | Prevention of ignition and rupture |
| T.6 Impact/crush test | Confirmation of resistance to external pressure and deformation | Structural Strength Evaluation |
| T.7 Overcharge test | Check temperature rise during overcharging | Safety evaluation in the event of a control abnormality |
| T.8 Over-discharge test | Confirmation of reaction after over-discharge | Check electrode degradation and risk of heat generation |
Three benefits of reliability testing
1. safety
Minimizes the risk of accidents such as ignition and rupture.
2. assurance of quality and longevity
Quantify performance degradation under temperature and load variations.
3. increase the value of the corporate brand
Reliability assurance based on test data enhances the reputation of our products among customers and business partners.
ETAC's Evaluation System
ETAC has extensive experience as a manufacturer of environmental testing equipment and a testing environment capable of integrated control of charging/discharging, temperature, and vibration. Combining constant temperature and humidity chambers, temperature cycle testers, vibration testers, and charge/discharge equipment, we can perform comprehensive battery evaluations that reproduce actual running conditions and transportation environments.
Why Choose Etac?
UN38.3 compliant
One-stop international transportation testing
Diverse testing facilities
Supports large battery packs to individual cells
High reproducibility
Simultaneous control of temperature, humidity, vibration, and electrical testing
Extensive track record
Numerous experiences in joint evaluations with automakers and battery manufacturers
Supporting safety and reliability with reliable data
Battery evaluation testing is the "invisible quality assurance" that underpins product safety and reliability.
ETAC supports your company's development and mass production with reliable data by providing integrated services from transport testing to endurance testing. Please contact us as your partner for international certification and quality assurance.
Typical Tests
High Temperature Storage (HTS) is a test that evaluates the service life, performance degradation, heat resistance, and long-term reliability of products and materials in a short period of time by intentionally accelerating aging through prolonged exposure to high temperatures.
Low Temperature Storage (LTS) is a test that evaluates the service life, performance degradation, heat resistance, and long-term reliability of products and materials in a short period of time by intentionally accelerating aging through prolonged exposure to low temperatures.
High Temperature Operating (HTO) Test is conducted to accelerate the degradation of products and materials by continuously applying voltage and current while exposing them to high temperatures. It is used to detect defects and to verify reliability and durability.
High Temperature Operating (HTO) Test is conducted to accelerate the degradation of products and materials by continuously applying voltage and current while exposing them to high temperatures. It is used to detect defects and to verify reliability and durability.
Temperature Cycling Test (TCT) is conducted to evaluate the durability and reliability of products and materials by alternately exposing them to high and low temperatures.This process accelerates degradation and failures caused by thermal expansion and contraction due to temperature changes.
Temperature and Humidity Cycling Test is conducted to evaluate the effects of condensation, corrosion, and insulation failures by repeatedly subjecting products to alternating conditions of high temperature and humidity and low temperature and dryness, simulating actual environmental conditions. This test is commonly used for long-term reliability evaluation of products.