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Upholding Lithium Battery Safety through Certification and Rigorous Testing

Date:2024-05-24

In recent years, driven by the increasing demand for new energy vehicle power batteries, energy storage batteries, and consumer electronics batteries, the battery industry in the global market, as one of the pillars of green development, has experienced rapid growth and maintained steady progress.

For a long time, lithium batteries have played a vital role in many electronic devices, such as digital devices and Internet of Things (IoT) devices. Given their indispensability in consumer electronics and mobile devices, ensuring the safety and reliability of lithium batteries is paramount. To achieve this, lithium batteries must adhere to a series of key certification requirements to guarantee their safe and effective operation.

MOTOMA batteries are manufactured in compliance with all safety requirements and have obtained multiple certifications, providing users with peace of mind regarding the safety of our lithium batteries.

lithium ion battery quality

high-safety lithium ion battery manufacturing

Some of the primary safety certifications for lithium batteries include:

UN38.3 Certification for Lithium Batteries

UN38.3 testing is mandatory to ensure the safe transportation of lithium batteries by air and sea. The test evaluates the safety performance of lithium batteries during transportation to prevent safety accidents such as fire or explosion.

lithium ion battery certification

Material Safety Data Sheet (MSDS)

MSDS, also known as Chemical Safety Information Sheet, is a comprehensive document that provides information on the safety and hazards of chemicals, including lithium batteries. It is essential for manufacturers and users to ensure safe production and use.

UL Certification

UL certification, issued by Underwriters Laboratories, ensures that lithium batteries meet stringent safety standards through comprehensive testing for fire resistance, chemical leakage prevention, and electrical performance.

CE Certification

CE marking indicates compliance with safety, health, and environmental protection requirements specified by European legislation. It covers safety and performance testing, though standards may vary, making compliance challenging for some manufacturers.

IEC/EN 62133 Standard

The IEC 62133 standard, developed by the International Electrotechnical Commission (IEC), is the most important global standard for lithium-ion batteries and serves as a basis for IECEE-CB certification.

RoHS Compliance

The RoHS (Restriction of Hazardous Substances) standard regulates the materials and processes used in electrical and electronic products to protect human health and the environment by restricting substances such as lead, mercury, and cadmium.

FCC Certification

FCC certification is mandatory for lithium batteries with wireless communication functions to ensure they do not cause electromagnetic interference to other electronic devices.

Other Certifications: KC, NOM, BIS, SII, PSE

Additional certifications may be required for specific markets, such as Korea (KC certification), Mexico (NOM certification), India (BIS certification), Israel (SII certification), and Japan (PSE certification).

To ensure battery design compliance with safety standards, comprehensive testing and evaluation are essential. Manufacturers must ensure that their lithium battery designs comply with safety standards to enhance consumer and industry confidence. Factors such as chemical containment, thermal management, mechanical integrity, and electrical performance must be considered during design.

lithium ion batytery testing lab

MOTOMA testing laboratory

MOTOMA batteries undergo rigorous testing according to various safety standards, including but not limited to:

1. Altitude Simulation Test:

Purpose: To evaluate the battery‘s performance under simulated altitude conditions and verify its ability to function properly under low-pressure conditions.

Method: Place the battery in a low-pressure environment (typically at pressures ≤11.6 kPa) and store it for at least 6 hours at a temperature of 20±5℃. Observe for leakage, gas release, disintegration, rupture, or combustion.

2. Thermal Test:

Purpose: To assess the battery‘s performance under high and low-temperature environments and verify its functionality under extreme temperature conditions.

Method: Subject the battery to high and low-temperature shock tests at 72±2℃ and -40±2℃ respectively, with a storage time of ≥6h at extreme temperatures, a temperature transition time of ≤30min, 10 shocks, and 24h storage at room temperature (20±5℃). The total test duration should be at least one week.

3. Vibration Test:

Purpose: To test the battery‘s durability under vibration conditions and verify its ability to withstand vibration during transportation or operation without damage.

Method: Conduct a sinusoidal vibration test with logarithmic sweep frequency within a specified frequency range, gradually increasing the amplitude from 7Hz to 200Hz, and then maintaining vibration at a specific amplitude.

lithium ion battery testing

MOTOMA semi-finished product testing

4. Impact Test:

Purpose: To assess the battery‘s stability when subjected to external impacts and verify its ability to withstand external impacts without damage.

Method: Apply specific half-sine wave impacts (e.g., 150g, 6ms or 50g, 11ms) to the battery, with multiple impacts in various mounting orientations. Observe for surface temperature and appearance damage.

5. External Short Circuit Test:

Purpose: To test the safety of the battery under short circuit conditions and verify its stability under short-circuit conditions.

Method: Subject the battery to external short circuit under specified temperature conditions (e.g., 55±2℃), and observe the duration of short circuit until the battery temperature returns to the specified temperature for 1 hour.

lithium ion battery lab

MOTOMA testing laboratory

6. Collision Test:

Purpose: To evaluate the safety of the battery when subjected to collisions and verify its ability to remain stable under collision conditions.

Method: Drop a weight from a specific height onto the battery and observe for surface temperature and appearance damage.

7. Overcharge Test:

Purpose: To test the safety of the battery under overcharge conditions and verify its stability under overcharge conditions.

Method: Subject the battery to overcharge treatment, typically charging for 24 hours under conditions of twice the maximum continuous charging current and twice the maximum charging voltage.

8. Forced Discharge Test:

Purpose: To test the safety of the battery under forced discharge conditions and verify its stability under forced discharge conditions.

Method: Connect the battery to a DC power source and perform forced discharge at the maximum discharge current.

9. Cycle Life Test:

Purpose: To evaluate the battery‘s cycle life and charge-discharge performance, verifying its stability after multiple charge-discharge cycles.

Method: Perform multiple cycle charge-discharge tests on the battery and record the charge-discharge capacity and voltage changes for each cycle.

lithium ion battery qe

MOTOMA testing laboratory

10. Internal Resistance Test:

Purpose: To assess the battery‘s internal resistance, verifying the quality of its internal structure and materials, as well as the stability of its performance.

Method: Measure the internal resistance of the battery in different charge-discharge states using specific testing equipment.

11. Safety Protection Device Test:

Purpose: To evaluate the effectiveness of the battery‘s safety protection devices (such as fuses, protection circuits, etc.) and ensure timely circuit interruption in case of abnormalities to prevent hazards.

Method: Simulate various abnormal conditions (such as overcharging, over-discharging, short circuits, etc.) and observe the response and action of the safety protection devices.

MOTOMA battery assembly line employs laser welding technology.

12. Temperature Characteristics Test:

Purpose: To evaluate the battery‘s performance under different temperature conditions, verifying its reliability under extreme temperature environments.

Method: Place the battery in different temperature environments (e.g., high temperature, low temperature, etc.) and test its charge-discharge performance and stability.

13. Self-discharge Test:

Purpose: To evaluate the battery‘s self-discharge rate during storage, verifying its ability to maintain battery capacity during prolonged periods of non-use.

Method: Fully charge the battery and place it for a period of time, regularly measuring its self-discharge rate.

14. Puncture Test:

Purpose: To assess the battery‘s resistance to external object puncture, evaluating its puncture resistance and safety performance after being punctured by external forces to prevent safety hazards.

Method: Use standardized needles to apply force at a certain speed on the surface of the lithium battery, simulating possible external object puncture situations. Record the applied force, puncture depth, and battery reaction, including leakage, gas release, disintegration, or rupture.

These tests aim to comprehensively evaluate the safety and stability of lithium batteries under various environmental conditions, ensuring they can operate safely without issues.

lithium ion battery