UN38.3 testing is a mandatory inspection conducted to ensure the safe transportation of lithium batteries by air and sea. The Civil Aviation Administration of China has issued the "Lithium Battery Air Transport Regulations" to all air transport companies, explicitly requiring that lithium batteries must undergo UN38.3 testing at a CNAS-accredited laboratory before being transported by air or sea. Airlines are required to receive the UN38.3 compliance report and transportation appraisal certificate for lithium batteries before accepting them for transportation.

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1. Scope of UN38.3 certified products

A. Various lead-acid batteries (such as lead-acid batteries for car starting, stationary lead-acid batteries, small valve-regulated sealed lead-acid batteries, etc.)

B. Various types of secondary batteries for power sources (such as batteries for power vehicles, electric road vehicles, electric tools, hybrid vehicles, etc.)

C. Various mobile phone batteries (such as lithium-ion batteries, lithium-polymer batteries, nickel-hydrogen batteries, etc.)

D. Various small secondary batteries (such as laptop batteries, digital camera batteries, camcorder batteries, various cylindrical batteries, wireless communication batteries, portable DVD batteries, CD and MP3

(Player battery, etc.)

E. Various primary batteries (such as alkaline zinc-manganese batteries, lithium-manganese batteries, etc.)

II. Test items

T.1 High-fidelity simulation test

Under the conditions of pressure ≤11.6kPa and temperature 20±5℃, it shall be stored for more than 6 hours without leakage, exhaust, disintegration, rupture, or combustion.

T.2 thermal test

Conduct high and low temperature impact tests under the conditions of 72±2℃ and -40±2℃. The storage time at the extreme temperature should be ≥6h, the transition time between high and low temperatures should be ≤30min, and the impact should be carried out 10 times. Afterwards, store at room temperature (20±5℃) for 24h. The total test duration should be at least one week

T.3 Vibration test

Complete a reciprocating logarithmic frequency sweep sine vibration from 7Hz to 200Hz within 15 minutes, and complete 12 vibrations in three dimensions within 3 hours. The logarithmic frequency sweep starts from 7Hz, maintaining a maximum acceleration of 1gn until the frequency reaches 18Hz. Then, keep the amplitude at 0.8mm (total displacement 1.6mm) and increase the frequency until the maximum acceleration reaches 8gn (frequency is approximately 50Hz). Maintain the maximum acceleration at 8gn until the frequency increases to 200Hz.

T.4 Impact test

150g, 6ms or 50g, 11ms half-sine shock, conducted 3 times for each installation direction, totaling 18 times;

T.5 External short-circuit test

Under the conditions of 55±2℃ and an external resistance of <0.1Ω, the battery is short-circuited, and the short-circuiting duration continues until 1 hour after the battery temperature returns to 55±2℃.

T.6 Collision test

A 9.1kg weight falls from a height of 61±2.5cm onto a battery with a 15.8mm round rod placed on it, and the surface temperature of the battery is measured.

T.7 Overcharge test

Overcharge the battery for 24 hours under the conditions of 2 times the maximum continuous charging current and 2 times the maximum charging voltage.

T.8 Forced discharge test

Connect the battery in series with a 12V DC power supply and perform forced discharge at the maximum discharge current.

III. Materials required for UN38.3 certification

A. 37 samples (37 cells, 8 power batteries or battery packs);

B. Fill in the entrustment form, and sign and stamp the required documents;

C. Provide battery specification sheet, photos of outer packaging box (including inner and outer packaging), and photos of equipment (please refer to the photo template for photography requirements);

D. The outer packing box needs to be labeled with a lithium battery operation label and then photographed.