UN38.3 testing is a mandatory test taken to ensure that lithium batteries can be safely transported by air and sea. The Civil Aviation Administration of China has issued the "Lithium Battery Air Transport Specification" to all air transport companies, which clearly requires that lithium batteries must undergo UN38.3 testing by CNAS accredited laboratories before air and sea transportation. All airlines must receive the UN38.3 qualification report and transportation certification for lithium batteries before accepting them for transport.

1、 UN38.3 certified product scope

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

B. Various power secondary batteries (such as power vehicle batteries, electric road vehicle batteries, electric tool batteries, hybrid vehicle batteries, 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, camera 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.)

2、 Test project

T. 1. High altitude simulation test

Under the conditions of pressure ≤ 11.6kPa and temperature 20 ± 5 ℃, store for more than 6 hours without leakage, exhaust, disassembly, rupture, or combustion.

T. 2. Thermal testing

Conduct high and low temperature impact tests at 72 ± 2 ℃ and -40 ± 2 ℃, with a storage time of ≥ 6 hours at the extreme temperature, a high and low temperature transition time of ≤ 30 minutes, 10 impacts, and a storage time of 24 hours at room temperature (20 ± 5 ℃). The total test time should be at least one week

T. 3 Vibration test

Complete one reciprocating logarithmic sweep sine vibration from 7Hz to 200Hz within 15 minutes, and 12 three-dimensional vibrations within 3 hours; Logarithmic sweep frequency: maintain a maximum acceleration of 1gn from 7 Hz until the frequency reaches 18 Hz. Then maintain the amplitude at 0.8 millimeters (total offset of 1.6 millimeters) and increase the frequency until the maximum acceleration reaches 8 gn (frequency of approximately 50 hertz). Maintain the maximum acceleration at 8gn until the frequency increases to 200 Hz.

T. 4 Impact Test

150g, 6ms or 50g, 11ms half sine impact, 3 times for each installation direction, a total of 18 times;

T. 5 External Short Circuit Test

Short circuit under the condition of 55 ± 2 ℃ and external resistance<0.1 Ω, and the short circuit time lasts for 1 hour after the battery temperature returns to 55 ± 2 ℃.

T. 6 Collision Test

A 9.1kg weight was dropped from a height of 61 ± 2.5cm onto a battery with a 15.8mm round rod, and the surface temperature of the battery was measured.

T. 7 overcharge test

Under the conditions of twice the maximum continuous charging current and twice the maximum charging voltage, overcharge the battery for 24 hours.

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.

3、 Materials required for UN38.3 certification

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

B、 Fill out the commission form with a signed and stamped document;

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

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