UN38.3 Report

The UN38.3 test is a mandatory test taken to ensure that lithium batteries can be safely transported by air or sea. The Civil Aviation Administration of China has issued the "Specification for Lithium Battery Air Transport" to various air transportation companies, which specifies the requirement that lithium batteries must undergo UN38.3 testing through a CNAS recognized laboratory before being transported by air or sea. Each airline must receive the UN38.3 qualification report and transportation certification of the lithium battery before accepting the lithium battery for transportation.

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1、 UN38.3 Certified Product Scope

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

B. Various secondary power batteries (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, camera batteries, various cylindrical batteries, wireless communication batteries, portable DVD batteries, CD and MP3 batteries)

Player battery, etc.)

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

2、 Test items

T. 1 Height simulation test

Store at a pressure of ≤ 11.6kPa and a temperature of 20 ± 5 ℃ for more than 6 hours without any leakage, exhaust, disassembly, rupture, or combustion.

T. 2 Thermal testing

Conduct high and low temperature impact tests under conditions of 72 ± 2 ℃ and -40 ± 2 ℃. Store at extreme temperature for ≥ 6 hours, high and low temperature conversion time for ≤ 30 minutes, impact 10 times, and store at room temperature (20 ± 5 ℃) for 24 hours. The total test time should be at least one week

T. 3 Vibration test

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

T. 4 Impact test

150g, 6ms or 50g, 11ms semi sinusoidal impact, 3 times per 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, lasting for 1 hour after the battery temperature returns to 55 ± 2 ℃.

T. 6 Impact test

A 9.1kg weight fell 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

Overcharge the battery for 24 hours at twice the maximum continuous charging current and twice the maximum charging voltage.

T. 8. Forced discharge test

The battery is connected in series to a 12V DC power supply for forced discharge at maximum discharge current.

3、 Materials required for UN38.3 certification

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

B. Documents that require signature and seal when filling out the authorization form;

C. Provide battery specifications, photos of the 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 before taking photos.