How to transact the air/sea freight report of lithium battery DGM?

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Industry Encyclopedia

Time of issue：

2023-07-06 16:51

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Air Transport Appraisal report issued by DGM (Lithium Battery Safety Report)

Lithium battery air transport evaluation report

UN 38.3 test related content

Lithium Battery - What is UN38.3?

It is short for a series of tests in section 38.3 of the United Nations Manual of Tests and Standards for the Recommendations on the Transport of Dangerous Goods to simulate the state conditions of transport of lithium batteries.

That is, before lithium battery transportation, it is necessary to pass high simulation, thermal test, vibration, shock, 55℃ external short circuit, impact test, overcharge test, forced discharge test, to lithium battery transportation safety.

What conditions must the battery string pass the UN38.3 certification?

The following is the test item of UN38.3. If the requirements are met, there will be no problem.

Under the conditions of pressure ≤11.6kPa and temperature 20±5℃, there is no leakage, exhaust, disintegration, combustion, explosion or damage after storage for more than 6h，The open-circuit voltage is not less than 90% of that before the test, and the weight loss requirements are shown in the instructions. 2 High and low temperature cycle under the conditions of 75±2℃ and -40±2℃, high and low temperature impact test is carried out. storage time in the limit temperature is more than 6h, conversion time of high and low temperature is less than 30min, impact is 10 times, and then the room temperature (20±5℃) is stored for 24h，The total duration of the trial was at least one week. No leakage, no exhaust, no disintegration, no combustion, no explosion, no damage, open circuit voltage is not less than 90% of that before the test, weight loss requirements see instructions 3 Vibration test from 7Hz to 200Hz within 15min to complete a reciprocating logarithmic sweep sinusoidal vibration, three-dimensional vibration within 3h 12 times. no leakage, no exhaust, no disintegration, no combustion, no explosion, no damage, open circuit voltage is not less than 90% before the test, weight loss requirements see instructions.

Impact test acceleration of 150gn, 6ms or acceleration of 50gn, 11ms half sinusoidal impact, three times for each installation direction, a total of 18 times. no leakage, no exhaust, no disassembly, no combustion, no explosion, no damage, open circuit voltage is not less than 90% before the test, weight loss requirements see instructions 5 55℃ external short circuit at 55±2℃, external resistance < 0.1Ω under the condition of short circuit, short circuit time lasted until the battery temperature returned to 55±2℃ 1h, observation for 6h. Within 6 hours, no disintegration, no damage, no combustion, battery surface temperature < 170℃ 6 Impact test 9.1Kg heavy weight from 61±2.5cm high on the battery with 15.8mm round rod, test the battery surface temperature, observation for 6 hours.

new specimen is used for each impact. Within 6 hours, no disintegration, no damage, no combustion, battery surface temperature < 170℃ 7 Overcharging test under the condition of 2 times the large continuous charging current and 2 times the large charging voltage, the battery was overcharged for 24h, and observed for 7 days. No disintegration, no combustion 8 forced discharge battery series 12V DC power supply, with a large discharge current for forced discharge, observation for 7 days. No disintegration, no combustion.

1.2m drop (after packaging) Under the condition of 20±5℃, the packed lithium battery falls from 1200mm (the low point of the battery) to 18-20mm thick hard board (the board is spread on the cement floor), from X, Y, Z plus or minus six directions, once in each direction. No leakage, no disintegration, no combustion,

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