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Why Do Lithium Batteries Need UN38.3 Testing?

1. Analysis of the reasons why lithium batteries need UN38.3 testing

The UN38.3 certification project is actually Article 38.3 of Part 3 of the "United Nations Manual of Transport Tests and Standards for Dangerous Goods" drafted and implemented by the United Nations. The specific definition is based on the "Rules for the Transport of Dangerous Goods". carry out testing. Lithium batteries are divided into rechargeable lithium ion batteries and non-rechargeable lithium metal batteries. Each type of lithium battery must be tested and no problem can be issued before the UN38.3 safety inspection report is issued. At this time, the lithium battery will be identified as capable Safe transportation (more common such as air, sea). Any laboratory capable of conducting UN38.3 test can issue the report, but if only the UN38.3 report is available in China, batteries cannot be shipped for export. It is also necessary to provide the identification report of the cargo transportation conditions, referred to as the identification report, which is divided into air transport, sea transport and land transport. It is very necessary and meaningful to make a lithium battery UN38.3 certification project report.

According to the requirements of civil aviation regulations, airlines and airport cargo collection and transportation departments should review the transportation documents of lithium batteries, and the most important thing is the UN38.3 testing report of each type of lithium battery. The report can be provided by a third-party testing organization designated by civil aviation, or by a battery manufacturer with testing capabilities. If this test report cannot be provided, civil aviation will prohibit lithium batteries from being transported by air.

2. UN38.3 testing product range

(1) Various mobile phone batteries. (such as lithium ion battery, lithium polymer battery)

(2) Various power secondary batteries. (such as batteries for power vehicles, batteries for electric road vehicles, batteries for electric tools, batteries for hybrid vehicles)

3. UN38.3 testing items and judgment test qualification standards

(1) Altitude simulation test: under the conditions of pressure ≤ 11.6kPa and temperature 20±5℃.

(2) Thermal test: Under the conditions of 75±2°C and -40±2°C, high and low temperature impact test is carried out, the storage time in the extreme temperature is ≥6h, the high and low temperature conversion time is ≤30min, the impact is 10 times, and the room temperature (20±2) 5°C) for 24 hours, and the total test time is at least one week.

(3) Vibration test: Complete a reciprocating logarithmic frequency sweep sinusoidal vibration from 7Hz to 200Hz within 15 minutes, and complete 12 vibrations in three-dimensional directions within 3 hours.

(4) Impact test: 150g, 6ms or 50g, 11ms half-sine impact, 3 times for each installation direction, 18 times in total.

(5) External short-circuit test: short-circuit at 55±2°C and external resistance <0.1Ω, and the short-circuit time lasts until 1h after the battery temperature returns to 55±2°C.

(6) Collision test/extrusion test: 9.1kg weight is dropped from a height of 61±62.5px on the battery with a 15.8mm round rod, and the surface temperature of the battery is tested by UN38.3 test.

(7) Overcharge test: Under the conditions of 2 times the maximum continuous charging current and 2 times the maximum charging voltage, overcharge the battery for 24 hours.

(8) Forced discharge test: The battery is connected in series with a 12V DC power supply, and the battery is forced to discharge at the maximum discharge current.

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