What is UN38.3 in foreign trade?

UN 38.3: detailed description of lithium battery test

1 background introduction

The UN38.3 test of lithium batteries refers to the relevant chapters of the United Nations Manual of Testing and Standards for the Transport of Dangerous Goods specially formulated by the United Nations. That is to say, lithium batteries must undergo high simulation, high and low temperature cycling, vibration test, impact test, external short circuit at 55℃, impact test, overcharge test and forced discharge test before transportation to ensure the safety of lithium batteries.

Since 199 1 year, there have been 60 air fires caused by lithium batteries in the United States alone. Therefore, it is clearly stipulated in scaa of our country that whether there is UN38.3 test report or certificate of conformity should be checked for battery transportation, and those without it cannot be received and shipped.

2 UN 38.3 Specific test methods for lithium batteries

Lithium batteries must be tested in the order of 1 to 5. Experiments 1 to 4 require that the mass loss of batteries with a mass greater than 5g should not exceed 0. 1%, and the batteries should have no leakage, no exhaust, no disintegration, no rupture and no combustion. After the test, the open-circuit voltage of each battery should not be less than 90% of the voltage before this test.

1. Height simulation

At the ambient temperature of 20℃ 5℃, the battery was kept under the air pressure of 1 1.6kPa for 6 hours.

2. Temperature test

The battery was stored at the test temperature of 75℃ 2℃ for at least 6 hours, and then at the test temperature of-40℃ 2℃.

Store for at least 6 hours. The maximum time interval between two extreme temperatures is 30 minutes. This process must be repeated 10 times, and then all batteries should be stored at the ambient temperature of 20℃ 5℃ for 24 hours.

Step 3 shake

The vibration is sinusoidal, the frequency swings between 7Hz and 200 Hz, and then returns to the logarithmic sweep frequency of 7 Hz for 15 minutes.

This process must be repeated 12 times in each of the three mutually perpendicular battery installation directions, with a total duration of 3 hours.

4. Influence

The battery must be able to withstand a half-sine wave impact with a maximum acceleration of 150g and a pulse duration of 6 ms Each battery must be in three

The positive and negative directions of battery installation directions perpendicular to each other suffered three impacts, totaling 18 impacts.

5. External short circuit

When the external resistance of the battery is less than 0.1Ω, the short-circuit test is conducted at the ambient temperature of 55℃ 2℃, and the short-circuit time is

After the battery temperature returned to 55℃ 2℃, the observation was continued for 6 hours. It is required that the battery shell temperature shall not exceed 170℃, and there shall be no disintegration, rupture and combustion within 6 hours after the test.

Step 6 overwhelm ...

Charge the battery for 24 hours under the conditions of twice the maximum continuous charging current and twice the maximum charging voltage, and observe 7.

Jesus Christ. The battery should not burn and decompose within seven days.

Guangzhou Banghe Testing Technology Co., Ltd. (Guangzhou MCM Certification &; Detection Co., Ltd. (MCM for short) was established in 2007, formerly known as Guangzhou Yue Hong Information Technology Co., Ltd., which is affiliated to He Gang Group (HK) Co., Ltd. The company is located in Tianan Energy-saving Science and Technology Park in Guangzhou, with convenient transportation, beautiful scenery and numerous high-tech enterprises. It is a non-profit, impartial third-party service organization, approved by China National Accreditation Committee for Conformity Assessment (CNAS), specializing in battery certification and testing.

MCM not only has complete battery testing equipment, but also has the first batch of domestic technical experts who carry out UN38.3 testing, UL, CSA, PSE and other certification testing. MCM can now provide CB, CE, PSE, UL, KC, IEEE, ROHS, UN 38.3, commodity inspection, inspection and other battery certification and testing services. In recent years, the company has continuously strengthened cooperation with government agencies and many certification and testing institutions at home and abroad, and maintained a good cooperative relationship. The business has gradually involved in certification and testing services for mineral products, food, chemical element analysis, soil, carbon steel and other products, especially as a professional battery CB laboratory and battery UN38.3 certification and testing institution in China. Adhering to the service tenet of "independence, fairness, accuracy and efficiency", the company has provided high-quality certification and testing services for many customers at home and abroad.

5UN38.3

The scope of application covers almost the whole world and belongs to safety and performance testing. As long as the consignment package involving air transport contains lithium batteries, whether it's button cell or not? A battery is installed on the device? Or the battery that comes with the device? It is necessary to carry out UN38.3 test and obtain the air transport appraisal report before passing the air inspection. The certification period varies from a few days to a month (mainly depending on the product capacity and the test of the preliminary conditions), and the certification fee ranges from several thousand yuan to hundreds of thousands of yuan. Recently, the formal enforcement of UNDOT(UND38.3) has caused many manufacturers to wander around and find no suitable third-party testing institutions. In fact, as long as they meet the requirements of IEC 17025 in the laboratory, have relevant UN38.3 testing professional equipment and strong technical guidance as the backing, they can carry out UN38.3 testing and issue UN38.3 testing reports; It is worth noting that the final air transport appraisal report must be reviewed and issued by the dangerous goods appraisal agency directly authorized by the Civil Aviation Administration of China. The difference between UNDOT(UND38.3) and other certifications is that the effect of other certifications is reflected in the terminal sales market. If you really want to learn foreign trade well, go to Shenzhen Foreign Trade Forum szfob more, which is much better than reading books, because there are many practical things in Shenzhen Foreign Trade Forum szfob, and all the friends in it are from practice.

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By the way, un refers to the United Nations.