On 27 November 2023, the 8th revised edition of the United Nations Manual of Tests and Criteria was officially released on the United Nations website. The 8th revision of the UN Manual of Tests and Criteria incorporates the revision of the 7th revision of the Manual of Tests and Criteria and its Amendment 1 at the eleventh session of the United Nations Committee of Experts on TDGs and GHS. As a basic test for the safety of battery transportation, Article 38 has been added to the 8th revised edition of the United Nations Manual of Tests and Criteria3.3.Section 2 "Testing of sodium-ion batteries and battery packs" was accompanied by the addition of specific entries on sodium-ion batteries in the 23rd revision of the United Nations Recommendation on the Transport of Dangerous Goods (TDG): UN 3551 and UN 3552. In this issue, we will explain in detail the requirements for sodium-ion batteries in the new version of the "Test and Standard Manual".
Sodium-ion battery UN number.
t.1: Highly simulated (cell and battery) sodium-ion battery test requirements.
Cells and batteries should be at a pressure equal to or lower than 11Store at 6kPa and ambient temperature (20 5) for at least 6 hours.
t.2: Temperature test (cell and battery).
The battery cells and batteries were stored at 72 and -40 ambient temperatures for 6 hours each, completing a total of 10 cycles.
t.3: Vibration (cell and battery).
The battery cell and battery are fixed on the test bench for sine wave sweep frequency vibration, the frequency range is 7 200Hz, and the amplitude is 08mm, the maximum acceleration of cells and small battery packs is 8 gn, and the maximum acceleration of large battery packs is 2 gn.
t.4: Shock (cell and battery).
Small cells: maximum acceleration 150 gn, pulse duration 6 ms;
Large cells: maximum acceleration 50 gn, pulse duration 11 ms;
Small battery: maximum acceleration of 150 gn or the smaller of the formula calculation, pulse duration of 6 ms;
Large battery: maximum acceleration of 50 gn or the smaller of the equation, pulse duration 11 ms.
t.5: External short circuit (cell and battery).
Externally short circuit the cell or battery under the condition that the total external resistance is less than the ambient temperature.
t.6: Impact extrusion (cell only).
Impact (for cylindrical cells with a diameter of 18 mm): with a weight of 91 kg hammer hits the intersection of the steel rod and the cell from a height of 61 cm.
Extrusion (applicable to diamond-shaped, pouch, coin cell cells and cylindrical cells with a diameter of <18mm): the cells are placed on two planes and extruded, and the cut-off condition is that the extrusion force reaches 13kN; or voltage drop of 100mV; or the deformation of the battery cell reaches at least 50%.
t.7: Overcharge (only batteries with overcharge protection).
The charging voltage of the battery is not more than 18V, use 2 times the maximum charging voltage or 22V, whichever is smaller to charge the battery with overvoltage.
The battery charging voltage is greater than 18V, use 12 times the maximum charging voltage for overvoltage charging of the battery. The charging current must be twice the manufacturer's recommended maximum continuous charging current.
Sodium-ion battery test items and sample quantities.
1.Cell: 20pcs (t.)1~t.5、t.6）
2.Single-cell battery: battery cell 10pcs (t.)6), battery 18pcs(t.)1~t.5、t.7）
3.Small battery: battery cell 10pcs (t.)6), Battery 16pcs(t.)1~t.5、t.7）
4.Large battery: cell 10pcs (t.)6), battery 8pcs (t.)1~t.5、t.7）
5.Sodium-ion integrated battery pack with a rated capacity of not more than 6200Wh: t3、t.4 and t5 (1pcs in total), if it is a rechargeable battery pack, the test should also be carried out t7（1pcs）。
6.Sodium-ion integrated battery packs with a rated capacity of more than 6200Wh: no testing required. However, the following protections need to be verified: overcharge; Short circuit; and over-discharge between the battery pack.
Sodium-ion battery and lithium-ion battery test differences.
Sodium-ion batteries do not need to be tested t8. Forced discharge;
Test t6. When impacting and extruding, the state of charge of the sodium-ion battery cell and the sodium-ion single-cell battery is fully charged.
Summary. The MCM has the ability to implement the new version of UN 383. Full testing capabilities, able to provide widely recognized test reports for battery products. If you have related sodium-ion battery transportation testing needs, please feel free to contact us, we will be happy to provide you with professional testing support and services.