The question of the week is: What tolerance applies to performance deviations in lithium ion batteries, and when is a new UN 38.3 test certificate required?
What tolerance applies to performance deviations in lithium ion batteries, and when is a new UN 38.3 test certificate required?
The question of the week is:
What tolerance applies to performance deviations in lithium ion batteries, and when is a new UN 38.3 test certificate required?
Answer from Jürgen Werny (All Battery Service GmbH):
the statement is based on the text in the manual of tests and criteria:
38.3.2.2 Lithium-metal and lithium ion cells and batteries must undergo testing in accordance with the provisions of Special Provisions 188 and 230 of Chapter 3.3 of the Model Regulations before the transport of a specific cell or battery type. Cells or batteries that differ from a tested type in the following ways:
(a) For primary cells and batteries, a change of more than 0.1 g or 20% by mass, whichever is greater, in the mass of the cathode, anode, or electrolyte; or*1
(b) For rechargeable cells and batteries, a change in nominal energy in watt-hours (Wh)*2 of more than 20% or an increase in nominal voltage (V)*2 of more than 20%; or
(c) Any change that would result in failure in one of the tests,
must not exceed the 20% threshold; otherwise, a new UN 38.3 test is required.
