Moisture Is a Safety Issue for Batteries, Not Just a Quality One
Lithium cells and battery packs are hygroscopic at the worst possible points. Moisture that reaches the electrode materials or the cell vents can drive internal corrosion, gas generation and capacity loss, and in the electronics around the pack it causes the usual short-circuit and corrosion failures. Because lithium batteries also ship as dangerous goods under the IATA and IMDG regulations, an avoidable moisture failure is not just a warranty cost — it sits inside a consignment that is already under heightened scrutiny.
Battery and EV-component shipments compound the risk: they often move in large, dense, steel-rich loads on long ocean routes where container rain is severe, and the packing is frequently timber and board that hold litres of bound water. The defence is a dry micro-environment — calcium chloride to hold the container or crate humidity down, and clay desiccant inside any sealed barrier bag around control electronics, sized to the real load by DIN 55474.