Traction-battery cell
Stores electrical energy through reversible chemical reactions.
Inside the high-voltage battery pack.
Many cells are electrically connected to provide the pack’s required voltage and capacity.
One small energy container in a larger storage system.
A cell imbalance or temperature fault is identified through controlled battery-system diagnostics.
Battery and drive components are assessed with system diagnostics and model-specific warranty and service guidance, not a universal expiry age.
High-voltage work requires trained facilities. A complete pack differs from a serviceable module, sensor or charging-port repair; no numeric quote is asserted.
BMW cell formats vary by battery generation; a visible model badge does not identify the cell inside.
BMW battery-electric and plug-in-hybrid vehicles as equipped; generation and architecture matter.