BMW’s head of battery development, Andreas Raith, interviewed by the CarAdvice, says that lithium-ion batteries in all-electric and plug-in hybrid cars are designed for “15 years and beyond.”
There is nothing to worry about as BMW took a conservative approach to achieve 70% of battery capacity after 15 years. The field data collected so far indicates that results are better than envisioned.
Life-expectancy for BEVs and PHEVs is on par with ICE cars.
To make batteries durable, BMW utilized thermal management system with liquid cooling.
Andreas Raith said:
“It’s not a marketing statement, those batteries are designed to last as long as the vehicle,”
“We can prove that with the field data that we see today coming in from our existing fleet of plug-in hybrids… it’s fair to say and I think it’s a statement for the entire industry and community, everyone is so concerned about [battery] life time and the engineering community as a whole takes a very conservative approach to preserving those batteries.”
“BMW specification in case of durability is no different between combustion engines or battery driven vehicles. . . .”
Now, will they warranty them for that?