Electrified Vehicle Durability Vehicle Durability Electrified vehicle durability
Electrified Vehicle Durability
Vehicle Durability • Electrified vehicle durability is an important performance parameter for the long term environmental impact of electrified vehicles • Electrified vehicle manufacturers are managing durability to meet customer demands • It is possible to establish durability • Not every manufacturer is establishing durability in the same way • Differences could be due to product differentiation or because of different customer or geographic influences. • There are four major vehicle operating conditions that effect durability • • Vehicle drive cycle or activity and inactivity (discharge rates) Charging type and frequency Ambient temperature during operation Time – calendar life
Vehicle Durability • Four major vehicle operating conditions that effect durability • Vehicle drive cycle or activity and inactivity (discharge rates) • WLTP could be used • FEV reported WLTP would need to be modified to reflect real-world operation of EV’s • Running successive WLTP cycles could be too severe? • Charging type and frequency • Data available? • Are charging patterns developing over time? (changing) • Ambient temperature during operation • How much does ambient temperature effect battery durability? • Time – calendar life • Could testing be accelerated? • Coulomb counting or total energy delivered measurements?
Going forward • Options 1. Recommend that a GTR is appropriate for electrified vehicle durability and note that it will take time to obtain the information required. (cycle, charging, temperature, and time) 1. Initiate a new mandate? 2. EVE or WLTP or another IWG? 2. Extend the mandate of the EVE to continue research into electrified vehicle durability 1. Gather data to inform a future GTR 3. Recommend to the GRPE that it is premature to develop a GTR for electrified vehicles however, it should be revisited in the future.
Recommendation • Begin preparation of a report and recommendations for the GRPE regarding electrified vehicle durability • Engage all stakeholders in the development of the report and the recommendation • Drafting, review and submission within the timeline outlined in the EVE roadmap
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