While the general perception is that battery life spans fall short of claims, the new study suggests the opposite might be true
For EV buyers, battery maintenance and potential replacement is a major worry. To fix that, EV manufacturers are heavily focused on developing advanced battery packs that can last longer. However, a new study reveals that such efforts may not actually be needed since battery packs can last much longer in real-world scenarios.
EV batteries can have 40% longer lifespan
In a new study conducted by scientists at the SLAC-Stanford Battery Center, it has been found that EV battery packs could have a longer lifespan. The study points to a flaw in existing battery testing methodologies that fail to replicate real-world scenarios. The results of the study seem counterintuitive, as general perception is that real-world scenarios will reduce battery life. But the study claims that the opposite might actually be true.
The primary issue pointed out in the study is that battery testing is done based on constant discharge and recharge cycles. However, this may not be the case in a real-world driving scenario. That’s why battery life cycles determined in a laboratory environment may not indicate the real lifespan of EV battery packs. Real-life driving can have various variations instead of a constant discharge and recharge cycle.
For Example, both short trips and long-distance touring may be involved. There are stops at the traffic signals and EVs spend significant time in the parking area. Things like regenerative braking and acceleration also impact battery lifespan. Charging behaviour also varies, with some users choosing daily charging whereas others might only charge once or twice a week. All these factors are not accounted for when testing EV battery packs in a laboratory environment.
EV battery testing with real-world scenarios
To get a more realistic estimate of EV battery lifespan, four distinct discharge profiles were created based on driving data. These were then used to test 92 commercially produced lithium-ion battery packs. The tests were conducted for a period of more than two years. The findings of the study were quite surprising and counter intuitive. For example, it was found that sharp, short acceleration can actually reduce battery degradation. Similarly, regenerative braking was found to improve the life of EV battery packs.
However, factors like extreme heat and cold conditions can also impact battery lifespan. In this study, the temperature was set at a constant 35° Celsius. It is likely that more robust studies will be needed to get a more realistic view of EV battery lifespan.
Findings of this study could encourage more people to shift to EVs. The data gathered can also help OEMs to improve their battery management software. It can help optimize battery lifespan in real-world driving conditions. Battery warranty could be extended, which will ensure greater peace of mind for EV buyers.
Source
Source: Electric - rushlane.com
