Level 3 DC fast chargers degrade the battery faster than level 1 and 2 AC chargers. Rapidly charging a battery means high currents are created the cause high heat, whitch is known to put a strain on batteries witch affects the batteries state of health. As EV’s evolve so will battery management systems. Depending on battery chemistry the difference between DC fast charging and AC charging degradation can be mitigated down to >1.5% Just because an EV will accept 150kw charge doesn’t mean you should do it every day. in the same way If a path led to a cliff edge you wouldn’t carry on walking off the cliff. That is why I recommend using DC fast chargers when your away for a few days or more.
Seasonal / hot weather can also affect the batteries state of health.
Charging and discharging patterns such as draining the capacity of the battery or continual DC rapid charging of the battery can accelerate battery degradeation.
Charge and discharge patterns are measured in c rates per hour. 1 c rate indicates that the battery will be fully charged or discharged in an hour at current level.
Battery life is dependent on the chemistry of the Lithium battery – (NMC)Lithium Nickel Manganese Cobalt Oxide, (NCA) Lithium Nickel Cobalt Aluminum Oxide or (LFP) Lithium Iron Phosphate.
For LFP batteries charging rates above 1 c adversely affect the battery life. Where as NMC batteries have rapid DC charhing power restrictions that do not allow the c rate to go beyond 1 c. By the battery design of NMC batteries they won’t come close to exceeding 1c even without any battery management while using fast chargers. Similar can also be said about NCA batteries. So for fast and ultra fast chargingto eceed this is minimal and degradation is around 4%. However compared to AC charging, DC charging, Over 300 cycles can degrade the battery by up to 10%.. However because of battery management the effect is kept to a minimal.
I have just checked and the Niro 39/64kw use a NMC battery so whils’t degradeation using rapid DC chargers will be kept to a minimal it still occurs. Considering battery warranty is 8rs or more it will not affect mb customers nor will ant degradeation be detrimental.
I gained ETL qualification along with others that I can’t think of at moment but basically safety, prevent failure in 2016 when I was working otherwise I wouldn’t have been able to work on large UPS banks as well as suppling mains power which was a doddle of a job.
I have probably gone tech heavy and blew everyones minds. When all I was trying to achieve was to sugest a little experiment to @Tillyman so he could try to replicate the mileage achieved by (forgot) directing his solar panels to charge his EV. ?
Anyone need a Co-codamol 🙂