this post was submitted on 25 Jul 2023
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EU passes law to blanket highways with fast EV chargers by 2025 (www.theverge.com)
submitted 2 years ago by L4s@lemmy.world to c/technology@lemmy.world
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EU passes law to blanket highways with fast EV chargers by 2025::The chargers must be placed every 60km (37mi) and allow ad-hoc payment by card or contactless device without subscriptions.

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[–] rm_dash_r_star@lemm.ee 3 points 2 years ago* (last edited 2 years ago)

When charging an EV it seems the last 10% takes longer than the first 90

It has to do with a li-ion battery's charging curve. In the main phase of charging the charger runs in what's called constant current mode. State of charge and charge time are linearly proportional. When the battery gets to terminal voltage (about 90% charge) the charger runs in constant voltage mode where current falls off as the battery approaches full charge. You can save time and skip CV mode if you don't need that last 10%.