Sound impossible? It might be if the charger worked like any other on the market. It doesn't. The JFE system uses lithium-ion batteries to store energy during off-peak hours, then directs all of this energy in a three minute burst into the EV. By utilizing batteries for energy storage, the charger does not rely on super high amperage nor does it require rewiring of existing facilities to function correctly. Running on a standard current, JFE states that its system could save a gas station an average of $9,500 per year (U.S.) in electricity costs over a traditional fast-charging setup, but failed to mention how much more it could add in upfront costs.
Almost everything has a downside and the JFE charger is no exception. To get the full benefit of this new system, EVs will have to be reprogrammed and additional battery safeguards may be needed. Yeah, that's quite a drawback, but the system will work at 'normal' speeds (recharging an EV to 80 percent capacity in about 15 minutes) without these changes. JFE is discussing the adaptations with automakers and hopes that the idea of a three-minute half-charge will convince them to make the necessary changes.
[Source: Green Car Advisor]