ElectricVehicle
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- Joined
- Jul 15, 2010
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Nichicon 45 kW with 10kWh (Lithium Ion) energy storage Googled to English
If we had time and couuld work with QC manufacturers we could get some useful design variants:
Combinations of all of the above strategies.
Integrating a load leveling energy storage battery into the QC unit itself makes a lot of sense since the power electronics and control are shared by the battery and the charger, reducing the total costs by tens of thousands over using a separate energy storage (high power charger - battery - high power inverter) with a separate Quick Charge unit.
Reducing and limiting the peak demand would also mean QC units couls be installed on samller utility services and avoid some of the costly upgrades. Reduce power output is good for reducing peak kW demand, but will often mean slightly longer charge times, and cosnequently slight fewer users that can be chaeged from one unit during the day.
If we had time and couuld work with QC manufacturers we could get some useful design variants:
- A bit of onboard storage - say a 35 kW output unit with 10 usable kWh storage would draw 19 kW from the grid for a 30 minute charge... (allowing for intput vs. output power efficiency)
Quick chargers that measure the demand for the ENTIRE site - not too hard - put some current sensors on the power entrance to the site, and control the charging power to keep the site load under some preset level, say 20 kW. A design like this would have the units operating at say, 17 kW output most of the time, but when the air conditioner for the site cycles on, they might drop to 11 kW for the 15 or 30 minutes it takes for the AC to cool down the site and cycle off again.
Solar input to reduce peak demand (you'd charge a little slower at night or during days with heavy black clouds..)
Combinations of all of the above strategies.
Integrating a load leveling energy storage battery into the QC unit itself makes a lot of sense since the power electronics and control are shared by the battery and the charger, reducing the total costs by tens of thousands over using a separate energy storage (high power charger - battery - high power inverter) with a separate Quick Charge unit.
Reducing and limiting the peak demand would also mean QC units couls be installed on samller utility services and avoid some of the costly upgrades. Reduce power output is good for reducing peak kW demand, but will often mean slightly longer charge times, and cosnequently slight fewer users that can be chaeged from one unit during the day.