활동

The Challenges
In recent years the problems of “range anxiety” associated with electric vehicles (EVs) have been alleviated by the introduction hybrids (HEVs) and plug in hybrids (PHEVs) and the development of higher energy density batteries capable of storing more energy in the same space. With the increasing popularity of electric vehicles, “range anxiety” is now being replaced by “charging anxiety”. This page addresses the issues associated with providing suitable EV chargers like DC Ev Charger or AC EV Charger and the charging infrastructure necessary to support the growing population of EVs.

It takes about three minutes fill up a petrol or diesel engined car at a filling station with enough fuel to travel about 300 miles, costing about $35 in th USA and about ￡52 ($80) in the UK. To travel 300 miles in a small EV passenger car would need three full charges of a typical 25kWh battery used to power these vehicles costing about $2.50 per charge in the USA with electricity priced at $0.10 per unit (kWh) and ￡2.50 ($3.90) in the UK with electricity priced at ￡0.10 per unit. The low energy cost is one of the attractions of owning an EV. Unfortunately to put the 25 kWh of energy needed to travel each 100 miles into the battery in the same time (1 minute) that the equivalent amount of diesel fuel is pumped into the tank would require a power supply capable of delivering a power of 1.5 MegaWatts. To put this into perspective, 25 kWh is the amount of energy an average household consumes in a whole day. Providing electrical distribution facilities to allow users to consume this amount of energy from the electricity grid in one minute is not practical and even if it was, no EV battery could accept energy at this rate. On the other hand neither is it practical to take 24 hours to charge the battery in a passenger electric vehicle.

http://www.evchargerchina.com/ev-charger/