15 Aug '11, 11am

BYD E6 and the EV Range Solution

BYD E6 and the EV Range Solution

Battery chemistry is important to how long the battery will last, how quickly it can charge, the cost, weight and size. The E6 uses a Lithium Iron Phosphate battery (LiFePO or LFP). These tend to have more life cycles (the number of times the battery can be charged and discharged) than the more standard lithium cobalt oxide batteries (LiCoO2) that are used in consumer electronics. Energy density is, however, lower, which means a heavier and larger battery pack. A vote of confidence for this chemistry is that GM has just joined with A123 systems, an MIT spin-off that makes batteries with a similar chemistry. The E6 batteries can achieve a 50% charge in 10 minutes and will take one hour for a complete charge. While this sounds great, in order to transfer 60 kWh of energy in an hour, a 240-volt charger would have to be operating at a minimum of 250 amps (most residences have ...

Full article: http://cleantechnica.com/2011/08/15/byd-e6-and-the-ev-ran...

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