Battery Electric
Electrovaya Selected as Battery Supplier for Plug-In Hybrid Electric Vehicle Program
TORONTO, ONTARIO--(Marketwire - 03/24/10) - Electrovaya Inc. (TSX: EFL - News ) today announced that it has been chosen by Chrysler Group LLC as the battery supplier for 140 Ram plug-in hybrid electric vehicles in a demonstration program. The Ram PHEV will feature a 12kWh lithium ion battery from Electrovaya. A total of 140 Ram PHEVs will be built for a demonstration program running for a period ...
How Types of Chargers for Nickel-based Batteries(2)-fast Charger?
How types of chargers for nickel-based batteries(2)-Fast Charger?
How types of chargers for nickel-based batteries(2)-Fast Charger? Fast Charger — The fast charger offers several advantages over the other chargers; the obvious one is shorter charge times. Because of the larger power supply and the more expensive control circuits needed, the fast-charger costs more than slower chargers, but the investment is returned in providing good performing batteries that live longer.
The charge time is based on the charge rate, the battery’s SoC, its rating and the chemistry. At a 1C charge rate, an empty NiCd typically charges in a little more than an hour. When a battery is fully charged, some chargers switch to a topping charge mode governed by a timer that completes the charge cycle at a reduced charge current. Once fully charged, the charger switches to trickle charge. This maintenance charge compensates for the self-discharge of the battery.
Modern fast-chargers commonly accommodate both NiCd and NiMH batteries. Because of the fast-charger’s higher charge current and the need to monitor the battery during charge, it is important to charge only batteries specified by the manufacturer. Some battery manufacturers encode the batteries electrically to identify their chemistry and rating. The charger then sets the correct charge current and algorithm for the battery intended. Lead Acid and Li-ion chemistries are charged with different algorithms and are not compatible with the charge methods used for nickel-based batteries.
It is best to fast charge nickel-based batteries. A slow charge is known to build up a crystalline formation on nickel-based batteries, a phenomenon that lowers battery performance and shortens service life. The battery temperature during charge should be moderate and the temperature peak kept as short as possible.
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