Electric vehicle batteries and chargers

A123Systems Unveils Lithium-Ion Battery Technology that Delivers Unprecedented Levels of Power, Safety and Life

Nanotech-Enabled Batteries Deliver up to 10X Longer Cycle Life, 5X Power Gains and 5-Minute Charge Time; Company Discloses Multi-Year Deal with Black & Decker to provide battery for its DEWALT brand of Power Tools

Battery University

What's the best battery?

Battery novices often brag about miracle batteries that offer very high energy densities, deliver 1000 charge/discharge cycles and are paper-thin. These attributes are indeed achievable but not on one and the same battery pack.

Well this time I bought 4 of the Dewalt 33-volt battery packs. I want to put them together as a single battery pack and I was hoping some of you can help.

1. Do I need to put a diode between the battery packs so they wont try to charge each other?

2. If so should I use Schottky Diodes?

3. If that answer for 2. is yes then where is a good source for these diodes.

36v, 10ah NiMH vs one dewalt 36 volt lithium ion batterie? what batteries have more power and range? this if i use an electric bicycle.thanks for the attention.

I need to find a good two wire connector (both male & female) for charging my batteries.
I'll have two #8 or #6 wires comming from my batteries and I want to mount one of the connectors on the bike, the other will be on a pigtail from the charger (#8 wire).

Well, after receiving 4 dewalt batteries, I connected them up together at 36 volts, then tried to connect them in 2 pairs in parallel, then the 2 pairs in series to to get 72 volts. I got a nice spark out of that and it took me a while to figure out what I had done wrong. I should have checked the schematics before connecting them, could have saved myself a lot of aggravation. I'm hoping that I can get replacement battery management systems from some of the members that take them out and don't use them. I need three at present, to replace the 3 that I fried.

Is anyone using the Eon Lithium EV Battery for sale at Electric Rider?

http://www.electricrider.com/batteries/eon254860.htm

Mark

Autoblog Green Podcast #4 - Altairnano CEO Alan Gotcher - A very interesting interview about the altairnano batteries, and the Phoenix SUT which is close to being sold.

So I picked up some saft surplus nicad 1/2D cells today and im wonderin if this was a good idea. Lookin at the + side of these cells, they have two notches cut into opposite sides and that doesn't seem to be the norm. Is the battery suppose to have these notches cut into it like that?

I just heard about a new group, the Open Source Battery Project for Electric Vehicles
http://autos.groups.yahoo.com/group/OSBP4EVs/

This yahoo!group just opened up, and they say they're working on designing a battery pack system for EV's.