Search found 5 matches

by themotorman
Tue Jan 19, 2010 7:00 pm
Forum: All things battery related
Topic: series or parallel
Replies: 5
Views: 5919

Lifepo4 batteries follow up

thanks Jeremy, It is really great to get info from actual users. It seems that the BMS is absolutely critical to the Li chemistry and the QC in China is suspect if it even exists! I tried to get the A123 20 Ahr cells but cannot find them anywhere for sale. I am trying to build about 100 cars a year ...
by themotorman
Tue Jan 19, 2010 5:49 pm
Forum: All things battery related
Topic: series or parallel
Replies: 5
Views: 5919

series or parallel and types of LiFePO4

thanks for comment. What is opinion on cylindrical cells or flat prismatic cells? I can use either depending on my enclosure shape and size. The prismatics look good but that's probably because they stack nicely but they are heavier due to the case and also have no natural compression to keep the pl...
by themotorman
Tue Jan 19, 2010 5:09 am
Forum: All things battery related
Topic: series or parallel
Replies: 5
Views: 5919

series or parallel

I need 400 volts 20 Ahr total and can get 8 packs of the same size into my own designed ecar. I can either get 50 volt 20 Ahr packs and connect them all in series or get 100 volt 10 Ahr packs and have two strings that are connected in parallel. Cost is the same as the total cell count is the same BU...
by themotorman
Sun Jan 17, 2010 10:48 pm
Forum: General
Topic: LiFePO4 and BMS
Replies: 1
Views: 3633

LiFePO4 and BMS

I know this is not really anew topic but I have found some sources in China for batteries but not a reliable BMS. I would like to buy a BMS complete to handle 8 pack each 50 volts 20 Ahr connected in series to give a 400 volt bus. Any sources welcomed. Batteries are around $1.0USD /Ahr from most sup...
by themotorman
Sun Jan 17, 2010 10:43 pm
Forum: General
Topic: Triumph Spitfire 1500 Conversion
Replies: 5
Views: 8314

spit conversion

I took a 76 spit and have made a 3 wheeler using a motorcycle rear end . 8 Kw of li packs and it runs great. If you can keep the transmission do so and bolt on the motor to it. Electric motors need to run at high speed for efficiency so you need the gear box. Also if you have any hills and for getti...

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