You don't need them matched. More like balanced. There is discussion as to top-balancing, bottom balancing, active or passive BMS, analog or digital BMS, etc.
I went lithium last year and bought a new 100ah 48v pack in the form of 16 cells. They are arranged in groups of 4, strapped together and with cell connections made with laminated copper buss bars. Each 12v group weighs about 30lbs and can easily be lifted with one hand using the 1/4" rope handles on each end-plate. I ten made short 2awg jumpers to connect the packs in series. They are *much* smaller than equivalent capacity lead acid batteries.
/Jason
On May 6, 2015, at 19:31, M Driscoll have2sail75@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
I am looking to power a 48V electric propulsion motor with about 100 ah. Wrestling 60 lb batteries into and out of my small sailboat won't fly.
1) How could I put that power package together with these cells?|
2) I've been told that Lithium cells in a bank need to be 'matched' so they will charge evenly. True? Can you make up a matched set from your stock?OPOLILY
From: "steveschulzy@yahoo.com [electricboats]" <electricboats@yahoogroups.com>I
To: electricboats@yahoogroups.com
Sent: Wednesday, May 6, 2015 1:22 PM
Subject: [Electric Boats] Voltronix Thundersky 90 aha cells New for Sale $90 each [2 Attachments]
[Attachment(s) from steveschulzy@yahoo.com [electricboats] included below]Hello,I have some extra older stock Voltronix Thundersky 90 aha yellow cells. From older stock unused stored appropriately at 3.2v coolThese are new asking $90 each obo better if you purchase morealso have a new Delta QuiQ 72v charger, elcon charger, and various 24v to 48v controllersGreat cells for electric boat projects. My duffy Sparky has a set, love them very good energy to weight ratio.Steve
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Posted by: Jason Taylor <jt.yahoo@jtaylor.ca>
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