What about using multiple isolated banks of 40ah strings. Lithiums have little to no peukert effect, so the traditional benefit of paralleling cells for increased capacity and reducing the amp load on each cell is less an issue. This method does increase BMS cost since each string needs a BMS, however. But keeping the strings separate and isolated does have its advantages, like having a known-good, get-you-home reserve pack.
When I grow my 100ah pack, I will add a second 100ah pack exactly as described here.
/Jason
On Oct 18, 2014, at 18:47, Mark F mark.internet@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:
I have connected a pack in series first and then parallel the three series packs.I was able to monitor the packs this way.I just had a test point at 24V on each pack(total pack was 48V).This way I could check the 24V point on each to see if the packs were balanced.My pack was NIMH and I didn't need a complicated BMS though.MarkVancouver
From: "acsarfkram@yahoo.com [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Saturday, October 18, 2014 9:27 AM
Subject: [Electric Boats] parallel - series
I'm getting tired of waiting for my AGM's to die and looking to go Lithium. I have access to a great deal on a bunch of 40 ah Lithium batteries. Has anyone here installed a parallel - series setup? I'm thinking sets of two batteries parallel and then connecting them in series. Any advice?Thanks, MarkSanta Cruz
__._,_.___
Posted by: Jason Taylor <jt.yahoo@jtaylor.ca>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (5) |
.
__,_._,___
No comments:
Post a Comment