I do have a BMS that does active balancing. And I would recommend a BMS that does active balancing. Especially if you want an install it and forget it battery. But if you do go with a BMS that only monitors the battery, if as you say you keep the cell between 2.5 and 3.5, on a well balanced battery pack, then I doubt you would have to rebalance very often, maybe never. But you might, with either top or bottom balancing both are a bit time consuming. By not having a BMS that balances, you are by default the "active balancer"
I will say I don't recommend the type of LiFePo BMS that have a little circuit board attached to each cell. The chance of them short circuiting is simply to great.
If I was buying a BMS today, I would probable go with the Orion BMS.
But that would not make a ton of financial sense for the original poster as he was only talking about a $400 dollar 12v 100ah pack. Which is why I wanted to give good advise for his personal situation.
To be more general, if your battery pack cost more then $2000 bucks I would highly recommend the peace of mind an active balancing BMS would give you. Under that cost, a good BMS might not be worth the extra cost. But you will need to preform a bit of semi-yearly maintenance instead.
On Sep 15, 2018, at 9:52 AM, clh5_98@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
James (not Lamden),are you proposing that a BMS is not necessary for a Lithium pack. I have heard of this being done. Even one distributor of CALB cells has a white paper discussing this. Essentially they bottom balance the cells individually before hooking them in series and then just never charge them beyond 3.5 VPC, or let them go below, I think 2.5 VPC. Seems like, with periodic cell monitoring like you mentioned and a fully configurable, high quality charge that going BMS less is possible. Thoughts anyone?Chris
__._,_.___
Posted by: "james@deny.org" <james@deny.org>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (36) |
Have you tried the highest rated email app?
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.
SPONSORED LINKS
.
__,_._,___
No comments:
Post a Comment