fatty said:
motomech said:
Just undercharge from the 4.2V max, like your 4.10-4.15V.
motomech said:
Always stay at 1P, if you need more capacity, use larger capacity bricks(pouches).
I read this in another post of yours, but I'm not clear on why?
With cells in parallel, capacity dispersion is averaged out.
Live example attached. Defaults to 8000mAh +/-1%.
I should have been more specific.
I don't like to parallel so I can bulk charge w/ my indestructible Mean Well and ck and balance w/ Battery Medics. And Battery Medics will not balance the cells correctly if they are paralleled.
The RC chargers never seemed to last much more than a year in an ebike application and I used some name brands. Yes, I used the 2 into 1 Y-style balance lead adapters(And those can be tricky, better have the paired cells dead-on even, or there can be an in-rush w/ melted wires), but what I think was hard on the RC chargers was this scenario; Say if you had a pair of 5,000mAh cells paralleled, in other words a 10,000mAh cell and it had gotten off the others, the charger worked too hard to bring it back in-line. I found it to be better to break the pack down and charge in 1P
And I feel the less breaks, either S or P, one has to make w/ LiPoly, in general, the better.
To me, the whole thing about using LiPoly on ebikes is not about fires and safety, that's been blown way out of proportion The biggest con is time, with the multiple steps, it can be time consuming and by not breaking down a pack to charge is one less step.
It also makes for less wires, paralleling can make for a rat's nest real quick.
And while I won't leave charging LiPoly completely unattended, I have no problem leaving the Battery Medics on while I'm not watching them.
So what I'm saying is, to keep w/ the KISS plan, use the biggest bricks that will fit in the space.
But, and this a big but, when the Multistars were discontinued, it hurt the ability to implement this approach. They were available in bricks of 10,000mAh, 15,000mAh and even 20,000mAh and Hobbyking had them on sale all the time. They were such a good deal, that I used to recommended to folks here to consider LiPoly for an ebike application, something I no longer do because of all the flak I used to receive about fires and all that. In fact, several years ago, I bought 8 MS 6S/10,000mAh bricks for $50 (shipped) ea. 4 made a 12S/ 20,000mAh group for $200! At the same time, I bought a bunch of Turnigy 6S/5,000 25C bricks that were on sale for $40 ea. For energy density/ Dollar value, It's hard to beat the Turnigy 25C when it's on sale.
But now days, I don't think that HK puts much of it's LiPoly on sale, but since they really screwed-up their web site, I no longer browse their selection.