Oh, right, heh, so the main point I had for the above was that if you never discharge a battery below 90%, then cycles are very likely not counted. Which is another problem in of its self. Batteries do need to be "exercised".
Another thing I was considering just now is that these Lithium iron phosphate batteries are indead pretty cool. However, they would require external circuitry to use with this board. Which is not necessarily a bad thing, but if you're looking to keep costs at a minimum. Then they are not the most ideal solution. On Thu, May 19, 2016 at 12:17 PM, William Hermans <[email protected]> wrote: > Certainly there wil be use cases for all. But one thing you need to be > aware of with recharge cycles on batteries. Is that a recharge cycle is > only counted when the battery voltage falls below a certain percentage. I > believe this percentage is difference for every chemistry type. But I can > say that for lead acid batteries, the recharge cycle is two fold. > > First of the battery discharge goes below 75% this is a normal recharge > cycle. > Second, if the battery goes below 60% discharge is is akin to taking away > 100 normal discharge depth cycles. > > But again, other chemistries I know are going to be different as some stay > fairly steady in voltage throughout their whole discharge cycle. > > On Thu, May 19, 2016 at 11:06 AM, zamek42 <[email protected]> wrote: > >> Hi All, >> >> On 05/19/2016 05:33 PM, Super Twang wrote: >> >>> @Lachlan >>> Thanks for the info Lachlan. >>> >>> Re: Supercap reliability… >>> My basic understanding is that if you design with supercaps for a >>> “Everyday” (ie not too hardcore) indoor use case, and keep them within some >>> pretty obtainable operating conditions they effectively last forever. >>> Obviously there’s some ambiguity (“everyday” “pretty obtainable”, >>> “effectively”) in the prior assertion, but... >>> >>> My particular use case — indoor temps but in a wall, 5v power — might >>> see a temp range of 15° - 35°C max I’d guess. The 70°C - 105°C you’re >>> talking about would have to be a pretty harsh/industrial environment, no? >>> >>> Does anyone (who has done it, or knows how) have a sense of how >>> straightforward it is to achieve a supercap-based system design that keeps >>> the components in a range that’d keep them healthy for “Effectively >>> forever?” ie 20k+ cycles? (better than bats) 100k+? (effectively forever) >>> Or, do the requirements we’re looking at for a basic, indoor, power system >>> really push the supercaps into the “Quickly-used-up” zone? >>> >> Yes we have some experience about supercaps. >> >> We have an organ controller which is working two years ago, approximately >> 3-4 on/off per day. Yes it is an indoor application. >> Our second application is an industrial environment with Pandaboard which >> is working since last september approximately 1 on/off per day. It is a >> semi indoor environment. >> Our third application is a timelapse camera system with Raspberry ( >> http://1nap1perc.hu/pecsi-magashaz-bontas/ ) which is started at early >> of march. It is an outdoor application which is working 7/24. >> >> In other point of view, if you checked the parameters of supercap for >> example >> http://www.newark.com/illinois-capacitor/506dcn2r7q/super-capacitor-aluminum-elect/dp/90R9922 >> you can see: >> >> operating temperature: -40-+60C >> Life cycles: 500000 >> >> A simple NiCd accumulator is much more weight, and its lifecycle is much >> more less, the operating temperature is 0-45C and lifecycle is less than >> 10000. >> >> So supercap seems to be ideal for power supply to an embedded system, >> but it needs a little bit complicated controller electronic. >> best regards, >> >> >> -- >> Zoltan (Zamek) Zidarics >> programmer >> email:[email protected] >> Self Playing Pipe Organ Systems >> http://replayorgan.eu >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- You received this message because you are subscribed to the Google >> Groups "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/36c43943-2e37-e473-1524-398120205a19%40gmail.com >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORpxj0U7XkJVPDeZeBVhsBzQX%2BPVAnkKwgfoUoFTLMfnCw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
