Jerry, The datasheet says it is a monitor/balancer. Balance current is 100mA and what I understand from the description is that a single external resistor is multiplexed between the high cells, so worst case if you have 1 low cell and 6 high cells, each high cell effectively is connected to the resistor 1/6th of the time So - balancing is very minimal but may be enough if the pack si allowed time to balance and the imbalance is small. Note that each chip draws from the batteries that it is monitoring, so if there is imbalance in the supply current between chips then that can be a cause of imbalance in the pack even though that draw is 1000 times smaller than the balancing current. Note that the chip is autonomous - it does not need an external controller to do the balancing. Balancing can be passive (resistor) or active (I presume pumping the energy from the high cells into a low cell)
Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.com Skype: cor_van_de_water XoIP: +31877841130 Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 -----Original Message----- From: [email protected] on behalf of jerry freedomev Sent: Tue 4/8/2014 9:57 AM To: Electric Vehicle Discussion List Subject: Re: [EVDL] my time to rant Hi Lee and All, I found this new Li battery charge, monitor and possible cell balancer like Lee's does though electronically and at far, far less parts count. AS8506 smart cell-monitoring ICs But I don't have the expertise to tell if this is a good IC for a quality but low cost BMS with active balancing but if it is will cut the cost of installing lithium and keeping them alive at a reasonable cost. It sells for $9.10 in 1,000 lots for the IC and each covers 7 cells. It seems to be for E bikes but can it work on higher amphr cells? Does it actually actively balance the cells? Thanks, Jerry Dycus PS sorry I can't change the subject line, etc as Yahoo changed and I haven't figure it out yet. On Tuesday, August 6, 2013 12:17 PM, Lee Hart <[email protected]> wrote: A good rant, Wayne. :-) Electric Blue auto convertions wrote: > Why is so necessary to have all this talk about Tesla's sales... 99% of the public couldn't care less about EVs, but they do love a good fight. They like to boo the villains, and cheer for the little guy. Car dealers are high on many people's list of villains, so they'll cheer for Tesla even though they don't give a d**n about EVs. The other likely reason is that Tesla stock is (finally) moving up. Lots of people only care about money, so this gets them interested in Tesla. They could be selling baby formula made out of toxic waste, and they'd *still* buy the company if it meant making big money. > Now on the batteries.. that's even a bigger joke. When I read about a > new, improved, change your life battery and see their web site, the first > thing you see is an "investor" tab. LOL I smell scam... For a very long time, promoting "miracle" batteries has been one of the tried-and-true ways to swindle people out of money. Here's a quote from Tom Edison in 1883! "The storage battery is one of those peculiar things which appeals to the imagination, and no more perfect thing could be desired by stock swindlers than that very selfsame thing... Just as soon as a man gets working on the secondary battery it brings out his latent capacity for lying." -- Failure is only the opportunity to begin again more intelligently. -- Henry Ford -- Lee A. Hart, http://www.sunrise-ev.com/LeesEVs.htm _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140408/8d3a2215/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
