Same cells that Tesla uses! Type NMC lithium 18650's. > We found the Quick Charge Chargers to be the best deal for 48 v > chargers, otherwise the Iota is good for lower voltages > > https://quickcharge.com/ > > Ray Walters > > Remote Solar > > > On 2/16/18 4:04 PM, Gary Rochlin wrote: >> Hi Tom; >> >> Each battery consists of 7 pack of 16 Panasonic CGR 1865D batteries >> making >> up a 48V system from what I understand from Panasonic 1.5 kWh. The >> Panasonic tech mentioned he knew of the firm and gave me the name of one >> if >> the tech officers. I'm going to look him up and see if I can get some >> info >> from him. Going to purchase a 48V charger and test each battery to see >> if >> it hold a charge. Thank you for your input. >> >> >> Gary Rochlin / Managing Partner >> Blue Sky Energy >> [email protected] >> 310.422.2908 >> >> >> >> -----Original Message----- >> From: RE-wrenches [mailto:[email protected]] On >> Behalf Of Tom Ruscitti >> Sent: Saturday, February 10, 2018 12:16 PM >> To: [email protected] >> Subject: Re: [RE-wrenches] Older iCel System Lithium Ion Batteries >> (Steve >> Higgins) >> >> Some of my non-solar consulting involves test engineering for lithium >> ion >> materials development. I'm no expert but I do get to work with folks >> developing and testing cells and sit in on industry training and >> conferences >> now and then. I would discourage trying the jump start described here >> without direct guidance from the cell / battery manufacturer and a >> properly >> operating BMS. Li-ion batteries can be much less tolerant to over-charge >> and >> over-discharge than the lead acid we're used to working with in the >> solar >> business. Li-ion batteries require a strictly enforced minimum cutoff >> voltage. For example, the discharge cutoff for one recent client's >> battery >> is spec'd at 2.5V per cell. There can be damage to the anode If voltage >> falls below that. Also, if you try the jump-start on compromised packs >> with >> no BMS, different cells will charge at different rates due to differing >> internal resistance (one function of BMS is cell balancing). >> Over-charging >> can result in permanent capacity loss and also electrode damage. >> Depending >> on the chemistry this sort of damage can increase the risk of thermal >> events. >> I've heard that some BMS will prevent recharging if the minimum cell >> voltage >> limit has been busted, but no first hand experience myself. If you do a >> web >> search on "lithium ion damage over discharge" you'll see plenty of >> discussion. I tried to find specs on the iCel system but didn't find >> anything useful. >> >> be careful, >> >> Tom >> >> -- >> Tom Ruscitti >> Senior Engineer >> >> Taitem Engineering, PC >> 110 S. Albany Street, Ithaca, NY 14850 >> Mobile: (607) 220-7022 >> www.taitem.com >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail [email protected] text 209 813 0060 _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
