Hello "dovepa at bellsouth.net" AKA "via EV", I have no idea who you are - the message is not signed and your name is not showing from your email. You can believe what you want about Lithiums, but think about that even the Chinese invest in a BMS on every Lithium battery pack that they ship, while they are known to cut corners and reduce cost, so there must be a reason....
Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of via EV Sent: Tuesday, August 04, 2015 5:03 AM To: Electric Vehicle Discussion List; Bill Dube Subject: Re: [EVDL] EVLN: Offset Supercharging degradation w/ pack balancing It's possible he has a defective battery. Also, I still don't believe balances work on Lithium cells. Sent from Outlook On Mon, Aug 3, 2015 at 9:40 PM -0700, "Bill Dube via EV" <ev@lists.evdl.org> wrote: There are too many variables to draw any strong conclusions. The two biggest factors are: 1) The BMS does not have as much time to balance during a fast charge. 2) The cell temperature is typically higher (for many reasons) when you fast charge. The cells don't like high temperatures. "Stale charge" is also large factor in apparent capacity change and happens in all chemistries to varying degrees. It may be a factor in these "tests" on battery pack capacity. (In nicads it can be particularly a large "stale charge" effect and is commonly called "memory effect".) Essentially, when you _gently_ and _fully_ cycle a battery, the apparent capacity becomes much greater after the first full cycle, and often grows a bit more with the second full cycle. The longer it has been since you last accessed the full capacity of the battery, the worse the problem of "stale charge" becomes. Batteries are very complicated chemical beasts. Simple tests often don't tell you the full story. Bill Dube' _______________________________________________ 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/20150804/fabfc5fd/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)
