Which Charging Method is Best?
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From: Robert Baer on 27 May 2010 04:14 Saturation wrote: > There are at 3 popular methods to recharge secondary batteries, and > variations of these: > > Constant current, or galvanostatic > > Pulse charging > > Burp or Reflex charging > > http://corsair.flugmodellbau.de/files/elektron/NASA-II.PDF > > I have always taken it for granted that its known which is better, but > its seems the optimal charging scheme isn't settled. If you built > your own, how did you determine the frequency and pulse widths in > positive, if you use pulse, and discharge, if you use reflex. Among > pulse chargers I've sampled the pulse widths, and frequency all vary. > > > http://www.powerdesignersusa.com/pdf/Tech%20Brief%20Negative%20Pulse%20Charging%20Techniques%20Myths%20&%20Facts%20-%20Final.pdf > > I am looking for experiences with charging methods readers find > optimal and which charger you use. Most commercial chargers are > either constant current or pulse. > > http://www.batterylifeplus.com/images/PDFs/Nguyen_2003.pdf > > The few that support reflex charging are often costly, in the $300-400 > range. > > http://www.amainhobbies.com/product_info.php/products_id/145655/n/Bantam-E-Station-BC8DP-NiCad-NiMH-LiIo-LiPo-LiFe-Pb-AC-DC-Balancing-Charger > > http://www.westbourne-model.co.uk/fusion-l702b-pro-emperor-dc-charger-10306-0.html > > > More on charging methods: > > http://www.mpoweruk.com/chargers.htm#pulse Pulse charging and similar variable current charging schemes are primarily to de-sulphate LEAD ACID batteries (secondary use is proposed to reduce or prevent sulphation). It really does not matter much what one does or how it is done (vary current in a lead acid battery), the net desired result is to break up sulphation and return the insoluble products back to usable lead components. If sulphation is excessive, up to 100V per cell may be needed to push 10mA in either direction and it could be weeks of application of AC-cycling-plus-charging-DC to get the current up to hundreds of milliamps of current.
From: Robert Baer on 27 May 2010 04:15 Phil Allison wrote: > "Saturation is all Wet " > >> There are at 3 popular methods to recharge secondary batteries, and >> variations of these: > > > ** If one method was clearly superior for all cell types and circumstances - > there would be no other. > > You stupid trolling, fuckhead. > > FOAD. > > > > ...... Phil > > > Check,,that funnybusiness is for LEAD ACID batteries ONLY.
From: Robert Baer on 27 May 2010 04:16 ian field wrote: > "saturation" <gozum(a)n_o_s_p_a_m.n_o_s_p_a_m.ieee.org> wrote in message > news:sd-dnXGKItz1u2DWnZ2dnUVZ_oCdnZ2d(a)giganews.com... >> Wow, an honest question, and a warm welcome. Thanks for nothing. > > That's normal for Philthy, but if you keep top posting you'll get flamed by > a few more people. > > >>> "Saturation is all Wet " >>> >>>> There are at 3 popular methods to recharge secondary batteries, and >>>> variations of these: >>> >>> ** If one method was clearly superior for all cell types and circumstances >> - >>> there would be no other. >>> >>> You stupid trolling, fuckhead. >>> >>> FOAD. >>> >>> >>> >>> ...... Phil >>> >>> >>> >>> >> --------------------------------------- >> Posted through http://www.Electronics-Related.com > > ....gotta cook those hot dogs somehow..
From: ian field on 27 May 2010 10:39 "Robert Baer" <robertbaer(a)localnet.com> wrote in message news:NeCdnRH9BLxRtGPWnZ2dnUVZ_vqdnZ2d(a)posted.localnet... > Saturation wrote: >> There are at 3 popular methods to recharge secondary batteries, and >> variations of these: >> >> Constant current, or galvanostatic >> >> Pulse charging >> >> Burp or Reflex charging >> >> http://corsair.flugmodellbau.de/files/elektron/NASA-II.PDF >> >> I have always taken it for granted that its known which is better, but >> its seems the optimal charging scheme isn't settled. If you built >> your own, how did you determine the frequency and pulse widths in >> positive, if you use pulse, and discharge, if you use reflex. Among >> pulse chargers I've sampled the pulse widths, and frequency all vary. >> >> >> http://www.powerdesignersusa.com/pdf/Tech%20Brief%20Negative%20Pulse%20Charging%20Techniques%20Myths%20&%20Facts%20-%20Final.pdf >> >> I am looking for experiences with charging methods readers find >> optimal and which charger you use. Most commercial chargers are >> either constant current or pulse. >> >> http://www.batterylifeplus.com/images/PDFs/Nguyen_2003.pdf >> >> The few that support reflex charging are often costly, in the $300-400 >> range. >> >> http://www.amainhobbies.com/product_info.php/products_id/145655/n/Bantam-E-Station-BC8DP-NiCad-NiMH-LiIo-LiPo-LiFe-Pb-AC-DC-Balancing-Charger >> >> http://www.westbourne-model.co.uk/fusion-l702b-pro-emperor-dc-charger-10306-0.html >> >> >> More on charging methods: >> >> http://www.mpoweruk.com/chargers.htm#pulse > Pulse charging and similar variable current charging schemes are > primarily to de-sulphate LEAD ACID batteries (secondary use is proposed to > reduce or prevent sulphation). > It really does not matter much what one does or how it is done (vary > current in a lead acid battery), the net desired result is to break up > sulphation and return the insoluble products back to usable lead > components. > If sulphation is excessive, up to 100V per cell may be needed to push > 10mA in either direction and it could be weeks of application of > AC-cycling-plus-charging-DC to get the current up to hundreds of milliamps > of current. In the past I've livened up sulphated battery by connecting it to a bridge rectifier inserted in the neutral lead of low power load (such as a 100W 240V lightbulb) but since buying an Optimate battery conditioner, I've come to the conclusion that if the conditioning charger can't get it started the end result won't be worth the time and effort involved.
From: saturation on 27 May 2010 14:59
> >> Pulse charging and similar variable current charging schemes are >> primarily to de-sulphate LEAD ACID batteries (secondary use is proposed to >> reduce or prevent sulphation). >> It really does not matter much what one does or how it is done (vary >> current in a lead acid battery), the net desired result is to break up >> sulphation and return the insoluble products back to usable lead >> components. >> If sulphation is excessive, up to 100V per cell may be needed to push >> 10mA in either direction and it could be weeks of application of >> AC-cycling-plus-charging-DC to get the current up to hundreds of milliamps >> of current. > >In the past I've livened up sulphated battery by connecting it to a bridge >rectifier inserted in the neutral lead of low power load (such as a 100W >240V lightbulb) but since buying an Optimate battery conditioner, I've come >to the conclusion that if the conditioning charger can't get it started the >end result won't be worth the time and effort involved. > > Thanks folks, for you input. --------------------------------------- Posted through http://www.Electronics-Related.com |