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Re: supercap leakage

Cross-posted to 2 groups.

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On a sunny day (Thu, 25 May 2017 08:32:12 -0700) it happened John Larkin
<jjlarkin@highlandtechnology.com> wrote in
<96udicd921blfhqj744ho2aoguc9hvrg5n@4ax.com>:

>On Thu, 25 May 2017 15:27:49 GMT, Jan Panteltje
><pNa0nStpealmtje@yahoo.com> wrote:

>>Indeed, lipos will just go up in voltage if over charged.
>>The 'equalizers' are sometimes just a parellel load system,
>>like a zener, per cell, preventng the cell from going over 4.2 V.
>>That way everything gets charged.
>
>Zeners protect them in the reverse direction, too.

Real zeners would, although with -.7 or so volts I would not want to use those cells again...
But usually you are talking about several amps charge current,
and like Tim posted here some year ago,
a transistor with a voltage sensor shorting out / limiting the voltage can be used.
If it was a MOSFET with a reverse body diode, yes.
Would have to be a logic level type that works far below 4.2 V Vgs on.
Bipolar is nice here.
No GHz :-)

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supercap leakage John Larkin <jjlarkin@highland_snip_technology.com> - 2017-05-24 14:34 -0700
  Re: supercap leakage Helmut Wabnig <hwabnig@.- --- -.dotat> - 2017-05-25 07:10 +0200
    Re: supercap leakage rickman <gnuarm@gmail.com> - 2017-05-25 01:30 -0400
    Re: supercap leakage John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-24 22:53 -0700
      Re: supercap leakage o pere o <me@somewhere.net> - 2017-05-25 09:36 +0200
        Re: supercap leakage o pere o <me@somewhere.net> - 2017-05-25 09:40 +0200
          Re: supercap leakage Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-05-25 09:20 -0400
          Re: supercap leakage John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-25 07:18 -0700
        Re: supercap leakage Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 07:51 +0000
      Re: supercap leakage "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-05-25 08:16 -0500
        Re: supercap leakage John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-25 07:20 -0700
        Re: supercap leakage rickman <gnuarm@gmail.com> - 2017-05-25 11:29 -0400
          Re: supercap leakage Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 16:41 +0000
      Re: supercap leakage Robert Baer <robertbaer@localnet.com> - 2017-05-25 23:57 -0800
        Re: supercap leakage amdx <nojunk@knology.net> - 2017-05-26 07:55 -0500
          Re: supercap leakage John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-26 07:24 -0700
  Re: supercap leakage Chris Jones <lugnut808@spam.yahoo.com> - 2017-05-26 00:30 +1000
    Re: supercap leakage John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-25 08:23 -0700
      Re: supercap leakage Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 15:27 +0000
        Re: supercap leakage John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-25 08:32 -0700
          Re: supercap leakage Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 16:22 +0000

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