On Thu, 5 Oct 2017 15:40:18 -0400, "Jim Wilkins"
wrote:
"Larry Jaques" wrote in message
.. .
On Thu, 5 Oct 2017 13:13:36 -0400, "Jim Wilkins"
wrote:
"Leon Fisk" wrote in message
news
Probably old news but I see in their latest monthly flier two new
battery chargers:
https://www.harborfreight.com/4-amp-...ner-63350.html
https://www.harborfreight.com/2815-a...ger-63299.html
They look interesting and I would probably get one if I didn't
already
have a similar CTEK Charger. The Maintenance mode isn't explained
for
either one. You would have to play with one to find out what it
does
while analyzing the output. I looked at all the comments and
didn't
find
anything there either. They claim to have a reconditioning mode
for
desulphating, but how it does this isn't explained...
The lovely CPU they refer to is likely a comparatively expensive one
(costing nearly $0.43, ah reckon.) compared to their
I'm trying to learn to quickly determine and sometimes improve the
condition of old and second-hand batteries with my home made
metered,
adjustable chargers and the HF carbon pile load. A commercial
charger
that doesn't display battery voltage and charging current won't help
me.
The first didn't show current and the second showed current OR
voltage, but not both onscreen. Feh!
This partly explains how, using a Harbor Freight manual charger and
a
Variac:
https://forums.goodsamclub.com/index...print/true.cfm
"The CONTROL that a VARIAC affords a transformer charger battery
charger makes the most "expensive" so called smart-charger
equalization mode a Marx Brothers farce. So-called smart chargers
cannot hope to accomplish what a human being can with a VARIAC,
battery charger, digital voltmeter and an accurate hydrometer."
Karl and Harpo? So, do you agree with him? If so, why do you
suppose
nobody had put out a good, adaptable, smart type of charger, at any
price? I don't see a whole lot of difference between cheap and
expensive plug-in chargers, and not much adaptability until you get
up
into the better solar controller smarts, but I'm just learning the
ropes, too.
My guess is that the suitable equipment is sold as "lab power
supplies" to those few of us who have learned how to use them to
properly charge batteries.
https://www.amazon.com/Lab-Power-Sup...node=318022011
I finally picked up a 0-30v/5a Chi lab supply a few years ago. Love
the current limiting. I haven't yet used it to charge a battery,
though.
http://batteryuniversity.com/learn/a...a_power_supply
This is what a Smart Charger can't do without help from a Smart User:
"Select the charge current according to battery size. For lead acid,
this is between 10 and 30 percent of the rated capacity."
"Once the battery is fully charged and the current has dropped to 3
percent of the rated Ah, the charge is completed."
Yes, smart chargers aren't.
The spec sheets and application notes for battery controller ICs
explain the problems they try to address.
http://www.ti.com/lsds/ti/power-mana...-overview.page
I was mainly concerned with the automatic management of industrial
Lithium batteries.
Yes, the BMS seems to be much better at 'smarts' for lithiums.
Evidently, though, BMSes aren't all they're said to be.
https://www.fullspectrumpower.com/bl...ithium-battery
--
However beautiful the strategy, you should occasionally look at the results.
-- Sir Winston Churchill