On Fri, 01 Apr 2016 20:15:07 -0700, John Larkin Gave us:
Some that are taken to zero cannot be recovered, and that is actually usually the case. Deep cycle marine, etc. batteries are more tolerant.
But for the most part, one should not allow it to happen.
It isn't designed for zero volts detection. It is designed to prevent some fool from connecting it backwards, and causing the battery to boil over or even explode. Have you ever seen the damage cause by a battery explosion under the hood of a car? I have. You can't flush all of the acid out, so over time it cause a lot of rust, and it weakens the steel, if it is in contact for very long.
Early car battery chargers were just a light bulb in series with a rectifier that was lugged into a 110 volt outlet. No protection from electrocution, at all. They were quickly removed from the market, because they caused a lot of battery damage, and injured enough people to be declared unsafe. My battery charger is home brewed. I bought a new surplus battery eliminator for motorhome, and a 10A variac. I mounted them into the aluminum case that was from a scrapped W.W.II RADAR receiver. I built it while I was in in high school, and it is still working, over 45 years later. I can set it to any initial charge current, and I can plug it into a timer if I won't be right there while it charges. It isn't pretty, but it is very reliable.
The parts-store electronic chargers are switchmode and reverse protected. And current limited. And won't put current into a dead battery. That has to be by design, which could be deliberate design or very stupid design.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
I didn't discharge the battery on purpose.
It worked fine for another year, when I sold the car.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
Den 30/03/2016 kl. 22.07 skrev Jim Thompson:
The best charger is this:
CTEK Battery Chargers Are Trusted by Top Brands:
But be very careful when connecting a power source to your car. The car electronics do not like power glitches.
The foreign accumulator should be activated "slowly with e.g. Power MOSFETs.
How about a home made Jumpstart accumulator consisting of four M1A 3,2Ah A123system cells with heavy duty wires and connectors?:
A123 Worlds Smallest VS. "Strongest" 12V Jumpstart battery:
"Wrong question?"
Choose LiFePO4-accumulators instead with UnderVoltage-cut-off - I admit that they are expensive:
Mar 24, 2014, NEC to buy A123 battery systems unit from China's Wanxiang:
Bases in USA:
A123Systems - this is for the M1-cell:
September 2008, Phenomenal positive revealing Sandia-test:
..."
PERFORMANCE OF PHOSPHATE LITHIUM-ION BATTERIES IN MOTIVE APPLICATIONS
LiFePO4-accumulators are secure compared to standard Li-ion:
Nail penetration testing A123 Li-ion:
September 21, 2008, LiFePO4 Batteries: A Breakthrough For Electric Vehicles:
Standard Li-Ion:
Exploding Laptops on Good Morning America:
Nail penetration testing Standard Li-ion:
Modify Li-Po Battery Nail Penetration Test:
Lithium Polymer Battery Explosion's (liposack):
Lead-acid accumulators are not designed to be used:
Standard lead-acid accumulators works for 50-100 full cycles:
with respect to the depth of discharge is:
-
Have not seen these LiFePO4-accumulators yet:
11 March 2009 Lithium batteries charge ahead. Researchers demonstrate cells that can power up in seconds:br,
Glenn
The design I built (from a kit, into a standard Arlec 4A charger) doesn't activate the charger until it sees some voltage on the output (from the battery). I forget how it does that, but I recall it was quite a cleverly simple design. I have the schematic on paper somewhere.
Den 02/04/2016 kl. 18.57 skrev Glenn: ...
Please note that the a123systems starter battery has built-in BMS with among other Under-Voltage cutoff - but if you have some extra power drain plugged in your car - you should put yet another Under-Voltage cutoff that saves 1-30% of the starter battery capacity.
...
Quote: "... Smart on-board battery management system (BMS) electronics report real-time data and diagnostics to protect the battery and prevent premature failures, reducing service and warranty costs. The integrated BMS provides cell balancing and protection as well as built-in system-level safety features for under/over voltage cutoff, overcharge and over temperature protection. ..."
Oh - did I forgot to mention that LiFePO4 do not contain lead :-)
br,
Glenn
[snip]
Since I know battery charging temperature behavior rather well (see my patents), maybe I should just roll my own with 100mA capability ;-) ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
The touchstone of liberalism is intolerance
OK...
In that case - make your own Bluetooth 4.x/BLE enabled OBD (
Then you can hook up your normal charger for some hours. (send email again when charged...)
Do you have many cars, since the car battery can happen to be totally discharged?
Glenn
Just two vehicles, an Infiniti Q45 and a Nissan Frontier Pick-em-up.
The car gets driven every day or three. The truck hasn't been driven since early December ;-) ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
The touchstone of liberalism is intolerance
...
Please note that the charger tests your battery and signals if it is faulty - even when the battery is car connected. Lead-acid fails from time to time. The charger is reverse polarity protected [ idiot proof :-) ]:
-
Please note: I have no shares in CTEK - yet...
Glenn
plus a transistor and a few resistors, it comes in DIP so it would be quick to do on a stripboard
feed it from an old laptop charger, they are commonly 19V
-Lasse
I think it's deliberate, so you can't hurt yourself by shorting the thing - lawyers, and all that. It can be quite annoying.
Automotive power is about the glitchiest power you can find. Car electronics is quite well protected.
That's not a feature, it's a bug.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
Just go the solar panel route. My Moms car is a candidate, so I just ordered a 2.4W Schumacher. I'll see how that turns out, it's on the north side of the house and dosent get much sun in the winter so I might have to go back to running it once a month.
Cheers
I generally avoid anything that "smells leftist", but Arizona doesn't do daylight-savings because we have enough sun already... so maybe I'll try that out ;-) ...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
The touchstone of liberalism is intolerance
Well, that free 1 hour of sunlight dosen't do much up here.
;D
Cheers
Yeah, they left the "d" out of Aridzona.
Sorry, I'm a little late to the party. BatteryMINDer gets my vote.
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