http://leadacidbatterydesulfation.yuku.com/topic/1121/t/Peak-pulse-voltage-wire-position-dependant.html en-us Copyright 2006, Yuku feeds@yuku.com (FeedMaster) webmaster@yuku.com (WebMaster) Sat, 28 Feb 2009 09:13:23 GMT Sun, 15 Mar 2009 15:17:11 GMT Yuku Feeds 1.0 http://blogs.law.harvard.edu/tech/rss 60 http://static.yuku.com//feed/bypass/images/button-yuku.png http://leadacidbatterydesulfation.yuku.com/topic/1121/t/Peak-pulse-voltage-wire-position-dependant.html Yuku - free hosted forums and profiles 88 31 {pics-1.1 "http://www.icra.org/ratingsv02.html" l gen true for "http://yuku.com" r (nz 1 vz 1 lz 1 oz 1 cz 1 ) "http://www.rsac.org/ratingsv01.html" l gen true for "http://yuku.com" r (n 0 s 0 v 0 l 0 )) Search Domain q http://yuku.com/search/direct/ http://leadacidbatterydesulfation.yuku.com/reply/3953/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3953 feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3953 Sun, 15 Mar 2009 15:17:10 GMT http://leadacidbatterydesulfation.yuku.com/reply/3948/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3948 feeds@yuku.com (NavyTrained) http://leadacidbatterydesulfation.yuku.com/sreply/3948 Thu, 12 Mar 2009 18:34:02 GMT http://leadacidbatterydesulfation.yuku.com/reply/3947/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3947 (when you have nothing to lose)


Lift battery about 2 inches and drop. The mechanical jolt can sometimes undo internal shorts ]]> feeds@yuku.com (emsvitil) http://leadacidbatterydesulfation.yuku.com/sreply/3947 Thu, 12 Mar 2009 14:53:07 GMT http://leadacidbatterydesulfation.yuku.com/reply/3946/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3946 unfortuantely the battery is sealed, so I can't just drain the acid. I would have to drill first. And I think it's a little too much. I should stick to shorts.
My only concern is the possible damage to the battery. I mean, the wire I use is really thick, If I keep it attached for too long, could I destroy the internal connections between the cells? Or maybe the battery will blow in my face rather than melt the connections? I... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3946 Thu, 12 Mar 2009 12:36:41 GMT http://leadacidbatterydesulfation.yuku.com/reply/3945/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3945
If using high voltage to create a large DISCHARGE current flow in the battery, it is best to use a large circuit breaker or remote knife switch to Make the connection.

Succesful burning may require that the batt be drained in order that the shorting dendrites are not water cooled by the electrolyte. ]]> feeds@yuku.com (desulfator2) http://leadacidbatterydesulfation.yuku.com/sreply/3945 Wed, 11 Mar 2009 22:10:05 GMT http://leadacidbatterydesulfation.yuku.com/reply/3942/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3942 There's still one more thing. One of my little chargers (now I know it's a float charger) outputs a steady 13,9v at its leads (when... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3942 Wed, 11 Mar 2009 03:12:24 GMT http://leadacidbatterydesulfation.yuku.com/reply/3941/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3941
(basically because it's an old multi-voltage PC switch power supply, and when 14 volts is selected it comes out at 14.15)

With wet-cells I can run 15 (15.15) and it works faster (just add water)


When there's a possibility of a weak cell or they aren't balanced (weak, different discharge rates....) I think the trickle level of voltage (13.6-13.8 ) excaberates the problem......

At the lower... ]]> feeds@yuku.com (emsvitil) http://leadacidbatterydesulfation.yuku.com/sreply/3941 Tue, 10 Mar 2009 21:45:04 GMT http://leadacidbatterydesulfation.yuku.com/reply/3940/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3940
Many chargers are Constant Voltage which emulate the Automotive Charging System (14.4 Volts) via the Alternator. Their maximum output voltage is about 14 Volts and is simply the rectified output of a 12 Volt / 10 Ampere transformer. 12 Volts AC will produce rectfied pulses of 14 Volts peak amplitude. This will enable the charger to supply relatively high current (several Amperes) when the battery is discharged, then as the battery charges and its... ]]> feeds@yuku.com (NavyTrained) http://leadacidbatterydesulfation.yuku.com/sreply/3940 Tue, 10 Mar 2009 18:09:18 GMT http://leadacidbatterydesulfation.yuku.com/reply/3939/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3939 Could you please be so kind and define trickle charging for me? I've seen a thousand definitions over the web, none of them are the same.
As far as I'm concerned, a 1 amp trickle charger is a 13,8v stabilized voltage source capable of max 1 amp. When battery draw is more than 1 amp, voltage drops in order to decrease current draw. This is what I know as trickle charging. This is the kind of charging required for equalization, as it... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3939 Tue, 10 Mar 2009 05:10:31 GMT http://leadacidbatterydesulfation.yuku.com/reply/3938/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3938
With a battery in 'good' condition it is necessary to perform what is known as an 'equalizing charge' periodically in order for all of the cells to reach full charge. This can be done with a trickle charger at approximately 1 Ampere for 8 to 10 hours. The gassing during an equalizing charge should be very slow.

When pulsing the battery with a desulfator, with trickle charger attached, you'll do both simultaneously; desulfate and equalize.... ]]> feeds@yuku.com (NavyTrained) http://leadacidbatterydesulfation.yuku.com/sreply/3938 Mon, 09 Mar 2009 21:49:34 GMT http://leadacidbatterydesulfation.yuku.com/reply/3936/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3936

@emsvitil: Do you think I should "trickle" charge the battery with... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3936 Sat, 07 Mar 2009 03:16:44 GMT http://leadacidbatterydesulfation.yuku.com/reply/3935/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3935
I think one of the cells is weaker.......... (mainly because I missed the 10.50 cutoff once, and the discharge rate leveled off with a slope similiar to the initial slope at 10 volts)

Anyway, I've found that keeping the voltage up seems to help with discharge time.

I think the higher voltage is working away at the weak cell, which doesn't happen if you drop down to trickle... ]]> feeds@yuku.com (emsvitil) http://leadacidbatterydesulfation.yuku.com/sreply/3935 Sat, 07 Mar 2009 00:21:51 GMT http://leadacidbatterydesulfation.yuku.com/reply/3932/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3932
It is going to take some time for the sulfation to be fully converted. While desulfating batteries I make measurements of battery voltage once each week. The charge/discharge cycles can be very beneficial but don't expect to see any noticeable difference in the discharge curve for some time yet.

It's good to have several desulfators to be able to work with a few batteries at the same time. Then you can let the batteries that are slow to respond receive... ]]> feeds@yuku.com (NavyTrained) http://leadacidbatterydesulfation.yuku.com/sreply/3932 Fri, 06 Mar 2009 17:51:25 GMT http://leadacidbatterydesulfation.yuku.com/reply/3930/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3930 So, the first charging step is constant current 0,5 amp (or 1.0 amp) until battery voltage climbs to 14,4 (2,40v per cell). The second step is constant voltage at 14,4 until the currents drops to... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3930 Fri, 06 Mar 2009 13:12:54 GMT http://leadacidbatterydesulfation.yuku.com/reply/3929/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3929
A higher voltage might help (but keep it below 14.4) ]]> feeds@yuku.com (emsvitil) http://leadacidbatterydesulfation.yuku.com/sreply/3929 Fri, 06 Mar 2009 03:40:51 GMT http://leadacidbatterydesulfation.yuku.com/reply/3924/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3924 In fact the only test I was able to make went bad.
The battery is a BOSCH SILVER starter battery, rated 95Ah and 850CCA. The battery was produced on January 2006, so it's not very old. It was kept chronically discharged as it... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/sreply/3924 Mon, 02 Mar 2009 10:04:18 GMT http://leadacidbatterydesulfation.yuku.com/reply/3923/t/Peak-pulse-voltage-wire-position-dependant.html#reply-3923
It's more important to note that the pulse peaks are greater than the battery voltage; as the pulses do their work over time and the battery begins to respond things will stabilize.

Just monitor the battery voltage as it's being desulfated and you'll see changes which will indicate how well the battery is... ]]> feeds@yuku.com (NavyTrained) http://leadacidbatterydesulfation.yuku.com/sreply/3923 Sun, 01 Mar 2009 20:45:52 GMT http://leadacidbatterydesulfation.yuku.com/topic/1121/t/Peak-pulse-voltage-wire-position-dependant.html To start, I bought a desulfator kit and I assembled it. It works perfectly as the led lights up, the board buzzes and a nice peak is seen with a scope. The candidates are some of my old age/abused starter batteries.
Anyway, all of them are sealed so I can't measure SG. I must rely only on the peak pulse voltage and max charging voltage in order to check the desufation... ]]> feeds@yuku.com (Laurentiu) http://leadacidbatterydesulfation.yuku.com/topic/1121 Sat, 28 Feb 2009 09:13:23 GMT