David Bowling's Continuous Charging Device

[Dbowling]

Update:
So far I have found thee kinds of batteries in my testing, which I have categorized by what happens when I put them in position number three.


1. When a good battery, no matter how low its voltage, is put in position number three, it's voltage jumps immediately to 24+ volts (when you read it with a volt meter from the positive to negative terminal) and the motor begins to run IMMEDIATELY. The voltage begins to drop down to around 13 or 14 volts, where it stabilizes.


2. Bad battery type 1. When it is put in position number three, its voltage  (when you read it with a volt meter from the positive to negative terminal) jumps immediately to 24+ volts, where it remains. I have left one of these in position number three overnight, with no noticeable change. I have found two of these so far. Even after being hooked up in the third position overnight, the voltage does not drop. The battery will also not take a charge from a standard charger after having been disconnected from the system.


3. Bad battery type 2. When it is put in position number three, its voltage  (when you read it with a volt meter from the positive to negative terminal) jumps immediately to 24+ volts. It slowly goes down to around 18 volts, at which time the motor comes on. Its voltage continues to go down to around 13 volts where it stabilizes. The motor continues to run. When removed from the system, this type battery will now take the charge of a conventional charger where before it WOULD NOT. I have found four batteries that meet this criteria. All my "bad" batteries were obtained from an auto parts store where they had been taken in as "core" replacements for new batteries because the auto parts store had determined they were "bad" batteries and sold someone a new battery. I myself tried charging them with two different standard chargers and they would not charge.


4. The criteria I am looking for. When you connect the battery in position number three, the voltage jumps to 24+ volts and begins to go slowly down. At 18 volts the motor comes on and the motor continues to run and the voltage continues to drop. When the voltage reaches 8 or 9 volts, the motor shuts off and the voltage once again jumps to 24+ volts and the cycle repeats. I will continue to check batteries until I find one that meets these criteria. Then the fun will begin.

[FatBird]

Thank you for sharing your results David.

Can you please post the motor name plate stats, like Voltage Rating, Current Rating, RPM Rating, etc.

Thank you sir.


.

[Dbowling]

When I actually had a working system, there are two different motors we used


Fisher Price 12 volt
00968-9003
63822
3E3312 47
It came fro a Fisher Price Power Wheels toy and those are the only markings on it.


The second motor had the following markings


CIM
First Robotics
FR801-001
12Vdc
101104


The motor I am using now, which I THOUGHT was 12 volt DC until you asked your question and I went down to look at it has the following markings


McMillan Electric Company
PM DC Motor
Model S344633401 (the "S" may be an 8..the first "3" may be an 8.... the second "3" may be an 8 or a 2) It is pretty scratched up
P/N 12-0057
26.4 amps


I am not sure that anything about the motor matters except that it is a brushed DC motor.
5020 Rpm
110 Vdc
3HP


I still haven't found a battery to go in the third position that will take a charge but not hold it. This is what I am searching for because I believe it is the KEY to the whole thing.

[Dbowling]

A friend of mine APPEARS to be having success with a battery in the third position that is bad but does NOT meet the criteria of dropping in voltage on its own by putting a load on it consisting of a small lightbulb from an auto dome light. I will be trying to replicate what he has done tomorrow while I continue to search for a battery that meets my requirements for the battery in the third position. He's putting together a setup right now to do extensive testing, and I'll keep on posting here.

[Dbowling]

I have had a VERY frustrating day today. Every battery, no matter how bad, that I put in the third position causes the motor to either start right up, or never lets the motor come on at all. I can't find one that will just sit there and increase in charge and THEN the motor starts, no matter how much I drain the battery prior to trying to use it. Even the two I had the other day no longer will do this and are now taking a charge from a standard charger. They are now "good" batteries! Grrrr!!!I am out of bad batteries to try and will have to go on the hunt for some tomorrow. Can't wait for tomorrow!!!!