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ContinuousWave: Whaler Repairs/Mods
Trickle Charger Problem
|Author||Topic: Trickle Charger Problem|
posted 01-17-2002 03:15 PM ET (US)
My trickle charger caught on fire. No power was hooked up to the charger but it was hooked up to both batteries at the time. It burned the [wires] from the batteries back to the charger on both batteries. The charger itself is toast and smuted up my 22 outrage. Neadless to say my whole boat could have been toast also. Any ideas on what could have gone wrong? The charger was hooked up correctly and had been on the boat for a year or so.
posted 01-17-2002 09:17 PM ET (US)
What happened was that something failed and there was no fuse in the charger line. Had there been a fuse, it would have failed and protected the wiring and boat.
One possibility is that the trickle charger suffered a meltdown that amounted to a short.
Another possibility is a voltage differential
If you have two batteries you need one of the following:
- Two trickle chargers
- A trickle charger built for two batteries
- A switch so you only charge one battery at a time
And a fuse.
posted 01-18-2002 08:49 AM ET (US)
Chuck's analysis is excellent. A fuse in each line would may have prevented this.
Any AC operated battery charger has a transformer winding and rectifiers. If the rectifiers fail in such a way that they become shorted (as opposed to open), then current from the battery can flow back to the charger and through the low DC resistance of the transformer winding. This would be the equivalent of placing a short across the battery.
If you still have the charger, check the rectifiers. Probably two of them are shorted. If so, that is the likely culprit.
Chuck's theory of the shorted cell in one battery is also a very good hypothesis. You might check the terminal voltage on the two batteries and see how they compare after charging.
posted 01-18-2002 11:33 AM ET (US)
good info guys. the trickel charger was made to charge both batteries with seperate leads going to each. the leads did not come from the factory however with in line fuses. neadless to say i am out of the trickel charge business. both batteries seem fine. i will test them though. tks
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