Battery troubleshooting help, please?
This regards one of my elderly 90aH gel cells in my shave ice machine. Though old, they have been performing awesomely. Possibly until now? There are 2 12v batteries running a 24v motor. I'll ca...
Forum Discussion
When a battery voltage is raised to 14.X volts, and the amps taper to small numbers quickly while still being held at 14.x volts, either the battery is fully charged or very close to it, or it is very sulfated, or both.
Now if the charging source drops to a lower voltage, well it requires less amperage to hold the battery at a lower voltage.
Restarting a smart charger over and over on a nearly fully charged battery is going to be confusing to both human and charger.
Put a fairly significant load on the battery, wait for voltage to drop to 12.6 or less, then restart charger, then quickly remove load. This will allow the 'Smart' charger to at least seek 14.x volts.
How long it holds 14.x volts is an issue, as many smart chargers hold it for only 2 hours, and 4 is usually needed on a deeply cycled battery.
I have a 40 amp charging source, Apply this to my 90 AH battery depleted 18AH to 72AH is exactly 80% charged.
I have never applied this 40 amp charging source and been able to get amps to taper to less than 0.4a at 14.4 to 14.7v, in less than 3.5 hours from 80% charged.
But but but... its a 40 amp charging source and only needed to replace 18 AH. LEad acid batteries..... wasting amps and charge time and losing capacity, since day one.
Now if the charging source drops to a lower voltage, well it requires less amperage to hold the battery at a lower voltage.
Restarting a smart charger over and over on a nearly fully charged battery is going to be confusing to both human and charger.
Put a fairly significant load on the battery, wait for voltage to drop to 12.6 or less, then restart charger, then quickly remove load. This will allow the 'Smart' charger to at least seek 14.x volts.
How long it holds 14.x volts is an issue, as many smart chargers hold it for only 2 hours, and 4 is usually needed on a deeply cycled battery.
I have a 40 amp charging source, Apply this to my 90 AH battery depleted 18AH to 72AH is exactly 80% charged.
I have never applied this 40 amp charging source and been able to get amps to taper to less than 0.4a at 14.4 to 14.7v, in less than 3.5 hours from 80% charged.
But but but... its a 40 amp charging source and only needed to replace 18 AH. LEad acid batteries..... wasting amps and charge time and losing capacity, since day one.
