What is the current of this current output of this circuit?
- Thread starter No0bert
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Andrew Cowan
Senior Member
The max current is whatever the 24AH batteries can provide.
Note however, that they will all discharge at the same rate. When the 24AH batteries reach a lowish voltage, and they have been dishacharged, the larger batteries may still have 31AH left. However, continuing to use the circuit will over discharge and damage the 24AH batteries.
There is nopoint in doing this, it is only added cost and weight.
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Note however, that they will all discharge at the same rate. When the 24AH batteries reach a lowish voltage, and they have been dishacharged, the larger batteries may still have 31AH left. However, continuing to use the circuit will over discharge and damage the 24AH batteries.
There is nopoint in doing this, it is only added cost and weight.
A
BeanieBots
Moderator
The current (as pointed out by Andrew) will be determined by your load and Ohm's Law.
I=72/Zload
Did you mean to ask "what is the capacity?"
The capacity of a string of batteries in series is whatever the lowest one is.
In your case that would be 24AH so the larger ones are just wasted.
Not a clever thing to do
It's an accident waiting to happen
I=72/Zload
Did you mean to ask "what is the capacity?"
The capacity of a string of batteries in series is whatever the lowest one is.
In your case that would be 24AH so the larger ones are just wasted.
Not a clever thing to do
It's an accident waiting to happen
Andrew Cowan
Senior Member
Looking up the max current for a 24AH battery = 300A cold cranking (means for a short time - about 30 seconds, without dropping below 10.5V).
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westaust55
Moderator
As indicated by Andrew, the 24Ah batteries will fully discharge first (at which time others are partially discharged).
If you try to keep drawing current from the full set, the larger batteries will still provide power and force a curent through the smaller batteries.
This will totally flatten the 24Ah batteries. When the cell voltage falls below about 1 volt, there is a prospect that the polarity of one or more cells in the smaller batteries can reverse. This causes irreparable damage to the cell and can pose a safety hazard as BB has intimated.
If you try to keep drawing current from the full set, the larger batteries will still provide power and force a curent through the smaller batteries.
This will totally flatten the 24Ah batteries. When the cell voltage falls below about 1 volt, there is a prospect that the polarity of one or more cells in the smaller batteries can reverse. This causes irreparable damage to the cell and can pose a safety hazard as BB has intimated.
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