That sounds good. Yes, the battery can handle it, its multiples in a series-parallel pack.
I can drop the voltage to about 24 V, and use this resistor I found on the net?
You also need a circuit to detect "low battery" when a cell voltage has dropped to 3.2V then it disconnects the load. If you discharge a cell to below about 3.2V then it is permanently ruined and might catch on fire if you try to recharge it.
You also need a circuit to detect "low battery" when a cell voltage has dropped to 3.2V then it disconnects the load. If you discharge a cell to below about 3.2V then it is permanently ruined and might catch on fire if you try to recharge it.
But the voltage of a fully charged Lithium cell drops in the first 30 seconds of a heavy load then it levels off. Usually the power of a cell is measured and recorded at 30 seconds.
But the voltage of a fully charged Lithium cell drops in the first 30 seconds of a heavy load then it levels off. Usually the power of a cell is measured and recorded at 30 seconds.
Yes, to prevent an explosion and a very hot fire you must limit the discharge current and shut it off when each cell's voltage drops below 3.2V.
The capacity of the Lithium battery cells are not exactly the same so the one with the lowest capacity will reach 3.2V and drop lower first. Therefore the voltage of each series cell or group of parallel cells must be separately monitored.
Just like the battery pack in your laptop, each individual cell has to be monitored for good health. Series parallel combination brings in additional difficulties (one fellow may driver another fellow that has fallen sick on the way). Some cells come with individual electronics (mounted on the bottom- negative terminal: these cells are longer by about 1mm) that prevent overcharging or deep discharge.