This is the first time I ask on the Electrical Engineering site of Stack Exchange, please feel free to dismember my question.
Please take into account: I am thinking about the hypothetical ideal case (100% efficiency, no energy loss) and the voltages and currents stated here are hypothetical values. If there are implications on the specific voltages (like types of batteries, or anything else) I would really appreciate if you let me know in your answer.
Let's say I have the following requirements regarding power for an electrical application that I am developing:
- 2.5V DC
- 1000A (all the time, not peak).
- Portable. Duration of the battery: 1 hour
In an ideal world I would buy a 2.5V 1000Ah battery and it would be fine. However, imagine that I found a 5V 500Ah battery (and can provide 500A continuously). My assumption is, if I downregulate the voltage to 1V, it will be able to provide higher amperage at the outside of the regulating circuit (while not surpassing the previous power output which was 5V*500A = 2500 W).
My doubts are:
- How would you regulate the voltage? I am pretty sure a voltage divider won't do the trick, and I guess a voltage regulator would work, but with such high amperage I am not sure about the limitations, I have little experience with power supply circuits.
- With that solution, if the voltage is halved, would the amperage at the output of the regulating circuit be doubled? (that means, I could use the 5V 500Ah voltage source). Again, on "ideal" components. I understand there would be energy loss.
Thanks in advance!