Help creating a electronic circuit

[Nagarok]

I want to create a project which involves about 5 Peltier cooling units run off a battery.
The problem is, I have no clue what type, or the specifications of the battery.

The cooling units run between 0-15V and 0-9A.

I want this circuit to be able to run at maximum capacity continuously for an hour or longer would be good, but in reality it would probably be using between a fifth to half capacity. I was planning on limiting the circuit using electronic controllers to turn the dc current into a pulse, so one time unit on, four time units off as an example, and increase the pulse time when the need for extra cooling comes into play.

Another note, this should hopefully be portable and compact.
A challenge for you all.

 

[Vailanor]

The first step in this project would be to determine the total power requirement for the system. This can be calculated by multiplying the voltage and amperage requirements of each Peltier unit. Once you have determined the total power requirement, you can then determine the type and size of battery needed to power the system. For example, if your total power requirement is 135 watts, you would need a battery that can supply at least 10.4 Amps (135W / 13V = 10.4A). Next, you will need to consider the size, weight, and portability of the system. In order to keep the system small and lightweight, you may decide to go with a lithium-ion battery. These types of batteries come in a variety of sizes and capacities, and are capable of delivering high currents. Finally, you will need to consider the electronic controllers that will be used to regulate the current. Depending on the complexity of the circuit, you may need to look into using multiple controllers, or a single controller that is capable of regulating multiple Peltier units simultaneously. By considering all of these factors, you should be able to come up with a suitable solution for your project. Good luck!