Ok so here it is. It's time to replace the battery in my truck and I want to do something a little different. There are video's on Youtube where capacitors are used for the start power. I know it will work but they also have an issue where they discharge and have issues when an alarm is in play due to constant discharge. The way around that is to setup a hybrid system where the capacitor bank is tied in with a battery, this way the caps can provide the starting power but the battery provides the power to keep everything running. So my thought is to use a deep cycle battery that can handle being drained down a bit more over time.
The issue that comes into play is the capacitors can take a fast charge and discharge rate and likely pull too much from a battery. So what do I need to do to limit the charge and discharge rate of the battery? Most of the people I have seen do this just use a cheap 20 dollar 12V battery and ignore it which is an option but if I am working on my truck and have the radio on that will be an issue, a deep cycle battery however will be able to supply power for a while longer and since my plan is to mount it in the bed of my truck size is not an issue there. The caps will be able to do the starting and other high power draws without issue. But drawing big loads like starting off a deep cycle battery will end up killing it fast so I want to limit the current that can be pushed into or pulled out of the battery.
Using a combination of some capacitors as well as a deep cycle battery should allow me to have both the ability to start the vehicle as well as draw power over time and have a long lasting battery if I can limit the current draw on the deep cycle. I am just having a hard time finding the information on what I need to do to make this work and not limit voltage. I am hoping to figure something fairly simple out as well and right now my google fu is off and so is my brain.
The issue that comes into play is the capacitors can take a fast charge and discharge rate and likely pull too much from a battery. So what do I need to do to limit the charge and discharge rate of the battery? Most of the people I have seen do this just use a cheap 20 dollar 12V battery and ignore it which is an option but if I am working on my truck and have the radio on that will be an issue, a deep cycle battery however will be able to supply power for a while longer and since my plan is to mount it in the bed of my truck size is not an issue there. The caps will be able to do the starting and other high power draws without issue. But drawing big loads like starting off a deep cycle battery will end up killing it fast so I want to limit the current that can be pushed into or pulled out of the battery.
Using a combination of some capacitors as well as a deep cycle battery should allow me to have both the ability to start the vehicle as well as draw power over time and have a long lasting battery if I can limit the current draw on the deep cycle. I am just having a hard time finding the information on what I need to do to make this work and not limit voltage. I am hoping to figure something fairly simple out as well and right now my google fu is off and so is my brain.