Here?s my situation.
About two years ago I installed two additional 6V batteries in one of the coach basement storage bays. They are in a closed (not really sealed) box that is passively vented to the outside. (two inch hose through a hole)
I have always wanted some sort of a fan system to assist in venting the gases and toxic fumes from the box while charging, but didn?t want a totally manual operation nor did I want a fan that would run all the time. Hence, my latest brain fart.
In the process of solving a recent problem, I was forced to learn how my coach charging system really works. It was during this process that I discovered the ?smarts? involved with the use of the isolation/aux start solenoid to charge either battery from the charging source of the other. Quite simple really, but it struck me as ingenious.
I concluded that the output of this,?smart?, voltage sensing circuit (see attachment #1) meets the above stated requirements for my little project. I still have some questions of loading, current capacity, fusing, etc?
So far, here is where I stand: (See attachment #2 for scope of project)
I have three 12vdc muffin fans to select from. They have current ratings of (.12) to (.2) amps. No info on CFM or RPM. They are all brushless motors.
I need to select a fuse size for the proposed circuit. ?
Where to install the relay (near the source or near the batteries)?
Do I need to be concerned about sparks or igniting gases with brushless fan motors?
Do I even need any of this?
Etc, etc
Comments anyone?
About two years ago I installed two additional 6V batteries in one of the coach basement storage bays. They are in a closed (not really sealed) box that is passively vented to the outside. (two inch hose through a hole)
I have always wanted some sort of a fan system to assist in venting the gases and toxic fumes from the box while charging, but didn?t want a totally manual operation nor did I want a fan that would run all the time. Hence, my latest brain fart.
In the process of solving a recent problem, I was forced to learn how my coach charging system really works. It was during this process that I discovered the ?smarts? involved with the use of the isolation/aux start solenoid to charge either battery from the charging source of the other. Quite simple really, but it struck me as ingenious.
I concluded that the output of this,?smart?, voltage sensing circuit (see attachment #1) meets the above stated requirements for my little project. I still have some questions of loading, current capacity, fusing, etc?
So far, here is where I stand: (See attachment #2 for scope of project)
I have three 12vdc muffin fans to select from. They have current ratings of (.12) to (.2) amps. No info on CFM or RPM. They are all brushless motors.
I need to select a fuse size for the proposed circuit. ?
Where to install the relay (near the source or near the batteries)?
Do I need to be concerned about sparks or igniting gases with brushless fan motors?
Do I even need any of this?
Etc, etc
Comments anyone?
