I never assume a power source has a current limit that is low enough that the heat created by that current is inside the tolerance of the insulation design. The supply very well might self limit the current, but I don't know that to be true. If you know the internal resistance of the battery and the voltage different, you can calculate the approx amp draw.I’m also confused by this. As far as I’m aware when the battery cells reach 14.1v the power draw should taper off.
In real life this is a 1000 watt power supply for a computer, meant to supply a computer of less than 1000 watt load. As soon as you go to re-apply it to a new task, you take on the responsibility of making sure it will fit properly to the task. It surely has some type of self protection. Because I don't know what that is nor how it works, I will make sure I don't overload it.
About it getting hot without proper ventalation, I have not used it yet. Since mine has adjustable output voltage, I can bring it down close to the battery voltage and I should be able to manage the current by reducing the voltage different. I am about ready to start some testing.