I will soon be reconditioning my Prius battery and will take it out of the car to do so. That means, I will need to power the battery fan externally with a 12V power supply. Luckily, I have a spare Prius 12V battery laying around and it's putting out 12.5V consistently. 1. Is it okay to use this battery to power the fan? 2. What are the specs on the fan power connector? I would like to put together a harness that goes from the battery to the fan connector. Do they make any specific connectors on the battery end for applications like this? I found a video which suggests a frequency meter is needed to select fan speed on later generation Prii. I assume Gen 3 does not have such a function and the fan runs at a constant speed. Correct?
Most people just put a big shot v Fan over the rack. I thought. At least that's what I see at my buddies set up wer he does this like production . 18 inch fan above table the racks are on wen charging in singles or complete racks of modules . And it's conditioned space the shop is .
Or you could find a Gen2 Prius cooling fan at the junk yard... It will run straight off a 12v power supply. @ChapmanF pointed out the Gen3 wiring for the cooling fan on here once, but I don't remember what he said?
Yes I saw a couple of videos with that setup. But I feel like the factory cooling mechanism is much better at this.
@ChapmanF can explain better, but a gen2 fan is just two wires and gen3 fan is three wires so it's more complicated than a simple + and - connection to get the fan to run.
Gotcha. Sorry I just realized that you said Gen 2. Even if I went that route, I would then have to swap in the new fan in place and swap it out when I am done reconditioning. Does 3 pins mean the option to control the speed?
You're going to have to have the fan attached and all the duct work for cooling . All has to be removed to reaccess. The table fan notta. And uhhh big cfms more air from 18 incher with nothing fitted . And it's winter in many garages !
To prevent the slow degradation of module capacity, I do a once a year deep discharge of the entire pack, in the car. The cardboard box, along with a small fan, keeps the pack completely cold.
rj showed the wiring for the gen 3 fan. That SI0 terminal is for speed control, via a pulse train, with the property that the more time the pulse train stays low, the faster the fan. So just tying SI0 to ground, as the "Bench Test while Disconnected from Harness" drawing shows, is enough to run the fan at high speed.
