HV battery fan control and temperature monitoring apps for iOS

Dr Prius on IOS will control your fan based on temperature and give you the battery temps as long as you have it running. But it does not have coolant temp. If you have an android option you like, I would buy a cheap version and mount it.

 

Yea... So frustrating when people build an app for Android and not IOS. At same time, tech industry app makers more often than not build apps for IOS first then Android, which is frustrating because Android has a way bigger market share than IOS and many apps never get enough interest to justify expanding to Android.

I've found the Dr. Prius version of fan control to be problematic and and Hybrid Assistant's way of doing much more efficient.

Alternatively @SFO has in his signature line (or at least he used to) about how to program your fan to run full blast without needing an app.

 

It's here:
Gen2 Prius: Custom PIDs for Torque (Android App) with formulas | Page 24 | PriusChat

 

You still need an app or scanner constantly writing the fan commands. Otherwise the car's normal control takes over.

 

Dr Prius does have a fan control override in the special features menu, and it lets you disable the reverse beeping. Fan control only works when it's open though.

Battery temp and voltage are available in car scanner but you have to dig through the sensors to find them and add them to dashboard. I just picked the middle tb2 to monitor cause it's usually the warmest. These are just demo modes random numbers so don't panic.

 

May you explain why is Dr. Prius fan control problematic? in what way? may you please explain?

 

Dr Prius fan control only works with the app open and on the screen. If you drive Uber, for example, the Dr Prius fan control control will disengage when Uber navigation is on the screen. Or when you get a phone call. Or text. Or look for a podcast to listen to.

 

I see, then what you recommend aside from Dr. Prius to control the fan speed? do you use any other app?

 

I don’t know of another way to control fan speed with an iOS device. If I go back to Uber driving I might control the fan with iPad and do Uber app with iPhone.

 

If you still have an old andriod phone( no active Sim needed) you can download hybrid assistant via your home wifi and it will work. I currently use such a setup as my onboard fan control does not work at all.


Frank

 

Your onboard fan control?

 

There is a product that directly plugs into the HV fan but it is expensive.

So no app needed with this device.

Also the website seems to be down.

I was never able to get communication with the owner even when the website was working.

 

@AzusaPrius yeah I couldn't find that site either, but I did finf a new resource while looking for that site and checking all the cooling fan pics on the search page. check out Toyotatech and they have a free signup for their General Automotive tech service.

https://automotivetechinfo.com/wp-content/uploads/2022/05/Diagnosing-Prius-Hybrid-Battery-Pack.pdf

 

Does it runs the fan at full speed all the time?

 

I think it ramps it up same way as OEM would but sooner, not constantly.

I could be wrong but I remember something like that was on the website.

 

Here is some info on it.

 

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35° C seems too hot for the battery, especially in hot climates like where i live, if that module basses its readings by the data it gets from the center of the battery pack which is where it gets hotter and takes longer to get cooled down, then it might be good, but if it uses the temperature readings from the 3 battery temperature sensors, the center of the back is going to stay significantly hotter than the other 2 sides. I use Dr. Prius to run the fan at max speed all the time, with A/C on high, otherwise the battery will be always in the 38° C / 40° C +, which is bad for longevity of the modules.

 

Actually that is perfect temp for the battery which is 95F anywhere from 80-100F is good.