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I've been charging EV's for clients for 18 years. Recommending and installing the gear to get the job done. Just my experience and opinion here. Manufactures spec their components to beat the competitions components. So specs are more often than not generous in the direction that OEM buyers...

I have a prototype cooling blower mounted in my car and two charges monitored with it. First let's review. First all of, the numbers are are based on my 80F ambient charging environment. It is reasonable to use these numbers adding or subtracting as needed depending on your ambient charging...

Yes over current is caused by over voltage with a resistor (or less common, resistance value drifting out of spec). Over current results in overheating which damages the resistor. So overheating without over current will achieve the same cracked ceramic resistor. Aerowhatt

For completeness I went back and compared E mode and B mode on the same stretch of road. Take note that this was a different day and conditions were different than the conditions in the graphics in the previous post. In the previous post there was a pretty decent headwind. In the following...

Thanks coulomb, there is an "attachments" below the submit. I will have to give it a try and see what happens. Really though how hard would it be to include a little generic guidance with the "upgrade" confirmation message? Aerowhatt P.S. it does work. A bit cumbersome to figure out but it...

Yeah I will sleep better knowing that :roll: . Tacky red letters for gold members?? Yeah that makes sense! Aerowhatt

I don't use QCDC very much. Just don't need to in general. Recently I did use a different one than I had in the past. Same unit but a different location. The one I used to use occasionally has been out of order for 6-7 months (really). The old one would deliver 125amps this other one seems to...

I would like to be. So far all I have gotten for trying to have my photos stay with the forum by being a paid subscriber is my handle in ugly red letters. Oh and I do have a 250 message PM box now, which is the feature that I don't need at all. I don't know about anyone else but I hate reading...

I put 50 CFM worth of blower airflow through the condenser and radiator from the front. After an hour the coolant temperature stabilized down ~9F to 104.4. Removing the motor bay hood there was a lot of really hot air trapped in there. Feeling the inverter it was still too hot to hold on any...

Sure enough, Siai47's information is correct yet again. I moved my remote temp sensor to the return line of the coolant loop a few inches from the connection to the coolant tank in the back of the car. Under L2 charge it peaked at 113F or 33F above ambient. So we are cooling the components with...

The radiator fan has two speeds. The low one is very unobtrusive and almost unnoticeable. I noticed it inside the garage with the AC on medium. It will come on to cool the AC condenser periodically. This fan speed would be perfect for getting the job done without using a bunch of power or making...

So I had hooked up a remote sensor to the charger top plate last night and had a lot of driving this morning. On the road the unit working as only the DC to DC with all that air flowing around from motion only runs 3 or 4 degrees F above the ambient temperature. Charging on L1 at 12 amps it...

I have a long history with air cooling components on EVs. The Charger is a perfect candidate because it sits high in the bay where heat rises and becomes trapped. While the car is moving there is plenty of airflow, but when parked there would be very little. A finned heat sink on the cover...

I agree with you that as long as the car sits the imbalance could be internal discharge. However if you think about it, one cell out of 80 or 88 is a red flag. Cell compatibility is pretty important to these high voltage packs. So it's always going to be an issue in this pack. You should be...

Thanks for the tip on scrolling with the i909! I will have to give that a try. I think I have the balancing algorithm figured out (key word is "think") It looks to me like the voltage set point is where the balancers of cells at or above that voltage turn on. Either the set point rises when any...

The balancers do dump only a small portion of the charging current which makes a larger imbalance less likely to quickly be remedied. There are a couple of ways to improve your odds. As near as I have been able to tell (with the I-909 scanner) balancing starts at 75% or 80% SOC during the...

You are probably right, but it might be interesting anyway. I'm trying to remember the liquid coolant flow pattern as it does pick up heat along the way. If I'm remembering right it comes back from the radiator to the charger/DC to DC then goes to the inverter and then the motor. If so, then the...

I thought of a quantitative test for this best gear choices for the hypermiling debate. Using a well known stretch of highway, I used canion to compare two back to back (as identical as possible) runs. One using D and N as needed and the other leaving the car in B the whole time. Both runs I...

An interesting question, factors work both ways. Lower power levels on L1. But much less up time for the charger on L2 Perhaps if everyone with a failure could give their most common charge voltage, a pattern will emerge. Aerowhatt