Tesla EVSE on a prius

Yeah, they pay me... Seriously. I have a Honda pack and racing packs from Mitsubishi just shipped to us. This is part of what we do, and are the best in the world for it.

Correct.

False.

You can charge the pack as a single unit.

You do a constant current charging algorithm while monitoring the pack voltage. That tells you quite a bit. And there is no reason why you can't monitor the cell voltages while charging to have alerts.

A broken CAPS LOCK button doesn't excuse your ignorance of lithium batteries and doesn't give you the right to spew fear and misinformation. If you are the leading source on lithium chemistry then I would guess the automakers would be banging down your door and not on the company I work for.

 

"False.

You can charge the pack as a single unit.

You do a constant current charging algorithm while monitoring the pack voltage. That tells you quite a bit. And there is no reason why you can't monitor the cell voltages while charging to have alerts.

A broken CAPS LOCK button doesn't excuse your ignorance of lithium batteries and doesn't give you the right to spew fear and misinformation. If you are the leading source on lithium chemistry then I would guess the automakers would be banging down your door and not on the company I work for."

Of course you can do as you say but you cannot do it with 100% safety. Cell failures are totally unpredictable but fortunately rare. I'm sure Boeing spent plenty on BMS hardware but they have had a fire on one of their airplanes, these cells are known fire hazards when overcharged and monitoring only total pack voltage invites overcharge should any cell fail shorted.
I hope it never comes about but If someone here were to follow your advice and caused a fire and injury this email thread may be enough to win a very substantial judgement against you. Do me a favor and show this thread to your boss, I'll look for you in the unemployment office.

 

You really have no idea what you are talking about.

Cell failures are actually extremely predictable except for random physical damage (like a spike going through the case while driving down the road...) Charging cells while monitoring each cell cannot be done with "100% safety" either. 100% is a magical number that is impossible to achieve.

If a cell fails shorted you will immediately detect it because your constant current source will droop. If a cell fails open, you will immediately detect it because your string is disconnected.

If you are actually an engineer, you seriously need to revisit the circuits classroom.

 

And, of course the BRUSA charger you've suggested as all that's needed does this kind of monitoring.. LOL

The great lawyer will easily get the theft of intellectual property dismissed since there isn't any thing intellectual involved, pure stupidity.

 

No, you assumed all of that. Incorrectly.

The point is that the Brusa chargers can be setup as "boosters". Basically all it does is have a current sensor on the output of the stock charger. When current is flowing out, the stock charger is operational and babying the individual cells. All the booster does is provide an additional jolt to the cells. As far as I know, nobody has tried this on the Prius. However based off of how Toyota does its charging circuits, it should work.

 

Guys your both wrong, and here's proof.......... Chrysler was way ahead of the curve,

 

I don't think so. You can full charge the battery in about half an hour going down out of the mountains. It charges a that rate on a regular basis for any reasonable downhill. The external charger rate is what is reasonable to expect from 110/220 volt circuits. The could add a fast charger which might make sense if they go to a larger battery.

 

This NOT AT ALL what you previously suggested and has potential of safely working, but several details need to be verified by experiments.
Some of the questions that'll need answers are:
1. Does the OEM charger control software limit charge current? If not the added curent can flow through the OEM sensor.
2. How does the OEM charger control respond if added charging current is fed directly to the battery, by-passing the current sensor?