Recent content by billvon

But "taking more than he gives" is not trolling. Lots of people take more than they give here (i.e. newbies.) Trolls are people who post intentionally inflammatory, incorrect or libelous material intentionally to make people angry, and I don't think he was doing that. He had some strong...

One that has saved (and extended) a lot of lives. But it's your (and your wife's) choice, of course.

It sure seemed like he was trying to get banned towards the end. But people change.

That's doable - but it is going to be hard to do it for less than $3000 unless you do most of the work yourself. 30mph average is going to take a LOT of energy, which means a large battery, which means $$. You could do the rest of the bike for around $1000 (BBS-HD or 2-3kW hub) but you are...

Maybe unban him first and see how it goes?

I would not design something that would overcharge a battery if you forget. Also, you need a device to generate the pilot signal so the J1772 will power up, like this: https://www.evwest.com/catalog/product_info.php?cPath=35&products_id=107&osCsid=cd4b1on6f8ri7o1g6i1787i400 And of course the...

Yikes, a lot to go through here. Yes, it can work. (We designed a charger for one of the early Ford EV projects using that system.) How it works is that you use one of the motor windings as the inductor in a buck converter. Since the current through the winding is sorta kinda like the...

OK, so the work will be untraceable but you can be convicted. Fair enough.

Undetectable? No. Untraceable? Yes. Unless you sign your work, no one is going to be able to figure out who worked on the bike.

Agreed. Relying on a BMS (or a buzzer) to stop a charge or a discharge is a bad, bad idea. Lithium ion batteries can go up in flames quite easily; have at least two methods of preventing overcharge and overdischarge (like a working BMS and a voltage limited charger.)

No, series. When they are in series, whatever discharge current one sees, the other will see. By definition. Two batteries in series will see exactly the same current - but voltage will not be forced to be the same. Two batteries in parallel will see exactly the same voltage - but current...

Just a note - if you have two of the same type packs in series you get an automatic guarantee that they are discharged at the same rate. Internal resistance doesn't matter.

Neither. He's playing the "redefine words to win the argument" game. It's a popular game to play when you are losing an argument. "Well, it depends on what the meaning of 'is' is."

Kumal Nayyar?

With 4 cells you need 5 connection points: Negative Top of cell 1 Top of cell 2 Top of cell 3 Positive Note in the picture there that you have 6 connection points.