3 Battery Generating System

[Turion]

LifePo4

LifePo4 batteries, because they accept the charge so much better than a standard battery seem to charge just fine with a stock motor running between them. So they seem to take the charge at ANY frequency and charge even without the higher voltage. SO FAR By higher voltage I mean two sides with different voltages will equalize without the losses to impedance you see in lead acid batteries, so it LOOKS like you don’t always have to have 2.5 volts over the battery standing voltage to get it to charge correctly.

I only have one LifePo4 12 volt battery. But it is composed of 6 two volt cells. This lets me run a three battery system using four cells on one side for 8 volts and two cells on the other side for 4 volts, which gives me a 4 volt potential difference I can run a VERY small dc motor on. Because of their cost, I wanted to invest a little time playing with them before spending the money on several batteries. So far I really like what I see.

[bistander]

LiFePO4

...
I only have one LifePo4 12 volt battery. But it is composed of 6 two volt cells. This lets me run a three battery system using four cells on one side for 8 volts and two cells on the other side for 4 volts, which gives me a 4 volt potential difference I can run a VERY small dc motor on. Because of their cost, I wanted to invest a little time playing with them before spending the money on several batteries. So far I really like what I see.

LiFePO4 (Lithium Iron Phosphate) cells are considered to operate with a nominal voltage of 3.2 V/cell. Recommend end of charge is 3.65 V/cell. Typically 4 of these cells are used in series for a 12 V battery when replacing 12V lead acid batteries.

They shouldn't be allowed to discharge below 2.0 V/cell. Of the various types of Lithium Ion cells, LiFePO4 is about the safest, but also perhaps one of the most difficult to properly manage in multicell batteries. They can easily be damaged and rendered useless, and occasionally catch fire. I've seen a few incidents.

Be careful. Have a bucket 1/3 full of sand for a smoking or flaming cell. You can't put a Lithium fire out, but you can save your house.

bi

[Turion]

[bistander]

No photo

That may be typical, but it is not what I have. As you can see from the photo, six cells, not four, so the voltages per cell are different from your specs. ...

Interesting. I see no photo. Please post it or link to a spec/sales page for your battery. Thanks. bi

[Turion]

Ohoto

Here is the photo. This picture is when I first took it apart and realized I would have to remove all the electronics to use it in the single battery circuit I showed here. Right now it is broken down even further. But at least this shows it is made up of six cells as I said. Got it on Amazon. Don’t believe anything there indicated six cells.

https://www.amazon.com/gp/aw/d/B07BHW61MG?psc=1&ref=ppx_pop_mob_b_asin_title

I have to say bi, this is why you drive me crazy. I have this battery sitting in front of me. I KNOW it is six cells, yet you come here and quote something out of some book and base all your opinions on that rather than what is actually on the bench. Have you been lied to all your life so you can’t trust anything anybody says? Why would I bother to lie about how many cells my battery has, or is it that you just can’t wrap your head around the fact that things can be different from something you read somewhere?

And by the way, MOST of the LifePo4 batteries you see for sale on line are in the shape of a rectangle, not a square, which leads me to believe they have more cells in one direction than the other. In other words I would tend to believe MOST of the ones for sale are composed of six cells, unless, of course, they are square in shape.

[bistander]

6 cells not

https://www.amazon.com/gp/aw/d/B07BHW61MG?psc=1&ref=ppx_pop_mob_b_asin_title

Hi Turion,

Thanks for posting the photo.



What you have is a 12 cell battery in a 3p4s configuration, meaning 3 cells in parallel and 4 of those wired in series. Likely consisting of standard 26650 cells, 26mm dia x 65mm long. Functionally behaving as a 4 in series battery but at 3 times the capacity of a single cell.

You can clearly see, in the photo, bus bars spot welded to the ends of 3 cells on the positive putting those 3 cells in parallel and similarly, on the negative.

Regards,

bi

edit: You said

quote something out of some book

. I didn't quote anything. I stated fact that I have learned from years of study and hands-on experience. When I do quote someone, I try to always indicate such.

[Pot head]

[Turion]

[bistander]

Info

The 12 volt, 7.2 amp high discharge rate hour LiFePO4 (Lithium Iron Phosphate) battery is designed to be a drop in replacement for standard sealed lead acid batteries in UPS, alarm, and other similar applications

Quote from Amazon link provided by Turion. And the electronics packaged in the battery is the BMS, Battery Management System. You'd be hard pressed to find a commercial product with Lithium battery which doesn't have a BMS or sometimes called a PCM, from cell phones to power tools to electric cars. The BMS protects the Lithium cells from overcharge and undercharge and also equalizes the cells, as well as often communicating with the charger, other batteries or the operating system. BMSs can range from basic (somewhat simple) to very complex.

bi

[Turion]

Video

https://www.youtube.com/watch?time_continue=307&v=ludLU4_6ZD

werjefelt
Magnetic neutralization

[ewizard]

Turion, thanks for all your continued research and work. Link for the video in your last post says "video unavailable".

[thaelin]

I would suggest using the 18650 3.7 volt Lion batts that have the attached button. This will allow you to charge them correctly and to also shut them down if they fall below the safe level. A bit spendy but worth it in safety. This addon may be the thing that saves you from a fire. In addition to not being able to put them out, the fumes from it are also very toxic. Just not something you want to be closed in with. Great W/kg rating but dangerous if not used in the prescribed way. This is never going to be a safe way. Vent the bat pack outside and in a fire proof container for your peace of mind.

T, you are a never ending source of info and ideas. Keep up the good work. I follow you close.

[Turion]

Coils

wizard,
Sorry, the owner took it down. Was good info.

Here is a video on coils I did this morning trying to explain for those who still do not understand.

https://youtu.be/eiJqLo0XY84

[Netica]

Ferrite Core

Hi Turion,

As you have explained regarding the different types of core materials being different in their ability and time to take up magnetism and become magnetic. Have you ever successfully used ferrite and been able to produce the speed up effect?

[Turion]

Cores

I have enough ferrite powder of the required kind to do an entire set of coils as well as Metglass for same. Have NOT tested them yet.