Spoofing 10S lifep04 BMS to work on 9S Lion cells ?

[Gab]

Since I have a few spare 10 Series 3.3v Lifp04 cells Dewalt 36v and I want to use some new 3.7 V lion cells that need to charge up to 4.2v each.
Can I spoof the BMS, by using 9 cells only and then somehow altering the BMS wires to let the voltage to go above 3.6v per cells ?

The BMS currently tops out at 36v i.e 3.6v per cell. But I need the cells to charge to 4.1 or 4.2v to get full Capacity with the new Lion cells. Hence why I can remove 1 cell and make it 9 series.

Is their a way to fool the BMS wires though ? i.e maybe put the spare sense wire onto another cell ? so 1 cell has 2 sense wires and hence a voltage.

Then the only problem is maybe the BMS will cutout when the cells get to 3.6v ? or will it only cutout when the whole pack gets to 36v before it looks at the BMS wires max voltage?

 

[parabellum]

Buy LiIo BMS. LiFePo BMS will kill your LiIo. BMS's cell level protection will not let charge over 3.6V/cell and let over discharge LiIo's.

 

[Gab]

The cells I want to use are not LIPO, so LVC is fine a 2.5v. The main problem is I need to use only 9 series not 10 series to get 36v like lifp04. And this means each cell has to charge to4.2v not 3.6v. Their is no chance to damage the cells, the only problem I see is I won't get full capacity if only charge to 3.6v per cell, so hence need a way to fool the BMS ?

 

[Wishes]

The cells I want to use are not LIPO, so LVC is fine a 2.5v. The main problem is I need to use only 9 series not 10 series to get 36v like lifp04. And this means each cell has to charge to4.2v not 3.6v. Their is no chance to damage the cells, the only problem I see is I won't get full capacity if only charge to 3.6v per cell, so hence need a way to fool the BMS ?

There is no way to trick the BMS like you are referring too. No safe way at least.

You cannot fool it to think it has 10s and really put 9s. And the low voltage cut off, and high voltage cut off are on a per cell basis and not with the total voltage of the whole pack.

If you did any of the things you suggested and if you actually managed to get it to work, which it won't, you would be bypassing all the security functions of your BMS making it useless. Might as well remove it and run the cells unprotected or get a proper lilo BMS board. They are not expensive.

Wishes

 

[parabellum]

The cells I want to use are not LIPO, so LVC is fine a 2.5v. The main problem is I need to use only 9 series not 10 series to get 36v like lifp04. And this means each cell has to charge to4.2v not 3.6v. Their is no chance to damage the cells, the only problem I see is I won't get full capacity if only charge to 3.6v per cell, so hence need a way to fool the BMS ?

Any link to those cells?