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BQ76952EVM: Connecting 3 cells

Part Number: BQ76952EVM

Hi, 

I intend to connect only three cells to the BQ76952EVM evaluation board. 

I see that minimum of three cells are to be connected to the board. 

So, if I have three cells- Cell A, B and C. My connection would be as follows - 

Cell A (-ve) to BAT- (J4.6)
Cell A (+ve) / Cell B (-ve) to CELL1 (J4.5)
Cell B (+ve) / Cell C (-ve) to CELL2 (J4.4)
Cell C (+ve) to CELL16 (J1.1)

1. I have removed all the shunts from cell simulator pins (J14 and J23) since I am using the actual battery cells. Please let me know if I am right.

2. Should I also be shorting the pins (J1.1,2,3,4,5) to (J3.1,2,3,4,5) and (J4.1,2,3,4) or leave them open? 

  • Hi Prashaant,

    You should remove the cell simulator shunts corresponding to the cell connects that do not have a cell connected across them.  Additionally, you are correct that you should short the unused cell input pins.

    Here is an example of reducing the cell count from 16S to 10S.  The blue wires are shorting the unused cell connect inputs.

    Finally, you need to set the Settings:Configuration:Vcell mode register to correctly reflect which cell inputs are connected or you may see CUV alert errors.

    For further instructions on using actual battery cells with the BQ76952EVM and reducing the cell count, please see sections 4.5 and 4.6 in the EVM user guide (BQ76952EVM User's Guide (Rev. A) (ti.com)).

    Best,

    Andria