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BQ34Z100-G1: BQ34Z100-G1

Javier Gutierrez Jimenez
Intellectual 360 points
Part Number: BQ34Z100-G1

Hi,

I am using a BQ34z100-g1 with an LiFePO4.

I have two Golden Image for two packs with different capacity, one for an 8S1P-3200mAh pack and another for an 8S2P-6400mAh pack, both using the same Chemical Cell.

I have many boards programmed with a 8S1P 3200mAh Golden Image, bot now I need to use those boards with 8S2P 6400mAh battery, my doubt is:  If in those boards I change in the parameters values  of  Qmax, Capacity Design and Ra table to values  of my  6,4Ah Golden Image, could I use the 6.4Ah batteries correctly in those cards?  or is it necessary to program the boards with the full 6.4Ah Golden Image from battery Studio. 

In my production, it is very easy for me to change BQ parameters through I2C  from my Microcontroler  but it is more difficult for me to program the Full golden image from Battery Studio.

Thanks in advanced.

Best regards

  • 0
    TI__Genius 12215 points

    Hi

        I think It should be workable, for the batteries with same chemical ID, these are the parameters that could vary from pack to pack. My suggestion is to make a line to line comparison with two gg files so as to find all other possible discrepancies between the two template files.

        Please be noted that the IT Enable command should be sent after these modification are done

  • 0 in reply to Steven Yao
    Intellectual 360 points

    Hi Steven

    Thanks for you answer.

    I have compared the GG file of parameters of the 3.2Ah golden image and the 6,4Ah golden image. The parameters with different values are:

    Parameter

    Value at 3,2Ah G.I.

    Value at 6,4Ah G.I

    CC Threshold

    2880

    5700

    Design Capacity

    3200

    6400

    Design Energy

    10240

    20480

    Design Resistance

    104

    69

    Qmax Cell 0

    3279

    6790

    Cell V at Chg Term

    3433

    3437

    Avg I Last Run

    -452

    -890

    Avg P Last Run

    -145

    -285

    Ra01

    100

    65

    Ra02

    100

    65

    Ra03

    76

    56

    Ra04

    91

    62

    Ra05

    104

    69

    Ra06

    115

    73

    Ra07

    95

    62

    Ra07

    111

    72

    Ra08

    121

    79

    Ra09

    125

    89

    Ra10

    131

    86

    Ra11

    265

    90

    Ra12

    285

    252

    Ra13

    490

    429

    Ra14

    5241

    4598

     

    I think that if I change these parameters from vaule of 3,2Ah G.I. to the value of 6,4Ah G.I  the operation of BQ will be correct for a bat teryof 6,4Ah (Both with the same Chemistry). What do you think? In you last post you say that “it should be workable”. I need to know for sure if this change is correct at 100%.  Could you ensure this question?

    Thanks in advanced.

    Best regards

  • 0 in reply to Javier Gutierrez Jimenez
    TI__Genius 12215 points

    Hi, Javier

        In theory, it is workable.

        But please verify below items and in advance:

        1: The gg file for 6400mAh battery has been tested good.

        2: The QEN bit should be clear before programming the new data to the target device.

        3: When programming the data, the device should be in relax mode.

        4: Enable IT and do a learning cycle after the new parameters are programmed