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BQ34Z100-R2:

Ankit Ahlawat
Prodigy 110 points
Part Number: BQ34Z100-R2

Tool/software:

Hi sir,

I am using bq34z100-r2 , sealed acid battery 12v  7Ah.What is the importance of the terminate voltage?

Design capacity - 7000mAh

Design voltage -> 5000mV by using the volt scale as 2

Number of cells -> 6

Design Energy -> 8400mWh

Tapper current ->100mA

Discharge current threshold -> 60mA

Charge current threshold -> 75mA

Quit current -> 40mA


I am not able to get the terminate voltage in my battery management studio instead I have got Cell terminate voltage.

Is both are the same?

I have kept the Cell terminate voltage to 2000mV .Whenever I start to discharge the battery up to 5000mV it will be discharging correctly. After when it reaches 5000mV it will drastically decreases to 0mV.Is it normal or if it wrong then what maybe the potential reasons for this drastic decrease in voltage ? what are the solutions for this problem?

Please reply as soon as possible.

Thank you

Tejas

  • 0
    TI__Mastermind 26395 points

    Hello Ankit,

    -The importance of terminate voltage especially for sealed acid battery is that if you go below the termination voltage than it can lead to damaging the cell and reducing the lifespan due to sulfation.

    -Termination voltage and cell terminate voltages is indeed the same. 

    -Yes if you set your terminate voltage to 2000mV it will indeed discharge the battery at 5000mV and once it reaches 2000mV than it would stop discharging. When your battery reaches 5000mV and decrease to 0mV can/can't be considered normal and this is heavily dependent on the cell. For most 12V lead-acid battery the termination voltage is 10.5V and if you below it especially at 5V than it wouldn't be considered uncommon for it to decrease to 0V. However this question wouldn't be a Texas instruments battery gauge question rather understanding what is the acceptable range for your battery to work at and than implementing those parameters.

    Thank you,
    Alan 

  • 0 in reply to Alan Frias
    Prodigy 110 points

    Thank you

    Alan

  • 0 in reply to Ankit Ahlawat
    TI__Mastermind 26395 points

    Hello Ankit,

    Thank you for the response and no need to follow up on this message.

    Thank you,
    Alan