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Battery charger multiple chemistry and multi-cell

jp_electric
Prodigy 155 points
Other Parts Discussed in Thread: BQ34Z100, BQ2013H

Hello,

I am looking for battery chargers and monitor (Gas Gauge) for nimh and life-po. The battery is multi-cell. Rather, the unity for monitor i want in separate module.

If a TI don't have this module set you can help me find in separate modules?

  • 0
    TI__Guru 73830 points

    Jo,

    Could you answer a few questions to help with our recommendation?

    1) Do you want a gauge that can support NiMH or LiFePO4, but we can change parameters to fine tune the design for each chemistry?

    2) How many series cells are you planning to use?

    3) Do you prefer Impedance Track or CEDV or does it matter in your application?

    4) What is the design capacity range of your cells?

    Thanks, 

    Tom

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    1) Yes we can change the parameters on a specified gauge of battery.

    2) 10 x cells NiMH 1.2V 3/4 x cells LiFePO4

    3) I don't know you say with Impedance Track or CEDV but i think that you are refereing the end of charge detection. For the NiMH the best method it's dT/dt or -dV/dt.

    4) 4600Ah (NiMH) Max Charge current 3A

    I forgot to say  that modules are to connect a uC.

    thanks for your reply!

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    Thomas,

    Can you help me?

    Thanks!

  • 0 in reply to jp_electric
    TI__Guru 73830 points

    Jo,

    Here are some comments to your questions.

    1) Yes we can change the parameters on a specified gauge of battery.

    (You will need to use the bq34z100 for LiFePO4 cells and the bq34z120 for the NiMH cells. The Impedance Track algorithm has been customized to to fit each of these cell chemistry's.)

    2) 10 x cells NiMH 1.2V 3/4 x cells LiFePO4

    (These devices can support a 10S or a 3S to 4S configuration.)

    3) I don't know you say with Impedance Track or CEDV but i think that you are refereing the end of charge detection. For the NiMH the best method it's dT/dt or -dV/dt.

    (IT and CEDV are two different gauging algorithms. IT is a more sophisticated algorithm that monitors the pack votlage and uses an OCV table and other parameters to calculate capacity. It also uses coulomb counting to report the state of charge during charge and dicharge. CEDV uses coulomb counting to report the state of charge during charge and discharge. It requires a deeper discharge to update FCC and fine tune the pack capacity. Both algorithms will adjust the capacity with changes in the load current and temperature. This is a very simple explanation and you can find more details in our applications materials.)

    4) 4600Ah (NiMH) Max Charge current 3A

    (This is okay.)

    Best regards
    Tom

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    Hello, Tom!

    You can send-me a datasheet of bq34z120? I not find on the internet.  Just this  user guide http://www.ti.com/lit/ug/sluuac4/sluuac4.pdf

    The comunication beetwen uC and bq34z120 and beetwen uc and bq34z100 for I2C it's equal? memory registor, frames of comunication,..., 


    You know if exist charger for this batterys? I want a IC that charge any chermistry and talk with uC.

    Thanks

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    Thomas,

    Can you help me?

    Thanks!

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    Tom, can you help me?????? please

    You can send-me a datasheet of bq34z120? I not find on the internet.  Just this  user guide http://www.ti.com/lit/ug/sluuac4/sluuac4.pdf

    The comunication beetwen uC and bq34z120 and beetwen uc and bq34z100 for I2C it's equal? memory registor, frames of comunication,..., 

    You know if exist charger for this batterys? I want a IC that charge any chermistry and talk with uC.

    Thanks

  • 0 in reply to jp_electric
    TI__Guru 73830 points

    Jo,

    Please provide your email address and what company that you work for and I will send the bq34z120 datasheet to you. The communications interface will be the same as the interface on used on the bq34z100.

    You should post you charger questions to the Battery Management  - Charger forum as they can provide better advice for the charger question. We typically work with CC/CV type chargers and these cover most cell chemistry's.

    Regards
    Tom

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    Tom,

    Can you send me samples too?

    Thank you!

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    Tom,

    You have news for BQ34Z120. Is finished? You can send samples?

    Regards

  • 0 in reply to jp_electric
    TI__Guru 73830 points

    The device has not completed the release process, so I do not have samples to send. The EVM has already been released and you can order it from the TI website.

  • 0 in reply to ThomasCosby
    Prodigy 155 points

    You don't have any date for completed the release process? It's very important for me!!!! You said that would be finished until 2014!!!

    I believed in your work, in your "word"!!

  • 0 in reply to jp_electric
    Prodigy 140 points

    Hello,

    Has there been an update to the release of the BQ34z120 since the beginning of the year?
    Would I be able to get a data sheet/ samples /  EVM for this product?

    We are using the BQ2013h currently but it does have general functionality issues and the software is limited to Windows XP.

    Regards

    Aaron

  • 0 in reply to Aaron Burnie
    TI__Guru 73830 points

    Aaron,

    We are not releasing the bq34z120, but will incorporate NiMH support into the bq34z100. This updated device is scheduled to release in February 2015.

    Tom