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帮忙选一个磷酸铁锂电池的电量计

jingheng wang
Prodigy 20 points
Other Parts Discussed in Thread: BQ34Z100-G1, BQ40Z50-R2, BQ4050

hi TI team，

我们有个项目，用到了一个磷酸铁锂电池（3串应用，每个电芯3.2V，总电压为9.6V，截止电压为7.5V）

TI的同事建议我们用 BQ40Z50-R2，但是这个芯片需要将每个电芯都接到芯片上，这样就增加了电池pack的出线数量。

我在TI网站上也找了其他的电量计型号，比如bq34z100-G1，只需要接电池pack的正负极即可。

请TI的同事,是否能提供一个芯片型号，只需要接电池pack的正负极，同时性能表现也很好，并且其他客户也应用过磷酸铁锂项目。

对于我们的磷酸铁锂项目，是否有更合适的芯片推荐、

谢谢

  • 0
    Prodigy 20 points

    Hi TI team,

     I want to select a  battery  fuel gauges chip for LiFePO4 （3 Series battery，each cell voltage is 3.2V,so the battery pack voltage is 9.6V,and EOL voltage is 7.5V）,

    In the TI.COM ,I find the BQ40Z50-R2 which is recommended by TI colleague，there are some question :

    1, Has a customer used it in LiFePO4 battery project? 

    2,How about its performance？

    3，BQ40Z50-R2 must connect each cell (For the 3 Series battery,It need 3 lines  connect  to the BQ40Z50-R2 ), But I find the bq34z100-G1 which just connect the pack- and pack+. 

    4，Is there a more suitable device for our project? I want connection more simpler（like bq34z100-G1）,and Better performance.

    thanks 

  • 0
    TI__Guru*** 130456 points
    铁锂电池因为平坦区特别宽，阻抗跟踪算法的性能可能不是很理想的。
    您可以考虑用BQ4050, CEDV算法的芯片, BQ34Z100-G1 需要搭AFE使用.