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CHEM ID选择时,放电电流大小

Other Parts Discussed in Thread: BQ34Z100

hi,TI的工程师好,

我看资料要求,要0.1C的电流放电,直到截至电压,请问,是否一定要用0.1C,如果用0.2C是否会有影响。

  • 实际操作中都用的0.2C,0.1C放电周期太长。

  • 建议还是按照0.1C来做。

  • 你好,非常感谢您的答复。

    我目前上传LOG后,未获取到匹配的CHEM ID,麻烦帮我看下LOG 的告警

     Warning: First OCVpoint has non-zero current I=  -0.064 Please make sure you have a 2 hr relaxation period before the beginning of discharge.

    Warning: Last OCVpoint has non-zero current I=  -0.064 Please make sure you have a 5 hr relaxation period after the end of discharge.

    Warning: difference between initial and final DOD is less than 90% dDOD_%=  71 Try to decrease the discharge rate

    Warning: difference between initial and final DOD is less than 90% dDOD_%=  71 Try to decrease the discharge rate

    * Warning: All IDs disqualified because of too high resistance deviation. No suitable ID selection available

    另静置时,我板子是有耗电的,这块是否会有影响;

    其次我是按照0.2C来放电

  • 从告警信息看,你的log数据并不是从0电流开始的。而且你的放电数据也不是从充满开始到放空

  • 数据上修改一下,将静置的时候,采样到的漏电流0.0064改成0。

    另外电流电压的单位是mA, mV , 相应的确认下单位是否对。

    充电要满充到0.01C 截至,

    放电最好到电池的空,一般是3V

  • 你好,非常感谢您的回复,我目前又重新做了一次充放电过程.

    芯片:bq34z100,电池:12V 12Ah的铅酸电池,按照充电,静置,放电(外接10欧的电阻放电,放电到6.5V),静置过程。上传LOG后,报警如下,相关LOG和上传文件见附件。请帮忙看下,非常感谢。

    Best chemical ID : 437 Best chemical ID max. deviation, % : 29.35

    Accuracy Error: Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recomended format, units and test schedule

    bq34z100.zip