BQ4050: BQ4050在低温-20℃，放不到soc=0,是否可以调节TC值，目前此值是0 ，需要怎么调？

您好，低温需要多做几个循环因为需要根据负载和温度（但不能低于-20C）调整EDV2/1电压，以缓解SOC跳变。

The bq4050 uses CEDV, which relies on accurate learned FCC with qualified discharges. See 6.3 in the TRM for details. A qualified discharge to update FCC has, among other rules, a limit on temperature, which is 11.9C by default. A battery will have vastly reduced capacity at -20C and depending on the load, FCC can be significantly less than FCC that was learned above 11.9C. Therefore it is possible that the gauge will calculate incorrect SOC at -20C because it will use FCC that is too high for this temperature. There is a limitation of the CEDV algorithm.

If you observe a jump in SOC at room temperature then the previously learned FCC is not indicative of the conditions that were present. For example, the load may have increased. That's why it is important for the gauge to learn FCC through regular discharges with a typical load at temperatures above 11.9C.

您好，CEDV的7个参数的介绍请参考下面文档的3.2.3 CEDV 算法计算模型及参数

www.ti.com.cn/.../zhcaaf7.pdf