Part Number:BQ76940
Hi Ti工程师,
在第五串或者第6串开启均衡时,他相邻的的那个电压跳动就比较大,有的时候跳动甚至有300mV。下图是原理图:
15s.pdf
在第10.11串也有,但是跳动没那么大。
下图是一个电池充电,第5串的数据。
Star Xu:
您好,The cell measurement does not take place during balancing, but the voltage can take time to settle for cell measurements depending on the input filter component values (Rc and Cc). An example waveform can be found in Figure 5 of this app note: www.ti.com/…/slua775.pdfIf filter settling is the issue, I do not think you can solve this without modifying the hardware. If the voltage variation is small, maybe you could turn off balancing when you are getting close to the OV voltage – one idea for software modification.