This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ77216: 关于BQ7721607PWR减少电池节数使用的问题

Part Number: BQ77216

您好

我们公司正在使用贵公司的BQ7721607PWR进行BMS开发, 电路中使用了电池保护芯片BQ7721607PWR,该项目中芯片16路只用了其中10

按照手册中的说明,删除R299、R300、R301、R302、R303、,R304,将C72、C71、C357、C358、C359、C360换成0Ω,短路CELL10和CELL16,

但DOUT一直输出高电平,仍然欠压保护了,从表现上看,不用的引脚似乎不能短接,否则触发欠压保护。手册和原理图如图所示。

电路原理图:

手册推荐的使用方法:

  • 您好,请参考下面内容

    Cell count for the BQ77216 is typically reduced by shorting the inputs starting at the top, see the BQ77216 data sheet figure 9-3 for an example with 14 cells.  Cells which are below the VUV_MIN UV Detection Disabled Threshold in the section 7.5 DC Characteristics are not used for UV detection.  Shorted cells also will not fault from OV or the open wire detection.

    Cell inputs in the center of the stack can be shorted also.  Cell 1 has a different  open wire detection threshold since it operates at VSS, see the VOW OW Detection Threshold parameter.  Shorting cell 1 is not recommended.