这个相加的电压主要为电源频率的信号，其对于电压表读数的影响决定于电压表的串模抑制能力。

This added voltage is mainly power line frequency and its effect on the voltmeter reading will depend upon the normal-mode rejection capability of the meter.

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确保电池串两端的电压不超过开关模块的共模电压额定值和最大电压是非常重要的。

It is important to ensure that the total cell voltage across the string does not exceed the common mode voltage rating and the maximum voltage level of the switch module.

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