阅读说明：本技术 用于确定运输工具的动力电池的电池单体的单体电压的方法以及装置 (Method and device for determining the cell voltage of a battery cell of a power battery of a vehicle ) 是由 A·梅尔 于 2020-02-11 设计创作，主要内容包括：本发明涉及一种用于确定运输工具的动力电池的电池单体的单体电压的方法,其中,经由滤波机构(3)对该电池单体的单体电压进行滤波,并且经由模拟-数字转换器(4)对滤波后的单体电压进行采样,以便提供描述该电池单体的单体电压的单体电压信号,其中,对该单体电压信号进行评估,其中,还提供描述该单体电压波纹度的波纹度值,并且依据该波纹度值对该单体电压信号进行评估。(The invention relates to a method for determining a cell voltage of a cell of a power battery of a vehicle, wherein the cell voltage of the battery cell is filtered via a filter (3) and the filtered cell voltage is sampled via an analog-digital converter (4) in order to provide a cell voltage signal which describes the cell voltage of the battery cell, wherein the cell voltage signal is evaluated, wherein a ripple value which describes a ripple of the cell voltage is also provided and the cell voltage signal is evaluated as a function of the ripple value.)

1. A method for determining a cell voltage of a cell of a power battery of a vehicle, wherein the cell voltage of the cell is filtered via a filter means (3) and the filtered cell voltage is sampled by means of an analog-to-digital converter (4) in order to provide a cell voltage signal which describes the cell voltage of the cell, wherein the cell voltage signal is evaluated, characterized in that a ripple value which describes a ripple of the cell voltage is also provided and the cell voltage signal is evaluated in dependence on the ripple value.

2. A method as claimed in claim 1, characterized in that, for determining the ripple value, a total voltage of the power cell is determined, a voltage ripple of the total voltage is determined and the voltage ripple is measured for the battery cell.

3. Method according to claim 2, characterized in that the voltage ripple of the total voltage is determined to be within a predefined frequency range, in particular within a frequency range of 50 Hz to 2 kHz.

4. Method according to one of the preceding claims, characterized in that the cell voltage is filtered via a low-pass filter, in particular a low-pass filter with an angular frequency of between 500 Hz and 1.5 kHz, and the filtered cell voltage is sampled at a predefined sampling rate, in particular a sampling rate of between 50 Hz and 200 Hz.

5. Device (1) for determining the cell voltage of a battery cell of a power battery of a vehicle, having: a first sensor (2) for detecting the cell voltage, a filter device (3) for filtering the cell voltage, an analog-digital converter (4) for sampling the filtered cell voltage and for outputting the sampled filtered cell voltage as a cell voltage signal, and a computing device (5) for evaluating the cell voltage signal, characterized in that the device (1) has a second sensor (6) for providing a ripple value, wherein the ripple value describes the ripple of the cell voltage, and the computing device (5) is designed to evaluate the cell voltage signal as a function of the ripple value.