Method for determining state of charge of low-voltage battery of motor vehicle

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Method for determining state of charge of low-voltage battery of motor vehicle

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MOHRMANN BJORN / SCHMIDT CHRISTIAN / KURZWEIL DENNIS / OPREE PATRICK

The invention relates to a method for determining the state of charge of a battery of a motor vehicle (2), in particular of a low-voltage battery (14). The method comprises the following steps of (S100) detecting a start (IB) of the motor vehicle (2), (S300) generating a measurement signal (MS) for an electrochemical impedance spectroscopy by using a DC-DC converter (10) of the motor vehicle (2) when a start (IB) of the motor vehicle (2) is detected, and (S400) evaluating the electrical output voltage provided by the DC-DC converter (10) and the electrical terminal voltage of the battery in order to determine the state of charge (LZ) of the battery.

本发明涉及一种用于确定机动车辆(2)的特别是低压电池(14)的电池的荷电状态的方法，该方法包含以下步骤：(S100)检测机动车辆(2)的启动(IB)，(S300)在检测到机动车辆(2)启动(IB)时，使用机动车辆(2)的DC‑DC转换器(10)产生用于电化学阻抗谱的测量信号(MS)，以及(S400)评估由DC‑DC转换器(10)提供的电输出电压和电池的电端子电压，以便确定电池的荷电状态(LZ)。

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Title :

Method for determining state of charge of low-voltage battery of motor vehicle

Additional title:

用于确定机动车辆的低压电池的荷电状态的方法

Contributors:

MOHRMANN BJORN (author) / SCHMIDT CHRISTIAN (author) / KURZWEIL DENNIS (author) / OPREE PATRICK (author)

Publication date :

2021-04-13

Type of media :

Patent

Type of material :

Electronic Resource

Language :

Chinese

Classification :

IPC:

G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen