A power cell monitoring method and system and a vehicle

Abstract

A power cell monitoring method and system and a vehicle are disclosed. A power cell includes b cell modules. Each of the cell modules includes a single cells. The method includes acquiring a single cell M corresponding to a single voltage extremum value or a single temperature extremum value according to sequentially collected N single voltages or N single temperatures of the single cell 1 to the single cell N; and acquiring the cell module where the single cell M is in and the position of the single cell M in the corresponding cell module according to the M and the a, wherein 1<=M<=N, and N=a*b. The specific position of a single cell corresponding to abnormal data such as a single voltage maximum value, a single voltage minimum valve, a single temperature maximum value or a single temperature minimum value in the power cell can be rapidly and accurately detected by the method, thus facilitating intensive monitoring on the single cell corresponding to the abnormal data, and facilitating maintenance of the single cell corresponding to the abnormal data.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a monitoring method and system for a power battery and a vehicle. Background technique [0002] The power battery, such as the power battery of an electric vehicle, is usually composed of hundreds of single cells. Multiple cell voltages and multiple cell temperatures of multiple single cells are important for the battery management system to determine whether the power battery is abnormal. The judgment of the cell voltage plays a crucial role, for example: when the voltage difference between the cell voltages is too large, battery balancing is required; another example: when the voltage difference between the cell voltages is very large, it may be the corresponding cell It has malfunctioned and needs to be replaced. Therefore, the battery management system needs to monitor the cell voltage and cell temperature of each cell. [0003] In the related art, although the battery ...

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Problems solved by technology

[0003] In the related art, although the battery management system can monitor the cell voltage and cell temperature of each cell, since the power battery is composed of multiple battery modules, and each battery module includes multiple cell , therefore, it is impossible to easily determine which single battery in which battery module is abnormal, and it is impossible to carry out focused monitoring or maintenance on the abnormal single battery

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