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A power battery monitoring and early warning method

A technology of power batteries and battery cells, which is applied in the direction of measuring electricity, electric vehicles, measuring electrical variables, etc., can solve problems such as overheating, and achieve the effect of avoiding irreversible effects

Active Publication Date: 2022-06-07
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for problems such as overheating, the whole process from the abnormality of the battery pack to the overheating of the battery pack may only take tens of minutes
It is difficult to determine which battery cells are faulty in a short period of time from the physical level

Method used

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Experimental program
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Embodiment Construction

[0041] refer to figure 1 and figure 2 , this embodiment provides a power battery monitoring and early warning method, including:

[0042] In S101, first obtain multiple sets of data of the same model from the big data platform that stores the battery data of the same model (the car monitoring platform of the car company). month) and vehicle data uploaded within a geographic interval (such as a city located in the same region). In one set of data, the total voltage data and battery cell voltage data of the power batteries of multiple vehicles are recorded. For example, a set of data is formed by reading the battery data uploaded by vehicles of a certain model in Chongqing in August 2020. It is assumed that the set of data contains the total voltage data of the battery packs uploaded by each of 5,000 vehicles and each battery unit. Cell voltage data for the body.

[0043] In S102, this step is mainly used to decompose the acquired set of data according to the mileage, mainl...

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Abstract

The invention provides a power battery monitoring and early warning method, the purpose of which is to obtain all the normal voltage values ​​of the same vehicle type through the calculation and analysis method of the big data through the real-time voltage value of the battery pack monomer uploaded by the vehicle to the big data platform. The normal range of the voltage value of the vehicle under different charging conditions and different power levels, and then judge the abnormal point of the vehicle's battery pack according to the normal range of the voltage value.

Description

technical field [0001] The invention relates to the field of power batteries, in particular to a power battery monitoring and early warning method. Background technique [0002] With the continuous popularization of new energy electric vehicles in major first- and second-tier cities, various market problems of electric vehicles are also particularly prominent. Among various market problems, battery-related problems are the most prominent, such as power failure, mileage attenuation, overheating, etc. Most of these battery problems have become the main complaints of market users. [0003] At present, the method of early warning for power batteries can only stay at the physical level, and different levels of battery early warning information can be obtained according to the changes in the data related to the volume of the battery pack. However, for problems such as overheating, the entire process from the abnormality of the battery pack to the overheating of the battery pack m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367G01R31/396G01R31/3835
CPCG01R31/367G01R31/396G01R31/3835Y02T10/70
Inventor 徐鹏飞李宗华林富李易李小铜
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD