A method for estimating and optimizing SOC of power battery state of charge under simulated vehicle working conditions

A power battery and state of charge technology, which is applied in the field of SOC estimation and optimization of the power battery state of charge under simulated vehicle working conditions, can solve the problems of unfixed sampling time interval and discrete collection time, and achieve the effect of improving the stability of estimation
CN111426957BActive Publication Date: 2021-06-11SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2021-06-11

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Abstract

The invention discloses a method for estimating and optimizing the state-of-charge (SOC) of a power battery under different initial working conditions by controlling the power battery to simulate charging and discharging in constant power and variable power modes, and adjusting sampling by means of interpolation. data, grouping the data set, training the training set, and optimizing the network structure through the test set to improve the accuracy and stability; the invention improves the estimation stability in response to different temperature environments and charging and discharging switching conditions.
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Description

technical field

[0001] The invention relates to the technical field of battery management systems, in particular to a method for estimating and optimizing the SOC of a power battery under simulated vehicle operating conditions. Background technique

[0002] The state of charge (SOC) of the power battery is an important parameter for evaluating the operating state of the battery in the battery management system. The SOC of the battery state of charge represents the remaining power of the battery and has reference value for the cruising range of the vehicle. Moreover, the battery state of charge SOC is an important basis for predicting other battery parameters such as battery state of health (SOH), battery state of energy (SOE), and battery state of power (SOP).

[0003] At present, the SOC prediction methods of domestic power batteries are mainly divided into ampere-hour integral method, open circuit voltage method, and model-based method. Among them, the model-based method ...

Claims

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