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Storage battery state of charge calculation method and device

A technology of state of charge and calculation method, which is applied in measurement devices, measurement of electricity, measurement of electric variables, etc., can solve the problems of low accuracy of SOC estimation methods, and achieve the effect of improving accuracy and prediction accuracy.

Inactive Publication Date: 2017-05-10
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing SOC estimation method has low accuracy

Method used

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  • Storage battery state of charge calculation method and device
  • Storage battery state of charge calculation method and device
  • Storage battery state of charge calculation method and device

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Embodiment Construction

[0020] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Such as figure 1 As shown, the embodiment of the present invention provides a battery state of charge calculation method, which may include the following steps:

[0022] S1. Determine the initial state of charge of the battery according to the open circuit voltage method and the artificial neural network method.

[0023] As mentioned in the background technology section, the initial SOC value of the battery is the initial point and reference point for the calculation of the entire battery power, and its calculation accuracy is very important. However, the existing physical modeling methods and the identification and parameter estimation modeling methods of the entire system A single prediction method cannot meet the needs of the initial SOC value. The inventors of the present invention have found after research that when the SOC value is particu...

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Abstract

The present invention discloses a storage battery state of charge calculation method and device. The method includes the following steps that: the initial state of charge of a storage battery is determined according to an open-circuit voltage method and an artificial neural network method; and the state of charge of the storage battery is calculated through using an accumulated electric quantity method according to the initial state of charge and charging / discharging current values. Thus, with the storage battery state of charge calculation method and device of the invention adopted, the precision of the initial state of charge is improved, and therefore, the prediction accuracy of a charge of state value can be improved finally.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a method and device for calculating the state of charge of a storage battery. Background technique [0002] In recent years, with the development of new energy power generation and electric vehicle industry, battery is an important part of energy storage, and battery management system (Battery Management System, BMS) has become the focus of research. Battery state of charge (State of Charge, SOC, also known as remaining power) estimation is one of the most important functions in BMS. The state of charge represents the remaining capacity of the battery after it has been used for a period of time or left unused for a long time and its full charge state The ratio of the capacity of the battery is usually expressed as a percentage, and its value ranges from 0 to 1. When SOC=0, it means that the battery is completely discharged, and when SOC=1, it means that the battery is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/367G01R31/374G01R31/388
Inventor 李进雷龙郝占聚许敏杨中厦
Owner GREE ELECTRIC APPLIANCES INC
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