State of charge correction method, device, system and storage medium of battery

A state-of-charge and state-of-charge technology, which is applied in secondary battery repair/maintenance, secondary battery charging/discharging, and measurement devices, can solve problems such as large errors in the open circuit voltage method and reduced accuracy of corrected SOC.

Active Publication Date: 2020-12-11
CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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Problems solved by technology

However, for the cell system with hysteresis characteristics, the OCV curve representing the correspondence between OCV and SOC is affected by historical working conditions, and changes in the OCV curve will lead to large errors in the open circuit voltage method, reducing the accuracy of correcting SOC. sex

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  • State of charge correction method, device, system and storage medium of battery
  • State of charge correction method, device, system and storage medium of battery
  • State of charge correction method, device, system and storage medium of battery

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Embodiment Construction

[0026] The characteristics and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do ...

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Abstract

The invention discloses a battery charge state correction method, device, system and storage medium. The method includes: determining the current open circuit voltage measurement value of the battery, determining whether the current open circuit voltage measurement value is in the hysteresis voltage interval; when the current open circuit voltage measurement value is in the hysteresis voltage interval, determining the charging state corresponding to the current open circuit voltage measurement value in the charging state The state of charge value, and the discharge state of charge value corresponding to the current open circuit voltage measurement value in the discharge state; based on the state of charge credible interval formed by the charge state of charge value and the discharge state of charge value, determine the state of charge correction target value , to correct the current state of charge of the battery. According to the method provided by the embodiment of the present invention, the state of charge of the battery with hysteresis characteristics is corrected, and the accuracy of estimating the state of charge value of the battery is improved.

Description

technical field [0001] The present invention relates to the technical field of batteries, in particular to a method, device, system and storage medium for correcting the state of charge of batteries. Background technique [0002] In the battery management system of electric vehicles, the State of Charge (SOC) of the battery is used to reflect the remaining capacity of the battery, and SOC is also an important factor for battery capabilities such as balanced control technology, rapid charge and discharge management, and safe operation. parameter. Therefore, accurate SOC estimation plays an important role in realizing the battery management system's power indication, remaining mileage, overcharge and overdischarge protection, battery balancing, charging control, and battery health prediction. [0003] Currently commonly used SOC correction methods, such as the open-circuit voltage method, can use the corresponding relationship between the open-circuit voltage (Open-Circuit Vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/382G01R31/396
CPCG01R31/382G01R31/396H01M10/48H02J7/0048G01R31/3835Y02E60/10G01R31/3648H01M10/44
Inventor 杜明树李世超汤慎之阮见卢艳华张伟
Owner CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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