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Parameter estimation device, parameter estimation method, power storage system

An inference device and parameter technology, applied in the field of parameter inference devices, to achieve the effect of improving inference accuracy

Active Publication Date: 2017-05-17
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, parameters such as the "residual capacity rate" or "lifetime" of the above-mentioned power storage device (lithium ion battery) are parameters that cannot be directly observed.

Method used

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  • Parameter estimation device, parameter estimation method, power storage system
  • Parameter estimation device, parameter estimation method, power storage system
  • Parameter estimation device, parameter estimation method, power storage system

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Embodiment Construction

[0031] Hereinafter, a parameter estimation device according to an embodiment of the present invention will be described with reference to the drawings.

[0032] figure 1 It is a diagram showing the functional configuration of a parameter estimation device according to an embodiment of the present invention.

[0033] The parameter estimating device 1 is a device that specifies estimated values ​​of a plurality of parameters that represent the state of a predetermined device and change with operation. Here, the "predetermined device" in the present embodiment includes, for example, an "electricity storage device". That is, the parameter estimating device 1 is a parameter estimating device that determines estimated values ​​of "charging rate" and "internal resistance" that cannot be directly measured for a plurality of parameters that vary as the operation of the "power storage device".

[0034]Furthermore, the parameter estimation device 1 includes a state quantity actual meas...

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Abstract

The present invention provides a parameter estimation device, a parameter estimation method, a power storage system and a program. The parameter estimation device comprises: a state quantity actual measurement unit (11), which acquires the actual measurement value of a state quantity correlated with a plurality of parameters; Part (12), according to the correlation between the estimated values ​​of the plurality of parameters and the above-mentioned state quantities, calculates and obtains the calculated values ​​corresponding to the actual measured values; The value of the error evaluation function calculated by multiplying the sum of the absolute magnitudes of the errors of the corresponding calculated values ​​by the first coefficient and the deviation degree of the error by the second coefficient, changing the above-mentioned estimated value, and An optimum estimated value that minimizes the value of the error evaluation function is determined.

Description

technical field [0001] The present invention relates to a parameter estimating device, a parameter estimating method, a power storage system, and a program for estimating a plurality of parameters indicating a state of a device. [0002] This application claims priority based on Japanese Patent Application No. 2012-274750 for which it applied on December 17, 2012, The content is used for this specification. Background technique [0003] In recent years, especially from the viewpoint of effective use of renewable energy, the importance of power systems / power supply systems equipped with secondary batteries such as lithium-ion batteries has increased. Among them, from the viewpoint of operation / maintenance of electric power systems using lithium ion batteries, real-time detection of charge rate (residual capacity rate) or internal resistance (battery life) of lithium ion batteries during operation of lithium ion batteries is required. However, parameters such as the "residual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36H01M10/48
CPCG01R31/367G01R31/389G01R31/382G01R31/3648
Inventor 若杉一幸森田克明尾崎和基重水哲郎桥本雅之
Owner MITSUBISHI HEAVY IND LTD
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