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Battery evaluation device, power storage system, and battery evaluation method

A technology of power storage device and evaluation device, which is applied in the direction of battery circuit device, circuit device, power network operating system integration, etc., and can solve problems such as unrealistic, power storage system stop, etc.

Active Publication Date: 2020-06-23
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of an electricity storage system for improving power quality in an electric power system, it is impossible to stop the operating electricity storage system, so this method is unrealistic

Method used

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  • Battery evaluation device, power storage system, and battery evaluation method
  • Battery evaluation device, power storage system, and battery evaluation method
  • Battery evaluation device, power storage system, and battery evaluation method

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Embodiment Construction

[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0028] figure 1 An electric storage system (ESS: Energy Storage System) 101 according to an embodiment of the present invention is shown in FIG. The power storage system 101 includes a charge and discharge control unit 111 , an AC / DC converter 112 , a battery 113 , and a battery evaluation unit 114 corresponding to the power storage evaluation device of the present embodiment. The power storage system 101 has a function of charging and discharging the power system according to the charge and discharge command value (electric power command value) from the SCADA 201, and also has the function of evaluating the deterioration of the storage battery 113 and notifying ESS status information indicating the status of the storage battery 113 to Functions of the ESS monitoring system 301 . Hereinafter, the power storage system 101 will be described in more detail.

[0029] The...

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Abstract

The present invention evaluates the deterioration of the power storage system without stopping the function of the power storage system. A storage battery evaluation device according to an embodiment of the present invention includes a data generation unit and a degradation evaluation unit. The data generation unit generates a plurality of data corresponding to a charge amount of the power storage device and the voltage value based on a current value and a voltage value measured from the power storage device controlled to charge and discharge according to a charge and discharge command value. The degradation evaluation unit, when the distribution of the first charge and discharge command values ​​of the corresponding data belonging to the first charge amount range obtained through the charge and discharge control, satisfies a predetermined condition, and evaluates the first charge amount according to the first charge amount The distribution of the voltage value of the above-mentioned corresponding data in the range is used to evaluate the deterioration state of the above-mentioned power storage device.

Description

technical field [0001] Embodiments of the present invention relate to a battery evaluation device, a power storage system, and a battery evaluation method. Background technique [0002] An energy storage system (ESS: Energy Storage System) has a charging and discharging function, and is used for stabilization of electric power supplied by the power system, suppression of frequency fluctuations in the power system, and improvement of power quality. In addition, the power storage system is also used to reduce the peak usage of customers. Such power storage systems are expected to expand in the future market. [0003] For the purpose of improving the power quality of the system, the power storage system basically operates 24 hours / 365 days. Therefore, when performing degradation evaluation of the power storage system, it is desirable to perform the degradation evaluation without stopping the function of the power storage system. The current mainstream is to estimate deterior...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/382H01M10/48
CPCG01R31/3842G01R31/392G06F1/26G06F1/28H01M10/48H02J3/32Y02B70/3225Y04S20/222G01R31/367G01R31/396G01R31/3648H02J7/00714
Inventor 山本幸洋小杉伸一郎竹内亮介佐久间正刚和田卓久江泽彻小林武则
Owner KK TOSHIBA