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Method and system for evaluating health of battery energy storage system

A technology of battery energy storage system and health degree, which is applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of small abnormal equipment effect is not obvious, battery energy storage system battery evaluation effect is limited, etc.

Active Publication Date: 2021-03-19
SHANGHAI ELECTRIC DISTRIBUTED ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the evaluation method of the health degree of the battery energy storage system in the prior art has relatively limited effects on evaluating the health degree of the cascade utilization battery based on the SOH value, and the evaluation method based on the alarm data is not suitable for minor abnormalities. The purpose is to provide a method and system for evaluating the health of battery energy storage systems

Method used

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  • Method and system for evaluating health of battery energy storage system
  • Method and system for evaluating health of battery energy storage system
  • Method and system for evaluating health of battery energy storage system

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Experimental program
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Embodiment 1

[0183] Such as figure 1 As shown, the battery energy storage system in this embodiment includes other equipment such as an energy storage converter and a battery pack control management unit.

[0184] The health assessment method of the battery energy storage system in this embodiment includes:

[0185] S101, preset the first full score value corresponding to each first health parameter of the energy storage converter, and preset the second full score value corresponding to each second health parameter of the battery pack control management unit;

[0186] Among them, the first health parameter of the energy storage converter includes the degree of frequency deviation, the unbalance degree of the three-phase voltage on the AC side, the unbalance degree of the three-phase current on the AC side, the efficiency of the energy storage converter and the energy storage Converter uptime;

[0187] The second health parameter of the battery pack control management unit includes the de...

Embodiment 2

[0196] Such as figure 2 As shown, the evaluation method for the health of the battery energy storage system in this embodiment is a further improvement on Embodiment 1, specifically:

[0197] Assuming that the time interval of data transmission is t minutes, the health evaluation of each energy storage converter and each battery pack control management unit in the system is performed every m minutes.

[0198] Step S101 includes:

[0199] S1011. Preset the first weight of each first health parameter of the energy storage converter;

[0200] S1012. Set the first full score value corresponding to each first health degree parameter according to the first weight;

[0201] Wherein, the first weight is directly proportional to the first full score value;

[0202] Step S101 also includes:

[0203] S1013. Preset the second weight of each second health degree parameter of the battery pack control management unit;

[0204] S1014. Set a second full score value corresponding to each ...

Embodiment 3

[0336] Such as image 3 As shown, the evaluation method for the health of the battery energy storage system in this embodiment is a further improvement on Embodiment 1, specifically:

[0337] Also include before step S105:

[0338] S10502. Obtain the system efficiency of the battery energy storage system within the second set time;

[0339] Wherein, the second set time includes the first set time;

[0340] Step S105 includes:

[0341] S1053. According to the system efficiency, the first target score and the second target score, respectively calculate the correlation between each energy storage converter in the battery energy storage system, each battery pack control management unit and the system efficiency The correlation coefficient;

[0342] S1054. Obtain the health degree of each energy storage converter and the second proportion of the health degree of each battery pack control management unit in the health degree of the battery energy storage system according to the ...

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Abstract

The invention discloses an assessment method and system for the health degree of a battery energy storage system. The assessment method comprises the following steps: presetting a first full score value of a first health degree parameter of an energy storage converter and a second full score value of a second health degree parameter of a battery pack control management unit; acquiring a first parameter value of the first health degree parameter of the energy storage converter, and acquiring a second parameter value of the second health degree parameter of the battery pack control management unit; acquiring a first score of the first health degree parameter, and acquiring a second score of the second health degree parameter; and acquiring a first target score, acquiring a second target score, and then evaluating the health degree of the battery energy storage system. By applying the method, the health degree evaluation accuracy of the existing battery energy storage system is improved,and the operation state of the battery energy storage system can be obtained more clearly and accurately; and when the health degree of the battery energy storage system is reduced, predictive maintenance can be carried out, and losses caused by faults can be avoided in advance.

Description

technical field [0001] The invention relates to the technical field of equipment management, in particular to a method and system for evaluating the health of a battery energy storage system. Background technique [0002] Equipment health is a comprehensive evaluation of equipment operating status, equipment degradation status, and equipment failure probability. Among them, the operating status of the equipment is mainly evaluated by obtaining the status parameters of the equipment. However, in actual engineering, most of the equipment is packaged in a cabinet, and there are few equipment parameters that can directly reflect the health status of the equipment. Therefore, it is difficult to select parameters. . [0003] For battery energy storage systems, it is difficult to assess the health of the battery pack due to its varying charging and discharging performance and the working environment of the battery pack. In addition, due to the large investment scale of power batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/392G01R31/367
CPCG01R31/3648
Inventor 常悦马玉鑫杨青李路遥
Owner SHANGHAI ELECTRIC DISTRIBUTED ENERGY TECH CO LTD