Storage battery pack health degree assessment method

A technology of battery pack and health degree, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of low accuracy, and achieve the effect of high accuracy

Inactive Publication Date: 2018-01-09
JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method mostly monitors the state of a single battery, and the analysis of the operating state of the entire battery pack is mostly calculated by weighting the state of a single battery, and the accuracy is relatively low.

Method used

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  • Storage battery pack health degree assessment method
  • Storage battery pack health degree assessment method
  • Storage battery pack health degree assessment method

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Experimental program
Comparison scheme
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Embodiment Construction

[0039] A method for evaluating the health of a storage battery pack according to the present invention comprises the following steps:

[0040] 1. Establish a battery health standard parameter model

[0041] Set each feature quantity standard value health sequence associated with the battery pack health to be evaluated:

[0042] x (0) ={X (0) (1),X (0) (2),...,X (0) (k)};k=1,2,...,n;

[0043] Each number in the sequence represents the standard value of each characteristic quantity of the battery pack; n represents the total number of characteristic quantities;

[0044] Set the maximum floating range allowed for each characteristic quantity as the threshold value, represented by ΔX(k);

[0045] 2. Initialization process of feature quantity

[0046] Select the sequence composed of the actual values ​​of each feature quantity of the battery pack to be evaluated as the comparison sequence as follows:

[0047] x (i) ={X (i) (1),X (i) (2),...,X (i) (k)},i=1,2,...,m;

[0...

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Abstract

The invention discloses a method for evaluating the health degree of a battery pack, which comprises the following steps: setting each feature quantity standard value health degree sequence associated with the battery pack health degree; setting the maximum floating range allowed by each feature quantity is the threshold value; select the sequence composed of the actual value of each characteristic quantity of the battery pack to be evaluated as the comparison sequence; compare and calculate the actual value of each characteristic quantity in the comparison sequence with the corresponding standard value of the characteristic quantity, and obtain the nominal value; The nominal value sequence and nominal value reference sequence after initialization of the actual value of each battery group are obtained through the nominal value calculation formula; the gray correlation analysis algorithm is used as the calculation model to calculate the correlation coefficient of each battery comparison sequence to the reference sequence ; Determine the health evaluation result. The beneficial effect is that the method can accurately calculate the health degree score of the whole set of storage batteries, realize the analysis and judgment of the operation state of the storage batteries, and has high accuracy.

Description

technical field [0001] The invention belongs to the field of battery technology, and in particular relates to a method for evaluating the health degree of a battery pack. Background technique [0002] The storage battery plays an extremely important role in practical application as an emergency guarantee means of the power supply system. However, since the battery is affected by many factors such as temperature, float voltage, float current, and service life in actual operation, how to quickly and accurately evaluate its health has become a difficult problem. [0003] At present, there are two main methods for judging battery health: [0004] 1. Charge and discharge test. According to the maintenance technical requirements of the communication bureau (station) power supply system: for a 2V single battery, a capacity test should be done every 3 years, and once a year after 6 years of use. For each measurement, use the battery charge and discharge tester to discharge the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 赵梦晴王兴李慰谢玲张天一
Owner JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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