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Storage battery health state on-line real-time evaluating method

A state of health and storage battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as low work efficiency, lack of charging monitoring, system hidden dangers, etc., and achieve the effect of reducing workload

Inactive Publication Date: 2017-12-08
SHANGHAI HUGE INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Commonly used qualitative tests include system online testing or manual on-site testing. The health of the battery can only be judged through the consistency of the relevant voltage or the consistency of the internal resistance, and the accuracy of the SOC is not high;
[0004] The accuracy of off-line discharge is better, but it needs 10 hours of manual on-site operation, which is labor-intensive and low-efficiency
[0005] Due to the large discharge current and long discharge time, the online discharge method lacks effective charging monitoring, and there are certain hidden dangers in the system when no one is on duty.

Method used

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Embodiment Construction

[0023] The present invention will be further described below:

[0024] The present invention comprises a test part and background evaluation part, and said test part comprises the following steps:

[0025] Step 1: Select "excellent", "qualified" and "replacement" standard battery packs for the battery pack to be tested, conduct all-weather cell voltage monitoring U1...Un, cell voltage consistency monitoring △U1...△Un, and obtain Voltage time U / t curve, voltage consistency value △Un / t;

[0026] Step 2: The standard battery pack conducts multi-cycle online fixed-time discharge of the actual load of the system to obtain a voltage-time curve; conducts a constant-voltage online discharge to obtain the actual power supply time value Tn;

[0027] Step 3: After the discharge is completed, before switching to charging, conduct a discharge state internal resistance test on the battery to obtain the internal resistance value Rn of the battery;

[0028] The background evaluation part in...

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PUM

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Abstract

The invention discloses a storage battery health state on-line real-time evaluating method. The method comprises a test part and a background evaluation part. The method can accurately realize on-line health state assessment of storage batteries, realizes conversion from periodic maintenance to state maintenance, and carries out off-line discharge test on the last 5-10% of the storage batteries, the health states of which are worst, instead of carrying out off-line discharge test on all storage batteries in the prior art, so that 90% of storage battery maintenance workload can be reduced.

Description

technical field [0001] The invention relates to the technical field of assessment methods, in particular to a method for online and real-time assessment of the health state of a storage battery. Background technique [0002] At present, there are mainly two methods in the field of battery health analysis: qualitative testing and quantitative testing. Qualitative testing mainly conducts single voltage testing, voltage consistency testing, internal resistance testing, and battery temperature testing online or offline. Quantitative testing involves offline discharge of the battery pack through a dummy load. [0003] Commonly used qualitative tests include system online testing or manual on-site testing. The battery health can only be judged by the consistency of the relevant voltage or the consistency of the internal resistance, and the accuracy of the SOC is not high; [0004] The accuracy of off-line discharge is better, but it needs 10 hours of manual on-site operation, whi...

Claims

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Application Information

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IPC IPC(8): G01R31/36G01R27/02
CPCG01R27/02G01R31/387
Inventor 张永飞阚硕
Owner SHANGHAI HUGE INTELLIGENT TECH