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Single battery SOC low fault diagnosis method and system and readable storage medium

A battery cell and fault diagnosis technology, applied in the field of SOC management, can solve the problems of low accuracy rate and high false alarm rate, and achieve the effect of reducing false alarm rate, improving overall diagnostic accuracy, and improving overall operating efficiency

Pending Publication Date: 2022-08-09
杭州轻舟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technical solutions, it is usually based on the SOC at a certain moment to judge whether there is an inconsistency in the low SOC of the lithium battery, which will also lead to high false alarm rates and low accuracy.

Method used

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  • Single battery SOC low fault diagnosis method and system and readable storage medium
  • Single battery SOC low fault diagnosis method and system and readable storage medium

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0022] It sh...

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Abstract

The embodiment of the invention provides a single battery SOC low fault diagnosis method and system and a readable storage medium, and the method comprises the steps: determining the total voltage data corresponding to each battery cluster in a lithium battery energy storage system, and each battery cluster comprises a plurality of single batteries; calculating an average voltage value corresponding to each battery cluster according to the total voltage data corresponding to the corresponding battery cluster and the total number of the included single batteries; for each battery monomer in the same battery cluster, determining a fault judgment condition according to the average voltage value, a preset monomer voltage calibration value, a preset voltage difference value and a monomer voltage value of the battery monomer in a preset working stage; and when it is determined that the corresponding target battery monomer meets the fault judgment condition, outputting a fault diagnosis result representing that the SOC of the battery monomer is low and a fault exists. By adopting the method, the false alarm rate of low SOC fault diagnosis can be reduced.

Description

technical field [0001] The present application relates to the technical field of SOC management, and in particular, to a method, system and readable storage medium for diagnosing low SOC of a battery cell. Background technique [0002] The DC side of the lithium battery energy storage system consists of multiple groups of battery cells connected in series. During the discharge process of the lithium battery energy storage system, if a single battery SOC (State of Charge, The state of charge of the battery) drops to 0, then not only this battery cluster will stop discharging, but all battery clusters under the same lithium battery energy storage system will also stop discharging. cause serious safety incidents. Therefore, the minimum single SOC directly determines the overall efficiency of the lithium battery energy storage system. [0003] The low SOC of the single battery is the result of long-term accumulation. If a low SOC occurs once, it may be a special situation duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3835G01R31/382G01R31/396
CPCG01R31/3835G01R31/382G01R31/396Y02E60/10
Inventor 马兴王鹏张东宁张毅
Owner 杭州轻舟科技有限公司