Method for predicting left capacity and health status of storage battery

A technology of remaining capacity and health status, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of complex hardware circuit of internal resistance test method, and achieve the effect of high reliability

Inactive Publication Date: 2011-11-02
JIANGNAN UNIV
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Problems solved by technology

The deep discharge method requires special equipment and a disconnection test. The hardware circuit of the internal resistance test method is relatively compli...

Method used

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  • Method for predicting left capacity and health status of storage battery
  • Method for predicting left capacity and health status of storage battery
  • Method for predicting left capacity and health status of storage battery

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Embodiment Construction

[0074] The specific implementation manners of the present invention will be further described below.

[0075] The invention adopts the method of combining the ampere-hour integral method and the open-circuit voltage method, and is especially designed for the vehicle-mounted application environment where batteries are widely used. On the one hand, the ampere-hour integration method is convenient for hardware implementation; on the other hand, the open circuit voltage has a good linear relationship with the remaining capacity. Since the electric vehicle belongs to the intermittent working mode, before the general electric vehicle starts to run, it has to stop for a long time, so it can be considered that the voltage measured before each electric vehicle starts is the open circuit voltage of the battery. Of course, parking for the electric vehicle should be excluded here Charge and float charge until the next start. Considering that the open circuit voltage of an electric vehicl...

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Abstract

The invention discloses a method for predicting the left capacity and the health status of a storage battery. According to the invention, predicting the left capacity of the battery based on an ampere hour integration method and an open-circuit voltage method is realized, an adjustment is carried out based on discharge currents and ambient temperature, a self correction is carried out in a process of continuous driving and influences from cell agedness on electric capacity prediction are corrected. Based on the working characteristic of a vehicle cell, a cell failure determination mode based on a combination of open-circuit voltage and ampere hour integration is put forward and the trouble of carrying out a check discharge test towards the cell is avoided. Experiments show that in the case of vehicle power storage battery which is not at a float status in a long term, the capacity obtained from the method has a high reliability. The invention is directed to the social background that motor-assisted bicycles are frequently used at present while most users know little about the cell status and has great application significances.

Description

technical field [0001] The invention belongs to the technical field of storage battery management, in particular to a method for predicting the remaining capacity and health status of a storage battery based on an ampere-hour integral method and an open-circuit voltage method. Background technique [0002] At present, power storage batteries are widely used in railway locomotives, electric vehicles, especially the very popular electric bicycles. The technology of lead-acid battery is relatively mature, and the relevant theory and experience are relatively rich. The newly launched sealed valve-regulated maintenance-free lead-acid battery is widely used, especially in the field of electric bicycles. It adopts a fully sealed and leak-proof design, which solves the problem of battery water loss, and can operate without maintenance. It has the advantages of large capacity, high specific energy, small self-discharge, long service life, high sealing efficiency, safety and reliabili...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 朱平陈富强唐旭清
Owner JIANGNAN UNIV
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