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: 2013-10-30
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 complicated.
[0020] It can be seen that the current calculation of the remaining capacity and health status of the battery is the weak link in the current battery management

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 remaining capacity and health status of a storage battery. The invention realizes the prediction of the remaining capacity of the battery based on the ampere-hour integral method and the open-circuit voltage method, and adjusts it according to the discharge current and the ambient temperature. Self-correction, correcting the impact of battery aging on power prediction. At the same time, according to the working characteristics of the vehicle battery, a battery failure judgment mode based on the combination of open circuit voltage and ampere-hour integration is proposed, which avoids the trouble of checking and discharging the battery. The experiment proves that the capacity obtained by this method has high reliability for the vehicle traction battery that is not in the floating charge state for a long time. The present invention has greater application significance for the social background that current electric bicycles are widely used, but most users know little about the state of batteries.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 朱平陈富强唐旭清
Owner JIANGNAN UNIV
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