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Method and device for predicting a rechargeable battery's lifetime

A technology of recharging and batteries, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve unexpected problems

Inactive Publication Date: 2011-04-06
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means, for example, that the circuit is permanently attached to the battery, which is undesirable in terms of energy and space consumption

Method used

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  • Method and device for predicting a rechargeable battery's lifetime
  • Method and device for predicting a rechargeable battery's lifetime
  • Method and device for predicting a rechargeable battery's lifetime

Examples

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Embodiment Construction

[0033] In a first and preferred embodiment according to the invention, the maximum capacity of the battery is monitored in order to estimate the lifetime of the battery. figure 1A flowchart schematically illustrating this embodiment is depicted. Step 102 involves using the battery prior to charging the battery for the first time. In step 106, before charging the battery, the voltage of the battery is measured using a voltmeter known per se. In step 106, the battery is operated with a sufficiently small leakage current so that the measured battery voltage corresponds to a so-called equilibrium voltage value of the battery, which is commonly referred to as the battery's EMF. Step 108 includes determining the state of charge of the battery prior to charging the battery based on the voltage of the battery measured during step 106 and by using a lookup table relating the voltage of the battery to the state of charge of the battery. Here, the state of charge of the battery before ...

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PUM

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Abstract

A method is disclosed for determining an end of life for a rechargeable battery comprising the steps of using the battery (102), charging the battery (112) and making an estimation of a battery's lifetime (128), characterized by monitoring a battery characteristic indicative for battery aging (122).

Description

technical field [0001] The present invention relates to a method for determining the end of life of a rechargeable battery comprising charging the battery and estimating the life of the battery. The invention further relates to a device for determining the end of the life of a rechargeable battery, the device comprising a battery charger and a provision for estimating the life of the battery. Background technique [0002] The technique disclosed in WO-A 2006 / 094287 provides a method for monitoring and storing data about the battery lifetime history associated therewith. A manufacturer-specified lifetime expectation, measured in battery cycles, is established for a battery under normal use, and the actual use of the battery is then monitored and stored. Full cycles, partial cycles, and operation of the battery outside acceptable specifications are automatically derived as values ​​equivalent to units of many battery cycles. This derivation is compared with, and adjusted for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/3679G01R31/392
Inventor H·C·F·马滕斯
Owner KONINK PHILIPS ELECTRONICS NV