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Prediction method for battery life and apparatus for detecting battery life

A technology of battery life and prediction methods, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as taking too long, and achieve the effect of saving test time

Active Publication Date: 2012-02-15
HIGHPOWER TECH HUIZHOU
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Problems solved by technology

Clearly, traditional testing methods take too long

Method used

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  • Prediction method for battery life and apparatus for detecting battery life
  • Prediction method for battery life and apparatus for detecting battery life

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Embodiment Construction

[0014] The method for predicting battery life and the method for predicting remaining battery life will be further described below mainly in conjunction with the accompanying drawings and specific embodiments.

[0015] The battery life prediction method of this embodiment is used to predict the life of the soft-pack lithium-ion battery, including: obtaining the functional relationship y between the battery capacity retention rate and the battery charge and discharge times x =a×e bx +c, where x is the number of charge and discharge times, a positive integer, y x is the capacity retention rate of the battery, and a, b, and c are constant parameters related to battery life. Charge once and discharge again is the number of charge and discharge times. The capacity retention rate of the battery is the percentage of the battery capacity to the original capacity.

[0016] The step of obtaining the functional relationship between the battery capacity retention rate and the number of...

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Abstract

The invention relates to a prediction method for battery life, wherein the method is used for predicting service life of a soft packaged lithium ion battery. The method comprises the following steps that: a functional relation between a battery capacity conversation rate and a number of times for battery charge and discharge is obtained, wherein the functional relation is expressed as: yx=a*ebx+c; besides, x is a number of times for charge and discharge and is a positive integer, yx is a battery capacity conversation rate, and a, b, and c are constant parameters correlated with the battery service life; and then according to the functional relations, the number of times for charge and discharge is calculated on the basis of a minimum capacity conservation rate. According to the invention, a capacity conservation rate of a battery is introduced into a mathematical formula to calculate a number of times of battery charge and discharge, so that the number of times of battery charge and discharge that means battery life and the residual number of times of battery charge and discharge that means residual battery life are obtained and testing time is substantially saved; besides, the method has advantages of rapidity and simpleness.

Description

【Technical field】 [0001] The invention relates to a method for predicting battery life and a device for detecting battery life, in particular to a method for testing battery life using mathematical function relationships and a device for detecting battery life. 【Background technique】 [0002] At present, in addition to the continuous requirements for the capacity of the battery, people also put forward higher requirements for the battery life, that is, the number of times the battery can be charged and discharged. The traditional prediction method of battery life is realized by charging and discharging the battery many times. However, when the battery can be charged and discharged 300 times, 500 times or even up to 1000 times, it will take too long to test the battery life. time. If the charge-discharge test is performed at a rate of 1C, the time spent for 300, 500, and 1,000 charge-discharge cycles is approximately 900 hours, 1,500 hours, and 3,000 hours, respectively. If...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 相江峰曾辉刘峰陈艳彭卓熊胜任唐赞谦
Owner HIGHPOWER TECH HUIZHOU
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