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Lithium battery residual capacity management method and system

A technology of residual capacity and management method, applied in the field of lithium battery residual capacity management method and management system, can solve problems such as insufficient capacity, residual capacity detection and management, affecting user experience, etc., to improve user experience and facilitate safety management.

Pending Publication Date: 2021-03-09
HUNAN LIFANG NEW ENERGY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But we often encounter a situation that after using electronic products for a long time, the display shows that the capacity value is 100%, but when we use it, the power drops rapidly, and even shuts down
This is actually a manifestation of the insufficient residual capacity of the battery after a long period of use, which greatly affects the user experience.
However, the existing electronic products do not detect and manage the residual capacity

Method used

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  • Lithium battery residual capacity management method and system
  • Lithium battery residual capacity management method and system
  • Lithium battery residual capacity management method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for managing residual capacity of a lithium battery, comprising the following steps:

[0030] S1, take a number of batteries of the same type as the batteries of the electronic product under test, charge a number of said batteries, select two voltage points 3.7V and 4.0V during the charging process of each battery, and calculate the voltage between 3.7V and 4.0V The charge capacity C 1 , with the charging capacity C of several batteries 1 is the abscissa, taking the full capacity C of several batteries as the ordinate, and performs linear fitting, such as figure 1 As shown, the formula C=1.661C is obtained 1 +142.9;

[0031] S2, through the power management system of the electronic product under test, obtain the charging capacity C between the voltage points of 3.7V and 4.0V when the battery of the electronic product under test is charged 1 is 2262mAh, the remaining battery capacity C is calculated by the formula obtained in step S1 残余 , C 残余 =1.661C 1 +...

Embodiment 2

[0035] A method for managing residual capacity of a lithium battery, comprising the following steps:

[0036] S1, take a number of batteries of the same type as the batteries of the electronic product under test, charge a number of said batteries, select two voltage points 3.7V and 4.0V during the charging process of each battery, and calculate the voltage between 3.7V and 4.0V The charge capacity C 1 , with the charging capacity C of several batteries 1 is the abscissa, taking the full capacity C of several batteries as the ordinate, and performs linear fitting, such as figure 1 As shown, the formula C=1.661C is obtained 1 +142.9;

[0037] S2, through the power management system of the electronic product under test, obtain the charging capacity C between the voltage points of 3.7V and 4.0V when the battery of the electronic product under test is charged 1 is 1841mAh, calculate the remaining battery capacity C by the formula obtained in step S1 残余 , C 残余 =1.661C 1 +142....

Embodiment 3

[0041] Such as figure 2 As shown, a lithium battery residual capacity management system includes:

[0042] The information extraction module is connected with the power management system of the electronic product under test, and is used to extract the battery charging data of the electronic product;

[0043] The calculation module is connected with the information extraction and screening module, and uses the filtered charging data to perform calculations, so as to obtain the remaining battery capacity and the percentage of battery remaining capacity;

[0044] The display module is connected with the calculation module, and is used for displaying the remaining capacity of the battery and the percentage of the remaining capacity of the battery on the screen of the electronic product.

[0045] Specifically, the charging data of the rechargeable battery includes the battery at the voltage point U 1 ~ U 2 between the charging capacity and the rated capacity of the battery.

...

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Abstract

The invention belongs to the technical field of lithium batteries, and particularly relates to a lithium battery residual capacity management method. The method comprises the steps of taking a plurality of batteries with the same battery model as a tested electronic product, charging the plurality of batteries, selecting two voltage points U1 and U2 in the charging process of each battery, calculating the charging capacity C1 between U1 and U2, taking the charging capacity C1 as an abscissa, taking the full capacity C as an ordinate, and carrying out linear fitting to obtain a formula C=kC1+b;obtaining the charging capacity C1 between the voltage points U1 and U2 when the battery of the tested electronic product is charged, and calculating the residual capacity C<residual> of the batterythrough the formula C<residual>=kC1+b; and calculating a battery residual capacity percentage C<residual> / C<rated value>. In addition, the invention also relates to a lithium battery residual capacitymanagement system. Compared with the prior art, the residual capacity and the residual capacity percentage of the battery are calculated, safety management of the lithium battery is facilitated, andthe user experience is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, in particular to a method and system for managing the residual capacity of lithium batteries. Background technique [0002] Lithium-ion batteries are widely used in various electronic products due to their high voltage, high energy density, small self-discharge, no memory effect, and wide operating range. [0003] The lithium battery management of existing electronic products is mainly to control the remaining power of the battery cell, mainly to infer the capacity of the battery cell through the voltage, which can visually display how much power the electronic product has and how long it can be used. But we often encounter a situation that after the electronic product is used for a long time, the display shows that the capacity value is 100%, but the power drops rapidly when we use it, and even shuts down. This is actually a manifestation of the insufficient residual capacity of the b...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/052
CPCH01M10/052H01M10/425H01M2010/4271Y02E60/10
Inventor 钟欣
Owner HUNAN LIFANG NEW ENERGY SCI & TECH
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