CN101299542A - Control method for quickly charging battery - Google Patents
Control method for quickly charging battery Download PDFInfo
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- CN101299542A CN101299542A CN 200810020413 CN200810020413A CN101299542A CN 101299542 A CN101299542 A CN 101299542A CN 200810020413 CN200810020413 CN 200810020413 CN 200810020413 A CN200810020413 A CN 200810020413A CN 101299542 A CN101299542 A CN 101299542A
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- battery
- charging
- internal resistance
- cell
- charging current
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Abstract
The invention discloses a cell fast charge control method based on the theory of 'direct current charging measurement', including changing the charging current, to obtain the internal resistance size of cell through detecting the changing condition at the two end of the secondary battery or the battery; then realtime outputting the controlling quantity of the charging current according to the range of the internal resistance of the cell and the measured adjusting strategy; meanwhile determining end of the fast charge process according to that whether the surface temperature exceeds the set value or the battery charging voltage is present with minus delta U, to reach the object of safe, fast and high efficiency charging. The invention has simple realization and marked effect; the inventive charger can effectively prolong the service life of the secondary cell and advance the availability of the secondary cell.
Description
Technical field
The present invention relates to the internal resistance variable condition that a kind of employing " DC charging mensuration " detected and judged secondary cell, realize the secondary cell control method for quickly charging of safety, quick charge.Specifically a kind of control method for quickly charging battery based on " DC charging mensuration " principle.
Background technology
Along with a large amount of of portable type electronic product and electric vehicle popularize, change to " key " parts from " supporting role " in past as the role of the secondary cell that electric power energy is provided to them.Simultaneously, because the continuity that these products and instrument use needs, the safety of secondary cell, quick charge The Application of Technology then seem important all the more.Yet present employed fast charge mode has certain limitation.Particularly when part service time long secondary cell when internal resistance is bigger than normal, in case adopt big electric current quick charge, then can produce bigger overshoot current, cause the charging failure and can not use, cause unnecessary waste.Therefore, designing quick charge device a kind of simple possible, regulate charge parameter according to the internal state of battery seems with the charging demand that satisfies various state batteries and is even more important.Also there is not this simple and effective control method at present on the market.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of control method for quickly charging battery based on " DC charging mensuration " principle.This method adopts " DC charging mensuration " detection and judges the internal resistance variable condition of secondary cell, and regulates charging current according to the size reasonable of the internal resistance of cell, realizes safety, quick charge.The present invention carries out quick, safe charging control to the secondary cell that comprises various states such as internal resistance is bigger than normal, can effectively prolong the useful life of secondary cell.
Purpose of the present invention is achieved through the following technical solutions:
A kind of control method for quickly charging battery is characterized in that: this method obtains the size of the internal resistance of cell this moment by the variation that detects secondary cell voltage when changing charging current, and realizes the Optimal Control of quick charge according to the internal state of battery; It may further comprise the steps:
1) battery or battery pack with a certain electric current I charging process in, the moment charging current Δ I that superposes, be that charging current becomes I+ Δ I, the electric current of this stack produces a voltage increment Δ U=U2-U1 in the internal resistance of battery, measure the voltage U 1 and the U2 at charging current stack front and back battery or battery pack two ends;
2) calculate voltage increment Δ U=U2-U1 according to measured voltage U 1 and U2, obtain internal resistance of cell R this moment by Δ I and Δ U
iValue: R
i=(U2-U1)/(I+ Δ I-I)=Δ U/ Δ I.
3) according to the internal resistance of cell currency of measuring and calculating, determining to increase still is the value that keeps charging current, and determines charging current I the n time according to following fuzzy control rule
nThe adjusting strategy:
If the internal resistance R that measures for the n-1 time
N-1For greatly, promptly 30% of the measured value value of being above standard, I then
n=I
N-1
If the internal resistance R that measures for the n-1 time
N-1For bigger, promptly the measured value value of being above standard between 1%～30%, I then
n=I
N-1+ I
d, I wherein
dBe the current unit increment;
If the internal resistance R that measures for the n-1 time
N-1For not quite, promptly measured value in standard value allows fluctuation range, I then
n=I
N-1+ kI
d, (k=2,3,4);
If continuous three measured internal resistance R
N-3, R
N-2And R
N-1All little, I then
n=I
Max, I wherein
MaxBe maximum charging current;
4) by realize the Optimal Control of quick charge with the adjusted strategy.
The present invention is a kind of control method for quickly charging battery based on " DC charging mensuration " principle, and it adopts monolithic computer as controller, measures, calculates and analyze the charged state of secondary cell, the charging current of control and regulating cell; If battery or battery surface temperature surpass the voltage of set point or battery or batteries charging and occur continuously-Δ U, then make I
n=I
Small, finish quick charge, change trickle charge into, wherein I
SmallBe 0.05C.
The present invention is based on " DC charging mensuration " principle, when changing charging current, obtain the size of the internal resistance of cell this moment, and realize the Optimal Control of quick charge according to the internal state of battery by the variation that detects secondary cell voltage; Its advantage is: 1, can calculate the variable quantity of internal resistance of rechargeable battery fast, to determine suitable charging current, easy, the safety of method; 2, the present invention can effectively charge to internal resistance secondary cell bigger than normal, can prolong the useful life of secondary cell.
Safety of the present invention, economic, practical and realization easily.
Description of drawings
Fig. 1 is a quickly charging battery control system circuit structure block diagram among the present invention;
Transient voltage when Fig. 2 is DC charging and electric current change waveform.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Transient voltage when accompanying drawing 2 is DC charging and electric current change waveform.During beginning, monolithic computer is controlled controlled charging current circuit and with a certain electric current I secondary cell is charged, then, and every interval certain hour charging current increment Delta I that superposes, the electric current of this stack will produce a voltage increment Δ U=U2-U1 in the internal resistance of battery, as Fig. 2.
Can approximate calculation go out the current DC internal resistance Ri of battery by formula: R ≈ (U2-U1)/(I+ Δ I-I)=Δ U/ Δ I.According to the size of the internal resistance of cell of being obtained, determine charging current I next time then
nThe adjusting strategy:
If the internal resistance R that measures for the n-1 time
N-1For greatly, promptly 30% of the measured value value of being above standard, I then
n=I
N-1
If the internal resistance R that measures for the n-1 time
N-1For bigger, promptly 1% of the measured value value of being above standard, be no more than 30% of standard value, then I
n=I
N-1+ I
d, I wherein
dBe the current unit increment;
If the internal resistance R that measures for the n-1 time
N-1For not quite, promptly measured value in standard value allows fluctuation range, I then
n=I
N-1+ kI
d, (k=2,3,4);
If continuous three measured internal resistance R
N-3, R
N-2And R
N-1All little, I then
n=I
Max, I wherein
MaxBe maximum charging current.
The present invention adopts the core of monolithic computer as control system, measures, calculates and analyze the charged state of secondary cell, the charging current of control and regulating cell; If battery or battery surface temperature surpass the voltage of set point or battery or batteries charging and occur continuously-Δ U, then make In=I
Small, finish quick charge, change trickle charge into, wherein I
SmallBe 0.05C.
Prove that by experiment the present invention not only can realize internal resistance battery bigger than normal is carried out quick charge control, can also in time find the storage battery of deterioration (internal resistance is excessive), the potential hidden danger of eliminating storage battery (or batteries).The present invention has that test is simple, convenience of calculation and be easy to the characteristics that circuit is realized, can improve the availability factor of battery effectively, is applicable to that commercialization uses and promote.
Claims (2)
1, a kind of control method for quickly charging battery, it is characterized in that: this method is when changing charging current, obtain the size of the internal resistance of cell this moment by the variation that detects secondary cell voltage, and realize the Optimal Control of quick charge according to the internal state of battery; It may further comprise the steps:
1) battery or battery pack with a certain electric current I charging process in, the moment charging current Δ I that superposes, be that charging current becomes I+ Δ I, the electric current of this stack produces a voltage increment Δ U=U2-U1 in the internal resistance of battery, measure the voltage U 1 and the U2 at charging current stack front and back battery or battery pack two ends;
2) calculate voltage increment Δ U=U2-U1 according to measured voltage U 1 and U2, obtain internal resistance of cell R this moment by Δ I and Δ U
iValue: R
i=(U2-U1)/(I+ Δ I-I)=Δ U/ Δ I.
3) according to the internal resistance of cell currency of measuring and calculating, determining to increase still is the value that keeps charging current, and determines charging current I the n time according to following fuzzy control rule
nThe adjusting strategy:
If the internal resistance R that measures for the n-1 time
N-1For greatly, I then
n=I
N-1
If the internal resistance R that measures for the n-1 time
N-1For bigger, I then
n=I
N-1+ I
d, I wherein
dBe the current unit increment;
If the internal resistance R that measures for the n-1 time
N-1For not quite, I then
n=I
N-1+ kI
d, (k=2,3,4);
If continuous three measured internal resistance R
N-3, R
N-2And R
N-1All little, I then
n=I
Max, I wherein
MaxBe maximum charging current;
4) by realize the Optimal Control of secondary cell quick charge with the adjusted strategy.
2, control method for quickly charging battery according to claim 1 is characterized in that: adopt monolithic computer as controller, measure, calculate and analyze the charged state of secondary cell, the charging current of control and regulating cell; If battery or battery surface temperature surpass the voltage of set point or battery or batteries charging and occur continuously-Δ U, then make I
n=I
Small, finish quick charge, change trickle charge into, wherein I
SmallBe 0.05C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810020413 CN101299542A (en) | 2008-03-05 | 2008-03-05 | Control method for quickly charging battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810020413 CN101299542A (en) | 2008-03-05 | 2008-03-05 | Control method for quickly charging battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101299542A true CN101299542A (en) | 2008-11-05 |
Family
ID=40079273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810020413 Pending CN101299542A (en) | 2008-03-05 | 2008-03-05 | Control method for quickly charging battery |
Country Status (1)
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|---|---|
| CN (1) | CN101299542A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924385A (en) * | 2010-08-24 | 2010-12-22 | 浙江黄岩东兴塑业有限公司 | Full-automatic intelligent charger |
| CN103515658A (en) * | 2012-06-29 | 2014-01-15 | 联想(北京)有限公司 | Rechargeable battery unit and charging management method |
| WO2016008123A1 (en) * | 2014-07-16 | 2016-01-21 | 华为技术有限公司 | Electronic device quick charging method, apparatus and device |
| CN106019165A (en) * | 2016-07-12 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | Method used to prevent battery voltage withstanding insulation test from impact of current overshoot |
| CN107804189A (en) * | 2017-11-06 | 2018-03-16 | 苏州世诚讯商贸有限公司 | A kind of electric automobile intelligent and high-efficiency charging device |
| CN109860743A (en) * | 2018-11-14 | 2019-06-07 | 维沃移动通信有限公司 | A kind of charging method and terminal device |
| CN109983354A (en) * | 2016-07-21 | 2019-07-05 | 百达力有限公司 | Battery charger and method |
| CN110297275A (en) * | 2019-06-03 | 2019-10-01 | 南京工业职业技术学院 | A kind of band AGC two-way detection fence sensor |
| CN112421702A (en) * | 2019-08-23 | 2021-02-26 | 北京小米移动软件有限公司 | Lithium battery charging method and device |
-
2008
- 2008-03-05 CN CN 200810020413 patent/CN101299542A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924385A (en) * | 2010-08-24 | 2010-12-22 | 浙江黄岩东兴塑业有限公司 | Full-automatic intelligent charger |
| CN101924385B (en) * | 2010-08-24 | 2012-12-19 | 浙江凯能科技有限公司 | Full-automatic intelligent charger |
| CN103515658A (en) * | 2012-06-29 | 2014-01-15 | 联想(北京)有限公司 | Rechargeable battery unit and charging management method |
| CN103515658B (en) * | 2012-06-29 | 2016-10-05 | 联想(北京)有限公司 | Rechargeable battery cell and charging management method |
| WO2016008123A1 (en) * | 2014-07-16 | 2016-01-21 | 华为技术有限公司 | Electronic device quick charging method, apparatus and device |
| CN105814767A (en) * | 2014-07-16 | 2016-07-27 | 华为技术有限公司 | Electronic device quick charging method, apparatus and device |
| CN105814767B (en) * | 2014-07-16 | 2019-06-28 | 华为技术有限公司 | A kind of electronic equipment fast charge method, device and equipment |
| US10333326B2 (en) | 2014-07-16 | 2019-06-25 | Huawei Technologies Co., Ltd. | Devices and methods for fast charging using determined maximum charging current values |
| CN106019165B (en) * | 2016-07-12 | 2019-03-26 | 合肥国轩高科动力能源有限公司 | A method of evading current over pulse influences battery pressure resistance Insulation test |
| CN106019165A (en) * | 2016-07-12 | 2016-10-12 | 合肥国轩高科动力能源有限公司 | Method used to prevent battery voltage withstanding insulation test from impact of current overshoot |
| CN109983354A (en) * | 2016-07-21 | 2019-07-05 | 百达力有限公司 | Battery charger and method |
| CN107804189A (en) * | 2017-11-06 | 2018-03-16 | 苏州世诚讯商贸有限公司 | A kind of electric automobile intelligent and high-efficiency charging device |
| CN109860743A (en) * | 2018-11-14 | 2019-06-07 | 维沃移动通信有限公司 | A kind of charging method and terminal device |
| CN109860743B (en) * | 2018-11-14 | 2021-05-11 | 维沃移动通信有限公司 | Charging method and terminal equipment |
| CN110297275A (en) * | 2019-06-03 | 2019-10-01 | 南京工业职业技术学院 | A kind of band AGC two-way detection fence sensor |
| CN110297275B (en) * | 2019-06-03 | 2020-09-25 | 南京工业职业技术学院 | Take AGC double-circuit to detect electronic fence sensor |
| CN112421702A (en) * | 2019-08-23 | 2021-02-26 | 北京小米移动软件有限公司 | Lithium battery charging method and device |
| CN112421702B (en) * | 2019-08-23 | 2024-04-02 | 北京小米移动软件有限公司 | Lithium battery charging method and device |
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Open date: 20081105 |