CN101640296B - Quick charging method for improving storage battery specific capacity - Google Patents
Quick charging method for improving storage battery specific capacity Download PDFInfo
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- CN101640296B CN101640296B CN2009100423698A CN200910042369A CN101640296B CN 101640296 B CN101640296 B CN 101640296B CN 2009100423698 A CN2009100423698 A CN 2009100423698A CN 200910042369 A CN200910042369 A CN 200910042369A CN 101640296 B CN101640296 B CN 101640296B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a quick charging method for improving storage battery specific capacity, belonging to the field of batteries. On the basis of quick charging from constant current I1 to stopping at U1, the method of the invention reduces quick charging flow I1 to I2, converts to constant-voltage charging after the voltage is charged to U1 and stops charging until that the current is reduced to Iz. I0 is battery 1C multiplying power current, and n is an integer selected from 1-I2/I0. Iz is as follows: Iz= I1/m, wherein, m is a positive integer not smaller than 2. The invention can be manufactured into a charger and is simple, effective, practical, easy to popularize and quick to charge and can charge electric quantity as much as possible.
Description
Technical field
A kind of fast charge method that improves storage battery specific capacity of the present invention belongs to field of batteries, particularly relates to the fast charge method of a kind of lithium ion battery, polymer Li-ion battery.
Background technology
Along with the fast development of removable power consumption equipment, also more and more higher to the capacity and the rapid charge characteristic of secondary lithium battery, for concrete a certain battery, people wish to find a kind of charging modes of taking into account charge capacity and charging interval.The charging capacity of lithium rechargeable battery with when charging the positive pole lithium amount of deviating from be directly proportional, improve the burning voltage that charging finishes the back battery, help positive pole and deviate from more lithium, to realize charging into the purpose of more electric weight.Consider that anodal cobalt acid lithium is excessive and take off that the structure of material can change behind the lithium, now the charging modes that generally adopts all be based upon and guarantee that anodal cobalt acid lithium material lithium deviates from amount and be not higher than on 55% the basis, i.e. charging finishes back battery burning voltage and is no more than 4.2V.Along with the development of lithium-ion electric pool technology, take off during synthetic charging the lithium amount surpass 55% and constitutionally stable cobalt acid lithium material become possibility, following even the lithium amount may occur taking off and reach 100% anodal cobalt acid lithium material.The CN1961450A patent disclosure a kind of cut-ff voltage that charges surpass the manufacture method of 4.35V lithium ion battery, but fail to propose the rational charging management method of this type of battery.CN1845418, CN101388562, CN101388477 etc. disclose some quick charge method, the purpose of these class methods is to adopt big electric current that battery is carried out constant current charge, simultaneously, for offsetting the polarizing voltage that large current charge produces, select to improve the cut-ff voltage of constant current charge.Though these class methods can reach the purpose of quick charge, right because its charging method is based upon the battery burning voltage and is no more than on the 4.2V basis, then seem not enough for how making battery charge into more electric weight.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of charging interval and charging capacity taken into account simply and easily is provided, in the time of with the realization quick charge, fill electric weight into as much as possible, thereby make battery can emit a kind of fast charge method that improves storage battery specific capacity of more electric weight in use.
The objective of the invention is to realize that by following scheme according to electrochemical principle, the polarization that produces in the battery charging process is directly proportional with charging current, charging current is big more, the polarization that produces is then big more, battery charge is finished after the voltage falling big more, promptly the actual electric weight that fills into of battery is few more.Therefore, electric current that reduces to charge or constant voltage charge cut-off current help the polarization that reduces to produce in the charging process, thereby make battery charge into more electric weight.
Method of the present invention is at constant current I
1Charge to U
1On the quick charge mode of ending, reduce fast charging current I
1, treat that voltage charging is to U
1Constant voltage charge is changeed in the back, after electric current descends, stops charging.
Method of the present invention is at constant current I
1Charge to U
1On the quick charge mode of ending, reduce fast charging current I
1To I
2, treat that voltage is charged to U
1The back is changeed constant voltage charge and is reduced to I until electric current
zAfter, promptly stop charging.
I
2＝I
1-ΔI (1)
ΔI＝0.5×n×I
0
That is: I
2=I
1-0.5 * n * I
0(2)
Wherein, I
0Be battery 1C multiplying power electric current; N gets 1～I respectively
2/ I
0Between integer.
I
zSelection can be:
I
z＝I
1/m (3)
Wherein m is not less than 2 positive integer.
I
1Be the required size of current of quick charge:
I
1＝60*C
r/t (4)
Wherein, C
r(mAh) be the rated capacity of battery, t (min) is full of the time of electricity for expectation;
U
1Be the constant current charge cut-ff voltage:
U
1＝2U
0-U
s， (5)
Wherein, U
0By the employed standard charging cut-ff voltage of the generally accepted little multiplying power constant current-constant voltage charging method of industry, different according to the compound mode of employed positive and negative pole material of lithium ion battery and battery, as LiCoO
2/ C is that cell is 4.2V, LiFePO
4/ C is that cell is 3.6V, U
sFor with electric current I
1Constant current is charged to U
0And leave standstill battery open circuit voltage after 10 minutes.
Δ I and I
zSelection need take into account charging interval, charging capacity, cycle performance of battery and security performance.I is too little for Δ, is difficult to realize charging into the purpose of more electric weight; Δ I is too big, will cause the battery charge time oversize, simultaneously, may cause battery more serious overcharging to occur and influences the cycle performance and the security performance of battery.I
zToo big, be difficult to realize charging into the purpose of more electric weight; I
zToo little, battery charge time lengthening may cause battery more serious overcharging to occur equally and influences the cycle performance and the security performance of battery.The value of the two needs checking by experiment and real needs to select.
Among the present invention, I
2=I
1-0.5 * n * I
0(2)
Wherein, I
0Be battery 1C multiplying power electric current; N gets 1～I respectively
2/ I
0Between integer.N is too big, then is difficult to realize the purpose of quick charge, simultaneously, may occur more serious overcharge and influencing cycle performance, the security performance of battery; N is too little, then is difficult to realize charging into the purpose of more electric weight.In actual the use, for taking into account charge capacity, charging rate, cycle performance and security performance, n more preferably 1 or 2.
Among the present invention, I
z=I
1/ m (3)
Wherein m is not less than 2 positive integer.M is too big, then is difficult to realize the purpose of quick charge, simultaneously, may occur more serious overcharge and influencing cycle performance, the security performance of battery; M is too little, then is difficult to realize charging into the purpose of more electric weight.In actual the use, for taking into account charge capacity, charging rate, cycle performance and security performance, m more preferably 2 or 3.
A kind of fast charge method that improves storage battery specific capacity of the present invention can be made charger.Utilize the inventive method can make electronic devices and components, use with electric core assembling.
The present invention carries out the short time constant voltage charge by reducing fast charging current in quick charge latter stage, in the time of with the realization quick charge, fills electric weight into as much as possible, thereby makes battery can emit more electric weight in use.
The present invention is simple, effectively, practical, be easy to promote, charging is fast and can fill electric weight into as much as possible.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
501417HS10C high magnification type polymer Li-ion battery, rated capacity 50mAh, 1C multiplying power electric current is 50mA.
According to formula (4), selected original constant current fast charging current I
1Be 4C multiplying power electric current (200mA), obtain constant current charge cut-ff voltage U according to formula (5)
1Be 4.36V.
According to formula (2), (3), choosing the n value respectively is 1,2, and the m value is 2,3,4, obtains the constant current charge electric current I
2Be respectively 175mA, 150mA; Constant voltage (4.36V) charging cut-off current is respectively 100mA, 66.7mA, 50mA.
Table 1
| Charging modes | Charging system | Charging interval (min) | C 1(mAh) | Cycle-index N (week) | Circulation back 10C10V overcharges |
| Performance | |||||
| 1 | Original system: the 200mA constant current charge ends to 4.36V | 16.8 | 55.1 | 310 | Do not fire not quick-fried |
| 2 | When n=1, m=2: 175mA constant current charge constant voltage charge to the 4.36V ends to 100mA | 20.8 | 59.2 | 271 | Do not fire not quick-fried |
| 3 | When n=1, m=3: 175mA constant current charge constant voltage charge to the 4.36V ends to 66.7mA | 24.3 | 63.0 | 220 | Do not fire not quick-fried |
| 4 | When n=1, m=4: 175mA constant current charge constant voltage charge to the 4.36V ends to 50mA | 31.2 | 65.1 | 183 | 1/10 burning |
| 5 | When n=2, m=2: 150mA constant current charge constant voltage charge to the 4.36V ends to 100mA | 24.6 | 60.5 | 260 | Do not fire not quick-fried |
| 6 | When n=2, m=3: 150mA constant current charge constant voltage charge to the 4.36V ends to 66.7mA | 27.5 | 64.3 | 207 | Do not fire not quick-fried |
| 7 | When n=2, m=4: 150mA constant current charge constant voltage charge to the 4.36V ends to 50mA | 33.7 | 69.1 | 146 | 3/10 burning |
Annotate: above-mentioned all discharge systems are 1.0C (50mA) constant-current discharge to be ended to 3.0V.C in the table
1Be discharge capacity first; N is the largest loop week number that discharge capacity is not less than 80% initial capacity.
Can know that according to table 1 data when n is 1, m is respectively, at 2,3,4 o'clock, the C of discharge capacity first of battery
1More original discharge capacity has improved 7.44%, 14.34%, 18.15% respectively; N is 2, and m is respectively, 2,3,4 o'clock, the C of discharge capacity first of battery
1More original discharge capacity has improved 9.80%, 16.70%, 25.41% respectively.Can select corresponding charging modes according to different demands in actual the use, relatively low as cycle life and charging rate are required, but the charging modes 6 in the option table then, battery safety is secure simultaneously; Take into account charging interval, life-span, capacity as need, but charging modes 3 or 5 in the option table, and battery safety is secure simultaneously.
Embodiment 2
452026HS10C high magnification type polymer Li-ion battery, rated capacity 130mAh, 1C multiplying power electric current is 130mA.
According to formula (4), selected original constant current fast charging current I
1Be 6C multiplying power electric current (780mA), obtain constant current charge cut-ff voltage U according to formula (5)
1Be 4.41V.
According to formula (2), (3), choosing the n value respectively is 1,2, and the m value is 2,3,4, obtains the constant current charge electric current I
2Be respectively 715mA, 650mA; Constant voltage (4.41V) charging cut-off current is respectively 390mA, 260mA, 195mA.
Table 2
| Charging modes | Charging system | Charging interval (min) | C 1(mAh) | Cycle-index N (week) | Circulation back 10C10V over-charging |
| 1 | Original system: the 780mA constant current charge ends to 4.41V | 10.4 | 135.2 | 306 | Do not fire not quick-fried |
| 2 | When n=1, m=2: 715mA constant current charge constant voltage charge to the 4.41V ends to 390mA | 12.0 | 141.7 | 257 | Do not fire not quick-fried |
| 3 | When n=1, m=3: 715mA constant current charge constant voltage charge to the 4.41V ends to 260mA | 13.2 | 150.9 | 181 | Do not fire not quick-fried |
| 4 | When n=1, m=4: 715mA constant current charge constant voltage charge to the 4.41V ends to 195mA | 14.7 | 161.4 | 81 | 3/10 burning |
| 5 | When n=2, m=2: 650mA constant current charge constant voltage charge to the 4.41V ends to 390mA | 13.5 | 146.1 | 260 | Do not fire not quick-fried |
| 6 | When n=2, m=3: 650mA constant current charge constant voltage charge to the 4.41V ends to 260mA | 14.7 | 154.9 | 157 | Do not fire not quick-fried |
| 7 | When n=2, m=4: 650mA constant current charge constant voltage charge to the 4.41V ends to 195mA | 16.0 | 163.2 | 62 | 5/10 burning |
Annotate: above-mentioned all discharge systems are 1.0C (130mA) constant-current discharge to be ended to 3.0V.C in the table
1Be discharge capacity first; N is the largest loop week number that discharge capacity is not less than 80% initial capacity.
Can know that according to table 2 data when n is 1, m is respectively, at 2,3,4 o'clock, the C of discharge capacity first of battery
1More original discharge capacity has improved 4.81%, 11.62%, 19.35% respectively; N is 2, and m is respectively, 2,3,4 o'clock, the C of discharge capacity first of battery
1More original discharge capacity has improved 8.06%, 14.55%, 20.72% respectively.Can select corresponding charging modes according to different demands in actual the use, high as far as possible as capacity requirement, cycle life and charging rate are required relatively low, but the charging modes 6 in the option table then, battery safety is secure simultaneously; Take into account charging interval, life-span, capacity as need, but charging modes 3 or 5 in the option table, and battery safety is secure simultaneously.
Claims (2)
1. one kind is improved LiCoO
2The fast charge method of/C storage battery specific capacity is at constant current I
1Charge to U
1On the charging modes that ends, it is characterized in that reducing charging current I
1, reduce charging current I
1To I
2, treat that voltage charging is to U
1The back is changeed constant voltage charge to electric current and is reduced to I
zAfter, stop charging,
I
2＝I
1-ΔI (1)
That is: I
2=I
1-0.5 * n * I
0(2)
Wherein, I
0Be battery 1C multiplying power electric current; N selects 1 or 2,
I
zFor: I
z=I
1/ m (3)
Wherein m selects 2 or 3,
I
1Be the required size of current of charging, I
1=60*C
r/ t, C
rBe the rated capacity of battery, its unit is mAh; T is full of the electric time for expectation, and its unit is min;
U
1Be constant current charge cut-ff voltage, U
1=2U
0-U
s, LiCoO
2/ C is cell U
0Be 4.2V, U
sFor with electric current I
1Constant current is charged to U
0And leave standstill battery open circuit voltage after 10 minutes.
2. one kind is improved LiFePO
4The fast charge method of/C storage battery specific capacity is at constant current I
1Charge to U
1On the charging modes that ends, it is characterized in that reducing charging current I
1, reduce charging current I
1To I
2, treat that voltage charging is to U
1The back is changeed constant voltage charge to electric current and is reduced to I
zAfter, stop charging,
I
2＝I
1-ΔI (1)
That is: I
2=I
1-0.5 * n * I
0(2)
Wherein, I
0Be battery 1C multiplying power electric current; N selects 1 or 2,
I
zFor: I
z=I
1/ m (3)
Wherein m selects 2 or 3,
I
1Be the required size of current of charging, I
1=60*C
r/ t, C
rBe the rated capacity of battery, its unit is mAh; T is full of the electric time for expectation, and its unit is min;
U
1Be constant current charge cut-ff voltage, U
1=2U
0-U
s, LiFePO
4/ C is cell U
0Be 3.6V, U
sFor with electric current I
1Constant current is charged to U
0And leave standstill battery open circuit voltage after 10 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100423698A CN101640296B (en) | 2009-08-28 | 2009-08-28 | Quick charging method for improving storage battery specific capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100423698A CN101640296B (en) | 2009-08-28 | 2009-08-28 | Quick charging method for improving storage battery specific capacity |
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| Publication Number | Publication Date |
|---|---|
| CN101640296A CN101640296A (en) | 2010-02-03 |
| CN101640296B true CN101640296B (en) | 2011-09-28 |
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808987A (en) * | 2016-09-08 | 2018-03-16 | 宁德新能源科技有限公司 | Secondary battery charging method |
| EP3627651A4 (en) * | 2018-05-31 | 2020-07-01 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging method, and charging device |
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|---|---|---|---|---|
| CN102723534A (en) * | 2011-03-31 | 2012-10-10 | 广州丰江电池新技术股份有限公司 | Rapid charging method of rechargeable batteries |
| CN105048019A (en) * | 2015-09-22 | 2015-11-11 | 宁德新能源科技有限公司 | Charging method for lithium ion battery |
| CN106655396B (en) | 2017-01-13 | 2019-02-12 | Oppo广东移动通信有限公司 | Charge control method, device and terminal |
| WO2019109283A1 (en) * | 2017-12-07 | 2019-06-13 | 广州丰江电池新技术股份有限公司 | Lithium ion battery charging method for correcting compensation voltage |
| CN110383618A (en) * | 2018-09-12 | 2019-10-25 | Oppo广东移动通信有限公司 | Charge management circuit, terminal and charging method |
| CN110797577B (en) * | 2019-10-29 | 2020-10-09 | 中兴高能技术有限责任公司 | Lithium ion battery charging method and device and computer storage medium |
| WO2022133975A1 (en) * | 2020-12-25 | 2022-06-30 | 宁德新能源科技有限公司 | Charging method, electronic apparatus, and storage medium |
-
2009
- 2009-08-28 CN CN2009100423698A patent/CN101640296B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808987A (en) * | 2016-09-08 | 2018-03-16 | 宁德新能源科技有限公司 | Secondary battery charging method |
| EP3627651A4 (en) * | 2018-05-31 | 2020-07-01 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging method, and charging device |
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| Publication number | Publication date |
|---|---|
| CN101640296A (en) | 2010-02-03 |
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Address after: 511475, Guangdong, Guangzhou province Nansha District Tung Chung Town fine Lek Village (factory building two) (plant three) Patentee after: Guangzhou FULLRIVER Battery New Technology Co., Ltd. Address before: 511400, Guangzhou, Guangdong province Panyu District City Bridge South Street South Embankment Road, No. 22 Patentee before: Guangzhou FULLRIVER Battery New Technology Co., Ltd. |