CN107808987A - Secondary battery charging method - Google Patents
Secondary battery charging method Download PDFInfo
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- CN107808987A CN107808987A CN201610809759.3A CN201610809759A CN107808987A CN 107808987 A CN107808987 A CN 107808987A CN 201610809759 A CN201610809759 A CN 201610809759A CN 107808987 A CN107808987 A CN 107808987A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a kind of secondary battery charging method, and it includes：To secondary cell constant-current charge to limitation voltage VZ, wherein, VZMore than known constant-current charge limitation voltage V0；To secondary cell with voltage VZCarry out constant-voltage charge, constant-voltage charge current reduction to termination electric current IZWhen stop charging, wherein, terminate electric current IZElectric current I is terminated more than known constant-voltage charge0.Compared with prior art, by being set in constant-current constant-voltage charging method, certain constant-current charge limits voltage to secondary battery charging method of the present invention and constant-voltage charge terminates electric current, reduce the time of battery charging process high voltage appearance charging, on the premise of battery capacity is not lost, the charging rate of battery is significantly improved, effectively extends the service life of battery.
Description
Technical field
The invention belongs to secondary cell field, it is more particularly related to a kind of secondary battery charging method.
Background technology
Lithium ion battery or polymer Li-ion battery have charging limitation voltage, charging known to one to adopt in charging
Carried out with the mode of constant current constant voltage, i.e.,：Constant-current charge is first used, is changed to limit with known charging when being charged to known charging limitation voltage
Voltage constant-voltage charge processed, at this moment charging current be gradually reduced, when being reduced to 0.01C~0.05C stop charging.In constant-current charge
Stage, battery both end voltage are made up of two parts, and a part is the burning voltage between battery plus-negative plate, and another part is by ohm
The voltage difference that internal resistance, concentration polarization and activation polarization are brought.In constant voltage charging phase, charging current is gradually reduced, in ohm
Damping drop reduces, and concentration polarization pressure drop also reduces, when charging current is reduced to 0.05C, pressure drop on Ohmic resistance and various
Polarization pressure drop is all reduced to very little, reaches negligible degree, and two interelectrode burning voltage of battery reaches approximately known
Charging limitation voltage.The time length of this charging modes charging interval length, especially constant voltage charging phase, and constant-voltage charge process
In, battery is constantly in high-voltage state, and the service life of battery is by strong influence.Therefore, it is necessary to improve constant-current charge
Time simultaneously shortens constant voltage charging time as far as possible, and to reduce the time of whole charging process, this aspect can be realized to secondary lithium
The emergent quick charge of battery, it on the other hand can also extend the service life of battery core, especially in the higher environment of temperature
Service life.
Some published secondary cell charging techniques have directly abandoned constant-voltage charge process, and are entered using simple constant current
Row charging.One of which high current constant-current charge method, its final voltage to charge are more than known charging and limit voltage, charging
Time thus shortens, but battery can not be fully charged in some cases, and use range is restricted.Another constant-current charge method
Improve charging rate by improving the limitation voltage of constant-current charge, but its unmanageable charging capacity whether with the specified appearance of battery core
Amount is consistent, and easily produces local the problem of overcharging.These simple constant-current charge methods disappear due to no constant-voltage charge process
Except the polarization that large current charge is brought influences, the service life of battery core is caused to be restricted.
The method that researcher proposes many secondary cell quick charges for many years, some in these methods are only capable of in spy
Different applications, charger made of some methods using cumbersome or expensive or inapplicable because being unable to popularization and application.
In view of this, it is necessary to which a kind of secondary battery charging method that can solve the problem that above mentioned problem is provided.
The content of the invention
It is an object of the invention to：Overcome the deficiencies in the prior art, there is provided a kind of secondary battery charging method, this method are filled
Electric speed is fast, and can effectively extend the service life of secondary cell.
In order to realize foregoing invention purpose, the present invention provides a kind of secondary battery charging method, and it comprises the following steps：
Step 1, to secondary cell constant-current charge to limitation voltage VZ, wherein, VZVoltage is limited more than known constant-current charge
V0；
Step 2, to the secondary cell in step 1 with voltage VZConstant-voltage charge is carried out, constant-voltage charge current reduction is to eventually
Only electric current IZWhen stop charging, wherein, terminate electric current IZElectric current I is terminated more than known constant-voltage charge0。
One kind as secondary battery charging method of the present invention is improved, and methods described also includes secondary cell being placed in 12~
Step in 45 DEG C of environment, this step are completed before step 1.
One kind as secondary battery charging method of the present invention is improved, the limitation voltage V of the step 1ZMeet relation VZ
=V0+ Δ V, wherein, 0V<ΔV<0.1V.
One kind as secondary battery charging method of the present invention is improved, the termination electric current I of the step 2ZMeet relations IZ
=I0× n, wherein, 1<n<10.
One kind as secondary battery charging method of the present invention is improved, and the step 2 is specifically, to secondary cell with electricity
Press VZConstant-voltage charge is carried out, if constant-voltage charge current reduction terminates electric current I to known constant-voltage charge0Before, battery capacity QZWith public affairs
Know charging capacity Q0Meet 0.98Q0<QZ<1.02Q0, then charging is stopped, charging current when stopping charging is to terminate electric current IZ。
One kind as secondary battery charging method of the present invention is improved, and secondary cell constant-current charge is arrived in the step 1
Limit voltage VZ, specially to secondary cell with the rate of charge constant-current charge more than 0.5C to limitation voltage VZ。
One kind as secondary battery charging method of the present invention is improved, the known constant-current charge limitation electricity in the step 1
Press V0For 2.0~5.0V.
One kind as secondary battery charging method of the present invention is improved, and the anode of the secondary cell in the step 1 is stone
One kind in ink, soft carbon and hard carbon, negative electrode are one kind in cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide and nickle cobalt lithium manganate, known perseverance
Current charge limitation voltage V0For 4.2~5.0V.
One kind as secondary battery charging method of the present invention is improved, and the anode of the secondary cell in the step 1 is stone
Ink, negative electrode are LiFePO4, known constant-current charge limitation voltage V0For 3.6~3.8V.
One kind as secondary battery charging method of the present invention is improved, and the known constant-voltage charge in the step 2 terminates electricity
Flow I0For 0.01~0.1C.
Compared with prior art, secondary battery charging method of the present invention has following technique effect：By in constant current constant voltage
Set certain constant-current charge to limit voltage and constant-voltage charge termination electric current in charging method, reduce high in battery charging process
The time of voltage charging, on the premise of battery capacity is not lost, the charging rate of battery is significantly improved, effectively extends electricity
The service life in pond.
Brief description of the drawings
With reference to the accompanying drawings and detailed description, secondary battery charging method of the present invention and its advantageous effects are entered
Row describes in detail.
Fig. 1 is the flow chart of secondary battery charging method of the present invention.
Fig. 2 is constant-current charge voltage and constant-voltage charge of the embodiment 1 with comparative example 1 of secondary battery charging method of the present invention
The curve map of electric current.
Fig. 3 is the curve map of the embodiment 1 and the charging capacity of comparative example 1 of secondary battery charging method of the present invention.
Fig. 4 is the embodiment 1 and the curve map of the capability retention of comparative example 1 of secondary battery charging method of the present invention.
Embodiment
In order that goal of the invention, technical scheme and the technique effect of the present invention become apparent from understanding, below in conjunction with accompanying drawing and
Embodiment, the present invention will be described in further detail.It should be appreciated that the specific implementation described in this specification
Mode is not intended to limit the present invention just for the sake of explaining the present invention.
It refer to shown in Fig. 1, secondary battery charging method of the present invention comprises the following steps.
Step 101, secondary cell is placed in 12~45 DEG C of environment.
Step 103, to secondary cell with the rate of charge constant-current charge more than 0.5C to limitation voltage VZ, VZMeet relation：
VZ=V0+ Δ V, wherein, 0V<ΔV<0.1V.
Step 105, to secondary cell with voltage VZCarry out constant-voltage charge, constant-voltage charge current reduction to termination electric current IZWhen
Stop charging, terminate electric current IZMeet relations IZ=I0× n, wherein, 1<n<10.
Can be first to secondary cell with voltage V during practical operationZConstant-voltage charge is carried out, if constant-voltage charge current reduction is to public
Know that constant-voltage charge terminates electric current I0Before, battery capacity QZWith known charging capacity Q0Meet 0.98Q0<QZ<1.02Q0, then stop
Charging, charging current when stopping charging are to terminate electric current IZ。
It is the embodiment of secondary battery charging method of the present invention below.
Embodiment 1
Step 201, manufactured secondary cell is placed in 45 DEG C of isoperibol.
The anode of secondary cell is graphite, and negative electrode is cobalt acid lithium.At 25 DEG C, specified charging capacity Q is filled in expiring for secondary cell0
For 3730mAh, blanking voltage V is completely filled0For 4.45V.
Step 203, to secondary cell with 1.5C rate of charge constant-current charge to limitation voltage 4.48V.
Step 205, secondary cell is charged with 4.48V constant-voltage charges to electric current 0.746A, stopping is terminated.
Comparative example 1
Comparative example 1 uses step substantially the same manner as Example 1, and the limitation voltage for differing only in constant-current charge is
4.45V, the termination electric current of constant-voltage charge are 0.187A.
The curve that Fig. 2 changes over time for the voltage of constant-current charge and the electric current of constant-voltage charge of embodiment 1 and comparative example 1
Figure.As seen from the figure, shorten relative to comparative example 1, the time of the constant voltage charging phase of embodiment 1.
Fig. 3 is charging capacity SOC time history plots in the charging process of embodiment 1 and comparative example 1.Can by figure
See, relative to comparative example 1, the expiring of embodiment 1 fills the charging interval and foreshorten to 54min by 71min.
In order to examine the technique effect that secondary battery charging method of the present invention is reached, charged with embodiment 1 and comparative example 1
Secondary cell afterwards under 45 DEG C of constant temperature, is done 1000 times to test object with 1C multiplying power respectively as test object
Cycle charge discharge electrical testing, test result is as shown in Figure 4 and Table 1.From table, relative to comparative example 1, embodiment 1 is 1000
Its capability retention increases to 82% by 72% after secondary charge and discharge cycles.
Table 1, the charging interval of embodiment and comparative example and capability retention contrast
Embodiment 2
Step 301, manufactured secondary cell is placed in 25 DEG C of isoperibol.
The anode of secondary cell is graphite, and negative electrode is cobalt acid lithium.At 25 DEG C, specified charging capacity Q is filled in expiring for secondary cell0
For 3500mAh, blanking voltage V is completely filled0For 4.40V.
Step 303, to secondary cell with 2C rate of charge constant-current charge to limitation voltage 4.45V.
Step 305, secondary cell is charged with 4.45V constant-voltage charges to electric current 0.81A, stopping is terminated.
Comparative example 2
Comparative example 2 uses step substantially the same manner as Example 2, and the limitation voltage for differing only in constant-current charge is
4.40V, the termination electric current of constant-voltage charge are 0.175A.
Equally, the secondary cell after being charged using embodiment 2 and comparative example 2 is as test object, in 25 DEG C of constant temperature
Under, do the cycle charge discharge electrical testing of 1000 times with 1C multiplying power to test object respectively.
It is as shown in table 1 that the expiring of embodiment 2 and comparative example 2, fills the test result of time and charge-discharge test.From table,
Relative to comparative example 2, the expiring of embodiment 2, fills the charging interval and foreshortens to 62min by 78min, and capability retention is increased to by 83%
87%.
Embodiment 3
Step 401, manufactured secondary cell is placed in 25 DEG C of isoperibol.
The anode of secondary cell is graphite, and negative electrode is LiFePO4.At 25 DEG C, specified charging capacity is filled in expiring for secondary cell
Q0For 1850mAh, blanking voltage V is completely filled0For 3.70V, (the known constant-current charge of this battery system limits voltage V0For 3.6~
3.8V)。
Step 403, to secondary cell with 3C rate of charge constant-current charge to limitation voltage 3.80V.
Step 405, secondary cell is charged with 3.80V constant-voltage charges to electric current 0.63A, stopping is terminated.
Comparative example 3
Comparative example 3 uses step substantially the same manner as Example 3, and the limitation voltage for differing only in constant-current charge is
3.70V, the termination electric current of constant-voltage charge are 0.093A.
Equally, the secondary cell after being charged using embodiment 3 and comparative example 3 is as test object, in 25 DEG C of constant temperature
Under, do the cycle charge discharge electrical testing of 1000 times with 1C multiplying power to test object respectively.
It is as shown in table 1 that the expiring of embodiment 3 and comparative example 3, fills the test result of time and charge-discharge test.From table,
Relative to comparative example 3, the expiring of embodiment 3, fills the charging interval and foreshortens to 50min by 58min, and capability retention is increased to by 90%
94%.
Embodiment 4
Step 501, manufactured secondary cell is placed in 12 DEG C of isoperibol.
The anode of secondary cell is graphite, and negative electrode is cobalt acid lithium.At 25 DEG C, specified charging capacity Q0 is filled in expiring for secondary cell
For 2870mAh, it is 4.35V completely to fill blanking voltage V0.
Step 503, to secondary cell with 1.5C rate of charge constant-current charge to limitation voltage 4.37V.
Step 505, secondary cell is charged with 4.37V constant-voltage charges to electric current 0.19A, stopping is terminated.
Comparative example 4
Comparative example 4 uses step substantially the same manner as Example 4, and the limitation voltage for differing only in constant-current charge is
4.35V, the termination electric current of constant-voltage charge are 0.14A.
Equally, the secondary cell after being charged using embodiment 4 and comparative example 4 is as test object, in 12 DEG C of constant temperature
Under, do the cycle charge discharge electrical testing of 1000 times with 1C multiplying power to test object respectively.
It is as shown in table 1 that the expiring of embodiment 4 and comparative example 4, fills the test result of time and charge-discharge test.From table,
Relative to comparative example 4, the expiring of embodiment 4, fills the charging interval and foreshortens to 97min by 112min, and capability retention is increased to by 80%
85%.
It should be noted that the anode of secondary cell is graphite in embodiment 1,2 and 4, its negative electrode may be used also in addition to cobalt acid lithium
Think LiMn2O4, lithium nickel cobalt dioxide or nickle cobalt lithium manganate etc., the known constant-current charge limitation voltage V of this battery system0For 4.2~
5.0V.In general, the known constant-current charge limitation voltage V of the battery system of secondary cell0Between 2V to 5V, known constant pressure
Charging termination electric current I0Between 0.01C to 0.1C.
The limitation voltage that high current constant-current charge is improved it can be seen from above example and comparative example (is more than known
Limit voltage), time of constant-current charge can be extended, and under more than known limitation voltage conditions constant-voltage charge, improve eventually
Only electric current (be more than known constant-voltage charge and terminate electric current) can shorten constant voltage charging time, integrally be charged so as to reach reduction battery
The purpose of time.Meanwhile constant voltage charging time is shorter, then the time that battery charges under high temperature high-voltage state is shorter, and this has
Beneficial to the improvement of battery cycle life.
Relative to prior art, secondary battery charging method of the invention in constant-current constant-voltage charging method by setting one
Fixed constant-current charge limitation voltage and constant-voltage charge terminate electric current, reduce the time of battery charging process high voltage appearance charging,
On the premise of battery capacity is not lost, the charging rate of battery is significantly improved, effectively extends the service life of battery.
According to above-mentioned principle, the present invention can also carry out appropriate change and modification to above-mentioned embodiment.Therefore, this hair
It is bright to be not limited to embodiment disclosed and described above, some modifications and changes of the present invention should also be as falling into this
In the scope of the claims of invention.In addition, although used some specific terms in this specification, but these terms
Merely for convenience of description, any restrictions are not formed to the present invention.
Claims (10)
- A kind of 1. secondary battery charging method, it is characterised in that：It the described method comprises the following steps：Step 1, to secondary cell constant-current charge to limitation voltage VZ, wherein, VZMore than known constant-current charge limitation voltage V0；Step 2, to the secondary cell in step 1 with voltage VZCarry out constant-voltage charge, constant-voltage charge current reduction to termination electric current IZWhen stop charging, wherein, terminate electric current IZElectric current I is terminated more than known constant-voltage charge0。
- 2. secondary battery charging method according to claim 1, it is characterised in that：Methods described is also included secondary cell The step being placed in 12~45 DEG C of environment, this step are completed before step 1.
- 3. secondary battery charging method according to claim 1, it is characterised in that：The limitation voltage V of the step 1ZIt is full Sufficient relation VZ=V0+ Δ V, wherein, 0V<ΔV<0.1V.
- 4. secondary battery charging method according to claim 1, it is characterised in that：The termination electric current I of the step 2ZIt is full Sufficient relations IZ=I0× n, wherein, 1<n<10.
- 5. secondary battery charging method according to claim 1, it is characterised in that：The step 2 is specifically, to secondary Battery is with voltage VZConstant-voltage charge is carried out, if constant-voltage charge current reduction terminates electric current I to known constant-voltage charge0Before, battery holds Measure QZWith known charging capacity Q0Meet 0.98Q0<QZ<1.02Q0, then charging is stopped, charging current when stopping charging is eventually Only electric current IZ。
- 6. secondary battery charging method according to claim 1, it is characterised in that：It is permanent to secondary cell in the step 1 Current charge to limitation voltage VZ, specially to secondary cell with the rate of charge constant-current charge more than 0.5C to limitation voltage VZ。
- 7. secondary battery charging method according to claim 1, it is characterised in that：Known constant current in the step 1 is filled Electricity limitation voltage V0For 2.0~5.0V.
- 8. secondary battery charging method according to claim 7, it is characterised in that：Secondary cell in the step 1 Anode is one kind in graphite, soft carbon and hard carbon, and negative electrode is one in cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide and nickle cobalt lithium manganate Kind, known constant-current charge limitation voltage V0For 4.2~5.0V.
- 9. secondary battery charging method according to claim 7, it is characterised in that：Secondary cell in the step 1 Anode is graphite, and negative electrode is LiFePO4, known constant-current charge limitation voltage V0For 3.6~3.8V.
- 10. secondary battery charging method according to claim 1, it is characterised in that：Known constant pressure in the step 2 Charging termination electric current I0For 0.01~0.1C.
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| CN110085936A (en) * | 2019-06-05 | 2019-08-02 | 安普瑞斯（无锡）有限公司 | A kind of fast charge method |
| WO2019227419A1 (en) * | 2018-05-31 | 2019-12-05 | Oppo广东移动通信有限公司 | Charging method, and charging device |
| CN112366374A (en) * | 2019-12-02 | 2021-02-12 | 万向一二三股份公司 | Charging and discharging method for lithium ion power battery |
| CN112740500A (en) * | 2019-10-21 | 2021-04-30 | 宁德新能源科技有限公司 | Charging method, electronic device, and storage medium |
| CN112946501A (en) * | 2019-12-11 | 2021-06-11 | 珠海冠宇电池股份有限公司 | Method for rapidly testing cycle life of lithium ion battery |
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| CN113948783A (en) * | 2021-10-12 | 2022-01-18 | 远景动力技术(江苏)有限公司 | Lithium ion battery and pre-circulation activation method thereof |
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| CN113904399A (en) * | 2021-09-03 | 2022-01-07 | 荣耀终端有限公司 | Charging method and terminal equipment |
| CN113904399B (en) * | 2021-09-03 | 2022-10-14 | 荣耀终端有限公司 | Charging method and terminal equipment |
| CN113948783B (en) * | 2021-10-12 | 2023-12-01 | 远景动力技术(江苏)有限公司 | Lithium ion battery and pre-cycling activation method thereof |
| CN113948783A (en) * | 2021-10-12 | 2022-01-18 | 远景动力技术(江苏)有限公司 | Lithium ion battery and pre-circulation activation method thereof |
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Application publication date: 20180316 |