CN110061315A - A kind of lithium ion battery fast charge method - Google Patents
A kind of lithium ion battery fast charge method Download PDFInfo
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- CN110061315A CN110061315A CN201910246149.0A CN201910246149A CN110061315A CN 110061315 A CN110061315 A CN 110061315A CN 201910246149 A CN201910246149 A CN 201910246149A CN 110061315 A CN110061315 A CN 110061315A
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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
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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
- H01M10/443—Methods for charging or discharging in response to temperature
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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)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention discloses a kind of lithium ion battery fast charge method, analysis lithium boundary window when key step is included: S1, prepares three-electrode battery S2 using three-level battery preparation technique, charged using three-electrode battery acquisition lithium ion battery；S3, a quick ladder charging strategy is designed according to the analysis lithium boundary window；S4, it is charged using above-mentioned quick ladder charging strategy to lithium ion battery.Battery to be charged, which is obtained, using three-electrode battery analyses lithium boundary window; quick ladder charging strategy is designed for this analysis lithium boundary window again; the quick ladder charging strategy can allow charging curve in the entire charging process of battery to meet three law of Maas as far as possible; charging current is allowed close to optimal charge curve, to control the polarization phenomena of battery as best one can, so that battery be made not occur to analyse lithium phenomenon in charging; shorten the charging time; safety is improved, battery life, effective protection battery are extended.
Description
Technical field
The present invention relates to power battery energy storage technology more particularly to a kind of lithium ion battery fast charge methods.
Background technique
The purpose of battery charging is the electricity in order to reply battery in battery level deficiency, enables battery persistently right
Outer power supply, theoretically, electric current is bigger, and battery is filled fastlyer.Battery charging is generally divided into normal charge and quick charge, at present
Most common fast charge method includes constant-current constant-voltage charging and two kinds of pulse charge, constant-current constant-voltage charging be exactly the first stage with
Constant current charges to lithium ion battery；It is transferred to second stage when voltage reaches predetermined value and carries out constant-voltage charge, at this time
Electric current is gradually reduced；When charging current drops to zero, battery is completely filled with, and pulse charge is then first with pulse current pair
Battery charging, the charging process of battery are commonly divided into precharge, quick charge, supply charging, trickle charge four-stage.?
In traditional constant-current constant-voltage charging method, if charging current is excessively high, the polarization phenomena of battery cross aggravation, the polarization phenomena of battery
It is divided into ohmic polarization, concentration polarization, activation polarization, ohmic polarization remains unchanged in the entire charging process of battery, and dense
Difference polarization is with activation polarization as the charge and discharge cycles process of battery is more strong, and phenomenon makes battery temperature under serious polarization
Degree quickly increases, and external presentation is internal resistance increase, so as to cause the decline of battery charge acceptance, influences battery charging effect
Rate, serious polarization phenomena even make battery phenomenon under analysis lithium occur, cause the loss of active lithium, cause to battery irreversible
Damage, there are great security risks.And the shortcomings that pulse charge, is that stage pulse charging is more than upper limit voltage, it may occur that mistake
Fill, analyse the security risk of lithium, as soon as and in order to ensure the power supply of security needs current-limiting function, this will increase pulse charging manner
Cost.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of lithium ion battery fast charge method, and this method makes battery whole
Charging curve meets three law of Maas as far as possible in a charging process, that is, allows charging current as best one can close to optimal charge curve,
The polarization phenomena of battery are controlled, so that battery be made not occur to analyse lithium phenomenon in charging, shortens the charging time, improves safety,
Extend battery life, effective protection battery.
A kind of lithium ion battery fast charge method disclosed by the invention, the specific steps of which are as follows:
S1, three-electrode battery is prepared using conventional process；
S2, using three-electrode battery obtain lithium ion battery charge when analysis lithium boundary window；
S3, a quick ladder charging strategy is designed according to the analysis lithium boundary window；
S4, it is charged using above-mentioned quick ladder charging strategy to lithium ion battery
Further, when being charged under different temperatures, different charging currents using three-electrode battery acquisition battery to be charged
Analysis lithium initial state, i.e., analysis lithium voltage boundary window；
Further, judge that analysing condition used in lithium boundary is: during the charging process, the cathode and reference electrode of lithium ion battery
The as boundary condition of cathode analysis lithium when surveyed current potential is reduced to 0；
Further, the quick ladder charging strategy is that battery core to be charged is charged with electric current I1, reaches I1 in voltage
Before corresponding analysis lithium boundary voltage, switching charging current continues to charge to I2, reaches analysis corresponding to electric current I2 in voltage
Before lithium boundary voltage, switching electric current continues to charge to I3, voltage reach analysis lithium boundary voltage corresponding to electric current I3 it
Before, then switching electric current is to In, it is up to reaching 100%SOC state, i.e., fully charged；
Further, I1 > I2 > I3 > ... the > In；
The utility model has the advantages that
The present invention provides a kind of lithium ion battery fast charge method, obtains battery to be charged using three-electrode battery and analyses lithium boundary
Window, then quick ladder charging strategy is designed for this analysis lithium boundary window, which can allow battery entire
Charging curve meets three law of Maas as far as possible in charging process, that is, allows charging current as best one can close to optimal charge curve, control
The polarization phenomena of battery processed shorten the charging time, improve safety, prolong so that battery be made not occur to analyse lithium phenomenon in charging
Long battery life, effective protection battery.
Detailed description of the invention
Fig. 1 is lithium ion charging current optimal charge curve graph
Fig. 2 is fast charge method flow chart of the present invention
Fig. 3 is the voltage curve that the different multiplying of fast charge method of the present invention charges
Fig. 4 is fast charge method charge graph of the present invention.
Specific embodiment
In order to make method of the invention, purpose, beneficial effect be easier to be understood and implemented, below in conjunction with specific implementation
Mode is described in further details technical thought and technical solution of the invention, but the present embodiment is used only for explaining this hair
It is bright, it is not intended to restrict the invention.
As shown in Fig. 2, a kind of lithium ion battery fast charge method disclosed by the invention, the specific steps of which are as follows:
S1, three-electrode battery is prepared using conventional process；
S2, using three-electrode battery obtain lithium ion battery charge when analysis lithium boundary window；
S3, a quick ladder charging strategy is designed according to the analysis lithium boundary window；
S4, it is charged using above-mentioned quick ladder charging strategy to lithium ion battery
Further, make the method for three-electrode battery are as follows: 1. using 78% ~ 85% concentration the concentrated sulfuric acid to enameled wire (copper wire) into
Then row oxidation processes 2-4h cleans the concentrated sulfuric acid on copper wire surface with deionized water, then carries out ultrasound to copper wire with dehydrated alcohol
Cleaning further removes the greasy dirt on copper wire surface；2. the naked battery core of winding is opened, by copper wire lithium ion battery every
From being attached to again with gummed paper on the close diaphragm of anode after film cladding, copper wire is allowed to expose battery core surface, it is ensured that copper wire is not and just
Negative electrode tab and the contact of positive and negative anodes tab, to prevent short circuit；3. treated naked battery core carries out sealer, baking, fluid injection, change
At, preparation sections such as two envelopes, partial volume, finally the copper wire for stretching out battery surface is fixed on additional nickel tab by soldering,
Reference electrode is made；4. carrying out plating lithium, three electrodes to above-mentioned reference electrode with the low current of < 0.1C using button electrical testing cabinet
Battery completes.
Further, analysis lithium boundary window method when lithium ion battery charges is obtained using three-electrode battery are as follows: utilize
The above-mentioned three-electrode battery prepared obtains analysis lithium when battery to be charged is charged under different temperatures, different charging currents
Initial state, i.e. analysis lithium voltage boundary window；
Further, judge that analysing condition used in lithium boundary is: during the charging process, the cathode and reference electrode of lithium ion battery
The as boundary condition of cathode analysis lithium when surveyed current potential is reduced to 0；As shown in Fig. 3 and table 1, for 25 DEG C, when battery is with 3.0C
When electric current charges to 4.088V, analysis lithium takes place in cathode；When charging to 4.153V with 2.5C electric current, analysis takes place in cathode
Lithium；When charging to 4.213V with 2.0C electric current, analysis lithium takes place in cathode；When charging to 4.287V with 1.5C electric current, bear
Analysis lithium takes place in pole, and when with the charging of 0.7C electric current, cathode whole process does not occur to analyse lithium；
Table 1
Further, a quick ladder charging strategy is designed according to the analysis lithium boundary window and charged
Battery core to be charged is charged with electric current I1, before voltage reaches analysis lithium boundary voltage corresponding to I1, switching is filled
Electric current continues to charge to I2, and before voltage reaches analysis lithium boundary voltage corresponding to electric current I2, switching electric current to I3 continues
Charging, before voltage reaches analysis lithium boundary voltage corresponding to electric current I3, then switching electric current arrives In, up to reaching 100%
SOC state, i.e., it is fully charged.
Further, I1 > I2 > I3 > ... the > In；
Below for 25 DEG C illustrate according to analysis lithium boundary window formulate fast battery charge strategy: first to battery core to be charged with
3.0C electric current charges, and before voltage reaches analysis lithium boundary voltage (4.088V) corresponding to 3.0C, switches charging current
Continue to charge to 2.5C, before voltage reaches analysis lithium boundary voltage (4.153V) corresponding to 2.5C, switching charging current is extremely
2.0C continues to charge, and before voltage reaches analysis lithium boundary voltage (4.213V) corresponding to 2.0C, switching charging current is extremely
1.5C continues to charge, and before voltage reaches analysis lithium boundary voltage (4.287V) corresponding to 1.5C, switching charging current is extremely
0.7C continues to charge, until completing charging, that is, reaches 100%SOC state；Battery is constantly in charging in entire charging process
Analysis lithium boundary window is hereinafter, control always within charging best curve, therefore do not occur to analyse lithium, and can be rapidly filled with electricity.
(as shown in Figure 4)
Above-described embodiment is only a preferred embodiment in this method, and many within the scope of spirit of that invention equivalent replace
It changes or deforms, be all contained in present claims.
Claims (5)
1. a kind of lithium ion battery fast charge method, which is characterized in that its key step includes:
S1, three-electrode battery is prepared using three-level battery process；
S2, using three-electrode battery obtain lithium ion battery charge when analysis lithium boundary window；
S3, a quick ladder charging strategy is designed according to the analysis lithium boundary window；
S4, it is charged using above-mentioned quick ladder charging strategy to lithium ion battery.
2. a kind of lithium ion battery fast charge method as described in claim 1, which is characterized in that obtained using three-electrode battery
Analysis lithium initial state when battery to be charged being taken to be charged under different temperatures, different charging currents, i.e. analysis lithium voltage boundary
Window.
3. a kind of lithium ion battery fast charge method as claimed in claim 2, which is characterized in that used in judgement analysis lithium boundary
Condition be: during the charging process, as cathode analyses lithium when the cathode of lithium ion battery and the surveyed current potential of reference electrode are reduced to 0
Boundary condition.
4. a kind of lithium ion battery fast charge method as described in claim 1, which is characterized in that the quick ladder charging
Battery core to be charged is is charged by strategy with electric current I1, before voltage reaches analysis lithium boundary voltage corresponding to I1, switching
Charging current continues to charge to I2, before voltage reaches analysis lithium boundary voltage corresponding to electric current I2, switching electric current to I3 after
Continuous charging, before voltage reaches analysis lithium boundary voltage corresponding to electric current I3, then switching electric current arrives In, up to reaching 100%
SOC state, i.e., it is fully charged.
5. a kind of lithium ion battery fast charge method as claimed in claim 4, which is characterized in that the I1 > I2 > I3
> ... > In.
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556608A (en) * | 2019-08-29 | 2019-12-10 | 清华大学 | Battery pulse heating parameter determination method and parameter determination system |
| CN110611133A (en) * | 2019-09-20 | 2019-12-24 | 河南锂动电源有限公司 | Charging method of lithium ion battery management system |
| CN110793668A (en) * | 2019-10-30 | 2020-02-14 | 云南恒协科技有限公司 | Resonance magnetic coupling induction electricity-taking self-powered wireless temperature measurement system |
| CN111082173A (en) * | 2019-12-06 | 2020-04-28 | 中国第一汽车股份有限公司 | Lithium ion battery rapid charging method based on lithium separation prevention |
| CN111443296A (en) * | 2020-03-17 | 2020-07-24 | 合肥国轩高科动力能源有限公司 | Method for verifying feedback charging capability of lithium ion battery |
| CN111613846A (en) * | 2020-07-10 | 2020-09-01 | 深圳传音控股股份有限公司 | Battery charging method, handheld terminal and readable storage medium |
| CN111710929A (en) * | 2020-06-30 | 2020-09-25 | 中航锂电技术研究院有限公司 | Lithium battery charging method |
| CN112038719A (en) * | 2020-07-28 | 2020-12-04 | 天津力神电池股份有限公司 | Method for making quick charging strategy of lithium ion battery |
| CN112366375A (en) * | 2020-09-03 | 2021-02-12 | 万向一二三股份公司 | Quick charging method for lithium ion power battery |
| WO2021035736A1 (en) * | 2019-08-30 | 2021-03-04 | Oppo广东移动通信有限公司 | Charging control method and apparatus, charging test method and system, and electronic device |
| CN112448050A (en) * | 2019-08-28 | 2021-03-05 | 北京小米移动软件有限公司 | Charging method and charging device for lithium ion battery |
| CN112713323A (en) * | 2020-12-10 | 2021-04-27 | 欣旺达电动汽车电池有限公司 | Lithium ion battery rapid charging method and lithium ion battery |
| CN112820963A (en) * | 2021-01-08 | 2021-05-18 | 清华大学 | Low-temperature charging method for lithium ion battery |
| CN113125974A (en) * | 2021-04-22 | 2021-07-16 | 远景动力技术(江苏)有限公司 | Method and device for detecting lithium separation of battery |
| CN113782852A (en) * | 2021-08-27 | 2021-12-10 | 蜂巢能源科技有限公司 | Lithium ion battery and charging and discharging method thereof |
| CN113972411A (en) * | 2021-09-28 | 2022-01-25 | 天津力神电池股份有限公司 | Method for determining lithium battery quick-charging strategy |
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| CN114268149A (en) * | 2021-12-17 | 2022-04-01 | 上海瑞浦青创新能源有限公司 | Battery quick-charging control method and system and battery quick-charging method |
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| CN112820963A (en) * | 2021-01-08 | 2021-05-18 | 清华大学 | Low-temperature charging method for lithium ion battery |
| CN113125974A (en) * | 2021-04-22 | 2021-07-16 | 远景动力技术(江苏)有限公司 | Method and device for detecting lithium separation of battery |
| CN113782852A (en) * | 2021-08-27 | 2021-12-10 | 蜂巢能源科技有限公司 | Lithium ion battery and charging and discharging method thereof |
| CN113972411B (en) * | 2021-09-28 | 2023-04-07 | 天津力神电池股份有限公司 | Method for determining lithium battery quick-charging strategy |
| CN113972411A (en) * | 2021-09-28 | 2022-01-25 | 天津力神电池股份有限公司 | Method for determining lithium battery quick-charging strategy |
| WO2023070316A1 (en) * | 2021-10-26 | 2023-05-04 | 东莞新能安科技有限公司 | Electrochemical apparatus management method, system, electronic device, and charging apparatus |
| WO2023092414A1 (en) * | 2021-11-25 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Power battery charging method and battery management system |
| CN114268149A (en) * | 2021-12-17 | 2022-04-01 | 上海瑞浦青创新能源有限公司 | Battery quick-charging control method and system and battery quick-charging method |
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