CN112366374A - Charging and discharging method for lithium ion power battery - Google Patents
Charging and discharging method for lithium ion power battery Download PDFInfo
- Publication number
- CN112366374A CN112366374A CN201911214413.9A CN201911214413A CN112366374A CN 112366374 A CN112366374 A CN 112366374A CN 201911214413 A CN201911214413 A CN 201911214413A CN 112366374 A CN112366374 A CN 112366374A
- Authority
- CN
- China
- Prior art keywords
- charging
- battery
- discharging
- voltage
- limiting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
-
- 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
- H01M10/448—End of discharge regulating measures
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- 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
Abstract
The invention discloses a charging and discharging method of a lithium ion power battery, which overcomes the problem of short service life of the battery in the prior art and comprises a first charging and discharging method and a second charging and discharging method, wherein the first charging and discharging method is used for limiting the charging electric quantity of a lithium iron phosphate battery system, and the second charging and discharging method is used for limiting the charging electric quantity and the discharging electric quantity of a ternary and high-voltage ternary battery system. The invention strictly limits the charge-discharge voltage interval of the battery, controls the charge-discharge voltage, prevents charge-discharge under the condition of a low SOC interval, reduces the severe internal stress of the battery, reduces the overcharge of the ternary battery during charge-discharge under the condition of a high SOC interval, and can prolong the service life of the lithium ion battery.
Description
Technical Field
The invention relates to the technical field of lithium ion battery application, in particular to a charging and discharging method of a lithium ion power battery, which can prolong the service life of the lithium ion battery.
Background
The use period of the lithium ion power and energy storage battery determines the cost performance of the lithium ion power and energy storage battery, and along with increasingly strict pursuit of people on energy saving and emission reduction values of the power battery, the power battery suitable for long service life period starts from the aspects of battery materials, battery cell consistency control and the like, and the control of the charging and discharging state of the battery in the use process is very important. The prior art does not limit the charging and discharging range and the operation interval voltage of the battery, so that the service life of the battery is short.
For example, a method, a device and a system for multi-stage temperature-controlled discharge of a battery disclosed in the Chinese patent document, which is disclosed in the publication No. CN110190349A, includes the steps of acquiring the temperature of the battery in the discharge process in real time; and switching the discharging mode of the battery according to the temperature until the discharging process is finished. The method does not limit the charging and discharging range and the voltage of the operation interval of the battery, the internal stress of the battery is severe in the charging and discharging process, and overcharging can occur, so that the service life of the battery is short.
Disclosure of Invention
The invention provides a charging and discharging method of a lithium ion power battery, aiming at overcoming the problem of short service life of the battery in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lithium ion power battery charging and discharging method comprises a lithium iron phosphate battery system and a ternary and high-voltage ternary battery system and comprises a first charging and discharging method and a second charging and discharging method, wherein the first charging and discharging method is used for limiting charging electric quantity of the lithium iron phosphate battery system, and the second charging and discharging method is used for limiting charging electric quantity and limiting discharging electric quantity of the ternary and high-voltage ternary battery system.
Preferably, the first charge and discharge method includes limiting a cut-off voltage to 2.5V to 3.1V by a discharge capacity, and discharging a current to 80% to 95% of a full charge state. The lithium iron phosphate battery system adopts a method without limiting the charging capacity until the battery is charged to the specified upper limit voltage of 3.65V, the current reaches the cut-off current, the discharging capacity is controlled to require the battery to be discharged to the specified 2.0V of the system, the optimal lower limit cut-off voltage is optimally controlled to be between 2.5V and 3.1V, and the battery is discharged to 80 percent to 95 percent of the full charge state.
Preferably, the second charge and discharge method includes limiting the charge cut-off voltage to 4.1V to 4.7V, and charging the electric quantity to 80% to 95% of the full charge electric quantity. Charging to the upper limit voltage of 4.2V and above of the specified system, controlling the charging capacity to 80-95% of the full charge capacity of the battery, and the charge cut-off voltage is lower than the specified upper limit voltage.
Preferably, the second charge and discharge method includes limiting a discharge cutoff voltage to 3.0V to 3.4V, and discharging the electric charge to 80% to 95% of the electric charge of the battery.
Preferably, the first charge-discharge method includes limiting the charge current to 0.1C to 50C.
Preferably, the first charge and discharge method includes limiting the discharge current to 0.1C to 100C.
Preferably, the second charge and discharge method includes limiting the charge current to 0.1C to 10C.
Preferably, the second charge and discharge method includes limiting the discharge current to 0.1C to 30C.
Preferably, the voltage for the lithium iron phosphate battery system is 2.0V-3.65V, and the voltage for the ternary and high-voltage ternary battery system is 2.7V-4.2V and is more than 4.2V. Aiming at the lithium iron phosphate battery system with the use voltage of 2.0V-3.65V, a method for controlling the discharge electric quantity without limiting the charge electric quantity is adopted; aiming at ternary and high-voltage ternary battery systems with the use voltage of 2.7V-4.2V and above, a charging mode under the state of charge electric quantity is controlled, and the discharge electric quantity is limited.
Preferably, the method also comprises the steps of applying the remaining 5% -20% of electricity to emergency self-heating, increasing the temperature of the battery, and setting the self-heating discharge voltage as a cut-off voltage. When the battery operates under the condition of extreme low-temperature environment, the battery needs to be charged, the battery uses the residual 5-20% of electric quantity for self-heating, and the charging temperature of the battery is kept to be higher than 0 ℃.
Therefore, the invention has the following beneficial effects:
1. the method strictly limits a charge-discharge voltage interval, controls the charge-discharge voltage and prevents charge-discharge under the condition of a low SOC interval;
2. the internal stress of the battery is reduced, and the overcharge of the ternary battery during charging and discharging under the condition of a high SOC interval is reduced;
3. the battery can be self-heated at low temperature, and the charging temperature of the battery is kept to be more than 0 ℃.
Detailed Description
The following examples and comparative examples are given to further illustrate the embodiments of the present invention.
Example (b):
mode 1: the method for limiting the charging electric quantity is adopted for the lithium iron phosphate system 8AH battery, 8A is charged to 3.65V at constant current and constant voltage, 80A is discharged to 2.5V, and the full charge-discharge capacity is tested for 1 time every 1000 times.
Mode 2: the method for limiting the charging electric quantity is adopted for the lithium iron phosphate system 8AH battery, 8A is charged to 3.65V at constant current and constant voltage, 80A is discharged to 3.0V, and the full charge-discharge capacity is tested for 1 time every 1000 times.
Mode 3: the method for limiting the charging electric quantity is adopted for the lithium iron phosphate system 8AH battery, 8A is charged to 3.65V at constant current and constant voltage, 80A is discharged to 3.1V, and the full charge-discharge capacity is tested for 1 time every 1000 times.
Mode 4: and (3) adopting a method for limiting charging electric quantity and discharging electric quantity for the ternary system 26AH battery, charging the 26A to 4.15V at constant current and constant voltage, discharging the 50A to the lower limit of 3.0V, and testing the full charge-discharge capacity 1 time every 500 times.
Mode 5: and (3) adopting a method for limiting charging electric quantity and discharging electric quantity for the ternary system 26AH battery, charging the 26A to 4.15V at constant current and constant voltage, discharging the 50A to the lower limit of 3.2V, and testing the full charge-discharge capacity 1 time every 500 times.
Comparative example 1: and charging the 8AH battery 8A of the lithium iron phosphate system to 100% of the actually measured capacity at constant current and constant voltage, discharging 80A to 2V, and testing the full charge-discharge capacity for 1 time every 1000 times.
Comparative example 2: and (3) charging the 8AH battery 8A of the lithium iron phosphate system to 80% of the actually measured capacity at a constant current, discharging the 80A to 2.0V, and testing the full charge-discharge capacity for 1 time every 1000 times.
Comparative example 3: and (3) charging the lithium iron phosphate system 8AH battery 8A to 50% of the actually measured capacity at a constant current, discharging the lithium iron phosphate system 8A to 2V at 21A, and testing the full charge-discharge capacity 1 time every 1000 times.
Comparative example 4: the ternary system 26AH battery 26A was charged to 4.2V at constant current and constant voltage, and 50A was discharged to 2.7V, with full charge-discharge capacity tested 1 time per 500 times.
The first capacity retention rate, 1000 capacity retention rates, 2000 capacity retention rates, 3000 capacity retention rates and 4000 capacity retention rates were recorded, respectively.
The first capacity retention rate, the 1000 capacity retention rate, the 2000 capacity retention rate, the 3000 capacity retention rate and the 4000 capacity retention rate of the above examples and comparative examples are counted, and the specific experimental data results are shown in table 1 and table 2:
| examples of the experiments | First capacity retention rate | Capacity retention rate 1000 times | Capacity retention rate of 2000 times | Capacity retention ratio of 3000 times | Capacity retention ratio of 4000 times |
| Mode 1 | 100% | 100.2% | 99.0% | 97.3% | 96.2% |
| Mode 2 | 100% | 100.7% | 99.4% | 98.1% | 96.7% |
| Mode 3 | 100% | 102.1% | 99.1% | 98.3% | 97.3% |
| Comparative example 1 | 100% | 93.1% | 88.5% | 81.7% | 74.5% |
| Comparative example 2 | 100% | 94.5% | 88.9% | 84.8% | 80.2% |
| Comparative example 3 | 100% | 93.1% | 88.3% | 84.0% | 79.5% |
Table 1
| Examples of the experiments | First capacity retention rate | Capacity retention rate 500 times | Capacity retention rate 1000 times | Capacity retention ratio 1500 times | Capacity retention rate of 2000 times |
| Mode 4 | 100% | 97.1% | 94.8% | 93.1% | 91.0% |
| Mode 5 | 100% | 97.6% | 95.2% | 93.6% | 91.8% |
| Comparative example 4 | 100% | 95.7% | 92.2% | 89.0% | 81.2% |
Table 2
From the data, it can be seen that the lithium iron phosphate-graphite system battery can effectively prolong the cycle life of the battery by adopting a method of controlling the discharge capacity by limiting the discharge cut-off voltage without limiting the charge capacity. The ternary-graphite system battery adopts a method of limiting the charging electric quantity and limiting the discharging voltage to control the discharging capacity by charging the battery at a constant current to a cut-off voltage, so that the cycle life of the battery can be effectively prolonged.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so that equivalent changes or modifications made by the features and principles of the present invention as described in the claims should be included in the scope of the present invention.
Claims (10)
1. A charging and discharging method for a lithium ion power battery comprises a lithium iron phosphate battery system and a ternary and high-voltage ternary battery system and is characterized by comprising a first charging and discharging method and a second charging and discharging method, wherein the first charging and discharging method is used for limiting charging electric quantity of the lithium iron phosphate battery system, and the second charging and discharging method is used for limiting charging electric quantity and limiting discharging electric quantity of the ternary and high-voltage ternary battery system.
2. The method of claim 1, wherein the first method comprises limiting the cut-off voltage to 2.5V-3.1V and discharging the current to 80% to 95% of the full charge state.
3. The method of claim 1, wherein the second method of charging and discharging comprises limiting the cut-off voltage to 4.1V-4.7V, which is between 80% and 95% of the full charge capacity.
4. The method as claimed in claim 1, wherein the second method comprises limiting the discharge cut-off voltage to 3.0V-3.4V, and discharging the battery to 80% to 95% of the battery capacity.
5. The method of claim 2, wherein the first charging and discharging method comprises limiting the charging current to 0.1C-50C.
6. The method of claim 2, wherein the first charging and discharging method comprises limiting the discharge current to 0.1C-100C.
7. The method as claimed in claim 3 or 4, wherein the second method comprises limiting the charging current to 0.1-10C.
8. The method as claimed in claim 3 or 4, wherein the second method comprises limiting the discharge current to 0.1-30C.
9. The method as claimed in claim 1, wherein the voltage for the lithium iron phosphate battery system is 2.0V-3.65V, and the voltage for the ternary and high voltage ternary battery system is 2.7V-4.2V and greater than 4.2V.
10. The lithium ion power battery charging and discharging method according to claim 1, further comprising applying emergency self-heating to the remaining 5% -20% of electricity to raise the battery temperature, wherein the self-heating discharge voltage is a cut-off voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911214413.9A CN112366374B (en) | 2019-12-02 | 2019-12-02 | Charging and discharging method of lithium ion power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911214413.9A CN112366374B (en) | 2019-12-02 | 2019-12-02 | Charging and discharging method of lithium ion power battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112366374A true CN112366374A (en) | 2021-02-12 |
| CN112366374B CN112366374B (en) | 2023-04-28 |
Family
ID=74516471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911214413.9A Active CN112366374B (en) | 2019-12-02 | 2019-12-02 | Charging and discharging method of lithium ion power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112366374B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517483A (en) * | 2021-07-15 | 2021-10-19 | 深圳市清新电源研究院 | Method for prolonging service life of lithium ion battery on product |
| CN115622199A (en) * | 2022-12-02 | 2023-01-17 | 中创新航科技股份有限公司 | Charging method and device of battery system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154751A (en) * | 2006-09-30 | 2008-04-02 | 万向电动汽车有限公司 | Lithium ion battery and method for effectively restraining capacitance loss of Lithium manganite anode material |
| CN103094635A (en) * | 2011-10-27 | 2013-05-08 | 广州鹏辉能源科技股份有限公司 | Method for improving stability of lithium iron phosphate battery |
| CN103904378A (en) * | 2014-04-10 | 2014-07-02 | 哈尔滨威星动力电源科技开发有限责任公司 | Charge-discharge method of lithium battery module |
| CN104810565A (en) * | 2014-06-13 | 2015-07-29 | 万向A一二三系统有限公司 | Lithium ion battery charging and discharging method |
| CN106229572A (en) * | 2016-08-25 | 2016-12-14 | 合肥国轩高科动力能源有限公司 | A kind of chemical synthesizing method suppressing nickelic ternary battery high-temperature circulation aerogenesis |
| CN107394294A (en) * | 2017-07-20 | 2017-11-24 | 浙江谷神能源科技股份有限公司 | System, control device for lithium ion battery discharge and recharge and associated method |
| CN107808987A (en) * | 2016-09-08 | 2018-03-16 | 宁德新能源科技有限公司 | Secondary battery charging method |
| CN107946672A (en) * | 2017-12-01 | 2018-04-20 | 深圳市森树强电子科技有限公司 | A kind of linear lithium battery charging management method and device |
-
2019
- 2019-12-02 CN CN201911214413.9A patent/CN112366374B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154751A (en) * | 2006-09-30 | 2008-04-02 | 万向电动汽车有限公司 | Lithium ion battery and method for effectively restraining capacitance loss of Lithium manganite anode material |
| CN103094635A (en) * | 2011-10-27 | 2013-05-08 | 广州鹏辉能源科技股份有限公司 | Method for improving stability of lithium iron phosphate battery |
| CN103904378A (en) * | 2014-04-10 | 2014-07-02 | 哈尔滨威星动力电源科技开发有限责任公司 | Charge-discharge method of lithium battery module |
| CN104810565A (en) * | 2014-06-13 | 2015-07-29 | 万向A一二三系统有限公司 | Lithium ion battery charging and discharging method |
| CN106229572A (en) * | 2016-08-25 | 2016-12-14 | 合肥国轩高科动力能源有限公司 | A kind of chemical synthesizing method suppressing nickelic ternary battery high-temperature circulation aerogenesis |
| CN107808987A (en) * | 2016-09-08 | 2018-03-16 | 宁德新能源科技有限公司 | Secondary battery charging method |
| CN107394294A (en) * | 2017-07-20 | 2017-11-24 | 浙江谷神能源科技股份有限公司 | System, control device for lithium ion battery discharge and recharge and associated method |
| CN107946672A (en) * | 2017-12-01 | 2018-04-20 | 深圳市森树强电子科技有限公司 | A kind of linear lithium battery charging management method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517483A (en) * | 2021-07-15 | 2021-10-19 | 深圳市清新电源研究院 | Method for prolonging service life of lithium ion battery on product |
| CN115622199A (en) * | 2022-12-02 | 2023-01-17 | 中创新航科技股份有限公司 | Charging method and device of battery system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112366374B (en) | 2023-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102208685B (en) | Processing method for formation of lithium ion batteries | |
| CN108583347B (en) | Equalization circuit for parallel charging and selective single battery discharging equalization and control method thereof | |
| KR101494156B1 (en) | Charging Method of Secondary Battery | |
| CN107808987A (en) | Secondary battery charging method | |
| CN112366374B (en) | Charging and discharging method of lithium ion power battery | |
| CN102891340A (en) | Step charging method | |
| CN104638311A (en) | Formation method of aqueous iron-lithium battery | |
| CN111987378A (en) | Charging and discharging method for improving OCV consistency of lithium ion battery | |
| WO2011056537A2 (en) | Energy storage device with limited lignin in negative electrode | |
| CN111092271B (en) | Low-temperature charging method for lithium ion battery | |
| CN110970670B (en) | Power battery management method and device and computer readable storage medium | |
| CN109786875B (en) | Formation method for prolonging storage time of lithium ion battery | |
| CN112820964B (en) | Aging and capacity grading method for lithium ion battery | |
| CN112946502B (en) | Method for rapidly testing cycle life of lithium ion battery | |
| CN112946500B (en) | Method for rapidly testing cycle life of lithium ion battery | |
| CN114744301A (en) | Active lithium excitation method of lithium battery with supplemented lithium pole piece and application | |
| CN104124723A (en) | Circuit for preventing cell from overcharging/overdischarging | |
| CN108987831B (en) | Activation method for lead-acid storage battery with insufficient capacity | |
| CN111313116B (en) | Rapid charging method of lead-acid storage battery | |
| CN112666482A (en) | Method and system for testing cycle life of lithium ion battery | |
| CN110676514A (en) | Lithium ion battery monomer and formation method thereof | |
| CN114188596B (en) | Pre-activation method of lithium ion battery | |
| CN112946505B (en) | Method for rapidly testing cycle life of lithium ion battery | |
| CN219436669U (en) | Equal charging circuit of elevator power supply storage battery | |
| CN216016483U (en) | Improved generation lithium iron phosphate battery charging line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211110 Address after: 311215 No. 855, Jianshe Second Road, economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant after: Wanxiang A123 Co.,Ltd. Address before: 311215 No. 855, Jianshe Second Road, Xiaoshan Economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Applicant before: Wanxiang A123 Co.,Ltd. Applicant before: WANXIANG GROUP Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |