CN111261963A - Energy type lithium iron phosphate battery testing method - Google Patents
Energy type lithium iron phosphate battery testing method Download PDFInfo
- Publication number
- CN111261963A CN111261963A CN201811466129.6A CN201811466129A CN111261963A CN 111261963 A CN111261963 A CN 111261963A CN 201811466129 A CN201811466129 A CN 201811466129A CN 111261963 A CN111261963 A CN 111261963A
- Authority
- CN
- China
- Prior art keywords
- battery
- charging
- discharging
- constant
- current
- 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.)
- Pending
Links
Images
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
-
- 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
Landscapes
- Secondary Cells (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The invention provides a testing method of an energy type lithium iron phosphate battery, which comprises the following steps: charging, namely charging the battery at constant current and then at constant voltage; and a discharging step, discharging the battery at constant power. According to the operation condition of the battery, the invention systematically considers the adjustment of the internal voltage and current of the battery, balances and eliminates the occurrence of the polarization phenomenon in the battery by carrying out constant current charging, constant voltage charging and constant power discharging on the battery in an optimal battery charging and discharging mode, balances the high temperature problem brought by the battery in the charging and discharging process, adjusts the charging and discharging current and voltage of the battery according to the actual operation condition, and the whole charging and discharging process is mutually matched, so that the heat dissipation process of the battery can be shortened as much as possible under the condition of ensuring the optimal operation condition of the battery, and the rapid charging and discharging process of the battery is realized, thereby ensuring the higher capacity retention rate and long service life cycle of the existing battery system in the actual application scene.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a testing method of an energy type lithium iron phosphate battery.
Background
With the continuous development of human society, the consumption of non-renewable energy sources is gradually increased, and meanwhile, the problems of environmental deterioration and the like caused by energy consumption need to be solved urgently, so that the development of green, environment-friendly, clean and efficient renewable energy sources becomes the inevitable trend of the development of the future energy society, and the renewable energy sources such as wind energy, solar energy, tidal energy and the like have great advantages in the aspects. In recent years, the country encourages and promotes the utilization of novel green renewable energy sources, gives full play to the advantages of energy sources such as solar energy, wind energy and the like, puts forward relevant policies for developing comprehensive energy services, develops distributed energy sources, and builds a large number of distributed energy resource loaders to be incorporated into the national power grid. However, with the continuous increase of the installed capacity of new energy, part of clean energy power grids cannot be consumed, and a large amount of wind and light abandoning phenomena can be caused. The introduction of the energy storage device can effectively improve the occurrence of the phenomenon, and the introduction of the energy storage device can effectively improve the operation quality of the power grid.
In the existing commercial battery system, the lithium iron phosphate battery has the advantages of long cycle life, high battery safety and the like, so that the lithium iron phosphate battery becomes an energy storage system with the highest application value in the energy storage technology, and the reasonable operation of the battery management system plays a great role in the operation condition and the performance of the battery. The operation and maintenance test of the existing battery management system is mostly carried out by adopting a single procedure, the stable operation of the battery in the charging and discharging process can not be ensured, and finally, the cycle life of the battery under the normal-temperature working condition state is far shorter than the expected life. Therefore, the reasonable operation of the lithium iron phosphate battery management system also becomes an important guarantee for the development and application of the future energy storage technology.
Disclosure of Invention
In view of this, the invention provides a testing method for an energy type lithium iron phosphate battery, and aims to solve the problem that the operation and maintenance test of the current battery management system can cause short cycle life of the battery.
The invention provides a method for testing an energy type lithium iron phosphate battery, which comprises the following steps: charging, namely charging the battery at constant current and then at constant voltage; and a discharging step, discharging the battery at constant power.
Further, in the above method for testing an energy-type lithium iron phosphate battery, in the charging step, the constant-current charging of the battery includes: carrying out first-rate constant current charging on the battery; and when the SOC value of the battery reaches a first preset value, performing voltage balancing operation on the battery.
Further, in the testing method of the energy type lithium iron phosphate battery, the charging current of the first-rate constant-current charging is 0.4-0.8C.
Further, in the testing method of the energy type lithium iron phosphate battery, the first preset value is 70% -90%.
Further, in the above method for testing an energy-type lithium iron phosphate battery, in the charging step, the constant voltage charging of the battery includes: performing second-rate constant-current charging on the battery; and when the SOC value of the battery reaches a first preset value, charging the battery at a constant voltage until the battery is fully charged.
Further, in the method for testing the energy type lithium iron phosphate battery, the charging current of the second-rate constant-current charging is 0.05-0.25C.
Further, in the method for testing the energy type lithium iron phosphate battery, when the battery is charged at constant voltage until the battery is fully charged, the SOC value of the battery reaches the maximum value.
Further, in the energy type lithium iron phosphate battery testing method, in the discharging step, the discharging the battery at constant power includes: discharging the battery at constant power; and stopping discharging and standing when the SOC value of the battery reaches a second preset value.
Further, in the testing method of the energy type lithium iron phosphate battery, the second preset value is 0% -10%.
Further, in the method for testing an energy type lithium iron phosphate battery, after the discharging step, the method further includes: and a circulation step of circularly performing the charging step and the discharging step on the battery.
According to the operation condition of the battery, the internal voltage and current of the battery are systematically considered, the battery is charged at constant current, then charged at constant voltage and then discharged at constant power, the polarization phenomenon inside the battery is balanced and eliminated in an optimal battery charging and discharging mode, the high-temperature problem brought by the battery in the charging and discharging process is balanced, the charging and discharging current and the voltage of the battery are adjusted according to the actual operation condition, the whole charging and discharging process is matched with each other, the heat dissipation process of the battery can be shortened as much as possible under the condition of ensuring the optimal operation condition of the battery, the rapid charging and discharging process of the battery is realized, and therefore the higher capacity retention rate and the long service life cycle of the existing battery system in the actual application scene are ensured.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a method for testing an energy-type lithium iron phosphate battery according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a charging step in a testing method of an energy-type lithium iron phosphate battery according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a discharging step in a testing method of an energy-type lithium iron phosphate battery according to an embodiment of the present invention;
fig. 4 is another flowchart of a testing method of an energy-type lithium iron phosphate battery according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, fig. 1 is a flowchart of a testing method for an energy-type lithium iron phosphate battery provided in this embodiment. As shown, the method comprises the following steps:
in the charging step S110, the battery is charged at a constant current and then at a constant voltage.
Specifically, under normal temperature conditions, referring to fig. 2, in step S111, the battery is first subjected to first-rate constant current charging, where the charging current is adjusted to be in a range of 0.4C-0.8C, that is, the battery is subjected to high-rate constant current charging operation, and at this time, the battery can be rapidly charged.
Step S112, after the SOC value of the battery reaches a first preset value, for example, after the SOC value reaches 70% -90%, or after the cell voltage of the battery reaches a first preset voltage, for example, 3.6V-3.65V, the charging process of the battery is stopped, the rapid charging of the battery can cause serious polarization phenomenon inside the battery pack, so that the voltage distribution of the cell is not uniform, therefore, after the rapid charging of the battery is completed, the voltage equalization operation of the battery is required to be performed for 3min-20min, at this time, the voltage of the cell is reduced, the voltage of the battery gradually tends to be uniform, the uniformity of the electrochemical reaction process inside the cell is ensured, the damage to the battery caused by the polarization phenomenon generated by the nonuniform reaction inside the cell is eliminated, and the stable operation of the battery charging process is ensured.
And step S113, continuing to charge the battery by adopting a second-magnification constant current, wherein the charging current regulation range is 0.05C-0.25C, namely, carrying out low-current charging on the battery, and the process can effectively reduce the occurrence of the polarization phenomenon generated by ion transmission in the battery by using a low-current charging mode, thereby ensuring the stable operation of the battery charging process.
Step S114, in the second power constant current charging state, after the SOC value of the battery reaches the first preset value again, for example, after the SOC value of the battery reaches 70% -90% again, or after the cell voltage of the battery reaches 3.6V-3.65V again, the constant current charging process of the battery is stopped, and then the battery is charged in a constant voltage state, so that the voltage of the whole battery is ensured to be unchanged, and the occurrence of the polarization phenomenon caused by the internal charging of the battery is further reduced. At this time, as the battery reaction proceeds, the current of the battery internal reaction becomes gradually smaller. When the battery is fully charged, namely when the maximum voltage of the single battery in the battery reaches 3.7V or the discharge current density of the battery is less than 2A, the charging process of the battery is stopped, the SOC value of the battery reaches the maximum value, namely 100%, then the battery is kept still to reduce the polarization condition of the battery, realize the voltage equalization and temperature control in the battery, and the time is regulated and controlled between 20min and 40 min.
And a discharging step S120, discharging the battery at constant power.
Specifically, referring to fig. 3, in step S121, after the charging process of the battery is completed, the battery is discharged in a constant power manner, and the discharging process of the battery is regulated and controlled between 1 hour and 2 hours.
In step S122, after the SOC value of the battery reaches a second preset value, for example, 0% to 10%, the battery may also stop discharging when the minimum cell voltage of the battery is reduced to a second preset voltage, for example, 2.58V to 2.62V. And after the battery is discharged, carrying out standing operation, and regulating and controlling the time between 20min and 40 min.
In the embodiment, according to the operation condition of the battery, the adjustment of the internal voltage and current of the battery is systematically considered, the high-temperature problem caused in the charging and discharging process of the battery is balanced by carrying out constant-current charging, constant-voltage charging and constant-power discharging on the battery in an optimal battery charging and discharging mode, and the charging and discharging current and voltage of the battery are adjusted according to the actual operation condition, so that the whole charging and discharging process is matched with each other, the heat dissipation process of the battery can be shortened as much as possible under the condition of ensuring the optimal operation condition of the battery, the rapid charging and discharging process of the battery is realized, and the higher capacity retention rate and the long-life cycle of the existing battery system in the actual application scene are ensured.
Referring to fig. 4, fig. 4 is a flowchart of a method for testing an energy-type lithium iron phosphate battery provided in this embodiment. As shown, the method comprises the following steps:
in the charging step S110, the battery is charged at a constant current and then at a constant voltage.
And a discharging step S120, discharging the battery at constant power.
And a circulation step S130 for circulating the battery to perform the charging step S110 and the discharging step S120.
Specifically, the charging step S110 and the discharging step S120 of the battery are a cycle, and the charging step S110 and the discharging step S120 are repeated for the battery for a plurality of cycles.
The results of the charge and discharge tests performed on the battery by the conventional method and the method provided in this example are shown in table 1.
TABLE 1
In this embodiment, the long-life cycle of the battery capacity can be ensured to the greatest extent by cycling the charging process and the discharging process of the battery.
In summary, in the present embodiment, according to the operation condition of the battery, the adjustment of the voltage and the current inside the battery is systematically considered, the high temperature problem caused in the charging and discharging process of the battery is balanced by performing constant current charging, constant voltage charging, and constant power discharging on the battery in an optimal charging and discharging manner of the battery, and the whole charging and discharging process is matched with each other, so that the heat dissipation process of the battery can be shortened as much as possible under the condition of ensuring the optimal operation condition of the battery, and the rapid charging and discharging process of the battery is realized, thereby ensuring the higher capacity retention rate and the long life cycle of the existing battery system in the actual application scenario.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A testing method for an energy type lithium iron phosphate battery is characterized by comprising the following steps:
charging, namely charging the battery at constant current and then at constant voltage;
and a discharging step, wherein the battery is discharged at constant power.
2. The method for testing the energy type lithium iron phosphate battery according to claim 1, wherein in the charging step, the constant-current charging of the battery comprises:
carrying out first-rate constant current charging on the battery;
and when the SOC value of the battery reaches a first preset value, performing voltage balancing operation on the battery.
3. The method for testing a lithium-iron-phosphate energy battery of claim 2,
and the charging current of the first-rate constant-current charging is 0.4-0.8C.
4. The method for testing a lithium-iron-phosphate energy battery of claim 2,
the first preset value is 70% -90%.
5. The method for testing an energy type lithium iron phosphate battery according to claim 2, wherein the charging step of constant voltage charging the battery comprises:
performing second-rate constant-current charging on the battery;
and when the SOC value of the battery reaches the first preset value, the battery is charged at a constant voltage until the battery is fully charged.
6. The method for testing a lithium-iron-phosphate energy battery of claim 5,
and the charging current of the second-rate constant-current charging is 0.05-0.25C.
7. The method for testing a lithium-iron-phosphate energy battery of claim 5,
and when the battery is charged at constant voltage until the battery is fully charged, the SOC value of the battery reaches the maximum value.
8. The method for testing the energy type lithium iron phosphate battery according to claim 1, wherein the step of discharging the battery at a constant power comprises the steps of:
discharging the battery at constant power;
and stopping discharging and standing when the SOC value of the battery reaches a second preset value.
9. The method for testing a lithium-iron-phosphate energy battery of claim 8,
the second preset value is 0% -10%.
10. The method for testing a lithium-iron-phosphate energy battery of claim 1, further comprising, after the discharging step:
and a circulation step of circulating the battery through the charging step and the discharging step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811466129.6A CN111261963A (en) | 2018-12-03 | 2018-12-03 | Energy type lithium iron phosphate battery testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811466129.6A CN111261963A (en) | 2018-12-03 | 2018-12-03 | Energy type lithium iron phosphate battery testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111261963A true CN111261963A (en) | 2020-06-09 |
Family
ID=70946942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811466129.6A Pending CN111261963A (en) | 2018-12-03 | 2018-12-03 | Energy type lithium iron phosphate battery testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111261963A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112193124A (en) * | 2020-09-29 | 2021-01-08 | 蜂巢能源科技有限公司 | Battery charging method, device, medium, battery management system and vehicle |
| CN112736310A (en) * | 2020-12-31 | 2021-04-30 | 惠州锂威新能源科技有限公司 | Charging and discharging method for improving consistency of K values of lithium ion batteries |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576318A (en) * | 2016-02-23 | 2016-05-11 | 上海电力学院 | Multi-parameter comprehensive determination method for determining consistency of electric automobile retired lithium batteries |
| CN107069120A (en) * | 2017-03-22 | 2017-08-18 | 广州小鹏汽车科技有限公司 | A kind of fast charging device and method of electric car automobile lithium ion battery |
| CN107317062A (en) * | 2017-06-30 | 2017-11-03 | 宁德时代新能源科技股份有限公司 | Battery charging method, apparatus and computer readable storage medium |
| CN107732337A (en) * | 2017-10-18 | 2018-02-23 | 中航锂电（洛阳）有限公司 | A kind of retired battery module method for separating |
| CN108051753A (en) * | 2017-12-05 | 2018-05-18 | 太原理工大学 | A kind of accelerated test method of long-life fast charging type ferric phosphate lithium cell |
| CN106093794B (en) * | 2016-08-01 | 2018-10-12 | 深圳市电科电源股份有限公司 | The high temperature service life accelerated test method of ferric phosphate lithium cell |
-
2018
- 2018-12-03 CN CN201811466129.6A patent/CN111261963A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576318A (en) * | 2016-02-23 | 2016-05-11 | 上海电力学院 | Multi-parameter comprehensive determination method for determining consistency of electric automobile retired lithium batteries |
| CN106093794B (en) * | 2016-08-01 | 2018-10-12 | 深圳市电科电源股份有限公司 | The high temperature service life accelerated test method of ferric phosphate lithium cell |
| CN107069120A (en) * | 2017-03-22 | 2017-08-18 | 广州小鹏汽车科技有限公司 | A kind of fast charging device and method of electric car automobile lithium ion battery |
| CN107317062A (en) * | 2017-06-30 | 2017-11-03 | 宁德时代新能源科技股份有限公司 | Battery charging method, apparatus and computer readable storage medium |
| CN107732337A (en) * | 2017-10-18 | 2018-02-23 | 中航锂电（洛阳）有限公司 | A kind of retired battery module method for separating |
| CN108051753A (en) * | 2017-12-05 | 2018-05-18 | 太原理工大学 | A kind of accelerated test method of long-life fast charging type ferric phosphate lithium cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112193124A (en) * | 2020-09-29 | 2021-01-08 | 蜂巢能源科技有限公司 | Battery charging method, device, medium, battery management system and vehicle |
| CN112736310A (en) * | 2020-12-31 | 2021-04-30 | 惠州锂威新能源科技有限公司 | Charging and discharging method for improving consistency of K values of lithium ion batteries |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104935045B (en) | Battery pack equalization method for energy storage system adopting nickel-series storage batteries | |
| US9954360B2 (en) | Energy store for a photovoltaic system, energy storage power plant, control device, and method for operating an energy store | |
| CN101640296B (en) | Quick charging method for improving storage battery specific capacity | |
| CN108336435B (en) | Lithium ion battery charging method considering charging energy efficiency | |
| US20240092211A1 (en) | Method and device for charging secondary battery, computer storage medium, and electronic equipment | |
| CN111261963A (en) | Energy type lithium iron phosphate battery testing method | |
| CN114006442A (en) | Battery energy storage power station energy management method considering charge state consistency | |
| CN104934648B (en) | Method and system for battery charging equalization control in power grid direct current screen system | |
| US20230029492A1 (en) | Charging and discharging apparatus and battery charging method | |
| CN107240925A (en) | The control method of energy storage battery system in a kind of micro-capacitance sensor | |
| CN116722621B (en) | Charging method of charger and charger thereof | |
| CN116345014B (en) | Large energy storage system thermal management method, electronic equipment and storage medium | |
| CN111261962A (en) | Operation and maintenance method of power type lithium iron phosphate battery | |
| CN117477623B (en) | Energy management system and control method of photovoltaic energy storage charging station | |
| Han et al. | Energy storage frequency response control considering battery aging of electric vehicle | |
| Brost | Performance of valve-regulated lead acid batteries in EV1 extended series strings | |
| CN111103549B (en) | Method for judging maintenance requirement of battery system of hybrid power locomotive | |
| CN116418076A (en) | Method for selecting and determining quantity of UPS storage batteries | |
| CN116760138A (en) | Staged battery charging method, system and charging equipment | |
| CN114879053A (en) | Method for predicting service life of energy storage lithium iron phosphate battery | |
| Sathishkumar et al. | Compatibility of lithium ion phosphate battery in solar off grid application | |
| CN113991197A (en) | Lithium ion battery and charging method thereof | |
| CN111430823B (en) | Integration method of power lithium battery system of electric automobile | |
| CN219436669U (en) | Equal charging circuit of elevator power supply storage battery | |
| KR102609887B1 (en) | Method of controling current rate using preheating for charging battery fast |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200609 |