CN113839440B - Method and device for charging battery, computer readable storage medium and processor - Google Patents
Method and device for charging battery, computer readable storage medium and processor Download PDFInfo
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- CN113839440B CN113839440B CN202111017338.4A CN202111017338A CN113839440B CN 113839440 B CN113839440 B CN 113839440B CN 202111017338 A CN202111017338 A CN 202111017338A CN 113839440 B CN113839440 B CN 113839440B
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- 238000007600 charging Methods 0.000 title claims abstract description 322
- 238000000034 method Methods 0.000 title claims abstract description 88
- 230000008569 process Effects 0.000 claims abstract description 58
- 238000012545 processing Methods 0.000 claims description 12
- 238000012790 confirmation Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 21
- 229910001416 lithium ion Inorganic materials 0.000 description 21
- 238000012360 testing method Methods 0.000 description 15
- 238000012544 monitoring process Methods 0.000 description 11
- 230000010355 oscillation Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 238000013523 data management Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 208000019901 Anxiety disease Diseases 0.000 description 3
- 230000036506 anxiety Effects 0.000 description 3
- 238000010280 constant potential charging Methods 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
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- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
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- 230000005653 Brownian motion process Effects 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
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- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
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- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00038—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
- H02J7/00041—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
- H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- 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 invention discloses a battery charging method, a battery charging device, a computer readable storage medium and a processor. Wherein the method comprises the following steps: dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage; and charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to at least one charging stage. The invention solves the technical problems of longer charging time and influence on the capacity and service life of the battery in the battery charging mode in the related technology.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a method and apparatus for charging a battery, a computer readable storage medium, and a processor.
Background
Along with the aggravation of energy and environmental crisis, the development of new energy is hot, and the lithium ion battery has the advantages of high voltage, large specific energy, no pollution, no memory effect, long service life and the like, and is paid attention to in various circles. The energy source is widely applied to mobile phones, digital cameras, notebook computers and other devices, and meanwhile, as an alternative energy source of traditional fossil energy sources, the application scale of the energy source on electric vehicles and hybrid electric vehicles is continuously enlarged, and most importantly, the energy source has undoubted application prospects in the field of power vehicles.
However, the application of electric vehicles is increasing, but the acceptance of electric vehicles is not optimistic, which involves mileage anxiety and charge anxiety. With the updating of battery materials and the continuous improvement of battery energy density, the continuous mileage of the electric automobile is gradually improved. The range of the passenger car is increased to 400km or more from the initial 150km, so that the range anxiety problem of the electric car is basically solved, and the charging becomes a core technical problem and even a focus problem of new middle and outer round of technical competition.
At present, the lithium battery is charged in a constant current and then constant voltage charging mode, and the two charging modes have great defects in practice. The constant current charging problem is that the charging curve of the rechargeable battery changes exponentially, the constant current is smaller than the acceptable maximum current of the rechargeable battery in the initial stage of charging, the charging time is prolonged, the acceptable capacity of the rechargeable battery is exceeded in the later stage, potential safety hazards of lithium precipitation affecting service life are caused, and meanwhile, electric energy cannot be effectively converted into chemical energy and becomes heat energy to be consumed. The problem of constant voltage charging is that the internal resistance of a rechargeable battery is small, and the initial current of constant voltage charging is large, so that the voltage is reduced, the charging is insufficient due to the too low voltage in the later period of charging, the internal part of the rechargeable battery cannot be subjected to effective chemical reaction due to long-term undercharge, and the capacity and the service life of the battery are reduced. The real lithium ions have the characteristic of static Brownian motion in the electrolyte and have dynamic drift trend, namely, the real lithium ions generate chemical ion reaction under the current excitation of potential difference, generally do not show specific rules, only have general trend, and are difficult to control. Particularly, the high-power charging is very easy to influence potential change, so that consistency deviation is accelerated, and the service life of a lithium battery system is greatly reduced.
In order to improve the charging capability of the lithium ion battery, the charging capability of the lithium ion battery can be improved by adopting a mode of stepwise transformation multiplying power and pulse discharging, however, the step-type charging cannot fully utilize the acceptable large current in the initial stage of charging, and meanwhile, the polarization cannot be effectively eliminated and cannot be widely utilized. In addition, the pulse discharge form appears to show the appearance of reduced voltage drop polarization, and the discharged electric quantity is just the lithium ion embedded in the cathode, but the charging capacity is not increased, and the charging time is prolonged.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a battery charging method, a device, a computer readable storage medium and a processor, which are used for at least solving the technical problems that the charging time is long, and the capacity and the service life of a battery are influenced in a battery charging mode in the related art.
According to an aspect of an embodiment of the present invention, there is provided a charging method of a battery, including: dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage; and charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to the at least one charging stage.
Optionally, when the at least one charging phase includes a plurality of charging phases, the method further includes: when the current charging stage reaches a preset charging condition, automatically switching to the next charging stage; and stopping charging the battery when the current charging stage reaches a preset cut-off condition.
Optionally, the charging process of the battery is divided into at least one charging phase, including at least one of the following ways: dividing a charging process into at least one charging stage according to the charging time of the battery; dividing a charging process into at least one charging stage according to a charging voltage of the battery; the charging process is divided into at least one charging phase according to the state of charge of the battery.
Optionally, charging the battery with the high-frequency oscillating current includes: controlling the oscillating current power supply to output high-frequency oscillating current according to the control parameters; and charging the battery according to the high-frequency oscillating current.
Optionally, before controlling the oscillating current power supply to output the high-frequency oscillating current according to the control parameter, the method includes: acquiring a charging parameter of the battery in a charging process, wherein the charging parameter comprises at least one of the following: voltage, current, temperature; and determining the control parameters of the battery in the charging process according to the charging parameters.
Optionally, the control parameter includes at least one of: waveform, frequency, amplitude, duty cycle.
Optionally, when the control parameter includes a frequency, the range of values of the frequency is: 0.5 kHz-15 kHz.
According to another aspect of the embodiment of the present invention, there is also provided a charging device for a battery, including: the processing module is used for dividing the charging process of the battery into at least one charging stage and acquiring a group of charging parameters and standing time corresponding to each charging stage; and the charging module is used for charging the battery with high-frequency oscillating current according to the charging parameters corresponding to the at least one charging stage and the standing time.
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program, when executed, controls a device in which the computer-readable storage medium is located to perform the method for charging a battery according to any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor for running a program, wherein the program executes the method for charging a battery according to any one of the above.
In the embodiment of the invention, the charging process of the battery is divided into at least one charging stage, and a group of charging parameters and standing time corresponding to each charging stage are obtained; according to the charging parameters corresponding to at least one charging stage and the standing time, the battery is charged by high-frequency oscillating current, and the high-frequency oscillating current is adopted in the charging process of the battery, so that the technical effects of improving the charging capacity of the battery, reducing the charging time and prolonging the cycle life of the battery are realized, and the technical problems that the charging time is long, and the capacity and the service life of the battery are influenced in the battery charging mode in the related technology are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a flowchart of a method of charging a battery according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a three electrode wiring in accordance with an alternative embodiment of the present invention;
FIG. 3 is a schematic diagram of cycle number versus capacity retention under different control parameters according to an alternative embodiment of the present invention;
fig. 4 is a schematic view of a charging device of a battery according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a method of charging a battery, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 1 is a flowchart of a method of charging a battery according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage;
step S104, the high-frequency oscillating current is charged to the battery according to the charging parameters and the standing time corresponding to at least one charging stage.
The above battery includes, but is not limited to, lithium ion battery, lead acid battery, nickel-chromium battery, nickel-hydrogen battery, etc.
Through the steps, the charging process of the battery can be divided into at least one charging stage, and a group of charging parameters and standing time corresponding to each charging stage are obtained; according to the charging parameters corresponding to at least one charging stage and the standing time, the battery is charged by high-frequency oscillating current, and the high-frequency oscillating current is adopted in the charging process of the battery, so that the technical effects of improving the charging capacity of the battery, reducing the charging time and prolonging the cycle life of the battery are realized, and the technical problems that the charging time is long, and the capacity and the service life of the battery are influenced in the battery charging mode in the related technology are solved.
Optionally, when the at least one charging phase includes a plurality of charging phases, the method further includes: when the current charging stage reaches a preset charging condition, automatically switching to the next charging stage; and stopping charging the battery when the current charging stage reaches a preset cut-off condition.
Alternatively, the division of the charging process of the battery into at least one charging phase may take the form of at least one of the following: dividing a charging process into at least one charging stage according to the charging time of the battery; dividing a charging process into at least one charging stage according to a charging voltage of the battery; the charging process is divided into at least one charging phase according to the state of charge of the battery.
Optionally, charging the battery with the high-frequency oscillating current includes: controlling the oscillating current power supply to output high-frequency oscillating current according to the control parameters; and charging the battery according to the high-frequency oscillating current.
Optionally, before controlling the oscillating current power supply to output the high-frequency oscillating current according to the control parameter, the method includes: acquiring charging parameters of the battery in a charging process, wherein the charging parameters comprise, but are not limited to, voltage, current, temperature and the like; and determining control parameters of the battery in the charging process according to the charging parameters.
Optionally, the control parameters include, but are not limited to, waveform, frequency, amplitude, duty cycle, etc.
Optionally, when the control parameter includes a frequency, the range of values of the frequency is: 0.5 kHz-15 kHz.
In an alternative embodiment, the oscillating current power supply is used for outputting different waveforms, high-frequency oscillating currents with different frequencies, amplitudes and duty ratios are used for charging the lithium ion battery, n groups of charging parameters of n (more than or equal to 1) charging stages are set in the battery charging process, ts (t more than or equal to 0) standing time can be set after each charging stage, the high-frequency oscillating current is charged by using the charging parameters, when the charging preset conditions are reached in different charging stages, the charging is automatically switched to the next charging stage, and when the preset cut-off conditions are reached, the battery is stopped.
It should be noted that the oscillating current power supply includes a data acquisition module, a data management module and a control module, where the data acquisition module may be used for acquiring voltage, current and temperature of the battery, the module or the battery pack in multiple ways; the data management module can calculate control parameters in the charging process according to the collected data; the control module can adjust the charging parameters according to the set output and can also calculate the control parameters according to the charging process to control the state of the output current.
Further, the high frequency oscillating current waveforms include, but are not limited to, square waves and sine waves; the frequency of the high-frequency oscillation current is 0.5 kHz-15 kHz, and particularly indicates that the optimal current frequency of the battery of each material and process is different; the amplitude of the high-frequency oscillation current charging is the highest charging multiplying power and is 1C-15C; the duty ratio of the high-frequency oscillation current charging is the ratio of charging time to period in one charging period, and optionally, the ratio can be set to be 5% -50%; the n (n is more than or equal to 1) charging stages are divided by voltage or charge quantity (SOC), and n groups of charging parameters are the same and the charging stages are different; for the standing time, setting after the charging stage, wherein the time t is more than or equal to 0s; in addition, in the charging process, the charging termination is controlled by detecting and managing the collected data and judging the output control parameters.
In addition, the charging capability data originates from a battery equipped with a third electrode. The purpose of the three-electrode arrangement is to ascertain an acceptable charge rate of the battery, i.e. no lithium evolution occurs during charging at the selected charge rate (here the potential between the negative electrode and the three-electrode is defined as > 0V). Fig. 2 is a schematic diagram of a three-electrode wiring according to an alternative embodiment of the present invention, as shown in fig. 2, which is prepared in a conventional manner unless otherwise specified.
In the above embodiment of the present invention, the use of high-frequency oscillating current, current of variable amplitude and duty cycle to charge the lithium ion battery has the following advantages:
1. according to the method, high-frequency oscillation current is adopted in the charging process, so that lithium ions are more orderly combined with the negative electrode and the lithium ions in the transmission process, thereby reducing accumulation of ohmic polarization, concentration polarization and electrochemical polarization, reducing temperature rise in the charging process and improving charging capacity;
2. the high-frequency oscillation current is adopted, so that the charging capacity of the battery is improved, and the equivalent charging multiplying power is improved, so that the charging time is shortened, and the charging efficiency is higher;
3. in the cyclic utilization process of the lithium ion battery, with the increase of the cyclic times, the increase of side reactions and the low transmission efficiency of lithium ions in the lithium ion battery are inevitably caused, so that the service life is attenuated, and the high-frequency oscillating current stimulates the lithium ion transmission by adopting high-rate current in the charging process, but long-time high-rate charging is avoided, so that the stability of the lithium ion transmission on the surface of a negative electrode is effectively controlled, the state of a solid electrolyte interface (Solid Electrolyte Interface, SEI) film is protected, the side reactions of free electrolyte and the negative electrode material are well protected, the cyclic life of the lithium ion battery is greatly prolonged, and the damage to the battery is reduced;
in conclusion, the lithium ion battery can be charged by adopting the high-frequency oscillation current and changing the amplitude, the frequency and the duty ratio, so that the charging capacity of the lithium ion battery is effectively improved, the charging time is reduced, and the cycle life is prolonged.
Alternative embodiments of the present invention are described in detail below.
The battery is prepared with a reference electrode battery and a reference electrode-free battery core which is in the same batch and same type as the system, wherein the special battery is used for evaluating the charging capability of the battery, and the non-special battery is used for evaluating the cycle life.
Embodiment 1
The oscillation power supply intelligent control module and the data management module are utilized to calculate and control and output a group of charging parameters, in the embodiment, single-stage charging is adopted, and the charging cut-off condition is 0-80% SOC. The control steps are as follows:
step 1, connecting a tested battery cell with a main line of the equipment, monitoring voltage, monitoring positive and negative reference electrodes and fixing temperature monitoring connection, and ensuring that virtual connection and other phenomena do not occur in the process;
step 2, inputting a process parameter current amplitude of 8C, a frequency of 1.2kHz, a duty ratio of 20%,30% and 40% through intelligent control equipment, and setting the device to stand after charging in a charging stage n=1 and no stage. In addition, the battery discharge multiplying power selects 1C constant current discharge, and the cut-off voltage is the lower limit voltage of the battery to be tested;
step 3, opening a self-checking program of the equipment to detect whether the voltage and internal resistance of the battery cell to be tested meet the basic characteristics of the battery cell to be tested;
step 4, after the preparation is finished, testing is sequentially carried out according to the set control parameters, and battery data information is calculated through the data record management module.
Embodiment 2
The oscillation power supply intelligent control module and the data management module are utilized to calculate and control and output a group of charging parameters, in the embodiment, single-stage charging is adopted, and the charging cut-off condition is 0-80% SOC. The control steps are as follows:
step 1, connecting a tested battery cell with a main line of the equipment, monitoring voltage, monitoring positive and negative reference electrodes and fixing temperature monitoring connection, and ensuring that virtual connection and other phenomena do not occur in the process;
step 2, inputting a process parameter current amplitude of 8C through intelligent control equipment, testing the frequency of 1.0 and 1.4kHz in sequence, setting the duty ratio of 30%, charging the battery in a charging stage n=1, and standing the battery after no-stage charging. In addition, the battery discharge multiplying power selects 1C constant current discharge, and the cut-off voltage is the lower limit voltage of the battery to be tested;
step 3, opening a self-checking program of the equipment to detect whether the voltage and internal resistance of the battery cell to be tested meet the basic characteristics of the battery cell to be tested;
step 4, after the preparation is finished, testing is sequentially carried out according to the set control parameters, and battery data information is calculated through the data record management module.
Comparative example 1
The oscillation power supply intelligent control module and the data management module are utilized to calculate and control and output a group of charging parameters, in the embodiment, single-stage charging is adopted, and the charging cut-off condition is 0-80% SOC. The control steps are as follows:
step 1, connecting a tested battery cell with a main line of the equipment, monitoring voltage, monitoring positive and negative reference electrodes and fixing temperature monitoring connection, and ensuring that virtual connection and other phenomena do not occur in the process;
step 2, inputting process parameters through the intelligent control equipment, sequentially testing current values to be 1.6C,2.4C and 3.2C, charging the battery in a charging stage n=1, and standing the battery after stageless charging. In addition, the battery discharge multiplying power selects 1C constant current discharge, and the cut-off voltage is the lower limit voltage of the battery to be tested;
step 3, opening a self-checking program of the equipment to detect whether the voltage and internal resistance of the battery cell to be tested meet the basic characteristics of the battery cell to be tested;
step 4, after the preparation is finished, testing is sequentially carried out according to the set control parameters, and battery data information is calculated through the data record management module.
The following data were obtained by analyzing the comparison of the above examples and comparative examples, and the effect of different charging parameters on the charging results is shown in table 1.
TABLE 1
Note that, in table 1, open circuit voltage of the battery when the charge reaches the charge cutoff condition; in table 2, the potential difference (V) between the negative electrode and the third electrode is defined herein as having a certain damage to the cell charge when the value is below 0; in table 3, the temperature rise is shown, the initial temperature is 25 ℃, and the temperature rise is the difference between the highest temperature value and the standard temperature in the charging process.
Embodiment 3
By using the control ideas in embodiment 1 and embodiment 2, the cycle life test is performed by using more excellent experimental conditions (8C-1.2 kHz-30% and 8C-1.2 kHz-40%) and the battery cell which is not specially used for the cycle, and the conditions of the cycle test are as follows:
1. the intelligent equipment and the control thought selected in the embodiments 1 and 2 are adopted;
2. the battery cell with the cycle life is placed in a constant temperature box at 25 ℃ for testing;
3. the test charging conditions are respectively 8C-1.2kHz-30% and 8C-1.2kHz-40%, wherein each test condition is carried out on different batteries in the same batch. Charging range is 0-80% SOC; the discharge condition is 1C constant current discharge, the depth of discharge is 80% DOD (80% -0% SOC);
4. and (3) placing for 1h between charging and discharging, and monitoring and recording current and voltage and temperature rise (lower than a preset alarm value) of a battery selection point by the intelligent equipment.
Comparative example 2
By using the control thought in comparative example 1, experimental conditions (2.4C and 3.2C constant current charging) and non-specially-made battery cells for circulation were selected for cycle life test, and the conditions of cycle test were:
1. the intelligent equipment and the control thought selected in the comparative example 1 are adopted;
2. the battery cell with the cycle life is placed in a constant temperature box at 25 ℃ for testing;
3. the test charging conditions were selected from 2.4C and 3.2C constant current charging, where each test condition was performed on a different battery of the same batch. Charging range is 0-80% SOC; the discharge condition is 1C constant current discharge, and the depth of discharge is 80% DOD (80% -0% SOC).
4. And (3) placing for 1h between charging and discharging, and monitoring and recording current and voltage and temperature rise (lower than a preset alarm value) of a battery selection point by the intelligent equipment.
In summary, fig. 3 is a schematic diagram of the relationship between the cycle times and the capacity retention rate under different control parameters according to an alternative embodiment of the present invention, as shown in fig. 3, the present invention charges the lithium ion battery by changing the amplitude, the frequency and the duty ratio by using the high-frequency oscillating current, so as to effectively improve the charging capability of the lithium ion battery and reduce the temperature rise, thereby improving the charging rate, improving the charging efficiency, reducing the charging time, and simultaneously increasing the cycle life.
Example 2
According to another aspect of the embodiment of the present invention, there is also provided a charging device for a battery, fig. 4 is a schematic diagram of the charging device for a battery according to an embodiment of the present invention, and as shown in fig. 4, the charging device for a battery includes: a processing module 42 and a charging module 44. The charging device of the battery will be described in detail.
The processing module 42 is configured to divide a charging process of the battery into at least one charging phase, and obtain a set of charging parameters and a rest time corresponding to each charging phase; the charging module 44 is connected to the processing module 42, and is configured to charge the battery with a high-frequency oscillating current according to the charging parameter and the rest time corresponding to at least one charging stage.
It should be noted that each of the above modules may be implemented by software or hardware, for example, in the latter case, it may be implemented by: the above modules may be located in the same processor; and/or the above modules are located in different processors in any combination.
In the above embodiment, the charging device of the battery can use high-frequency oscillation current in the charging process of the battery, thereby realizing the technical effects of improving the charging capacity of the battery, reducing the charging time and prolonging the cycle life of the battery, and further solving the technical problems that the charging time is longer and the battery capacity and the service life are influenced in the battery charging mode in the related technology.
Here, it should be noted that the above-mentioned processing module 42 and the charging module 44 correspond to steps S102 to S104 in embodiment 1, and the above-mentioned modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in embodiment 1 above.
Optionally, when the at least one charging phase includes a plurality of charging phases, the apparatus further includes: the switching module is used for automatically switching to the next charging stage when the current charging stage reaches the preset charging condition; and the stopping module is used for stopping charging the battery when the current charging stage reaches a preset cut-off condition.
Optionally, the processing module 42 includes: the first processing unit is used for dividing the charging process into at least one charging stage according to the charging time of the battery; the second processing unit is used for dividing the charging process into at least one charging stage according to the charging voltage of the battery; and the third processing unit is used for dividing the charging process into at least one charging stage according to the charge state of the battery.
Optionally, the charging module 44 includes: the control unit is used for controlling the oscillating current power supply to output high-frequency oscillating current according to the control parameters; and the charging unit is used for charging the battery according to the high-frequency oscillating current.
Optionally, the charging module 44 further includes: the acquisition unit is used for acquiring the charging parameters of the battery in the charging process before the control parameter controls the oscillating current power supply to output the high-frequency oscillating current, wherein the charging parameters comprise at least one of the following components: voltage, current, temperature; and the determining unit is used for determining the control parameters of the battery in the charging process according to the charging parameters.
Optionally, the control parameter includes at least one of: waveform, frequency, amplitude, duty cycle.
Optionally, when the control parameter includes a frequency, the range of values of the frequency is: 0.5 kHz-15 kHz.
Example 3
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the apparatus in which the computer-readable storage medium is controlled to execute the method for charging the battery of any one of the above when the program is run.
Alternatively, in this embodiment, the above-mentioned computer-readable storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network and/or in any one of the mobile terminals in the mobile terminal group, and the above-mentioned computer-readable storage medium includes a stored program.
Optionally, the computer readable storage medium is controlled to perform the following functions when the program is run: dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage; and charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to at least one charging stage.
Example 4
According to another aspect of the embodiments of the present invention, there is also provided a processor for running a program, wherein the program executes the method for charging a battery according to any one of the above.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes the following steps when executing the program: dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage; and charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to at least one charging stage.
The invention also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of: dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage; and charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to at least one charging stage.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (6)
1. A method of charging a battery, comprising:
dividing the charging process of the battery into at least one charging stage, and obtaining a group of charging parameters and standing time corresponding to each charging stage;
charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to the at least one charging stage;
when the at least one charging phase includes a plurality of charging phases, further comprising: when the current charging stage reaches a preset charging condition, automatically switching to the next charging stage; stopping charging the battery when the current charging stage reaches a preset cut-off condition;
charging the battery with high-frequency oscillating current, comprising: controlling the oscillating current power supply to output high-frequency oscillating current according to the control parameters; charging the battery according to the high-frequency oscillating current, wherein the control parameters comprise at least one of the following: waveform, frequency, amplitude, duty cycle;
before the control of the oscillating current power supply to output the high-frequency oscillating current according to the control parameters, the method comprises the following steps:
acquiring a charging parameter of the battery in a charging process, wherein the charging parameter comprises at least one of the following: voltage, current, temperature;
and determining the control parameters of the battery in the charging process according to the charging parameters.
2. The method according to claim 1, characterized in that the charging process of the battery is divided into at least one charging phase, comprising at least one of the following ways:
dividing a charging process into at least one charging stage according to the charging time of the battery;
dividing a charging process into at least one charging stage according to a charging voltage of the battery;
the charging process is divided into at least one charging phase according to the state of charge of the battery.
3. The method of claim 1, wherein when the control parameter comprises a frequency, the range of values for the frequency is: 0.5 kHz-15 kHz.
4. A charging device for a battery, comprising:
the processing module is used for dividing the charging process of the battery into at least one charging stage and acquiring a group of charging parameters and standing time corresponding to each charging stage;
the charging module is used for charging the battery with high-frequency oscillating current according to the charging parameters and the standing time corresponding to the at least one charging stage;
when the at least one charging phase includes a plurality of charging phases, the apparatus further includes: the switching module is used for automatically switching to the next charging stage when the current charging stage reaches the preset charging condition; the stopping module is used for stopping charging the battery when the current charging stage reaches a preset cut-off condition;
the charging module includes: the control unit is used for controlling the oscillating current power supply to output high-frequency oscillating current according to the control parameters; the charging unit is used for charging the battery according to the high-frequency oscillating current, and the control parameters comprise at least one of the following: waveform, frequency, amplitude, duty cycle;
wherein the apparatus further comprises:
an obtaining unit, configured to obtain a charging parameter of the battery during a charging process, where the charging parameter includes at least one of: voltage, current, temperature;
and the confirmation unit is used for determining the control parameters of the battery in the charging process according to the charging parameters.
5. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to perform the method of charging a battery according to any one of claims 1 to 3.
6. A processor for running a program, wherein the program when run performs the method of charging a battery as claimed in any one of claims 1 to 3.
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