CN116154882A - Rechargeable battery charging control method, device and charging module - Google Patents
Rechargeable battery charging control method, device and charging module Download PDFInfo
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 20
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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
- H02J7/007182—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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a rechargeable battery charging control method, a rechargeable battery charging control device and a rechargeable battery charging module. The charge control method includes: loading a pre-configured charging strategy in response to connection of the rechargeable battery to a charging power source; controlling a charging process of the rechargeable battery by the charging power supply according to the charging strategy; wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases; and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase. The method can improve the charging speed of the rechargeable battery and shorten the charging time.
Description
Technical Field
The embodiment of the disclosure relates to a rechargeable battery charging control method, a rechargeable battery charging control device and a rechargeable battery charging module.
Background
Under the large environment of 'double carbon' target and energy transformation, the electric power conversion becomes the necessary direction of the development of the automobile industry, the acceptance of people to new energy automobiles is rapidly rising, and 'fast charging' is taken as a way for rapidly supplementing the electric quantity of the electric automobiles, so that the mileage anxiety and the endurance anxiety of electric automobile owners can be remarkably relieved, the user experience is improved, and the 'fast charging' also becomes the research and development key point of new energy related enterprises.
How to increase the charging speed of rechargeable batteries to meet the needs of users is a technical problem that needs to be solved currently.
Disclosure of Invention
In view of the above, the present application provides a rechargeable battery charging control method, device and charging module, which can increase the charging speed of the rechargeable battery and shorten the charging time.
In order to solve the technical problems, the technical scheme of the application is realized as follows:
in one embodiment, there is provided a charge control method of a rechargeable battery, the charge control method including:
loading a pre-configured charging strategy in response to connection of the rechargeable battery to a charging power source;
controlling a charging process of the rechargeable battery by the charging power supply according to the charging strategy;
wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases;
and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
In another embodiment, there is provided a rechargeable battery charging device, the device comprising: the device comprises a response unit, a loading unit and a control unit;
the response unit is used for responding to the connection of the rechargeable battery and the charging power supply;
the loading unit is used for loading a pre-configured charging strategy when the response unit responds to the connection of the rechargeable battery and the charging power supply;
the control unit is used for controlling the charging process of the rechargeable battery by the charging power supply according to the charging strategy loaded by the loading unit; wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases; and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
In another embodiment, an electronic device is provided for being packaged in a rechargeable battery module, and the electronic device includes a processor that performs, for example, a rechargeable battery charge control method.
In another embodiment, a rechargeable battery module is provided that includes a bare cell, and the electronic device, wherein the electronic device and the bare cell are integrally packaged.
In another embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which program, when executed by a processor, implements a rechargeable battery charge control method.
In another embodiment, a computer program product is provided, comprising a computer program that when executed by a processor implements a rechargeable battery charge control method.
As can be seen from the above technical solutions, in the above embodiments, the rechargeable battery is charged according to the configured constant-power constant-voltage charging strategy in the charging process, and the current gradually decreases in each charging stage, so that the charging speed can be increased, and the charging time can be shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic diagram of a charging policy determination flow according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a process for determining a lithium separation curve in an embodiment of the present application;
fig. 3 is a schematic diagram of a correspondence between a lithium separation curve and a chargeable area in an embodiment of the present application;
FIG. 4 is a schematic diagram of a charging control flow of a rechargeable battery according to an embodiment of the present application;
FIG. 5 is a schematic flow chart of a charging process of a rechargeable battery by a charging power source according to a charging strategy according to an embodiment of the present application;
FIG. 6 is a schematic flow chart of determining a first constant power charging phase of a charging process in an embodiment of the present application;
FIG. 7 is a schematic diagram of a rechargeable battery charging control device according to an embodiment of the present application;
fig. 8 is a schematic diagram of an entity structure of an electronic device according to an embodiment of the present invention.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, 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 embodiments of the invention described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
According to the rechargeable battery charging method, the rechargeable battery is charged according to the configured constant-power constant-voltage charging strategy in the charging process, and the current gradually decreases in each charging stage, so that the charging speed can be improved, and the charging time can be shortened.
The rechargeable battery may be a single battery or a battery pack composed of a plurality of batteries. In particular implementations, the rechargeable battery may be a lithium battery, but is not limited to a lithium battery charging implementation.
In the embodiments of the present application, it is desirable to encapsulate the charging strategy in the rechargeable battery when producing the rechargeable battery. The charging strategy is determined by a test result of a charging test of a three-electrode battery including a positive electrode, a negative electrode and a reference electrode;
the three-electrode battery is manufactured by using the same positive and negative electrode materials as the rechargeable battery and the electrode material used as the reference electrode in an environment with a dew point lower than-40 ℃. The specific manufacturing process is as follows:
under the environment that the dew point is lower than minus 40 ℃, the positive plate, the negative plate and the diaphragm of the rechargeable battery are manufactured, and the copper wires treated by the surface oxide layer are used for stacking the positive plate, the diaphragm and the negative plate in sequence; placing the wrapped copper wire between the negative electrode and the diaphragm by using the diaphragm, and positioning the wrapped copper wire at the central position of the battery cell;
and after the battery core is assembled, the three-electrode battery is obtained by sequentially carrying out the treatments of welding the electrode lug, packaging an aluminum plastic film, forming a small current, fixing the volume by a standard flow, plating lithium and the like.
The rechargeable battery is manufactured by using the positive electrode plate, the negative electrode plate and the diaphragm, and the three-electrode battery not only uses the positive electrode plate, the negative electrode plate and the diaphragm which are the same as those of the rechargeable battery, but also uses copper wires treated by the surface oxide layer to realize a zero electrode;
after the battery core is assembled, the processing procedures of welding the electrode lug, packaging the aluminum plastic film, forming the small current, fixing the volume by a standard flow, plating lithium and the like are the same as those of the rechargeable battery.
The three electrodes of the three-electrode battery pack are: positive, negative, and zero, also referred to as reference.
Wherein the test result comprises: based on each of a plurality of preset constant-power constant-voltage alternating charging strategies, respectively carrying out charging test on the three-electrode battery to obtain a test result;
the plurality of constant-power constant-voltage alternating charging strategies are determined according to a predetermined charging feasible region, and the charging feasible region is determined according to a lithium separation curve calibrated for the three-stage battery;
the lithium separation curve is obtained by fitting a plurality of groups of acquired test power and charging time; and the test power and the charging time are obtained by performing charging test on the three-electrode battery according to the set multiple powers.
In the constant power charging stage and the constant voltage charging stage, the current gradually decreases in an inverse proportion function, and the current gradually decreases in a step slope manner in the whole charging process.
The following describes the acquisition process of the charging strategy in detail with reference to the drawings. Referring to fig. 1, fig. 1 is a schematic diagram of a charging policy determination flow according to an embodiment of the present application. The method comprises the following specific steps:
Referring to fig. 2, fig. 2 is a schematic diagram of a process for determining a lithium separation curve in an embodiment of the present application. The method comprises the following specific steps:
in step 201, the capacity and energy of the tertiary battery is determined.
In specific implementation, the capacity and energy of the three-electrode battery can be determined by charging and discharging the three-electrode battery to a constant volume.
And 202, respectively charging the three-electrode battery according to the set charging powers to obtain the corresponding relation between the power and time.
Setting a plurality of charging powers, and testing for each power:
connecting a three-level battery in a zero-electricity state to a test cabinet, and monitoring potential changes among a positive level, a negative level and a reference electrode of the three-electrode battery in the charging process by using a potential recording device;
and when the potential difference between the negative electrode and the reference electrode is reduced to 0mV again, continuously reducing the charging power for charging, repeatedly executing until the charging is finished, and recording the potentials and time of the positive electrode, the negative electrode and the reference electrode of the three-stage battery.
And acquiring the potentials and time of the positive electrode, the negative electrode and the reference electrode of the three-electrode battery corresponding to charging under different powers.
And 203, fitting through the acquired test power and the corresponding charging time to obtain a lithium separation curve of the three-electrode battery.
And ending the lithium separation curve acquisition process.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a correspondence between a lithium analysis curve and a chargeable area in an embodiment of the present application. In fig. 3, the area surrounded by the lithium separation curve and the coordinate axis is a chargeable area, and the other area is a non-chargeable area.
In addition, in the charging process using the set charging strategy in the embodiment of the application, the charging amount in a certain time includes the sum of the constant power charging stage and the constant voltage charging stage, which is more than the charging total amount in the constant current charging process, so that the time for charging to a certain charging amount in the charging process in the embodiment of the application is determined to be shorter.
Each charging strategy of the set plurality of constant-power constant-voltage charging strategies is as follows: and charging in a plurality of continuous and alternating constant-power charging stages and constant-voltage charging stages, setting corresponding power for each constant-power charging stage, setting corresponding voltage for each constant-voltage charging stage, gradually reducing the charging power in the constant-power charging stages from front to back, and gradually reducing the charging voltage in the constant-voltage charging stages from front to back.
And 104, respectively carrying out charging test on the three-electrode battery based on the set multiple constant-power constant-voltage charging strategies to obtain a test result.
The test results obtained for each charging strategy include: charge time, and the lowest point of the negative electrode.
To this end, an optimal charging strategy is selected for packaging into the corresponding rechargeable battery.
Next, a charging control process of the rechargeable battery in the embodiment of the present application will be described in detail with reference to the accompanying drawings.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a charging control flow of a rechargeable battery according to an embodiment of the present application. The method comprises the following specific steps:
The charging strategy is determined by a test result of a charging test of a three-electrode battery comprising a positive electrode, a negative electrode and a reference electrode;
wherein the test result comprises: based on each of a plurality of preset constant-power constant-voltage alternating charging strategies, respectively carrying out charging test on the three-electrode battery to obtain a test result;
and the plurality of constant-power constant-voltage alternating charging strategies are determined according to a predetermined charging feasible region, and the charging feasible region is determined according to a lithium separation curve calibrated for the three-stage battery.
The lithium separation curve is obtained by fitting a plurality of groups of acquired test power and charging time; and the test power and the charging time are obtained by performing charging test on the three-electrode battery according to the set multiple powers.
The three-electrode battery is manufactured by using the same positive and negative electrode materials as the rechargeable battery and the electrode material used as the reference electrode in an environment with a dew point lower than-40 ℃.
Wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases;
and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
Referring to fig. 5, fig. 5 is a schematic flow chart of a charging process of controlling a charging power source to charge a rechargeable battery according to a charging strategy in an embodiment of the application. The method comprises the following specific steps:
step 501 is to determine the first of the constant power charging phases of the charging process based on the charging strategy and the current voltage of the rechargeable battery before the charging process begins.
Referring to fig. 6, fig. 6 is a schematic flow chart of determining a first constant power charging phase of a charging process in an embodiment of the present application. The method comprises the following specific steps:
and step 601, comparing the current voltage with a charging voltage set for the constant voltage charging stage in the charging strategy.
If three constant voltage charging phases and three constant power charging phases are set, the following steps are specifically: a first constant power charging stage, a first constant voltage charging stage, a second constant power charging stage, a second constant voltage charging stage, a third constant power charging stage, and a third constant voltage charging stage.
And the charging power of the three constant power charging stages from front to back is as follows in sequence: p1, P2, P3, and P1 is greater than P2, P2 is greater than P3; the charging voltages from the front to the rear three constant voltage charging stages (first constant voltage charging) are in order: v1, V2, V3, V1 is greater than V2, V2 is greater than N3.
The current voltage is used to compare with V1, V2 and V3.
If V2 and V3 are both greater than the current voltage, then V2 is closer to the current voltage, and the selected voltage is determined to be V2.
The constant voltage stage corresponding to V2 is a second constant voltage charging stage, the previous constant power charging stage of the second constant voltage charging stage is a second constant power charging stage, and the second constant power charging stage is taken as the first constant power charging stage.
Taking the example of alternately charging N constant power charging phases and N constant voltage charging phases, the step of controlling the alternation of the constant power charging phases and the constant voltage charging phases specifically includes:
when the charging voltage of the ith constant power charging stage is controlled to be the charging voltage set for the ith constant voltage charging stage, ending the ith constant power charging stage;
when the charging power of the ith constant voltage charging stage is controlled to be the charging power set for the (i+1) th constant power charging stage, ending the ith constant voltage charging stage;
when the charging power of the Nth constant voltage charging stage is controlled to be the set lower limit power, ending the charging of the rechargeable battery;
wherein i is an integer greater than 0 and less than N, and N is the number of constant voltage charging stages.
The power involved in the embodiments of the present application may be represented by E rate, which refers to a power value required when the battery discharges its rated energy in a preset time, where the unit is the same as the power, both are W,1E is equal in value to the rated energy of the battery, and E rate is inversely proportional to time.
The E rate can be simultaneously applied to the single battery and the battery pack, namely, the E rate of the single battery is related to the rated capacity of the single battery, and the E rate of the battery pack is related to the rated capacity of the battery pack.
The E-rate can be defined as the ratio of the rated energy of the battery to the preset time, which is equal to the product of the current C-rate and the rated voltage, that is to say, the power expression mode defined in the application discharges the influencing factor of the voltage change, and the calculated power has high accuracy and only needs the most basic parameters: the battery rated energy can be determined.
Based on the definition mode of the E rate, the maximum charging power of the battery pack can be calculated rapidly in the embodiment of the application:
P(pack，max)＝P(cell，max)×E(pack)；
wherein P (pack, max) is the maximum charging power of the battery pack;
p (cell, max) is the maximum charge E rate of the cell;
e (pack) is the battery pack rated energy.
Based on the same inventive concept, a rechargeable battery charging device is also provided in the embodiments of the present application. Referring to fig. 7, fig. 7 is a schematic structural diagram of a region processing apparatus in an embodiment of the present application. The device comprises: a response unit 701, a loading unit 702, and a control unit 703;
a response unit 701 for responding to connection of the rechargeable battery to the charging power source;
a loading unit 702 for loading a pre-configured charging policy when the responding unit 701 responds to the connection of the rechargeable battery and the charging power supply;
a control unit 703, configured to control a charging process of the rechargeable battery by the charging power supply according to the charging policy loaded by the loading unit 702; wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases; and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
In a further embodiment of the present invention,
the control unit 703, specifically configured to control a charging process of the rechargeable battery by the charging power supply according to the charging policy, includes: determining a first of the constant power charging phases of the charging process according to the charging strategy and a current voltage of the rechargeable battery before the charging process begins; control starts charging from the first of the constant-power charging phases, and controls alternation of the constant-power charging phases and the constant-voltage charging phases.
In a further embodiment of the present invention,
the control unit 703 is specifically configured to determine, according to the charging policy and a current voltage of the rechargeable battery before the charging process starts, a first constant power charging phase of the charging process, where the method includes: comparing the current voltage with a charging voltage set for the constant voltage charging stage in the charging strategy; determining a selected charging voltage from a plurality of charging voltages, wherein the selected charging voltage is one of the charging voltages which is greater than or equal to the current voltage and is closest to the current voltage; and determining the previous constant power charging stage of the constant voltage charging stage corresponding to the selected charging voltage as the first constant power charging stage.
In a further embodiment of the present invention,
the control unit 703, specifically configured to control the alternation of the constant power charging phase and the constant voltage charging phase, includes: when the charging voltage of the ith constant power charging stage is controlled to be the charging voltage set for the ith constant voltage charging stage, ending the ith constant power charging stage; when the charging power of the ith constant voltage charging stage is controlled to be the charging power set for the (i+1) th constant power charging stage, ending the ith constant voltage charging stage; when the charging power of the Nth constant voltage charging stage is controlled to be the set lower limit power, ending the charging of the rechargeable battery; wherein i is an integer greater than 0 and less than N, and N is the number of constant voltage charging stages.
In a further embodiment of the present invention,
the charging strategy is determined by a test result of a charging test of a three-electrode battery comprising a positive electrode, a negative electrode and a reference electrode;
wherein the test result comprises: based on each of a plurality of preset constant-power constant-voltage alternating charging strategies, respectively carrying out charging test on the three-electrode battery to obtain a test result;
and the plurality of constant-power constant-voltage alternating charging strategies are determined according to a predetermined charging feasible region, and the charging feasible region is determined according to a lithium separation curve calibrated for the three-stage battery.
In a further embodiment of the present invention,
the lithium separation curve is obtained by fitting a plurality of groups of acquired test power and charging time; and the test power and the charging time are obtained by performing charging test on the three-electrode battery according to the set multiple powers.
In a further embodiment of the present invention,
the three-electrode battery is manufactured by using the same positive and negative electrode materials as the rechargeable battery and the electrode material used as the reference electrode in an environment with a dew point lower than-40 ℃.
In another embodiment, the charging power of the constant power charging phase in the charging strategy is represented by E-rate; wherein the E-rate is a power value required when discharging its rated energy within a preset time.
The units of the above embodiments may be integrated or may be separately deployed; can be combined into one unit or further split into a plurality of sub-units.
In another embodiment, an electronic device is provided for being packaged in a rechargeable battery module, and the electronic device includes a processor that performs, for example, a rechargeable battery charge control method.
In another embodiment, a rechargeable battery module is provided that includes a bare cell, and the electronic device, wherein the electronic device and the bare cell are integrally packaged.
In another embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which program, when executed by a processor, implements a rechargeable battery charge control method.
In another embodiment, a computer program product is provided, comprising a computer program that when executed by a processor implements a rechargeable battery charge control method.
Fig. 8 is a schematic diagram of an entity structure of an electronic device according to an embodiment of the present invention. As shown in fig. 8, the electronic device may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein Processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may call logic instructions in the memory 830 to perform the following method:
loading a pre-configured charging strategy in response to connection of the rechargeable battery to a charging power source;
controlling a charging process of the rechargeable battery by the charging power supply according to the charging strategy;
wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases;
and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, 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 removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
In another embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, implements the steps of the region processing method.
The flowcharts and block diagrams in the figures of the present application illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Those skilled in the art will appreciate that the features recited in the various embodiments and/or claims disclosed herein may be combined in various combinations and/or combinations, even if such combinations or combinations are not explicitly recited in the present application. In particular, the features recited in the various embodiments and/or claims of the present application may be combined in various combinations and/or combinations without departing from the spirit and teachings of the application, all of which are within the scope of the disclosure.
The principles and embodiments of the present invention have been described herein with reference to specific examples, which are intended to be included herein for purposes of illustration only and not to be limiting of the invention. It will be apparent to those skilled in the art that variations can be made in the present embodiments and in the scope of the application in accordance with the spirit and principles of the present invention, and any modifications, equivalent substitutions, improvements, etc. are intended to be included within the scope of the present application.
Claims (13)
1. A charge control method of a rechargeable battery, the charge control method comprising:
loading a pre-configured charging strategy in response to connection of the rechargeable battery to a charging power source;
controlling a charging process of the rechargeable battery by the charging power supply according to the charging strategy;
wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases;
and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
2. The charge control method according to claim 1, wherein the controlling the charging process of the rechargeable battery by the charging power supply according to the charging policy includes:
determining a first of the constant power charging phases of the charging process according to the charging strategy and a current voltage of the rechargeable battery before the charging process begins;
control starts charging from the first of the constant-power charging phases, and controls alternation of the constant-power charging phases and the constant-voltage charging phases.
3. The charge control method of claim 2, wherein said determining the first of said constant power charging phases of said charging process based on said charging strategy and a current voltage of said rechargeable battery prior to the start of said charging process comprises:
comparing the current voltage with a charging voltage set for the constant voltage charging stage in the charging strategy;
determining a selected charging voltage from a plurality of charging voltages, wherein the selected charging voltage is one of the charging voltages which is greater than or equal to the current voltage and is closest to the current voltage;
and determining the previous constant power charging stage of the constant voltage charging stage corresponding to the selected charging voltage as the first constant power charging stage.
4. The charge control method according to claim 2, characterized in that the controlling of the alternation of the constant-power charging phase and the constant-voltage charging phase includes:
when the charging voltage of the ith constant power charging stage is controlled to be the charging voltage set for the ith constant voltage charging stage, ending the ith constant power charging stage;
when the charging power of the ith constant voltage charging stage is controlled to be the charging power set for the (i+1) th constant power charging stage, ending the ith constant voltage charging stage;
when the charging power of the Nth constant voltage charging stage is controlled to be the set lower limit power, ending the charging of the rechargeable battery;
wherein i is an integer greater than 0 and less than N, and N is the number of constant voltage charging stages.
5. The charge control method according to claim 1, wherein the charge strategy is determined by a test result of a charge test of a three-electrode battery including a positive electrode, a negative electrode, and a reference electrode;
wherein the test result comprises: based on each of a plurality of preset constant-power constant-voltage alternating charging strategies, respectively carrying out charging test on the three-electrode battery to obtain a test result;
and the plurality of constant-power constant-voltage alternating charging strategies are determined according to a predetermined charging feasible region, and the charging feasible region is determined according to a lithium separation curve calibrated for the three-stage battery.
6. The charge control method according to claim 5, wherein the lithium-ion curve is obtained by fitting the obtained plurality of sets of test powers and charging times; and the test power and the charging time are obtained by performing charging test on the three-electrode battery according to the set multiple powers.
7. The method of claim 5, wherein the three-electrode cell is fabricated using the same positive and negative electrode materials as the rechargeable cell and electrode materials used as the reference electrode in an environment having a dew point below-40 ℃.
8. The method of any of claims 1-7, wherein the charging power of the constant power charging phase of the charging strategy is represented using E-rate; wherein the E-rate is a power value required when discharging its rated energy within a preset time.
9. A rechargeable battery charging device, the device comprising: the device comprises a response unit, a loading unit and a control unit;
the response unit is used for responding to the connection of the rechargeable battery and the charging power supply;
the loading unit is used for loading a pre-configured charging strategy when the response unit responds to the connection of the rechargeable battery and the charging power supply;
the control unit is used for controlling the charging process of the rechargeable battery by the charging power supply according to the charging strategy loaded by the loading unit; wherein the charging strategy is set such that the charging process comprises continuously alternating constant power charging phases and constant voltage charging phases; and the charging process starts with the constant power charging phase and ends with the constant voltage charging phase.
10. An electronic device for being packaged in a rechargeable battery module, and comprising a processor that performs the method of any of claims 1-8.
11. A rechargeable battery module comprising a bare cell, and the electronic device of claim 10, wherein the electronic device and the bare cell are integrally packaged.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method of any of claims 1-8.
13. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any of claims 1-8.
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| CN202111394129.1A CN116154882A (en) | 2021-11-23 | 2021-11-23 | Rechargeable battery charging control method, device and charging module |
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| CN202111394129.1A CN116154882A (en) | 2021-11-23 | 2021-11-23 | Rechargeable battery charging control method, device and charging module |
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