CN117411132A - Battery charging method, device, electronic apparatus, medium and program product - Google Patents
Battery charging method, device, electronic apparatus, medium and program product Download PDFInfo
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- CN117411132A CN117411132A CN202311376363.0A CN202311376363A CN117411132A CN 117411132 A CN117411132 A CN 117411132A CN 202311376363 A CN202311376363 A CN 202311376363A CN 117411132 A CN117411132 A CN 117411132A
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- 238000007600 charging Methods 0.000 title claims abstract description 150
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000005070 sampling Methods 0.000 claims abstract description 61
- 238000010277 constant-current charging Methods 0.000 claims abstract description 40
- 238000004590 computer program Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 abstract description 7
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 9
- 238000010280 constant potential charging Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000010278 pulse charging Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011856 silicon-based particle Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
-
- 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
Abstract
The invention discloses a battery charging method, a device, electronic equipment, a medium and a program product, and relates to the technical field of power supply energy storage. The battery charging method comprises the following steps: constant-current charging is carried out on the initial battery according to the preset charging current and the first preset duration; standing the initial battery subjected to constant current charging according to a second preset time length to obtain a primary rechargeable battery; comparing the acquired sampling voltage with a preset voltage to obtain a voltage comparison result; performing constant-voltage current-limiting charging on the primary rechargeable battery according to the voltage comparison result and a first preset time length; standing the primary rechargeable battery subjected to constant-voltage current-limiting charging according to a second preset time length; and comparing the acquired sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to an obtained current comparison result. The battery charging method provided by the embodiment of the invention can improve the problem of volume change of the battery pole piece on the premise of not influencing the battery endurance experience.
Description
Technical Field
The present invention relates to the field of power energy storage technologies, and in particular, to a battery charging method, a device, an electronic apparatus, a medium, and a program product.
Background
At present, in the process of charge-discharge cycle of a silicon-based negative electrode lithium ion battery, a battery pole piece can be obviously expanded in volume, so that a binder and silicon particles in the battery are subjected to fatigue failure, and the charge-discharge cycle performance of the battery is poor and the service life of the battery is shortened.
In the related art, in order to solve the problem that the volume of the battery pole piece is obviously changed in the process of the charge-discharge cycle, a mode of increasing the discharge cut-off voltage or reducing the charge cut-off voltage is adopted, however, the mode can influence the endurance experience of the battery. Therefore, how to provide a battery charging method to improve the problem of volume change of the battery pole piece on the premise of not affecting the battery endurance experience is a technical problem to be solved.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a battery charging method which can improve the problem of volume change of a battery pole piece on the premise of not influencing the battery endurance experience.
The invention also provides a battery charging device, an electronic device applying the battery charging method, a computer readable storage medium applying the battery charging method and a computer program product applying the battery charging method.
A battery charging method according to an embodiment of the first aspect of the present invention includes:
constant-current charging is carried out on the initial battery according to the preset charging current and the first preset duration;
standing the initial battery subjected to constant current charging according to a second preset time length to obtain a primary rechargeable battery, and obtaining a sampling voltage of the primary rechargeable battery;
comparing the sampling voltage with a preset voltage to obtain a voltage comparison result;
performing constant-voltage current-limiting charging on the primary rechargeable battery according to the voltage comparison result and the first preset duration;
performing standing operation on the primary rechargeable battery after constant-voltage current-limiting charging according to the second preset time length, and obtaining sampling current of the primary rechargeable battery;
and comparing the sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to an obtained current comparison result.
The battery charging method according to the embodiment of the invention has at least the following beneficial effects: firstly, constant-current charging is conducted on an initial battery through preset charging current and a first preset duration, and the initial battery after constant-current charging is conducted on the initial battery according to a second preset duration, so that a primary charging battery is obtained. Comparing the obtained sampling voltage of the primary rechargeable battery with a preset voltage, and carrying out constant-voltage current-limiting charging on the primary rechargeable battery according to the obtained voltage comparison result and a first preset time length. And then, carrying out standing operation on the primary rechargeable battery subjected to constant-voltage current-limiting charging according to a second preset time length, and obtaining the sampling current of the primary rechargeable battery after the standing operation is completed. And finally, comparing the sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to an obtained current comparison result. According to the battery charging method, the battery is sequentially subjected to constant-current charging and constant-voltage current limiting charging through the preset charging duration and the preset standing duration, so that the problem of volume change of the battery pole piece is solved on the premise that the battery endurance experience is not affected.
According to some embodiments of the invention, the constant voltage current limiting charging of the primary rechargeable battery according to the voltage comparison result and the first preset duration includes:
if the voltage comparison result indicates that the sampling voltage is greater than or equal to the preset voltage, constant-voltage current-limiting charging is conducted on the primary rechargeable battery according to the first preset duration;
and if the voltage comparison result indicates that the sampling voltage is smaller than the preset voltage, carrying out constant-current charging on the primary rechargeable battery again according to the preset charging current and the first preset duration until the voltage comparison result indicates that the sampling voltage is larger than or equal to the preset voltage.
According to some embodiments of the invention, the determining the primary rechargeable battery as the target battery according to the obtained current comparison result includes:
if the current comparison result shows that the sampling current is smaller than or equal to the preset cut-off current, the primary rechargeable battery is used as the target battery;
and if the current comparison result indicates that the sampling current is larger than the preset cut-off current, executing the constant-voltage current-limiting charging on the primary rechargeable battery again until the current comparison result indicates that the sampling current is smaller than or equal to the preset cut-off current.
According to some embodiments of the present invention, a sum of the first preset duration and the second preset duration is used as a target pulse step length, and the value of the target pulse step length ranges from 3 seconds to 60 seconds.
According to some embodiments of the invention, a ratio of the second preset time period to the target pulse step size is taken as a rest duty cycle, wherein the rest duty cycle is more than 0% and less than 30%.
A battery charging device according to an embodiment of a second aspect of the present invention includes:
the constant-current charging module is used for carrying out constant-current charging on the initial battery according to preset charging current and first preset duration;
the first standing module is used for carrying out standing operation on the initial battery after constant current charging according to a second preset time length to obtain a primary rechargeable battery, and acquiring a sampling voltage of the primary rechargeable battery;
the voltage comparison module is used for comparing the sampling voltage with a preset voltage to obtain a voltage comparison result;
the constant-voltage current-limiting charging module is used for carrying out constant-voltage current-limiting charging on the primary rechargeable battery according to the voltage comparison result and the first preset duration;
the second standing module is used for carrying out standing operation on the primary rechargeable battery after constant-voltage current-limiting charging according to the second preset time length, and obtaining the sampling current of the primary rechargeable battery;
and the current comparison module is used for comparing the sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to an obtained current comparison result.
The battery charging device provided by the embodiment of the invention has at least the following beneficial effects: the battery charging device corresponds to the battery charging method of the embodiment of the first aspect, and can improve the problem of volume change of the battery pole piece on the premise of not affecting the battery endurance experience.
An electronic device according to an embodiment of a third aspect of the present invention includes:
at least one memory;
at least one processor;
at least one computing program;
the computing program is stored in the memory, and the processor executes the at least one computing program to implement the battery charging method of the embodiment of the first aspect described above.
A computer readable storage medium according to an embodiment of a fourth aspect of the present invention includes:
the computer-readable storage medium stores computer-executable instructions for causing a computer to perform the battery charging method of the embodiment of the first aspect described above.
A computer program product according to an embodiment of a fifth aspect of the present invention comprises a computer program, which is read and executed by a processor of a computer device, causing the computer device to perform the battery charging method of the embodiment of the first aspect described above.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block flow diagram of a battery charging method according to an embodiment of the present invention;
FIG. 2 is a block flow diagram of a specific method of step S140 in FIG. 1;
FIG. 3 is a flowchart of a specific method of step S160 in FIG. 1;
fig. 4 is a block diagram of a battery charging device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Reference numerals:
the constant current charging module 110, the first standing module 120, the voltage comparison module 130, the constant voltage current limiting charging module 140, the second standing module 150, the current comparison module 160, the processor 210, the memory 220, the input/output interface 230, the communication interface 240, and the bus 250.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.
At present, in the process of charge-discharge cycle of a silicon-based negative electrode lithium ion battery, a battery pole piece can be obviously expanded in volume, so that a binder and silicon particles in the battery are subjected to fatigue failure, and the charge-discharge cycle performance of the battery is poor and the service life of the battery is shortened.
In the related art, in order to solve the problem that the volume of the battery pole piece is obviously changed in the process of the charge-discharge cycle, a mode of increasing the discharge cut-off voltage or reducing the charge cut-off voltage is adopted, however, the mode can influence the endurance experience of the battery. Therefore, how to provide a battery charging method to improve the problem of volume change of the battery pole piece on the premise of not affecting the battery endurance experience is a technical problem to be solved.
In the following examples, a silicon-based negative electrode lithium ion battery is exemplified as a battery. It can be understood that, for other types of batteries in which the volume of the pole piece is obviously changed during the charging process, the method can be applied to the battery charging method according to the embodiment of the invention, and therefore, the method also belongs to the protection scope of the embodiment of the invention.
As shown in fig. 1, an embodiment of the present invention provides a battery charging method including, but not limited to, steps S110 to S160, which are described in detail below.
Step S110: constant-current charging is carried out on the initial battery according to the preset charging current and the first preset duration;
step S120: standing the initial battery subjected to constant current charging according to a second preset duration to obtain a primary rechargeable battery, and obtaining a sampling voltage of the primary rechargeable battery;
step S130: comparing the sampling voltage with a preset voltage to obtain a voltage comparison result;
step S140: performing constant-voltage current-limiting charging on the primary rechargeable battery according to the voltage comparison result and a first preset time length;
step S150: standing the primary rechargeable battery subjected to constant-voltage current-limiting charging according to a second preset time length, and obtaining the sampling current of the primary rechargeable battery;
step S160: and comparing the sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to the obtained current comparison result.
According to the battery charging method provided by the embodiment of the invention, the constant-current charging and the constant-voltage current limiting charging are sequentially carried out on the battery through the preset charging duration and the preset standing duration, so that the problem of improving the volume change of the battery pole piece on the premise of not affecting the battery endurance experience is solved.
In step S110 of some embodiments, the initial battery is a battery to be subjected to a charging operation, and the first preset duration is a duration of the charging operation. In this embodiment and the following embodiments, the charging operation or the rest operation may be realized by applying a signal to the battery in the form of a signal pulse. And carrying out constant-current charging on the initial battery with preset charging current, and continuously carrying out first preset time. And (3) completing the quick charge of the initial battery by constant current charge for a first preset time period.
In step S120 of some embodiments, the second preset time period is a time period during which the standing operation is performed. And stopping constant current charging of the initial battery after the first duration time, and starting standing operation of the initial battery for a second preset duration time. After the standing operation is completed, a primary rechargeable battery is obtained, and meanwhile, sampling voltage of the primary rechargeable battery is collected.
In some embodiments of the present invention, the sum of the first preset duration and the second preset duration is used as a target pulse step length, and the value range of the target pulse step length is 3 seconds to 60 seconds. Because the first preset duration is the duration of the charging operation and the second preset duration is the duration of the standing operation, the sum of the signal pulse duration provided for the charging operation and the signal pulse duration provided for the standing operation is the target pulse duration for representing the duration of one charging and standing cycle.
In some embodiments of the invention, the proportion of the second preset time period to the target pulse step size is taken as a rest duty cycle, and the rest duty cycle is greater than 0% and less than 30%. Meanwhile, the proportion of the first preset duration to the target pulse step length is taken as the charging duty ratio, namely the charging duty ratio takes a value smaller than 100% and larger than 70%.
In step S130 of some embodiments, the obtained sampling voltage is compared with a preset voltage, so as to determine whether the voltage of the primary rechargeable battery reaches the preset voltage, thereby obtaining a voltage comparison result.
In step S140 of some embodiments, after the voltage comparison result is obtained, it is determined whether to perform constant voltage current limiting charging on the primary rechargeable battery according to the magnitude relation between the sampled voltage and the preset voltage. Step S140 is described in detail below.
As shown in fig. 2, in some embodiments of the present invention, step S140 includes, but is not limited to, step S210 and step S220, which are described in detail below.
Step S210: if the voltage comparison result shows that the sampling voltage is greater than or equal to the preset voltage, carrying out constant-voltage current-limiting charging on the primary rechargeable battery according to the first preset duration;
step S220: and if the voltage comparison result indicates that the sampling voltage is smaller than the preset voltage, carrying out constant current charging on the primary rechargeable battery again according to the preset charging current and the first preset duration until the voltage comparison result indicates that the sampling voltage is larger than or equal to the preset voltage.
In step S210 of some embodiments, when the voltage comparison result indicates that the sampled voltage is greater than or equal to the preset voltage, it indicates that the voltage of the primary rechargeable battery has reached the preset voltage. At this time, the voltage of the current primary rechargeable battery is maintained to perform constant voltage current limiting charging for a first preset period of time on the primary rechargeable battery. When the primary rechargeable battery is charged with constant voltage and current limiting, the current charging current is required to be ensured to be smaller than the preset charging current.
In step S220 of some embodiments, when the voltage comparison result indicates that the sampled voltage is less than the preset voltage, it indicates that the voltage of the primary rechargeable battery has not reached the preset voltage. At this time, referring to the above steps S110 to S130, constant current charging is performed on the initial battery for a first preset period of time again with a preset charging current, then a standing operation is performed on the initial battery after constant current charging again for a second preset period of time, and a sampling voltage of the initial battery after the standing operation is obtained, so as to obtain a voltage comparison result reflecting a relationship between the sampling voltage and the preset voltage. If the obtained voltage comparison result is still that the sampling voltage is smaller than the preset voltage, executing the cycle again; if the voltage comparison result obtained again is that the sampling voltage is greater than or equal to the preset voltage, the operation of step S210 is performed.
In step S150 of some embodiments, constant voltage current-limiting charging of the primary rechargeable battery is stopped after the lapse of the first duration, and the stationary operation of the primary rechargeable battery is started for the second preset duration. After the standing operation is completed, a primary rechargeable battery is obtained, and meanwhile, sampling current of the primary rechargeable battery is collected.
In step S160 of some embodiments, the target battery is a primary rechargeable battery that completes the charging operation. Comparing the obtained sampling current with a preset cutoff current to judge whether the current of the primary rechargeable battery reaches the preset cutoff current or not, thereby obtaining a current comparison result. After the current comparison result is obtained, determining whether the primary rechargeable battery is charged or not according to the magnitude relation between the sampling current and the preset cut-off current. Step S160 will be described in detail below.
As shown in fig. 3, in some embodiments of the present invention, step S160 includes, but is not limited to, step S310 and step S320, which are described in detail below.
Step S310: if the current comparison result shows that the sampling current is smaller than or equal to the preset cut-off current, taking the primary rechargeable battery as a target battery;
step S320: and if the current comparison result shows that the sampling current is larger than the preset cut-off current, executing constant-voltage current-limiting charging on the primary rechargeable battery again until the current comparison result shows that the sampling current is smaller than or equal to the preset cut-off current.
In step S310 of some embodiments, when the current comparison result indicates that the sampling current is less than or equal to the preset off-current, it indicates that the primary rechargeable battery has been charged. At this time, the primary rechargeable battery is taken as the target battery.
In step S320 of some embodiments, when the current comparison result indicates that the sampling current is greater than the preset cutoff current, it indicates that the primary charging battery has not completed charging. At this time, referring to step S140 and step S150, the primary rechargeable battery is charged with constant voltage and current limitation for a first preset period of time again, then the primary rechargeable battery after the secondary constant voltage and current limitation charging is subjected to a standing operation for a second preset period of time again, and a sampling current of the primary rechargeable battery after the standing operation is obtained, so as to obtain a current comparison result reflecting the magnitude relation between the sampling current and a preset cut-off current. If the obtained current comparison result is still that the sampling current is larger than the preset cut-off current, executing the cycle again; if the current comparison result obtained again is that the sampling current is less than or equal to the preset off-current, the operation of step S310 is performed.
In a specific embodiment, a lithium ion battery with a normal temperature multiplying power window of 4C, a capacity of 4960mAh, a positive electrode main material of Lithium Cobalt Oxide (LCO), a negative electrode main material of 95% graphite and 5% silicon carbon is selected, and a charging and discharging experiment is carried out in an incubator at 45+/-2 ℃, so that the effect difference between the battery charging method of the related art and the battery charging method of the invention is compared. The experimental details are described in detail below.
All experimental batteries are subjected to charge-discharge circulation in an incubator at 45+/-2 ℃, the batteries are taken out every 100 times in the process of charge-discharge circulation so as to measure the thickness of the batteries in a full-charge state, and the thickness of the full-charge batteries after the circulation and the thickness of the full-charge batteries before the circulation start are compared. During the cyclic test, the discharge mode is that the battery is left to stand for 5min after the battery is fully charged, and then the battery is discharged to 3.2V at a constant current of 0.7C (the unit C refers to the current of the battery capacity multiple, for example, the unit C refers to the current of 1 time of the battery capacity).
The charging method of the related art specifically includes: in the first step, constant current charging is carried out, and 3.6C current is used for constant current charging until the voltage is more than or equal to 4.27V.
And secondly, constant-current and constant-voltage charging, namely, charging to 4.35V at a constant current of 2.8C, and then charging to a constant voltage until the cut-off current is less than or equal to 1.8C.
And thirdly, constant-current and constant-voltage charging, namely, charging to 4.40V at a constant current of 1.8C, and then charging to a constant voltage until the cut-off current is less than or equal to 1.5C.
And fourthly, constant-current and constant-voltage charging, namely, charging to 4.50V at a constant current of 1.5C, and then charging to a constant voltage until the cut-off current is less than or equal to 1.2C.
And fifthly, constant-current and constant-voltage charging, namely, charging to 4.55V at a constant current of 1.2C, and then charging to a constant voltage until the cut-off current is less than or equal to 0.28C.
The charging mode of the invention specifically comprises the following steps: firstly, constant current pulse charging is carried out, the constant current charging is carried out for 30s by 4.2C current, then the charging is stopped for 5s, and the cycle is carried out until the voltage is more than or equal to 4.27V. And secondly, constant current pulse charging, namely, constant current charging for 30s at 3.27C, and then stopping charging for 5s, and circulating until the voltage is more than or equal to 4.35V. And thirdly, constant voltage current limiting pulse charging, namely, carrying out constant voltage charging for 30s at the voltage of 4.35V on the battery with the current not more than 3.27C, stopping charging for 5s, and circulating to the cut-off current not more than 2.1C. Fourth, constant current pulse charging is carried out, the constant current charging is carried out for 30s by using 2.1C current, then the charging is stopped for 5s, and the cycle is carried out until the voltage is more than or equal to 4.40V. And fifthly, constant-voltage current-limiting pulse charging, namely, carrying out constant-voltage charging for 30s at 4.40V on the battery with a current not more than 2.1C, stopping charging for 5s, and circulating to a cut-off current not more than 1.75C. And sixthly, constant-current and constant-voltage charging, namely, charging to 4.50V at a constant current of 1.5C, and then charging to a constant voltage until the cut-off current is less than or equal to 1.2C. And seventhly, constant-current and constant-voltage charging, namely, charging to 4.55V at a constant current of 1.2C, and then charging to a constant voltage until the cut-off current is less than or equal to 0.28C.
Two parallel samples are respectively arranged for the charge and discharge test of the related art and the charge and discharge test of the present invention. The charge duration and charge capacity ratio of the two methods are shown in table 1 below. Wherein, the charging capacity ratio=actual charging capacity/small-magnification standard charging capacity, the small-magnification standard charging mode is: the charge was constant current charged to 4.50V at 0.2C, and thereafter constant voltage charged to 0.05C.
Table 1:
as can be seen from Table 1, the charging duration of the two methods is not obviously different, the quick charging experience of the battery is not affected, and meanwhile, the charging capacity ratio of the invention is not lower than that of the related art, so that the endurance experience of the battery is not affected.
The thickness increase rates for both methods are shown in table 2 below. Wherein the thickness increase rate= (full electrical thickness after cycle-full electrical thickness before cycle)/full electrical thickness before cycle.
Table 2:
as can be seen from table 2, the thickness growth rate of the present invention is lower than that of the related art, and the larger the difference between the thickness growth rate of the present invention and that of the related art is as the number of charge and discharge cycles increases. It can be seen that the battery charging method of the present invention significantly improves the thickness of the battery charge-discharge cycle.
The capacity fade rates for both methods are shown in table 3 below. Here, the capacity fade rate= (pre-cycle capacity-post-cycle capacity)/pre-cycle capacity.
Table 3:
as can be seen from table 3, the capacity reduction rate of the present invention is lower than that of the related art, and the larger the difference between the capacity reduction rate of the present invention and that of the related art is as the number of charge and discharge cycles increases. It can be seen that the battery charging method of the present invention significantly improves the capacity fade of the battery during the charge-discharge cycle.
As shown in fig. 4, an embodiment of the present invention further provides a battery charging apparatus, including:
the constant current charging module 110 is configured to perform constant current charging on the initial battery according to a preset charging current and a first preset duration;
the first standing module 120 is configured to perform a standing operation on the initial battery after constant current charging according to a second preset duration, obtain a primary rechargeable battery, and obtain a sampling voltage of the primary rechargeable battery;
the voltage comparison module 130 is configured to compare the sampled voltage with a preset voltage to obtain a voltage comparison result;
the constant voltage current limiting charging module 140 is configured to perform constant voltage current limiting charging on the primary rechargeable battery according to the voltage comparison result and the first preset duration;
the second standing module 150 is configured to perform a standing operation on the primary rechargeable battery after the constant voltage current limiting charging according to a second preset duration, and obtain a sampling current of the primary rechargeable battery;
the current comparison module 160 is configured to compare the sampling current with a preset cutoff current, and use the primary rechargeable battery as the target battery according to the obtained current comparison result.
Therefore, the content in the above battery charging method embodiment is applicable to the embodiment of the present battery charging device, and the functions specifically implemented by the embodiment of the present battery charging device are the same as those of the above battery charging method embodiment, and the beneficial effects achieved by the embodiment of the present battery charging method are the same as those achieved by the above battery charging method embodiment.
An electronic device according to an embodiment of the present invention is described in detail below with reference to fig. 5.
As shown in fig. 5, fig. 5 illustrates a hardware structure of an electronic device according to another embodiment, the electronic device includes:
the processor 210 may be implemented by a general-purpose central processing unit (Central Processing Unit, CPU), a microprocessor, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc., for executing related programs to implement the technical solutions provided by the embodiments of the present disclosure;
the Memory 220 may be implemented in the form of a Read Only Memory (ROM), a static storage device, a dynamic storage device, or a random access Memory (Random Access Memory, RAM). Memory 220 may store an operating system and other application programs, and when the technical solutions provided by the embodiments of the present disclosure are implemented by software or firmware, relevant program codes are stored in memory 220 and invoked by processor 210 to perform the battery charging method of the embodiments of the present disclosure;
an input/output interface 230 for implementing information input and output;
the communication interface 240 is configured to implement communication interaction between the present device and other devices, and may implement communication in a wired manner (e.g. USB, network cable, etc.), or may implement communication in a wireless manner (e.g. mobile network, WIFI, bluetooth, etc.);
bus 250 transfers information between the various components of the device (e.g., processor 210, memory 220, input/output interface 230, and communication interface 240);
wherein processor 210, memory 220, input/output interface 230, and communication interface 240 are communicatively coupled to each other within the device via bus 250.
Embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform a battery charging method as described in any of the above embodiments.
It can be seen that the foregoing embodiments of the battery charging method are applicable to the embodiments of the computer-readable storage medium, and the functions of the embodiments of the computer-readable storage medium are the same as those of the embodiments of the battery charging method, and the beneficial effects achieved by the embodiments of the battery charging method are the same as those achieved by the embodiments of the battery charging method.
Embodiments of the present invention also provide a computer program product comprising a computer program that is read and executed by a processor of a computer device to cause the computer device to perform a battery charging method as described in any of the embodiments above.
It can be seen that the foregoing embodiments of the battery charging method are applicable to the embodiments of the computer program product, and the functions of the embodiments of the computer program product are the same as those of the embodiments of the battery charging method, and the advantages achieved by the embodiments of the battery charging method are the same as those achieved by the embodiments of the battery charging method.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. 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 appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
The terms "first," "second," "third," "fourth," and the like in the description of the invention and in the above figures, 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 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.
It should be understood that in the present invention, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or 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 an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network 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 in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including multiple instructions for causing an electronic device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of 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 (Random Access Memory, RAM), a magnetic disk, an optical disk, or other various media capable of storing a program.
Preferred embodiments of the disclosed embodiments are described above with reference to the accompanying drawings, and thus do not limit the scope of the claims of the disclosed embodiments. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present disclosure shall fall within the scope of the claims of the embodiments of the present disclosure.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A battery charging method, comprising:
constant-current charging is carried out on the initial battery according to the preset charging current and the first preset duration;
standing the initial battery subjected to constant current charging according to a second preset time length to obtain a primary rechargeable battery, and obtaining a sampling voltage of the primary rechargeable battery;
comparing the sampling voltage with a preset voltage to obtain a voltage comparison result;
performing constant-voltage current-limiting charging on the primary rechargeable battery according to the voltage comparison result and the first preset duration;
performing standing operation on the primary rechargeable battery after constant-voltage current-limiting charging according to the second preset time length, and obtaining sampling current of the primary rechargeable battery;
and comparing the sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to an obtained current comparison result.
2. The battery charging method according to claim 1, wherein the constant voltage current-limiting charging of the primary rechargeable battery according to the voltage comparison result and the first preset time period includes:
if the voltage comparison result indicates that the sampling voltage is greater than or equal to the preset voltage, constant-voltage current-limiting charging is conducted on the primary rechargeable battery according to the first preset duration;
and if the voltage comparison result indicates that the sampling voltage is smaller than the preset voltage, carrying out constant-current charging on the primary rechargeable battery again according to the preset charging current and the first preset duration until the voltage comparison result indicates that the sampling voltage is larger than or equal to the preset voltage.
3. The battery charging method according to claim 1, wherein said taking the preliminary rechargeable battery as a target battery according to the obtained current comparison result comprises:
if the current comparison result shows that the sampling current is smaller than or equal to the preset cut-off current, the primary rechargeable battery is used as the target battery;
and if the current comparison result indicates that the sampling current is larger than the preset cut-off current, executing the constant-voltage current-limiting charging on the primary rechargeable battery again until the current comparison result indicates that the sampling current is smaller than or equal to the preset cut-off current.
4. A battery charging method according to any one of claims 1 to 3, wherein the sum of the first preset time period and the second preset time period is taken as a target pulse step length, and the value of the target pulse step length ranges from 3 seconds to 60 seconds.
5. The battery charging method according to claim 4, characterized in that a proportion of the second preset time period to the target pulse step length is taken as a rest duty ratio, the rest duty ratio being greater than 0% and less than 30%.
6. A battery charging apparatus, comprising:
the constant-current charging module is used for carrying out constant-current charging on the initial battery according to preset charging current and first preset duration;
the first standing module is used for carrying out standing operation on the initial battery after constant current charging according to a second preset time length to obtain a primary rechargeable battery, and acquiring a sampling voltage of the primary rechargeable battery;
the voltage comparison module is used for comparing the sampling voltage with a preset voltage to obtain a voltage comparison result;
the constant-voltage current-limiting charging module is used for carrying out constant-voltage current-limiting charging on the primary rechargeable battery according to the voltage comparison result and the first preset duration;
the second standing module is used for carrying out standing operation on the primary rechargeable battery after constant-voltage current-limiting charging according to the second preset time length, and obtaining the sampling current of the primary rechargeable battery;
and the current comparison module is used for comparing the sampling current with a preset cut-off current, and taking the primary rechargeable battery as a target battery according to an obtained current comparison result.
7. An electronic device, comprising:
at least one memory;
at least one processor;
at least one computer program;
the computer program is stored in the memory, and a processor executes the at least one computer program to implement the battery charging method according to any one of claims 1 to 5.
8. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the battery charging method according to any one of claims 1 to 5.
9. Computer program product, characterized in that it comprises a computer program, which is read and executed by a processor of a computer device, so that the computer device performs the battery charging method according to any of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311376363.0A CN117411132A (en) | 2023-10-23 | 2023-10-23 | Battery charging method, device, electronic apparatus, medium and program product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311376363.0A CN117411132A (en) | 2023-10-23 | 2023-10-23 | Battery charging method, device, electronic apparatus, medium and program product |
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| CN117411132A true CN117411132A (en) | 2024-01-16 |
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| CN202311376363.0A Pending CN117411132A (en) | 2023-10-23 | 2023-10-23 | Battery charging method, device, electronic apparatus, medium and program product |
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| CN (1) | CN117411132A (en) |
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