CN111146837A - Charging method and device, electronic device and storage medium - Google Patents
Charging method and device, electronic device and storage medium Download PDFInfo
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- 238000010280 constant potential charging Methods 0.000 claims description 12
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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
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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
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Abstract
The disclosure relates to a charging method and device, an electronic device and a storage medium, wherein the charging method comprises the following steps: in the charging process, acquiring the open-circuit voltage of the battery; and when the open-circuit voltage of the battery reaches a preset threshold value, switching the charging mode of the battery, wherein the preset threshold value is a critical open-circuit voltage value when the charging mode of the battery is switched. The problem of because the ageing internal resistance of battery that leads to of battery increases, the floating pressure that the internal resistance produced increases for current charging mode stops when effective charging voltage does not reach the default, and then makes the battery not enough to charge under current charging mode is solved, the speed of battery charging after having improved ageing, reduces the influence of battery ageing to the speed of charging.
Description
Technical Field
The present disclosure relates to the field of charging technologies, and in particular, to a charging method and apparatus, an electronic device, and a storage medium.
Background
With the development and progress of the technology, people have higher and higher requirements on the charging speed of electronic equipment. To meet this demand, the application of the rapid charging method is becoming more and more widespread. One common fast charging method is to charge the battery to a cut-off voltage in a first charging mode, and then switch to a second charging mode to continue charging.
However, as the internal resistance of the battery increases with the aging of the battery, and further, the floating voltage generated by the internal resistance of the battery increases, when the charging voltage of the battery reaches the cut-off voltage in the first charging mode, the first charging mode is cut off when the effective voltage does not reach the preset value due to the internal resistance voltage division. The battery is not charged enough in the first charging mode, and the overall charging speed of the battery is further influenced.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The disclosure aims to provide a charging method and device, an electronic device and a storage medium, so as to solve the problem of slow charging speed caused by the fact that effective voltage in a charging process cannot reach a preset value after a battery is aged at least to a certain extent.
According to a first aspect of the present disclosure, there is provided a charging method including:
in the charging process, acquiring the open-circuit voltage of the battery;
and when the open-circuit voltage of the battery reaches a preset threshold value, switching the charging mode of the battery, wherein the preset threshold value is a critical open-circuit voltage value when the charging mode of the battery is switched.
According to a second aspect of the present disclosure, a charging device includes:
the open-circuit voltage acquisition module is used for acquiring the open-circuit voltage of the battery in the charging process;
the charging mode switching module is used for switching the charging mode of the battery when the open-circuit voltage of the battery reaches a preset threshold value, and the preset threshold value is a critical open-circuit voltage value when the charging mode of the battery is switched.
According to a third aspect of the present disclosure, there is provided an electronic device comprising
A processor; and
a memory having computer readable instructions stored thereon which, when executed by the processor, implement a method according to any of the above.
According to a fourth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method according to any one of the above.
According to the charging method provided by the embodiment of the disclosure, the open-circuit voltage of the battery is obtained in the charging process, and when the open-circuit voltage of the battery reaches the preset threshold value, the charging mode of the battery is switched, so that the problem that the current charging mode stops when the effective charging voltage does not reach the preset value due to the increase of the floating voltage generated by the internal resistance of the battery caused by the aging of the battery is solved, the battery is insufficiently charged in the current charging mode, the charging speed of the aged battery is increased, and the influence of the aging of the battery on the charging speed is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic diagram of a first charging method provided in the related art;
fig. 2 is a schematic diagram of a second charging method provided in the related art;
fig. 3 is a schematic diagram of a third charging method provided in the related art;
fig. 4 is a flowchart of a first charging method provided in the embodiment of the present disclosure;
fig. 5 is a flowchart of a second charging method provided by the embodiment of the disclosure;
fig. 6 is a flowchart of a third charging method provided by the embodiment of the disclosure;
fig. 7 is a flowchart of a fourth charging method provided by the embodiment of the disclosure;
fig. 8 is a schematic block diagram of a charging device provided in an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a first electronic device provided in an exemplary embodiment of the disclosure;
fig. 10 is a schematic diagram of a first computer-readable storage medium according to an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in the form of software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
In the related art, a charging method is provided, and the charging method includes a plurality of charging modes, in two adjacent charging modes, a battery is charged to a predetermined voltage through a previous charging mode, and when the battery voltage reaches the predetermined voltage, the charging mode of the battery is switched to a subsequent charging mode.
For example, as shown in fig. 1, the charging method provided by the related art includes a constant current charging mode TI and a constant voltage charging mode TU. In the constant current charging mode, the battery is charged to a cut-off voltage U by a constant current I, and after the voltage of the battery reaches the cut-off voltage U, the battery is charged with a constant voltage by taking the cut-off voltage U as a charging voltage until the charging current is smaller than a cut-off current value, and the charging is finished. For example, the battery is charged to a cut-off voltage of, for example, 4.2V at a current of 1C (i.e., a current twice as large as the battery capacity, assuming that the battery capacity is 3000mAh, the current is 3A), and then charged at a constant voltage of 4.2V until the current is reduced to a cut-off current of, for example, 0.02C (i.e., a 3000mAh battery, the cut-off current is 60 mA).
Alternatively, as shown in fig. 2, the charging method provided in the related art is a step current charging method, in which the battery is charged to a cut-off voltage by a first current, then the battery is charged to the cut-off voltage by switching to a second current, then the battery is charged by switching to a third current, and so on until the charging current is switched to a preset current. In the charging sequence, the charging current gradually decreases, that is, the first charging current > the second charging current > the third charging current.
Alternatively, as shown in fig. 3, the charging method provided in the related art is a charging method combining a step charging method and a constant voltage charging method. In the step charging stage, the charging mode is similar to that shown in fig. 1, and after several times of step charging TI, the constant voltage charging mode TU is switched to until the charging current reaches the cut-off current.
As described above, the charging methods provided in the related art all require switching of the charging mode of the battery after the battery reaches the cut-off voltage. In the life cycle of the battery, as the battery ages, the internal resistance of the battery increases, which causes the floating voltage generated by the internal resistance of the battery to increase, and further causes the effective charging voltage of the battery to decrease, thereby causing the actual charging to be insufficient when the battery reaches the cut-off voltage. In practical applications, the charging speed of the battery before the switching of the charging mode tends to be larger than the charging speed after the switching.
For example, in the charging process, the charging is started at 4A to 4.2V, that is, the charging is shifted to 3A, the internal resistance value of the battery is 30m Ω for a new battery, and the floating voltage generated when the battery is charged at this current is V' 4 × 0.03 to 0.12V, and the open-circuit voltage of the battery is 4.2 to 0.12 to 4.08V, but when the internal resistance value increases to 60m Ω after the battery ages, the floating voltage value becomes 0.24V and the open-circuit voltage value becomes 3.96V, and therefore, the condition for changing to 3A has been reduced from 4.08V to 3.96V, and thus the large-current 4A charging time is shortened, and the small-current 3A charging time is increased (starting from 4.08V to 3.96V). In addition, after the internal resistance of the battery is increased, the floating voltage value generated by large current is larger, so the time shortened by the large current is more, the whole charging time is increased, and the user experience brought by quick charging is not facilitated.
An exemplary embodiment of the present disclosure first provides a charging method, as shown in fig. 4, which may include the steps of:
step S410, in the charging process, acquiring an open-circuit voltage of the battery.
Step S430, when the open-circuit voltage of the battery reaches a preset threshold, switching the charging mode of the battery, where the preset threshold is a critical open-circuit voltage value when the charging mode of the battery is switched.
The preset threshold value to be reached by the open-circuit voltage is the open-circuit voltage of the battery when the battery is charged for the first time and the charging mode is switched. And when the open-circuit voltage of the battery reaches the preset threshold value in each charging process, carrying out mode switching.
According to the charging method provided by the embodiment of the disclosure, the open-circuit voltage of the battery is obtained in the charging process, when the open-circuit voltage of the battery reaches the preset threshold value, the charging mode of the battery is switched, and because the relation between the open-circuit voltage of the battery and the discharging depth is not changed in the battery aging process, the charging method for the embodiment of the disclosure solves the problem that the floating voltage generated by the internal resistance of the aged battery is increased due to the fact that the charging mode of the battery is switched by the charging voltage in the related technology, the current charging mode stops when the effective charging voltage does not reach the preset value, and further the battery is insufficiently charged in the current charging mode, improves the charging speed of the aged battery, and reduces the influence of the aging of the battery on the charging speed.
Further, as shown in fig. 5, the charging method provided in the embodiment of the present disclosure may further include:
step S450, a first mapping relationship is established, where the first mapping relationship includes a mapping relationship between the open-circuit voltage and the depth of discharge of the battery.
For the determined battery core, the corresponding relation between the open-circuit voltage and the discharge depth is fixed in the life cycle of the battery, so that the corresponding relation between the open-circuit voltage and the discharge depth can be obtained through testing in the testing stage.
The following will describe in detail the steps of the charging method provided by the embodiment of the present disclosure:
in step S450, a first mapping relationship may be established, the first mapping relationship including a mapping relationship of a battery open-circuit voltage and a depth of discharge.
In a possible embodiment, establishing the first mapping relationship may be implemented as follows: charging the battery by using a first preset current value to obtain a battery chemical ID (chemical ID) in the battery charging process; and determining the corresponding relation between the open-circuit voltage and the discharge depth according to the battery chemical ID.
The first preset current value is smaller than the discharging current of the battery during working. In the charging process, the battery is charged through the current of the first preset current, the battery is considered to be in a stable state, and the voltage of the battery during charging is the open-circuit voltage. The charging can be stabilized by the current value of the first preset current, the electric quantity of the battery is charged from 0 to 100% (namely, the depth of discharge is from 100% to 0), and the relationship between the voltage of the battery and the depth of discharge is recorded, so that the first mapping relationship in the charging process is obtained.
The battery chemical ID is a battery chemical identification number, and each battery chemical identification number corresponds to the chemical capacity, an open-circuit voltage curve, an impedance curve and the like of the battery of the corresponding model. The open-circuit voltage curve of the battery can be determined according to the battery chemical ID, and then the corresponding relation between the open-circuit voltage and the discharge depth of the battery is determined.
Alternatively, establishing the first mapping relationship may be implemented as follows: and charging the battery from the initial voltage to the cut-off voltage through the first preset current value to obtain the relation between the voltage and the capacity. And then dividing the electric quantity by the rated capacity value of the battery to obtain the discharge depth of the battery, thereby obtaining a first mapping relation.
The first mapping relationship may be represented in a curve form or a table form, and during use, the first mapping relationship may be stored in the storage device, and the stored first mapping relationship may be called when the battery internal resistance is detected.
In step S410, an open circuit voltage of the battery may be acquired during the charging process.
In a possible embodiment, as shown in fig. 6, step S410 may include the following steps:
in step S610, a first depth of discharge of the battery is obtained, where the first depth of discharge is the depth of discharge of the battery at the beginning of charging.
Step S620, determining a second depth of discharge according to the first depth of discharge and the increment of the battery capacity during the charging process.
Step S630, obtaining the open-circuit voltage of the battery according to the second depth of discharge and the first mapping relation, where the first mapping relation includes a mapping relation between the open-circuit voltage and the depth of discharge.
Further, before step S620, as shown in fig. 7, step S410 may further include:
in step S640, the increment of the battery charge during the charging process is determined.
In step S610, a first depth of discharge of the battery may be obtained, the first depth of discharge being the depth of discharge of the battery at the start of charging.
In a possible embodiment, obtaining the first depth of discharge of the battery may be achieved by: acquiring an initial voltage of the battery to serve as an initial open-circuit voltage; a first depth of discharge is determined based on the initial open circuit voltage and the first mapping.
When the battery is used, the battery is in a balanced state, and the voltages of two poles of the battery are the open-circuit voltage of the battery. The open circuit voltage of the battery can be obtained by detection. After the initial open-circuit voltage of the battery is detected, a first depth of discharge of the battery is determined through the first mapping relation.
In a possible embodiment, obtaining the first depth of discharge of the battery may be achieved by: when the electric quantity change of the battery is smaller than a first threshold value in the charging process of the battery, acquiring the current charging voltage as an open-circuit voltage; and determining a first depth of discharge according to the open-circuit voltage and the first mapping relation.
When the battery is discharged at a low current, the battery is in a stable state, and the discharge voltage of the battery is considered as an open-circuit voltage. For example, the continuous current of the battery is less than 20mA, or dV/dt is less than 5uV/s, and the discharge voltage at the moment can be used as the open-circuit voltage of the battery; or when the electronic device is turned off or in standby, the measured voltage can be used as an open-circuit voltage. This approach can be used to correct for open circuit voltage during battery charging.
After the open circuit voltage is corrected, the discharge depth of the battery can be further corrected. After the corrected open circuit voltage is determined, a corrected first depth of discharge is determined from the first mapping.
In practical applications, the first depth of discharge may also be obtained by other means, for example, the full-charge state and the zero-charge state of the battery are easy to detect, so that the detection of the internal resistance of the battery during the discharging process may be started when the battery is fully charged, and the first depth of discharge is zero. Or when the battery capacity is zero, starting to detect the internal resistance of the battery in the charging process of the battery, wherein the first depth of discharge is 100 percent.
In step S640, an increment of the battery charge during charging may be determined.
In a possible embodiment, step S640 may be implemented as follows: acquiring current in the charging process of the battery, and performing charge integration to obtain the electric quantity variation of the battery; and determining the electric quantity change rate according to the electric quantity change quantity and the rated charge quantity of the battery.
And in the charging process, detecting the charging current in real time, and integrating the charging current to obtain the electric quantity variation delta Q of the battery during charging.
ΔQ＝∫idt
Wherein, Delta Q is the quantity of change of electric quantity, QMAXM is the rate of change of the charge, and t is the charging time.
In step S620, a second depth of discharge may be determined according to the first depth of discharge and the increment of the battery power during the charging process.
Here, the first depth of discharge DOD1 is obtained through step S610, and the rate of change m of the battery power is determined through step S630. During the charging (or discharging) process, the second depth of discharge DOD2 may be calculated by the following formula:
DOD2＝DOD1-m
step S630, obtaining the open-circuit voltage of the battery according to the second depth of discharge and the first mapping relation, where the first mapping relation includes a mapping relation between the open-circuit voltage and the depth of discharge.
The first mapping relation may be stored in the electronic device, and the first mapping relation may be called to determine the first open-circuit voltage when detecting the internal resistance of the battery. For example, when the first mapping relationship is in a table form, the first open-circuit voltage may be obtained by looking up in the table of the first mapping relationship. When the first mapping relation is a function of the open-circuit voltage with respect to the depth of discharge, the second depth of discharge may be substituted into the function f (dod) to calculate the first open-circuit voltage.
In step S430, when the open circuit voltage of the battery reaches a preset threshold, the charging mode of the battery may be switched.
In one possible embodiment, the battery has multiple sequential charging modes. When the open-circuit voltage of the battery reaches a preset threshold, the charging mode of the battery is switched, which can be realized by the following steps: detecting an open circuit voltage of the battery while the battery is charged in the first charging mode; when the open-circuit voltage of the battery reaches a first preset threshold value, the charging mode of the battery is switched to a second charging mode, the first charging mode and the second charging mode are any two adjacent charging modes in the plurality of charging modes, and the first preset threshold value is a switched open-circuit voltage value of the two adjacent charging modes.
Wherein the charging current of the first charging mode and the charging current of the second charging mode are different, or the charging voltage of the first charging mode and the charging voltage of the second charging mode are different. For example, the switching of the charging mode may be switching from a constant current charging mode to a constant voltage mode, switching from a constant voltage mode to a constant current mode, switching from a first charging current to a second charging current.
Illustratively, the first charging mode is a constant current charging mode, and the second charging mode is a constant voltage charging mode. On the basis, when the open-circuit voltage of the battery reaches a preset threshold, the charging mode of the battery is switched, and the method can be realized by the following steps: detecting an open-circuit voltage of the battery while the battery is charged in a constant voltage charging mode; and when the open-circuit voltage of the battery reaches a first preset threshold value, switching the charging mode of the battery into a constant-voltage charging mode.
For example, in the first charging mode, the battery is charged with a current of 1C (i.e., a current twice as large as the battery capacity, assuming that the battery capacity is 3000mAh, the current is 3A) until the open-circuit voltage reaches a predetermined threshold (e.g., the cut-off voltage is 4.2V, the first predetermined threshold may be 4.08V), and then the battery is charged with a charging voltage corresponding to the open-circuit voltage of 4.08V until the current is reduced to the cut-off current, such as 0.02C (i.e., 3000mAh battery, the cut-off current is 60 mA).
Or the battery is charged by a step current method, the first charging mode is a first current charging mode, and the second charging mode is a second current charging mode. On the basis, when the open-circuit voltage of the battery reaches a preset threshold, the charging mode of the battery is switched, and the method can be realized by the following steps: detecting an open circuit voltage of the battery while the battery is charged in the first current charging mode; and when the open-circuit voltage of the battery reaches a first preset threshold value, switching the charging mode of the battery into a second current charging mode. The charging current of the first current charging mode is a first constant current, the charging current of the second current charging mode is a second constant current, and the first constant current is different from the second constant current. For example, the first constant current is greater than the second constant current.
For example, during the charging process, according to the battery state information, the charging current is continuously adjusted, I1 is used for constant current charging to t1, then I2 is used for constant current charging to t2, and I3 is used for constant current charging to t 3. In which the battery is charged with a current exceeding the rated rate in the initial charging phase, assuming that the rated current of the battery is 3C and the current is 3.5C in the initial t1 time, the charging speed can be maximized. And stopping when the open-circuit voltage of the battery reaches a preset value in each constant-current charging stage, and switching to the next constant-current charging current.
Alternatively, the battery may be charged by a step constant current, and then by a constant voltage until the current is cut off. In the process, during the step current switching and the step constant current mode switching to the constant voltage mode charging, each switching can be realized by detecting the open-circuit voltage of the battery, and when the open-circuit voltage reaches the switching threshold value, the charging mode is switched.
Since the more severe the deterioration degree is during the use of the battery, the greater the internal resistance of the battery. In order to prevent the internal resistance of the battery from being too large, and the charging voltage of the battery is larger than the maximum allowable charging voltage when the open-circuit voltage reaches a preset value. The charging voltage of the battery may be detected while charging in the first charging mode, and when the charging voltage of the battery is greater than or equal to the maximum allowable charging voltage of the battery, the detection of the open-circuit voltage may be stopped, and the charging mode of the battery may be switched to the second charging mode.
According to the charging method provided by the embodiment of the disclosure, the open-circuit voltage of the battery is obtained in the charging process, when the open-circuit voltage of the battery reaches the preset threshold value, the charging mode of the battery is switched, and because the relation between the open-circuit voltage of the battery and the discharging depth is not changed in the battery aging process, the charging method for the embodiment of the disclosure solves the problem that the floating voltage generated by the internal resistance of the aged battery is increased due to the fact that the charging mode of the battery is switched by the charging voltage in the related technology, the current charging mode stops when the effective charging voltage does not reach the preset value, and further the battery is insufficiently charged in the current charging mode, improves the charging speed of the aged battery, and reduces the influence of the aging of the battery on the charging speed.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
Further, in the present exemplary embodiment, there is also provided a charging device, as shown in fig. 8, including:
an open-circuit voltage obtaining module 810, configured to obtain an open-circuit voltage of the battery during a charging process;
the charging mode switching module 820 is configured to switch the charging mode of the battery when the open-circuit voltage of the battery reaches a preset threshold, where the preset threshold is a critical open-circuit voltage value when the charging mode of the battery is switched.
The charging device provided by the embodiment of the disclosure, by acquiring the open-circuit voltage of the battery in the charging process, when the open-circuit voltage of the battery reaches the preset threshold value, the charging mode of the battery is switched, so that the problem that the battery is not charged enough in the current charging mode due to the fact that the floating voltage generated by the internal resistance of the battery is increased due to aging of the battery and the current charging mode is stopped when the effective charging voltage does not reach the preset value is solved, the charging speed of the aged battery is increased, and the influence of the aging of the battery on the charging speed is reduced.
Further, the charging device further includes:
the mapping establishing module is used for establishing a first mapping relation, and the first mapping relation comprises a mapping relation between the open-circuit voltage and the discharge depth of the battery.
In one possible embodiment, the open circuit voltage obtaining module includes:
the first acquisition unit is used for acquiring a first depth of discharge of the battery, and the first depth of discharge is the depth of discharge of the battery when charging starts.
And the first determining unit is used for determining the second depth of discharge according to the first depth of discharge and the increment of the battery capacity in the charging process.
And the second obtaining unit is used for obtaining the open-circuit voltage of the battery according to the second depth of discharge and a first mapping relation, wherein the first mapping relation comprises the mapping relation between the open-circuit voltage and the depth of discharge.
And a second determination unit for determining an increase in the battery charge during charging.
In a possible implementation, the first obtaining unit may include:
a first obtaining subunit, configured to obtain an initial voltage of the battery as an initial open-circuit voltage;
and the first determining subunit is used for determining the first depth of discharge according to the initial open-circuit voltage and the first mapping relation.
In a possible embodiment, the second determination unit may include:
the integrating subunit is used for acquiring current in the battery charging process and performing charge integration to obtain the increment of the battery electric quantity;
and the second determining subunit is used for determining the electric quantity change rate according to the increment of the electric quantity and the rated electric charge quantity of the battery, wherein the rated electric charge quantity is the maximum electric charge quantity allowed to be stored by the battery.
In a possible embodiment, the first determining unit may include:
and the third determining subunit is used for performing difference operation on the first depth of discharge and the electric quantity change rate to determine a second depth of discharge.
In a possible implementation, the mapping establishing module may include:
and the fourth acquisition unit is used for charging the battery by using the first preset current value and acquiring the battery chemical ID in the battery charging process.
And a fourth determination unit for determining a correspondence between the open-circuit voltage and the depth of discharge according to the battery chemistry ID.
In a possible embodiment, the battery has a plurality of consecutive charging modes, and the charging device may include:
a first detection unit for detecting an open circuit voltage of the battery when the battery is charged in a first charging mode;
the first switching unit is used for switching the charging mode of the battery to a second charging mode when the open-circuit voltage of the battery reaches a first preset threshold value, wherein the first charging mode and the second charging mode are any two adjacent charging modes in the plurality of charging modes, and the first preset threshold value is a switching open-circuit voltage value of the two adjacent charging modes.
Wherein the charging current of the first charging mode and the charging current of the second charging mode are different, or the charging voltage of the first charging mode and the charging voltage of the second charging mode are different.
In one possible embodiment, the first charging mode is a constant current charging mode, and the second charging mode is a constant voltage charging mode, and the charging device includes:
a first detection subunit for detecting an open-circuit voltage of the battery when the battery is charged in the constant-voltage charging mode;
and the first switching subunit is used for switching the charging mode of the battery into the constant-voltage charging mode when the open-circuit voltage of the battery reaches a first preset threshold value.
In one possible embodiment, the first charging mode is a first current charging mode, and the second charging mode is a second current charging mode, and the charging device includes:
a second detection subunit for detecting an open-circuit voltage of the battery when the battery is charged in the first current charging mode;
and the second switching subunit is used for switching the charging mode of the battery to a second current charging mode when the open-circuit voltage of the battery reaches a first preset threshold value.
The charging current of the first current charging mode is a first constant current, the charging current of the second current charging mode is a second constant current, and the first constant current and the second constant current are different.
Further, the charging device may further include:
and the stopping unit is used for detecting the charging voltage of the battery when the battery is charged in the first charging mode, stopping detecting the open-circuit voltage when the charging voltage of the battery is greater than or equal to the maximum allowable charging voltage of the battery, and switching the charging mode of the battery to the second charging mode.
The details of each charging device module are already described in detail in the corresponding virtual object transmission method, and therefore are not described herein again.
It should be noted that although in the above detailed description several modules or units of the charging device are mentioned, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 900 according to such an embodiment of the invention is described below with reference to fig. 9. The electronic device 900 shown in fig. 9 is only an example and should not bring any limitations to the function and scope of use of the embodiments of the present invention.
As shown in fig. 9, the electronic device 900 is embodied in the form of a general purpose computing device. Components of electronic device 900 may include, but are not limited to: the at least one processing unit 910, the at least one memory unit 920, a bus 930 connecting different system components (including the memory unit 920 and the processing unit 910), a display unit 940, a charge and discharge circuit 960, and a battery 970.
Wherein, the storage unit stores program codes, which can be executed by the processing unit 910, so that the processing unit 910 performs the steps according to various exemplary embodiments of the present disclosure described in the above section of "exemplary method" of this specification, the processing unit 910 performs the steps of various exemplary embodiments of the present disclosure, and sends a control signal to the charging and discharging circuit 960 according to the execution result, and acquires parameters and the like required for performing the steps of various exemplary embodiments of the present disclosure, and the charging and discharging circuit 960 adjusts the power signal input by the input interface to a preset voltage or a preset current in response to the control signal, and charges the battery 970.
The storage unit 920 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM)9201 and/or a cache memory unit 9202, and may further include a read only memory unit (ROM) 9203.
The electronic device 900 may also communicate with one or more external devices 980 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 900, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 900 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interface 950. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 900, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
It is understood that the processing unit 910, the storage unit 920, the bus 930, the display unit 940, and other components of the electronic device can be powered by the battery 970 through the charging and discharging circuit 960.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above-mentioned "exemplary methods" section of the present description, when said program product is run on the terminal device.
Referring to fig. 10, a program product 1000 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (13)
1. A charging method, characterized in that the charging method comprises:
in the charging process, acquiring the open-circuit voltage of the battery;
and when the open-circuit voltage of the battery reaches a preset threshold value, switching the charging mode of the battery, wherein the preset threshold value is a critical open-circuit voltage value when the charging mode of the battery is switched.
2. The charging method of claim 1, wherein said obtaining an open circuit voltage of the battery comprises:
acquiring a first depth of discharge of the battery, wherein the first depth of discharge is the depth of discharge of the battery at the beginning of charging;
determining a second depth of discharge according to the first depth of discharge and the increment of the battery electric quantity in the charging process;
and acquiring the open-circuit voltage of the battery according to the second depth of discharge and a first mapping relation, wherein the first mapping relation comprises the mapping relation between the open-circuit voltage and the depth of discharge.
3. The method of charging of claim 2, wherein said obtaining a first depth of discharge of said battery comprises:
acquiring an initial voltage of the battery to serve as an initial open-circuit voltage;
and determining the first depth of discharge according to the initial open-circuit voltage and the first mapping relation.
4. The charging method of claim 2, wherein the obtaining an open circuit voltage of the battery further comprises:
acquiring current in the battery charging process, and performing charge integration to obtain increment of battery electric quantity;
and determining the electric quantity change rate of the battery according to the increment of the electric quantity and the rated electric quantity of the battery, wherein the rated electric quantity is the maximum electric quantity allowed to be stored by the battery.
5. The method of charging of claim 4, wherein determining a second depth of discharge based on the first depth of discharge and an increase in battery charge during charging comprises:
and performing difference operation on the first depth of discharge and the electric quantity change rate to determine the second depth of discharge.
6. The charging method according to claim 1, further comprising:
charging the battery by using a first preset current value to obtain the chemical ID of the battery in the charging process of the battery;
and determining a first mapping relation according to the battery chemical ID, wherein the first mapping relation comprises a mapping relation between the battery open-circuit voltage and the discharge depth.
7. The charging method of claim 1, wherein the battery has a plurality of consecutive charging modes, the charging method comprising:
detecting an open circuit voltage of a battery while the battery is charged in a first charging mode;
when the open-circuit voltage of the battery reaches a first preset threshold value, switching the charging mode of the battery to a second charging mode, wherein the first charging mode and the second charging mode are any two adjacent charging modes in the plurality of charging modes, and the first preset threshold value is a switching open-circuit voltage value of the two adjacent charging modes;
wherein the charging current of the first charging mode and the charging current of the second charging mode are different, or the charging voltage of the first charging mode and the charging voltage of the second charging mode are different.
8. The charging method according to claim 7, wherein the first charging mode is a constant-current charging mode, and the second charging mode is a constant-voltage charging mode, and the charging method includes:
detecting an open-circuit voltage of the battery while the battery is charged in the constant voltage charging mode;
and when the open-circuit voltage of the battery reaches the first preset threshold value, switching the charging mode of the battery to the constant-voltage charging mode.
9. The charging method of claim 7, wherein the first charging mode is a first current charging mode, and the second charging mode is a second current charging mode, the charging method comprising:
detecting an open circuit voltage of the battery while the battery is charged in the first current charging mode;
when the open-circuit voltage of the battery reaches the first preset threshold value, switching the charging mode of the battery to the second current charging mode;
the charging current of the first current charging mode is a first constant current, the charging current of the second current charging mode is a second constant current, and the first constant current and the second constant current are different.
10. The charging method according to claim 7, further comprising:
when the charging mode is used for charging, the charging voltage of the battery is detected, and when the charging voltage of the battery is larger than or equal to the maximum allowable charging voltage of the battery, the charging mode of the battery is switched to a second charging mode.
11. A charging device, characterized in that the charging device comprises:
the open-circuit voltage acquisition module is used for acquiring the open-circuit voltage of the battery in the charging process;
the charging mode switching module is used for switching the charging mode of the battery when the open-circuit voltage of the battery reaches a preset threshold value, and the preset threshold value is a critical open-circuit voltage value when the charging mode of the battery is switched.
12. An electronic device, comprising
A processor; and
a memory having computer readable instructions stored thereon which, when executed by the processor, implement the method of any of claims 1 to 10.
13. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 10.
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