CN111613846B - Battery charging method, handheld terminal and readable storage medium - Google Patents
Battery charging method, handheld terminal and readable storage medium Download PDFInfo
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- CN111613846B CN111613846B CN202010666231.1A CN202010666231A CN111613846B CN 111613846 B CN111613846 B CN 111613846B CN 202010666231 A CN202010666231 A CN 202010666231A CN 111613846 B CN111613846 B CN 111613846B
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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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- 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
- H01M10/443—Methods for charging or discharging in response to temperature
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application discloses a battery charging method, a handheld terminal and a readable storage medium, wherein the battery charging method comprises the following steps: acquiring terminal voltages at two ends of the battery in the process of charging the battery according to a first charging system; acquiring a corresponding preset pressure difference according to the terminal voltage, wherein the preset pressure difference is a difference value between the negative voltage of the battery and the reference voltage of the reference electrode under different terminal voltages; and when the preset pressure difference is smaller than or equal to a preset value, controlling the battery to discharge according to a preset mode. The present application has the advantage of extending the cycle life of the battery.
Description
Technical Field
The present disclosure relates to the field of power supply technologies, and in particular, to a battery charging method, a handheld terminal, and a readable storage medium.
Background
Currently, during the recycling process of secondary batteries such as lithium ion batteries, the battery performance may be degraded due to the following reasons: side reactions occur during charging of the battery, which consume active species that can be effective, resulting in reduced battery cycling times and reduced battery life.
The above description is only for illustrating the technical problems to be solved by the present application, and does not represent that the above description is the prior art.
Disclosure of Invention
The present disclosure is directed to a method for supplying power to a battery, and aims to solve the problem of life degradation of the battery due to side reactions during charging of the battery.
In order to achieve the above object, the present application provides a charging method for a battery, the charging method comprising the steps of:
acquiring terminal voltages at two ends of the battery in the process of charging the battery according to a first charging system;
acquiring a corresponding preset pressure difference according to the terminal voltage, wherein the preset pressure difference is a difference value between the negative voltage of the battery and the reference voltage of the reference electrode under different terminal voltages;
and when the preset pressure difference is smaller than or equal to a preset value, controlling the battery to discharge according to a preset mode.
Further, the step of obtaining the corresponding preset voltage difference according to the terminal voltage further includes:
acquiring the temperature of the battery;
and adjusting the preset pressure difference according to the temperature, wherein the smaller the temperature is, the smaller the corresponding preset pressure difference is.
Further, the step of obtaining the corresponding preset voltage difference according to the terminal voltage further includes:
acquiring the charging current of the battery;
and adjusting the preset voltage difference according to the charging current, wherein the larger the charging current is, the smaller the corresponding preset voltage difference is.
Further, the step of obtaining the corresponding preset voltage difference according to the terminal voltage further includes:
charging stages according to the first charging system;
and adjusting the preset pressure difference according to each charging stage, wherein the preset pressure difference corresponding to the constant-current charging stage is less than or equal to the preset pressure difference corresponding to the constant-voltage stage.
Further, the step of controlling the battery to discharge in a preset manner includes:
and controlling the battery to perform pulse discharge according to the preset discharge duration and/or the preset discharge current.
Further, the step of controlling the battery to perform pulse discharge according to a preset discharge duration and/or a preset discharge current includes:
acquiring the absolute value of the difference between the preset pressure difference and the preset value;
and adjusting the preset discharge time and/or the preset discharge current according to the difference absolute value, wherein the larger the difference absolute value is, the longer the preset discharge time is, and/or the larger the preset discharge current is.
Further, the step of obtaining the terminal voltage across the battery further comprises:
stopping charging the battery when the terminal voltage is greater than or equal to a preset cut-off voltage; and/or
And when the current charging current is less than or equal to a preset cut-off current, stopping charging the battery.
Further, the charging method further includes:
acquiring first reference information;
when the first reference information meets a first preset condition, controlling the battery to be switched from the first charging system to a second charging system;
and under the second charging system, the full charging time of the battery is longer than that under the first charging system.
Further, the first reference information at least comprises a current time and a current battery capacity; the first reference information satisfying a first preset condition at least includes one of:
the current time reaches a first preset time;
the current battery capacity is lower than the preset battery capacity.
Further, the step of controlling the battery to switch from the first charging system to the second charging system includes:
and in the constant current charging stage, controlling the battery to be charged with a target current, wherein the target current is smaller than the charging current corresponding to the constant current charging stage in the first charging mode.
Further, the step of controlling the battery to switch from the first charging system to the second charging system includes:
and when the terminal voltage of the battery reaches a target cut-off voltage, stopping charging the battery, wherein the target cut-off voltage is less than the cut-off voltage corresponding to the first charging system.
Further, the step of controlling the battery to switch from the first charging system to the second charging system includes:
and when the charging current of the battery is smaller than or equal to a target cut-off current, stopping charging the battery, wherein the target cut-off current is larger than the cut-off current corresponding to the first charging system.
Further, the step of controlling the battery to switch from the first charging system to the second charging system includes:
and outputting low-power reminding information when the electric quantity of the battery is smaller than or equal to a target reminding electric quantity, wherein the target reminding electric quantity is larger than the reminding electric quantity corresponding to the first charging system.
Further, the step of controlling the battery to switch from the first charging system to the second charging system includes:
acquiring second reference information;
and when the second reference information meets a second preset condition, switching the battery from the second charging system to the first charging system.
Further, the second reference information at least comprises the current time and the current battery health state; the second reference information satisfying a second preset condition includes one of:
the current time reaches a second preset time;
the current battery capacity is higher than the preset battery capacity.
In order to achieve the above object, the present application further provides a handheld terminal, which includes a memory, a processor, and a battery charging program stored in the memory and operable on the processor, wherein the battery charging program, when executed by the processor, implements the steps of the battery charging method according to any one of the above aspects.
To achieve the above object, the present application further provides a readable storage medium, wherein the computer readable storage medium stores a battery charging program, and the battery charging program, when executed by a processor, implements the steps of the battery charging method according to any one of the above.
In the technical scheme of this application, in the charging process of battery, acquire the terminal voltage at battery both ends, and according to the terminal voltage acquires the preset pressure differential that corresponds, and preset pressure differential is different under the terminal voltage, the difference between the negative pole voltage of battery and the reference voltage of reference electrode, preset pressure differential characterization the probability size that the side reaction takes place for the battery when preset pressure differential is less than or equal to the default, control the battery discharges according to the mode of predetermineeing, eliminates the polarization potential of battery negative pole reduces the probability that the side reaction takes place to avoid analyzing the emergence of lithium phenomenon, prolong the cycle life of battery.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a method for powering a battery according to the present application;
FIG. 3 is a schematic flow chart illustrating another embodiment of a method for powering a battery according to the present application;
FIG. 4 is a schematic flow chart illustrating a method for powering a battery according to another embodiment of the present disclosure;
FIG. 5 is a schematic flow chart illustrating a method for powering a battery according to another embodiment of the present disclosure;
fig. 6 is a detailed flowchart of step S31 of the battery power supply method of the present application;
FIG. 7 is a schematic flow chart illustrating another embodiment of a method for powering a battery according to the present application;
fig. 8 is a schematic flowchart of another embodiment of a method for supplying power to a battery according to the present application.
The objectives, features, and advantages of the present application will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a schematic diagram of a hardware operating environment of a terminal according to an embodiment of the present application. The terminal in the embodiment of the application is a mobile terminal or a fixed terminal, such as a mobile phone. As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a non-volatile memory such as a disk memory), the memory 1005 may optionally also be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the terminal shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a control program of the apparatus.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call a control program of the apparatus stored in the memory 1005 and perform the following operations:
acquiring terminal voltages at two ends of the battery in the process of charging the battery according to a first charging system;
acquiring a corresponding preset pressure difference according to the terminal voltage, wherein the preset pressure difference is a difference value between the negative voltage of the battery and the reference voltage of the reference electrode under different terminal voltages;
and when the preset pressure difference is smaller than or equal to a preset value, controlling the battery to discharge according to a preset mode.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
acquiring the temperature of the battery;
and adjusting the preset pressure difference according to the temperature, wherein the smaller the temperature is, the smaller the corresponding preset pressure difference is.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
acquiring the charging current of the battery;
and adjusting the preset voltage difference according to the charging current, wherein the larger the charging current is, the smaller the corresponding preset voltage difference is.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
charging stages according to the first charging system;
and adjusting the preset pressure difference according to each charging stage, wherein the preset pressure difference corresponding to the constant-current charging stage is less than or equal to the preset pressure difference corresponding to the constant-voltage stage.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
and controlling the battery to perform pulse discharge according to the preset discharge duration and/or the preset discharge current.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
acquiring the absolute value of the difference between the preset pressure difference and the preset value;
and adjusting the preset discharge time and/or the preset discharge current according to the difference absolute value, wherein the larger the difference absolute value is, the longer the preset discharge time is, and/or the larger the preset discharge current is.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
stopping charging the battery when the terminal voltage is greater than or equal to a preset cut-off voltage; and/or
And when the current charging current is less than or equal to a preset cut-off current, stopping charging the battery.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
acquiring first reference information;
when the first reference information meets a first preset condition, controlling the battery to be switched from the first charging system to a second charging system;
and under the second charging system, the full charging time of the battery is longer than that under the first charging system.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
the first reference information at least comprises current time and current battery capacity; the first reference information satisfying a first preset condition at least includes one of:
the current time reaches a first preset time;
the current battery capacity is lower than the preset battery capacity.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
and in the constant current charging stage, controlling the battery to be charged with a target current, wherein the target current is smaller than the charging current corresponding to the constant current charging stage in the first charging mode.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
and when the terminal voltage of the battery reaches a target cut-off voltage, stopping charging the battery, wherein the target cut-off voltage is less than the cut-off voltage corresponding to the first charging system.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
and when the charging current of the battery is smaller than or equal to a target cut-off current, stopping charging the battery, wherein the target cut-off current is larger than the cut-off current corresponding to the first charging system.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
and outputting low-power reminding information when the electric quantity of the battery is smaller than or equal to a target reminding electric quantity, wherein the target reminding electric quantity is larger than the reminding electric quantity corresponding to the first charging system.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
acquiring second reference information;
and when the second reference information meets a second preset condition, switching the battery from the second charging system to the first charging system.
Further, the processor 1001 may call a control program of the apparatus stored in the memory 1005, and also perform the following operations:
the second reference information at least comprises the current time and the current battery health state; the second reference information satisfying a second preset condition includes one of:
the current time reaches a second preset time;
the current battery capacity is higher than the preset battery capacity.
Referring to fig. 2, in embodiment 1 of the power supply method for a battery of the present application, the power supply method for a battery includes the following steps:
step S10, acquiring terminal voltages at two ends of the battery during the process of charging the battery according to the first charging system.
In this embodiment, the charging modes define how to charge the battery, for example, the charging modes may include a slow charging mode and a fast charging mode, where the fast charging mode charges the battery faster than the slow charging mode, and it can be understood that different charging modes may be formed by presetting the charging current and/or the charging voltage of the battery in different charging stages. The first charging system of this embodiment may be various charging systems, and is preferentially a fast charging system, for example, the first charging system may be a charging system of 1.5C to 4.1V; 1C to 4.3V; 0.5C to 4.4V, CV to 0.05C, where C is a representation of the nominal capacity of the battery versus current, such as a battery with a capacity of 1000mAh, 1C is the charging current 1000mA, assuming that the capacity of the battery is 1000mAh, "1.5C to 4.1V" means charging the battery with a current of 1500mA (1.5C equals 1.5 times 1000mA equals 1500mA) until the terminal voltage of the battery reaches 4.1V, "1C to 4.3V" means charging the battery with a current of 1000mA (1C equals 1 times 1000mA equals 1000mA) until the terminal voltage of the battery reaches 4.3V; "0.5C to 4.4V" means that the battery is charged with a current of 500mA (0.5C equals 0.5 times 1000mA equals 500mA) until the terminal voltage of the battery reaches 4.4V; "CV to 0.05C" means constant voltage charging until the current of the battery is equal to or less than 0.05C (0.05C is equal to 0.05 multiplied by 1000mA is equal to 50mA), which is performed sequentially, that is, the first charging scheme charges the battery in the order of 1.5C to 4.1V, 1C to 4.3V, 0.5C to 4.4V, CV to 0.05C, after CV to 0.05C, it means that the battery has been fully charged, at which time charging of the battery may be stopped.
In this embodiment, the first charging standard of the battery is preferably a quick charging standard, and may be other charging standards, where the first charging standard is 1.5C to 4.1V; 1C to 4.3V; the charging process from 0.5C to 4.4V and from CV to 0.05C, wherein in the process that the battery is charged in the first charging mode, terminal voltages at two ends of the battery are obtained, and the terminal voltages at the two ends of the battery are also the voltage difference between the anode and the cathode of the battery. It is understood that the terminal voltage of the battery generally shows a tendency to increase gradually during the charging process.
And step S20, acquiring a corresponding preset pressure difference according to the terminal voltage, wherein the preset pressure difference is a difference value between the negative electrode voltage of the battery and the reference voltage of the reference electrode under different terminal voltages.
In this embodiment, a corresponding relationship between the terminal voltage and the preset differential voltage may be preset, and the preset differential voltage corresponding to the terminal voltage may be obtained according to the obtained terminal voltage of the battery and the corresponding relationship between the preset terminal voltage and the preset differential voltage. The preset voltage difference is a difference value between the cathode voltage of the battery and the reference voltage of the reference electrode measured through experiments under different terminal voltages, wherein the specific mode of the corresponding relation between the terminal voltage measured through the experiments and the preset voltage difference is as follows: in the experimental process, firstly, a charging system required by the battery is determined, taking the first charging system as an example, then a three-electrode system of the battery is manufactured, the battery is charged according to the determined first charging system, in the charging process, the terminal voltage of the battery, the negative electrode voltage of the battery under different terminal voltages and the reference voltage of the reference electrode are obtained, and the voltage difference between the negative electrode voltage of the battery and the reference electrode is calculated and used as the preset voltage difference, so that different preset voltage differences corresponding to different terminal voltages are obtained. The method specifically comprises the following steps of: the manufacturing method of the three-electrode system of the battery is completed by additionally adding a 50-micrometer copper wire in the normal manufacturing process of the common battery, separating the copper wire from positive and negative electrode plates by using a diaphragm, charging the battery to 50% of electric quantity after the battery is formed and subjected to capacity grading, and plating lithium on the copper wire by using a current less than 1 mA.
And step S30, when the preset pressure difference is smaller than or equal to a preset value, controlling the battery to discharge according to a preset mode.
In this embodiment, the preset values may be set to be different according to different capacities or types of batteries, for example, a typical value of the preset value may be set to be-0.16 or-0.17, and the preset value is-0.16 as an example, when the preset pressure difference is less than or equal to the preset value, that is, -0.16, it indicates that the battery has a high probability of side reactions, a lithium deposition phenomenon may occur during the side reactions, and an effective active material, that is, lithium ions, is consumed, so as to cause a cycle life decay of the battery, therefore, in this embodiment, when the preset pressure difference is less than or equal to the preset value, that is, -0.16, the battery is controlled to discharge according to a preset manner, for example, discharge according to a preset current or a preset time length, so as to eliminate a polarization potential of the negative electrode of the battery, and reduce a probability of side reactions, thereby avoiding the occurrence of the phenomenon of lithium precipitation and prolonging the cycle life of the battery.
In summary, in this embodiment, in the charging process of the battery, terminal voltages at two ends of the battery are obtained, and a corresponding preset differential pressure is obtained according to the terminal voltages, where the preset differential pressure is a difference between a negative voltage of the battery and a reference voltage of a reference electrode at different terminal voltages, and the preset differential pressure represents a probability of side reactions occurring in the battery, and when the preset differential pressure is less than or equal to a preset value, the battery is controlled to discharge according to a preset manner, so as to eliminate a polarization potential of the negative electrode of the battery, reduce a probability of side reactions, avoid occurrence of a lithium analysis phenomenon, and prolong a cycle life of the battery.
Referring to fig. 3, based on the above embodiment 1, in embodiment 2 of the method for supplying power to a battery, after the step of obtaining a corresponding preset voltage difference according to the terminal voltage, the method further includes:
step S40, acquiring the temperature of the battery;
and step S50, adjusting the preset pressure difference according to the temperature, wherein the smaller the temperature is, the smaller the corresponding preset pressure difference is.
In this embodiment, the temperature of the battery may affect the preset differential pressure corresponding to the terminal voltage, and the smaller the temperature of the battery is, the greater the probability of side reaction is, for example, when the temperature of the battery is 25 ℃, the preset differential pressure corresponding to the terminal voltage is 0.1V, which is greater than the preset value of-0.16, at this time, the probability of side reaction of the battery is smaller, and no discharging operation is required; when the temperature of the battery is 0 ℃, the preset pressure difference corresponding to the terminal voltage is-0.25V and is smaller than the preset value of-0.16, and at the moment, the probability of side reaction of the battery is high, and the discharging operation is needed. Therefore, the temperature of the battery is obtained, the preset pressure difference is adjusted according to the temperature of the battery, and whether the discharging operation is needed or not is further judged according to the adjusted preset pressure difference, so that the accuracy of the discharging operation is improved. Specifically, in one or more experimental processes, a mapping relationship between different terminal voltages, different battery temperatures, and a preset difference may be obtained, and the mapping relationship between the three is prestored in the handheld terminal.
Referring to fig. 4, based on the above 1-2 embodiments, in the 3 rd embodiment of the method for supplying power to a battery, the step of obtaining a corresponding preset voltage difference according to the terminal voltage further includes:
step S60, acquiring a charging current of the battery;
step S70, adjusting the preset voltage difference according to the charging current, wherein the larger the charging current is, the smaller the corresponding preset voltage difference is.
In this embodiment, the charging current of the battery may affect the preset voltage difference corresponding to the terminal voltage, and the larger the charging current is, the smaller the corresponding preset voltage difference is, and the higher the probability of occurrence of the side reaction is, in this embodiment, the charging current of the battery is obtained, and the preset voltage difference is adjusted according to the charging current of the battery, so that the preset voltage difference is obtained more accurately, and further, whether the discharging operation is required or not is determined according to the adjusted preset voltage difference, so that the accuracy of the discharging operation is improved. Specifically, in one or more experimental processes, a mapping relationship between different terminal voltages, different battery charging currents and different preset values may be obtained, and the mapping relationship between the terminal voltages, the battery charging currents and the different preset values may be prestored in the handheld terminal.
Referring to fig. 5, based on the above embodiments 1-3, in embodiment 4 of the method for supplying power to a battery, the step of obtaining a corresponding preset voltage difference according to the terminal voltage further includes:
step S80, according to each charging stage of the first charging standard;
and step S90, adjusting the preset pressure difference according to each charging stage, wherein the preset pressure difference corresponding to the constant current charging stage is less than or equal to the preset pressure difference corresponding to the constant voltage stage.
In this embodiment, since the first charging standard treasury has a plurality of charging stages, for example, 1.5C to 4.1V described above; 1C to 4.3V; 0.5 to 4.4V and CV to 0.05C, different charging stages have different charging currents and charging temperatures, so that the preset pressure difference corresponding to the terminal voltage is adjusted by obtaining each charging stage and according to the charging current and the charging temperature corresponding to each charging stage, the preset pressure difference is more accurately obtained, whether the discharging operation is needed or not is further judged according to the adjusted preset pressure difference, and the accuracy of the discharging operation is improved. Specifically, in one or more experimental processes, the mapping relationships between different terminal voltages and each charging stage and the preset difference may be obtained, and the mapping relationships between the three may be prestored in the handheld terminal.
Based on the foregoing embodiments 1 to 4, in embodiment 5 of the method for supplying power to a battery, the step of controlling the battery to discharge in a preset manner includes:
and step S31, controlling the battery to perform pulse discharge according to the preset discharge duration and/or the preset discharge current.
In this embodiment, when the preset voltage difference corresponding to the terminal voltage is less than or equal to the preset value, the battery is controlled to perform pulse discharge according to a preset discharge time and/or a preset discharge current, where the preset discharge time and/or the preset discharge current may be preset, or may be dynamically adjusted according to a difference between the preset voltage difference and the preset value.
Referring to fig. 6, based on the foregoing embodiments 1 to 5, in embodiment 6 of the power supply method for a battery, the step of controlling the battery to perform pulse discharge according to a preset discharge duration and/or a preset discharge current includes:
step S311, acquiring a difference absolute value between the preset pressure difference and the preset value;
step S312, adjusting the preset discharging time and/or the preset discharging current according to the difference absolute value, wherein the larger the difference absolute value is, the longer the preset discharging time is, and/or the larger the preset discharging current is.
In this embodiment, by obtaining an absolute value of a difference between the preset pressure difference and the preset value, the larger the absolute value of the difference is, the larger the probability of the side reaction of the battery is, the longer the side reaction is, and the more the distance of the side reaction is, and the lithium separation phenomenon is more serious, so that the preset discharge time and/or the preset discharge current is adjusted according to the absolute value of the difference, and the larger the absolute value of the difference is, the longer the preset discharge time is, and/or the larger the preset discharge current is, so as to further quickly reduce the probability of the side reaction, so as to quickly eliminate the polarization potential of the negative electrode of the battery, and avoid the lithium separation phenomenon.
Based on the above embodiments 1 to 6, in embodiment 7 of the method for supplying power to a battery, the step of obtaining a terminal voltage across the battery further includes:
step S100, when the terminal voltage is greater than or equal to a preset cut-off voltage, stopping charging the battery;
and/or step S110, when the current charging current is less than or equal to a preset cut-off current, stopping charging the battery.
In this embodiment, when the terminal voltage is greater than or equal to a preset cut-off voltage and/or when the current charging current is less than or equal to a preset cut-off current, the battery is stopped from being charged, so that the overcharge of the battery can be effectively avoided, and the cycle life of the battery is further prolonged.
Referring to fig. 7, based on the above embodiments 1-7, in an embodiment 8 of the method for supplying power to a battery, the method for charging further includes:
step S120, acquiring first reference information;
step S130, when the first reference information meets a first preset condition, controlling the battery to switch from the first charging system to a second charging system; and under the second charging system, the full charging time of the battery is longer than that under the first charging system.
In this embodiment, the second charging mode belongs to a full charging mode compared to the first charging mode; the first reference information comprises information such as current time, current battery temperature and current battery capacity, when the first reference information meets a first preset condition, the battery is controlled to be switched from the first charging system to a second charging system, and in the second charging system, the full charging time of the battery is longer than the full charging time of the battery in the first charging system, for example, the full charging time of the battery in the first charging system is 30min, and the full charging time of the battery in the second charging system is 100min, so that the rapid decay of the cycle life of the battery caused by rapid charging can be avoided.
Based on the foregoing 8 th embodiment, in a 9 th embodiment of the power supply method for a battery, the first reference information includes at least a current time and a current battery capacity; the first reference information satisfying a first preset condition at least includes one of:
the current time reaches a first preset time;
the current battery capacity is lower than the preset battery capacity.
In this embodiment, the first preset time may be 23 pm, for example, because the user generally sleeps after 23 pm and continues to use the handheld terminal the next morning, when the current time reaches 23 pm, the battery is controlled to be switched from the first charging system to the second charging system, and the battery is fully charged in the second charging system for a longer time, so that rapid decay of the cycle life of the battery due to rapid charging can be avoided.
In this embodiment, the battery capacity represents the state of health of the battery to a certain extent, for example, the nominal capacity of the battery is 5000mAh, and if the maximum capacity of the fully charged battery is 4000mAh, it indicates that the cycle life of the battery is greatly attenuated. The preset battery capacity may be set to be different according to different batteries and different nominal capacities.
Based on the foregoing embodiments 8-9, in the 10 th embodiment of the method for supplying power to a battery, the step of controlling the battery to switch from the first charging scheme to the second charging scheme includes, after the step of controlling the battery to switch from the first charging scheme to the second charging scheme:
step S140, in a constant current charging stage, controlling the battery to be charged with a target current, where the target current is smaller than a charging current corresponding to the constant current charging stage in the first charging system.
In the present embodiment, in the second charging mode, in the constant current charging stage, the battery is controlled to be charged with the target current, the target current is smaller than the charging current corresponding to the constant current charging stage in the first charging mode, for example, in the first charging standard, the constant current charging stage includes three sub-stages of 1.5C to 4.1V, 1C to 4.3V, and 0.5C to 4.4V, wherein, the charging current is 0.5C, 1C and 1.5C, under the second charging system, the target current for the constant current charging phase ranges between 0.3C-0.7C, for example, the target current may be 0.7C to 4.1V, 0.5C to 4.3V, 0.3C to 4.4V, corresponding to the above three sub-divided stages, and thus, the charging current of the battery in the constant-current charging stage of the second charging system can be reduced, and the phenomenon that the cycle life of the battery is shortened due to overlarge charging current is avoided.
Based on the foregoing embodiments 8-10, in embodiment 11 of the method for supplying power to a battery, the step of controlling the battery to switch from the first charging scheme to the second charging scheme includes, after the step of controlling the battery to switch from the first charging scheme to the second charging scheme:
step S150, when the terminal voltage of the battery reaches a target cut-off voltage, stopping charging the battery, where the target cut-off voltage is less than the cut-off voltage corresponding to the first charging system.
In this embodiment, the target cut-off voltage may be set by a user, or may be a default cut-off voltage, where in the second charging system, the target cut-off voltage is smaller than the cut-off voltage corresponding to the first charging system, for example, the cut-off voltage in the first charging system is a rated terminal voltage of the battery, and the target cut-off voltage in the second charging system is 90% of the rated terminal voltage, that is, in the second charging system, the terminal voltage when the battery is fully charged is smaller than the terminal voltage when the battery is fully charged in the first charging system, so that in the second charging system, the battery can be prevented from being overcharged, thereby prolonging the cycle life of the battery.
Based on the foregoing embodiments 8-11, in the 12 th embodiment of the method for supplying power to a battery, the step of controlling the battery to switch from the first charging scheme to the second charging scheme includes, after the step of controlling the battery to switch from the first charging scheme to the second charging scheme:
step S160, when the charging current of the battery is less than or equal to a target cutoff current, stopping charging the battery, where the target cutoff current is greater than the cutoff current corresponding to the first charging system.
In this embodiment, the target cutoff current may be set by a user, or may be a default cutoff current, where in the second charging system, the target cutoff current is smaller than a cutoff voltage corresponding to the first charging system, for example, the cutoff voltage in the first charging system is 0.05C, and the target cutoff current in the second charging system is 0.1C, that is, in the second charging system, the charging current when the battery is fully charged is greater than the charging current when the battery is fully charged in the first charging system, so that in the second charging system, the battery may be prevented from being overcharged, and the cycle life of the battery may be prolonged.
Based on the foregoing embodiments 8-12, in embodiment 13 of the method for supplying power to a battery, the step of controlling the battery to switch from the first charging scheme to the second charging scheme includes, after the step of controlling the battery to switch from the first charging scheme to the second charging scheme:
step S170, outputting low-power reminding information when the electric quantity of the battery is smaller than or equal to a target reminding electric quantity, wherein the target reminding electric quantity is larger than the reminding electric quantity corresponding to the first charging mode.
In this embodiment, when the electric quantity of the battery is less than or equal to the target reminding electric quantity, low-power reminding information is output to remind a user of charging in time, and the target reminding electric quantity in the second charging system is greater than the reminding electric quantity corresponding to the first charging system, for example, the target reminding electric quantity in the second charging system is 20%, and the reminding electric quantity corresponding to the first charging system is 10%, compared with the first charging system, the battery electric quantity in the second charging system is reminded to be lower more quickly, so as to remind the user of charging more quickly, and thus, when the full-charge duration of the second charging system is significantly greater than the full-charge duration of the first charging system, the full-charge duration in the second charging system can be shortened, and the user experience is improved.
Referring to fig. 8, based on the above 8 th to 13 th embodiments, in a 14 th embodiment of the method for supplying power to a battery, after the step of controlling the battery to switch from the first charging scheme to the second charging scheme, the method includes:
step S180, acquiring second reference information;
step S190, when the second reference information meets a second preset condition, switching the battery from the second charging system to the first charging system.
In this embodiment, the second reference information includes information of current time, current battery temperature, current battery capacity, and the like, and when the second reference information satisfies a second preset condition, the battery is controlled to be switched from the second charging system to the first charging system, and in the first charging system, the full charge duration of the battery is less than the full charge duration of the battery in the second charging system, for example, the full charge duration of the battery in the first charging system is 30min, and the full charge duration of the battery in the second charging system is 100min, so as to improve the charging speed of the battery.
Based on the 14 th embodiment, in a 15 th embodiment of the method for supplying power to a battery, the second reference information at least includes a current time and a current state of health of the battery; the second reference information satisfying a second preset condition includes one of:
the current time reaches a second preset time;
the current battery capacity is higher than the preset battery capacity.
In this embodiment, the second preset time may be, for example, 8 am, and since the user is generally in a working or entertainment state after 8 am and the frequency or duration of using the handheld terminal is long, the user continues to quickly charge the battery for use, so that when the current time reaches 8 am, the battery is controlled to be switched from the second charging system to the first charging system, so as to quickly charge the battery by using the first charging system, and provide charging efficiency. The second preset time may be manually set by a user.
In this embodiment, since the battery is replaced by the handheld terminal or a new electrolyte is injected into the battery, the current battery capacity is higher than the preset battery capacity, for example, the current capacity of the battery is 5000mAh, the preset battery capacity is 4000mAh, and the current battery capacity is higher than the preset battery capacity, it indicates that there is no large attenuation in the cycle life of the battery. The preset battery capacity may be manually set by a user.
In order to achieve the above object, the present application also provides a handheld terminal, which includes a memory, a processor, and a battery charging program stored in the memory and operable on the processor, wherein the battery charging program, when executed by the processor, implements the steps of the battery charging method as described above.
To achieve the above object, the present application further provides a readable storage medium, wherein the computer readable storage medium stores a battery charging program, and the battery charging program, when executed by a processor, implements the steps of the battery charging method as described above.
Embodiments of the present application also provide a computer program product, which includes computer program code, when the computer program code runs on a computer, the computer is caused to execute the method as described in the above various possible embodiments.
An embodiment of the present application further provides a chip, which includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a device in which the chip is installed executes the method described in the above various possible embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and further, where similarly-named elements, features, or elements in different embodiments of the disclosure may have the same meaning, or may have different meanings, that particular meaning should be determined by their interpretation in the embodiment or further by context with the embodiment.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
It should be understood that, although the steps in the flowcharts in the embodiments of the present application are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, in different orders, and may be performed alternately or at least partially with respect to other steps or sub-steps of other steps.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a television, a mobile phone, a computer, a server, an apparatus, or a network device) to execute the method according to the embodiments of the present application.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (16)
1. A method of charging a battery, the method comprising the steps of:
acquiring terminal voltages at two ends of the battery in the process of charging the battery according to a first charging system;
acquiring a preset voltage difference corresponding to the terminal voltage according to the terminal voltage and a corresponding relation between the preset terminal voltage and the preset voltage difference, wherein the preset voltage difference is a difference value between the negative electrode voltage of the battery and the reference voltage of the reference electrode under different terminal voltages;
and when the preset pressure difference is smaller than or equal to a preset value, controlling the battery to discharge according to a preset mode.
2. The method for charging a battery according to claim 1, wherein said step of obtaining a corresponding predetermined voltage difference based on said terminal voltage further comprises:
acquiring the temperature or charging current of the battery;
adjusting the preset pressure difference according to the temperature, wherein the smaller the temperature is, the smaller the corresponding preset pressure difference is;
or adjusting the preset voltage difference according to the charging current, wherein the larger the charging current is, the smaller the corresponding preset voltage difference is.
3. The method for charging a battery according to claim 1, wherein said step of obtaining a corresponding predetermined voltage difference based on said terminal voltage further comprises:
charging stages according to the first charging system;
and adjusting the preset pressure difference according to each charging stage, wherein the preset pressure difference corresponding to the constant-current charging stage is less than or equal to the preset pressure difference corresponding to the constant-voltage stage.
4. The method of charging a battery according to claim 1, wherein the step of controlling the battery to discharge in a predetermined manner comprises:
and controlling the battery to perform pulse discharge according to the preset discharge duration and/or the preset discharge current.
5. The method for charging a battery according to claim 4, wherein the step of controlling the battery to perform pulse discharge according to a preset discharge duration and/or a preset discharge current comprises:
acquiring the absolute value of the difference between the preset pressure difference and the preset value;
and adjusting the preset discharge time and/or the preset discharge current according to the difference absolute value, wherein the larger the difference absolute value is, the longer the preset discharge time is, and/or the larger the preset discharge current is.
6. The method of charging a battery of claim 1, wherein said step of obtaining a terminal voltage across said battery is further followed by:
stopping charging the battery when the terminal voltage is greater than or equal to a preset cut-off voltage; and/or
And stopping charging the battery when the current charging current is less than or equal to a preset cut-off current.
7. The method of charging a battery according to any one of claims 1 to 6, further comprising:
acquiring first reference information;
when the first reference information meets a first preset condition, controlling the battery to be switched from the first charging system to a second charging system;
and under the second charging system, the full charging time of the battery is longer than that under the first charging system.
8. The method of charging a battery according to claim 7, wherein the first reference information includes at least a current time, a current battery capacity; the first reference information satisfying a first preset condition at least includes one of:
the current time reaches a first preset time;
the current battery capacity is lower than the preset battery capacity.
9. The method of charging a battery of claim 8, wherein the step of controlling the battery to switch from the first charging regime to the second charging regime is followed by:
and in the constant current charging stage, controlling the battery to be charged with a target current, wherein the target current is smaller than the charging current corresponding to the constant current charging stage in the first charging mode.
10. The method of charging a battery of claim 7, wherein the step of controlling the battery to switch from the first charging regime to the second charging regime is followed by:
and when the terminal voltage of the battery reaches a target cut-off voltage, stopping charging the battery, wherein the target cut-off voltage is less than the cut-off voltage corresponding to the first charging system.
11. The method of charging a battery of claim 7, wherein the step of controlling the battery to switch from the first charging regime to the second charging regime is followed by:
and when the charging current of the battery is smaller than or equal to a target cut-off current, stopping charging the battery, wherein the target cut-off current is larger than the cut-off current corresponding to the first charging system.
12. The method of charging a battery of claim 7, wherein the step of controlling the battery to switch from the first charging regime to the second charging regime is followed by:
and outputting low-power reminding information when the electric quantity of the battery is smaller than or equal to a target reminding electric quantity, wherein the target reminding electric quantity is larger than the reminding electric quantity corresponding to the first charging system.
13. The method of charging a battery of claim 7, wherein the step of controlling the battery to switch from the first charging regime to the second charging regime is followed by:
acquiring second reference information;
and when the second reference information meets a second preset condition, switching the battery from the second charging system to the first charging system.
14. The method of charging a battery according to claim 13, wherein the second reference information includes at least a current time, a current battery state of health; the second reference information satisfying a second preset condition includes one of:
the current time reaches a second preset time;
the current battery capacity is higher than the preset battery capacity.
15. A hand-held terminal, characterized in that it comprises a memory, a processor and a charging program of a battery stored on said memory and executable on said processor, said charging program of a battery realizing the steps of the method for charging a battery according to any one of claims 1 to 14 when executed by said processor.
16. A readable storage medium, characterized in that a computer readable storage medium has stored thereon a charging program of a battery, which when executed by a processor implements the steps of the method of charging a battery according to any one of claims 1 to 14.
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