CN112542624B - Charging method, charging device and storage medium - Google Patents
Charging method, charging device and storage medium Download PDFInfo
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- CN112542624B CN112542624B CN201910901654.4A CN201910901654A CN112542624B CN 112542624 B CN112542624 B CN 112542624B CN 201910901654 A CN201910901654 A CN 201910901654A CN 112542624 B CN112542624 B CN 112542624B
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The disclosure relates to a battery charging method, a battery charging device and a storage medium. The battery charging method comprises the following steps: acquiring the open-circuit voltage, the real-time current, the real-time voltage, the charge cut-off voltage and the charged cycle number of the battery; determining a charging current according to the open-circuit voltage, the real-time current and the real-time voltage, and determining a charging voltage according to the charging cut-off voltage and the charged cycle number; and charging the battery according to the charging current and the charging voltage. By the method and the device, the aging speed of the battery can be obviously reduced, and the service life of the battery can be prolonged.
Description
Technical Field
The present disclosure relates to the field of battery charging technologies, and in particular, to a charging method, a charging device, and a storage medium.
Background
With the continuous development of science and technology, portable intelligent devices such as mobile phones, tablet computers, notebook computers and the like gradually become an indispensable part in communication, entertainment, learning and work of people. The rechargeable battery is one of indispensable components for keeping the portable intelligent equipment normally operating.
With the increase of the use times of the portable intelligent device, the rechargeable battery mounted on the portable intelligent device has aging phenomena, such as the endurance time is gradually shortened.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a charging method, apparatus, and storage medium.
According to a first aspect of embodiments of the present disclosure, there is provided a battery charging method including: the open circuit voltage, the real-time current, the real-time voltage, the charge cut-off voltage of the battery, and the number of charged cycles of the battery are obtained. And determining the charging current according to the open-circuit voltage, the real-time current and the real-time voltage, and determining the charging voltage according to the charging cut-off voltage and the charged cycle number. And charging the battery according to the charging current and the charging voltage.
In one example, determining the charging current from the open circuit voltage, the real time current, and the real time voltage comprises: and determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And obtaining the health state of the battery according to the full charge capacity and the rated full charge capacity of the battery. Based on the state of health of the battery, a charging current of the battery is determined.
In one example, deriving a battery state of health from a full charge capacity, and a nominal full charge capacity of the battery, comprises: the full charge capacity of the battery at the optimum temperature is taken as the rated full charge capacity of the battery. The ratio between the full charge capacity and the rated full charge capacity is taken as the state of health of the battery.
In one example, determining a charging current for a battery based on a state of health of the battery comprises: and acquiring the charging multiplying power set by the user. And performing product operation on the charging multiplying power and the battery health state to obtain the charging current of the battery.
In one example, determining the charging voltage from the charge cutoff voltage and the number of charged cycles includes: and determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And acquiring the direct current impedance of the battery, and calculating the direct current impedance, the charged cycle number and the full charge capacity according to a first calculation function to obtain the charging voltage drop. And determining the charging voltage according to the charging cut-off voltage and the charging drop voltage.
In one example, determining the charge voltage from the charge cutoff voltage and the charge drop voltage comprises: and performing difference operation on the charging cut-off voltage and the charging drop voltage to obtain the charging voltage.
In one example, determining a full charge capacity of the battery from the open circuit voltage, the real time current, and the real time voltage comprises: and determining the resistance impedance of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And determining the current discharge depth of the battery according to the open-circuit voltage, the real-time current and the resistance impedance. And determining the residual capacity of the battery according to the current discharge depth. The method includes acquiring a starting capacity and a used capacity of the battery, and determining a full charge capacity of the battery based on the starting capacity, the used capacity, and a remaining capacity.
In one example, determining a resistive impedance of the battery based on the open circuit voltage, the real time current, and the real time voltage comprises: a voltage difference between the real-time voltage and the open-circuit voltage is determined. And taking the ratio between the voltage difference and the real-time current as the resistance impedance of the battery.
In one example, determining a present depth of discharge of the battery based on the open circuit voltage, the real time current, and the resistive impedance includes: and according to a second operation function, operating the open-circuit voltage and the product between the real-time current and the resistance impedance to obtain the current discharge depth of the battery.
In one example, determining a remaining capacity of the battery based on the current depth of discharge includes: and determining the difference of the discharge depth between the current discharge depth and the discharge depth at the time of the emptying capacity of the battery. The maximum capacity of the battery is obtained, and the product of the depth of discharge difference and the maximum capacity is determined as the remaining capacity of the battery.
In one example, determining a full charge capacity of a battery based on a starting capacity, a used capacity, and a remaining capacity includes: the sum of the initial capacity, the used capacity and the remaining capacity is taken as the full charge capacity of the battery.
According to a second aspect of the embodiments of the present disclosure, there is provided a battery charging device including: an acquisition unit configured to acquire an open-circuit voltage, a real-time current, and a real-time voltage of the battery, and acquire a charge cutoff voltage of the battery and a number of charged cycles of the battery. And the determining unit is configured to determine the charging current according to the open-circuit voltage, the real-time current and the real-time voltage, and determine the charging voltage according to the charging cut-off voltage and the number of charged cycles. A charging unit configured to charge the battery according to the charging current and the charging voltage.
In one example, the determination unit determines the charging current in the following manner: and determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And obtaining the health state of the battery according to the full charge capacity and the rated full charge capacity of the battery. Based on the state of health of the battery, a charging current of the battery is determined.
In one example, the determination unit derives the battery state of health from the full charge capacity, and the nominal full charge capacity of the battery, as follows: the full charge capacity of the battery at the optimum temperature is taken as the rated full charge capacity of the battery. The ratio between the full charge capacity and the rated full charge capacity is taken as the state of health of the battery.
In one example, the determination unit determines the charging current of the battery in the following manner: and acquiring the charging multiplying power set by the user. And performing product operation on the charging multiplying power and the battery health state to obtain the charging current of the battery.
In one example, the determination unit determines the charging voltage in the following manner: and determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And acquiring the direct current impedance of the battery, and calculating the direct current impedance, the charged cycle number and the full charge capacity according to a first calculation function to obtain the charging voltage drop. And determining the charging voltage according to the charging cut-off voltage and the charging drop voltage.
In one example, the determination unit determines the charging voltage in the following manner: and performing difference operation on the charging cut-off voltage and the charging drop voltage to obtain the charging voltage.
In an example, the obtaining unit is further configured to: the initial capacity as well as the used capacity of the battery is acquired. The determination unit determines the full charge capacity of the battery in the following manner: and determining the resistance impedance of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And determining the current discharge depth of the battery according to the open-circuit voltage, the real-time current and the resistance impedance. And determining the residual capacity of the battery according to the current discharge depth.
Based on the starting capacity, the used capacity, and the remaining capacity, a full charge capacity of the battery is determined.
In one example, the determination unit determines the resistance impedance of the battery as follows: a voltage difference between the real-time voltage and the open-circuit voltage is determined. And taking the ratio between the voltage difference and the real-time current as the resistance impedance of the battery.
In one example, the determination unit determines the current depth of discharge of the battery as follows: and according to a second operation function, operating the open-circuit voltage and the product between the real-time current and the resistance impedance to obtain the current discharge depth of the battery.
In an example, the obtaining unit is configured to: the maximum capacity of the battery is acquired. The determination unit determines the remaining capacity of the battery according to the current depth of discharge in the following manner: and determining the depth of discharge difference between the current depth of discharge and the depth of discharge at the time of emptying the battery according to the current depth of discharge. And determining the product of the depth of discharge difference and the maximum capacity as the residual capacity of the battery.
According to a third aspect of the present disclosure, there is provided a non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by a processor, perform any one of the aforementioned methods.
According to a fourth aspect of the present disclosure, there is provided a battery charging device comprising: a processor.
A memory for storing processor-executable instructions. Wherein the processor is configured to: the call instruction performs any of the methods described previously.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: by determining the charging current of the battery, determining the charging voltage of the battery, and charging the battery based on the determined charging current and the determined charging voltage, the aging speed of the battery can be reduced, and the service life of the battery can be prolonged.
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 accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flow chart illustrating a charging method according to an exemplary embodiment.
Fig. 2 is a flow chart illustrating a charging method according to an example embodiment.
Fig. 3 is a flow chart illustrating a charging method according to an example embodiment.
Fig. 4 is a flow chart illustrating a charging method according to an example embodiment.
Fig. 5 is a diagram illustrating a battery state of health effect relating to a charging method applying embodiments of the present disclosure, according to an example embodiment.
Fig. 6 is a block diagram illustrating a charging device according to an exemplary embodiment.
FIG. 7 is a block diagram illustrating an apparatus in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The technical solution of the exemplary embodiment of the present disclosure may be applied to an application scenario in which a battery mounted on a terminal is charged. In the exemplary embodiments described below, the terminal is sometimes also referred to as a smart terminal device. The terminal according to the present disclosure may be referred to as a Mobile terminal, and may also be referred to as User Equipment (UE), a Mobile Station (MS), and the like. A terminal is a device that provides voice and/or data connectivity to a user or a chip disposed within the device. Such as a handheld device, a vehicle-mounted device, etc., having a wireless connection function. Examples of terminals may include, for example: the Mobile terminal comprises a Mobile phone, a tablet computer, a notebook computer, a palm computer, Mobile Internet Devices (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote operation, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home and the like.
In order to delay the aging of the battery, the present disclosure provides a battery charging method, which charges the battery by adjusting the charging voltage and the charging current in real time, so as to reduce the aging speed of the battery and further prolong the service life of the battery.
Fig. 1 is a flowchart illustrating a battery charging method according to an exemplary embodiment, which is used in a terminal as shown in fig. 1, and includes steps S11 to S13.
In step S11, the open-circuit voltage, the real-time current, the real-time voltage, the charge cut-off voltage, and the number of charged cycles of the battery are acquired.
In step S12, the charging current is determined based on the open-circuit voltage, the real-time current, and the real-time voltage, and the charging voltage of the battery is determined based on the charge cutoff voltage and the number of charged cycles.
In step S13, the battery is charged with the charging current and the charging voltage.
The charging current and the charging voltage of the battery are determined through the open-circuit voltage, the real-time current and the real-time voltage of the battery, and the battery is charged based on the determined charging current and the determined charging voltage, so that the aging speed of the battery can be reduced, and the service life of the battery can be prolonged.
In the present disclosure, each step in the battery charging method is described in detail below.
In the present disclosure, a terminal voltage of the battery in an Open state may be referred to as an Open Circuit Voltage (OCV). I.e. the open circuit voltage of the battery is equal to the difference between the positive electrode potential and the negative electrode potential of the battery when the battery is open circuited. In the present disclosure, the real-time current I of the battery and the real-time voltage V of the battery may be obtained.
Fig. 2 is a flowchart illustrating the determination of the charging current according to an exemplary embodiment, as shown in fig. 2, including steps S121-S123.
In step S121, the full charge capacity of the battery is determined based on the open circuit voltage, the real-time current, and the real-time voltage.
In one embodiment, the present disclosure may determine the full charge capacity of the battery using the method illustrated in fig. 3. Fig. 3 is a flow chart illustrating a process for determining a full charge capacity of a battery according to an exemplary embodiment. As shown in fig. 3, determining the full charge capacity of the battery includes steps S1211-S1214.
In step S1211, a resistance impedance of the battery is determined according to the open circuit voltage, the real-time current, and the real-time voltage.
In the present disclosure, the variation of the current voltage, i.e., the voltage difference dV, can be determined according to the current real-time voltage and the open-circuit voltage. dV-OCV.
According to ohm's law, the ratio between the voltage difference and the real-time current can be used as the resistance impedance of the battery, i.e., the resistance impedance R ═ dV/I. I.e., R ═ V-OCV)/I.
In step S1212, a current depth of discharge of the battery is determined according to the open-circuit voltage, the real-time current, and the resistance impedance.
In the present disclosure, the depth of discharge of a battery may be a measure of the extent to which the battery is discharged. In one embodiment of the present disclosure, the current depth of discharge of the battery may be determined based on a predetermined operation function according to the open circuit voltage, the real-time current, and the resistance impedance. The operational function for making the present depth of discharge determination may be understood as a functional relationship between the present depth of discharge (DOD) of the battery and the open circuit voltage OCV and the product of the real time current I and the resistive impedance R. For example, the operational function may be a functional relationship between DOD and OCV + I × R. And obtaining the current depth of discharge DOD according to the functional relation between DOD and OCV + I R. In one embodiment, the functional relationship between DOD and OCV + ir may be DOD + ir. Namely, the value obtained by summing the OCV and I R is used as the current depth of discharge DOD.
In step S1213, the remaining capacity of the battery is determined according to the current depth of discharge.
In the present disclosure, determining the remaining capacity of the battery according to the current depth of discharge may be determined, for example, as follows:
and acquiring the maximum capacity of the battery, and determining the discharge depth difference between the current discharge depth and the discharge depth when the battery is emptied. The remaining capacity of the battery is determined based on the maximum capacity of the battery and a depth of discharge difference between the current depth of discharge and the depth of discharge at the time of the battery empty capacity.
Wherein, the maximum capacity of the battery can represent the loss condition of the battery after use. Generally, the maximum capacity of a battery may be expressed as a percentage of the current fully charged maximum capacity of the battery to the factory capacity of the battery. The maximum capacity of the battery varies with the use of the battery, in other words, the maximum capacity of the battery is a variation value. For example, the maximum capacity of the battery at the time of initial use is 90% of the factory capacity, and the maximum capacity of the battery becomes 80% of the factory capacity as the battery is used.
In the present disclosure, the difference between the current depth of discharge and the depth of discharge at the time of battery empty capacity is taken as the depth of discharge difference. And determining the product of the depth of discharge difference and the maximum capacity of the current battery as the residual capacity of the battery. For example, if the current depth of discharge is recorded as DOD1, the depth of discharge when the battery is empty is recorded as DOD2, the maximum capacity of the current battery is recorded as Qmax, and the remaining capacity of the battery is recorded as RM, then:
RM is (DOD1-DOD2) Qmax, from which the remaining capacity of the battery can be determined.
In step S1214, the start capacity and the used capacity of the battery are acquired, and the full charge capacity of the battery is determined based on the start capacity, the used capacity, and the remaining capacity.
In the present disclosure, the initial capacity of a battery may be understood as the capacity of the battery that is not discharged during use. The used capacity of a battery may be understood as the capacity that the battery consumes after a period of use. The used capacity of a battery can be determined by integrating the capacity during the use of the battery. The integral capacity can be determined according to the discharge time length of the battery and the discharge current in the corresponding discharge time length. The full charge capacity of the battery is understood to be the capacity of the battery to be fully charged during actual charging.
Based on the starting Capacity, the used Capacity, and the remaining Capacity, a Full Charge Capacity (FCC) of the battery is determined, which may be determined, for example, as follows:
the sum of the initial capacity of the battery, the used capacity of the battery, and the remaining capacity of the battery is taken as the full charge capacity of the battery.
For example, when the initial capacity of the battery is denoted as Qstart, the used capacity of the battery is denoted as PassedCharge, and the remaining capacity of the battery is denoted as RM, it can be obtained that:
FCC is Qstart + passadcharge + RM, and thus the full charge capacity of the battery can be obtained.
In an exemplary embodiment of the present disclosure, the state of health of the battery may be further obtained by determining the full charge capacity of the battery, and then the charging current of the battery may be determined, and the battery may be charged or the charging current of the battery may be updated based on the determined charging current.
In step S122, the battery state of health is obtained according to the full charge capacity of the battery and the rated full charge capacity of the battery.
In the present disclosure, the rated full charge capacity of the battery can be understood as the capacity of the battery that is fully charged at an ideal operating temperature, that is, the full charge capacity of the battery at an optimal temperature is taken as the rated full charge capacity of the battery. For example, the nominal full charge capacity of the battery may be the full charge capacity of the battery at 25 ℃ to charge the battery.
The state of health of the battery is derived from the full charge capacity of the battery, and the nominal full charge capacity of the battery, and may be determined, for example, by:
the ratio between the full charge capacity of the battery and the rated full charge capacity of the battery is taken as the battery state of health of the battery.
For example, when the battery capacity of the battery charged to full charge at 25 ℃ is taken as the rated full charge capacity of the battery, and the rated full charge capacity of the battery is recorded as FCC @25, the following results can be obtained: battery state of health-FCC/FCC @ 25. The battery state of health of the battery can thereby be obtained.
In step S123, the charging current of the battery is determined based on the state of health of the battery.
In the present disclosure, the charging current of the battery is determined based on the state of health of the battery, and may be determined, for example, as follows:
and acquiring the charging multiplying power set by a user, and performing product operation on the charging multiplying power and the battery health state to obtain the charging current of the battery.
Here, the charge rate is understood to be a current value required to charge the battery to its rated capacity for a predetermined time. The battery charging rate can be set based on actual requirements. For example, to achieve fast charging, a high-rate charge rate may be set within the battery charge rate range.
And performing product operation on the charging multiplying power and the battery health state to obtain current serving as actual charging current of the battery.
In the exemplary embodiment of the present disclosure, the charging current can be adjusted in real time by the acquired battery voltage V, battery current I, battery open-circuit voltage OCV, and the determined resistance impedance R, battery depth of discharge DOD, and battery full charge FCC, thereby achieving an extension of the battery service life.
Further, in the present disclosure, the charge cut-off voltage of the battery may be understood as the highest charge voltage set when the battery is charged. For example, a charge cutoff voltage of 4.8v is set for charging the battery, and when the voltage is reached, the charger automatically stops charging, i.e., the charging is terminated. The battery can be charged relatively fully by setting the charge cut-off voltage without overcharging, so that the service life of the battery is prolonged, and unnecessary danger caused by overcharging is prevented.
The charged cycle of the battery may be understood as one charge and discharge process of the battery, which is called one charged cycle of the battery, and further, the number of charged cycles of the battery may be understood as the number of cycles that the battery has been charged and discharged.
FIG. 4 is a flow chart illustrating determining a charging voltage according to an exemplary embodiment. As shown in fig. 4, determining the charging voltage includes step S124 and step S126.
In step S124, the full charge capacity FCC of the battery is determined based on the open-circuit voltage OCV, the real-time current I, and the real-time voltage V.
In step S125, a dc Resistance (DCR) of the battery is obtained, and the charging drop voltage is determined according to the dc Resistance, the number of charged cycles, and the full charge capacity.
In the present disclosure, as the battery gradually ages in use, in order to slow down the aging speed of the battery, the voltage of the battery needs to be reduced during the use of the battery, and then the charge cut-off voltage of the battery needs to be reduced. The reduced battery voltage to the battery may be referred to as a charge reduction voltage. Wherein the charge drop voltage can be determined from measured and empirical values according to practical experiments.
In the present disclosure, a preset operation function may be adopted to operate the dc impedance, the number of charged cycles, and the full charge capacity to obtain the charging drop voltage.
For convenience of description in this disclosure, the operation function for determining the charge drop voltage is referred to as a first operation function. The above-described operation function for determining the current depth of discharge of the battery is referred to as a second operation function.
The first operation function may be, for example, a functional relationship between the charge drop voltage and the dc impedance, the number of charged cycles, and the full charge capacity. For example, when the charging drop Voltage is Delta Voltage, the dc resistance is DCR, and the number of charged cycles is Cycle, the following functional relationship can be obtained:
delta Voltage F (Cycle, DCR, FCC), from which the charge drop Voltage of the battery can be determined.
In step S126, the charging voltage is determined from the charge cutoff voltage and the charge drop voltage.
In the present disclosure, when the charging voltage is determined according to the charging cut-off voltage and the charging drop voltage, for example, the charging voltage may be obtained by performing a difference operation between the charging cut-off voltage and the charging drop voltage.
For example, when the Charging Voltage is denoted as Charge Voltage and the Charging cut-off Voltage is denoted as Temp Charging Voltage, the following can be obtained:
the Charge Voltage-Delta Voltage can be determined from the Charge Voltage.
In the exemplary embodiment of the disclosure, the charging drop voltage of the battery is determined by acquiring the number of charged cycles of the battery, and the charging voltage of the battery can be determined in real time based on the charging drop voltage and the charging cut-off voltage, so that the condition of overcharge during charging along with the aging of the battery is avoided, the aging speed of the battery is reduced, and the service life of the battery is prolonged.
The present disclosure can reduce the aging speed of a battery and extend the service life of the battery by determining a charging current and a charging voltage by acquiring an open-circuit voltage, a real-time current, a battery initial capacity, a used capacity, a battery maximum capacity, etc. of the battery and charging the battery based on the determined charging current and the determined charging voltage.
Fig. 5 is a diagram illustrating a battery state of health effect relating to a charging method applying embodiments of the present disclosure, according to an example embodiment. As can be seen from fig. 5, the state of health of the battery according to the battery charging method provided by the present disclosure is better than the state of health of the battery according to the conventional charging method when the number of charged cycles of the battery reaches 500 times. In other words, the battery is charged by the charging method according to the embodiment of the disclosure, so that the aging speed of the battery can be reduced, and the service life of the battery can be prolonged.
Fig. 6 is a block diagram 100 illustrating a battery charging apparatus according to an exemplary embodiment. Referring to fig. 6, the apparatus includes an acquisition unit 101, a determination unit 102, and a charging unit 103.
An acquisition unit 101 configured to acquire an open circuit voltage, a real-time current, and a real-time voltage of the battery, and acquire a charge cutoff voltage of the battery and a number of charged cycles of the battery. A determination unit 102 configured to determine a charging current according to the open-circuit voltage, the real-time current, and the real-time voltage, and determine a charging voltage according to the charge cutoff voltage and the number of charged cycles. A charging unit 103 configured to charge the battery according to the charging current and the charging voltage.
In one example, the determining unit 102 determines the charging current as follows: and determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And obtaining the health state of the battery according to the full charge capacity and the rated full charge capacity of the battery. Based on the state of health of the battery, a charging current of the battery is determined.
In one example, the determination unit 102 derives the battery state of health from the full charge capacity, and the nominal full charge capacity of the battery, as follows: the full charge capacity of the battery at the optimum temperature is taken as the rated full charge capacity of the battery. The ratio between the full charge capacity and the rated full charge capacity is taken as the state of health of the battery.
In one example, the determining unit 102 determines the charging current of the battery as follows: and acquiring the charging multiplying power set by the user. And performing product operation on the charging multiplying power and the battery health state to obtain the charging current of the battery.
In one example, the determining unit 102 determines the charging voltage in the following manner: and determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And acquiring the direct current impedance of the battery, and calculating the direct current impedance, the charged cycle number and the full charge capacity according to a first calculation function to obtain the charging voltage drop. And determining the charging voltage according to the charging cut-off voltage and the charging drop voltage.
In one example, the determining unit 102 determines the charging voltage in the following manner: and performing difference operation on the charging cut-off voltage and the charging drop voltage to obtain the charging voltage.
In an example, the obtaining unit 101 is further configured to: the initial capacity as well as the used capacity of the battery is acquired.
The determination unit 102 determines the full charge capacity of the battery in the following manner: and determining the resistance impedance of the battery according to the open-circuit voltage, the real-time current and the real-time voltage. And determining the current discharge depth of the battery according to the open-circuit voltage, the real-time current and the resistance impedance. And determining the residual capacity of the battery according to the current discharge depth. Based on the starting capacity, the used capacity, and the remaining capacity, a full charge capacity of the battery is determined.
In one example, the determining unit 102 determines the resistance impedance of the battery as follows: a voltage difference between the real-time voltage and the open-circuit voltage is determined. And taking the ratio between the voltage difference and the real-time current as the resistance impedance of the battery.
In one example, the determining unit 102 determines the current depth of discharge of the battery as follows: and according to a second operation function, operating the open-circuit voltage and the product between the real-time current and the resistance impedance to obtain the current discharge depth of the battery.
In an example, the obtaining unit 101 is configured to: the maximum capacity of the battery is acquired. The determination unit 102 determines the remaining capacity of the battery from the current depth of discharge in the following manner: and determining the depth of discharge difference between the current depth of discharge and the depth of discharge at the time of emptying the battery according to the current depth of discharge. And determining the product of the depth of discharge difference and the maximum capacity as the residual capacity of the battery.
In one example, the determining unit 102 determines the full charge capacity of the battery as follows: the sum of the initial capacity, the used capacity and the remaining capacity is taken as the full charge capacity of the battery.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 7 is a block diagram illustrating an apparatus 700 for preventing false touches, according to an example embodiment. For example, the apparatus 700 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 7, apparatus 700 may include one or more of the following components: processing component 702, memory 704, power component 706, multimedia component 708, audio component 710, input/output (I/O) interface 712, sensor component 714, and communication component 717.
The processing component 702 generally controls overall operation of the device 700, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 702 may include one or more processors 720 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 702 may include one or more modules that facilitate interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.
The memory 704 is configured to store various types of data to support operation at the device 700. Examples of such data include instructions for any application or method operating on device 700, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 704 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 706 provides power to the various components of the device 700. The power components 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power supplies for the apparatus 700.
The multimedia component 708 includes a screen that provides an output interface between the device 700 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 708 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 700 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 710 is configured to output and/or input audio signals. For example, audio component 710 includes a Microphone (MIC) configured to receive external audio signals when apparatus 700 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 704 or transmitted via the communication component 717. In some embodiments, audio component 710 also includes a speaker for outputting audio signals.
The I/O interface 712 provides an interface between the processing component 702 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 714 includes one or more sensors for providing status assessment of various aspects of the apparatus 700. For example, sensor assembly 714 may detect an open/closed state of device 700, the relative positioning of components, such as a display and keypad of apparatus 700, the change in position of apparatus 700 or a component of apparatus 700, the presence or absence of user contact with apparatus 700, the orientation or acceleration/deceleration of apparatus 700, and the change in temperature of apparatus 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 714 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 717 is configured to facilitate communications between the apparatus 700 and other devices in a wired or wireless manner. The apparatus 700 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 717 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 717 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 704 comprising instructions, executable by the processor 720 of the device 700 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention 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 invention is limited only by the appended claims.
Claims (20)
1. A method of charging a battery, comprising:
acquiring the open-circuit voltage, the real-time current, the real-time voltage, the charge cut-off voltage and the charged cycle number of the battery;
determining a charging current according to the open-circuit voltage, the real-time current and the real-time voltage, and determining a charging voltage according to the charging cut-off voltage and the charged cycle number;
Charging the battery according to the charging current and the charging voltage;
determining a charging current according to the open circuit voltage, the real-time current and the real-time voltage comprises:
determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage;
obtaining the health state of the battery according to the full charge capacity and the rated full charge capacity of the battery;
determining a charging current for the battery based on the battery state of health;
determining a charging voltage according to the charge cutoff voltage and the number of charged cycles includes:
acquiring the direct current impedance of the battery, and calculating the direct current impedance, the charged cycle number and the full charge capacity according to a first operation function to obtain a charging voltage drop;
and determining the charging voltage according to the charging cut-off voltage and the charging drop voltage.
2. The battery charging method of claim 1, wherein said deriving a battery state of health from said full charge capacity and a nominal full charge capacity of said battery comprises:
taking a full charge capacity of the battery at an optimal temperature as a rated full charge capacity of the battery;
Taking a ratio between the full charge capacity and the rated full charge capacity as the battery state of health.
3. The battery charging method according to claim 1 or 2, wherein the determining the charging current of the battery based on the battery state of health comprises:
acquiring a charging rate set by a user;
and performing product operation on the charging multiplying power and the battery health state to obtain the charging current of the battery.
4. The battery charging method of claim 1, wherein determining a charging voltage based on the charge cutoff voltage and the charge drop voltage comprises:
and performing difference operation on the charging cut-off voltage and the charging drop voltage to obtain a charging voltage.
5. The battery charging method of claim 1, wherein said determining a full charge capacity of the battery based on the open circuit voltage, the real time current, and the real time voltage comprises:
determining the resistance impedance of the battery according to the open-circuit voltage, the real-time current and the real-time voltage;
determining the current discharge depth of the battery according to the open-circuit voltage, the real-time current and the resistance impedance;
Determining the residual capacity of the battery according to the current discharge depth;
the method comprises the steps of obtaining a starting capacity and a used capacity of the battery, and determining the full charge capacity of the battery based on the starting capacity, the used capacity and the residual capacity, wherein the starting capacity is the capacity of the battery which is not discharged in the using process.
6. The battery charging method of claim 5, wherein said determining a resistive impedance of the battery based on the open circuit voltage, the real time current, and the real time voltage comprises:
determining a voltage difference between the real-time voltage and the open-circuit voltage;
and taking the ratio between the voltage difference value and the real-time current as the resistance impedance of the battery.
7. The battery charging method of claim 5, wherein determining the present depth of discharge of the battery based on the open circuit voltage, the real time current, and the resistive impedance comprises:
and according to a second operation function, operating the open-circuit voltage and the product between the real-time current and the resistance impedance to obtain the current discharge depth of the battery.
8. The battery charging method of claim 5, wherein said determining the remaining capacity of the battery according to the current depth of discharge comprises:
determining a depth of discharge difference between the current depth of discharge and the depth of discharge at the battery dump capacity;
and acquiring the maximum capacity of the battery, and determining the product of the depth of discharge difference and the maximum capacity as the residual capacity of the battery.
9. The battery charging method of claim 5, wherein determining the full charge capacity of the battery based on the starting capacity, the used capacity, and the remaining capacity comprises:
taking a sum of the starting capacity, the used capacity, and the remaining capacity as a full charge capacity of the battery.
10. A battery charging apparatus, comprising:
an acquisition unit configured to acquire an open-circuit voltage, a real-time current, and a real-time voltage of a battery, and acquire a charge cutoff voltage of the battery and a number of charged cycles of the battery;
a determination unit configured to determine a charging current from the open-circuit voltage, the real-time current, and the real-time voltage, and determine a charging voltage from the charging cutoff voltage and the number of charged cycles;
A charging unit configured to charge the battery in accordance with the charging current and the charging voltage;
the determination unit determines the charging current in the following manner:
determining the full charge capacity of the battery according to the open-circuit voltage, the real-time current and the real-time voltage;
obtaining the health state of the battery according to the full charge capacity and the rated full charge capacity of the battery;
determining a charging current for the battery based on the battery state of health;
the determination unit determines the charging voltage in the following manner:
acquiring the direct current impedance of the battery, and calculating the direct current impedance, the charged cycle number and the full charge capacity according to a first operation function to obtain a charging voltage drop;
and determining the charging voltage according to the charging cut-off voltage and the charging drop voltage.
11. The battery charging apparatus according to claim 10, wherein the determination unit obtains the battery state of health from the full charge capacity and a rated full charge capacity of the battery by:
taking a full charge capacity of the battery at an optimal temperature as a rated full charge capacity of the battery;
Taking a ratio between the full charge capacity and the rated full charge capacity as the battery state of health.
12. The battery charging apparatus according to claim 10 or 11, wherein the determination unit determines the charging current of the battery in such a manner that:
acquiring a charging rate set by a user;
and performing product operation on the charging multiplying power and the battery health state to obtain the charging current of the battery.
13. The battery charging apparatus according to claim 10, wherein the determination unit determines the charging voltage in such a manner that:
and performing difference operation on the charging cut-off voltage and the charging drop voltage to obtain a charging voltage.
14. The battery charging apparatus according to claim 10, wherein the acquisition unit is further configured to:
acquiring the initial capacity and the used capacity of the battery;
the determination unit determines the full charge capacity of the battery as follows:
determining the resistance impedance of the battery according to the open-circuit voltage, the real-time current and the real-time voltage;
determining the current discharge depth of the battery according to the open-circuit voltage, the real-time current and the resistance impedance;
Determining the residual capacity of the battery according to the current discharge depth;
determining a full charge capacity of the battery based on the starting capacity, the used capacity, and the remaining capacity.
15. The battery charging apparatus according to claim 14, wherein the determination unit determines the resistance impedance of the battery by:
determining a voltage difference between the real-time voltage and the open-circuit voltage;
and taking the ratio between the voltage difference value and the real-time current as the resistance impedance of the battery.
16. The battery charging apparatus according to claim 14, wherein the determination unit determines the current depth of discharge of the battery by:
and according to a second operation function, operating the open-circuit voltage and the product between the real-time current and the resistance impedance to obtain the current discharge depth of the battery.
17. The battery charging apparatus according to claim 14, wherein the acquisition unit is configured to: acquiring the maximum capacity of the battery;
the determination unit determines the remaining capacity of the battery according to the current depth of discharge in the following manner:
According to the current discharge depth, determining a discharge depth difference value between the current discharge depth and the discharge depth when the battery is emptied;
determining a product between the depth of discharge difference and the maximum capacity as a remaining capacity of the battery.
18. The battery charging apparatus according to claim 14, wherein the determination unit determines the full charge capacity of the battery by:
taking a sum of the starting capacity, the used capacity, and the remaining capacity as a full charge capacity of the battery.
19. A battery charging apparatus, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: performing the battery charging method of any one of claims 1-9.
20. A non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by a processor, perform the battery charging method of any of claims 1-9.
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| CN114640170B (en) * | 2021-12-31 | 2022-11-29 | 深圳市驰普科达科技有限公司 | Outdoor power supply assembly, outdoor power supply and solar panel control method and device thereof |
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