CN111157907B - Detection method and device, charging method and device, electronic device and storage medium - Google Patents
Detection method and device, charging method and device, electronic device and storage medium Download PDFInfo
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- CN111157907B CN111157907B CN201911394460.6A CN201911394460A CN111157907B CN 111157907 B CN111157907 B CN 111157907B CN 201911394460 A CN201911394460 A CN 201911394460A CN 111157907 B CN111157907 B CN 111157907B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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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 method and a device for detecting internal resistance of a battery, a charging method and a device, an electronic device and a storage medium, wherein the method for detecting the internal resistance of the battery comprises the following steps: acquiring a first depth of discharge of a battery, wherein the first depth of discharge is an initial depth of discharge of the battery during detection; determining a second depth of discharge according to the first depth of discharge and the rate of change of the battery power in the charging and discharging processes; acquiring a first open-circuit voltage according to the second discharge depth and a first mapping relation, wherein the first mapping relation is the mapping relation between the open-circuit voltage and the discharge depth; and determining the internal resistance of the battery according to the first open-circuit voltage, a first current and a first voltage, wherein the first current is the charging and discharging current of the battery at the second depth of discharge, and the first voltage is the charging and discharging voltage of the battery at the second depth of discharge.
Description
Technical Field
The present disclosure relates to the field of charging technologies, and in particular, to a method and an apparatus for detecting internal resistance of a battery, a method and an apparatus for charging, an electronic device, and a storage medium.
Background
The internal resistance (i.e., the dc impedance) of a lithium ion battery is one of important parameters in the charging and discharging processes of the lithium ion battery, and the internal resistance of the battery mainly includes the inherent resistance and the polarization impedance of the battery. The polarization impedance of the battery is different at different stages of the charging and discharging process of the battery, so that the internal resistance of the battery is different at different stages of the charging and discharging process. At present, the internal resistance of the battery cannot be detected in real time in the related art, and therefore, a method for detecting the internal resistance of the battery is urgently needed.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a method and an apparatus for detecting internal resistance of a battery, an electronic device, and a storage medium, so as to implement real-time detection of internal resistance of a battery.
According to a first aspect of the present disclosure, there is provided a method of detecting an internal resistance of a battery, the method comprising:
acquiring a first depth of discharge of a battery, wherein the first depth of discharge is an initial depth of discharge of the battery during detection;
determining a second depth of discharge according to the first depth of discharge and the rate of change of the battery power in the charging and discharging processes;
acquiring a first open-circuit voltage according to the second discharge depth and a first mapping relation, wherein the first mapping relation is the mapping relation between the open-circuit voltage and the discharge depth;
and determining the internal resistance of the battery according to the first open-circuit voltage, the first current and the first voltage, wherein the first current is the charging and discharging current of the battery at a second depth of discharge, and the second voltage is the charging and discharging voltage of the battery at the second depth of discharge.
According to a second aspect of the present disclosure, there is provided a detection device of an internal resistance of a battery, including:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a first depth of discharge of a battery, and the first depth of discharge is the initial depth of discharge of the battery during detection;
the first determining module is used for determining a second depth of discharge according to the first depth of discharge and the change rate of the electric quantity of the battery in the charging and discharging processes;
the second obtaining module is used for obtaining a first open-circuit voltage according to the second discharge depth and a first mapping relation, wherein the first mapping relation is the mapping relation between the open-circuit voltage and the discharge depth;
and the second determining module is used for determining the internal resistance of the battery according to the first open-circuit voltage, the first current and the first voltage, wherein the first current is the charging and discharging current of the battery at the second depth of discharge, and the first voltage is the charging and discharging voltage of the battery at the second depth of discharge.
According to a third aspect of the present disclosure, there is provided an electronic device comprising
A processor; and
a memory having computer readable instructions stored thereon which, when executed by the processor, implement a method according to any of the above.
According to a fourth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method according to any one of the above.
According to the method for detecting the internal resistance of the battery, provided by the embodiment of the disclosure, the second depth of discharge is determined through the first depth of discharge and the change rate of the electric quantity of the battery in the charging and discharging processes, the first open-circuit voltage is obtained in the first mapping relation according to the second depth of discharge, and the internal resistance of the battery is determined according to the first open-circuit voltage, the first current and the first voltage. The real-time detection of the internal resistance of the battery in the charging and discharging process is realized, so that the charging and discharging are guided by the internal resistance of the battery.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a flowchart of a method for detecting internal resistance of a battery according to an exemplary embodiment of the present disclosure;
fig. 2 is a flowchart of another method for detecting internal resistance of a battery according to an exemplary embodiment of the disclosure;
fig. 3 is a block diagram of a device for detecting internal resistance of a battery according to an exemplary embodiment of the present disclosure;
fig. 4 is a flowchart of a charging method provided in an exemplary embodiment of the present disclosure;
fig. 5 is a block diagram of a charging device provided in an exemplary embodiment of the present disclosure;
fig. 6 is a schematic diagram of a first electronic device provided in an exemplary embodiment of the present disclosure;
fig. 7 is a schematic diagram of a first computer-readable storage medium according to an exemplary embodiment of the disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, devices, steps, and so forth. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in the form of software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.
The internal resistance of the battery, namely the direct current impedance of the battery is one of important parameters in the charging and discharging process of the battery, and has important guiding significance for the charging process and the discharging process of the battery. For example, the charging parameters can be adjusted in real time according to the internal resistance of the battery during charging, so that quick charging is realized. The internal resistance of the battery mainly includes the battery intrinsic resistance and the polarization resistance. In the process of charging and discharging the battery, the polarization impedance can be changed continuously due to the polarization phenomenon of the battery, so that the internal resistance of the battery is also changed continuously in the process of charging and discharging.
The exemplary embodiment of the present disclosure first provides a method for detecting internal resistance of a battery, as shown in fig. 1, the method for detecting internal resistance of a battery may include the steps of:
step S110, acquiring a first depth of discharge of the battery, wherein the first depth of discharge is the initial depth of discharge of the battery during detection;
step S130, determining a second depth of discharge according to the first depth of discharge and the change rate of the battery electric quantity in the charging and discharging process;
step S150, acquiring a first open-circuit voltage according to the second discharge depth and a first mapping relation, wherein the first mapping relation is the mapping relation between the open-circuit voltage and the discharge depth;
step S170, determining an internal resistance of the battery according to the first open-circuit voltage, the first current and the first voltage, where the first current is a charging and discharging current of the battery at the second depth of discharge, and the second voltage is a charging and discharging voltage of the battery at the second depth of discharge.
According to the method for detecting the internal resistance of the battery, provided by the embodiment of the disclosure, the second depth of discharge is determined through the first depth of discharge and the change rate of the electric quantity of the battery in the charging and discharging process, the first open-circuit voltage is obtained in the first mapping relation according to the second depth of discharge, and the internal resistance of the battery is determined according to the first open-circuit voltage, the first current and the first voltage. The real-time detection of the internal resistance of the battery in the charging and discharging process is realized, so that the charging and discharging are guided by the internal resistance of the battery. The internal resistance of the battery can be continuously updated in the whole life cycle of the battery.
Further, as shown in fig. 2, the method for detecting the internal resistance of the battery provided in the embodiment of the present disclosure may further include:
step S210, a first mapping relationship is established, where the first mapping relationship is a mapping relationship between an open-circuit voltage and a depth of discharge.
For the determined battery core, the corresponding relation between the open-circuit voltage and the discharge depth is fixed in the life cycle of the battery, so that the corresponding relation between the open-circuit voltage and the discharge depth can be obtained through testing in the testing stage.
In step S230, the rate of change of the electric quantity of the battery during the charging and discharging process is determined.
The charge quantity in the battery can be changed in the charging and discharging process of the battery, the variation quantity of the battery charge can be calculated in one charging or discharging process, and the change rate of the battery electric quantity can be obtained.
The following will explain in detail the steps of the detection method for the internal resistance of the battery provided by the present disclosure:
in step S210, a first mapping relationship may be established, the first mapping relationship including a mapping relationship of an open-circuit voltage and a depth of discharge.
In a possible embodiment, establishing the first mapping relationship may be implemented as follows: charging and discharging the battery by using a first preset current value, and acquiring a chemical identifier (chemical ID) of the battery in the charging and discharging process of the battery; and determining the corresponding relation between the open-circuit voltage and the discharge depth according to the chemical identification of the battery.
The first preset current value is smaller than the discharging current of the battery during working. In the discharging process, when the lithium ion battery is discharged through the current of the first preset current value, the battery is considered to be in a stable state, and the discharging voltage during discharging is the open-circuit voltage. The discharge can be stabilized by the current value of the first preset current, the electric quantity of the battery is discharged from 100% to 0 (namely, the discharge depth is from 0 to 100%), and the relation between the discharge voltage and the discharge depth is recorded, so that the first mapping relation in the discharge process is obtained.
In the charging process, the battery is charged through the current of the first preset current, the battery is considered to be in a stable state, and the voltage of the battery during charging is the open-circuit voltage. The charging can be stabilized by the current value of the first preset current, the electric quantity of the battery is charged from 0 to 100% (namely, the depth of discharge is from 100% to 0), and the relationship between the voltage of the battery and the depth of discharge is recorded, so that the first mapping relationship in the charging process is obtained.
The first mapping relationship may be expressed in a graph form, a table form, or the like, and during use, the first mapping relationship may be stored in the storage device, and when the battery internal resistance is detected, the stored first mapping relationship may be called.
In step S110, a first depth of discharge of the battery may be acquired, the first depth of discharge being an initial depth of discharge of the battery.
The initial depth of discharge refers to the depth of discharge of the battery at the beginning of the primary internal resistance detection, and the value of the first depth of discharge may be any value from 0 to 100%. For example, when the battery is fully charged, the detection of the internal resistance of the battery is started during the discharging process, and the first depth of discharge is zero. Or when the battery capacity is zero, starting to detect the internal resistance of the battery in the charging process of the battery, wherein the first depth of discharge is 100 percent.
In a possible embodiment, step S110 can be implemented as follows: and reading the first depth of discharge, wherein the first depth of discharge is the depth of discharge of the battery detected in the testing stage.
Wherein the first depth of discharge may be an initial depth of discharge of the battery. For example, the first depth of discharge may be a depth of discharge of the battery obtained by an external device detection when the battery is loaded into the electronic device. The first depth of discharge is written to the electronic device while the battery is loaded into the electronic device. And calling the first discharge depth in the first charge-discharge process of the battery and in the charge or discharge process of the battery.
In a possible embodiment, step S110 can be implemented as follows: when the electric quantity change of the battery is smaller than a first threshold value in the charging and discharging process of the battery, acquiring the current charging and discharging voltage as an open-circuit voltage; and determining a first depth of discharge according to the open-circuit voltage and the first mapping relation.
When the battery is discharged at a low current, the battery is in a stable state, and the discharge voltage of the battery is considered as an open-circuit voltage. For example, the continuous current of the battery is less than 20mA, or dV/dt is less than 5uV/s, and the discharge voltage at the moment can be used as the open-circuit voltage of the battery; or when the electronic device is turned off or in standby, the measured voltage can be used as an open-circuit voltage. This approach can be used to correct the open circuit voltage during battery charging and discharging.
After the open-circuit voltage is corrected, the discharge depth of the battery can be further corrected. After the corrected open circuit voltage is determined, a corrected first depth of discharge is determined from the first mapping.
In practical applications, the first depth of discharge may also be obtained by other means, for example, the full-charge state and the zero-charge state of the battery are easy to detect, so that the detection of the internal resistance of the battery during the discharging process may be started when the battery is fully charged, and the first depth of discharge is zero. Or when the electric quantity of the battery is zero, starting to detect the internal resistance of the battery in the charging process of the battery, wherein the first depth of discharge is 100 percent.
In step S230, a rate of change of the battery charge during the charge and discharge may be determined.
In a possible embodiment, step S230 may be implemented as follows: obtaining current in the charging and discharging process of the battery, and performing charge integration to obtain the electric quantity variation of the battery; and determining the electric quantity change rate according to the electric quantity change quantity and the rated charge quantity of the battery.
In the charging process (or the discharging process), the charging (discharging) current is detected in real time, and the charging (discharging) current is integrated to obtain the electric quantity variation delta Q of the battery in the charging (discharging) process.
ΔQ＝∫idt
Wherein, Delta Q is the quantity of change of electric quantity, QMAXM is the rate of change of the charge, and t is the charging time. The variation of the battery in the charging process is a positive value, and the electric quantity variation rate of the battery is also a positive value; the variation of the battery in the discharging process is a negative value, and the electric quantity variation rate of the battery is also a negative value.
In step S130, a second depth of discharge may be determined according to the first depth of discharge and the rate of change of the battery capacity during charging and discharging.
Here, the first depth of discharge DOD1 is obtained through step S110, and the rate of change m of the battery power is determined through step S230. During the charging (or discharging) process, the second depth of discharge DOD2 may be calculated by the following formula:
DOD2＝DOD1-m
in step S150, a first open-circuit voltage may be obtained according to the second depth of discharge and a first mapping relationship, where the first mapping relationship is a mapping relationship between the open-circuit voltage and the depth of discharge.
The first mapping relation can be stored in the electronic device, and the first mapping relation is called to determine the first open-circuit voltage when the internal resistance of the battery is detected. For example, when the first mapping relationship is in a table form, the table of the first mapping relationship may be queried to obtain the first open-circuit voltage. When the first mapping relation is a function of the open-circuit voltage with respect to the depth of discharge, the second depth of discharge may be substituted into the function f (dod) to calculate the first open-circuit voltage.
In step S170, an internal resistance of the battery is determined according to the first open-circuit voltage, a first current and a first voltage, the first current is a charge-discharge current of the battery at the second depth of discharge, and the first voltage is a voltage of two poles of the battery at the second depth of discharge.
When detecting the internal resistance of the battery, the detection needs to be performed during the dynamic process of charging or discharging the battery. During the process of charging and discharging the battery from the first depth of discharge to the second depth of discharge, the charging and discharging voltage and current of the battery also change, so the internal resistance of the battery can be calculated through the current and voltage when the second depth of discharge is reached during the charging and discharging process.
During the charging process of the battery, the charging current and the charging voltage of the battery (namely the voltage applied to two poles of the battery) are obtained, and the internal resistance of the battery is calculated by the following formula:
wherein, R is the internal resistance of the battery, V is the charging voltage, OCV is the first open-circuit voltage, and I is the charging current.
In the discharging process of the battery, the discharging current and the discharging voltage of the battery are obtained, and the internal resistance of the battery is calculated through the following formula:
wherein, R is the internal resistance of the battery, V is the discharge voltage, OCV is the first open-circuit voltage, and I is the discharge current.
According to the method for detecting the internal resistance of the battery, provided by the embodiment of the disclosure, the second depth of discharge is determined through the first depth of discharge and the change rate of the electric quantity of the battery in the charging and discharging processes, the first open-circuit voltage is obtained in the first mapping relation according to the second depth of discharge, and the internal resistance of the battery is determined according to the first open-circuit voltage, the first current and the first voltage. The real-time detection of the internal resistance of the battery in the charging and discharging process is realized, so that the charging and discharging are guided by the internal resistance of the battery.
The method for detecting the internal resistance of the battery provided by the embodiment of the disclosure updates the internal resistance of the battery in the charging and discharging processes respectively, generally speaking, the internal resistance value cannot be increased too much suddenly in the same charging and discharging process, and even two adjacent charging and discharging processes cannot fluctuate greatly. Therefore, the magnitude of the internal resistance calculated during the discharging process can be used to guide the charging process, since the charging process needs to be designed according to the aging state of the battery.
Or the method for detecting the internal resistance of the battery provided by the embodiment of the disclosure can also be used for estimating the residual electric quantity in the discharging process according to the internal resistance value calculated in the charging process.
The internal resistance value can be used as the corresponding index of the aging state of the battery, generally, the internal resistance value increases after the battery ages, so that the SOH of the battery and the capacity attenuation condition of the battery can be reflected after the real-time internal resistance of the battery is detected.
It should be noted that although the steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that the steps must be performed in this particular order or that all of the depicted steps must be performed to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
The embodiment of the present disclosure further provides a device for detecting internal resistance of a battery, as shown in fig. 3, the device 300 for detecting internal resistance of a battery includes:
a first obtaining module 310, configured to obtain a first depth of discharge of a battery, where the first depth of discharge is an initial depth of discharge of the battery;
a first determining module 320, configured to determine a second depth of discharge according to the first depth of discharge and a rate of change of battery power during charging and discharging;
a second obtaining module 330, configured to obtain a first open-circuit voltage according to a second depth of discharge and a first mapping relationship, where the first mapping relationship is a mapping relationship between the open-circuit voltage and the depth of discharge;
the second determining module 340 is configured to determine an internal resistance of the battery according to the first open-circuit voltage, the first current, and the first voltage, where the first current is a charging and discharging current of the battery at the second depth of discharge, and the second voltage is a charging and discharging voltage of the battery at the second depth of discharge.
The device for detecting the internal resistance of the battery according to the embodiment of the disclosure determines the second depth of discharge through the first depth of discharge and the rate of change of the battery capacity during the charging and discharging processes, obtains the first open-circuit voltage in the first mapping relationship according to the second depth of discharge, and determines the internal resistance of the battery according to the first open-circuit voltage, the first current, and the first voltage. The real-time detection of the internal resistance of the battery in the charging and discharging process is realized, so that the charging and discharging are guided by the internal resistance of the battery.
Further, the device for detecting the internal resistance of the battery provided by the embodiment of the present disclosure may further include:
and the third determining module is used for determining the change rate of the battery electric quantity in the charging and discharging process.
The device comprises an establishing module, a storage module and a control module, wherein the establishing module is used for establishing a first mapping relation, and the first mapping relation comprises a mapping relation of battery open-circuit voltage and discharge depth.
In a possible implementation, the third determining module may include:
the first acquisition unit is used for acquiring current in the charging and discharging processes of the battery and performing charge integration to obtain the electric quantity variation of the battery;
the first determining unit determines the electric quantity change rate according to the charge change quantity and the rated charge quantity of the battery, wherein the rated charge quantity is the maximum charge quantity allowed to be stored by the battery.
In a possible implementation, the first obtaining module may include:
and the reading unit is used for reading a first depth of discharge, and the first depth of discharge is the depth of discharge of the battery detected in the testing stage.
In a possible implementation, the first obtaining module may include:
the second acquisition unit is used for acquiring the current charge-discharge voltage as the open-circuit voltage when the electric quantity change of the battery is smaller than a first threshold value in the charge-discharge process of the battery;
and the second determining unit is used for determining the first depth of discharge according to the open-circuit voltage and the first mapping relation.
In a possible embodiment, the establishing module may include:
the third acquisition unit is used for charging and discharging the battery according to the first preset current value and acquiring a battery chemical identifier in the charging and discharging process of the battery;
and the third determining unit is used for determining the corresponding relation between the open-circuit voltage and the discharge depth according to the battery chemical identification.
The details of the detection device module for detecting the internal resistance of each battery are already described in detail in the corresponding virtual object transmission method, and therefore are not described herein again.
It should be noted that although in the above detailed description several modules or units of the detection means of the internal resistance of the battery are mentioned, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
The embodiment of the present disclosure further provides a charging method, as shown in fig. 4, the charging method may include the following steps:
step S410, detecting the internal resistance of the battery in the first discharging process.
The battery internal resistance in the first discharging process can be detected and obtained through the detection method of the battery internal resistance. The internal resistance can be embodied in the form of an internal resistance-depth of discharge curve. The first discharge process may be any discharge process of the battery.
Step S430, in a first charging process, the battery is charged according to the internal resistance, the first charging process is later than the first discharging process, and the first charging process and the first discharging process are adjacent.
During the use of the battery, the internal resistance of the battery is gradually increased due to aging of the battery and the like. When the internal resistances of the batteries are different in the charging process, parameters such as charging current and charging voltage to be input are also different, so that different circuits and voltages can be selected to charge the batteries according to the internal resistances of the batteries in different stages, and the charging speed and the charging efficiency of the batteries are improved.
Generally speaking, in the same charge and discharge process, the internal resistance value cannot be suddenly increased too much, and even two adjacent charge and discharge processes cannot have large fluctuation. Therefore, the magnitude of the internal resistance calculated during the discharging process can be used to guide the charging process, since the charging process needs to be designed according to the aging state of the battery.
According to the charging method provided by the embodiment of the disclosure, the internal resistance of the battery is detected in real time in the charging process, and the parameters of the battery during charging are determined according to the internal resistance of the battery during previous discharging, so that the charging speed and the charging efficiency of the battery can be improved.
The exemplary embodiment of the present disclosure also provides a charging device 500, as shown in fig. 5, the charging device 500 includes:
a first detection module 510, configured to detect an internal resistance curve of the battery in a first discharging process;
the first charging module 520 is configured to charge the battery according to the internal resistance curve in a first charging process, where the first charging process is later than the first discharging process, and the first charging process is adjacent to the first discharging process.
In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 600 according to such an embodiment of the invention is described below with reference to fig. 6. The electronic device 600 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 6, the electronic device 600 is in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: the at least one processing unit 610, the at least one memory unit 620, a bus 630 connecting different system components (including the memory unit 620 and the processing unit 610), and a display unit 640.
Wherein the storage unit stores program code that is executable by the processing unit 610 such that the processing unit 610 performs the steps according to various exemplary embodiments of the present invention as described in the above section "exemplary method" of the present specification.
The storage unit 620 may include readable media in the form of volatile storage units, such as a random access memory unit (RAM)6201 and/or a cache storage unit 6202, and may further include a read-only memory unit (ROM) 6203.
The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 600 may also communicate with one or more external devices 670 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 600, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 600 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 650. Also, the electronic device 600 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 660. As shown, the network adapter 640 communicates with the other modules of the electronic device 600 via the bus 630. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
In an exemplary embodiment of the present disclosure, there is also provided a computer readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above section "exemplary method" of this description, when said program product is run on the terminal device.
Referring to fig. 7, a program product 700 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In situations involving remote computing devices, the remote computing devices may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to external computing devices (e.g., through the internet using an internet service provider).
Furthermore, the above-described drawings are only schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (10)
1. A charging method, characterized in that the charging method comprises:
detecting the internal resistance of the battery in a first discharging process;
charging the battery according to the internal resistance in a first charging process, wherein the first charging process is later than the first discharging process, and the first charging process is adjacent to the first discharging process;
wherein the detecting the internal resistance of the battery in the first discharging process includes:
acquiring a first depth of discharge of a battery, wherein the first depth of discharge is an initial depth of discharge of the battery during detection;
determining a second depth of discharge according to the first depth of discharge and the rate of change of the battery electric quantity in the charging and discharging processes;
acquiring a first open-circuit voltage according to the second discharge depth and a first mapping relation, wherein the first mapping relation is the mapping relation between the open-circuit voltage and the discharge depth;
and determining the internal resistance of the battery according to the first open-circuit voltage, a first current and a first voltage, wherein the first current is the charging and discharging current of the battery at the second depth of discharge, and the first voltage is the charging and discharging voltage of the battery at the second depth of discharge.
2. The charging method according to claim 1, wherein the detecting the internal resistance of the battery in the first discharging process further comprises:
and determining the change rate of the battery electric quantity in the charging and discharging process.
3. The method of charging according to claim 2, wherein said determining a rate of change of charge of said battery during charging and discharging comprises:
obtaining current in the charging and discharging process of the battery, and performing charge integration to obtain the electric quantity variation of the battery;
and determining the change rate of the electric quantity according to the electric quantity change quantity and the rated charge quantity of the battery, wherein the rated charge quantity is the maximum charge quantity allowed to be stored by the battery.
4. The method of charging of claim 1, wherein said obtaining a first depth of discharge of the battery comprises:
and reading the first depth of discharge, wherein the first depth of discharge is a preset battery depth of discharge.
5. The method of charging of claim 1, wherein said obtaining a first depth of discharge of the battery comprises:
when the electric quantity change of the battery is smaller than a first threshold value in the charging and discharging process of the battery, acquiring the current charging and discharging voltage as an open-circuit voltage;
and determining the first depth of discharge according to the open-circuit voltage and the first mapping relation.
6. The charging method according to claim 1, wherein the detecting the internal resistance of the battery in the first discharging process further comprises:
and establishing the first mapping relation, wherein the first mapping relation comprises a mapping relation between the open-circuit voltage of the battery and the depth of discharge.
7. The charging method of claim 6, wherein said establishing the first mapping relationship comprises:
charging and discharging the battery by using a first preset current value to obtain a battery chemical identifier in the charging and discharging process of the battery;
and determining the corresponding relation between the open-circuit voltage and the discharge depth according to the battery chemical identification.
8. A charging device, characterized in that the charging device comprises:
the first detection module is used for detecting an internal resistance curve of the battery in a first discharging process;
the first charging module is used for charging the battery according to the internal resistance curve in a first charging process, wherein the first charging process is later than the first discharging process, and the first charging process is adjacent to the first discharging process;
wherein the first detection module comprises:
the first acquisition module is used for acquiring a first depth of discharge of a battery, wherein the first depth of discharge is the initial depth of discharge of the battery during detection;
the first determining module is used for determining a second depth of discharge according to the first depth of discharge and the change rate of the electric quantity of the battery in the charging and discharging processes;
the second obtaining module is used for obtaining a first open-circuit voltage according to the second discharge depth and a first mapping relation, wherein the first mapping relation is the mapping relation between the open-circuit voltage and the discharge depth;
and the second determining module is used for determining the internal resistance of the battery according to the first open-circuit voltage, the first current and the first voltage, wherein the first current is the charging and discharging current of the battery at the second depth of discharge, and the first voltage is the charging and discharging voltage of the battery at the second depth of discharge.
9. An electronic device, comprising
A processor; and
a memory having computer readable instructions stored thereon which, when executed by the processor, implement the method of any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR980012775A (en) * | 1996-07-04 | 1998-04-30 | 김영귀 | How to control over-discharge battery charge by measuring internal resistance of battery |
| JP2001110459A (en) * | 1999-10-06 | 2001-04-20 | Nec Mobile Energy Kk | Battery pack having capacity correcting function |
| CN101192757A (en) * | 2006-11-29 | 2008-06-04 | 松下电器产业株式会社 | Charging system, charging device and battery pack |
| TW200945726A (en) * | 2008-04-30 | 2009-11-01 | Univ Nat Taiwan Science Tech | Apparatus of smart charging and charging method thereof |
| CN101682092A (en) * | 2008-01-24 | 2010-03-24 | 丰田自动车株式会社 | Battery system, vehicle, and battery mounted device |
| CN102064589A (en) * | 2011-02-16 | 2011-05-18 | 江苏技术师范学院 | Charging device of valve-regulated lead-acid accumulator |
| CN103051034A (en) * | 2013-01-24 | 2013-04-17 | 河南环宇赛尔新能源科技有限公司 | Equalizing charging device and control method |
| CN204928276U (en) * | 2015-09-08 | 2015-12-30 | 西安特锐德智能充电科技有限公司 | Measurable quantity power lithium internal resistance of cell's charging device |
| CN106324506A (en) * | 2015-06-17 | 2017-01-11 | 炬才微电子（深圳）有限公司 | Embedded equipment battery test method, device and system |
| CN106463801A (en) * | 2014-04-01 | 2017-02-22 | 密执安州立大学董事会 | Real-time battery thermal management for electric vehicles |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004260905A (en) * | 2003-02-25 | 2004-09-16 | Yanmar Co Ltd | Hybrid system |
| JP2008199723A (en) * | 2007-02-09 | 2008-08-28 | Railway Technical Res Inst | Residual capacity estimation unit of battery |
| JP5298095B2 (en) * | 2010-09-30 | 2013-09-25 | 株式会社日立製作所 | Secondary battery system |
| CN203745616U (en) * | 2013-12-31 | 2014-07-30 | 双新电器(郑州)制造有限公司 | Maintenance-free lead-acid storage battery nondestructive testing instrument |
| JP2019003803A (en) * | 2017-06-14 | 2019-01-10 | 株式会社Ｇｓユアサ | Power storage device |
| CN107359378B (en) * | 2017-06-30 | 2019-08-09 | 宁德时代新能源科技股份有限公司 | Battery charging method, device and equipment |
| CN108279385A (en) * | 2018-01-26 | 2018-07-13 | 深圳市道通智能航空技术有限公司 | State of charge evaluation method, device and the electronic equipment of battery |
| CN110176795A (en) * | 2019-05-30 | 2019-08-27 | Oppo广东移动通信有限公司 | Charging method and device, charging system, electronic equipment, storage medium |
| CN110400987B (en) * | 2019-07-03 | 2020-09-29 | 华人运通(江苏)技术有限公司 | Battery charging and discharging current limiting method, battery management system and storage medium |
| CN110568373A (en) * | 2019-07-29 | 2019-12-13 | 深圳市科陆电子科技股份有限公司 | Lithium battery health state evaluation method, system, terminal and storage medium |
| CN111142030B (en) * | 2019-12-30 | 2022-02-25 | Oppo广东移动通信有限公司 | Method, device and equipment for detecting internal short-circuit current and readable storage medium |
-
2019
- 2019-12-30 CN CN201911394460.6A patent/CN111157907B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR980012775A (en) * | 1996-07-04 | 1998-04-30 | 김영귀 | How to control over-discharge battery charge by measuring internal resistance of battery |
| JP2001110459A (en) * | 1999-10-06 | 2001-04-20 | Nec Mobile Energy Kk | Battery pack having capacity correcting function |
| CN101192757A (en) * | 2006-11-29 | 2008-06-04 | 松下电器产业株式会社 | Charging system, charging device and battery pack |
| CN101682092A (en) * | 2008-01-24 | 2010-03-24 | 丰田自动车株式会社 | Battery system, vehicle, and battery mounted device |
| TW200945726A (en) * | 2008-04-30 | 2009-11-01 | Univ Nat Taiwan Science Tech | Apparatus of smart charging and charging method thereof |
| CN102064589A (en) * | 2011-02-16 | 2011-05-18 | 江苏技术师范学院 | Charging device of valve-regulated lead-acid accumulator |
| CN103051034A (en) * | 2013-01-24 | 2013-04-17 | 河南环宇赛尔新能源科技有限公司 | Equalizing charging device and control method |
| CN106463801A (en) * | 2014-04-01 | 2017-02-22 | 密执安州立大学董事会 | Real-time battery thermal management for electric vehicles |
| CN106324506A (en) * | 2015-06-17 | 2017-01-11 | 炬才微电子（深圳）有限公司 | Embedded equipment battery test method, device and system |
| CN204928276U (en) * | 2015-09-08 | 2015-12-30 | 西安特锐德智能充电科技有限公司 | Measurable quantity power lithium internal resistance of cell's charging device |
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| Publication number | Publication date |
|---|---|
| CN111157907A (en) | 2020-05-15 |
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