CN109818089B - Battery current limiting method and device - Google Patents
Battery current limiting method and device Download PDFInfo
- Publication number
- CN109818089B CN109818089B CN201910054259.7A CN201910054259A CN109818089B CN 109818089 B CN109818089 B CN 109818089B CN 201910054259 A CN201910054259 A CN 201910054259A CN 109818089 B CN109818089 B CN 109818089B
- Authority
- CN
- China
- Prior art keywords
- battery
- current
- threshold
- value
- residual capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the technical field of batteries, and provides a battery current limiting method and a device, wherein the method comprises the following steps: when the battery is in a discharging state, judging the relation between the current residual capacity of the battery and a preset first threshold and a second threshold; if the current residual capacity is smaller than the first threshold and larger than a second threshold, performing a first current limiting operation on the battery; wherein the first threshold is greater than the second threshold; and if the current residual capacity is smaller than the second threshold value, performing second current limiting operation on the battery. According to the embodiment of the invention, when the current residual capacity of the battery is smaller than the first threshold and larger than the second threshold, the first current limiting operation is carried out on the battery, and when the current residual capacity of the battery is smaller than the second threshold, the second current limiting operation is carried out on the battery, so that the current limiting operation can be carried out on the battery according to the residual capacity of the battery in real time, the discharge with constant large current can not be carried out, and the safety and the reliability of the use of the battery are improved.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a battery current limiting method and device.
Background
At present, electric equipment in various industries (intelligent home, aviation, aerospace, traffic and other technical fields) can be powered by batteries, and lithium ion batteries are widely applied due to the advantages of long cycle life, high energy density, wide working temperature and the like.
At present, when a battery is charged or discharged with constant large current in the use process, the service life of the battery can be shortened, and a more serious person can directly scrap the battery or generate dangerous events in the use process, so that the use safety and reliability of the battery are reduced.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a battery current limiting method, which aims to solve the problems of low safety and low reliability of the existing battery.
A first aspect of an embodiment of the present invention provides a battery current limiting method, including:
when the battery is in a discharging state, judging the relation between the current residual capacity of the battery and a preset first threshold value and a preset second threshold value;
if the current residual capacity is smaller than the first threshold and larger than the second threshold, performing a first current limiting operation on the battery; wherein the first threshold is greater than the second threshold;
and if the current residual capacity is smaller than the second threshold value, performing second current limiting operation on the battery.
In one embodiment, if the current remaining power is less than the second threshold, performing a second current limiting operation on the battery, including:
and if the current residual capacity is smaller than the second threshold value, setting the discharge current of the battery to be zero.
In one embodiment, if the current remaining power is less than the first threshold and greater than the second threshold, performing a first current limiting operation on the battery, including:
if the current residual electric quantity is smaller than the first threshold and larger than the second threshold, acquiring a prestored maximum discharge current value;
and calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
In one embodiment, the calculation formula for calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of battery discharge current is as follows:
wherein, the
The current value for discharging the battery, IallowAnd λ is a pre-stored maximum discharge current value, and the λ is a control proportionality coefficient of the battery discharge current.
In one embodiment, calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of battery discharge current comprises:
calculating a control proportionality coefficient of the battery discharging current according to the current residual electric quantity, a first threshold value and a second threshold value;
and calculating the current value of the battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
In one embodiment, the calculation formula for calculating the control proportionality coefficient of the battery discharge current according to the current remaining capacity, the first threshold and the second threshold is as follows:
wherein, the lambda is the control proportionality coefficient of the battery discharge current, and the SOC is the current residual capacity and SOC of the battery1Is a first threshold value, SOC2Is the second threshold.
In one embodiment, the battery current limiting method further comprises:
when the battery is in a charging state, judging the relation between the current residual capacity of the battery and a preset third threshold and a preset fourth threshold;
if the current residual capacity is larger than the third threshold and smaller than the fourth threshold, performing a third current limiting operation on the battery according to a control proportionality coefficient of the charging current and a pre-stored maximum charging current value; wherein the third threshold is less than the fourth threshold;
and if the current residual capacity is larger than the fourth threshold value, setting the charging current of the battery to be zero.
A second aspect of an embodiment of the present invention provides a battery current limiting apparatus, including:
the first judgment module is used for judging the relation between the current residual capacity of the battery and a preset first threshold and a second threshold when the battery is in a discharging state;
the first current limiting module is used for performing first current limiting operation on the battery if the current residual electric quantity is smaller than the first threshold and larger than the second threshold; wherein the first threshold is greater than the second threshold;
and the second current limiting module is used for performing second current limiting operation on the battery if the current residual capacity is smaller than the second threshold value.
A third aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method when executing the computer program.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium, in which a computer program is stored, which, when executed by a processor, implements the steps of the above-described method.
In the embodiment of the invention, when the battery is in a discharging state, the relation between the current residual capacity of the battery and a preset first threshold and a preset second threshold is judged; if the current residual capacity is smaller than the first threshold and larger than the second threshold, performing a first current limiting operation on the battery; wherein the first threshold is greater than the second threshold; and if the current residual capacity is smaller than the second threshold value, performing second current limiting operation on the battery. The current residual capacity of the battery is smaller than the first threshold and larger than the second threshold, the first current limiting operation is carried out on the battery, and the second current limiting operation is carried out on the battery when the current residual capacity of the battery is smaller than the second threshold, so that the current limiting operation can be carried out on the battery in real time according to the residual capacity of the battery, the discharging with constant large current is avoided, and the use safety and reliability of the battery are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating a battery current limiting method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a battery current limiting method according to a second embodiment of the present invention;
fig. 3 is a schematic flow chart of a battery current limiting method according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a current limiting device for a battery according to a fourth embodiment of the present invention
Fig. 5 is a schematic structural diagram of a terminal device according to a fifth embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It should be understood that the sequence numbers of the steps in the method embodiments described below do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation on the implementation process of each embodiment.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Example one
The battery current limiting method provided by the embodiment of the invention can be applied to terminal equipment containing a battery or an intelligent battery, and as shown in fig. 1, the battery current limiting method comprises the following steps:
step S101, when the battery is in a discharging state, judging the relation between the current residual capacity of the battery and a preset first threshold value and a preset second threshold value.
In the embodiment of the present invention, the battery may be a single battery, a battery pack, or a battery pack. When the battery is detected to be in a discharging state, acquiring the relation between the current residual capacity of the battery and a preset and stored first threshold value and second threshold value. The relationship between the current remaining capacity of the battery and the first threshold and the second threshold may be a magnitude relationship between the current remaining capacity of the battery and the first threshold and the second threshold, respectively.
Step S102, if the current residual capacity is smaller than the first threshold and larger than the second threshold, performing a first current limiting operation on the battery; wherein the first threshold is greater than the second threshold.
In the embodiment of the present invention, the preset and stored first threshold is greater than the second threshold, and when the current remaining capacity of the battery is less than the first threshold and greater than the second threshold, that is, when the current remaining capacity of the battery is between the first threshold and the second threshold, performing the first current limiting operation on the battery may be to limit a current discharged from the battery, so that the discharging is slow.
In one embodiment, the first current limiting operation on the battery may be to control a discharging current of the battery at a certain proportionality coefficient such that the discharging current per unit time of the battery is reduced.
Step S103, if the current remaining power is smaller than the second threshold, performing a second current limiting operation on the battery.
In the embodiment of the invention, when the current residual capacity of the battery is less than the second threshold value and indicates that the residual current of the battery is not much, the second current limiting operation is directly performed on the battery, and the second current limiting operation is performed after the first current limiting operation.
In one embodiment, if the current remaining power is less than the second threshold, performing a second current limiting operation on the battery, including: and if the current residual capacity is smaller than the second threshold value, setting the discharge current of the battery to be zero. The second current limiting operation may be to directly set the discharge current of the battery to zero.
Therefore, in the embodiment of the invention, because the current residual capacity of the battery is smaller than the first threshold and larger than the second threshold, the first current limiting operation is performed on the battery, and when the current residual capacity of the battery is smaller than the second threshold, the second current limiting operation is performed on the battery, the current limiting operation can be performed on the battery according to the residual capacity of the battery in real time, so that the battery cannot be discharged with constant large current, and the safety and reliability of the use of the battery are improved.
Example two
This embodiment is a further description of the first embodiment, and the same or similar places of this embodiment as the first embodiment may specifically refer to the related description of the first embodiment, which is not repeated herein, and as shown in fig. 2, the step S102 further includes:
in step S201, if the current remaining power is smaller than the first threshold and larger than the second threshold, a pre-stored maximum discharging current value is obtained.
In the embodiment of the invention, when the current residual capacity of the battery is smaller than the first threshold and larger than the second threshold, namely the current residual capacity of the battery is between the first threshold and the second threshold, the pre-stored maximum discharge current value is acquired.
And step S202, calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
In the embodiment of the invention, the current value of battery discharge can be calculated according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current, so that the battery can be controlled to discharge according to the calculated current value of the battery discharge. The control proportionality coefficient of the battery discharge current may be a pre-stored fixed control proportionality coefficient, or may also be a control proportionality coefficient for calculating the battery discharge current according to the current remaining capacity of the battery.
In one embodiment, the calculation formula for calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of battery discharge current is as follows:
wherein, the
The current value for discharging the battery, IallowAnd λ is a pre-stored maximum discharge current value, and the λ is a control proportionality coefficient of the battery discharge current.
In one embodiment, calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of battery discharge current comprises: calculating a control proportionality coefficient of the battery discharging current according to the current residual electric quantity, a first threshold value and a second threshold value; and calculating the current value of the battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
In one embodiment, the calculation formula for calculating the control proportionality coefficient of the battery discharge current according to the current remaining capacity, the first threshold and the second threshold is as follows:
wherein, the lambda is the control proportionality coefficient of the battery discharge current, and the SOC is the current residual capacity and SOC of the battery1Is a first threshold value, SOC2Is the second threshold. If the current residual capacity of the battery is equal to the first threshold value, the control proportion coefficient of the battery discharging current is 1; and if the current residual capacity of the battery is equal to the second threshold value, the control proportionality coefficient of the battery discharging current is 0.
As can be seen, in the embodiment of the present invention, since the first current limiting operation is performed on the battery when the current remaining power of the battery is less than the first threshold and greater than the second threshold, and the second current limiting operation is performed on the battery when the current remaining power of the battery is less than the second threshold, the current limiting operation can be performed on the battery according to the remaining power of the battery in real time, so that the battery is not discharged with a constant large current. And the sudden change of the current can be effectively avoided through the two set thresholds, the discharging current is gradually limited when the current residual capacity of the battery reaches the first threshold, and the current limiting value reaches 100 percent when the current residual capacity of the battery reaches the second threshold, namely the discharging allowable current is 0, so that the use safety and reliability of the battery can be improved.
EXAMPLE III
The present embodiment is further described in the first embodiment and the second embodiment, and the same or similar places to the first embodiment or the second embodiment may specifically refer to the related description of the first embodiment or the second embodiment, which is not repeated herein, and as shown in fig. 3, the battery current limiting method further includes:
step S301, when the battery is in a charging state, judging the relation between the current residual capacity of the battery and a preset third threshold and a preset fourth threshold.
In the embodiment of the invention, when the battery is detected to be in the charging state, the relation between the current residual capacity of the battery and the preset and stored third threshold and fourth threshold is obtained. The relationship between the current remaining capacity of the battery and the third threshold and the fourth threshold may be a magnitude relationship between the current remaining capacity of the battery and the third threshold and the fourth threshold, respectively.
Step S302, if the current remaining capacity is greater than the third threshold and smaller than the fourth threshold, performing a third current limiting operation on the battery according to a control proportionality coefficient of the charging current and a pre-stored maximum charging current value; wherein the third threshold is less than the fourth threshold.
In the embodiment of the present invention, the preset and stored third threshold is smaller than the fourth threshold, and when the current remaining power of the battery is greater than the third threshold and smaller than the fourth threshold, that is, when the current remaining power of the battery is between the third threshold and the fourth threshold, the battery is charged to perform the third current limiting operation. Specifically, the third current limiting operation on the battery charging may be to limit the current of the battery charging so that the current charging is slow.
In one embodiment, the third current limiting operation may be performed on the battery by controlling the charging current of the battery with a certain charging proportionality coefficient, so that the charging current per unit time of the battery is reduced. The control proportionality coefficient of the battery charging current may be a fixed control proportionality coefficient stored in advance, or the control proportionality coefficient of the battery charging current may be calculated by calculating the control proportionality coefficient of the battery charging current from the current remaining capacity, the first threshold value and the second threshold value.
Step S303, if the current remaining power is greater than the fourth threshold, setting the charging current of the battery to zero.
In the embodiment of the present invention, when the current remaining capacity of the battery is greater than the fourth threshold, it indicates that the remaining capacity of the battery is sufficient, and this directly performs the fourth current limiting operation on the battery, where the fourth current limiting operation may be to set the charging current of the battery to zero.
Therefore, in the embodiment of the application, since the third current limiting operation is performed on the battery when the current remaining capacity of the battery is greater than the third threshold and less than the fourth threshold, and the fourth current limiting operation is performed on the battery when the current remaining capacity of the battery is greater than the fourth threshold, the current limiting operation can be performed on the battery in real time according to the remaining capacity of the battery, so that a constant large current cannot be charged, and the safety and reliability of the use of the battery are improved.
Example four
An embodiment of the present invention provides a battery current limiting device, which can be applied to a terminal device including a battery or an intelligent battery, and is configured to perform the method steps in the first embodiment, the second embodiment, or the third embodiment, for convenience of description, only relevant portions of the present invention are shown, as shown in fig. 4, where the battery current limiting device 400 includes:
the first judging module 401 is configured to, when a battery is in a discharging state, judge a relationship between a current remaining power of the battery and a preset first threshold and a preset second threshold;
a first current limiting module 402, configured to perform a first current limiting operation on the battery if the current remaining power is less than the first threshold and greater than the second threshold; wherein the first threshold is greater than the second threshold;
in one embodiment, the first current limiting module 402 includes:
the obtaining unit is used for obtaining a pre-stored maximum discharging current value if the current residual capacity is smaller than the first threshold and larger than the second threshold;
and the calculating unit is used for calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
In one embodiment, the calculation formula of the calculation unit is:
wherein, the
The current value for discharging the battery, IallowAnd λ is a pre-stored maximum discharge current value, and the λ is a control proportionality coefficient of the battery discharge current.
In one embodiment, the calculation unit comprises:
the first calculating subunit is used for calculating a control proportionality coefficient of the battery discharging current according to the current remaining capacity, a first threshold and a second threshold;
and the second calculating subunit is used for calculating the current value of the battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
In one embodiment, the calculation formula of the first calculation subunit is:
wherein, the lambda is the control proportionality coefficient of the battery discharge current, and the SOC is the current residual capacity and SOC of the battery1Is a first threshold value, SOC2Is the second threshold.
A second current limiting module 403, configured to perform a second current limiting operation on the battery if the current remaining power is smaller than the second threshold.
In an embodiment, the second current limiting module 403 is specifically configured to set the discharging current of the battery to zero if the current remaining power is smaller than the second threshold.
In one embodiment, the battery current limiting device 400 further includes:
a second determining module 404, configured to determine, when a battery is in a charging state, a relationship between a current remaining power of the battery and a preset third threshold and a preset fourth threshold;
a third current limiting module 405, configured to perform a third current limiting operation on the battery according to a control scaling factor of the charging current and a pre-stored maximum charging current value if the current remaining power is greater than the third threshold and smaller than the fourth threshold; wherein the third threshold is less than the fourth threshold;
a fourth current limiting module 406, configured to set the charging current of the battery to zero if the current remaining power is greater than the fourth threshold.
Therefore, in the embodiment of the invention, because the current residual capacity of the battery is smaller than the first threshold and larger than the second threshold, the first current limiting operation is performed on the battery, and when the current residual capacity of the battery is smaller than the second threshold, the second current limiting operation is performed on the battery, the current limiting operation can be performed on the battery according to the residual capacity of the battery in real time, so that the battery cannot be discharged with constant large current, and the safety and reliability of the use of the battery are improved.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. The terminal device 500 includes: a processor 501, a memory 502 and a computer program 503 stored in the memory 502 and executable on the processor 501. The processor 501 executes the computer program 503 to implement the steps of the battery current limiting method embodiments, such as the method steps of the first embodiment, the method steps of the second embodiment, and/or the method steps of the third embodiment.
Illustratively, the computer program 503 may be divided into one or more units/modules, which are stored in the memory 502 and executed by the processor 501 to implement the present invention. The one or more units/modules may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 503 in the terminal device 500. For example, the computer program 503 may be divided into a first determining module, a first current limiting module, a second determining module, a third current limiting module, a fourth current limiting module, and the like, and specific functions of each module are described in the fourth embodiment, which is not described herein again.
The terminal device 500 may be a terminal device including a battery, a smart battery, or a management device of the battery. The terminal device 500 may include, but is not limited to, a processor 501 and a memory 502. Those skilled in the art will appreciate that fig. 5 is only an example of the terminal device 500 and does not constitute a limitation to the terminal device 500, and may include more or less components than those shown, or combine some components, or different components, for example, the terminal device 500 may further include an input-output device, a network access device, a bus, etc.
The Processor 501 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 502 may be an internal storage unit of the terminal device 500, such as a hard disk or a memory of the terminal device 500. The memory 502 may also be an external storage device of the terminal device 500, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 500. Further, the memory 502 may include both an internal storage unit and an external storage device of the terminal device 500. The memory 502 is used to store the computer programs and other programs and data required by the terminal device 500. The memory 502 described above may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the terminal device may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the above-described modules or units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the embodiments of the method when the computer program is executed by a processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the computer readable medium described above may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media excludes electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A method of limiting current in a battery, comprising:
when the battery is in a discharging state, judging the relation between the current residual capacity of the battery and a preset first threshold value and a preset second threshold value;
if the current residual capacity is smaller than the first threshold and larger than the second threshold, acquiring a pre-stored maximum discharge current value, and calculating a battery discharge current value according to the maximum discharge current value and a control proportional coefficient of the battery discharge current; wherein the first threshold is greater than the second threshold;
and if the current residual capacity is smaller than the second threshold value, setting the discharge current of the battery to be zero.
2. The battery current limiting method according to claim 1, wherein a calculation formula for calculating the battery discharging current value according to the maximum discharging current value and the battery discharging current control proportionality coefficient is as follows:
wherein, the
The current value for discharging the battery, IallowAnd λ is a pre-stored maximum discharge current value, and the λ is a control proportionality coefficient of the battery discharge current.
3. The battery current limiting method of claim 2, wherein calculating the battery discharging current value according to the maximum discharging current value and a control proportionality coefficient of battery discharging current comprises:
calculating a control proportionality coefficient of the battery discharging current according to the current residual electric quantity, a first threshold value and a second threshold value;
and calculating the current value of the battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
4. The battery current limiting method according to claim 3, wherein a calculation formula for calculating the control proportionality coefficient of the battery discharge current according to the current remaining capacity, the first threshold and the second threshold is as follows:
wherein, the lambda is the control proportionality coefficient of the battery discharge current, and the SOC is the current residual capacity and SOC of the battery1Is a first threshold value, SOC2Is the second threshold.
5. The battery current limiting method according to any one of claims 1 to 4, further comprising:
when the battery is in a charging state, judging the relation between the current residual capacity of the battery and a preset third threshold and a preset fourth threshold;
if the current residual capacity is larger than the third threshold and smaller than the fourth threshold, performing a third current limiting operation on the battery according to a control proportionality coefficient of the charging current and a pre-stored maximum charging current value; wherein the third threshold is less than the fourth threshold;
and if the current residual capacity is larger than the fourth threshold value, setting the charging current of the battery to be zero.
6. A battery current limiting device, comprising:
the first judgment module is used for judging the relation between the current residual capacity of the battery and a preset first threshold and a second threshold when the battery is in a discharging state;
the first current limiting module is used for performing first current limiting operation on the battery if the current residual electric quantity is smaller than the first threshold and larger than the second threshold; wherein the first threshold is greater than the second threshold;
the second current limiting module is used for setting the discharging current of the battery to be zero if the current residual electric quantity is smaller than the second threshold value;
the first current limiting module includes:
the obtaining unit is used for obtaining a pre-stored maximum discharging current value if the current residual capacity is smaller than the first threshold and larger than the second threshold;
and the calculating unit is used for calculating the current value of battery discharge according to the maximum discharge current value and the control proportionality coefficient of the battery discharge current.
7. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 5 when executing the computer program.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054259.7A CN109818089B (en) | 2019-01-21 | 2019-01-21 | Battery current limiting method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054259.7A CN109818089B (en) | 2019-01-21 | 2019-01-21 | Battery current limiting method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109818089A CN109818089A (en) | 2019-05-28 |
| CN109818089B true CN109818089B (en) | 2021-03-19 |
Family
ID=66604794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910054259.7A Active CN109818089B (en) | 2019-01-21 | 2019-01-21 | Battery current limiting method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109818089B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406547B (en) * | 2020-03-17 | 2023-05-05 | 比亚迪股份有限公司 | Method, device, equipment and vehicle for determining state of current detection device |
| CN113119797A (en) * | 2021-04-22 | 2021-07-16 | 国网广汇(上海)电动汽车服务有限公司 | Over-discharge prevention protection method, system and device for rechargeable battery assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329019A (en) * | 2016-08-29 | 2017-01-11 | 北京小米移动软件有限公司 | Charging method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4952031B2 (en) * | 2006-04-14 | 2012-06-13 | トヨタ自動車株式会社 | Power supply device, input / output restriction setting method in power supply device, vehicle and control method thereof |
| JP5931705B2 (en) * | 2012-11-28 | 2016-06-08 | 三菱重工業株式会社 | Charge / discharge control device, charge / discharge control system, charge / discharge control method, and program |
| CN104833922B (en) * | 2014-12-01 | 2017-12-08 | 北汽福田汽车股份有限公司 | The computational methods and device of battery charging and discharging current limit |
-
2019
- 2019-01-21 CN CN201910054259.7A patent/CN109818089B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329019A (en) * | 2016-08-29 | 2017-01-11 | 北京小米移动软件有限公司 | Charging method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109818089A (en) | 2019-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110011374B (en) | Control method and system for battery charging and discharging current and terminal equipment | |
| CN110364775B (en) | Battery charging control method, battery charging control device and terminal | |
| CN111016724B (en) | Charging pile self-adaptive power distribution method, system and equipment | |
| CN109616712B (en) | Control method and system for battery charging and discharging current and terminal equipment | |
| CN109888420B (en) | Charging method and device for lithium ion battery pack and terminal equipment | |
| CN109818396B (en) | Charging method and device for lithium ion battery pack and terminal equipment | |
| CN109818089B (en) | Battery current limiting method and device | |
| CN115932605A (en) | Method and device for correcting residual electric quantity of energy storage battery and battery management system | |
| CN113472037A (en) | Battery pack balancing method, battery pack balancing device and battery management system | |
| CN109991543B (en) | Method and device for acquiring residual electric quantity of battery pack and terminal equipment | |
| CN112737032A (en) | Control method and control device for battery charging and terminal | |
| CN112272908B (en) | Charging method, electronic device, and storage medium | |
| CN111864291A (en) | Control method and device for lithium battery auxiliary heating system | |
| CN110031766B (en) | Battery allowable power estimation method and module, and battery power management method and system | |
| CN109687485B (en) | Power distribution method and system of energy storage system and terminal equipment | |
| CN112039064B (en) | Control method based on power supply system and related device | |
| CN111953043B (en) | Battery management method, device and equipment | |
| CN108963350B (en) | Battery protection method and device | |
| CN113682180A (en) | Input power limited charging method, device, electronic equipment and storage medium | |
| CN109786877B (en) | Charging method and device for lithium ion battery pack and terminal equipment | |
| CN110061663B (en) | Current limiting method and system of motor and terminal equipment | |
| CN113507154B (en) | Charging method and device, charger and electronic equipment | |
| CN116154896A (en) | Battery balance control method and device of energy storage system, terminal and storage medium | |
| CN115113077A (en) | Method for determining available window value of battery SOC and related device | |
| CN112803524B (en) | Battery charging control method, device and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 518000 Guangdong Province, Baoan District, Baoan District, Xin'an Street, Xingdong Community 67 District, Zhongliang Chuangzhi Factory District, 903A Applicant after: Shenzhen Mammoth Electric Technology Co., Ltd. Address before: 518000 Food Experience Hall, 67 District Xingdong Community, Xin'an Street, Baoan District, Shenzhen City, Guangdong Province (1) 201 Applicant before: Shenzhen Flow Chain Technology Co., Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |