CN110138028B - Battery management system, battery charging and discharging control method thereof and terminal equipment - Google Patents
Battery management system, battery charging and discharging control method thereof and terminal equipment Download PDFInfo
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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
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- H02J2007/0067—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention is suitable for the technical field of batteries, and provides a battery management system, a battery charging and discharging control method and terminal equipment thereof, wherein the battery management system comprises a battery charging and discharging system, a battery charging and discharging system and a battery charging and discharging system, wherein the battery charging and discharging system comprises a battery charging and discharging system, a battery charging and discharging system and a battery charging and discharging system; acquiring the change trend of the environmental temperature according to the charge and discharge starting time; setting a charge-discharge time length and a charge-discharge power curve according to the change trend of the environmental temperature; and outputting a charging and discharging current according to the charging and discharging time length and the charging and discharging power curve, and controlling the charging and discharging of the battery based on the charging and discharging current. The battery management system has the advantages that the time parameters are introduced into the battery management system, the temperature change trend is determined according to the charge and discharge start time, the charge and discharge power is adjusted under the condition of the temperature change trend, the charge and discharge efficiency can be effectively improved, the intelligent degree of the battery management system is improved by introducing the historical data parameters, the battery temperature is effectively controlled, the battery temperature is prevented from fluctuating violently, and the problems that the charge and discharge efficiency is influenced and the battery temperature is overhigh due to the fact that the battery pack temperature fluctuates violently in the conventional battery management system are solved.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a battery management system, a battery charging and discharging control method thereof and terminal equipment.
Background
A Battery Management System (BMS) is a System for managing a Battery, and generally has a function of measuring a Battery voltage to prevent (avoid) occurrence of abnormal situations such as overdischarge, overcharge, and excessive Battery temperature of the Battery. At present, most of core control strategies of battery management systems are based on real-time traditional variables such as temperature, voltage and current and are used as variable input of system operation, and system real-time control is carried out based on a fixed function model.
In summary, the current battery management system has the problems that the charging and discharging efficiency is affected and the battery temperature is too high due to the severe fluctuation of the temperature of the battery pack.
Disclosure of Invention
In view of this, embodiments of the present invention provide a battery management system, a battery charging and discharging control method thereof, and a terminal device, so as to solve the problem that the current battery management system affects the charging and discharging efficiency and causes an excessively high battery temperature due to a severe fluctuation of the battery pack temperature.
A first aspect of the present invention provides a battery charge/discharge control method, including:
acquiring the charge and discharge starting time of a battery;
acquiring the change trend of the ambient temperature according to the charge and discharge starting time;
setting a charging and discharging time length and a charging and discharging power curve according to the environment temperature change trend;
and outputting a charging and discharging current according to the charging and discharging time length and the charging and discharging power curve, and controlling charging and discharging of the battery based on the charging and discharging current.
A second aspect of the present invention provides a battery management system comprising:
the time acquisition module is used for acquiring the charge and discharge starting time of the battery;
the trend acquisition module is used for acquiring the change trend of the environmental temperature according to the charge and discharge starting time;
the setting module is used for setting a charging and discharging time length and a charging and discharging power curve according to the environment temperature change trend;
and the current output module is used for outputting charge and discharge current according to the charge and discharge duration and the charge and discharge power curve and controlling the charge and discharge of the battery based on the charge and discharge current.
A third aspect of the present invention provides a terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring the charge and discharge starting time of a battery;
acquiring the change trend of the ambient temperature according to the charge and discharge starting time;
setting a charging and discharging time length and a charging and discharging power curve according to the environment temperature change trend;
and outputting a charging and discharging current according to the charging and discharging time length and the charging and discharging power curve, and controlling charging and discharging of the battery based on the charging and discharging current.
A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, performs the steps of:
acquiring the charge and discharge starting time of a battery;
acquiring the change trend of the ambient temperature according to the charge and discharge starting time;
setting a charging and discharging time length and a charging and discharging power curve according to the environment temperature change trend;
and outputting a charging and discharging current according to the charging and discharging time length and the charging and discharging power curve, and controlling charging and discharging of the battery based on the charging and discharging current.
According to the battery management system, the battery charging and discharging control method and the terminal equipment, the time parameters are introduced into the battery management system, the temperature change trend is determined according to the charging and discharging starting time, the charging and discharging power is adjusted under the condition of the temperature change trend, the charging and discharging efficiency can be effectively improved, the intelligent degree of the battery management system is improved by introducing the historical data parameters, the battery temperature is effectively controlled, the battery temperature is prevented from being fluctuated severely, and the problems that the charging and discharging efficiency is influenced and the battery temperature is overhigh in the conventional battery management system due to the fact that the temperature of a battery pack fluctuates severely are effectively solved.
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 an implementation of a battery charging and discharging control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operational safety margin of a battery pack according to one embodiment;
fig. 3 is a schematic flow chart of an implementation of step S102 according to a second embodiment of the present invention;
fig. 4 is a schematic flow chart of an implementation of step S103 according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a battery management system according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of the trend acquisition module 102 according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a setting module 103 according to a sixth embodiment of the present invention;
fig. 8 is a schematic diagram of a terminal device provided in the seventh 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, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a battery charging and discharging control method, which specifically includes:
step S101: the charge and discharge start time of the battery is acquired.
In specific application, the temperature change of the battery management system in the charging and discharging process is determined by introducing the concepts of seasons, months, morning, afternoon, evening and the like, so that the battery management system can adaptively adjust charging and discharging parameters according to the temperature change, and the charging and discharging control of the battery is realized.
In specific application, the charging and discharging starting time of the battery for starting charging and discharging is obtained in real time, and the current time information such as season, month, time period (morning, afternoon or evening) and the like is determined according to the charging and discharging starting time.
In a specific application, the battery management system monitors whether the battery has a charging operation and a discharging operation in real time, and when the battery management system monitors that the battery starts to be charged or discharged, the charging and discharging start time is determined by reading the time of a system clock.
Step S102: and acquiring the change trend of the ambient temperature according to the charge and discharge starting time.
In a specific application, after the charge and discharge start time at which the charge and discharge of the battery are started is determined, which season, which month, and whether the current time is the morning, afternoon, or evening of the day are determined according to the charge and discharge start time. The environmental temperature variation trend of the battery in the charging and discharging process can be determined according to historical temperature data in different seasons, months and periods.
In a specific application, the trend of temperature change is different due to different seasons, months and periods, for example, the temperature change in the morning period of spring is smaller than that in the morning period of summer. Therefore, by acquiring a large amount of historical temperature data of different seasons, different months and different periods, the temperature change trend of each season, each month and each period is determined according to the historical temperature data. And storing the variation trend of each season, each month and each period in association with the corresponding time.
In a specific application, the charging or discharging time of the battery can be estimated according to the residual capacity of the battery, so that the time period required for charging or discharging can be determined, the temperature change trend of the battery in the charging or discharging time period can be determined according to the charging and discharging starting time of the battery, the season, month and time period in which the charging or discharging operation is located can be determined according to the charging and discharging starting time, and the corresponding temperature change trend can be obtained from a database in which the time and the temperature change trend are stored.
For example, if the charging and discharging time is 1 month, 12 days and 8:00 am, the temperature change trend corresponding to spring-1 month-8:00 am is searched from the database.
Step S103: and setting a charge-discharge time length and a charge-discharge power curve according to the environment temperature change trend.
In a specific application, the battery charging and discharging time length is related to the remaining capacity of the battery pack and the current environment change trend, so that the fixed charging and discharging time length is set according to the current remaining capacity of the battery pack and the environment temperature change trend, a charging and discharging power curve is set based on the charging and discharging time length, and the charging and discharging power curve is adjusted according to the environment temperature trend so as to avoid the situation that the temperature of the battery pack exceeds a safety boundary due to the change of the environment temperature.
In the concrete application, when the battery package is in the charging process, in order to guarantee that the temperature of the battery package can not fluctuate violently, the battery temperature is prevented from being too high, a charging and discharging power curve is corrected according to the change of the ambient temperature, the charging and discharging power is properly reduced under the condition that the ambient temperature is increased, and the condition that the battery is heated and is superposed with the ambient high temperature due to high-power charging and the battery temperature is prevented from being too high is avoided.
For example, if the battery is charged at 12 pm, it is now summer according to the current season. Even if the initial charging temperature is low, the battery management system can predict that the ambient temperature will rise more from 2 pm to 3 pm according to the ambient temperature change trend, and at this time, a relatively conservative charging power curve needs to be adopted to avoid the situation that the ambient temperature rises when high-power charging is carried out, so that the charging power of the battery pack is prevented from exceeding a safety boundary.
In specific application, when the battery pack can reasonably optimize a discharging power curve through the running power of the current vehicle in the discharging process in the season and the day, the condition that the temperature of the battery pack rises too fast and exceeds the safety boundary of the battery pack is effectively avoided.
For example, when the vehicle runs in the afternoon in the burning sun, the power output can be properly reduced, temperature overshoot is avoided in advance, and the situation that the temperature of the battery pack rises too fast to exceed the safety boundary of the battery pack due to overlarge power discharge is avoided. When the vehicle runs at night or in the morning, the power output is released properly according to the characteristic that the temperature is continuously reduced in the time period, so that the temperature of the battery is maintained not to be reduced too fast.
In specific application, the charging power is reduced after the rising amplitude of the temperature change curve is large, and due to the limitation of the heat dissipation power of the battery pack, the temperature of the battery pack can rise in hysteresis, and can exceed the operation safety boundary of the battery pack, and the control cannot be rapidly and effectively carried out.
It should be noted that the battery management system can automatically generate a corresponding charge-discharge power curve according to the current ambient temperature variation trend, the remaining power of the battery pack, and the current driving power of the vehicle, which is not described herein again.
It should be noted that, the operation safety boundary of the battery pack refers to a boundary temperature at which the battery pack does not fail during the operation process, and the operation safety boundary of the battery pack may be set according to actual parameters, which is not limited herein.
Illustratively, as shown in fig. 2, the above-mentioned battery pack operation safety boundaries include a safety voltage boundary and a safety temperature boundary, L1 is a voltage safety boundary, L2 is a temperature safety boundary, V0 is a voltage safety limit value, and D0 is a safety temperature limit value.
It should be noted that the temperature safety limit and the voltage safety limit may be set according to actual requirements, and are not limited herein.
Step S104: and outputting a charging and discharging current according to the charging and discharging time length and the charging and discharging power curve, and controlling charging and discharging of the battery based on the charging and discharging current.
In specific application, the battery management system can calculate the charge-discharge current output in real time according to the charge-discharge duration and the charge-discharge power curve, and control the battery management system to charge the battery pack with the charge current corresponding to the current moment or control the battery management system to control the battery pack to discharge outwards with the discharge current corresponding to the current moment.
It should be noted that calculating the real-time charging and discharging current according to the charging and discharging power curve is a common technical means in the art, and the charging and discharging current corresponding to each time can be calculated by using the existing calculation method, which is not described herein again.
In one embodiment, the battery charge/discharge control method further includes:
s105: and performing on-off control on the cold and hot control system according to the charging and discharging power and the ambient temperature variation trend.
In specific application, in order to further control the temperature of the battery pack, the battery control system can be controlled based on the change trend of the ambient temperature, besides the charge and discharge power is controlled based on the change trend of the ambient temperature, and the cold and hot control system can be automatically controlled to be switched on and off, so that the heat dissipation and the heating in advance are realized, and the problem that the temperature of the battery pack exceeds a safety boundary due to the temperature lag control of the battery pack is effectively solved.
In another embodiment, the battery charge/discharge control method further includes:
step S106: a temperature safety margin is set.
In a specific application, a temperature safety boundary is set through a battery management system, and the temperature safety boundary refers to a boundary temperature at which a battery pack does not fail in an allowable process. The boundary value of the temperature safety boundary may be set according to actual needs, and is not limited herein.
Step S107: and controlling the temperature of the battery not to exceed the temperature safety boundary in the charging and discharging process.
In specific application, the temperature safety boundary is set, the charging and discharging power of the battery is set according to the change trend of the ambient temperature and the heating condition of the battery in the charging and discharging process, and the cold and hot control system is started in real time under the condition of considering temperature hysteresis control, so that the temperature of the battery does not exceed the temperature safety boundary in the charging and discharging process.
According to the battery charging and discharging control method and the terminal device, the time parameter is introduced into the battery management system, the temperature change trend is determined according to the charging and discharging start time, the charging and discharging power is adjusted under the temperature change trend condition, the charging and discharging efficiency can be effectively improved, the intelligent degree of the battery management system is improved by introducing the historical data parameter, the battery temperature is effectively controlled, the battery temperature is prevented from fluctuating violently, and the problems that the charging and discharging efficiency is influenced and the battery temperature is overhigh due to the fact that the battery pack temperature fluctuates violently in the existing battery management system are effectively solved.
Example two:
as shown in fig. 3, in the present embodiment, the step S102 in the first embodiment specifically includes:
step S201: historical temperature data is obtained.
In specific application, a large amount of historical temperature data is obtained through various databases for recording historical temperatures, and the historical temperature data and corresponding time points are stored in an associated mode.
Step S202: and fitting an environment temperature change curve according to the historical temperature data and the charge and discharge starting time.
In specific application, the historical temperature data are classified and summarized according to seasons, months and periods, and historical temperature change trend curves which accord with different periods of each month corresponding to each season are fitted based on the historical temperature data. Illustratively, a historical temperature change trend curve for the morning of 2 months in spring (6:00 to 12:00), a historical temperature change trend curve for the afternoon of 2 months in spring (12:00 to 18:00), and a historical temperature change trend curve for the evening of 2 months in spring (18:00 to every other 6:00) are fitted based on the historical temperature data.
In specific application, historical temperature data of a plurality of years are collected, average calculation is carried out on the historical temperature data of a plurality of years at a certain moment of a certain month in a certain quarter in the historical temperature data of the plurality of years, the average is used as a temperature value of the moment, and historical temperature change trend curves which accord with different periods of the months corresponding to all seasons are fitted based on the temperature value of each moment. For example, if the temperature of 8: 00/2/2011 is 10 ℃, the temperature of 8: 00/2/2008 is 11 ℃, the temperature of 8: 00/2/2013 is 12 ℃, the temperature of 8: 00/2/2015 is 11 ℃, the average temperature of 11 ℃ is taken as the temperature of 8: 00/2/2015.
In specific application, after the historical temperature change trend curves of different periods of each month corresponding to each season are fitted, which period of which month of which quarter the current time belongs to is determined according to the charge and discharge starting time, and then the corresponding ambient temperature change curve is obtained. Illustratively, if the charge and discharge start time is 2 months, No. 3, 8:00, determining that the current time belongs to the morning of 2 months in spring, acquiring a corresponding historical temperature change trend curve, setting the start time at 8:00, and acquiring a historical temperature change trend curve from 8:00 to 12:00 as the current ambient temperature change curve.
In a specific application, the battery management system can automatically generate a corresponding environment change curve after reading the charge and discharge starting time.
Example three:
as shown in fig. 4, in the present embodiment, the step S103 in the first embodiment specifically includes:
step S301: and setting the charging and discharging time length based on the ambient temperature change curve and the residual electric quantity of the battery.
In specific application, after the current battery residual capacity is determined, the corresponding charge-discharge duration can be set according to the battery residual capacity and the ambient temperature change curve.
In specific application, the charging time required by the full charge of the battery and the discharging time required by the discharge of the battery to the residual electric quantity of 0 are calculated through the residual electric quantity of the battery, and the charging time and the discharging time are adaptively adjusted according to the environment temperature change curve. Specifically, if the ambient temperature gradually increases, the charging duration and the discharging duration of the battery are increased, and if the ambient temperature gradually decreases, the charging duration and the discharging duration of the battery are decreased.
In a specific application, when a battery of a certain type is charged with credit power according to historical data, a charging time from 0% of remaining capacity to full charge is a fixed time, and when the battery is discharged with credit power, a discharging time from 100% of remaining capacity to 0% of remaining capacity is also a fixed time, so that a charging and discharging time can be set according to a longest charging and discharging time of the battery (when the battery is charged with credit power, a charging time from 0% of remaining capacity to full charge, and when the battery is discharged with credit power, a discharging time from 100% of remaining capacity to 0% of remaining capacity), for example: if a battery of a certain type is fully charged for 4 hours, it is possible to specify, according to this parameter, that the total charging time must not exceed this time at the longest. If the charging is not stopped due to timeout, the charging is automatically forced to stop.
Step S302: and calculating the charging and discharging power in the charging and discharging process according to the charging and discharging duration, the residual electric quantity of the battery and the ambient temperature change curve to generate a charging and discharging power curve.
In specific application, after determining the charging and discharging duration and the battery residual capacity, the battery management system calculates the charging and discharging power in the whole charging and discharging process within the charging and discharging duration, optimizes the charging and discharging power according to the ambient temperature change curve and generates a charging and discharging power curve.
In specific application, the battery management system can automatically generate a corresponding charge-discharge power curve after inputting the charge-discharge time length, the battery residual capacity and the ambient temperature change curve.
Example four:
as shown in fig. 5, the present embodiment provides a battery management system 100 for performing the method steps of the first embodiment, which includes a time acquisition module 101, a trend acquisition module 102, a setting module 103, and a current output module 104.
The time acquisition module 101 is configured to acquire a charge and discharge start time of the battery.
The trend acquiring module 102 is configured to acquire an ambient temperature change trend according to the charge and discharge start time.
The setting module 103 is configured to set a charging/discharging duration and a charging/discharging power curve according to the ambient temperature variation trend.
The current output module 104 is configured to output a charge and discharge current according to the charge and discharge duration and the charge and discharge power curve, and perform charge and discharge control on the battery based on the charge and discharge current.
In one embodiment, the battery management system further comprises a switch module, a safety margin module, and a control module.
The switch module is used for carrying out on-off control on the cold and hot control system according to the charging and discharging power and the ambient temperature change trend.
The safety boundary module is used for setting a temperature safety boundary.
The control module is used for controlling the temperature of the battery not to exceed the temperature safety boundary in the charging and discharging process.
It should be noted that, since the battery management system provided in the embodiment of the present invention is based on the same concept as the method embodiment shown in fig. 1 of the present invention, the technical effect thereof is the same as the method embodiment shown in fig. 1 of the present invention, and specific contents thereof can be referred to the description of the method embodiment shown in fig. 1 of the present invention, and are not repeated herein.
Therefore, according to the battery management system provided by the embodiment, the time parameter can be introduced into the battery management system, the temperature change trend is determined according to the charge and discharge start time, the charge and discharge power is adjusted under the condition of the temperature change trend, the charge and discharge efficiency can be effectively improved, the intelligent degree of the battery management system is improved by introducing the historical data parameter, the battery temperature is effectively controlled, the severe fluctuation of the battery temperature is avoided, and the problems that the charge and discharge efficiency is influenced and the battery temperature is overhigh due to the severe fluctuation of the battery pack temperature in the conventional battery management system are effectively solved.
Example five:
as shown in fig. 6, in the present embodiment, the trend acquisition module 102 in the fourth embodiment includes a structure for executing the method steps in the embodiment corresponding to fig. 3, and includes a data acquisition unit 201 and a fitting unit 202.
The data acquisition unit 201 is used for acquiring historical temperature data.
The fitting unit 202 is configured to fit an ambient temperature change curve according to the historical temperature data and the charge and discharge start time.
Example six:
as shown in fig. 7, in the present embodiment, the setting module 103 in the fourth embodiment includes a structure for executing the method steps in the embodiment corresponding to fig. 5, and includes a duration determining unit 301 and a curve generating unit 302.
The duration determination unit 301 is configured to set a charging/discharging duration based on the ambient temperature variation curve and the remaining battery capacity.
The curve generating unit 302 is configured to calculate a charging/discharging power during a charging/discharging process according to the charging/discharging duration, the remaining battery capacity, and the ambient temperature variation curve, and generate a charging/discharging power curve.
Example seven:
fig. 8 is a schematic diagram of a terminal device according to a fifth embodiment of the present invention. As shown in fig. 8, the terminal device 7 of this embodiment includes: a processor 70, a memory 71 and a computer program 72, e.g. a program, stored in said memory 71 and executable on said processor 70. The processor 70, when executing the computer program 72, implements the steps in the various embodiments of the picture processing method described above, such as the steps S101 to S104 shown in fig. 1. Alternatively, the processor 70, when executing the computer program 72, implements the functions of the modules/units in the above-described system embodiments, such as the functions of the modules 101 to 104 shown in fig. 5.
Illustratively, the computer program 72 may be partitioned into one or more modules/units that are stored in the memory 71 and executed by the processor 70 to implement the present invention. The one or more modules/units 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 72 in the terminal device 7. For example, the computer program 72 may be divided into a time acquisition module, a trend acquisition module, a setting module, and a current output module, each module having the following specific functions:
the time acquisition module is used for acquiring the charge and discharge starting time of the battery;
the trend acquisition module is used for acquiring the change trend of the environmental temperature according to the charge and discharge starting time;
the setting module is used for setting a charging and discharging time length and a charging and discharging power curve according to the environment temperature change trend;
and the current output module is used for outputting charge and discharge current according to the charge and discharge duration and the charge and discharge power curve and controlling the charge and discharge of the battery based on the charge and discharge current.
The terminal device 7 may be a desktop computer, a notebook, a palm computer, a cloud management server, or other computing devices. The terminal device may include, but is not limited to, a processor 70, a memory 71. It will be appreciated by those skilled in the art that fig. 8 is merely an example of a terminal device 7 and does not constitute a limitation of the terminal device 7 and may include more or less components than those shown, or some components may be combined, or different components, for example the terminal device may also include input output devices, network access devices, buses, etc.
The Processor 70 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-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 memory 71 may be an internal storage unit of the terminal device 7, such as a hard disk or a memory of the terminal device 7. The memory 71 may also be an external storage device of the terminal device 7, 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 7. Further, the memory 71 may also include both an internal storage unit and an external storage device of the terminal device 7. The memory 71 is used for storing the computer program and other programs and data required by the terminal device. The memory 71 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 function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the system is divided into different functional units or modules to perform 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 process of the units and modules in the wireless terminal may refer to the corresponding process in the foregoing method embodiments, and details are not repeated here.
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 system/terminal device and method can be implemented in other ways. For example, the above-described system/terminal device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, multiple 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, systems 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.
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 modules/units, if implemented in the form of software functional units and configured for individual product sale or use, may be stored in a computer readable storage medium. 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 when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or system capable of carrying said 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 signals, telecommunications signals, software distribution medium, etc. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include 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 (4)
1. A vehicle battery charge-discharge control method characterized by comprising:
acquiring the charge and discharge starting time of a battery;
acquiring the change trend of the ambient temperature according to the charge and discharge starting time;
adjusting the charging and discharging duration and the charging and discharging power curve according to the environmental temperature change trend;
outputting a charging and discharging current according to the charging and discharging time length and the charging and discharging power curve, and performing charging and discharging control on the battery based on the charging and discharging current, wherein the battery management system calculates the charging and discharging current output in real time according to the charging and discharging time length and the charging and discharging power curve, controls the battery management system to charge the battery pack with the charging current corresponding to the current moment or controls the battery management system to discharge the battery pack with the discharging current corresponding to the current moment, if the ambient temperature is gradually increased, the charging time length and the discharging time length of the battery are increased, and if the ambient temperature is gradually decreased, the charging time length and the discharging time length of the battery are decreased;
the acquiring of the ambient temperature variation trend according to the charge and discharge starting time includes:
acquiring historical temperature data;
fitting an environment temperature change curve according to the historical temperature data and the charge and discharge starting time;
the setting of the charge-discharge duration and the charge-discharge power curve according to the environment temperature variation trend comprises the following steps:
setting charge-discharge time length based on the ambient temperature change curve and the residual electric quantity of the battery;
calculating the charging and discharging power in the charging and discharging process according to the charging and discharging duration, the battery residual capacity and the ambient temperature change curve to generate a charging and discharging power curve, correcting the charging and discharging power curve according to the ambient temperature change, and properly reducing the charging and discharging power under the condition that the ambient temperature is increased to avoid the condition that the battery is heated due to high-power charging and is overlapped with the ambient high temperature to further cause overhigh temperature of the battery;
further comprising:
performing on-off control on the cold and hot control system according to the charging and discharging power and the ambient temperature variation trend;
further comprising:
setting a temperature safety boundary;
and controlling the temperature of the battery not to exceed the temperature safety boundary in the charging and discharging process.
2. A vehicle battery management system, comprising:
the time acquisition module is used for acquiring the charge and discharge starting time of the battery;
the trend acquisition module is used for acquiring the change trend of the environmental temperature according to the charge and discharge starting time;
the setting module is used for adaptively adjusting the charging and discharging duration and the charging and discharging power curve according to the environment temperature change trend;
the current output module is used for outputting charge and discharge current according to the charge and discharge time length and the charge and discharge power curve and carrying out charge and discharge control on the battery based on the charge and discharge current, wherein the battery management system calculates the charge and discharge current output in real time according to the charge and discharge time length and the charge and discharge power curve, controls the battery management system to charge the battery pack according to the charge current corresponding to the current moment or controls the battery management system to discharge the battery pack outwards according to the discharge current corresponding to the current moment, if the ambient temperature is gradually increased, the charge time length and the discharge time length of the battery are increased, and if the ambient temperature is gradually decreased, the charge time length and the discharge time length of the battery are reduced;
the trend acquisition module comprises:
the data acquisition unit is used for acquiring historical temperature data;
the fitting unit is used for fitting an environment temperature change curve according to the historical temperature data and the charging and discharging starting time;
the setting module includes:
the time length determining unit is used for setting charging and discharging time length based on the environment temperature change curve and the residual electric quantity of the battery;
the curve generation unit is used for calculating the charging and discharging power in the charging and discharging process according to the charging and discharging duration, the battery residual capacity and the environment temperature change curve to generate a charging and discharging power curve, correcting the charging and discharging power curve according to the environment temperature change, and properly reducing the charging and discharging power under the condition that the environment temperature is increased to avoid the condition that the battery is heated due to high-power charging and is overlapped with the environment high temperature to further cause overhigh battery temperature;
the battery management system also comprises a switch module, a safety boundary module and a control module;
the switch module is used for carrying out on-off control on the cold and hot control system according to the charging and discharging power and the ambient temperature variation trend;
the safety boundary module is used for setting a temperature safety boundary;
the control module is used for controlling the temperature of the battery not to exceed the temperature safety boundary in the charging and discharging process.
3. 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 as claimed in claim 1 when executing the computer program.
4. 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 as set forth in claim 1.
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| CN114865752B (en) * | 2022-07-05 | 2022-09-30 | 广东采日能源科技有限公司 | Charging and discharging control method and control device for energy storage equipment |
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| CN106160079A (en) * | 2016-07-08 | 2016-11-23 | 乐视控股（北京）有限公司 | Charge control method and device |
| KR102123675B1 (en) * | 2016-10-31 | 2020-06-26 | 주식회사 엘지화학 | Method for proctect overcharg, overdischargge and efficiency increasing of battery pack |
| KR20180066292A (en) * | 2016-12-07 | 2018-06-19 | 주식회사 투엠아이 | Fast charge protocol and system of battery to reduce the lifetime of secondary batteries and prevent explosion |
| CN107831441B (en) * | 2017-09-20 | 2019-11-05 | 哈尔滨理工大学 | Prediction technique, forecasting system and a kind of charging unit of lithium battery charging current |
| CN108054805B (en) * | 2018-01-09 | 2024-05-28 | 西安炽云老虎充电科技有限公司 | Electric automobile charging protection method capable of adjusting voltage range |
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| CN106016595A (en) * | 2015-08-07 | 2016-10-12 | 南京军理科技股份有限公司 | Method and system for monitoring indoor air conditioner temperature |
| CN108270252A (en) * | 2016-12-30 | 2018-07-10 | 维沃移动通信有限公司 | The method and mobile terminal of a kind of charging, charging equipment |
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