CN115037018A - Storage battery pack control method and system - Google Patents
Storage battery pack control method and system Download PDFInfo
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- CN115037018A CN115037018A CN202210949119.8A CN202210949119A CN115037018A CN 115037018 A CN115037018 A CN 115037018A CN 202210949119 A CN202210949119 A CN 202210949119A CN 115037018 A CN115037018 A CN 115037018A
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
- H02J7/0049—Detection of fully charged condition
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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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
- H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a storage battery pack control method and a storage battery pack control system, wherein the method comprises the following steps: acquiring the voltage upper limit value of each single battery; respectively comparing the voltage upper limit values of each single battery one by one to obtain a highest voltage upper limit value, and respectively calculating the voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value; updating the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value; and if the real-time voltage of each single battery is lower than a preset first voltage threshold when the storage battery is in a discharging state, generating a discharging instruction, and controlling the standby node of each single battery to be used as a voltage source to continue discharging. The problem that the service life of certain aged or poor-performance single batteries is shortened due to the fact that the other single batteries charge the certain aged or poor-performance single batteries and the certain aged or poor-performance single batteries discharge is solved.
Description
Technical Field
The invention belongs to the technical field of storage batteries, and particularly relates to a storage battery pack control method and system.
Background
The rated voltage of a direct current power supply system used by the substation is DC220V, and most of the storage battery packs only form one battery pack by using single voltage 2V 108 (or 104). But also has the space limit of a transformer substation, and a single battery with the voltage of 12V by 18 is used for forming a battery pack. The single batteries are used in series, the performance of each battery is not identical, and a slight difference in voltage is a normal phenomenon. The voltage of the single battery with 2V is 1.80V-2.28V. When the battery is fully charged, the voltage should be about 2.25V, and when the battery is used for performing charge and discharge experiments or supplying power to equipment, any single cell voltage in the battery is released to 1.80V before the battery is immediately stopped so as to avoid permanent damage to the battery.
In the discharging process, when some single batteries with aging or poor performance are discharged before other single batteries, the storage battery pack is formed by connecting a plurality of single batteries in series, so that other single batteries charge some single batteries with aging or poor performance, and then some single batteries with aging or poor performance are discharged, so that the service life of some single batteries with aging or poor performance is shortened.
Disclosure of Invention
The invention provides a storage battery pack control method and a storage battery pack control system, which are used for solving the technical problem that in the discharging process, other single batteries charge certain aged or poor-performance single batteries, and then certain aged or poor-performance single batteries discharge, so that the service lives of certain aged or poor-performance single batteries are shortened.
In a first aspect, the present invention provides a storage battery control method, where the storage battery includes at least one battery cell and standby nodes connected in parallel with the at least one battery cell, where each standby node includes a bidirectional DC/DC switching power supply module and a super capacitor, the bidirectional DC/DC switching power supply module and the super capacitor are in parallel, one end of the standby node is connected to the positive and negative electrodes of each battery cell, and the other end is connected to the positive and negative electrodes of a battery pack, and the method includes: respectively monitoring the real-time voltage of each single battery, and acquiring the upper limit value of the voltage of each single battery; respectively comparing the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and respectively calculating the voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain the voltage difference value of each single battery; updating the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery; judging the charge-discharge state of the storage battery pack; if the storage battery pack is in a discharging state, respectively judging whether the real-time voltage of each single battery is lower than a preset first voltage threshold value; if the real-time voltage of each single battery is lower than a preset first voltage threshold, generating a discharging instruction, and controlling a standby node of each single battery to be used as a voltage source to continue discharging, wherein the voltage value of the standby node of each single battery is the sum of the real-time voltage of each single battery and the voltage difference value of each single battery; if the storage battery pack is in a charging state, respectively judging whether the real-time voltage of each single battery exceeds a corresponding voltage upper limit value; and if the real-time voltage of each single battery exceeds the corresponding upper voltage limit value, generating a voltage regulation instruction, controlling the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and sending an alarm prompt to prompt the storage battery pack to have a fault.
In a second aspect, the present invention provides a storage battery pack control system, where the storage battery pack includes at least one battery cell and standby nodes connected in parallel with the at least one battery cell, where each standby node includes a bidirectional DC/DC switching power supply module and a super capacitor, the bidirectional DC/DC switching power supply module and the super capacitor are connected in parallel, one end of the standby node is connected to the positive and negative electrodes of each battery cell, and the other end of the standby node is connected to the positive and negative electrodes of the battery pack, and the system includes: the acquisition module is configured to monitor the real-time voltage of each single battery respectively and acquire the voltage upper limit value of each single battery; the calculation module is configured to compare the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and calculate a voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain a voltage difference value of each single battery; the updating module is configured to update the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery; the first judgment module is configured to judge the charge and discharge state of the storage battery pack; the second judgment module is configured to respectively judge whether the real-time voltage of each single battery is lower than a preset first voltage threshold value if the storage battery pack is in a discharge state; the first control module is configured to generate a discharge instruction and control the standby node of each single battery to be used as a voltage source to continue discharging if the real-time voltage of each single battery is lower than a preset first voltage threshold, wherein the voltage value of the standby node of each single battery is the sum of the real-time voltage of each single battery and the voltage difference value of each single battery; the third judging module is configured to respectively judge whether the real-time voltage of each single battery exceeds a corresponding voltage upper limit value if the storage battery pack is in a charging state; and the second control module is configured to generate a voltage regulation instruction if the real-time voltage of each single battery exceeds the corresponding voltage upper limit value, control the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and send an alarm prompt to prompt the storage battery pack to have a fault.
In a third aspect, an electronic device is provided, comprising: the battery pack control system comprises at least one processor and a memory which is in communication connection with the at least one processor, wherein the memory stores instructions which can be executed by the at least one processor, and the instructions are executed by the at least one processor so as to enable the at least one processor to execute the steps of the battery pack control method according to any embodiment of the invention.
In a fourth aspect, the present invention also provides a computer-readable storage medium having stored thereon a computer program, which when executed by a processor, causes the processor to execute the steps of the battery pack control method according to any of the embodiments of the present invention.
The storage battery pack control method and the storage battery pack control system are characterized in that each single battery is connected with a standby node in parallel, when the storage battery pack is in a discharge state, the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value is updated according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery, so that the voltage of the standby node can change along with the voltage of the single battery, further, when the real-time voltage of the single battery is lower than a preset first voltage threshold value, the standby node of the corresponding single battery can be started to be used as a voltage source to continue to supply power until the single battery corresponding to the highest voltage upper limit value finishes discharging, and the problem that the storage battery pack is formed by connecting a plurality of single batteries in series, other single batteries can charge certain aged or poor single batteries, and then certain aged or poor single batteries discharge is solved, therefore, the service life of certain aged or poor-performance single batteries is shortened, when the storage battery pack is in a charging state and the real-time voltage of the single batteries exceeds the corresponding upper voltage limit value, the voltage value of the single batteries is reduced by starting the standby node of the corresponding single battery as a load, so that the single batteries which do not reach the upper voltage limit value are charged, and each single battery of the storage battery pack is in a full-charge state.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a flowchart of a battery pack control method according to an embodiment of the present invention;
fig. 2 is a block diagram of a battery pack control system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flow chart of a battery pack control method of the present application is shown. The storage battery pack comprises at least one single battery and standby nodes connected with the at least one single battery in parallel, each standby node comprises a bidirectional DC/DC switching power supply module and a super capacitor, the bidirectional DC/DC switching power supply modules and the super capacitors are connected in parallel, one end of each standby node is connected with the positive electrode and the negative electrode of each single battery, and the other end of each standby node is connected with the positive electrode and the negative electrode of the battery pack.
As shown in fig. 1, the battery pack control method specifically includes the steps of:
step S101, respectively monitoring the real-time voltage of each single battery, and acquiring the voltage upper limit value of each single battery.
In this embodiment, the battery pack may include a plurality of single batteries, and detect the voltage of each single battery, respectively, and a sensor may be disposed on each single battery to monitor the voltage value of each single battery.
And respectively acquiring the voltage upper limit value of each single battery. Due to the difference in manufacturing and different aging conditions in the use process of each single battery, the performance parameters of each single battery are different. The calculation method of the voltage upper limit value of each single battery can be that the voltage monitoring record of each single battery is read, and the individual voltage upper limit value of each single battery is determined according to the record of the voltage value. The upper voltage limit value of each unit cell may be stored in a database in which the upper voltage limit threshold value of each unit cell is stored.
Alternatively, the upper voltage limit value of each unit cell may be updated at intervals to match the aging of the unit cells over time.
And S102, comparing the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and calculating the voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain the voltage difference value of each single battery.
In this embodiment, after the voltage upper limit value of each single battery in the battery pack is obtained, the voltage upper limit values of each single battery are compared one by one, and the voltage upper limit value of the single battery with the highest voltage upper limit value is used as the highest voltage upper limit value. In addition, the voltage upper limit value of each single battery is different from the highest voltage upper limit value, so that the voltage difference value of each single battery can be obtained.
And step S103, updating the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery.
In the embodiment, the sum of the real-time voltage of each single battery and the voltage difference value of each single battery is updated to the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value, so that the voltage difference value of the real-time voltage of each single battery and the corresponding standby node of each single battery is always the highest voltage upper limit value minus the voltage upper limit value of each single battery.
And step S104, judging the charge and discharge state of the storage battery pack.
In the present embodiment, since the voltage variation of each unit cell is different between the time of charging and the time of discharging the battery pack, the voltage of each unit cell tends to increase during charging, and the voltage of each unit cell tends to decrease during discharging. Therefore, when determining the condition of each single battery in the battery pack, the charge/discharge state of the battery pack is determined first.
The charge/discharge state of the battery pack is determined by determining the current direction of the battery pack, and the battery pack is in the charge state when the current direction is in-flow, and the battery pack is in the discharge state when the current direction is out-flow.
Step S105, if the storage battery pack is in a discharging state, respectively judging whether the real-time voltage of each single battery is lower than a preset first voltage threshold value.
In this embodiment, when the storage battery pack is in a discharge state, it is determined whether the real-time voltage of each single battery is lower than a preset first voltage threshold, and it can be further determined whether each single battery reaches a discharge protection voltage (generally, the discharge of each single battery is not performed after the discharge protection voltage is reached by the single battery, so as to prevent permanent damage to the battery). The first voltage threshold and the discharge protection voltage can be set according to the performance and the aging degree of the single battery.
And step S106, if the real-time voltage of each single battery is lower than a preset first voltage threshold, generating a discharging instruction, and controlling the standby node of each single battery to be used as a voltage source to continue discharging.
In this embodiment, when a certain single battery reaches the discharge protection voltage, a discharge instruction is generated, and the standby node of the certain single battery is controlled to be used as a voltage source to continue discharging, where the voltage value of the standby node of the certain single battery is a first voltage threshold, that is, the sum of the discharge protection voltage and the voltage difference value of each single battery. And continuously discharging by taking the standby node as a voltage source until other single batteries are completely discharged so as to maintain consistency among each single battery in the storage battery pack. The situation that other single batteries charge a certain single battery in the discharging process and then the certain single battery discharges can be reduced.
And step S107, judging whether the real-time voltage of each single battery exceeds the corresponding voltage upper limit value.
In this embodiment, the charging state of each single battery can be obtained in real time by determining whether the real-time voltage of each single battery exceeds the corresponding voltage upper limit value. For example, when the real-time voltage of a certain single battery does not exceed the corresponding upper voltage limit, the certain single battery is in an under-charged state, and when the real-time voltage of the certain single battery exceeds the corresponding upper voltage limit, the certain single battery is in a fully charged state.
And step S108, if the real-time voltage of each single battery exceeds the corresponding voltage upper limit value, generating a voltage regulation instruction, controlling the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and sending an alarm prompt to prompt the storage battery pack to have a fault.
In this embodiment, when the real-time voltage of a certain cell exceeds the corresponding upper voltage limit, the certain cell is in a full charge state, and the performance of each cell is different, thereby causing the capacity of each cell to be different, so that an overcharge phenomenon can occur when the certain cell is still continuously charged, and some cells are in an unfilled state, at this time, the voltage value of the cell is reduced by using the standby node corresponding to the cell with small capacity as a load, and the cell with small capacity is not overcharged while the cell without the upper voltage limit is charged, thereby realizing that each cell of the storage battery pack is in a full charge state.
To sum up, the method of the application is that each single battery is connected with a standby node in parallel, when the storage battery pack is in a discharge state, the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value is updated according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery, so that the voltage of the standby node can change along with the voltage of the single battery, and further, when the real-time voltage of the single battery is lower than a preset first voltage threshold value, the standby node of the corresponding single battery can be started to serve as a voltage source to continue to supply power until the single battery corresponding to the highest voltage upper limit value finishes discharging, thereby solving the problem that as the storage battery pack is formed by connecting a plurality of single batteries in series, other single batteries can charge certain aged or poor single batteries, and then certain aged or poor single batteries discharge, therefore, the service life of certain aged or poor-performance single batteries is shortened, when the storage battery pack is in a charging state and the real-time voltage of the single batteries exceeds the corresponding upper voltage limit value, the voltage value of the single batteries is reduced by starting the standby node of the corresponding single battery as a load, so that the single batteries which do not reach the upper voltage limit value are charged, and each single battery of the storage battery pack is in a full-charge state.
In some optional embodiments, if the battery pack is in a charging state, if the real-time voltage of each single battery is higher than a preset second voltage threshold, the instruction for reducing the charging current is generated. In the embodiment of the present application, the minimum charging current can be reduced to zero, i.e., the charging of the battery pack is stopped.
Referring to fig. 2, a block diagram of a battery pack control system according to the present application is shown.
As shown in fig. 2, the battery pack control system 200 includes an obtaining module 210, a calculating module 220, an updating module 230, a first determining module 240, a second determining module 250, a first control module 260, a third determining module 270, and a second control module 280.
The obtaining module 210 is configured to monitor a real-time voltage of each single battery, and obtain an upper limit of the voltage of each single battery;
a calculating module 220, configured to compare the voltage upper limit values of each single battery one by one to obtain a highest voltage upper limit value, and calculate a voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain a voltage difference value of each single battery;
an updating module 230 configured to update the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit according to the sum of the real-time voltage of each single battery and the voltage difference of each single battery;
a first determining module 240 configured to determine a charging/discharging state of the battery pack;
a second determining module 250, configured to respectively determine whether the real-time voltage of each single battery is lower than a preset first voltage threshold if the storage battery is in a discharging state;
a first control module 260, configured to generate a discharge instruction if the real-time voltage of each single battery is lower than a preset first voltage threshold, and control a standby node of each single battery to continue discharging as a voltage source, where a voltage value of the standby node of each single battery is a sum of a real-time voltage of each single battery and a voltage difference value of each single battery;
a third determining module 270, configured to respectively determine whether the real-time voltage of each single battery exceeds a corresponding upper voltage limit if the storage battery pack is in a charging state;
the second control module 280 is configured to generate a voltage regulation instruction if the real-time voltage of each single battery exceeds the corresponding voltage upper limit value, control the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and send an alarm prompt to prompt the storage battery pack to have a fault.
It should be understood that the modules depicted in fig. 2 correspond to various steps in the method described with reference to fig. 1. Thus, the operations and features described above for the method and the corresponding technical effects are also applicable to the modules in fig. 1, and are not described again here.
In still other embodiments, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the program instructions, when executed by a processor, cause the processor to execute the battery pack control method in any of the above-mentioned method embodiments;
as one embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions configured to:
respectively monitoring the real-time voltage of each single battery, and acquiring the upper limit value of the voltage of each single battery;
respectively comparing the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and respectively calculating the voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain the voltage difference value of each single battery;
updating the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
judging the charge-discharge state of the storage battery pack;
if the storage battery pack is in a discharging state, respectively judging whether the real-time voltage of each single battery is lower than a preset first voltage threshold value;
if the real-time voltage of each single battery is lower than a preset first voltage threshold, generating a discharge instruction, and controlling a standby node of each single battery to be used as a voltage source to continue discharging, wherein the voltage value of the standby node of each single battery is the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
if the storage battery pack is in a charging state, respectively judging whether the real-time voltage of each single battery exceeds a corresponding voltage upper limit value;
and if the real-time voltage of each single battery exceeds the corresponding upper voltage limit value, generating a voltage regulation instruction, controlling the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and sending an alarm prompt to prompt the storage battery pack to have a fault.
The computer-readable storage medium may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the battery pack control system, and the like. Further, the computer-readable storage medium may include high speed random access memory, and may also include memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the computer readable storage medium optionally includes memory located remotely from the processor, which may be connected to the battery control system over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 3, the electronic device includes: a processor 310 and memory 320. The electronic device may further include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330, and the output device 340 may be connected by a bus or other means, such as the bus connection in fig. 3. The memory 320 is the computer-readable storage medium described above. The processor 310 executes various functional applications of the server and data processing by running nonvolatile software programs, instructions and modules stored in the memory 320, so as to implement the battery pack control method of the above-mentioned method embodiment. The input device 330 may receive input numeric or character information and generate key signal inputs related to user settings and function control of the battery pack control system. The output device 340 may include a display device such as a display screen.
The electronic device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
As an embodiment, the electronic device is applied to a battery pack control system, and is used for a client, and the electronic device includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to:
respectively monitoring the real-time voltage of each single battery, and acquiring the upper limit value of the voltage of each single battery;
respectively comparing the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and respectively calculating the voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain the voltage difference value of each single battery;
updating the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
judging the charge-discharge state of the storage battery pack;
if the storage battery pack is in a discharging state, respectively judging whether the real-time voltage of each single battery is lower than a preset first voltage threshold value;
if the real-time voltage of each single battery is lower than a preset first voltage threshold, generating a discharge instruction, and controlling a standby node of each single battery to be used as a voltage source to continue discharging, wherein the voltage value of the standby node of each single battery is the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
if the storage battery pack is in a charging state, respectively judging whether the real-time voltage of each single battery exceeds a corresponding voltage upper limit value;
and if the real-time voltage of each single battery exceeds the corresponding upper voltage limit value, generating a voltage regulation instruction, controlling the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and sending an alarm prompt to prompt the storage battery pack to have a fault.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A storage battery pack control method is characterized in that the storage battery pack comprises at least one single battery and standby nodes connected with the at least one single battery in parallel, wherein each standby node comprises a bidirectional DC/DC switch power supply module and a super capacitor, the bidirectional DC/DC switch power supply module and the super capacitor are connected in parallel, one end of each standby node is connected with the positive electrode and the negative electrode of each single battery, the other end of each standby node is connected with the positive electrode and the negative electrode of a battery pack, and the method comprises the following steps:
respectively monitoring the real-time voltage of each single battery, and acquiring the upper limit value of the voltage of each single battery;
respectively comparing the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and respectively calculating the voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain the voltage difference value of each single battery;
updating the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
judging the charge-discharge state of the storage battery pack;
if the storage battery pack is in a discharging state, respectively judging whether the real-time voltage of each single battery is lower than a preset first voltage threshold value;
if the real-time voltage of each single battery is lower than a preset first voltage threshold, generating a discharging instruction, and controlling a standby node of each single battery to be used as a voltage source to continue discharging, wherein the voltage value of the standby node of each single battery is the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
if the storage battery pack is in a charging state, respectively judging whether the real-time voltage of each single battery exceeds a corresponding voltage upper limit value;
and if the real-time voltage of each single battery exceeds the corresponding upper voltage limit value, generating a voltage regulation instruction, controlling the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and sending an alarm prompt to prompt the storage battery pack to have a fault.
2. The battery pack control method according to claim 1, wherein said obtaining the upper voltage limit value of each unit cell comprises:
acquiring historical voltage monitoring data of each single battery;
and determining the voltage upper limit value of each single battery according to the historical voltage detection data of each single battery.
3. A storage battery pack control system is characterized in that the storage battery pack comprises at least one single battery and standby nodes connected with the at least one single battery in parallel, each standby node comprises a bidirectional DC/DC switching power supply module and a super capacitor, the bidirectional DC/DC switching power supply module and the super capacitor are connected in parallel, one end of each standby node is connected with the positive electrode and the negative electrode of each single battery, the other end of each standby node is connected with the positive electrode and the negative electrode of a battery pack, and the system comprises:
the acquisition module is configured to monitor the real-time voltage of each single battery respectively and acquire the voltage upper limit value of each single battery;
the calculation module is configured to compare the voltage upper limit values of the single batteries one by one to obtain a highest voltage upper limit value, and calculate a voltage difference value between the voltage upper limit value of each single battery and the highest voltage upper limit value to obtain a voltage difference value of each single battery;
the updating module is configured to update the voltage of the standby node of each single battery except the single battery corresponding to the highest voltage upper limit value according to the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
the first judgment module is configured to judge the charge and discharge state of the storage battery pack;
the second judgment module is configured to respectively judge whether the real-time voltage of each single battery is lower than a preset first voltage threshold value if the storage battery pack is in a discharge state;
the first control module is configured to generate a discharge instruction and control the standby node of each single battery to be used as a voltage source to continue discharging if the real-time voltage of each single battery is lower than a preset first voltage threshold, wherein the voltage value of the standby node of each single battery is the sum of the real-time voltage of each single battery and the voltage difference value of each single battery;
the third judging module is configured to respectively judge whether the real-time voltage of each single battery exceeds a corresponding voltage upper limit value if the storage battery pack is in a charging state;
and the second control module is configured to generate a voltage regulation instruction if the real-time voltage of each single battery exceeds the corresponding voltage upper limit value, control the standby node of each single battery to serve as a load to reduce the voltage of each single battery, and send an alarm prompt to prompt the storage battery pack to have a fault.
4. An electronic device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any of claims 1-2.
5. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 2.
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| CN115037018B (en) | 2022-12-30 |
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