CN113612269A - Battery monomer charging and discharging control method and system for lead-acid storage battery energy storage station - Google Patents

Battery monomer charging and discharging control method and system for lead-acid storage battery energy storage station Download PDF

Info

Publication number
CN113612269A
CN113612269A CN202110752747.2A CN202110752747A CN113612269A CN 113612269 A CN113612269 A CN 113612269A CN 202110752747 A CN202110752747 A CN 202110752747A CN 113612269 A CN113612269 A CN 113612269A
Authority
CN
China
Prior art keywords
battery
single battery
charging
lead
discharging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110752747.2A
Other languages
Chinese (zh)
Other versions
CN113612269B (en
Inventor
王晓军
王贞民
夏坤
宋健
王新娇
董金龙
王潇然
宋培泽
王函旭
焦平洋
段元栋
闫传文
刘峰
王西芝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Laiwu Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Laiwu Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Laiwu Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202110752747.2A priority Critical patent/CN113612269B/en
Publication of CN113612269A publication Critical patent/CN113612269A/en
Application granted granted Critical
Publication of CN113612269B publication Critical patent/CN113612269B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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]
    • 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
    • H02J7/005—Detection of state of health [SOH]
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
    • 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
    • H02J7/007186—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage obtained with the battery disconnected from the charge or discharge circuit
    • 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
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model discloses a method and a system for controlling the charging and discharging of a battery monomer in a lead-acid storage battery energy storage station, which comprises the following steps: acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery; inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery; and controlling the charging and discharging of the single batteries according to the working states of the single batteries. The state monitoring of the single battery is realized, the charging and discharging control is carried out according to the state monitoring result, and the service life of the single battery is prolonged.

Description

Battery monomer charging and discharging control method and system for lead-acid storage battery energy storage station
Technical Field
The invention relates to the technical field of battery charging and discharging, in particular to a method and a system for controlling charging and discharging of a battery monomer of a lead-acid storage battery energy storage station.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The configuration of the energy storage power station is beneficial to the consumption of new energy, the battery cost accounts for 60%, and the construction cost of the energy storage power station is effectively reduced by recycling the power grid return battery.
Aiming at an energy storage power station built by using lead-acid batteries, the current battery management system cannot realize the accurate control of a single-core battery, has a single capacity balancing function, and can cause the service life of the whole storage battery pack to be reduced and the power supply output to be unstable due to the fact that a low-capacity battery influences the operation level of the whole storage battery pack after long-term operation. The reduction of the service life of the battery pack can cause the increase of the operation and maintenance workload of the staff of the energy storage power station, and generate a great deal of waste of manpower and material resources; the unstable output of the battery value of the energy storage power station can greatly influence the power supply quality of a power grid.
Disclosure of Invention
In order to solve the above problems, the present disclosure provides a method and a system for controlling charging and discharging of a single battery in a lead-acid storage battery energy storage station, which implement state monitoring of the single battery, and control charging and discharging of the single battery according to the monitored state of the single battery, thereby prolonging the service life of the single battery and effectively improving the working efficiency of the whole battery pack.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
in a first aspect, a method for controlling charging and discharging of a battery monomer in a lead-acid storage battery energy storage station is provided, which includes:
acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery;
inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery;
and controlling the charging and discharging of the single batteries according to the working states of the single batteries.
In a second aspect, a single battery charge and discharge control system for a lead-acid storage battery energy storage station is provided, which includes:
the data acquisition module is used for acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery;
the single battery working state prediction module is used for inputting the acquired charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to acquire the working state of the single battery;
and the single battery charging and discharging control module is used for controlling the charging and discharging of the single battery according to the working state of the single battery.
In a third aspect, an integrated battery management system for a lead-acid battery energy storage station is provided, which includes:
the data acquisition module is used for acquiring the current and the voltage of the battery pack, and the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single batteries forming the battery pack;
the control module is used for judging the working state of the battery pack according to the acquired current and voltage of the battery pack and controlling the charging and discharging of the battery pack according to the working state of the battery pack; and inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery, and controlling the charging and discharging of the single battery according to the working state of the single battery.
In a fourth aspect, an electronic device is provided, which includes a memory, a processor, and computer instructions stored in the memory and executed on the processor, where the computer instructions, when executed by the processor, perform the steps of the method for controlling charging and discharging of battery cells in a lead-acid battery energy storage station.
In a fifth aspect, a computer-readable storage medium is provided for storing computer instructions, and the computer instructions, when executed by a processor, perform the steps of a method for controlling charging and discharging of battery cells in a lead-acid battery energy storage station.
Compared with the prior art, the beneficial effect of this disclosure is:
1. this is disclosed through the charging current, cut-off voltage, battery temperature and the residual capacity who acquires battery cell, has realized the monitoring to the battery cell state to can carry out corresponding charge-discharge control according to the battery cell state of monitoring, prolong battery cell's life, effectively promote the work efficiency of whole group battery, solve group battery cask short slab problem, effectively reduce the manpower and materials waste that battery cell changed and brought.
2. According to the method and the device, the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery are obtained, the parameters are analyzed, the service life of the single battery is predicted, an alarm is sent according to the service life prediction result of the single battery, the single battery with the service life not meeting the requirement can be replaced in time, accidents caused by faults of the single battery can be prevented in the future, the probability of accidents of an energy storage power station is greatly reduced, and the method and the device have important social and economic benefits for ensuring the life safety of workers.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a flow chart of a method disclosed in example 1 of the present disclosure;
FIG. 2 is a state diagram of the method disclosed in embodiment 1 of the present disclosure;
fig. 3 is a functional schematic diagram of a system disclosed in embodiment 3 of the present disclosure.
Wherein: 100. charging current, 101, cut-off voltage, 102, battery temperature, 103, remaining capacity, 105, state determination, 106, and charge/discharge control.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
Example 1
Because the existing battery management system only monitors the overall state of the battery pack and cannot realize accurate monitoring control on the single batteries, the low-capacity batteries influence the operation level of the whole battery pack, and the long-term operation can cause the service life of the whole storage battery pack to be reduced and the power supply output to be unstable.
Therefore, in order to improve the overall service life of the battery pack and the stability of power supply, in this embodiment, a method for controlling charging and discharging of a battery cell of an energy storage station of a lead-acid battery is provided, including:
acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery;
inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery;
and controlling the charging and discharging of the single batteries according to the working states of the single batteries.
Further, the obtained charging current of the single battery is the maximum charging current when the single battery is charged.
Further, the obtained cut-off voltage of the single battery is the voltage of the single battery after discharge.
Further, the process of obtaining the remaining capacity of the single battery is as follows:
acquiring discharge current of the single battery;
and analyzing the obtained discharge current of the single battery by an ampere-hour integration method to obtain the residual electric quantity of the single battery.
Furthermore, a single battery working state prediction model adopts a BP neural network.
Further, the acquired working state of the single battery includes whether the residual life of the single battery meets the requirement, whether the single battery is full, and whether the single battery is over-discharged.
Further, the specific process of controlling the charging and discharging of the single battery according to the working state of the single battery is as follows:
when the single battery is in a full-charge state, stopping charging the single battery;
when the single battery is in a non-full state, charging the single battery;
when the single battery is in an overdischarge state, rapidly charging the single battery;
and when the service life of the single battery does not meet the requirement, giving an alarm.
The method for controlling the charging and discharging of the battery cells in the lead-acid battery energy storage station disclosed in this embodiment is described in detail with reference to fig. 1 and 2.
A method for controlling charging and discharging of single batteries of a lead-acid storage battery energy storage station comprises the steps of firstly monitoring charging current 100, cut-off voltage 101, battery temperature 102 and residual capacity 103 of the single lead-acid batteries on line through a sensor, then analyzing the obtained charging current 100, cut-off voltage 101, battery temperature 102 and residual capacity 103 through an intelligent algorithm 104 to obtain the working state of the single batteries, realizing judgment 105 of the working state of the single batteries, and performing charging and discharging control 106 of the single battery according to the obtained working state of the single battery, wherein the charging and discharging control comprises control of charging voltage, charging current and charging event of the single battery, thereby prolong battery cell's life, battery cell's life's extension can effectively promote the work efficiency of whole group battery, the indirect life who promotes whole group battery and the stability of supplying power.
The energy storage power station taking the lead-acid battery as a main part is different from the lithium battery energy storage power station, the number of lead-acid battery monomers is relatively small, so that the number of battery packs is also small, and meanwhile, the size of the lead-acid battery monomers is large, so that the on-line monitoring of various operation parameters of the single lead-acid battery by adopting a sensor and the charge and discharge control of the single lead-acid battery by adopting a power electronic device become possible.
The charging current of the single lead-acid battery is monitored by adopting a current sensor, wherein the current sensor can be a Hall current sensor or a magnetic induction current sensor and the like, and the current sensor is a sensor type which is suggested to be selected but is not limited to the types.
As overcharge is the most main factor influencing the service life of the lead-acid storage battery, the maximum charging current during the charging of the lead-acid storage battery can reflect the overcharge condition of the single battery, overcharge can be caused when the charging current exceeds the maximum current allowed by oxygen circulation, oxygen evolution occurs on the positive electrode of the lead-acid storage battery, the pressure of a storage battery shell is increased, oxygen generated in the deep part of a polar plate can form bubbles in the evolution process, and impacts the active material lead dioxide (PbO2) of the positive plate to cause the bonding force between the active material lead dioxide and a plate grid to be reduced, even fall off occurs, the service life of the active material of the active plate is influenced, and the capacity of the storage battery is reduced. Therefore, in order to accurately predict the service life of the single lead-acid battery, the collected charging current 100 of the single lead-acid battery is the maximum charging current when the single lead-acid battery is charged.
The monitoring of the cut-off voltage 101 of the single lead-acid battery is realized by adopting a voltage sensor, the adopted voltage sensor is a voltage transformer or a hall voltage sensor, and the type of the voltage sensor is not limited to the above type.
As overdischarge is an important factor influencing the service life of the lead-acid storage battery, the lead-acid storage battery is required to avoid overdischarge, particularly deep discharge, large-particle lead sulfate (Pb SO4) crystals are generated on the surface of a polar plate of the lead-acid storage battery during overdischarge and are difficult to recover, and the polar plate is sulfated due to long-term overdischarge, SO that the service life of the lead-acid storage battery is shortened. When a lead acid battery is overdischarged to a voltage below its cut-off voltage or even zero, a large amount of lead sulfate (Pb SO4) will be adsorbed to the cathode surface, causing sulfation of the cathode. Lead sulfate is an insulator, the formation of which seriously affects the charge and discharge performance of the lead-acid battery, and the more sulfate is formed on the cathode, the higher the internal resistance of the lead-acid battery is, the worse the charge and discharge performance is, and the shorter the service life is.
Therefore, in order to accurately predict the service life of the single lead-acid battery, the collected cut-off voltage 101 of the single lead-acid battery is the discharged voltage of the single lead-acid battery.
The monitoring of the temperature 102 of the single lead-acid battery is realized by a temperature sensor, the temperature sensor can be a thermal resistor, a thermocouple or the like, and in particular, the type of the temperature sensor is not limited to the above type.
The temperature of the single battery can also reflect the service life of the single battery, and the factory of the lead-acid storage battery generally gives the service temperature range of the lead-acid storage battery, and the lead-acid storage battery can exert the optimal performance when used in the temperature range. Due to the structural particularity of the lead-acid storage battery, the electrolyte concentration is high, and a compact lead sulfate (PbSO4) crystallization layer is easily formed on a negative plate during heavy-current discharge at low temperature, so that the chemical reaction speed of the electrode is reduced, and the discharge is influenced; at high temperature, the oxygen evolution speed of the anode can be accelerated, more water is consumed, more H ions are generated, the corrosion speed of the anode is accelerated, and the service life of the lead-acid storage battery is shortened.
The residual capacity can reflect the state of the battery, and is an important parameter for representing the service life of the battery, and the specific process of monitoring the residual capacity 103 of the single lead-acid storage battery is as follows:
the discharge current of the single battery is monitored by using a current sensor, wherein the current sensor can be a Hall current sensor or a magnetic induction current sensor, and the current sensor is a sensor type which is suggested to be selected and is not limited to the types.
And analyzing the collected discharge current of the single battery by an ampere-hour integration method to obtain the residual electric quantity of the single battery.
The formula of the ampere-hour integration method is as follows:
Figure BDA0003145550840000091
therein, SOC0Is the SOC of the battery at the starting time, C is the actual capacity of the battery, eta is the temperature-dependent current correction factor, itThe charge current is positive during charging and negative during discharging.
The obtained charging current, cut-off voltage, battery temperature and remaining capacity of the single battery are analyzed by an intelligent algorithm 104 to obtain the working state of the single battery.
The intelligent algorithm 104 may be an artificial neural network or a BP neural network, and a single battery working state prediction model is constructed through the artificial neural network or the BP neural network, the single battery working state prediction model takes the charging current, the cutoff voltage, the battery temperature and the residual electric quantity of a single battery as input, and takes the working state of the single battery as output, and the working state of the single battery includes whether the residual life of the single battery meets the requirement, whether the single battery is full, and whether the single battery is over-discharged.
And inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model so as to obtain the working state of the single battery including whether the residual service life of the single battery meets the requirement, whether the single battery is full and whether the single battery is over-discharged.
The charge and discharge of the unit cells are controlled according to the obtained operation states of the unit cells, as shown in fig. 2.
When the single battery is in a full-charge state, the charging and discharging device stops charging the single battery, so that the single battery is prevented from being overcharged, and the service life of the single battery is prevented from being reduced.
When the single battery is in an overdischarge state, the charge and discharge device starts the rapid charge operation of the single battery, so that the single battery is prevented from being in the overdischarge state for a long time, and the service life of the single battery is prevented from being reduced.
When the single battery is in a non-full-charge state, the charging and discharging device is started to charge the single battery, so that the single battery is slowly charged to full charge, and the service life of the single battery is prevented from being reduced.
When the residual service life of the single battery meets the requirement of the battery pack, the charging and discharging device does not send alarm information and does not need to replace the single battery.
When the residual life of the single battery does not meet the requirement of the battery pack, the charging and discharging device gives an alarm, the single battery needs to be replaced in time, and the problem of battery pack accidents caused by the hidden trouble of the single battery is prevented.
The embodiment discloses a method for controlling charging and discharging of a single battery in a lead-acid storage battery energy storage station, which realizes monitoring of the state of a single battery by acquiring the charging current, the cut-off voltage, the temperature of the battery and the residual electric quantity of the single battery, can perform corresponding charging and discharging control according to the state of the single battery, realizes accurate charging and discharging control of the single battery, prolongs the service life of the single battery, solves the problem of wood barrel short plate of a battery pack, effectively reduces the waste of manpower and material resources caused by replacement of the single battery, simultaneously prevents the problems that the existing capacity balancing function is single and the operation level of the whole battery pack is influenced by a low-capacity battery, can effectively solve the problems of service life reduction and unstable power supply output of the whole storage battery pack caused by long-term operation of the single lead-acid battery, and ensures the stability of the output of the energy storage station participating peak clipping and valley filling of a main power grid, further ensuring the high-quality power supply of the power grid to the user, and having objective social and economic benefits.
The method and the device also analyze the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery, evaluate the service life of the single lead-acid battery, and alarm the single battery with the residual life not meeting the requirement, so that the single battery can be replaced in time, accidents caused by the faults of the single battery can be prevented from happening in the future, the accident probability of the energy storage power station is greatly reduced, and the method and the device have important social and economic benefits for ensuring the life safety of workers.
Example 2
In this embodiment, a single battery charge and discharge control system for a lead-acid battery energy storage station is disclosed, which includes:
the data acquisition module is used for acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery;
the single battery working state prediction module is used for inputting the acquired charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to acquire the working state of the single battery;
and the single battery charging and discharging control module is used for controlling the charging and discharging of the single battery according to the working state of the single battery.
Example 3
In this embodiment, an integrated battery management system for a lead-acid battery energy storage station is disclosed, comprising:
the data acquisition module is used for acquiring the current and the voltage of the battery pack, and the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single batteries forming the battery pack;
the control module is used for judging the working state of the battery pack according to the acquired current and voltage of the battery pack and controlling the charging and discharging of the battery pack according to the working state of the battery pack; and inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery, and controlling the charging and discharging of the single battery according to the working state of the single battery.
Furthermore, the control module is also used for analyzing the temperature of the single battery, acquiring the temperature gradient of the single battery, and predicting the temperature rise degree of the single battery according to the temperature gradient.
The integrated battery management system for the lead-acid storage battery energy storage station disclosed by the embodiment has a battery pack voltage and current monitoring function, an active equalization technology, a single lead-acid battery active equalization function, a single lead-acid battery service life estimation function, a single battery dynamic adjustment function and a fire-fighting strategy control function, as shown in fig. 3.
The voltage and current of the battery pack are monitored on line in real time through the Hall voltage and current sensors, and monitoring data can be transmitted to the monitoring platform to be displayed and recorded in real time.
The state of the battery pack is evaluated by monitoring the voltage and the current of the battery pack, whether the battery pack is fully charged or not is judged, the charging and discharging of the battery pack are controlled according to the state of the battery pack, and the battery pack is charged when the battery pack is not fully charged; when the battery pack is fully charged, the battery pack stops charging, so that all the battery packs are ensured to work in a normal state, normal and high-quality power supply output of the energy storage power station is ensured, the service life of the lead-acid battery pack of the whole energy storage power station can be prolonged, and the active equalization technical function of the management system is realized.
The active equalization technology of the single lead-acid battery of the management system refers to monitoring of the energy storage state of the single lead-acid battery, the single lead-acid battery is larger in size compared with a lithium battery, meanwhile, the quantity of the lead-acid batteries of the energy storage power stations is smaller compared with that of the lithium battery, and therefore voltage, current and temperature sensors smaller in size can be installed on the single lead-acid battery, the energy storage state of the single lead-acid battery can be monitored in real time on line, the single lead-acid battery which is not fully charged is charged, the single lead-acid battery which is over-charged is stopped to be charged, the service life of the single lead-acid battery is prolonged, and large amount of manpower and material resource consumption caused by replacement of a single problem battery is avoided.
The battery life of the single lead-acid battery is estimated by analyzing the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery through a single battery working state prediction model to obtain the working state of the single battery, including whether the residual life of the single battery meets the requirement, whether the single battery is full and whether the single battery is over-discharged.
The method comprises the steps of obtaining the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of a single battery, analyzing the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery to obtain the working state of the single battery, and adopting the method for controlling the charging and discharging of the single battery of the lead-acid storage battery energy storage station disclosed in embodiment 1 according to the specific process of controlling the charging and discharging of the single battery.
In addition, the integrated battery management system for the energy storage station of the lead-acid storage battery disclosed in this embodiment can also acquire the current, the terminal voltage and the battery temperature of the single battery through the data acquisition module, analyze the acquired current, the terminal voltage and the battery temperature through the control module, judge that the single battery has serious abnormal faults such as overvoltage, undervoltage, overcurrent (short circuit), leakage (insulation) and the like when the current, the terminal voltage and the battery temperature exceed corresponding set thresholds, disconnect the single battery and give an alarm when judging that the single battery has the above various abnormal faults, realize the automatic isolation of the faulty battery, improve the consistency of the battery, ensure the normal operation of the battery pack, and prolong the service life of the battery pack.
The dynamic adjustment and fire-fighting strategy control functions of the single battery are realized by combining the temperature field calculation of the single battery with a fire-fighting early warning evaluation method, and specifically the method comprises the following steps:
acquiring battery temperatures of different areas of a single battery;
analyzing the battery temperature of different regions of the single battery through the constructed fire-fighting early warning model based on the temperature field, and predicting the temperature rise degree of different regions of the single battery;
whether the single battery breaks down or not is predicted according to the predicted temperature rise degrees of different regions of the single battery, the monitoring system is triggered to continuously record the data of the single battery and display the data in a predicted fault state on a monitoring screen, when serious heating accident faults are predicted to occur, alarm information is timely sent out, and the automatic control execution device cuts off the single battery at the position, so that the faults are killed in a sprouting state practically, and the life safety of workers and the safe and stable operation of electric equipment are practically guaranteed.
The battery temperature of different regions of the single battery is analyzed through the built fire-fighting early warning model based on the temperature field, and the specific process of predicting the temperature rise degree of different regions of the single battery is as follows:
the battery temperature of each area is derived to obtain the temperature gradient of each area of the single battery;
comprehensively analyzing the temperature gradient of each area of the single battery to obtain the temperature change trend of the single battery;
and predicting the temperature rise degree of different regions of the single battery according to the temperature change trend of the single battery.
This embodiment obtains the temperature gradient in the different regions of battery cell through the battery temperature to the different regions of battery cell to the time derivative, and the degree, the scope that can predict battery cell temperature rising and whether can break down the hidden danger or not can be judged comprehensively to the trend of change of the temperature gradient in the different regions of battery cell.
The development trend of temperature in each area node can be obtained by comparing the temperature gradients of different position areas of the single battery, and the change trend of the temperature of the whole single battery can be obtained by combining the temperature, the time and the space positions, so that the temperature rise degree of different areas in the next hour or half hour of the single battery can be predicted according to the temperature change trend of the single battery, the prediction and the evaluation of the temperature fields of different areas of the single battery can be realized, if a certain area on the surface of the single battery is calculated to obtain the temperature rise degree in the second half hour, the temperature rise degree can exceed 100 ℃, the temperature rise can cause the faults of fire and the like, the set 100 ℃ is the alarm threshold value, and the system alarms to inform a worker to process the battery in time. If the staff does not intervene in time, the monitoring system can start the control device to cut off the single battery at the position, so that accidents are prevented.
The battery management system and the fire fighting system disclosed by the embodiment are integrated in the prefabricated battery compartment, so that the full life cycle of the battery pack and the single battery in the compartment can be effectively monitored and key data can be stored; the active equalization technology can be realized, all the battery packs are ensured to work in a normal state, the normal and high-quality power supply output of the energy storage power station is ensured, meanwhile, the service life of the lead-acid battery pack of the whole energy storage power station can be prolonged, and the high-efficiency energy storage power station has high economic value; the service life estimation and active equalization technology of the single lead-acid battery can be realized, the service life of the single battery is prolonged, the single battery with fault hidden danger can be found in time, an alarm signal is sent out in time, a worker is reminded to replace the single battery in time, the single battery with the fault is automatically cut off, and the occurrence of power supply accidents is avoided; the whole development process of the fault can be predicted in time through dynamic adjustment of the single battery and fire-fighting strategy control, operation and maintenance personnel are warned to investigate the hidden fault trouble in time, the system automatically cuts off the hidden fault trouble battery, and huge economic and social benefits are achieved in the aspects of guaranteeing life safety of workers and completely and stably operating electric equipment.
The battery management system disclosed in this embodiment realizes the charging control of the single battery and the judgment of the faulty battery based on the adaptive algorithm of the BP neural network, and automatically isolates the faulty battery, thereby improving the consistency of the battery and prolonging the service lives of the single battery and the battery pack; the temperature rise degree of different regions of the single battery is predicted through the built fire-fighting early warning model based on the temperature field, the single battery with the fire fault is judged, the single battery with the fire fault is linked with a monitoring signal of a battery management system, the single battery with the fire fault is automatically cut off, and the fire hidden danger is eliminated.
Example 4
In this embodiment, an electronic device is disclosed, which includes a memory, a processor, and computer instructions stored in the memory and executed on the processor, where the computer instructions, when executed by the processor, implement the steps of the method for controlling charging and discharging of battery cells in the lead-acid battery energy storage station disclosed in embodiment 1.
Example 5
In this embodiment, a computer-readable storage medium is disclosed, which is used for storing computer instructions, and when the computer instructions are executed by a processor, the steps of the method for controlling charging and discharging of the battery cells in the lead-acid storage battery energy storage station disclosed in embodiment 1 are completed.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (10)

1. A method for controlling charging and discharging of a battery monomer in a lead-acid storage battery energy storage station is characterized by comprising the following steps:
acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery;
inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery;
and controlling the charging and discharging of the single batteries according to the working states of the single batteries.
2. The method for controlling the charging and discharging of the single batteries in the energy storage station of the lead-acid storage battery according to claim 1, wherein the obtained charging current of the single batteries is the maximum charging current when the single batteries are charged; and the obtained cut-off voltage of the single battery is the voltage of the single battery after discharge.
3. The method for controlling the charge and discharge of the single battery in the lead-acid storage battery energy storage station according to claim 1, wherein the process of obtaining the residual electric quantity of the single battery comprises the following steps:
acquiring discharge current of the single battery;
and analyzing the obtained discharge current of the single battery by an ampere-hour integration method to obtain the residual electric quantity of the single battery.
4. The method for controlling the charging and discharging of the single batteries in the lead-acid storage battery energy storage station according to claim 1, wherein a prediction model of the working state of the single batteries adopts a BP neural network.
5. The method for controlling the charging and discharging of the single batteries in the lead-acid storage battery energy storage station according to claim 1, wherein the acquired working states of the single batteries comprise whether the residual lives of the single batteries meet requirements, whether the single batteries are full, and whether the single batteries are over-discharged.
6. The method for controlling the charging and discharging of the single batteries in the lead-acid storage battery energy storage station according to claim 5, wherein the specific process for controlling the charging and discharging of the single batteries according to the working states of the single batteries comprises the following steps:
when the single battery is in a full-charge state, stopping charging the single battery;
when the single battery is in a non-full state, charging the single battery;
when the single battery is in an overdischarge state, rapidly charging the single battery;
and when the service life of the single battery does not meet the requirement, giving an alarm.
7. The utility model provides a lead acid battery energy storage station battery monomer control system that charges and discharges which characterized in that includes:
the data acquisition module is used for acquiring the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single battery;
the single battery working state prediction module is used for inputting the acquired charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to acquire the working state of the single battery;
and the single battery charging and discharging control module is used for controlling the charging and discharging of the single battery according to the working state of the single battery.
8. An integrated battery management system for a lead-acid battery energy storage station, comprising:
the data acquisition module is used for acquiring the current and the voltage of the battery pack, and the charging current, the cut-off voltage, the battery temperature and the residual electric quantity of the single batteries forming the battery pack;
the control module is used for judging the working state of the battery pack according to the acquired current and voltage of the battery pack and controlling the charging and discharging of the battery pack according to the working state of the battery pack; and inputting the obtained charging current, cut-off voltage, battery temperature and residual electric quantity of the single battery into a trained single battery working state prediction model to obtain the working state of the single battery, and controlling the charging and discharging of the single battery according to the working state of the single battery.
9. An electronic device comprising a memory and a processor and computer instructions stored on the memory and executed on the processor, the computer instructions when executed by the processor performing the steps of a method according to any one of claims 1 to 6.
10. A computer-readable storage medium storing computer instructions which, when executed by a processor, perform the steps of a method according to any one of claims 1 to 6.
CN202110752747.2A 2021-07-02 2021-07-02 Method and system for controlling charge and discharge of battery monomer of lead-acid storage battery energy storage station Active CN113612269B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110752747.2A CN113612269B (en) 2021-07-02 2021-07-02 Method and system for controlling charge and discharge of battery monomer of lead-acid storage battery energy storage station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110752747.2A CN113612269B (en) 2021-07-02 2021-07-02 Method and system for controlling charge and discharge of battery monomer of lead-acid storage battery energy storage station

Publications (2)

Publication Number Publication Date
CN113612269A true CN113612269A (en) 2021-11-05
CN113612269B CN113612269B (en) 2023-06-27

Family

ID=78303924

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110752747.2A Active CN113612269B (en) 2021-07-02 2021-07-02 Method and system for controlling charge and discharge of battery monomer of lead-acid storage battery energy storage station

Country Status (1)

Country Link
CN (1) CN113612269B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113991718A (en) * 2021-11-19 2022-01-28 上海沪臻智能科技有限公司 Lead-acid battery peak clipping and valley filling self-adaptive system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101966820A (en) * 2010-08-26 2011-02-09 清华大学 On-line monitoring method for self-adaptively correcting lithium ion battery state-of-charge
CN107785624A (en) * 2016-08-30 2018-03-09 郑州思辩科技有限公司 A kind of method for assessing lithium battery performance
US20190157891A1 (en) * 2017-11-20 2019-05-23 The Trustees Of Columbia University In The City Of New York Neural-network state-of-charge estimation
CN111638465A (en) * 2020-05-29 2020-09-08 浙大宁波理工学院 Lithium battery health state estimation method based on convolutional neural network and transfer learning
CN112881930A (en) * 2021-01-19 2021-06-01 北京昆兰新能源技术有限公司 Energy storage battery health management prediction method and system based on Internet of things

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101966820A (en) * 2010-08-26 2011-02-09 清华大学 On-line monitoring method for self-adaptively correcting lithium ion battery state-of-charge
CN107785624A (en) * 2016-08-30 2018-03-09 郑州思辩科技有限公司 A kind of method for assessing lithium battery performance
US20190157891A1 (en) * 2017-11-20 2019-05-23 The Trustees Of Columbia University In The City Of New York Neural-network state-of-charge estimation
CN111638465A (en) * 2020-05-29 2020-09-08 浙大宁波理工学院 Lithium battery health state estimation method based on convolutional neural network and transfer learning
CN112881930A (en) * 2021-01-19 2021-06-01 北京昆兰新能源技术有限公司 Energy storage battery health management prediction method and system based on Internet of things

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
曾求勇;张鑫;范兴明;: "电动汽车动力电池荷电状态估计方法探讨", 电测与仪表, no. 24 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113991718A (en) * 2021-11-19 2022-01-28 上海沪臻智能科技有限公司 Lead-acid battery peak clipping and valley filling self-adaptive system and method

Also Published As

Publication number Publication date
CN113612269B (en) 2023-06-27

Similar Documents

Publication Publication Date Title
CN109932661B (en) Battery state monitoring method and device
CN110707804B (en) Energy storage and standby power device with online test function and test method
CN110380144B (en) Mixed coordination control method and system for retired lithium iron phosphate and ternary lithium battery
CN110311179A (en) A kind of method of energy storage battery system intelligent early-warning
CN210283943U (en) Safe charging system of lithium battery replacement cabinet
CN106183857B (en) A kind of dual battery system double cell cycle-index control method and system
CN112462289A (en) Storage battery pack online capacity checking management device
CN112467831A (en) Remote-program online capacity check management system for storage battery pack
CN108282007B (en) Communication battery module charging current limiting strategy
CN104157918A (en) Method and device for performing redundant reassembling on storage batteries
CN111123148B (en) Method and equipment for judging short circuit in metal secondary battery
CN107219467B (en) Transformer substation storage battery nuclear capacity device with sulfur removal and repair functions and method
CN113391210A (en) Lithium battery BMS distributed data analysis management system
CN106505694A (en) A kind of management system of intelligent battery group and control method
CN110018422B (en) Battery management method and device
CN106026151B (en) Scheduling method and device for electric vehicle battery storage and replacement station
CN105667326A (en) Hybrid electric vehicle charging system with active protection function and charging method for hybrid electric vehicle charging system
Linru et al. Analysis on charging safety and optimization of electric vehicles
CN109450027A (en) Lithium ion battery equalization methods
CN116250110A (en) Battery charging method, controller, battery management system, battery and power utilization device
CN113612269B (en) Method and system for controlling charge and discharge of battery monomer of lead-acid storage battery energy storage station
CN110780225B (en) Battery pack internal short circuit detection method and device and electric automobile
CN114204658A (en) Storage battery pack online capacity checking system
CN204538792U (en) A kind of parallel power supply system and power module
CN104143654A (en) Floating charge protection type lithium iron phosphate storage battery and application thereof to direct current system of electric power engineering

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant