CN109066749A - Energy Management System applied to photovoltaic energy storage system - Google Patents
Energy Management System applied to photovoltaic energy storage system Download PDFInfo
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- CN109066749A CN109066749A CN201811056749.2A CN201811056749A CN109066749A CN 109066749 A CN109066749 A CN 109066749A CN 201811056749 A CN201811056749 A CN 201811056749A CN 109066749 A CN109066749 A CN 109066749A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 238000011156 evaluation Methods 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims description 72
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/383—
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention discloses the Energy Management System applied to photovoltaic energy storage system, including battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module, battery data library, battery management server and display and control terminal, management server is connect with battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module, battery data library and display and control terminal respectively.The present invention is by battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module and combines battery management server, to obtain battery surface temperature, charging and discharging currents and battery capacity and hold the numerical value between voltage, according to the Information Statistics battery life evaluation coefficient of acquisition, and the battery life evaluation coefficient of statistics is sent to display and control terminal, the service life that battery is intuitively understood convenient for administrative staff substantially increases the service life of battery and the balance of photovoltaic energy storage system power supply.
Description
Technical field
The invention belongs to photovoltaic energy storage technical field, it is related to the Energy Management System applied to photovoltaic energy storage system.
Background technique
Photovoltaic generating system refers to the electricity generation system it is not necessary that luminous energy to be directly changed into electric energy by thermal process, photovoltaic power generation
The main component of system is solar battery, battery, controller and inverter.
Battery is also photovoltaic energy storage system, and it is energy storage center that battery, which is used to store the direct current of solar battery conversion,
Existing photovoltaic energy storage system is influenced vulnerable to natural causes such as illumination, temperature, and output power is unstable, intermittent big, is existed
It powers unbalanced phenomenon, meanwhile, after battery is installed, the temperature of battery surface can not be understood, electric current etc. uses battery
Caused by influence, seriously affected the service life of battery, be not easy to be managed the energy content of battery, meanwhile, staff without
The service life of method electrolytic cell timely replaces battery, influences the normal operation of photovoltaic system, in order to solve problem above, existing
Design is applied to the Energy Management System of photovoltaic energy storage system.
Summary of the invention
The purpose of the present invention is to provide the Energy Management System applied to photovoltaic energy storage system, solve existing photovoltaic
For energy-storage system during battery management, existing battery power supply balance is poor, efficiency of management difference problem, and can not have
The service life of effect ground assessment battery.
The purpose of the present invention can be achieved through the following technical solutions:
Applied to the Energy Management System of photovoltaic energy storage system, including battery status monitoring modular, charge and discharge statistical module,
Equilibrium degree Detection & Controling module, battery data library, battery management server and display and control terminal, management server difference
With battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module, battery data library and display and control
Terminal connection；
The battery status monitoring modular electricity current for real-time monitoring battery, the temperature of battery surface and the electricity by monitoring
Pond current electric quantity, the temperature of battery surface are sent to battery management server；
Charge and discharge statistical module judges battery in charge or discharge for working condition locating for real-time statistics battery
Current information, and the accumulated time of charge or discharge is accordingly counted, and the time of the working condition of battery and statistics is sent
To battery management server；
Equilibrium degree Detection & Controling module is bi-directionally connected with battery management server, equilibrium degree Detection & Controling module
For obtaining the capacity in battery and the end voltage at battery both ends in real time, and by received battery capacity and battery both ends
End voltage be sent to battery management server, and receive battery management server transmission battery balanced degree regulation and control instruction, with
Reduce the difference between battery capacity and battery terminal voltage；
Battery data library is for storing the standard temperature of the essential information for the load being connected with battery, the battery surface of setting
Maximum current when bottom valve value and battery charging and discharging, the temperature for the threshold temperature that is above standard, the temperature difference exceeded are corresponding
Danger coefficient is different, and the temperature for being more than is higher, then the corresponding danger coefficient of the temperature for being more than is higher, and the essential information of load includes
Voltage rating, rated current, rated power of load etc.；
The temperature of the battery that battery management server reception battery status monitoring modular is sent current electricity and battery surface
Degree, whether the electricity current to received battery is less than the minimum discharge electricity amount of battery, if being less than, battery management server is sent
Control instruction controls battery and does not provide electricity for load to display and control terminal, and presses to the temperature of received battery surface
It is divided according to the period T of acquisition, counts the mean temperature of battery surface in each period, constitute period temperature set W
(w1, w2 ..., wh), wh are expressed as the mean temperature of battery surface in h-th of period, will be in battery surface in each period
Mean temperature and database in the normal temperature threshold values of battery standard that stores compared one by one, obtain period temperature pair
Than set W ', (h), w ' h is expressed as the electricity of the mean temperature of battery surface and setting in h-th of period by w ' 1, w ' 2 ..., w '
The reduced value of the normal temperature threshold values of pool surface, if the mean temperature of battery surface is less than the battery of setting in h-th of period
The normal temperature threshold values on surface, then w ' h takes 0, conversely, w ' h takes 1, according to temperature in each period in period temperature comparisons set
The corresponding danger coefficient of the different temperatures that stores compares in degree reduced value and database, to obtain temperature danger coefficient set
(h), kw ' h is expressed as the battery of the mean temperature of battery surface and setting in h-th of period to KW ' by kw ' 1, kw ' 2 ..., kw '
Danger coefficient corresponding to the reduced value of the normal temperature threshold values on surface, battery management server gather period temperature comparisons
Mean temperature in the mean temperature and subsequent time period of battery surface in each period is compared and count temperature when
Between change rate in section T, obtain rate temperature change set Δ W (Δ w1, Δ w2 ..., Δ w (h-1)), Δ w (h-1) is indicated
For the rate of change of mean temperature in h-th of period and mean temperature in the h-1 period；
Battery management server receives battery charge, the charging time, discharge current that charge and discharge statistical module is sent
And discharge time, to received charging current and discharge current respectively with the charging current threshold values of setting and discharge current threshold values into
Row comparison, if charging current is less than charging current threshold values and discharge current is less than discharge current threshold values, battery management server
According to the essential information of the load being connected with battery stored in battery data library, statistics is supported on consumption in the unit time
Electricity, and be the electricity being filled in the unit time according to battery charge and charging time statistics statistics battery, if charging electricity
Stream is less than charging current threshold values or discharge current is less than discharge current threshold values, and battery management server sends control instruction and extremely shows
With controlling terminal, the electric current for being more than current threshold is controlled to adjust, so that charging current is less than charging current threshold values and puts
Electric current is less than discharge current threshold values；
The capacity and battery two in battery that battery management server real-time reception equilibrium degree Detection & Controling module is sent
The end voltage at end judges the numerical value of the end voltage at cell contents amount and battery both ends, if the end of cell contents amount and battery both ends
The numerical value of voltage is different, then battery management server sends equilibrium degree regulation and control instruction to equilibrium degree Detection & Controling module, to subtract
Difference between baby battery capacity and battery terminal voltage；
Meanwhile battery management server is according to period temperature comparisons' set W ', temperature danger coefficient set KW ', temperature
Rate of change set Δ W, charging and discharging currents whether be more than setting current threshold and the end of cell contents amount and battery both ends
Difference between voltage value, count battery life evaluation coefficient, and by the battery life evaluation coefficient of statistics be sent to display with
Controlling terminal；
Display and control terminal is used to receive the battery life evaluation coefficient of battery management server transmission and is shown,
And current control instruction and battery output control instruction that reception battery management server is sent, respectively to more than current threshold
Electric current and to battery capacity be less than minimum discharge electricity amount when, controlled.
Further, the battery status monitoring modular includes electricity acquiring unit, temperature acquiring unit and the first processing
Device, first processor are connect with electricity acquiring unit, temperature acquiring unit, electric discharge statistic unit and timing unit respectively；
The electricity acquiring unit for obtaining the electricity in energy-storage battery, and the electricity that the battery of statistics is current in real time
It is sent to first processor；Temperature acquiring unit is temperature sensor, for obtaining the temperature of battery surface in real time, and be will acquire
The temperature of battery surface be sent to first processor；The current electricity of the battery that first processor reception electricity acquiring unit is sent
Amount, receives the temperature for the battery surface that temperature acquiring unit is sent, and by the current electricity of received battery and battery surface
Temperature is sent to battery management server.
Further, the charge and discharge statistical module includes electric discharge statistic unit, electric discharge timing unit, charging counts single
Member, charging timing unit and second processor, second processor are united with electric discharge statistic unit, electric discharge timing unit, charging respectively
Count unit, charging timing unit connection；
Electric discharge statistic unit is for judging whether battery is in discharge condition, if battery is in discharge condition, counts battery
Electric current in discharge loop, and the current information of battery discharge is sent to second processor, electric discharge timing unit is for adding up
The time of battery discharge, and accumulative battery discharge time is sent to second processor；Charging statistic unit is for judging electricity
Whether pond is in charged state, if battery is in charged state, counts the electric current in battery charge circuit, and battery is charged back
Current information in road is sent to second processor；Charging timing unit is used to add up the time of battery charging, and will be accumulative
Battery charge time is sent to second processor；Second processor is used to receive the electricity for the battery discharge that electric discharge statistic unit is sent
The electric current for the battery charging that stream information, the discharge time for receiving electric discharge timing unit transmission, reception charging statistic unit are sent is believed
Breath, receive charging timing unit send charging time, and by received battery discharge current, discharge time, charging current and
Charging time is sent to battery management server.
Further, the equilibrium degree Detection & Controling module includes battery capacity acquiring unit, battery terminal voltage detection
Unit and balanced regulation unit, battery capacity acquiring unit for obtaining the capacity in battery in real time, and the battery that will acquire holds
Amount is sent to battery management server, and battery terminal voltage detection unit is used to obtain the end voltage at battery both ends in real time, and will be electric
The end voltage at pond both ends is sent to battery management server, meanwhile, equilibrium regulation unit is for receiving battery management server hair
The battery balanced degree regulation and control instruction sent, is adjusted battery capacity, to reduce the difference between battery capacity and battery terminal voltage,
To improve the service life of battery.
Further, the battery life evaluation coefficient formulas is
W ' h is expressed as the normal temperature threshold values of the battery surface of the mean temperature and setting of battery surface in h-th of period
Reduced value, kw ' h are expressed as the normal temperature valve of the battery surface of the mean temperature and setting of battery surface in h-th of period
Danger coefficient corresponding to the reduced value of value, Δ w (h-1) are expressed as mean temperature and the h-1 period in h-th of period
The rate of change of interior mean temperature, Δ IIt fillsIt is expressed as the numerical value that battery charge is more than charging current threshold values, Δ IIt putsIt is expressed as
Battery discharge current is more than the numerical value of discharge current threshold values, when battery charge is less than the numerical value of charging current threshold values, Δ
IIt fills0 is taken, when battery charge is less than the numerical value of charging current threshold values, Δ IIt puts0 is taken, Δ U is expressed as cell contents amount and electricity
Difference between the end voltage value at pond both ends.
Beneficial effects of the present invention:
Energy Management System provided by the invention applied to photovoltaic energy storage system, passes through equilibrium degree Detection & Controling module
The relationship held between voltage for capableing of real-time detection battery capacity and battery both ends extends electricity convenient for reducing the disequilibrium of battery
Pond service life, and by battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module and combine electricity
Pond management server, to obtain battery surface temperature, charging and discharging currents and battery capacity and hold the numerical value between voltage, according to obtaining
The Information Statistics battery life evaluation coefficient taken, and the battery life evaluation coefficient of statistics is sent to display and control terminal,
The service life that battery is intuitively understood convenient for administrative staff improves the energy management efficiency of battery, substantially increases battery
Service life and photovoltaic energy storage system power supply balance.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the schematic diagram for the Energy Management System that the present invention is applied to photovoltaic energy storage system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of Energy Management System applied to photovoltaic energy storage system, including battery status monitoring modular,
Charge and discharge statistical module, equilibrium degree Detection & Controling module, battery data library, battery management server and display and control are whole
End, management server respectively with battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module, battery
Database is connected with display and control terminal；
The battery status monitoring modular electricity current for real-time monitoring battery, the temperature of battery surface and the electricity by monitoring
Pond current electric quantity, the temperature of battery surface are sent to battery management server；
Battery status monitoring modular includes electricity acquiring unit, temperature acquiring unit and first processor, first processor
It is connect respectively with electricity acquiring unit, temperature acquiring unit, electric discharge statistic unit and timing unit, the electricity acquiring unit is used
Electricity in acquisition energy-storage battery in real time, and the current electricity of the battery of statistics is sent to first processor；Temperature obtains
Unit is temperature sensor, and for obtaining the temperature of battery surface in real time, and the temperature for the battery surface that will acquire is sent to
One processor；The current electricity of the battery that first processor reception electricity acquiring unit is sent, receives temperature acquiring unit and sends
Battery surface temperature, and the temperature of the current electricity of received battery and battery surface is sent to battery management service
Device；
Charge and discharge statistical module judges battery in charge or discharge for working condition locating for real-time statistics battery
Current information, and the accumulated time of charge or discharge is accordingly counted, and the time of the working condition of battery and statistics is sent
To battery management server；
Charge and discharge statistical module includes electric discharge statistic unit, electric discharge timing unit, charging statistic unit, charging timing unit
And second processor, second processor respectively with electric discharge statistic unit, electric discharge timing unit, charging statistic unit, chargometer when
Unit connection, electric discharge statistic unit is for judging whether battery is in discharge condition, if battery is in discharge condition, counts battery
Electric current in discharge loop, and the current information of battery discharge is sent to second processor, electric discharge timing unit is for adding up
The time of battery discharge, and accumulative battery discharge time is sent to second processor；Charging statistic unit is for judging electricity
Whether pond is in charged state, if battery is in charged state, counts the electric current in battery charge circuit, and battery is charged back
Current information in road is sent to second processor；Charging timing unit is used to add up the time of battery charging, and will be accumulative
Battery charge time is sent to second processor；Second processor is used to receive the electricity for the battery discharge that electric discharge statistic unit is sent
The electric current for the battery charging that stream information, the discharge time for receiving electric discharge timing unit transmission, reception charging statistic unit are sent is believed
Breath, receive charging timing unit send charging time, and by received battery discharge current, discharge time, charging current and
Charging time is sent to battery management server；
Equilibrium degree Detection & Controling module is bi-directionally connected with battery management server, equilibrium degree Detection & Controling module
For obtaining the capacity in battery and the end voltage at battery both ends in real time, and by received battery capacity and battery both ends
End voltage be sent to battery management server, and receive battery management server transmission battery balanced degree regulation and control instruction, with
Reduce the difference between battery capacity and battery terminal voltage；
Equilibrium degree Detection & Controling module includes battery capacity acquiring unit, battery terminal voltage detection unit and balanced regulation
Unit, battery capacity acquiring unit for obtaining the capacity in battery in real time, and the battery capacity that will acquire is sent to cell tube
Server is managed, battery terminal voltage detection unit for obtaining the end voltage at battery both ends in real time, and by the end voltage at battery both ends
It is sent to battery management server, meanwhile, equilibrium regulation unit is used to receive the battery balanced degree of battery management server transmission
Battery capacity is adjusted in regulation and control instruction, to reduce the difference between battery capacity and battery terminal voltage, to improve making for battery
Use the service life；
Battery data library is for storing the standard temperature of the essential information for the load being connected with battery, the battery surface of setting
Maximum current when bottom valve value and battery charging and discharging, the temperature for the threshold temperature that is above standard, the temperature difference exceeded are corresponding
Danger coefficient is different, and the temperature for being more than is higher, then the corresponding danger coefficient of the temperature for being more than is higher, and the essential information of load includes
Voltage rating, rated current, rated power of load etc.；
The temperature of the battery that battery management server reception battery status monitoring modular is sent current electricity and battery surface
Degree, whether the electricity current to received battery is less than the minimum discharge electricity amount of battery, if being less than, battery management server is sent
Control instruction controls battery and does not provide electricity for load to display and control terminal, and presses to the temperature of received battery surface
It is divided according to the period T of acquisition, counts the mean temperature of battery surface in each period, constitute period temperature set W
(w1, w2 ..., wh), wh are expressed as the mean temperature of battery surface in h-th of period, will be in battery surface in each period
Mean temperature and database in the normal temperature threshold values of battery standard that stores compared one by one, obtain period temperature pair
Than set W ', (h), w ' h is expressed as the electricity of the mean temperature of battery surface and setting in h-th of period by w ' 1, w ' 2 ..., w '
The reduced value of the normal temperature threshold values of pool surface, if the mean temperature of battery surface is less than the battery of setting in h-th of period
The normal temperature threshold values on surface, then w ' h takes 0, conversely, w ' h takes 1, according to temperature in each period in period temperature comparisons set
The corresponding danger coefficient of the different temperatures that stores compares in degree reduced value and database, to obtain temperature danger coefficient set
(h), kw ' h is expressed as the battery of the mean temperature of battery surface and setting in h-th of period to KW ' by kw ' 1, kw ' 2 ..., kw '
Danger coefficient corresponding to the reduced value of the normal temperature threshold values on surface, battery management server gather period temperature comparisons
Mean temperature in the mean temperature and subsequent time period of battery surface in each period is compared and count temperature when
Between change rate in section T, obtain rate temperature change set Δ W (Δ w1, Δ w2 ..., Δ w (h-1)), Δ w (h-1) is indicated
For the rate of change of mean temperature in h-th of period and mean temperature in the h-1 period；
Battery management server receives battery charge, the charging time, discharge current that charge and discharge statistical module is sent
And discharge time, to received charging current and discharge current respectively with the charging current threshold values of setting and discharge current threshold values into
Row comparison, if charging current is less than charging current threshold values and discharge current is less than discharge current threshold values, battery management server
According to the essential information of the load being connected with battery stored in battery data library, statistics is supported on consumption in the unit time
Electricity, and be the electricity being filled in the unit time according to battery charge and charging time statistics statistics battery, if charging electricity
Stream is less than charging current threshold values or discharge current is less than discharge current threshold values, and battery management server sends control instruction and extremely shows
With controlling terminal, the electric current for being more than current threshold is controlled to adjust, so that charging current is less than charging current threshold values and puts
Electric current is less than discharge current threshold values；
The capacity and battery two in battery that battery management server real-time reception equilibrium degree Detection & Controling module is sent
The end voltage at end judges the numerical value of the end voltage at cell contents amount and battery both ends, if the end of cell contents amount and battery both ends
The numerical value of voltage is different, then battery management server sends equilibrium degree regulation and control instruction to equilibrium degree Detection & Controling module, to subtract
Difference between baby battery capacity and battery terminal voltage；
Meanwhile battery management server is according to period temperature comparisons' set W ', temperature danger coefficient set KW ', temperature
Rate of change set Δ W, charging and discharging currents whether be more than setting current threshold and the end of cell contents amount and battery both ends
Difference between voltage value, counts battery life evaluation coefficient, and the battery life evaluation coefficient formulas isW ' h is expressed as battery in h-th of period
The reduced value of the normal temperature threshold values of the battery surface of the mean temperature and setting on surface, kw ' h were expressed as in h-th of period
Danger coefficient corresponding to the reduced value of the normal temperature threshold values of the battery surface of the mean temperature and setting of battery surface, Δ w
(h-1) rate of change of mean temperature and mean temperature in the h-1 period in h-th of period, Δ I are expressed asIt fillsIt indicates
It is more than the numerical value of charging current threshold values, Δ I for battery chargeIt putsBattery discharge current is expressed as more than discharge current threshold values
Numerical value, when battery charge is less than the numerical value of charging current threshold values, Δ IIt fills0 is taken, when battery charge is less than charging electricity
When flowing the numerical value of threshold values, Δ IIt puts0, Δ U is taken to be expressed as the difference between cell contents amount and the end voltage value at battery both ends, battery
Life appraisal coefficient is higher, shows that the service life workable for battery is higher, and battery management server is by the battery life evaluation of statistics
Coefficient is sent to display and control terminal；
Display and control terminal is used to receive the battery life evaluation coefficient of battery management server transmission and is shown,
And the current control instruction and battery output control instruction of battery management server transmission are received, current control instruction is to more than electricity
The electric current of stream threshold values is controlled, so that charging current is less than charging current threshold values and discharge current is less than discharge current threshold values,
When battery output control instruction is less than minimum discharge electricity amount to battery capacity, control battery is not load supplying.
Energy Management System provided by the invention applied to photovoltaic energy storage system, passes through equilibrium degree Detection & Controling module
The relationship held between voltage for capableing of real-time detection battery capacity and battery both ends extends electricity convenient for reducing the disequilibrium of battery
Pond service life, and by battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module and combine electricity
Pond management server, to obtain battery surface temperature, charging and discharging currents and battery capacity and hold the numerical value between voltage, according to obtaining
The Information Statistics battery life evaluation coefficient taken, and the battery life evaluation coefficient of statistics is sent to display and control terminal,
The service life that battery is intuitively understood convenient for administrative staff improves the energy management efficiency of battery, substantially increases battery
Service life and photovoltaic energy storage system power supply balance.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or is substituted in a similar manner, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (5)
1. being applied to the Energy Management System of photovoltaic energy storage system, it is characterised in that: including battery status monitoring modular, charge and discharge
Statistical module, equilibrium degree Detection & Controling module, battery data library, battery management server and display and control terminal, management
Server respectively with battery status monitoring modular, charge and discharge statistical module, equilibrium degree Detection & Controling module, battery data library and
Display and control terminal connection；
Battery status monitoring modular for the current electricity of real-time monitoring battery, battery surface temperature and the battery of monitoring is worked as
Preceding electricity, battery surface temperature be sent to battery management server；
Charge and discharge statistical module judges electric current of the battery in charge or discharge for working condition locating for real-time statistics battery
Information, and the accumulated time of charge or discharge is accordingly counted, and the time of the working condition of battery and statistics is sent to electricity
Pond management server；
Equilibrium degree Detection & Controling module is bi-directionally connected with battery management server, and equilibrium degree Detection & Controling module is used for
The end voltage of the capacity and battery both ends in battery is obtained in real time, and by the end of capacity and battery both ends in received battery
Voltage is sent to battery management server, and receives the battery balanced degree regulation and control instruction of battery management server transmission, to reduce
Difference between battery capacity and battery terminal voltage；
Battery data library is for storing the normal temperature valve of the essential information for the load being connected with battery, the battery surface of setting
Maximum current when value and battery charging and discharging, the temperature for the threshold temperature that is above standard, the different corresponding danger of the temperature exceeded
Coefficient is different, and the temperature for being more than is higher, then the corresponding danger coefficient of the temperature for being more than is higher, and the essential information of load includes load
Voltage rating, rated current, rated power etc.；
The temperature of the battery that battery management server reception battery status monitoring modular is sent current electricity and battery surface is right
Whether the current electricity of received battery is less than the minimum discharge electricity amount of battery, if being less than, battery management server sends control
Instruction controls battery and does not provide electricity for load to display and control terminal, and to the temperature of received battery surface according to adopting
The period T of collection is divided, and counts the mean temperature of battery surface in each period, constitute period temperature set W (w1,
W2 ..., wh), wh is expressed as the mean temperature of battery surface in h-th of period, will be flat in battery surface in each period
The normal temperature threshold values of the battery standard stored in equal temperature and database is compared one by one, obtains period temperature comparisons collection
Closing W ', (h), w ' h is expressed as the battery table of the mean temperature of battery surface and setting in h-th of period by w ' 1, w ' 2 ..., w '
The reduced value of the normal temperature threshold values in face, if the mean temperature of battery surface is less than the battery surface of setting in h-th of period
Normal temperature threshold values, then w ' h takes 0, conversely, w ' h takes 1, according to temperature pair in each period in period temperature comparisons set
The corresponding danger coefficient of the different temperatures stored in ratio and database compares, to obtain temperature danger coefficient set KW '
(h), kw ' h is expressed as the battery table of the mean temperature of battery surface and setting in h-th of period by kw ' 1, kw ' 2 ..., kw '
Danger coefficient corresponding to the reduced value of the normal temperature threshold values in face, battery management server gathers period temperature comparisons will
Mean temperature in each period in the mean temperature and subsequent time period of battery surface compares and counts temperature in the time
Change rate in section T, obtains rate temperature change set Δ W (Δ w1, Δ w2 ..., Δ w (h-1)), Δ w (h-1) is expressed as
The rate of change of mean temperature and mean temperature in the h-1 period in h-th of period；
Battery management server receives the battery charge that charge and discharge statistical module sends, the charging time, discharge current and puts
The electric time carries out pair received charging current and discharge current with the charging current threshold values of setting and discharge current threshold values respectively
Than, if charging current is less than charging current threshold values and discharge current and is less than discharge current threshold values, battery management server according to
The essential information of the load being connected with battery stored in battery data library, statistics are supported on the electricity consumed in the unit time
Amount, and be the electricity being filled in the unit time according to battery charge and charging time statistics statistics battery, if charging current
Be less than discharge current threshold values less than charging current threshold values or discharge current, battery management server send control instruction to display with
Controlling terminal controls to adjust the electric current for being more than current threshold, so that charging current is less than charging current threshold values and electric discharge
Electric current is less than discharge current threshold values；
The capacity and battery both ends that battery management server real-time reception equilibrium degree Detection & Controling module is sent in battery
Voltage is held, the numerical value of the end voltage at cell contents amount and battery both ends is judged, if the end voltage of cell contents amount and battery both ends
Numerical value it is different, then battery management server sends equilibrium degree regulation and control instruction to equilibrium degree Detection & Controling module, to reduce electricity
Difference between tankage and battery terminal voltage；
Meanwhile battery management server is according to period temperature comparisons' set W ', temperature danger coefficient set KW ', temperature change
Whether rate set Δ W, charging and discharging currents are more than the current threshold of setting and the end voltage of cell contents amount and battery both ends
Difference between numerical value counts battery life evaluation coefficient, and the battery life evaluation coefficient of statistics is sent to display and control
Terminal；
Display and control terminal is used to receive the battery life evaluation coefficient of battery management server transmission and is shown, and connects
The current control instruction and battery output control instruction that battery management server is sent are received, respectively to the electric current for being more than current threshold
And it when being less than minimum discharge electricity amount to battery capacity, is controlled.
2. the Energy Management System according to claim 1 applied to photovoltaic energy storage system, it is characterised in that: the battery
State monitoring module includes electricity acquiring unit, temperature acquiring unit and first processor, and first processor is obtained with electricity respectively
Unit, temperature acquiring unit, electric discharge statistic unit is taken to connect with timing unit；
The electricity acquiring unit is sent for obtaining the electricity in energy-storage battery in real time, and by the current electricity of the battery of statistics
To first processor；Temperature acquiring unit is temperature sensor, for obtaining the temperature of battery surface in real time, and the electricity that will acquire
The temperature of pool surface is sent to first processor；The current electricity of the battery that first processor reception electricity acquiring unit is sent,
The temperature for the battery surface that temperature acquiring unit is sent is received, and by the temperature of received battery current electricity and battery surface
It is sent to battery management server.
3. the Energy Management System according to claim 1 applied to photovoltaic energy storage system, it is characterised in that: the charge and discharge
Electric statistical module includes electric discharge statistic unit, electric discharge timing unit, charging statistic unit, charging timing unit and second processing
Device, second processor are connect with electric discharge statistic unit, electric discharge timing unit, charging statistic unit, charging timing unit respectively；
Electric discharge statistic unit is for judging whether battery is in discharge condition, if battery is in discharge condition, counts battery discharge
Electric current in circuit, and the current information of battery discharge is sent to second processor, electric discharge timing unit is for adding up battery
The time of electric discharge, and accumulative battery discharge time is sent to second processor；Charging statistic unit is for judging that battery is
It is no to be in charged state, if battery is in charged state, the electric current in battery charge circuit is counted, and will be in battery charge circuit
Current information be sent to second processor；Charging timing unit is used to add up the time of battery charging, and the battery that will add up
Charging time is sent to second processor；Second processor is used to receive the electric current letter for the battery discharge that electric discharge statistic unit is sent
Breath, the current information for receiving the battery charging that charging statistic unit is sent, connects the discharge time for receiving electric discharge timing unit transmission
Receive charging timing unit send charging time, and by received battery discharge current, discharge time, charging current and charging when
Between be sent to battery management server.
4. the Energy Management System according to claim 1 applied to photovoltaic energy storage system, it is characterised in that: the equilibrium
Degree Detection & Controling module includes that battery capacity acquiring unit, battery terminal voltage detection unit and balanced regulation unit, battery hold
Acquiring unit is measured for obtaining the capacity in battery in real time, and the battery capacity that will acquire is sent to battery management server, electricity
The end voltage at battery both ends is sent to cell tube for obtaining the end voltage at battery both ends in real time by pond terminal voltage detecting unit
Server is managed, meanwhile, equilibrium regulation unit is used to receive the battery balanced degree regulation and control instruction of battery management server transmission, to electricity
Tankage is adjusted, to reduce the difference between battery capacity and battery terminal voltage, to improve the service life of battery.
5. the Energy Management System according to claim 1 applied to photovoltaic energy storage system, it is characterised in that: the battery
Life appraisal coefficient formulas isw′h
It is expressed as the reduced value of the normal temperature threshold values of the battery surface of the mean temperature and setting of battery surface in h-th of period,
Kw ' h is expressed as the comparison of the normal temperature threshold values of the battery surface of the mean temperature and setting of battery surface in h-th of period
The corresponding danger coefficient of value, Δ w (h-1) are expressed as mean temperature and temperature average in the h-1 period in h-th of period
The rate of change of degree, Δ IIt fillsIt is expressed as the numerical value that battery charge is more than charging current threshold values, Δ IIt putsIt is expressed as battery discharge
Electric current is more than the numerical value of discharge current threshold values, when battery charge is less than the numerical value of charging current threshold values, Δ IIt fills0 is taken, when
When battery charge is less than the numerical value of charging current threshold values, Δ IIt puts0, Δ U is taken to be expressed as cell contents amount and battery both ends
Hold the difference between voltage value.
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