CN108899971A - Micro-grid energy storage system battery pack balancing monitoring device and method - Google Patents
Micro-grid energy storage system battery pack balancing monitoring device and method Download PDFInfo
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- CN108899971A CN108899971A CN201811044722.1A CN201811044722A CN108899971A CN 108899971 A CN108899971 A CN 108899971A CN 201811044722 A CN201811044722 A CN 201811044722A CN 108899971 A CN108899971 A CN 108899971A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The present invention relates to micro-grid energy storage system battery pack balancing monitoring technical fields, more particularly to a kind of micro-grid energy storage system battery pack balancing monitoring device and method, device includes power power-supply module, control power module, balanced actively monitoring module and main control module, the power power-supply module input terminal connects main control module, power power-supply output end is respectively to control power module and balanced actively monitoring module for power supply, the equilibrium actively monitoring module includes multiple groups equalization control module, balanced execution module and actively monitoring module, the main control module is connected to each balanced execution module control terminal by equalization control module, direct current equilibrium power supply is connected to battery cell by balanced execution module actuating station, battery cell passes through actively monitoring module simultaneously and is connected to main control module.The present invention has actively monitoring function, at low cost, good compatibility, stability height, can be realized the efficient balance of each single battery in battery pack.
Description
Technical field
The present invention relates to micro-grid energy storage system battery pack balancing monitoring technical fields, and in particular to a kind of micro-capacitance sensor storage
It can system battery pack balancing monitoring device and method.
Background technique
It include multiple groups single battery in battery pack, it is more when in use as micro-grid energy storage system main energy sources
It is attached by the way of series-parallel, due to the single battery performance difference of objective reality, it is caused to export energy in long-time
When amount, necessarily there is the inconsistent situation of each monomer capacity, use for a long time certainly will shorten battery pack whole service life, increase
Energy-storage system maintenance cost, thus battery pack balancing system must be installed additional, and the precision maneuver of battery pack balancing system is be unable to do without
The micro-grid energy storage system of front end battery pack balancing monitoring device.
In realizing process of the present invention, inventor's discovery at least has the following defects in the prior art：
1, battery pack balancing monitoring function is not perfect, and balanced system front end device is easy to lead using the mode passively monitored
It causes battery pack balancing system erroneous judgement occur, the effect of efficient balance is not achieved or generates security risk；
2, the front end equilibrium monitoring device of battery pack balancing system is at high cost, and stability, poor compatibility.
It is found through analysis, the main reason for above problem occur is：
1, technological means is insufficient, it is difficult to realize the actively monitoring function of battery pack balancing system front end device；
2, integration module mostly being monitored using the lithium battery group equilibrium of foreign technology maturation, purchase cost is high, and flexibility is poor,
Individual for single battery higher than 5V is difficult to realize actively monitoring.
Summary of the invention
In order to solve the above technical problems, it is an object of the invention to：It is equal to provide a kind of micro-grid energy storage system battery pack
The monitoring device that weighs and method have actively monitoring function, at low cost, good compatibility, stability height, can be realized each in battery pack
The efficient balance of single battery.
The present invention is that technical solution used by solving its technical problem is：
Micro-grid energy storage system battery pack balancing monitoring device, including power power-supply module, control power module,
Balanced actively monitoring module and main control module, the power power-supply module input terminal connect main control module, and power power-supply is defeated
Outlet is respectively to control power module and balanced actively monitoring module for power supply, and the equilibrium actively monitoring module includes Balance route
Module, balanced execution module and actively monitoring module, the number of the equilibrium execution module number and battery cell in battery pack
Match, the main control module is connected to each balanced execution module control terminal, direct current equilibrium power supply by equalization control module
Positive and negative electrode is connected to the positive and negative anodes of corresponding battery cell, the positive and negative anodes of corresponding battery cell by balanced execution module actuating station
It is connected to the voltage signal output end of actively monitoring module simultaneously, the voltage signal output end of actively monitoring module is connected to master control
Molding block, main control module are connected to actively monitoring module control terminal.
In use, main control module sends battery cell recognition command to actively monitoring module, adopted by actively monitoring module
Collect the voltage signal of respective battery monomer and the data of acquisition are sent to by main control module, master control by voltage signal output end
Molding root tuber judges whether to need to be implemented balancing actions according to the numerical values recited received, if it is desired, main control module is to equilibrium
Control module sends the instruction for executing balancing actions, and the battery cell of balancing actions is needed to be implemented by equalization control module gating,
Balanced execution module actuating station connection direct current equilibrium power supply and corresponding battery cell carry out equalization operation, and equalization operation executes one
It fixes time, main control module judges whether to arrived balanced execution preset time (generally 2-5 minutes), to judge whether it needs
Continue to execute equalization operation, if it is desired, then continue to execute, if it is not needed, cutting direct current equilibrium power supply and present battery
The connection of monomer continues the monitoring and equalization operation of other battery cells.
Wherein, preferred embodiment is：
The power power-supply module include connecting terminal J1, power isolation module DCDC1-DCDC2, photoelectrical coupler P1,
Zener diode W1-W2, power switch tube Q1 and triode Q2, the base stage of triode Q2 and any port I/O of main control module
It is connected, the negative side of the collector connection photoelectrical coupler P1 input terminal luminous tube of triode Q2, photoelectrical coupler P1 input terminal
The side of the positive electrode of luminous tube connects 3.3V power cathode, light by resistance R5 connection 3.3V positive pole, the emitter of triode Q2
The positive and negative anodes of electric coupler P1 output end be respectively connected to network label KG and network label DS, connecting terminal J1 respectively with insurance
Silk F1 is connected with the positive terminal of diode D1, the negative pole end of diode D1 connection 12V positive pole, fuse F1 respectively with two poles
Pipe D2 is connected with the negative pole end of diode D3, and the negative pole end of diode D3 is connected with the positive terminal of diode D4, diode D2 and
The positive terminal of diode D3 is all connected with 12V power cathode, and the negative pole end of diode D4 is connected with the positive terminal of diode D5, two poles
The negative pole end of pipe D5 is connected with the drain electrode of the positive terminal of capacitor C1 and power switch tube Q1 respectively, the negative pole end connection of capacitor C1
12V power cathode, parallel resistance R1 between the drain electrode and base stage of power switch tube Q1, power isolation module DCDC1 and power supply every
Input positive terminal from module DCDC2 is connected with the source electrode of power switch tube Q1, the input anode of power isolation module DCDC1
End and negative pole end shunt capacitance C2, the negative pole end 12V positive pole of capacitor C2, the output cathode end of power isolation module DCDC1
Capacitor C3, capacitor C6 and zener diode W1, the cathode terminal network label of zener diode W1 are successively parallel with negative pole end
The input negative pole end of the positive terminal network label 485GND of 485VCC+, zener diode W1, power isolation module DCDC2 connect
Connect 12V power cathode, the output cathode end of power isolation module DCDC2 and negative pole end be successively parallel with capacitor C4, capacitor C5 and
The negative pole end of zener diode W2, zener diode W2 connect 5V positive pole, the positive terminal connection 5V electricity of zener diode W2
Source cathode.
Power power-supply module mainly uses conventional electronics, and circuit cost is low, high reliablity, passes through photoelectrical coupler P1
It realizes and the disconnecting switch of power switch tube Q1 is controlled, and then the system of real-time control power isolation module DCDC1, DCDC2 supplies
Electroresponse speed, overcomes the deficiency of balanced system power supply electrical stability difference in the prior art, while zener diode is arranged
W1-W2 further ensures the safety of balanced system power supply, enhances the reliability of power supply output.
The control power module includes three terminal regulator V1-V2 and power isolation module DCDC3, power isolation module
The input positive terminal and negative pole end shunt capacitance C7 of DCDC3, the output cathode end of power isolation module DCDC3 and negative pole end are successively
It is parallel with capacitor C8 and capacitor C9, the output cathode end of power isolation module DCDC3 is connected with the input terminal of three terminal regulator V1,
The output negative pole end of power isolation module DCDC3 is connected with 3.3V power cathode, output end and the 3.3V electricity of three terminal regulator V1
Source anode is connected, and resistance R6, the reference end of three terminal regulator V1 are parallel between the output end and reference end of three terminal regulator V1
It is connected with the cathode of three terminal regulator V2, capacitor C10 is connected in parallel on the output end and ginseng of three terminal regulator V1 after connecting with resistance R7
It examines between end, the anode of three terminal regulator V2 is connected with 3.3V power cathode, and resistance R7 is connected in parallel on 3.3V after connecting with resistance R8
Between power supply positive and negative electrode, the reference pole of three terminal regulator V2 is connected between resistance R7 and resistance R8,3.3V power supply positive and negative electrode
Between be also successively parallel with capacitor C11 and capacitor C12, it is ensured that control the precision and reliability of power supply, be main control module
Reliable and precision maneuver provides safeguard.
The equilibrium execution module includes triode Q3, zener diode W3, relay K1, connecting terminal J2-J3, three poles
The base stage of pipe Q3 is connected with balanced execution module control terminal, and balanced execution module control terminal connects main control module, triode Q3
Collector respectively with the positive terminal of zener diode W3 and relay K1 coil control input negative pole end be connected, relay K1 line
The negative pole end of circle control input positive terminal and zener diode W3 are connected with 12V positive pole respectively, resistance R9 and light-emitting diodes
The both ends of relay K1 coil control side are connected in parallel on after pipe LED1 series connection, direct current equilibrium power cathode DC- passes through relay K1 function
Rate end series connection self-recovery fuse F2 and battery cell cathode, battery cell cathode are connected with connecting terminal J2, the balanced electricity of direct current
The negative pole end and battery cell anode phase of source cathode DC- and direct current equilibrium positive pole DC+ parallel diode D6, diode D6
Even, battery cell anode is connected with connecting terminal J3, and every piece of single battery is correspondingly arranged one group of equilibrium execution module, realizes to not
With the actively monitoring of monomer voltage, compatibility is strong, safe and reliable, control response is simple in time.
The equalization control module includes photoelectrical coupler P2 and decoder U3, and the input terminal of decoder U3 is and main control
The port I/O of module is connected, and the port I/O of decoder U3 is connected to the output end of photoelectrical coupler P2 emission side, photoelectric coupling
The input terminal of device P2 emission side is connected with 5V positive pole, input terminal and the 12V positive pole phase of photoelectrical coupler P2 sensitive side
Even, the output end of photoelectrical coupler P2 sensitive side is connected with balanced execution module control terminal, the GND pin and gating of decoder U3
E2, E3 are connected with 5V power cathode at end, and the VDD pin and gated end E1 of decoder U3 is connected with 5V positive pole, realize
The dual resisteance of active equalization monitoring, high safety and reliability realize main control module and accordingly control equalization control module
The quick response of instruction.
The actively monitoring module includes digital simulation electronic switch module U1-U2, operational amplifier U1A, operation amplifier
Device U1B and operational amplifier U1C, the input terminal of operational amplifier U1A, operational amplifier U1B and operational amplifier U1C respectively with
The port I/O of main control module is connected, the output end of operational amplifier U1A respectively with digital simulation electronic switch module U1, U2
The address A end be connected, the output end of operational amplifier U1B respectively with the address the B end phase of digital simulation electronic switch module U1, U2
Even, the output end of operational amplifier U1C is connected with the address the C end of digital simulation electronic switch module U1, U2 respectively, digital simulation
The port GND of electronic switch module U1, U2 is connected with 5V power cathode, the vdd terminal of digital simulation electronic switch module U1, U2
Mouth is connected with 5V positive pole, and the port I/O of digital simulation electronic switch module U1 is connected with battery cell anode, digital mould
The port I/O of quasi- electronic switch module U1 is connected with battery cell cathode, and the port X of digital simulation electronic switch module U1 is electricity
Signal output end is pressed, voltage signal output end is connected to main control module, digital simulation electronics by monomer voltage sample circuit
The port X of switch module U2 is grounded, and realizes monomer electricity in battery pack by operational amplifier and digital simulation electronic switch module
The active equalization in pond monitors, and carries out effective electrical isolation between single battery each in battery pack, avoids battery pack balancing
System generates maloperation.
The monomer voltage sample circuit includes zener diode W4 and divider resistance R23, R24, divider resistance R23 high electricity
Position end connects voltage signal output end, and divider resistance R23 cold end series connection divider resistance R24, the place divider resistance R24 is end
Ground connection, divider resistance R24 distinguish shunt regulator diode W4 and capacitor C13, and zener diode W4 positive terminal connects master control molding
Block, it is higher using the circuit monomer battery voltage monitoring accuracy, it responds more timely.
The present invention provides a kind of above-mentioned micro-grid energy storage system of use and carries out balanced monitoring with battery pack balancing monitoring device
Method, include the following steps：
S1, main control module send battery identification instruction, are successively identified by actively monitoring module and access energy-storage system
Each single battery of battery pack, meanwhile, monomer voltage sample circuit acquires the voltage value of each single battery, and the voltage value is sent out
It send to main control module, executes S2；
S2, main control module judge whether each battery cell voltage value of acquisition is normal, if normal, turns S4, otherwise turns S3；
S3, main control module issue alarm, and monomer battery voltage is abnormal；
S4, main control module judges whether there is the single battery for meeting equilibrium condition, if so, turn S5, if not provided,
Fixed time intervals (generally taking 1-2 hours) execute S1 afterwards；
S5, main control module sends the equalization instruction for needing one piece of balanced single battery to equalization control module, and leads to
It crosses equalization control module and controls balanced execution module execution balancing actions, turn S6；
S6, balanced execution module execute equalization operation, and upload time for balance signal in real time to main control module, turn S7；
S7, if so, turning S1, otherwise turns S6 after main control module judges whether time for balance reaches preset time.
The main control module judges whether the single battery of access meets the logic of equilibrium condition and be：
Compare the cell voltage value of each single battery and energy-storage system batteries monomer electricity in energy-storage system battery pack one by one
The monomer voltage average value in pond, if there is the absolute difference of the cell voltage value and monomer voltage average value of single battery is greater than
Balanced preset value, then the single battery needs to carry out balanced, and the equilibrium preset value is according to different cell production companies, setting
Numerical value difference, operator can carry out flexible setting according to actual use situation, generally take 30-250mV.
Main control module judges whether the single battery of access is met equilibrium condition and can also be had using another logic
Body is：
If the difference of the monomer voltage maxima and minima of each single battery is greater than balanced accuse in energy-storage system battery pack
Alert value, the smallest single battery of cell voltage value is carried out it is balanced, the equilibrium warning value according to different cell production companies,
The numerical value of setting difference, generally takes 100mV.
Under normal circumstances, the standard value of main control module receives in step S2 battery cell voltage value and battery cell
Absolute value of the difference be more than that 3V assert that battery cell voltage value is abnormal.
Compared with prior art, the invention has the advantages that：
The present invention overcomes battery pack balancing monitoring functions in the prior art, and not perfect, balanced system front end device can only be adopted
With the deficiency of passive monitoring pattern, balanced system front end actively monitoring function is realized, has achieved the purpose that efficient balance, and should
The overall cost of micro-grid energy storage system battery pack balancing monitoring device is low, stability is high, good compatibility.When work, master control
Molding block sends battery cell recognition command to actively monitoring module, by the voltage of actively monitoring module acquisition respective battery monomer
The data of acquisition are simultaneously sent to main control module by voltage signal output end by signal, and main control module is according to the number received
Value size judges whether to need to be implemented balancing actions, if it is desired, main control module executes equilibrium to equalization control module transmission
The instruction of movement, the battery cell of balancing actions is needed to be implemented by equalization control module gating, and balanced execution module actuating station connects
Logical direct current equilibrium power supply and corresponding battery cell carry out equalization operation, and equalization operation executes after a certain period of time, actively monitoring mould
Block monitors the voltage value for executing the battery cell of equalization operation again, to judge whether it needs to continue to execute equalization operation, such as
Fruit needs, then continues to execute, if it is not needed, the connection of cutting direct current equilibrium power supply and present battery monomer, continues it
The monitoring and equalization operation of his battery cell.
Detailed description of the invention
Fig. 1 micro-grid energy storage system battery pack balancing monitoring device structural block diagram.
Fig. 2 equilibrium actively monitoring modular structure block diagram.
Fig. 3 controls power module circuit schematic.
Fig. 4 power power-supply module circuit diagram.
Fig. 5 equilibrium execution module circuit diagram.
Fig. 6 equalization control module circuit diagram.
Fig. 7 actively monitoring module circuit schematic.
Fig. 8 monomer voltage sample circuit schematic diagram.
Fig. 9 main control module Balance route flow chart.
Specific embodiment
The embodiment of the present invention is described further with reference to the accompanying drawing：
Embodiment 1：
As shown in Figs. 1-2, the battery pack balancing monitoring device of micro-grid energy storage system described in the present embodiment, including power electricity
Source module, control power module, balanced actively monitoring module and main control module, the power power-supply module input terminal connection master
Control module, power power-supply output end are respectively to control power module and balanced actively monitoring module for power supply, and the equilibrium is actively
Monitoring modular includes equalization control module, balanced execution module and actively monitoring module, the equilibrium execution module number and electricity
The number of battery cell matches in the group of pond, and the main control module is connected to each balanced execution module by equalization control module
Control terminal, direct current equilibrium power supply positive and negative electrode is connected to the positive and negative anodes of corresponding battery cell by balanced execution module actuating station, right
The voltage signal output end of actively monitoring module, the voltage letter of actively monitoring module are connected to when answering the positive and negative electrodes in same of battery cell
Number output end is connected to main control module, and main control module is connected to actively monitoring module control terminal, and main control module is monolithic
Machine, model select STM32F103VCT6.
As shown in figure 4, power power-supply module includes connecting terminal J1, power isolation module DCDC1-DCDC2, photoelectric coupling
Device P1, zener diode W1-W2, power switch tube Q1 and triode Q2, the base stage and any I/O of main control module of triode Q2
Port is connected, the negative side of the collector connection photoelectrical coupler P1 input terminal luminous tube of triode Q2, and photoelectrical coupler P1 is defeated
Enter to hold the side of the positive electrode of luminous tube by resistance R5 connection 3.3V positive pole, the emitter connection 3.3V power supply of triode Q2 is negative
Pole, the positive and negative anodes of photoelectrical coupler P1 output end are respectively connected to network label KG and network label DS, connecting terminal J1 difference
It is connected with the positive terminal of fuse F1 and diode D1, the negative pole end of diode D1 connects 12V positive pole, fuse F1 difference
It is connected with the negative pole end of diode D2 and diode D3, the negative pole end of diode D3 is connected with the positive terminal of diode D4, two poles
The positive terminal of pipe D2 and diode D3 are all connected with 12V power cathode, the positive terminal phase of the negative pole end and diode D5 of diode D4
Even, the negative pole end of diode D5 is connected with the drain electrode of the positive terminal of capacitor C1 and power switch tube Q1 respectively, the cathode of capacitor C1
End connection 12V power cathode, parallel resistance R1 between the drain electrode and base stage of power switch tube Q1, power isolation module DCDC1 and
The input positive terminal of power isolation module DCDC2 is connected with the source electrode of power switch tube Q1, and power isolation module DCDC1's is defeated
Enter the negative pole end 12V positive pole of positive terminal and negative pole end shunt capacitance C2, capacitor C2, the output of power isolation module DCDC1
Positive terminal and negative pole end are successively parallel with capacitor C3, capacitor C6 and zener diode W1, and the cathode of zener diode W1 terminates net
The input of the positive terminal network label 485GND of network label 485VCC+, zener diode W1, power isolation module DCDC2 are negative
Extreme connection 12V power cathode, the output cathode end of power isolation module DCDC2 and negative pole end are successively parallel with capacitor C4, electricity
Hold C5 and zener diode W2, the negative pole end of zener diode W2 connects 5V positive pole, and the positive terminal of zener diode W2 connects
Connect 5V power cathode.
Power switch tube Q1 selects N-channel type metal-oxide-semiconductor, and such as IRFS654B, triode Q2 generally select NPN type triode,
As S8050, photoelectrical coupler P1 select PC357C, diode D1-D5 to select 1N4007 or SR560, zener diode W1-W2 choosing
With 2CW series, capacitor selects 105 DEG C, pressure voltage 25V, capability value 100uF capacitors below, power isolation module DCDC1 and electricity
Source isolation module DCDC2 selects ZMD1205S, and circuit element uses conventional electronics, and circuit cost is low, high reliablity, passes through
Photoelectrical coupler P1, which is realized, controls the disconnecting switch of power switch tube Q1, and then real-time control power isolation module DCDC1,
The system power supply response speed of DCDC2 overcomes the deficiency of balanced system power supply electrical stability difference in the prior art, sets simultaneously
Zener diode W1-W2 is set, the safety of balanced system power supply is further ensured, enhances the reliability of power supply output.Function
Rate power module is control power module, balanced actively monitoring module and main control module provide DC12V, 5V, 3.3V direct current
Source, while necessary communication power supply is provided for other external RS485 communicating circuits accessed, main control module passes through power power-supply
The peripheral circuit of photoelectrical coupler P1 composition in modular circuit, real-time monitoring, the output for controlling power power-supply module.
Connecting terminal J1 accesses DC12V DC power supply, if the base stage of triode Q2 receives high level signal, photoelectricity coupling
Sensitive side one end of clutch P1 is connected, and network label KG, DS connection, power switch tube Q1 base stage is low level at this time, in pass
Disconnected state, RS485 communication power supply and direct current 5V power supply are without output at this time；Conversely, if the base stage of triode Q2 receives low electricity
Ordinary mail number, then the sensitive side of photoelectrical coupler P1 is not turned on, and network label KG, DS are disconnected, and power switch tube Q1 base stage is at this time
High level is in opening state, and RS485 communication power supply and direct current 5V power supply normally export at this time.
As shown in figure 3, control power module includes three terminal regulator V1-V2 and power isolation module DCDC3, isolated from power
The input positive terminal and negative pole end shunt capacitance C7, the output cathode end of power isolation module DCDC3 and negative pole end of module DCDC3
Successively it is parallel with capacitor C8 and capacitor C9, the output cathode end of power isolation module DCDC3 and the input terminal of three terminal regulator V1
Be connected, the output negative pole end of power isolation module DCDC3 is connected with 3.3V power cathode, the output end of three terminal regulator V1 and
3.3V positive pole is connected, and resistance R6 is parallel between the output end and reference end of three terminal regulator V1, three terminal regulator V1's
Reference end is connected with the cathode of three terminal regulator V2, and capacitor C10 is connected in parallel on the output of three terminal regulator V1 after connecting with resistance R7
Between end and reference end, the anode of three terminal regulator V2 is connected with 3.3V power cathode, and resistance R7 is in parallel after connecting with resistance R8
Between 3.3V power supply positive and negative electrode, the reference pole of three terminal regulator V2 is connected between resistance R7 and resistance R8,3.3V power supply
Capacitor C11 and capacitor C12 are also successively parallel between positive and negative electrode, it is ensured that control the precision and reliability of power supply, be main control
The reliable and precision maneuver of module provides safeguard, and it is straight that control power module mainly provides 3.3V required when main control module work
Galvanic electricity source, it is ensured that the stable operation of entire master control system module.
Capacitor C7~C12 selects 105 DEG C, pressure voltage 25V, capability value 100uF capacitors below, and resistance R6~R8 selects essence
The resistance of 1% or more degree, three terminal regulator V1 select LM317T, three terminal regulator V2 to select controllable accurate source of stable pressure TL431, electricity
Source isolation module DCDC2 selects ZMD1212S.
As shown in figure 5, balanced execution module includes triode Q3, zener diode W3, relay K1, connecting terminal J2-
J3, the base stage of triode Q3 are connected with balanced execution module control terminal KQ1, and balanced execution module control terminal connects master control molding
Block, the collector of triode Q3 input negative pole end phase with the positive terminal of zener diode W3 and the control of relay K1 coil respectively
Even, the negative pole end of relay K1 coil control input positive terminal and zener diode W3 are connected with 12V positive pole respectively, resistance
R9 and Light-emitting diode LED 1 are connected in parallel on the both ends of relay K1 coil control side after connecting, direct current equilibrium power cathode DC- is logical
Cross relay K1 power end series connection self-recovery fuse F2 and battery cell cathode, battery cell cathode and connecting terminal J2 phase
Even, the negative pole end and electricity of direct current equilibrium power cathode DC- and direct current equilibrium positive pole DC+ parallel diode D6, diode D6
Pond monomer anode is connected, and battery cell anode is connected with connecting terminal J3, and every piece of single battery is correspondingly arranged one group of equilibrium and executes
Module realizes the actively monitoring to different monomers voltage, and compatibility is strong, safe and reliable, control response is simple in time.
Each battery cell in battery pack is correspondingly arranged one group of equilibrium execution module, by taking first via battery cell as an example,
The positive and negative anodes of the battery cell are respectively that network label VB1+, VB1- indicate that network label VB1+, VB1- is led in Fig. 5
Control module confirmation is open-minded, i.e., confirms at this time and be ready for equalization operation to first via single battery, and main control module sends high
Level signal is to balanced execution module control terminal, and triode Q3 is connected at this time, and relay K1 coil is powered, relay K1 power end
It is attracted, network label VB1+ completes to control the actively monitoring of first via monomer battery voltage through actively monitoring module；It is other each
The balanced actively monitoring control of single battery is identical with this.Resistance R9 and R10 use accuracy value less than 1%, light emitting diode
LED1 selects emitting red light source, and triode Q3 selects S8050, zener diode W3 that SF28, relay K1 is selected to select macro hair rule
Lattice are the coil relay of 12V, and diode D6 selects Schottky fast recovery diode MBR3060PT, self-recovery fuse F2 choosing
With specification be pressure voltage 12V, blowout current is 600 milliamperes, which uses above-mentioned electronic device, at low cost, stability is good；It adopts
The actively monitoring to different monomers voltage can be realized with above-mentioned connection type, and compatibility is strong, safe and reliable, control response is simple in time
It is single, active equalization monitoring can be achieved to the single battery of univoltage range 1-12V.
As shown in fig. 6, equalization control module includes photoelectrical coupler P2 and decoder U3, the input terminal A0- of decoder U3
A2 is connected with the port I/O of main control module, and the port I/O of decoder U3 is connected to the output of photoelectrical coupler P2 emission side
End, the input terminal of photoelectrical coupler P2 emission side are connected with 5V positive pole, the input terminal and 12V of photoelectrical coupler P2 sensitive side
Positive pole is connected, and the output end of photoelectrical coupler P2 sensitive side is connected with balanced execution module control terminal, the GND of decoder U3
Pin and gated end E2, E3 are connected with 5V power cathode, the VDD pin and gated end E1 of decoder U3 with 5V positive pole
It is connected, realizes the dual resisteance of active equalization monitoring, high safety and reliability realizes main control module to equalization control module
The quick response of corresponding control instruction.
The input terminal A0-A2 of decoder U3 receives the high and low level combinations signal from main control module, so that gating is translated
The channel Q1 of code device U3 is high level or low level, when the channel Q1 is low level, by what is exported when photoelectrical coupler P2
Balanced execution module control signal KQ1 is high level, and the triode Q3 conducting in Fig. 5, relay K1 coil are powered at this time, after
Electric appliance K1 power end is attracted, and the gated fashion of other each single batteries is identical with this.
In Fig. 6, gated end E1 is high level, and gated end E2 (-), E3 (one) are low level, and main control module is to translating at this time
The input terminal A0-A2 of code device U3 sends high and low level combinations signal (0,0,1), i.e. hexadecimal instructs 0X01, then it is defeated to decode U3
The high and low level combinations of outlet Q0-Q7 are (1,0,1,1,1,1,1,1), i.e., corresponding network label Q1 at this time is low level, light
The circuit that the corresponding network label Q1 of the emission side input terminal of electric coupler P2 is constituted is connected, then the sensitive side of photoelectrical coupler P2
The corresponding balanced execution module control signal KQ1 of output end is high level, remaining network label of photoelectrical coupler P emission side
Q2, Q3 etc. are that high level is not turned on, and only first via single battery carries out equilibrium at this time；If main control module is to decoder U3
Input terminal A0-A2 send high and low level combinations signal (0,1,0), i.e. hexadecimal instructs 0X02, then decoder U3 output end
The high and low level combinations of Q0-Q7 are (1,1,0,1,1,1,1,1), i.e., corresponding network label Q2 at this time is low level, photoelectricity coupling
The circuit conducting that the corresponding network label Q2 of the emission side input terminal of clutch P2 is constituted, then the sensitive side output of photoelectrical coupler P2
Holding corresponding second road single battery equilibrium execution module control signal KQ2 is high level, photoelectrical coupler P2 emission side its
Co-net network label Q1, Q3 etc. are that high level is not turned on, and only the second road single battery carries out balanced, other each road situations at this time
And so on.Photoelectrical coupler P2 selects PS2801-4, decoder U3 to select 74LS138, which uses above-mentioned electronic device,
At low cost, high reliablity, using above-mentioned connection type, it can be achieved that active equalization monitoring dual resisteance, high safety and reliability, together
When main control module can be realized to the quick response of the corresponding control instruction of equalization control module.
As shown in fig. 7, actively monitoring module includes digital simulation electronic switch module U1-U2, operational amplifier U1A, fortune
Calculate amplifier U1B and operational amplifier U1C, the input terminal of operational amplifier U1A, operational amplifier U1B and operational amplifier U1C
Be connected respectively with the port I/O of main control module, the output end of operational amplifier U1A respectively with digital simulation electronic switch module
The address the A end of U1, U2 is connected, and the output end of operational amplifier U1B is respectively with the B of digital simulation electronic switch module U1, U2
Location end is connected, and the output end of operational amplifier U1C is connected with the address the C end of digital simulation electronic switch module U1, U2 respectively, number
The port GND that type matrix intends electronic switch module U1, U2 is connected with 5V power cathode, digital simulation electronic switch module U1, U2
Vdd terminal mouth be connected with 5V positive pole, the port I/O and the battery cell anode phase of digital simulation electronic switch module U1
Even, the port I/O of digital simulation electronic switch module U1 is connected with battery cell cathode, digital simulation electronic switch module U1's
The port X is voltage signal output end, and voltage signal output end is connected to main control module by monomer voltage sample circuit, number
The port X of simulant electronic switch module U2 is grounded, and realizes battery pack by operational amplifier and digital simulation electronic switch module
The active equalization of interior single battery monitors, and carries out effective electrical isolation between single battery each in battery pack, avoids electricity
Group equal balance system in pond generates maloperation.
Main control module by three operational amplifier transmission level signals combine to digital simulation electronic switch module U1,
The address end of U2 to flexibly control opening and turning off for each port I/O of digital simulation electronic switch module U1, U2, and passes through
Each monomer voltage sampled value is sent to main control module, main control module root by the port X of digital simulation electronic switch module U1
Movement is executed according to the subsequent equalization that the sampled value of transmission further monitors battery pack balancing system.As main control module is sent to fortune
The level signal group for calculating amplifier U1C, U1B, U1A is combined into (0,0,1), i.e., hexadecimal instructs 0X01, then digital simulation electronics
The port x1 of switch module U1, U2 are logical with monomer voltage sample circuit and 5V power ground termination respectively, when main control module is sent out
Send hexadecimal instruct 0X02 when, the port x2 of digital simulation electronic switch module U1, U2 respectively with monomer voltage sample circuit
It is logical with 5V power ground termination, i.e., active equalization monitoring is carried out to the second road single battery, when main control module send 16 into
System instruction 0X03 when, the port x3 of digital simulation electronic switch module U1, U2 respectively with monomer voltage sample circuit and 5V power supply
Ground terminal is connected, i.e., carries out active equalization monitoring, the gating and so on of other ports to third road single battery.Resistance R11
It is 1% precision resistance that~R13, which selects precision, and operational amplifier U1 selects LM258 or LM358, digital simulation electronic switch mould
Block U1 and U2 select CD4051, which selects above-mentioned electronic device, at low cost, high reliablity；The above-mentioned connection type used,
It can be achieved to avoid battery pack balancing system to the effective electrical isolation and actively monitoring function between single battery each in battery pack
Generate maloperation.
The monomer voltage sample circuit includes zener diode W4 and divider resistance R23, R24, divider resistance R23 high electricity
Position end connects voltage signal output end, and divider resistance R23 cold end series connection divider resistance R24, the place divider resistance R24 is end
Ground connection, divider resistance R24 distinguish shunt regulator diode W4 and capacitor C13, and zener diode W4 positive terminal connects master control molding
Block, it is higher using the circuit monomer battery voltage monitoring accuracy, it responds more timely.
When work, main control module sends battery cell recognition command to actively monitoring module, is adopted by actively monitoring module
Collect the voltage signal of respective battery monomer and the data of acquisition are sent to by main control module, master control by voltage signal output end
Molding root tuber judges whether to need to be implemented balancing actions according to the numerical values recited received, if it is desired, main control module is to equilibrium
Control module sends the instruction for executing balancing actions, and the battery cell of balancing actions is needed to be implemented by equalization control module gating,
Balanced execution module actuating station connection direct current equilibrium power supply and corresponding battery cell carry out equalization operation, and equalization operation executes one
It fixes time, main control module judges whether to arrived balanced execution preset time (generally 2-5 minutes), to judge whether it needs
Continue to execute equalization operation, if it is desired, then continue to execute, if it is not needed, cutting direct current equilibrium power supply and present battery
The connection of monomer continues the monitoring and equalization operation of other battery cells.
Embodiment 2：
The present embodiment on the basis of embodiment 1, provides a kind of using above-mentioned micro-grid energy storage system battery pack balancing
The method that monitoring device carries out balanced monitoring, as shown in figure 9, including the following steps：
S1, main control module send battery identification instruction, are successively identified by actively monitoring module and access energy-storage system
Each single battery of battery pack, meanwhile, monomer voltage sample circuit acquires the voltage value of each single battery, and the voltage value is sent out
It send to main control module, executes S2；
S2, main control module judge whether each battery cell voltage value of acquisition is normal, if normal, turns S4, otherwise turns S3；
S3, main control module issue alarm, and monomer battery voltage is abnormal；
S4, main control module judges whether there is the single battery for meeting equilibrium condition, if so, turn S5, if not provided,
Fixed time intervals (generally taking 1-2 hours) execute S1 afterwards；
S5, main control module sends the equalization instruction for needing one piece of balanced single battery to equalization control module, and leads to
It crosses equalization control module and controls balanced execution module execution balancing actions, turn S6；
S6, balanced execution module execute equalization operation, and upload time for balance signal in real time to main control module, turn S7；
S7, after main control module judges whether time for balance reaches preset time (generally taking 2-5 minutes), if so, turn S1,
Otherwise turn S6.
Before step S1 execution, device first carries out power self test, and self-test process is：
S01, the operation of main control module system initialization, data initialization go to step S02；
S02, power-supply system inspection, main control module receive control power module, balanced actively monitoring module and power electricity
The power self test signal of source module, turns S03；
S03, the system electricity of main control module judgement control power module, balanced actively monitoring module and power power-supply module
Whether pressure is normal, turns S1 if normal, otherwise turns S04；
S04, power system failure alarm, main control module restore init state.
The main control module judges whether the single battery of access meets the logic of equilibrium condition and be：
Compare the cell voltage value of each single battery and energy-storage system batteries monomer electricity in energy-storage system battery pack one by one
The monomer voltage average value in pond, if there is the absolute difference of the cell voltage value and monomer voltage average value of single battery is greater than
Balanced preset value, then the single battery needs to carry out balanced, and the equilibrium preset value is according to different cell production companies, setting
Numerical value difference, operator can carry out flexible setting according to actual use situation, generally take 30-250mV.
Embodiment 3：
The present embodiment has adjusted main control module and judges whether the single battery of access meets on the basis of embodiment 2
The logic of equilibrium condition, specially：
If the difference of the monomer voltage maxima and minima of each single battery is greater than balanced accuse in energy-storage system battery pack
Alert value, the smallest single battery of cell voltage value is carried out it is balanced, the equilibrium warning value according to different cell production companies,
The numerical value of setting difference, generally takes 100mV.
Claims (10)
1. a kind of micro-grid energy storage system battery pack balancing monitoring device, which is characterized in that including power power-supply module, control
Power module, balanced actively monitoring module and main control module, the power power-supply module input terminal connect main control module, function
Rate power output end is respectively to control power module and balanced actively monitoring module for power supply, and the equilibrium actively monitoring module includes
Equalization control module, balanced execution module and actively monitoring module, the equilibrium execution module number and battery list in battery pack
The number of body matches, and the main control module is connected to each balanced execution module control terminal, direct current by equalization control module
Balanced power supply positive and negative electrode is connected to the positive and negative anodes of corresponding battery cell, corresponding battery cell by balanced execution module actuating station
Positive and negative electrodes in same when be connected to the voltage signal output end of actively monitoring module, the voltage signal output end of actively monitoring module connects
It is connected to main control module, main control module is connected to actively monitoring module control terminal.
2. micro-grid energy storage system according to claim 1 battery pack balancing monitoring device, which is characterized in that the function
Rate power module includes connecting terminal J1, power isolation module DCDC1-DCDC2, photoelectrical coupler P1, zener diode W1-
The base stage of W2, power switch tube Q1 and triode Q2, triode Q2 are connected with any port I/O of main control module, triode Q2
Collector connection photoelectrical coupler P1 input terminal luminous tube negative side, the side of the positive electrode of photoelectrical coupler P1 input terminal luminous tube
By resistance R5 connection 3.3V positive pole, the emitter of triode Q2 connects 3.3V power cathode, photoelectrical coupler P1 output
The positive and negative anodes at end be respectively connected to network label KG and network label DS, connecting terminal J1 respectively with fuse F1 and diode D1
Positive terminal be connected, the negative pole end of diode D1 connects 12V positive pole, fuse F1 respectively with diode D2 and diode D3
Negative pole end be connected, the negative pole end of diode D3 is connected with the positive terminal of diode D4, the anode of diode D2 and diode D3
End is all connected with 12V power cathode, and the negative pole end of diode D4 is connected with the positive terminal of diode D5, the negative pole end point of diode D5
It is not connected with the drain electrode of the positive terminal of capacitor C1 and power switch tube Q1, the negative pole end of capacitor C1 connects 12V power cathode, power
Parallel resistance R1 between the drain electrode and base stage of switching tube Q1, the input of power isolation module DCDC1 and power isolation module DCDC2
Positive terminal is connected with the source electrode of power switch tube Q1, the input positive terminal and negative pole end of power isolation module DCDC1 electricity in parallel
Hold C2, the negative pole end 12V positive pole of capacitor C2, the output cathode end of power isolation module DCDC1 and negative pole end are successively in parallel
There are capacitor C3, capacitor C6 and zener diode W1, the cathode terminal network label 485VCC+ of zener diode W1, two pole of pressure stabilizing
The input negative pole end of the positive terminal network label 485GND of pipe W1, power isolation module DCDC2 connect 12V power cathode, electricity
The output cathode end of source isolation module DCDC2 and negative pole end are successively parallel with capacitor C4, capacitor C5 and zener diode W2, pressure stabilizing
The negative pole end of diode W2 connects 5V positive pole, and the positive terminal of zener diode W2 connects 5V power cathode.
3. micro-grid energy storage system according to claim 1 battery pack balancing monitoring device, which is characterized in that the control
Power module processed includes three terminal regulator V1-V2 and power isolation module DCDC3, the input anode of power isolation module DCDC3
End and negative pole end shunt capacitance C7, the output cathode end of power isolation module DCDC3 and negative pole end be successively parallel with capacitor C8 and
The output cathode end of capacitor C9, power isolation module DCDC3 are connected with the input terminal of three terminal regulator V1, power isolation module
The output negative pole end of DCDC3 is connected with 3.3V power cathode, and the output end of three terminal regulator V1 is connected with 3.3V positive pole, and three
It holds and is parallel with resistance R6 between the output end and reference end of voltage-stablizer V1, the reference end of three terminal regulator V1 and three terminal regulator V2
Cathode be connected, capacitor C10 is connected in parallel between the output end and reference end of three terminal regulator V1 after connecting with resistance R7, and three ends are steady
The anode of depressor V2 is connected with 3.3V power cathode, and resistance R7 is connected in parallel between 3.3V power supply positive and negative electrode after connecting with resistance R8,
The reference pole of three terminal regulator V2 is connected between resistance R7 and resistance R8, is also successively parallel between 3.3V power supply positive and negative electrode
Capacitor C11 and capacitor C12.
4. micro-grid energy storage system according to claim 1 battery pack balancing monitoring device, which is characterized in that described equal
Weighing apparatus execution module includes triode Q3, zener diode W3, relay K1, connecting terminal J2-J3, the base stage of triode Q3 and
The execution module control terminal that weighs is connected, and balanced execution module control terminal connects main control module, the collector of triode Q3 respectively with
The positive terminal of zener diode W3 controls input negative pole end with relay K1 coil and is connected, relay K1 coil control input anode
End and the negative pole end of zener diode W3 are connected with 12V positive pole respectively, after resistance R9 and the series connection of Light-emitting diode LED 1 simultaneously
The both ends of relay K1 coil control side are associated in, direct current equilibrium power cathode DC- passes through relay K1 power end series connection self- recoverage
Fuse F2 and battery cell cathode, battery cell cathode are connected with connecting terminal J2, direct current equilibrium power cathode DC- and direct current
Balanced positive pole DC+ parallel diode D6, the negative pole end of diode D6 are connected with battery cell anode, battery cell anode with
Connecting terminal J3 is connected.
5. micro-grid energy storage system according to claim 4 battery pack balancing monitoring device, which is characterized in that described equal
Weighing apparatus control module includes photoelectrical coupler P2 and decoder U3, the input terminal of decoder U3 with the port I/O of main control module
Be connected, the port I/O of decoder U3 is connected to the output end of photoelectrical coupler P2 emission side, photoelectrical coupler P2 emission side it is defeated
Enter end to be connected with 5V positive pole, the input terminal of photoelectrical coupler P2 sensitive side is connected with 12V positive pole, photoelectrical coupler P2
The output end of sensitive side is connected with balanced execution module control terminal, and the GND pin and gated end E2, E3 of decoder U3 is electric with 5V
Source cathode is connected, and the VDD pin and gated end E1 of decoder U3 is connected with 5V positive pole.
6. micro-grid energy storage system according to claim 1 battery pack balancing monitoring device, which is characterized in that the master
Dynamic monitoring modular includes digital simulation electronic switch module U1-U2, operational amplifier U1A, operational amplifier U1B and operation amplifier
Device U1C, the input terminal of operational amplifier U1A, operational amplifier U1B and operational amplifier U1C respectively with the I/O of main control module
Port is connected, and the output end of operational amplifier U1A is connected with the address the A end of digital simulation electronic switch module U1, U2 respectively, fortune
The output end for calculating amplifier U1B is connected with the address the B end of digital simulation electronic switch module U1, U2 respectively, operational amplifier U1C
Output end be connected respectively with the address the C end of digital simulation electronic switch module U1, U2, digital simulation electronic switch module U1,
The port GND of U2 is connected with 5V power cathode, the vdd terminal mouth of digital simulation electronic switch module U1, U2 with 5V power supply just
Extremely it is connected, the port I/O of digital simulation electronic switch module U1 is connected with battery cell anode, digital simulation electronic switch module
The port I/O of U1 is connected with battery cell cathode, and the port X of digital simulation electronic switch module U1 is voltage signal output end,
Voltage signal output end is connected to main control module, the X of digital simulation electronic switch module U2 by monomer voltage sample circuit
Port ground connection.
7. micro-grid energy storage system according to claim 6 battery pack balancing monitoring device, which is characterized in that the list
Bulk voltage sample circuit includes zener diode W4 and divider resistance R23, R24, and divider resistance R23 hot end connects voltage letter
Number output end, divider resistance R23 cold end are connected divider resistance R24, and the place divider resistance R24 is end ground connection, divider resistance
R24 distinguishes shunt regulator diode W4 and capacitor C13, and zener diode W4 positive terminal connects main control module.
8. a kind of carried out using the described in any item micro-grid energy storage systems of claim 1-7 with battery pack balancing monitoring device
Weigh the method monitored, which is characterized in that includes the following steps：
S1, main control module send battery identification instruction, are successively identified by actively monitoring module and access energy-storage system battery
Each single battery of group, meanwhile, monomer voltage sample circuit acquires the voltage value of each single battery, and the voltage value is sent to
Main control module executes S2；
S2, main control module judge whether each battery cell voltage value of acquisition is normal, if normal, turns S4, otherwise turns S3；
S3, main control module issue alarm, and monomer battery voltage is abnormal；
S4, main control module judges whether there is the single battery for meeting equilibrium condition, if so, turning S5, if not provided, interval
Set time (generally taking 1-2 hours) executes S1 afterwards；
S5, main control module send the equalization instruction for needing one piece of balanced single battery to equalization control module, and by equal
The control module that weighs controls balanced execution module and executes balancing actions, turns S6；
S6, balanced execution module execute equalization operation, and upload time for balance signal in real time to main control module, turn S7；
S7, if so, turning S1, otherwise turns S6 after main control module judges whether time for balance reaches preset time.
9. according to claim 8 carry out balanced monitoring side with battery pack balancing monitoring device using micro-grid energy storage system
Method, which is characterized in that the main control module judges whether the single battery of access meets the logic of equilibrium condition and be：
Compare the cell voltage value of each single battery and energy-storage system batteries monomer battery in energy-storage system battery pack one by one
Monomer voltage average value, if there is cell voltage value and the absolute difference of monomer voltage average value of single battery be greater than it is balanced
Preset value, then the single battery needs to carry out balanced.
10. according to claim 8 carry out balanced monitoring with battery pack balancing monitoring device using micro-grid energy storage system
Method, which is characterized in that the main control module judges whether the single battery of access meets the logic of equilibrium condition and be：
If the difference of the monomer voltage maxima and minima of each single battery is greater than balanced alarm in energy-storage system battery pack
Value carries out the smallest single battery of cell voltage value balanced.
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